drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microchip PQI-based storage controllers
   4  *    Copyright (c) 2019-2023 Microchip Technology Inc. and its subsidiaries
   5  *    Copyright (c) 2016-2018 Microsemi Corporation
   6  *    Copyright (c) 2016 PMC-Sierra, Inc.
   7  *
   8  *    Questions/Comments/Bugfixes to [email protected]
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/sched.h>
  18 #include <linux/rtc.h>
  19 #include <linux/bcd.h>
  20 #include <linux/reboot.h>
  21 #include <linux/cciss_ioctl.h>
  22 #include <linux/blk-mq-pci.h>
  23 #include <scsi/scsi_host.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_transport_sas.h>
  28 #include <asm/unaligned.h>
  29 #include "smartpqi.h"
  30 #include "smartpqi_sis.h"
  31
  32 #if !defined(BUILD_TIMESTAMP)
  33 #define BUILD_TIMESTAMP
  34 #endif
  35
  36 #define DRIVER_VERSION          "2.1.26-030"
  37 #define DRIVER_MAJOR            2
  38 #define DRIVER_MINOR            1
  39 #define DRIVER_RELEASE          26
  40 #define DRIVER_REVISION         30
  41
  42 #define DRIVER_NAME             "Microchip SmartPQI Driver (v" \
  43                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  44 #define DRIVER_NAME_SHORT       "smartpqi"
  45
  46 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  47
  48 #define PQI_POST_RESET_DELAY_SECS                       5
  49 #define PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS      10
  50
  51 #define PQI_NO_COMPLETION       ((void *)-1)
  52
  53 MODULE_AUTHOR("Microchip");
  54 MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
  55         DRIVER_VERSION);
  56 MODULE_VERSION(DRIVER_VERSION);
  57 MODULE_LICENSE("GPL");
  58
  59 struct pqi_cmd_priv {
  60         int this_residual;
  61 };
  62
  63 static struct pqi_cmd_priv *pqi_cmd_priv(struct scsi_cmnd *cmd)
  64 {
  65         return scsi_cmd_priv(cmd);
  66 }
  67
  68 static void pqi_verify_structures(void);
  69 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
  70         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason);
  71 static void pqi_ctrl_offline_worker(struct work_struct *work);
  72 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  73 static void pqi_scan_start(struct Scsi_Host *shost);
  74 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  75         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  76         struct pqi_io_request *io_request);
  77 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  78         struct pqi_iu_header *request, unsigned int flags,
  79         struct pqi_raid_error_info *error_info);
  80 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  81         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  82         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  83         struct pqi_encryption_info *encryption_info, bool raid_bypass, bool io_high_prio);
  84 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
  85         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  86         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  87         struct pqi_scsi_dev_raid_map_data *rmd);
  88 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
  89         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  90         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  91         struct pqi_scsi_dev_raid_map_data *rmd);
  92 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  93 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  94 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
  95 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
  96 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  97 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  98 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  99         struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs);
 100 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info);
 101 static void pqi_tmf_worker(struct work_struct *work);
 102
 103 /* for flags argument to pqi_submit_raid_request_synchronous() */
 104 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
 105
 106 static struct scsi_transport_template *pqi_sas_transport_template;
 107
 108 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
 109
 110 enum pqi_lockup_action {
 111         NONE,
 112         REBOOT,
 113         PANIC
 114 };
 115
 116 static enum pqi_lockup_action pqi_lockup_action = NONE;
 117
 118 static struct {
 119         enum pqi_lockup_action  action;
 120         char                    *name;
 121 } pqi_lockup_actions[] = {
 122         {
 123                 .action = NONE,
 124                 .name = "none",
 125         },
 126         {
 127                 .action = REBOOT,
 128                 .name = "reboot",
 129         },
 130         {
 131                 .action = PANIC,
 132                 .name = "panic",
 133         },
 134 };
 135
 136 static unsigned int pqi_supported_event_types[] = {
 137         PQI_EVENT_TYPE_HOTPLUG,
 138         PQI_EVENT_TYPE_HARDWARE,
 139         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 140         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 141         PQI_EVENT_TYPE_OFA,
 142         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 143         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 144 };
 145
 146 static int pqi_disable_device_id_wildcards;
 147 module_param_named(disable_device_id_wildcards,
 148         pqi_disable_device_id_wildcards, int, 0644);
 149 MODULE_PARM_DESC(disable_device_id_wildcards,
 150         "Disable device ID wildcards.");
 151
 152 static int pqi_disable_heartbeat;
 153 module_param_named(disable_heartbeat,
 154         pqi_disable_heartbeat, int, 0644);
 155 MODULE_PARM_DESC(disable_heartbeat,
 156         "Disable heartbeat.");
 157
 158 static int pqi_disable_ctrl_shutdown;
 159 module_param_named(disable_ctrl_shutdown,
 160         pqi_disable_ctrl_shutdown, int, 0644);
 161 MODULE_PARM_DESC(disable_ctrl_shutdown,
 162         "Disable controller shutdown when controller locked up.");
 163
 164 static char *pqi_lockup_action_param;
 165 module_param_named(lockup_action,
 166         pqi_lockup_action_param, charp, 0644);
 167 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 168         "\t\tSupported: none, reboot, panic\n"
 169         "\t\tDefault: none");
 170
 171 static int pqi_expose_ld_first;
 172 module_param_named(expose_ld_first,
 173         pqi_expose_ld_first, int, 0644);
 174 MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
 175
 176 static int pqi_hide_vsep;
 177 module_param_named(hide_vsep,
 178         pqi_hide_vsep, int, 0644);
 179 MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
 180
 181 static int pqi_disable_managed_interrupts;
 182 module_param_named(disable_managed_interrupts,
 183         pqi_disable_managed_interrupts, int, 0644);
 184 MODULE_PARM_DESC(disable_managed_interrupts,
 185         "Disable the kernel automatically assigning SMP affinity to IRQs.");
 186
 187 static unsigned int pqi_ctrl_ready_timeout_secs;
 188 module_param_named(ctrl_ready_timeout,
 189         pqi_ctrl_ready_timeout_secs, uint, 0644);
 190 MODULE_PARM_DESC(ctrl_ready_timeout,
 191         "Timeout in seconds for driver to wait for controller ready.");
 192
 193 static char *raid_levels[] = {
 194         "RAID-0",
 195         "RAID-4",
 196         "RAID-1(1+0)",
 197         "RAID-5",
 198         "RAID-5+1",
 199         "RAID-6",
 200         "RAID-1(Triple)",
 201 };
 202
 203 static char *pqi_raid_level_to_string(u8 raid_level)
 204 {
 205         if (raid_level < ARRAY_SIZE(raid_levels))
 206                 return raid_levels[raid_level];
 207
 208         return "RAID UNKNOWN";
 209 }
 210
 211 #define SA_RAID_0               0
 212 #define SA_RAID_4               1
 213 #define SA_RAID_1               2       /* also used for RAID 10 */
 214 #define SA_RAID_5               3       /* also used for RAID 50 */
 215 #define SA_RAID_51              4
 216 #define SA_RAID_6               5       /* also used for RAID 60 */
 217 #define SA_RAID_TRIPLE          6       /* also used for RAID 1+0 Triple */
 218 #define SA_RAID_MAX             SA_RAID_TRIPLE
 219 #define SA_RAID_UNKNOWN         0xff
 220
 221 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 222 {
 223         pqi_prep_for_scsi_done(scmd);
 224         scsi_done(scmd);
 225 }
 226
 227 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 228 {
 229         sdev->no_write_same = 1;
 230 }
 231
 232 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 233 {
 234         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 235 }
 236
 237 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 238 {
 239         return !device->is_physical_device;
 240 }
 241
 242 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 243 {
 244         return scsi3addr[2] != 0;
 245 }
 246
 247 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 248 {
 249         return !ctrl_info->controller_online;
 250 }
 251
 252 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 253 {
 254         if (ctrl_info->controller_online)
 255                 if (!sis_is_firmware_running(ctrl_info))
 256                         pqi_take_ctrl_offline(ctrl_info, PQI_FIRMWARE_KERNEL_NOT_UP);
 257 }
 258
 259 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 260 {
 261         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 262 }
 263
 264 #define PQI_DRIVER_SCRATCH_PQI_MODE                     0x1
 265 #define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED          0x2
 266
 267 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
 268 {
 269         return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
 270 }
 271
 272 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 273         enum pqi_ctrl_mode mode)
 274 {
 275         u32 driver_scratch;
 276
 277         driver_scratch = sis_read_driver_scratch(ctrl_info);
 278
 279         if (mode == PQI_MODE)
 280                 driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
 281         else
 282                 driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
 283
 284         sis_write_driver_scratch(ctrl_info, driver_scratch);
 285 }
 286
 287 static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
 288 {
 289         return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
 290 }
 291
 292 static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
 293 {
 294         u32 driver_scratch;
 295
 296         driver_scratch = sis_read_driver_scratch(ctrl_info);
 297
 298         if (is_supported)
 299                 driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 300         else
 301                 driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 302
 303         sis_write_driver_scratch(ctrl_info, driver_scratch);
 304 }
 305
 306 static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
 307 {
 308         ctrl_info->scan_blocked = true;
 309         mutex_lock(&ctrl_info->scan_mutex);
 310 }
 311
 312 static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
 313 {
 314         ctrl_info->scan_blocked = false;
 315         mutex_unlock(&ctrl_info->scan_mutex);
 316 }
 317
 318 static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
 319 {
 320         return ctrl_info->scan_blocked;
 321 }
 322
 323 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 324 {
 325         mutex_lock(&ctrl_info->lun_reset_mutex);
 326 }
 327
 328 static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
 329 {
 330         mutex_unlock(&ctrl_info->lun_reset_mutex);
 331 }
 332
 333 static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
 334 {
 335         struct Scsi_Host *shost;
 336         unsigned int num_loops;
 337         int msecs_sleep;
 338
 339         shost = ctrl_info->scsi_host;
 340
 341         scsi_block_requests(shost);
 342
 343         num_loops = 0;
 344         msecs_sleep = 20;
 345         while (scsi_host_busy(shost)) {
 346                 num_loops++;
 347                 if (num_loops == 10)
 348                         msecs_sleep = 500;
 349                 msleep(msecs_sleep);
 350         }
 351 }
 352
 353 static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 354 {
 355         scsi_unblock_requests(ctrl_info->scsi_host);
 356 }
 357
 358 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 359 {
 360         atomic_inc(&ctrl_info->num_busy_threads);
 361 }
 362
 363 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 364 {
 365         atomic_dec(&ctrl_info->num_busy_threads);
 366 }
 367
 368 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 369 {
 370         return ctrl_info->block_requests;
 371 }
 372
 373 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 374 {
 375         ctrl_info->block_requests = true;
 376 }
 377
 378 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 379 {
 380         ctrl_info->block_requests = false;
 381         wake_up_all(&ctrl_info->block_requests_wait);
 382 }
 383
 384 static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 385 {
 386         if (!pqi_ctrl_blocked(ctrl_info))
 387                 return;
 388
 389         atomic_inc(&ctrl_info->num_blocked_threads);
 390         wait_event(ctrl_info->block_requests_wait,
 391                 !pqi_ctrl_blocked(ctrl_info));
 392         atomic_dec(&ctrl_info->num_blocked_threads);
 393 }
 394
 395 #define PQI_QUIESCE_WARNING_TIMEOUT_SECS                10
 396
 397 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 398 {
 399         unsigned long start_jiffies;
 400         unsigned long warning_timeout;
 401         bool displayed_warning;
 402
 403         displayed_warning = false;
 404         start_jiffies = jiffies;
 405         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
 406
 407         while (atomic_read(&ctrl_info->num_busy_threads) >
 408                 atomic_read(&ctrl_info->num_blocked_threads)) {
 409                 if (time_after(jiffies, warning_timeout)) {
 410                         dev_warn(&ctrl_info->pci_dev->dev,
 411                                 "waiting %u seconds for driver activity to quiesce\n",
 412                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 413                         displayed_warning = true;
 414                         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + jiffies;
 415                 }
 416                 usleep_range(1000, 2000);
 417         }
 418
 419         if (displayed_warning)
 420                 dev_warn(&ctrl_info->pci_dev->dev,
 421                         "driver activity quiesced after waiting for %u seconds\n",
 422                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 423 }
 424
 425 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 426 {
 427         return device->device_offline;
 428 }
 429
 430 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 431 {
 432         mutex_lock(&ctrl_info->ofa_mutex);
 433 }
 434
 435 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 436 {
 437         mutex_unlock(&ctrl_info->ofa_mutex);
 438 }
 439
 440 static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
 441 {
 442         mutex_lock(&ctrl_info->ofa_mutex);
 443         mutex_unlock(&ctrl_info->ofa_mutex);
 444 }
 445
 446 static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
 447 {
 448         return mutex_is_locked(&ctrl_info->ofa_mutex);
 449 }
 450
 451 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 452 {
 453         device->in_remove = true;
 454 }
 455
 456 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
 457 {
 458         return device->in_remove;
 459 }
 460
 461 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device, u8 lun)
 462 {
 463         device->in_reset[lun] = true;
 464 }
 465
 466 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device, u8 lun)
 467 {
 468         device->in_reset[lun] = false;
 469 }
 470
 471 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device, u8 lun)
 472 {
 473         return device->in_reset[lun];
 474 }
 475
 476 static inline int pqi_event_type_to_event_index(unsigned int event_type)
 477 {
 478         int index;
 479
 480         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
 481                 if (event_type == pqi_supported_event_types[index])
 482                         return index;
 483
 484         return -1;
 485 }
 486
 487 static inline bool pqi_is_supported_event(unsigned int event_type)
 488 {
 489         return pqi_event_type_to_event_index(event_type) != -1;
 490 }
 491
 492 static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
 493         unsigned long delay)
 494 {
 495         if (pqi_ctrl_offline(ctrl_info))
 496                 return;
 497
 498         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 499 }
 500
 501 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 502 {
 503         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 504 }
 505
 506 #define PQI_RESCAN_WORK_DELAY   (10 * HZ)
 507
 508 static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
 509 {
 510         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 511 }
 512
 513 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 514 {
 515         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 516 }
 517
 518 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 519 {
 520         if (!ctrl_info->heartbeat_counter)
 521                 return 0;
 522
 523         return readl(ctrl_info->heartbeat_counter);
 524 }
 525
 526 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 527 {
 528         return readb(ctrl_info->soft_reset_status);
 529 }
 530
 531 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 532 {
 533         u8 status;
 534
 535         status = pqi_read_soft_reset_status(ctrl_info);
 536         status &= ~PQI_SOFT_RESET_ABORT;
 537         writeb(status, ctrl_info->soft_reset_status);
 538 }
 539
 540 static inline bool pqi_is_io_high_priority(struct pqi_scsi_dev *device, struct scsi_cmnd *scmd)
 541 {
 542         bool io_high_prio;
 543         int priority_class;
 544
 545         io_high_prio = false;
 546
 547         if (device->ncq_prio_enable) {
 548                 priority_class =
 549                         IOPRIO_PRIO_CLASS(req_get_ioprio(scsi_cmd_to_rq(scmd)));
 550                 if (priority_class == IOPRIO_CLASS_RT) {
 551                         /* Set NCQ priority for read/write commands. */
 552                         switch (scmd->cmnd[0]) {
 553                         case WRITE_16:
 554                         case READ_16:
 555                         case WRITE_12:
 556                         case READ_12:
 557                         case WRITE_10:
 558                         case READ_10:
 559                         case WRITE_6:
 560                         case READ_6:
 561                                 io_high_prio = true;
 562                                 break;
 563                         }
 564                 }
 565         }
 566
 567         return io_high_prio;
 568 }
 569
 570 static int pqi_map_single(struct pci_dev *pci_dev,
 571         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 572         size_t buffer_length, enum dma_data_direction data_direction)
 573 {
 574         dma_addr_t bus_address;
 575
 576         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 577                 return 0;
 578
 579         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 580                 data_direction);
 581         if (dma_mapping_error(&pci_dev->dev, bus_address))
 582                 return -ENOMEM;
 583
 584         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 585         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 586         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 587
 588         return 0;
 589 }
 590
 591 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 592         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 593         enum dma_data_direction data_direction)
 594 {
 595         int i;
 596
 597         if (data_direction == DMA_NONE)
 598                 return;
 599
 600         for (i = 0; i < num_descriptors; i++)
 601                 dma_unmap_single(&pci_dev->dev,
 602                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 603                         get_unaligned_le32(&descriptors[i].length),
 604                         data_direction);
 605 }
 606
 607 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 608         struct pqi_raid_path_request *request, u8 cmd,
 609         u8 *scsi3addr, void *buffer, size_t buffer_length,
 610         u16 vpd_page, enum dma_data_direction *dir)
 611 {
 612         u8 *cdb;
 613         size_t cdb_length = buffer_length;
 614
 615         memset(request, 0, sizeof(*request));
 616
 617         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 618         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 619                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 620                 &request->header.iu_length);
 621         put_unaligned_le32(buffer_length, &request->buffer_length);
 622         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 623         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 624         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 625
 626         cdb = request->cdb;
 627
 628         switch (cmd) {
 629         case INQUIRY:
 630                 request->data_direction = SOP_READ_FLAG;
 631                 cdb[0] = INQUIRY;
 632                 if (vpd_page & VPD_PAGE) {
 633                         cdb[1] = 0x1;
 634                         cdb[2] = (u8)vpd_page;
 635                 }
 636                 cdb[4] = (u8)cdb_length;
 637                 break;
 638         case CISS_REPORT_LOG:
 639         case CISS_REPORT_PHYS:
 640                 request->data_direction = SOP_READ_FLAG;
 641                 cdb[0] = cmd;
 642                 if (cmd == CISS_REPORT_PHYS) {
 643                         if (ctrl_info->rpl_extended_format_4_5_supported)
 644                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
 645                         else
 646                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
 647                 } else {
 648                         cdb[1] = ctrl_info->ciss_report_log_flags;
 649                 }
 650                 put_unaligned_be32(cdb_length, &cdb[6]);
 651                 break;
 652         case CISS_GET_RAID_MAP:
 653                 request->data_direction = SOP_READ_FLAG;
 654                 cdb[0] = CISS_READ;
 655                 cdb[1] = CISS_GET_RAID_MAP;
 656                 put_unaligned_be32(cdb_length, &cdb[6]);
 657                 break;
 658         case SA_FLUSH_CACHE:
 659                 request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
 660                 request->data_direction = SOP_WRITE_FLAG;
 661                 cdb[0] = BMIC_WRITE;
 662                 cdb[6] = BMIC_FLUSH_CACHE;
 663                 put_unaligned_be16(cdb_length, &cdb[7]);
 664                 break;
 665         case BMIC_SENSE_DIAG_OPTIONS:
 666                 cdb_length = 0;
 667                 fallthrough;
 668         case BMIC_IDENTIFY_CONTROLLER:
 669         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 670         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 671         case BMIC_SENSE_FEATURE:
 672                 request->data_direction = SOP_READ_FLAG;
 673                 cdb[0] = BMIC_READ;
 674                 cdb[6] = cmd;
 675                 put_unaligned_be16(cdb_length, &cdb[7]);
 676                 break;
 677         case BMIC_SET_DIAG_OPTIONS:
 678                 cdb_length = 0;
 679                 fallthrough;
 680         case BMIC_WRITE_HOST_WELLNESS:
 681                 request->data_direction = SOP_WRITE_FLAG;
 682                 cdb[0] = BMIC_WRITE;
 683                 cdb[6] = cmd;
 684                 put_unaligned_be16(cdb_length, &cdb[7]);
 685                 break;
 686         case BMIC_CSMI_PASSTHRU:
 687                 request->data_direction = SOP_BIDIRECTIONAL;
 688                 cdb[0] = BMIC_WRITE;
 689                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 690                 cdb[6] = cmd;
 691                 put_unaligned_be16(cdb_length, &cdb[7]);
 692                 break;
 693         default:
 694                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
 695                 break;
 696         }
 697
 698         switch (request->data_direction) {
 699         case SOP_READ_FLAG:
 700                 *dir = DMA_FROM_DEVICE;
 701                 break;
 702         case SOP_WRITE_FLAG:
 703                 *dir = DMA_TO_DEVICE;
 704                 break;
 705         case SOP_NO_DIRECTION_FLAG:
 706                 *dir = DMA_NONE;
 707                 break;
 708         default:
 709                 *dir = DMA_BIDIRECTIONAL;
 710                 break;
 711         }
 712
 713         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 714                 buffer, buffer_length, *dir);
 715 }
 716
 717 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 718 {
 719         io_request->scmd = NULL;
 720         io_request->status = 0;
 721         io_request->error_info = NULL;
 722         io_request->raid_bypass = false;
 723 }
 724
 725 static inline struct pqi_io_request *pqi_alloc_io_request(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
 726 {
 727         struct pqi_io_request *io_request;
 728         u16 i;
 729
 730         if (scmd) { /* SML I/O request */
 731                 u32 blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
 732
 733                 i = blk_mq_unique_tag_to_tag(blk_tag);
 734                 io_request = &ctrl_info->io_request_pool[i];
 735                 if (atomic_inc_return(&io_request->refcount) > 1) {
 736                         atomic_dec(&io_request->refcount);
 737                         return NULL;
 738                 }
 739         } else { /* IOCTL or driver internal request */
 740                 /*
 741                  * benignly racy - may have to wait for an open slot.
 742                  * command slot range is scsi_ml_can_queue -
 743                  *         [scsi_ml_can_queue + (PQI_RESERVED_IO_SLOTS - 1)]
 744                  */
 745                 i = 0;
 746                 while (1) {
 747                         io_request = &ctrl_info->io_request_pool[ctrl_info->scsi_ml_can_queue + i];
 748                         if (atomic_inc_return(&io_request->refcount) == 1)
 749                                 break;
 750                         atomic_dec(&io_request->refcount);
 751                         i = (i + 1) % PQI_RESERVED_IO_SLOTS;
 752                 }
 753         }
 754
 755         if (io_request)
 756                 pqi_reinit_io_request(io_request);
 757
 758         return io_request;
 759 }
 760
 761 static void pqi_free_io_request(struct pqi_io_request *io_request)
 762 {
 763         atomic_dec(&io_request->refcount);
 764 }
 765
 766 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 767         u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 768         struct pqi_raid_error_info *error_info)
 769 {
 770         int rc;
 771         struct pqi_raid_path_request request;
 772         enum dma_data_direction dir;
 773
 774         rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
 775                 buffer, buffer_length, vpd_page, &dir);
 776         if (rc)
 777                 return rc;
 778
 779         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
 780
 781         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 782
 783         return rc;
 784 }
 785
 786 /* helper functions for pqi_send_scsi_raid_request */
 787
 788 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 789         u8 cmd, void *buffer, size_t buffer_length)
 790 {
 791         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 792                 buffer, buffer_length, 0, NULL);
 793 }
 794
 795 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 796         u8 cmd, void *buffer, size_t buffer_length,
 797         struct pqi_raid_error_info *error_info)
 798 {
 799         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 800                 buffer, buffer_length, 0, error_info);
 801 }
 802
 803 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 804         struct bmic_identify_controller *buffer)
 805 {
 806         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 807                 buffer, sizeof(*buffer));
 808 }
 809
 810 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 811         struct bmic_sense_subsystem_info *sense_info)
 812 {
 813         return pqi_send_ctrl_raid_request(ctrl_info,
 814                 BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
 815                 sizeof(*sense_info));
 816 }
 817
 818 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 819         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 820 {
 821         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 822                 buffer, buffer_length, vpd_page, NULL);
 823 }
 824
 825 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 826         struct pqi_scsi_dev *device,
 827         struct bmic_identify_physical_device *buffer, size_t buffer_length)
 828 {
 829         int rc;
 830         enum dma_data_direction dir;
 831         u16 bmic_device_index;
 832         struct pqi_raid_path_request request;
 833
 834         rc = pqi_build_raid_path_request(ctrl_info, &request,
 835                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 836                 buffer_length, 0, &dir);
 837         if (rc)
 838                 return rc;
 839
 840         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 841         request.cdb[2] = (u8)bmic_device_index;
 842         request.cdb[9] = (u8)(bmic_device_index >> 8);
 843
 844         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 845
 846         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 847
 848         return rc;
 849 }
 850
 851 static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
 852 {
 853         u32 bytes;
 854
 855         bytes = get_unaligned_le16(limit);
 856         if (bytes == 0)
 857                 bytes = ~0;
 858         else
 859                 bytes *= 1024;
 860
 861         return bytes;
 862 }
 863
 864 #pragma pack(1)
 865
 866 struct bmic_sense_feature_buffer {
 867         struct bmic_sense_feature_buffer_header header;
 868         struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
 869 };
 870
 871 #pragma pack()
 872
 873 #define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH       \
 874         offsetofend(struct bmic_sense_feature_buffer, \
 875                 aio_subpage.max_write_raid_1_10_3drive)
 876
 877 #define MINIMUM_AIO_SUBPAGE_LENGTH      \
 878         (offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
 879                 max_write_raid_1_10_3drive) - \
 880                 sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
 881
 882 static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
 883 {
 884         int rc;
 885         enum dma_data_direction dir;
 886         struct pqi_raid_path_request request;
 887         struct bmic_sense_feature_buffer *buffer;
 888
 889         buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
 890         if (!buffer)
 891                 return -ENOMEM;
 892
 893         rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
 894                 buffer, sizeof(*buffer), 0, &dir);
 895         if (rc)
 896                 goto error;
 897
 898         request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
 899         request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
 900
 901         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 902
 903         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 904
 905         if (rc)
 906                 goto error;
 907
 908         if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
 909                 buffer->header.subpage_code !=
 910                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 911                 get_unaligned_le16(&buffer->header.buffer_length) <
 912                         MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
 913                 buffer->aio_subpage.header.page_code !=
 914                         BMIC_SENSE_FEATURE_IO_PAGE ||
 915                 buffer->aio_subpage.header.subpage_code !=
 916                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 917                 get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
 918                         MINIMUM_AIO_SUBPAGE_LENGTH) {
 919                 goto error;
 920         }
 921
 922         ctrl_info->max_transfer_encrypted_sas_sata =
 923                 pqi_aio_limit_to_bytes(
 924                         &buffer->aio_subpage.max_transfer_encrypted_sas_sata);
 925
 926         ctrl_info->max_transfer_encrypted_nvme =
 927                 pqi_aio_limit_to_bytes(
 928                         &buffer->aio_subpage.max_transfer_encrypted_nvme);
 929
 930         ctrl_info->max_write_raid_5_6 =
 931                 pqi_aio_limit_to_bytes(
 932                         &buffer->aio_subpage.max_write_raid_5_6);
 933
 934         ctrl_info->max_write_raid_1_10_2drive =
 935                 pqi_aio_limit_to_bytes(
 936                         &buffer->aio_subpage.max_write_raid_1_10_2drive);
 937
 938         ctrl_info->max_write_raid_1_10_3drive =
 939                 pqi_aio_limit_to_bytes(
 940                         &buffer->aio_subpage.max_write_raid_1_10_3drive);
 941
 942 error:
 943         kfree(buffer);
 944
 945         return rc;
 946 }
 947
 948 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 949         enum bmic_flush_cache_shutdown_event shutdown_event)
 950 {
 951         int rc;
 952         struct bmic_flush_cache *flush_cache;
 953
 954         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 955         if (!flush_cache)
 956                 return -ENOMEM;
 957
 958         flush_cache->shutdown_event = shutdown_event;
 959
 960         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 961                 sizeof(*flush_cache));
 962
 963         kfree(flush_cache);
 964
 965         return rc;
 966 }
 967
 968 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 969         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 970         struct pqi_raid_error_info *error_info)
 971 {
 972         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 973                 buffer, buffer_length, error_info);
 974 }
 975
 976 #define PQI_FETCH_PTRAID_DATA           (1 << 31)
 977
 978 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 979 {
 980         int rc;
 981         struct bmic_diag_options *diag;
 982
 983         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 984         if (!diag)
 985                 return -ENOMEM;
 986
 987         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 988                 diag, sizeof(*diag));
 989         if (rc)
 990                 goto out;
 991
 992         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 993
 994         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
 995                 sizeof(*diag));
 996
 997 out:
 998         kfree(diag);
 999
1000         return rc;
1001 }
1002
1003 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
1004         void *buffer, size_t buffer_length)
1005 {
1006         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
1007                 buffer, buffer_length);
1008 }
1009
1010 #pragma pack(1)
1011
1012 struct bmic_host_wellness_driver_version {
1013         u8      start_tag[4];
1014         u8      driver_version_tag[2];
1015         __le16  driver_version_length;
1016         char    driver_version[32];
1017         u8      dont_write_tag[2];
1018         u8      end_tag[2];
1019 };
1020
1021 #pragma pack()
1022
1023 static int pqi_write_driver_version_to_host_wellness(
1024         struct pqi_ctrl_info *ctrl_info)
1025 {
1026         int rc;
1027         struct bmic_host_wellness_driver_version *buffer;
1028         size_t buffer_length;
1029
1030         buffer_length = sizeof(*buffer);
1031
1032         buffer = kmalloc(buffer_length, GFP_KERNEL);
1033         if (!buffer)
1034                 return -ENOMEM;
1035
1036         buffer->start_tag[0] = '<';
1037         buffer->start_tag[1] = 'H';
1038         buffer->start_tag[2] = 'W';
1039         buffer->start_tag[3] = '>';
1040         buffer->driver_version_tag[0] = 'D';
1041         buffer->driver_version_tag[1] = 'V';
1042         put_unaligned_le16(sizeof(buffer->driver_version),
1043                 &buffer->driver_version_length);
1044         strscpy(buffer->driver_version, "Linux " DRIVER_VERSION,
1045                 sizeof(buffer->driver_version));
1046         buffer->dont_write_tag[0] = 'D';
1047         buffer->dont_write_tag[1] = 'W';
1048         buffer->end_tag[0] = 'Z';
1049         buffer->end_tag[1] = 'Z';
1050
1051         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1052
1053         kfree(buffer);
1054
1055         return rc;
1056 }
1057
1058 #pragma pack(1)
1059
1060 struct bmic_host_wellness_time {
1061         u8      start_tag[4];
1062         u8      time_tag[2];
1063         __le16  time_length;
1064         u8      time[8];
1065         u8      dont_write_tag[2];
1066         u8      end_tag[2];
1067 };
1068
1069 #pragma pack()
1070
1071 static int pqi_write_current_time_to_host_wellness(
1072         struct pqi_ctrl_info *ctrl_info)
1073 {
1074         int rc;
1075         struct bmic_host_wellness_time *buffer;
1076         size_t buffer_length;
1077         time64_t local_time;
1078         unsigned int year;
1079         struct tm tm;
1080
1081         buffer_length = sizeof(*buffer);
1082
1083         buffer = kmalloc(buffer_length, GFP_KERNEL);
1084         if (!buffer)
1085                 return -ENOMEM;
1086
1087         buffer->start_tag[0] = '<';
1088         buffer->start_tag[1] = 'H';
1089         buffer->start_tag[2] = 'W';
1090         buffer->start_tag[3] = '>';
1091         buffer->time_tag[0] = 'T';
1092         buffer->time_tag[1] = 'D';
1093         put_unaligned_le16(sizeof(buffer->time),
1094                 &buffer->time_length);
1095
1096         local_time = ktime_get_real_seconds();
1097         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
1098         year = tm.tm_year + 1900;
1099
1100         buffer->time[0] = bin2bcd(tm.tm_hour);
1101         buffer->time[1] = bin2bcd(tm.tm_min);
1102         buffer->time[2] = bin2bcd(tm.tm_sec);
1103         buffer->time[3] = 0;
1104         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
1105         buffer->time[5] = bin2bcd(tm.tm_mday);
1106         buffer->time[6] = bin2bcd(year / 100);
1107         buffer->time[7] = bin2bcd(year % 100);
1108
1109         buffer->dont_write_tag[0] = 'D';
1110         buffer->dont_write_tag[1] = 'W';
1111         buffer->end_tag[0] = 'Z';
1112         buffer->end_tag[1] = 'Z';
1113
1114         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1115
1116         kfree(buffer);
1117
1118         return rc;
1119 }
1120
1121 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
1122
1123 static void pqi_update_time_worker(struct work_struct *work)
1124 {
1125         int rc;
1126         struct pqi_ctrl_info *ctrl_info;
1127
1128         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1129                 update_time_work);
1130
1131         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
1132         if (rc)
1133                 dev_warn(&ctrl_info->pci_dev->dev,
1134                         "error updating time on controller\n");
1135
1136         schedule_delayed_work(&ctrl_info->update_time_work,
1137                 PQI_UPDATE_TIME_WORK_INTERVAL);
1138 }
1139
1140 static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1141 {
1142         schedule_delayed_work(&ctrl_info->update_time_work, 0);
1143 }
1144
1145 static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1146 {
1147         cancel_delayed_work_sync(&ctrl_info->update_time_work);
1148 }
1149
1150 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
1151         size_t buffer_length)
1152 {
1153         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
1154 }
1155
1156 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
1157 {
1158         int rc;
1159         size_t lun_list_length;
1160         size_t lun_data_length;
1161         size_t new_lun_list_length;
1162         void *lun_data = NULL;
1163         struct report_lun_header *report_lun_header;
1164
1165         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
1166         if (!report_lun_header) {
1167                 rc = -ENOMEM;
1168                 goto out;
1169         }
1170
1171         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
1172         if (rc)
1173                 goto out;
1174
1175         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
1176
1177 again:
1178         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
1179
1180         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
1181         if (!lun_data) {
1182                 rc = -ENOMEM;
1183                 goto out;
1184         }
1185
1186         if (lun_list_length == 0) {
1187                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
1188                 goto out;
1189         }
1190
1191         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
1192         if (rc)
1193                 goto out;
1194
1195         new_lun_list_length =
1196                 get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
1197
1198         if (new_lun_list_length > lun_list_length) {
1199                 lun_list_length = new_lun_list_length;
1200                 kfree(lun_data);
1201                 goto again;
1202         }
1203
1204 out:
1205         kfree(report_lun_header);
1206
1207         if (rc) {
1208                 kfree(lun_data);
1209                 lun_data = NULL;
1210         }
1211
1212         *buffer = lun_data;
1213
1214         return rc;
1215 }
1216
1217 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1218 {
1219         int rc;
1220         unsigned int i;
1221         u8 rpl_response_format;
1222         u32 num_physicals;
1223         void *rpl_list;
1224         struct report_lun_header *rpl_header;
1225         struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
1226         struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
1227
1228         rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
1229         if (rc)
1230                 return rc;
1231
1232         if (ctrl_info->rpl_extended_format_4_5_supported) {
1233                 rpl_header = rpl_list;
1234                 rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
1235                 if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
1236                         *buffer = rpl_list;
1237                         return 0;
1238                 } else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
1239                         dev_err(&ctrl_info->pci_dev->dev,
1240                                 "RPL returned unsupported data format %u\n",
1241                                 rpl_response_format);
1242                         return -EINVAL;
1243                 } else {
1244                         dev_warn(&ctrl_info->pci_dev->dev,
1245                                 "RPL returned extended format 2 instead of 4\n");
1246                 }
1247         }
1248
1249         rpl_8byte_wwid_list = rpl_list;
1250         num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
1251
1252         rpl_16byte_wwid_list = kmalloc(struct_size(rpl_16byte_wwid_list, lun_entries,
1253                                                    num_physicals), GFP_KERNEL);
1254         if (!rpl_16byte_wwid_list)
1255                 return -ENOMEM;
1256
1257         put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
1258                 &rpl_16byte_wwid_list->header.list_length);
1259         rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
1260
1261         for (i = 0; i < num_physicals; i++) {
1262                 memcpy(&rpl_16byte_wwid_list->lun_entries[i].lunid, &rpl_8byte_wwid_list->lun_entries[i].lunid, sizeof(rpl_8byte_wwid_list->lun_entries[i].lunid));
1263                 memcpy(&rpl_16byte_wwid_list->lun_entries[i].wwid[0], &rpl_8byte_wwid_list->lun_entries[i].wwid, sizeof(rpl_8byte_wwid_list->lun_entries[i].wwid));
1264                 memset(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], 0, 8);
1265                 rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
1266                 rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
1267                 rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
1268                 rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
1269                 rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
1270         }
1271
1272         kfree(rpl_8byte_wwid_list);
1273         *buffer = rpl_16byte_wwid_list;
1274
1275         return 0;
1276 }
1277
1278 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1279 {
1280         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1281 }
1282
1283 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1284         struct report_phys_lun_16byte_wwid_list **physdev_list,
1285         struct report_log_lun_list **logdev_list)
1286 {
1287         int rc;
1288         size_t logdev_list_length;
1289         size_t logdev_data_length;
1290         struct report_log_lun_list *internal_logdev_list;
1291         struct report_log_lun_list *logdev_data;
1292         struct report_lun_header report_lun_header;
1293
1294         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1295         if (rc)
1296                 dev_err(&ctrl_info->pci_dev->dev,
1297                         "report physical LUNs failed\n");
1298
1299         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1300         if (rc)
1301                 dev_err(&ctrl_info->pci_dev->dev,
1302                         "report logical LUNs failed\n");
1303
1304         /*
1305          * Tack the controller itself onto the end of the logical device list
1306          * by adding a list entry that is all zeros.
1307          */
1308
1309         logdev_data = *logdev_list;
1310
1311         if (logdev_data) {
1312                 logdev_list_length =
1313                         get_unaligned_be32(&logdev_data->header.list_length);
1314         } else {
1315                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1316                 logdev_data =
1317                         (struct report_log_lun_list *)&report_lun_header;
1318                 logdev_list_length = 0;
1319         }
1320
1321         logdev_data_length = sizeof(struct report_lun_header) +
1322                 logdev_list_length;
1323
1324         internal_logdev_list = kmalloc(logdev_data_length +
1325                 sizeof(struct report_log_lun), GFP_KERNEL);
1326         if (!internal_logdev_list) {
1327                 kfree(*logdev_list);
1328                 *logdev_list = NULL;
1329                 return -ENOMEM;
1330         }
1331
1332         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1333         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1334                 sizeof(struct report_log_lun));
1335         put_unaligned_be32(logdev_list_length +
1336                 sizeof(struct report_log_lun),
1337                 &internal_logdev_list->header.list_length);
1338
1339         kfree(*logdev_list);
1340         *logdev_list = internal_logdev_list;
1341
1342         return 0;
1343 }
1344
1345 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1346         int bus, int target, int lun)
1347 {
1348         device->bus = bus;
1349         device->target = target;
1350         device->lun = lun;
1351 }
1352
1353 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1354 {
1355         u8 *scsi3addr;
1356         u32 lunid;
1357         int bus;
1358         int target;
1359         int lun;
1360
1361         scsi3addr = device->scsi3addr;
1362         lunid = get_unaligned_le32(scsi3addr);
1363
1364         if (pqi_is_hba_lunid(scsi3addr)) {
1365                 /* The specified device is the controller. */
1366                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1367                 device->target_lun_valid = true;
1368                 return;
1369         }
1370
1371         if (pqi_is_logical_device(device)) {
1372                 if (device->is_external_raid_device) {
1373                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1374                         target = (lunid >> 16) & 0x3fff;
1375                         lun = lunid & 0xff;
1376                 } else {
1377                         bus = PQI_RAID_VOLUME_BUS;
1378                         target = 0;
1379                         lun = lunid & 0x3fff;
1380                 }
1381                 pqi_set_bus_target_lun(device, bus, target, lun);
1382                 device->target_lun_valid = true;
1383                 return;
1384         }
1385
1386         /*
1387          * Defer target and LUN assignment for non-controller physical devices
1388          * because the SAS transport layer will make these assignments later.
1389          */
1390         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1391 }
1392
1393 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1394         struct pqi_scsi_dev *device)
1395 {
1396         int rc;
1397         u8 raid_level;
1398         u8 *buffer;
1399
1400         raid_level = SA_RAID_UNKNOWN;
1401
1402         buffer = kmalloc(64, GFP_KERNEL);
1403         if (buffer) {
1404                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1405                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1406                 if (rc == 0) {
1407                         raid_level = buffer[8];
1408                         if (raid_level > SA_RAID_MAX)
1409                                 raid_level = SA_RAID_UNKNOWN;
1410                 }
1411                 kfree(buffer);
1412         }
1413
1414         device->raid_level = raid_level;
1415 }
1416
1417 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1418         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1419 {
1420         char *err_msg;
1421         u32 raid_map_size;
1422         u32 r5or6_blocks_per_row;
1423
1424         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1425
1426         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1427                 err_msg = "RAID map too small";
1428                 goto bad_raid_map;
1429         }
1430
1431         if (device->raid_level == SA_RAID_1) {
1432                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1433                         err_msg = "invalid RAID-1 map";
1434                         goto bad_raid_map;
1435                 }
1436         } else if (device->raid_level == SA_RAID_TRIPLE) {
1437                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1438                         err_msg = "invalid RAID-1(Triple) map";
1439                         goto bad_raid_map;
1440                 }
1441         } else if ((device->raid_level == SA_RAID_5 ||
1442                 device->raid_level == SA_RAID_6) &&
1443                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1444                 /* RAID 50/60 */
1445                 r5or6_blocks_per_row =
1446                         get_unaligned_le16(&raid_map->strip_size) *
1447                         get_unaligned_le16(&raid_map->data_disks_per_row);
1448                 if (r5or6_blocks_per_row == 0) {
1449                         err_msg = "invalid RAID-5 or RAID-6 map";
1450                         goto bad_raid_map;
1451                 }
1452         }
1453
1454         return 0;
1455
1456 bad_raid_map:
1457         dev_warn(&ctrl_info->pci_dev->dev,
1458                 "logical device %08x%08x %s\n",
1459                 *((u32 *)&device->scsi3addr),
1460                 *((u32 *)&device->scsi3addr[4]), err_msg);
1461
1462         return -EINVAL;
1463 }
1464
1465 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1466         struct pqi_scsi_dev *device)
1467 {
1468         int rc;
1469         u32 raid_map_size;
1470         struct raid_map *raid_map;
1471
1472         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1473         if (!raid_map)
1474                 return -ENOMEM;
1475
1476         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1477                 device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
1478         if (rc)
1479                 goto error;
1480
1481         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1482
1483         if (raid_map_size > sizeof(*raid_map)) {
1484
1485                 kfree(raid_map);
1486
1487                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1488                 if (!raid_map)
1489                         return -ENOMEM;
1490
1491                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1492                         device->scsi3addr, raid_map, raid_map_size, 0, NULL);
1493                 if (rc)
1494                         goto error;
1495
1496                 if (get_unaligned_le32(&raid_map->structure_size)
1497                         != raid_map_size) {
1498                         dev_warn(&ctrl_info->pci_dev->dev,
1499                                 "requested %u bytes, received %u bytes\n",
1500                                 raid_map_size,
1501                                 get_unaligned_le32(&raid_map->structure_size));
1502                         rc = -EINVAL;
1503                         goto error;
1504                 }
1505         }
1506
1507         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1508         if (rc)
1509                 goto error;
1510
1511         device->raid_map = raid_map;
1512
1513         return 0;
1514
1515 error:
1516         kfree(raid_map);
1517
1518         return rc;
1519 }
1520
1521 static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
1522         struct pqi_scsi_dev *device)
1523 {
1524         if (!ctrl_info->lv_drive_type_mix_valid) {
1525                 device->max_transfer_encrypted = ~0;
1526                 return;
1527         }
1528
1529         switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
1530         case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
1531         case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
1532         case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
1533         case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
1534         case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
1535         case LV_DRIVE_TYPE_MIX_SAS_ONLY:
1536         case LV_DRIVE_TYPE_MIX_SATA_ONLY:
1537                 device->max_transfer_encrypted =
1538                         ctrl_info->max_transfer_encrypted_sas_sata;
1539                 break;
1540         case LV_DRIVE_TYPE_MIX_NVME_ONLY:
1541                 device->max_transfer_encrypted =
1542                         ctrl_info->max_transfer_encrypted_nvme;
1543                 break;
1544         case LV_DRIVE_TYPE_MIX_UNKNOWN:
1545         case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
1546         default:
1547                 device->max_transfer_encrypted =
1548                         min(ctrl_info->max_transfer_encrypted_sas_sata,
1549                                 ctrl_info->max_transfer_encrypted_nvme);
1550                 break;
1551         }
1552 }
1553
1554 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1555         struct pqi_scsi_dev *device)
1556 {
1557         int rc;
1558         u8 *buffer;
1559         u8 bypass_status;
1560
1561         buffer = kmalloc(64, GFP_KERNEL);
1562         if (!buffer)
1563                 return;
1564
1565         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1566                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1567         if (rc)
1568                 goto out;
1569
1570 #define RAID_BYPASS_STATUS              4
1571 #define RAID_BYPASS_CONFIGURED          0x1
1572 #define RAID_BYPASS_ENABLED             0x2
1573
1574         bypass_status = buffer[RAID_BYPASS_STATUS];
1575         device->raid_bypass_configured =
1576                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1577         if (device->raid_bypass_configured &&
1578                 (bypass_status & RAID_BYPASS_ENABLED) &&
1579                 pqi_get_raid_map(ctrl_info, device) == 0) {
1580                 device->raid_bypass_enabled = true;
1581                 if (get_unaligned_le16(&device->raid_map->flags) &
1582                         RAID_MAP_ENCRYPTION_ENABLED)
1583                         pqi_set_max_transfer_encrypted(ctrl_info, device);
1584         }
1585
1586 out:
1587         kfree(buffer);
1588 }
1589
1590 /*
1591  * Use vendor-specific VPD to determine online/offline status of a volume.
1592  */
1593
1594 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1595         struct pqi_scsi_dev *device)
1596 {
1597         int rc;
1598         size_t page_length;
1599         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1600         bool volume_offline = true;
1601         u32 volume_flags;
1602         struct ciss_vpd_logical_volume_status *vpd;
1603
1604         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1605         if (!vpd)
1606                 goto no_buffer;
1607
1608         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1609                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1610         if (rc)
1611                 goto out;
1612
1613         if (vpd->page_code != CISS_VPD_LV_STATUS)
1614                 goto out;
1615
1616         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1617                 volume_status) + vpd->page_length;
1618         if (page_length < sizeof(*vpd))
1619                 goto out;
1620
1621         volume_status = vpd->volume_status;
1622         volume_flags = get_unaligned_be32(&vpd->flags);
1623         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1624
1625 out:
1626         kfree(vpd);
1627 no_buffer:
1628         device->volume_status = volume_status;
1629         device->volume_offline = volume_offline;
1630 }
1631
1632 #define PQI_DEVICE_NCQ_PRIO_SUPPORTED   0x01
1633 #define PQI_DEVICE_PHY_MAP_SUPPORTED    0x10
1634 #define PQI_DEVICE_ERASE_IN_PROGRESS    0x10
1635
1636 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1637         struct pqi_scsi_dev *device,
1638         struct bmic_identify_physical_device *id_phys)
1639 {
1640         int rc;
1641
1642         memset(id_phys, 0, sizeof(*id_phys));
1643
1644         rc = pqi_identify_physical_device(ctrl_info, device,
1645                 id_phys, sizeof(*id_phys));
1646         if (rc) {
1647                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1648                 return rc;
1649         }
1650
1651         scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1652         scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1653
1654         memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1655         memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1656
1657         device->box_index = id_phys->box_index;
1658         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1659         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1660         device->queue_depth =
1661                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1662         device->active_path_index = id_phys->active_path_number;
1663         device->path_map = id_phys->redundant_path_present_map;
1664         memcpy(&device->box,
1665                 &id_phys->alternate_paths_phys_box_on_port,
1666                 sizeof(device->box));
1667         memcpy(&device->phys_connector,
1668                 &id_phys->alternate_paths_phys_connector,
1669                 sizeof(device->phys_connector));
1670         device->bay = id_phys->phys_bay_in_box;
1671         device->lun_count = id_phys->multi_lun_device_lun_count;
1672         if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
1673                 id_phys->phy_count)
1674                 device->phy_id =
1675                         id_phys->phy_to_phy_map[device->active_path_index];
1676         else
1677                 device->phy_id = 0xFF;
1678
1679         device->ncq_prio_support =
1680                 ((get_unaligned_le32(&id_phys->misc_drive_flags) >> 16) &
1681                 PQI_DEVICE_NCQ_PRIO_SUPPORTED);
1682
1683         device->erase_in_progress = !!(get_unaligned_le16(&id_phys->extra_physical_drive_flags) & PQI_DEVICE_ERASE_IN_PROGRESS);
1684
1685         return 0;
1686 }
1687
1688 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1689         struct pqi_scsi_dev *device)
1690 {
1691         int rc;
1692         u8 *buffer;
1693
1694         buffer = kmalloc(64, GFP_KERNEL);
1695         if (!buffer)
1696                 return -ENOMEM;
1697
1698         /* Send an inquiry to the device to see what it is. */
1699         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1700         if (rc)
1701                 goto out;
1702
1703         scsi_sanitize_inquiry_string(&buffer[8], 8);
1704         scsi_sanitize_inquiry_string(&buffer[16], 16);
1705
1706         device->devtype = buffer[0] & 0x1f;
1707         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1708         memcpy(device->model, &buffer[16], sizeof(device->model));
1709
1710         if (device->devtype == TYPE_DISK) {
1711                 if (device->is_external_raid_device) {
1712                         device->raid_level = SA_RAID_UNKNOWN;
1713                         device->volume_status = CISS_LV_OK;
1714                         device->volume_offline = false;
1715                 } else {
1716                         pqi_get_raid_level(ctrl_info, device);
1717                         pqi_get_raid_bypass_status(ctrl_info, device);
1718                         pqi_get_volume_status(ctrl_info, device);
1719                 }
1720         }
1721
1722 out:
1723         kfree(buffer);
1724
1725         return rc;
1726 }
1727
1728 /*
1729  * Prevent adding drive to OS for some corner cases such as a drive
1730  * undergoing a sanitize (erase) operation. Some OSes will continue to poll
1731  * the drive until the sanitize completes, which can take hours,
1732  * resulting in long bootup delays. Commands such as TUR, READ_CAP
1733  * are allowed, but READ/WRITE cause check condition. So the OS
1734  * cannot check/read the partition table.
1735  * Note: devices that have completed sanitize must be re-enabled
1736  *       using the management utility.
1737  */
1738 static inline bool pqi_keep_device_offline(struct pqi_scsi_dev *device)
1739 {
1740         return device->erase_in_progress;
1741 }
1742
1743 static int pqi_get_device_info_phys_logical(struct pqi_ctrl_info *ctrl_info,
1744         struct pqi_scsi_dev *device,
1745         struct bmic_identify_physical_device *id_phys)
1746 {
1747         int rc;
1748
1749         if (device->is_expander_smp_device)
1750                 return 0;
1751
1752         if (pqi_is_logical_device(device))
1753                 rc = pqi_get_logical_device_info(ctrl_info, device);
1754         else
1755                 rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1756
1757         return rc;
1758 }
1759
1760 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1761         struct pqi_scsi_dev *device,
1762         struct bmic_identify_physical_device *id_phys)
1763 {
1764         int rc;
1765
1766         rc = pqi_get_device_info_phys_logical(ctrl_info, device, id_phys);
1767
1768         if (rc == 0 && device->lun_count == 0)
1769                 device->lun_count = 1;
1770
1771         return rc;
1772 }
1773
1774 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1775         struct pqi_scsi_dev *device)
1776 {
1777         char *status;
1778         static const char unknown_state_str[] =
1779                 "Volume is in an unknown state (%u)";
1780         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1781
1782         switch (device->volume_status) {
1783         case CISS_LV_OK:
1784                 status = "Volume online";
1785                 break;
1786         case CISS_LV_FAILED:
1787                 status = "Volume failed";
1788                 break;
1789         case CISS_LV_NOT_CONFIGURED:
1790                 status = "Volume not configured";
1791                 break;
1792         case CISS_LV_DEGRADED:
1793                 status = "Volume degraded";
1794                 break;
1795         case CISS_LV_READY_FOR_RECOVERY:
1796                 status = "Volume ready for recovery operation";
1797                 break;
1798         case CISS_LV_UNDERGOING_RECOVERY:
1799                 status = "Volume undergoing recovery";
1800                 break;
1801         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1802                 status = "Wrong physical drive was replaced";
1803                 break;
1804         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1805                 status = "A physical drive not properly connected";
1806                 break;
1807         case CISS_LV_HARDWARE_OVERHEATING:
1808                 status = "Hardware is overheating";
1809                 break;
1810         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1811                 status = "Hardware has overheated";
1812                 break;
1813         case CISS_LV_UNDERGOING_EXPANSION:
1814                 status = "Volume undergoing expansion";
1815                 break;
1816         case CISS_LV_NOT_AVAILABLE:
1817                 status = "Volume waiting for transforming volume";
1818                 break;
1819         case CISS_LV_QUEUED_FOR_EXPANSION:
1820                 status = "Volume queued for expansion";
1821                 break;
1822         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1823                 status = "Volume disabled due to SCSI ID conflict";
1824                 break;
1825         case CISS_LV_EJECTED:
1826                 status = "Volume has been ejected";
1827                 break;
1828         case CISS_LV_UNDERGOING_ERASE:
1829                 status = "Volume undergoing background erase";
1830                 break;
1831         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1832                 status = "Volume ready for predictive spare rebuild";
1833                 break;
1834         case CISS_LV_UNDERGOING_RPI:
1835                 status = "Volume undergoing rapid parity initialization";
1836                 break;
1837         case CISS_LV_PENDING_RPI:
1838                 status = "Volume queued for rapid parity initialization";
1839                 break;
1840         case CISS_LV_ENCRYPTED_NO_KEY:
1841                 status = "Encrypted volume inaccessible - key not present";
1842                 break;
1843         case CISS_LV_UNDERGOING_ENCRYPTION:
1844                 status = "Volume undergoing encryption process";
1845                 break;
1846         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1847                 status = "Volume undergoing encryption re-keying process";
1848                 break;
1849         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1850                 status = "Volume encrypted but encryption is disabled";
1851                 break;
1852         case CISS_LV_PENDING_ENCRYPTION:
1853                 status = "Volume pending migration to encrypted state";
1854                 break;
1855         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1856                 status = "Volume pending encryption rekeying";
1857                 break;
1858         case CISS_LV_NOT_SUPPORTED:
1859                 status = "Volume not supported on this controller";
1860                 break;
1861         case CISS_LV_STATUS_UNAVAILABLE:
1862                 status = "Volume status not available";
1863                 break;
1864         default:
1865                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1866                         unknown_state_str, device->volume_status);
1867                 status = unknown_state_buffer;
1868                 break;
1869         }
1870
1871         dev_info(&ctrl_info->pci_dev->dev,
1872                 "scsi %d:%d:%d:%d %s\n",
1873                 ctrl_info->scsi_host->host_no,
1874                 device->bus, device->target, device->lun, status);
1875 }
1876
1877 static void pqi_rescan_worker(struct work_struct *work)
1878 {
1879         struct pqi_ctrl_info *ctrl_info;
1880
1881         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1882                 rescan_work);
1883
1884         pqi_scan_scsi_devices(ctrl_info);
1885 }
1886
1887 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1888         struct pqi_scsi_dev *device)
1889 {
1890         int rc;
1891
1892         if (pqi_is_logical_device(device))
1893                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1894                         device->target, device->lun);
1895         else
1896                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1897
1898         return rc;
1899 }
1900
1901 #define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS      (20 * 1000)
1902
1903 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
1904 {
1905         int rc;
1906         int lun;
1907
1908         for (lun = 0; lun < device->lun_count; lun++) {
1909                 rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun,
1910                         PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
1911                 if (rc)
1912                         dev_err(&ctrl_info->pci_dev->dev,
1913                                 "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1914                                 ctrl_info->scsi_host->host_no, device->bus,
1915                                 device->target, lun,
1916                                 atomic_read(&device->scsi_cmds_outstanding[lun]));
1917         }
1918
1919         if (pqi_is_logical_device(device))
1920                 scsi_remove_device(device->sdev);
1921         else
1922                 pqi_remove_sas_device(device);
1923
1924         pqi_device_remove_start(device);
1925 }
1926
1927 /* Assumes the SCSI device list lock is held. */
1928
1929 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1930         int bus, int target, int lun)
1931 {
1932         struct pqi_scsi_dev *device;
1933
1934         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1935                 if (device->bus == bus && device->target == target && device->lun == lun)
1936                         return device;
1937
1938         return NULL;
1939 }
1940
1941 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
1942 {
1943         if (dev1->is_physical_device != dev2->is_physical_device)
1944                 return false;
1945
1946         if (dev1->is_physical_device)
1947                 return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
1948
1949         return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
1950 }
1951
1952 enum pqi_find_result {
1953         DEVICE_NOT_FOUND,
1954         DEVICE_CHANGED,
1955         DEVICE_SAME,
1956 };
1957
1958 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1959         struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1960 {
1961         struct pqi_scsi_dev *device;
1962
1963         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1964                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1965                         *matching_device = device;
1966                         if (pqi_device_equal(device_to_find, device)) {
1967                                 if (device_to_find->volume_offline)
1968                                         return DEVICE_CHANGED;
1969                                 return DEVICE_SAME;
1970                         }
1971                         return DEVICE_CHANGED;
1972                 }
1973         }
1974
1975         return DEVICE_NOT_FOUND;
1976 }
1977
1978 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1979 {
1980         if (device->is_expander_smp_device)
1981                 return "Enclosure SMP    ";
1982
1983         return scsi_device_type(device->devtype);
1984 }
1985
1986 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1987
1988 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1989         char *action, struct pqi_scsi_dev *device)
1990 {
1991         ssize_t count;
1992         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1993
1994         count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1995                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1996
1997         if (device->target_lun_valid)
1998                 count += scnprintf(buffer + count,
1999                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2000                         "%d:%d",
2001                         device->target,
2002                         device->lun);
2003         else
2004                 count += scnprintf(buffer + count,
2005                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2006                         "-:-");
2007
2008         if (pqi_is_logical_device(device))
2009                 count += scnprintf(buffer + count,
2010                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2011                         " %08x%08x",
2012                         *((u32 *)&device->scsi3addr),
2013                         *((u32 *)&device->scsi3addr[4]));
2014         else
2015                 count += scnprintf(buffer + count,
2016                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2017                         " %016llx%016llx",
2018                         get_unaligned_be64(&device->wwid[0]),
2019                         get_unaligned_be64(&device->wwid[8]));
2020
2021         count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
2022                 " %s %.8s %.16s ",
2023                 pqi_device_type(device),
2024                 device->vendor,
2025                 device->model);
2026
2027         if (pqi_is_logical_device(device)) {
2028                 if (device->devtype == TYPE_DISK)
2029                         count += scnprintf(buffer + count,
2030                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2031                                 "SSDSmartPathCap%c En%c %-12s",
2032                                 device->raid_bypass_configured ? '+' : '-',
2033                                 device->raid_bypass_enabled ? '+' : '-',
2034                                 pqi_raid_level_to_string(device->raid_level));
2035         } else {
2036                 count += scnprintf(buffer + count,
2037                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2038                         "AIO%c", device->aio_enabled ? '+' : '-');
2039                 if (device->devtype == TYPE_DISK ||
2040                         device->devtype == TYPE_ZBC)
2041                         count += scnprintf(buffer + count,
2042                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2043                                 " qd=%-6d", device->queue_depth);
2044         }
2045
2046         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
2047 }
2048
2049 static bool pqi_raid_maps_equal(struct raid_map *raid_map1, struct raid_map *raid_map2)
2050 {
2051         u32 raid_map1_size;
2052         u32 raid_map2_size;
2053
2054         if (raid_map1 == NULL || raid_map2 == NULL)
2055                 return raid_map1 == raid_map2;
2056
2057         raid_map1_size = get_unaligned_le32(&raid_map1->structure_size);
2058         raid_map2_size = get_unaligned_le32(&raid_map2->structure_size);
2059
2060         if (raid_map1_size != raid_map2_size)
2061                 return false;
2062
2063         return memcmp(raid_map1, raid_map2, raid_map1_size) == 0;
2064 }
2065
2066 /* Assumes the SCSI device list lock is held. */
2067
2068 static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info,
2069         struct pqi_scsi_dev *existing_device, struct pqi_scsi_dev *new_device)
2070 {
2071         existing_device->device_type = new_device->device_type;
2072         existing_device->bus = new_device->bus;
2073         if (new_device->target_lun_valid) {
2074                 existing_device->target = new_device->target;
2075                 existing_device->lun = new_device->lun;
2076                 existing_device->target_lun_valid = true;
2077         }
2078
2079         /* By definition, the scsi3addr and wwid fields are already the same. */
2080
2081         existing_device->is_physical_device = new_device->is_physical_device;
2082         memcpy(existing_device->vendor, new_device->vendor, sizeof(existing_device->vendor));
2083         memcpy(existing_device->model, new_device->model, sizeof(existing_device->model));
2084         existing_device->sas_address = new_device->sas_address;
2085         existing_device->queue_depth = new_device->queue_depth;
2086         existing_device->device_offline = false;
2087         existing_device->lun_count = new_device->lun_count;
2088
2089         if (pqi_is_logical_device(existing_device)) {
2090                 existing_device->is_external_raid_device = new_device->is_external_raid_device;
2091
2092                 if (existing_device->devtype == TYPE_DISK) {
2093                         existing_device->raid_level = new_device->raid_level;
2094                         existing_device->volume_status = new_device->volume_status;
2095                         memset(existing_device->next_bypass_group, 0, sizeof(existing_device->next_bypass_group));
2096                         if (!pqi_raid_maps_equal(existing_device->raid_map, new_device->raid_map)) {
2097                                 kfree(existing_device->raid_map);
2098                                 existing_device->raid_map = new_device->raid_map;
2099                                 /* To prevent this from being freed later. */
2100                                 new_device->raid_map = NULL;
2101                         }
2102                         existing_device->raid_bypass_configured = new_device->raid_bypass_configured;
2103                         existing_device->raid_bypass_enabled = new_device->raid_bypass_enabled;
2104                 }
2105         } else {
2106                 existing_device->aio_enabled = new_device->aio_enabled;
2107                 existing_device->aio_handle = new_device->aio_handle;
2108                 existing_device->is_expander_smp_device = new_device->is_expander_smp_device;
2109                 existing_device->active_path_index = new_device->active_path_index;
2110                 existing_device->phy_id = new_device->phy_id;
2111                 existing_device->path_map = new_device->path_map;
2112                 existing_device->bay = new_device->bay;
2113                 existing_device->box_index = new_device->box_index;
2114                 existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
2115                 existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
2116                 memcpy(existing_device->box, new_device->box, sizeof(existing_device->box));
2117                 memcpy(existing_device->phys_connector, new_device->phys_connector, sizeof(existing_device->phys_connector));
2118         }
2119 }
2120
2121 static inline void pqi_free_device(struct pqi_scsi_dev *device)
2122 {
2123         if (device) {
2124                 kfree(device->raid_map);
2125                 kfree(device);
2126         }
2127 }
2128
2129 /*
2130  * Called when exposing a new device to the OS fails in order to re-adjust
2131  * our internal SCSI device list to match the SCSI ML's view.
2132  */
2133
2134 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
2135         struct pqi_scsi_dev *device)
2136 {
2137         unsigned long flags;
2138
2139         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2140         list_del(&device->scsi_device_list_entry);
2141         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2142
2143         /* Allow the device structure to be freed later. */
2144         device->keep_device = false;
2145 }
2146
2147 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
2148 {
2149         if (device->is_expander_smp_device)
2150                 return device->sas_port != NULL;
2151
2152         return device->sdev != NULL;
2153 }
2154
2155 static inline void pqi_init_device_tmf_work(struct pqi_scsi_dev *device)
2156 {
2157         unsigned int lun;
2158         struct pqi_tmf_work *tmf_work;
2159
2160         for (lun = 0, tmf_work = device->tmf_work; lun < PQI_MAX_LUNS_PER_DEVICE; lun++, tmf_work++)
2161                 INIT_WORK(&tmf_work->work_struct, pqi_tmf_worker);
2162 }
2163
2164 static inline bool pqi_volume_rescan_needed(struct pqi_scsi_dev *device)
2165 {
2166         if (pqi_device_in_remove(device))
2167                 return false;
2168
2169         if (device->sdev == NULL)
2170                 return false;
2171
2172         if (!scsi_device_online(device->sdev))
2173                 return false;
2174
2175         return device->rescan;
2176 }
2177
2178 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
2179         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
2180 {
2181         int rc;
2182         unsigned int i;
2183         unsigned long flags;
2184         enum pqi_find_result find_result;
2185         struct pqi_scsi_dev *device;
2186         struct pqi_scsi_dev *next;
2187         struct pqi_scsi_dev *matching_device;
2188         LIST_HEAD(add_list);
2189         LIST_HEAD(delete_list);
2190
2191         /*
2192          * The idea here is to do as little work as possible while holding the
2193          * spinlock.  That's why we go to great pains to defer anything other
2194          * than updating the internal device list until after we release the
2195          * spinlock.
2196          */
2197
2198         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2199
2200         /* Assume that all devices in the existing list have gone away. */
2201         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
2202                 device->device_gone = true;
2203
2204         for (i = 0; i < num_new_devices; i++) {
2205                 device = new_device_list[i];
2206
2207                 find_result = pqi_scsi_find_entry(ctrl_info, device,
2208                         &matching_device);
2209
2210                 switch (find_result) {
2211                 case DEVICE_SAME:
2212                         /*
2213                          * The newly found device is already in the existing
2214                          * device list.
2215                          */
2216                         device->new_device = false;
2217                         matching_device->device_gone = false;
2218                         pqi_scsi_update_device(ctrl_info, matching_device, device);
2219                         break;
2220                 case DEVICE_NOT_FOUND:
2221                         /*
2222                          * The newly found device is NOT in the existing device
2223                          * list.
2224                          */
2225                         device->new_device = true;
2226                         break;
2227                 case DEVICE_CHANGED:
2228                         /*
2229                          * The original device has gone away and we need to add
2230                          * the new device.
2231                          */
2232                         device->new_device = true;
2233                         break;
2234                 }
2235         }
2236
2237         /* Process all devices that have gone away. */
2238         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2239                 scsi_device_list_entry) {
2240                 if (device->device_gone) {
2241                         list_del(&device->scsi_device_list_entry);
2242                         list_add_tail(&device->delete_list_entry, &delete_list);
2243                 }
2244         }
2245
2246         /* Process all new devices. */
2247         for (i = 0; i < num_new_devices; i++) {
2248                 device = new_device_list[i];
2249                 if (!device->new_device)
2250                         continue;
2251                 if (device->volume_offline)
2252                         continue;
2253                 list_add_tail(&device->scsi_device_list_entry,
2254                         &ctrl_info->scsi_device_list);
2255                 list_add_tail(&device->add_list_entry, &add_list);
2256                 /* To prevent this device structure from being freed later. */
2257                 device->keep_device = true;
2258                 pqi_init_device_tmf_work(device);
2259         }
2260
2261         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2262
2263         /*
2264          * If OFA is in progress and there are devices that need to be deleted,
2265          * allow any pending reset operations to continue and unblock any SCSI
2266          * requests before removal.
2267          */
2268         if (pqi_ofa_in_progress(ctrl_info)) {
2269                 list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
2270                         if (pqi_is_device_added(device))
2271                                 pqi_device_remove_start(device);
2272                 pqi_ctrl_unblock_device_reset(ctrl_info);
2273                 pqi_scsi_unblock_requests(ctrl_info);
2274         }
2275
2276         /* Remove all devices that have gone away. */
2277         list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
2278                 if (device->volume_offline) {
2279                         pqi_dev_info(ctrl_info, "offline", device);
2280                         pqi_show_volume_status(ctrl_info, device);
2281                 } else {
2282                         pqi_dev_info(ctrl_info, "removed", device);
2283                 }
2284                 if (pqi_is_device_added(device))
2285                         pqi_remove_device(ctrl_info, device);
2286                 list_del(&device->delete_list_entry);
2287                 pqi_free_device(device);
2288         }
2289
2290         /*
2291          * Notify the SML of any existing device changes such as;
2292          * queue depth, device size.
2293          */
2294         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
2295                 if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
2296                         device->advertised_queue_depth = device->queue_depth;
2297                         scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
2298                         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2299                         if (pqi_volume_rescan_needed(device)) {
2300                                 device->rescan = false;
2301                                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2302                                 scsi_rescan_device(device->sdev);
2303                         } else {
2304                                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2305                         }
2306                 }
2307         }
2308
2309         /* Expose any new devices. */
2310         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
2311                 if (!pqi_is_device_added(device)) {
2312                         rc = pqi_add_device(ctrl_info, device);
2313                         if (rc == 0) {
2314                                 pqi_dev_info(ctrl_info, "added", device);
2315                         } else {
2316                                 dev_warn(&ctrl_info->pci_dev->dev,
2317                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
2318                                         ctrl_info->scsi_host->host_no,
2319                                         device->bus, device->target,
2320                                         device->lun);
2321                                 pqi_fixup_botched_add(ctrl_info, device);
2322                         }
2323                 }
2324         }
2325
2326 }
2327
2328 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
2329 {
2330         /*
2331          * Only support the HBA controller itself as a RAID
2332          * controller.  If it's a RAID controller other than
2333          * the HBA itself (an external RAID controller, for
2334          * example), we don't support it.
2335          */
2336         if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
2337                 !pqi_is_hba_lunid(device->scsi3addr))
2338                         return false;
2339
2340         return true;
2341 }
2342
2343 static inline bool pqi_skip_device(u8 *scsi3addr)
2344 {
2345         /* Ignore all masked devices. */
2346         if (MASKED_DEVICE(scsi3addr))
2347                 return true;
2348
2349         return false;
2350 }
2351
2352 static inline void pqi_mask_device(u8 *scsi3addr)
2353 {
2354         scsi3addr[3] |= 0xc0;
2355 }
2356
2357 static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device)
2358 {
2359         if (pqi_is_logical_device(device))
2360                 return false;
2361
2362         return (device->path_map & (device->path_map - 1)) != 0;
2363 }
2364
2365 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
2366 {
2367         return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
2368 }
2369
2370 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2371 {
2372         int i;
2373         int rc;
2374         LIST_HEAD(new_device_list_head);
2375         struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
2376         struct report_log_lun_list *logdev_list = NULL;
2377         struct report_phys_lun_16byte_wwid *phys_lun;
2378         struct report_log_lun *log_lun;
2379         struct bmic_identify_physical_device *id_phys = NULL;
2380         u32 num_physicals;
2381         u32 num_logicals;
2382         struct pqi_scsi_dev **new_device_list = NULL;
2383         struct pqi_scsi_dev *device;
2384         struct pqi_scsi_dev *next;
2385         unsigned int num_new_devices;
2386         unsigned int num_valid_devices;
2387         bool is_physical_device;
2388         u8 *scsi3addr;
2389         unsigned int physical_index;
2390         unsigned int logical_index;
2391         static char *out_of_memory_msg =
2392                 "failed to allocate memory, device discovery stopped";
2393
2394         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2395         if (rc)
2396                 goto out;
2397
2398         if (physdev_list)
2399                 num_physicals =
2400                         get_unaligned_be32(&physdev_list->header.list_length)
2401                                 / sizeof(physdev_list->lun_entries[0]);
2402         else
2403                 num_physicals = 0;
2404
2405         if (logdev_list)
2406                 num_logicals =
2407                         get_unaligned_be32(&logdev_list->header.list_length)
2408                                 / sizeof(logdev_list->lun_entries[0]);
2409         else
2410                 num_logicals = 0;
2411
2412         if (num_physicals) {
2413                 /*
2414                  * We need this buffer for calls to pqi_get_physical_disk_info()
2415                  * below.  We allocate it here instead of inside
2416                  * pqi_get_physical_disk_info() because it's a fairly large
2417                  * buffer.
2418                  */
2419                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2420                 if (!id_phys) {
2421                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2422                                 out_of_memory_msg);
2423                         rc = -ENOMEM;
2424                         goto out;
2425                 }
2426
2427                 if (pqi_hide_vsep) {
2428                         for (i = num_physicals - 1; i >= 0; i--) {
2429                                 phys_lun = &physdev_list->lun_entries[i];
2430                                 if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
2431                                         pqi_mask_device(phys_lun->lunid);
2432                                         break;
2433                                 }
2434                         }
2435                 }
2436         }
2437
2438         if (num_logicals &&
2439                 (logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
2440                 ctrl_info->lv_drive_type_mix_valid = true;
2441
2442         num_new_devices = num_physicals + num_logicals;
2443
2444         new_device_list = kmalloc_array(num_new_devices,
2445                                         sizeof(*new_device_list),
2446                                         GFP_KERNEL);
2447         if (!new_device_list) {
2448                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2449                 rc = -ENOMEM;
2450                 goto out;
2451         }
2452
2453         for (i = 0; i < num_new_devices; i++) {
2454                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2455                 if (!device) {
2456                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2457                                 out_of_memory_msg);
2458                         rc = -ENOMEM;
2459                         goto out;
2460                 }
2461                 list_add_tail(&device->new_device_list_entry,
2462                         &new_device_list_head);
2463         }
2464
2465         device = NULL;
2466         num_valid_devices = 0;
2467         physical_index = 0;
2468         logical_index = 0;
2469
2470         for (i = 0; i < num_new_devices; i++) {
2471
2472                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2473                         (pqi_expose_ld_first && i >= num_logicals)) {
2474                         is_physical_device = true;
2475                         phys_lun = &physdev_list->lun_entries[physical_index++];
2476                         log_lun = NULL;
2477                         scsi3addr = phys_lun->lunid;
2478                 } else {
2479                         is_physical_device = false;
2480                         phys_lun = NULL;
2481                         log_lun = &logdev_list->lun_entries[logical_index++];
2482                         scsi3addr = log_lun->lunid;
2483                 }
2484
2485                 if (is_physical_device && pqi_skip_device(scsi3addr))
2486                         continue;
2487
2488                 if (device)
2489                         device = list_next_entry(device, new_device_list_entry);
2490                 else
2491                         device = list_first_entry(&new_device_list_head,
2492                                 struct pqi_scsi_dev, new_device_list_entry);
2493
2494                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2495                 device->is_physical_device = is_physical_device;
2496                 if (is_physical_device) {
2497                         device->device_type = phys_lun->device_type;
2498                         if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2499                                 device->is_expander_smp_device = true;
2500                 } else {
2501                         device->is_external_raid_device =
2502                                 pqi_is_external_raid_addr(scsi3addr);
2503                 }
2504
2505                 if (!pqi_is_supported_device(device))
2506                         continue;
2507
2508                 /* Gather information about the device. */
2509                 rc = pqi_get_device_info(ctrl_info, device, id_phys);
2510                 if (rc == -ENOMEM) {
2511                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2512                                 out_of_memory_msg);
2513                         goto out;
2514                 }
2515                 if (rc) {
2516                         if (device->is_physical_device)
2517                                 dev_warn(&ctrl_info->pci_dev->dev,
2518                                         "obtaining device info failed, skipping physical device %016llx%016llx\n",
2519                                         get_unaligned_be64(&phys_lun->wwid[0]),
2520                                         get_unaligned_be64(&phys_lun->wwid[8]));
2521                         else
2522                                 dev_warn(&ctrl_info->pci_dev->dev,
2523                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2524                                         *((u32 *)&device->scsi3addr),
2525                                         *((u32 *)&device->scsi3addr[4]));
2526                         rc = 0;
2527                         continue;
2528                 }
2529
2530                 /* Do not present disks that the OS cannot fully probe. */
2531                 if (pqi_keep_device_offline(device))
2532                         continue;
2533
2534                 pqi_assign_bus_target_lun(device);
2535
2536                 if (device->is_physical_device) {
2537                         memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
2538                         if ((phys_lun->device_flags &
2539                                 CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2540                                 phys_lun->aio_handle) {
2541                                         device->aio_enabled = true;
2542                                         device->aio_handle =
2543                                                 phys_lun->aio_handle;
2544                         }
2545                 } else {
2546                         memcpy(device->volume_id, log_lun->volume_id,
2547                                 sizeof(device->volume_id));
2548                 }
2549
2550                 device->sas_address = get_unaligned_be64(&device->wwid[0]);
2551
2552                 new_device_list[num_valid_devices++] = device;
2553         }
2554
2555         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2556
2557 out:
2558         list_for_each_entry_safe(device, next, &new_device_list_head,
2559                 new_device_list_entry) {
2560                 if (device->keep_device)
2561                         continue;
2562                 list_del(&device->new_device_list_entry);
2563                 pqi_free_device(device);
2564         }
2565
2566         kfree(new_device_list);
2567         kfree(physdev_list);
2568         kfree(logdev_list);
2569         kfree(id_phys);
2570
2571         return rc;
2572 }
2573
2574 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2575 {
2576         int rc;
2577         int mutex_acquired;
2578
2579         if (pqi_ctrl_offline(ctrl_info))
2580                 return -ENXIO;
2581
2582         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
2583
2584         if (!mutex_acquired) {
2585                 if (pqi_ctrl_scan_blocked(ctrl_info))
2586                         return -EBUSY;
2587                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2588                 return -EINPROGRESS;
2589         }
2590
2591         rc = pqi_update_scsi_devices(ctrl_info);
2592         if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
2593                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2594
2595         mutex_unlock(&ctrl_info->scan_mutex);
2596
2597         return rc;
2598 }
2599
2600 static void pqi_scan_start(struct Scsi_Host *shost)
2601 {
2602         struct pqi_ctrl_info *ctrl_info;
2603
2604         ctrl_info = shost_to_hba(shost);
2605
2606         pqi_scan_scsi_devices(ctrl_info);
2607 }
2608
2609 /* Returns TRUE if scan is finished. */
2610
2611 static int pqi_scan_finished(struct Scsi_Host *shost,
2612         unsigned long elapsed_time)
2613 {
2614         struct pqi_ctrl_info *ctrl_info;
2615
2616         ctrl_info = shost_priv(shost);
2617
2618         return !mutex_is_locked(&ctrl_info->scan_mutex);
2619 }
2620
2621 static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
2622         struct raid_map *raid_map, u64 first_block)
2623 {
2624         u32 volume_blk_size;
2625
2626         /*
2627          * Set the encryption tweak values based on logical block address.
2628          * If the block size is 512, the tweak value is equal to the LBA.
2629          * For other block sizes, tweak value is (LBA * block size) / 512.
2630          */
2631         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2632         if (volume_blk_size != 512)
2633                 first_block = (first_block * volume_blk_size) / 512;
2634
2635         encryption_info->data_encryption_key_index =
2636                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2637         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2638         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2639 }
2640
2641 /*
2642  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2643  */
2644
2645 static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
2646         struct pqi_scsi_dev_raid_map_data *rmd)
2647 {
2648         bool is_supported = true;
2649
2650         switch (rmd->raid_level) {
2651         case SA_RAID_0:
2652                 break;
2653         case SA_RAID_1:
2654                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2655                         rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
2656                         is_supported = false;
2657                 break;
2658         case SA_RAID_TRIPLE:
2659                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2660                         rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
2661                         is_supported = false;
2662                 break;
2663         case SA_RAID_5:
2664                 if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
2665                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2666                         is_supported = false;
2667                 break;
2668         case SA_RAID_6:
2669                 if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
2670                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2671                         is_supported = false;
2672                 break;
2673         default:
2674                 is_supported = false;
2675                 break;
2676         }
2677
2678         return is_supported;
2679 }
2680
2681 #define PQI_RAID_BYPASS_INELIGIBLE      1
2682
2683 static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
2684         struct pqi_scsi_dev_raid_map_data *rmd)
2685 {
2686         /* Check for valid opcode, get LBA and block count. */
2687         switch (scmd->cmnd[0]) {
2688         case WRITE_6:
2689                 rmd->is_write = true;
2690                 fallthrough;
2691         case READ_6:
2692                 rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2693                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2694                 rmd->block_cnt = (u32)scmd->cmnd[4];
2695                 if (rmd->block_cnt == 0)
2696                         rmd->block_cnt = 256;
2697                 break;
2698         case WRITE_10:
2699                 rmd->is_write = true;
2700                 fallthrough;
2701         case READ_10:
2702                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2703                 rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2704                 break;
2705         case WRITE_12:
2706                 rmd->is_write = true;
2707                 fallthrough;
2708         case READ_12:
2709                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2710                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2711                 break;
2712         case WRITE_16:
2713                 rmd->is_write = true;
2714                 fallthrough;
2715         case READ_16:
2716                 rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
2717                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2718                 break;
2719         default:
2720                 /* Process via normal I/O path. */
2721                 return PQI_RAID_BYPASS_INELIGIBLE;
2722         }
2723
2724         put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
2725
2726         return 0;
2727 }
2728
2729 static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
2730         struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
2731 {
2732 #if BITS_PER_LONG == 32
2733         u64 tmpdiv;
2734 #endif
2735
2736         rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
2737
2738         /* Check for invalid block or wraparound. */
2739         if (rmd->last_block >=
2740                 get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2741                 rmd->last_block < rmd->first_block)
2742                 return PQI_RAID_BYPASS_INELIGIBLE;
2743
2744         rmd->data_disks_per_row =
2745                 get_unaligned_le16(&raid_map->data_disks_per_row);
2746         rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
2747         rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2748
2749         /* Calculate stripe information for the request. */
2750         rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
2751         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2752                 return PQI_RAID_BYPASS_INELIGIBLE;
2753 #if BITS_PER_LONG == 32
2754         tmpdiv = rmd->first_block;
2755         do_div(tmpdiv, rmd->blocks_per_row);
2756         rmd->first_row = tmpdiv;
2757         tmpdiv = rmd->last_block;
2758         do_div(tmpdiv, rmd->blocks_per_row);
2759         rmd->last_row = tmpdiv;
2760         rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
2761         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
2762         tmpdiv = rmd->first_row_offset;
2763         do_div(tmpdiv, rmd->strip_size);
2764         rmd->first_column = tmpdiv;
2765         tmpdiv = rmd->last_row_offset;
2766         do_div(tmpdiv, rmd->strip_size);
2767         rmd->last_column = tmpdiv;
2768 #else
2769         rmd->first_row = rmd->first_block / rmd->blocks_per_row;
2770         rmd->last_row = rmd->last_block / rmd->blocks_per_row;
2771         rmd->first_row_offset = (u32)(rmd->first_block -
2772                 (rmd->first_row * rmd->blocks_per_row));
2773         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
2774                 rmd->blocks_per_row));
2775         rmd->first_column = rmd->first_row_offset / rmd->strip_size;
2776         rmd->last_column = rmd->last_row_offset / rmd->strip_size;
2777 #endif
2778
2779         /* If this isn't a single row/column then give to the controller. */
2780         if (rmd->first_row != rmd->last_row ||
2781                 rmd->first_column != rmd->last_column)
2782                 return PQI_RAID_BYPASS_INELIGIBLE;
2783
2784         /* Proceeding with driver mapping. */
2785         rmd->total_disks_per_row = rmd->data_disks_per_row +
2786                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2787         rmd->map_row = ((u32)(rmd->first_row >>
2788                 raid_map->parity_rotation_shift)) %
2789                 get_unaligned_le16(&raid_map->row_cnt);
2790         rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
2791                 rmd->first_column;
2792
2793         return 0;
2794 }
2795
2796 static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
2797         struct raid_map *raid_map)
2798 {
2799 #if BITS_PER_LONG == 32
2800         u64 tmpdiv;
2801 #endif
2802
2803         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2804                 return PQI_RAID_BYPASS_INELIGIBLE;
2805
2806         /* RAID 50/60 */
2807         /* Verify first and last block are in same RAID group. */
2808         rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
2809 #if BITS_PER_LONG == 32
2810         tmpdiv = rmd->first_block;
2811         rmd->first_group = do_div(tmpdiv, rmd->stripesize);
2812         tmpdiv = rmd->first_group;
2813         do_div(tmpdiv, rmd->blocks_per_row);
2814         rmd->first_group = tmpdiv;
2815         tmpdiv = rmd->last_block;
2816         rmd->last_group = do_div(tmpdiv, rmd->stripesize);
2817         tmpdiv = rmd->last_group;
2818         do_div(tmpdiv, rmd->blocks_per_row);
2819         rmd->last_group = tmpdiv;
2820 #else
2821         rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
2822         rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
2823 #endif
2824         if (rmd->first_group != rmd->last_group)
2825                 return PQI_RAID_BYPASS_INELIGIBLE;
2826
2827         /* Verify request is in a single row of RAID 5/6. */
2828 #if BITS_PER_LONG == 32
2829         tmpdiv = rmd->first_block;
2830         do_div(tmpdiv, rmd->stripesize);
2831         rmd->first_row = tmpdiv;
2832         rmd->r5or6_first_row = tmpdiv;
2833         tmpdiv = rmd->last_block;
2834         do_div(tmpdiv, rmd->stripesize);
2835         rmd->r5or6_last_row = tmpdiv;
2836 #else
2837         rmd->first_row = rmd->r5or6_first_row =
2838                 rmd->first_block / rmd->stripesize;
2839         rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
2840 #endif
2841         if (rmd->r5or6_first_row != rmd->r5or6_last_row)
2842                 return PQI_RAID_BYPASS_INELIGIBLE;
2843
2844         /* Verify request is in a single column. */
2845 #if BITS_PER_LONG == 32
2846         tmpdiv = rmd->first_block;
2847         rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
2848         tmpdiv = rmd->first_row_offset;
2849         rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
2850         rmd->r5or6_first_row_offset = rmd->first_row_offset;
2851         tmpdiv = rmd->last_block;
2852         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
2853         tmpdiv = rmd->r5or6_last_row_offset;
2854         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
2855         tmpdiv = rmd->r5or6_first_row_offset;
2856         do_div(tmpdiv, rmd->strip_size);
2857         rmd->first_column = rmd->r5or6_first_column = tmpdiv;
2858         tmpdiv = rmd->r5or6_last_row_offset;
2859         do_div(tmpdiv, rmd->strip_size);
2860         rmd->r5or6_last_column = tmpdiv;
2861 #else
2862         rmd->first_row_offset = rmd->r5or6_first_row_offset =
2863                 (u32)((rmd->first_block % rmd->stripesize) %
2864                 rmd->blocks_per_row);
2865
2866         rmd->r5or6_last_row_offset =
2867                 (u32)((rmd->last_block % rmd->stripesize) %
2868                 rmd->blocks_per_row);
2869
2870         rmd->first_column =
2871                 rmd->r5or6_first_row_offset / rmd->strip_size;
2872         rmd->r5or6_first_column = rmd->first_column;
2873         rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
2874 #endif
2875         if (rmd->r5or6_first_column != rmd->r5or6_last_column)
2876                 return PQI_RAID_BYPASS_INELIGIBLE;
2877
2878         /* Request is eligible. */
2879         rmd->map_row =
2880                 ((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
2881                 get_unaligned_le16(&raid_map->row_cnt);
2882
2883         rmd->map_index = (rmd->first_group *
2884                 (get_unaligned_le16(&raid_map->row_cnt) *
2885                 rmd->total_disks_per_row)) +
2886                 (rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
2887
2888         if (rmd->is_write) {
2889                 u32 index;
2890
2891                 /*
2892                  * p_parity_it_nexus and q_parity_it_nexus are pointers to the
2893                  * parity entries inside the device's raid_map.
2894                  *
2895                  * A device's RAID map is bounded by: number of RAID disks squared.
2896                  *
2897                  * The devices RAID map size is checked during device
2898                  * initialization.
2899                  */
2900                 index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
2901                 index *= rmd->total_disks_per_row;
2902                 index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
2903
2904                 rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
2905                 if (rmd->raid_level == SA_RAID_6) {
2906                         rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
2907                         rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
2908                 }
2909 #if BITS_PER_LONG == 32
2910                 tmpdiv = rmd->first_block;
2911                 do_div(tmpdiv, rmd->blocks_per_row);
2912                 rmd->row = tmpdiv;
2913 #else
2914                 rmd->row = rmd->first_block / rmd->blocks_per_row;
2915 #endif
2916         }
2917
2918         return 0;
2919 }
2920
2921 static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
2922 {
2923         /* Build the new CDB for the physical disk I/O. */
2924         if (rmd->disk_block > 0xffffffff) {
2925                 rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
2926                 rmd->cdb[1] = 0;
2927                 put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
2928                 put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
2929                 rmd->cdb[14] = 0;
2930                 rmd->cdb[15] = 0;
2931                 rmd->cdb_length = 16;
2932         } else {
2933                 rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
2934                 rmd->cdb[1] = 0;
2935                 put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
2936                 rmd->cdb[6] = 0;
2937                 put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
2938                 rmd->cdb[9] = 0;
2939                 rmd->cdb_length = 10;
2940         }
2941 }
2942
2943 static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
2944         struct pqi_scsi_dev_raid_map_data *rmd)
2945 {
2946         u32 index;
2947         u32 group;
2948
2949         group = rmd->map_index / rmd->data_disks_per_row;
2950
2951         index = rmd->map_index - (group * rmd->data_disks_per_row);
2952         rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
2953         index += rmd->data_disks_per_row;
2954         rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
2955         if (rmd->layout_map_count > 2) {
2956                 index += rmd->data_disks_per_row;
2957                 rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
2958         }
2959
2960         rmd->num_it_nexus_entries = rmd->layout_map_count;
2961 }
2962
2963 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2964         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2965         struct pqi_queue_group *queue_group)
2966 {
2967         int rc;
2968         struct raid_map *raid_map;
2969         u32 group;
2970         u32 next_bypass_group;
2971         struct pqi_encryption_info *encryption_info_ptr;
2972         struct pqi_encryption_info encryption_info;
2973         struct pqi_scsi_dev_raid_map_data rmd = { 0 };
2974
2975         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
2976         if (rc)
2977                 return PQI_RAID_BYPASS_INELIGIBLE;
2978
2979         rmd.raid_level = device->raid_level;
2980
2981         if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
2982                 return PQI_RAID_BYPASS_INELIGIBLE;
2983
2984         if (unlikely(rmd.block_cnt == 0))
2985                 return PQI_RAID_BYPASS_INELIGIBLE;
2986
2987         raid_map = device->raid_map;
2988
2989         rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
2990         if (rc)
2991                 return PQI_RAID_BYPASS_INELIGIBLE;
2992
2993         if (device->raid_level == SA_RAID_1 ||
2994                 device->raid_level == SA_RAID_TRIPLE) {
2995                 if (rmd.is_write) {
2996                         pqi_calc_aio_r1_nexus(raid_map, &rmd);
2997                 } else {
2998                         group = device->next_bypass_group[rmd.map_index];
2999                         next_bypass_group = group + 1;
3000                         if (next_bypass_group >= rmd.layout_map_count)
3001                                 next_bypass_group = 0;
3002                         device->next_bypass_group[rmd.map_index] = next_bypass_group;
3003                         rmd.map_index += group * rmd.data_disks_per_row;
3004                 }
3005         } else if ((device->raid_level == SA_RAID_5 ||
3006                 device->raid_level == SA_RAID_6) &&
3007                 (rmd.layout_map_count > 1 || rmd.is_write)) {
3008                 rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
3009                 if (rc)
3010                         return PQI_RAID_BYPASS_INELIGIBLE;
3011         }
3012
3013         if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
3014                 return PQI_RAID_BYPASS_INELIGIBLE;
3015
3016         rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
3017         rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
3018                 rmd.first_row * rmd.strip_size +
3019                 (rmd.first_row_offset - rmd.first_column * rmd.strip_size);
3020         rmd.disk_block_cnt = rmd.block_cnt;
3021
3022         /* Handle differing logical/physical block sizes. */
3023         if (raid_map->phys_blk_shift) {
3024                 rmd.disk_block <<= raid_map->phys_blk_shift;
3025                 rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
3026         }
3027
3028         if (unlikely(rmd.disk_block_cnt > 0xffff))
3029                 return PQI_RAID_BYPASS_INELIGIBLE;
3030
3031         pqi_set_aio_cdb(&rmd);
3032
3033         if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
3034                 if (rmd.data_length > device->max_transfer_encrypted)
3035                         return PQI_RAID_BYPASS_INELIGIBLE;
3036                 pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
3037                 encryption_info_ptr = &encryption_info;
3038         } else {
3039                 encryption_info_ptr = NULL;
3040         }
3041
3042         if (rmd.is_write) {
3043                 switch (device->raid_level) {
3044                 case SA_RAID_1:
3045                 case SA_RAID_TRIPLE:
3046                         return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
3047                                 encryption_info_ptr, device, &rmd);
3048                 case SA_RAID_5:
3049                 case SA_RAID_6:
3050                         return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
3051                                 encryption_info_ptr, device, &rmd);
3052                 }
3053         }
3054
3055         return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
3056                 rmd.cdb, rmd.cdb_length, queue_group,
3057                 encryption_info_ptr, true, false);
3058 }
3059
3060 #define PQI_STATUS_IDLE         0x0
3061
3062 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
3063 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
3064
3065 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
3066 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
3067 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
3068 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
3069 #define PQI_DEVICE_STATE_ERROR                          0x4
3070
3071 #define PQI_MODE_READY_TIMEOUT_SECS             30
3072 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
3073
3074 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
3075 {
3076         struct pqi_device_registers __iomem *pqi_registers;
3077         unsigned long timeout;
3078         u64 signature;
3079         u8 status;
3080
3081         pqi_registers = ctrl_info->pqi_registers;
3082         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
3083
3084         while (1) {
3085                 signature = readq(&pqi_registers->signature);
3086                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
3087                         sizeof(signature)) == 0)
3088                         break;
3089                 if (time_after(jiffies, timeout)) {
3090                         dev_err(&ctrl_info->pci_dev->dev,
3091                                 "timed out waiting for PQI signature\n");
3092                         return -ETIMEDOUT;
3093                 }
3094                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3095         }
3096
3097         while (1) {
3098                 status = readb(&pqi_registers->function_and_status_code);
3099                 if (status == PQI_STATUS_IDLE)
3100                         break;
3101                 if (time_after(jiffies, timeout)) {
3102                         dev_err(&ctrl_info->pci_dev->dev,
3103                                 "timed out waiting for PQI IDLE\n");
3104                         return -ETIMEDOUT;
3105                 }
3106                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3107         }
3108
3109         while (1) {
3110                 if (readl(&pqi_registers->device_status) ==
3111                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
3112                         break;
3113                 if (time_after(jiffies, timeout)) {
3114                         dev_err(&ctrl_info->pci_dev->dev,
3115                                 "timed out waiting for PQI all registers ready\n");
3116                         return -ETIMEDOUT;
3117                 }
3118                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3119         }
3120
3121         return 0;
3122 }
3123
3124 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
3125 {
3126         struct pqi_scsi_dev *device;
3127
3128         device = io_request->scmd->device->hostdata;
3129         device->raid_bypass_enabled = false;
3130         device->aio_enabled = false;
3131 }
3132
3133 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
3134 {
3135         struct pqi_ctrl_info *ctrl_info;
3136         struct pqi_scsi_dev *device;
3137
3138         device = sdev->hostdata;
3139         if (device->device_offline)
3140                 return;
3141
3142         device->device_offline = true;
3143         ctrl_info = shost_to_hba(sdev->host);
3144         pqi_schedule_rescan_worker(ctrl_info);
3145         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
3146                 path, ctrl_info->scsi_host->host_no, device->bus,
3147                 device->target, device->lun);
3148 }
3149
3150 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
3151 {
3152         u8 scsi_status;
3153         u8 host_byte;
3154         struct scsi_cmnd *scmd;
3155         struct pqi_raid_error_info *error_info;
3156         size_t sense_data_length;
3157         int residual_count;
3158         int xfer_count;
3159         struct scsi_sense_hdr sshdr;
3160
3161         scmd = io_request->scmd;
3162         if (!scmd)
3163                 return;
3164
3165         error_info = io_request->error_info;
3166         scsi_status = error_info->status;
3167         host_byte = DID_OK;
3168
3169         switch (error_info->data_out_result) {
3170         case PQI_DATA_IN_OUT_GOOD:
3171                 break;
3172         case PQI_DATA_IN_OUT_UNDERFLOW:
3173                 xfer_count =
3174                         get_unaligned_le32(&error_info->data_out_transferred);
3175                 residual_count = scsi_bufflen(scmd) - xfer_count;
3176                 scsi_set_resid(scmd, residual_count);
3177                 if (xfer_count < scmd->underflow)
3178                         host_byte = DID_SOFT_ERROR;
3179                 break;
3180         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
3181         case PQI_DATA_IN_OUT_ABORTED:
3182                 host_byte = DID_ABORT;
3183                 break;
3184         case PQI_DATA_IN_OUT_TIMEOUT:
3185                 host_byte = DID_TIME_OUT;
3186                 break;
3187         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
3188         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
3189         case PQI_DATA_IN_OUT_BUFFER_ERROR:
3190         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
3191         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
3192         case PQI_DATA_IN_OUT_ERROR:
3193         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
3194         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
3195         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
3196         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
3197         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
3198         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
3199         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
3200         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
3201         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
3202         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
3203         default:
3204                 host_byte = DID_ERROR;
3205                 break;
3206         }
3207
3208         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
3209         if (sense_data_length == 0)
3210                 sense_data_length =
3211                         get_unaligned_le16(&error_info->response_data_length);
3212         if (sense_data_length) {
3213                 if (sense_data_length > sizeof(error_info->data))
3214                         sense_data_length = sizeof(error_info->data);
3215
3216                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3217                         scsi_normalize_sense(error_info->data,
3218                                 sense_data_length, &sshdr) &&
3219                                 sshdr.sense_key == HARDWARE_ERROR &&
3220                                 sshdr.asc == 0x3e) {
3221                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
3222                         struct pqi_scsi_dev *device = scmd->device->hostdata;
3223
3224                         switch (sshdr.ascq) {
3225                         case 0x1: /* LOGICAL UNIT FAILURE */
3226                                 if (printk_ratelimit())
3227                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
3228                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3229                                 pqi_take_device_offline(scmd->device, "RAID");
3230                                 host_byte = DID_NO_CONNECT;
3231                                 break;
3232
3233                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
3234                                 if (printk_ratelimit())
3235                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
3236                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3237                                 break;
3238                         }
3239                 }
3240
3241                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3242                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
3243                 memcpy(scmd->sense_buffer, error_info->data,
3244                         sense_data_length);
3245         }
3246
3247         scmd->result = scsi_status;
3248         set_host_byte(scmd, host_byte);
3249 }
3250
3251 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
3252 {
3253         u8 scsi_status;
3254         u8 host_byte;
3255         struct scsi_cmnd *scmd;
3256         struct pqi_aio_error_info *error_info;
3257         size_t sense_data_length;
3258         int residual_count;
3259         int xfer_count;
3260         bool device_offline;
3261         struct pqi_scsi_dev *device;
3262
3263         scmd = io_request->scmd;
3264         error_info = io_request->error_info;
3265         host_byte = DID_OK;
3266         sense_data_length = 0;
3267         device_offline = false;
3268         device = scmd->device->hostdata;
3269
3270         switch (error_info->service_response) {
3271         case PQI_AIO_SERV_RESPONSE_COMPLETE:
3272                 scsi_status = error_info->status;
3273                 break;
3274         case PQI_AIO_SERV_RESPONSE_FAILURE:
3275                 switch (error_info->status) {
3276                 case PQI_AIO_STATUS_IO_ABORTED:
3277                         scsi_status = SAM_STAT_TASK_ABORTED;
3278                         break;
3279                 case PQI_AIO_STATUS_UNDERRUN:
3280                         scsi_status = SAM_STAT_GOOD;
3281                         residual_count = get_unaligned_le32(
3282                                                 &error_info->residual_count);
3283                         scsi_set_resid(scmd, residual_count);
3284                         xfer_count = scsi_bufflen(scmd) - residual_count;
3285                         if (xfer_count < scmd->underflow)
3286                                 host_byte = DID_SOFT_ERROR;
3287                         break;
3288                 case PQI_AIO_STATUS_OVERRUN:
3289                         scsi_status = SAM_STAT_GOOD;
3290                         break;
3291                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
3292                         pqi_aio_path_disabled(io_request);
3293                         if (pqi_is_multipath_device(device)) {
3294                                 pqi_device_remove_start(device);
3295                                 host_byte = DID_NO_CONNECT;
3296                                 scsi_status = SAM_STAT_CHECK_CONDITION;
3297                         } else {
3298                                 scsi_status = SAM_STAT_GOOD;
3299                                 io_request->status = -EAGAIN;
3300                         }
3301                         break;
3302                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
3303                 case PQI_AIO_STATUS_INVALID_DEVICE:
3304                         if (!io_request->raid_bypass) {
3305                                 device_offline = true;
3306                                 pqi_take_device_offline(scmd->device, "AIO");
3307                                 host_byte = DID_NO_CONNECT;
3308                         }
3309                         scsi_status = SAM_STAT_CHECK_CONDITION;
3310                         break;
3311                 case PQI_AIO_STATUS_IO_ERROR:
3312                 default:
3313                         scsi_status = SAM_STAT_CHECK_CONDITION;
3314                         break;
3315                 }
3316                 break;
3317         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
3318         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
3319                 scsi_status = SAM_STAT_GOOD;
3320                 break;
3321         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
3322         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
3323         default:
3324                 scsi_status = SAM_STAT_CHECK_CONDITION;
3325                 break;
3326         }
3327
3328         if (error_info->data_present) {
3329                 sense_data_length =
3330                         get_unaligned_le16(&error_info->data_length);
3331                 if (sense_data_length) {
3332                         if (sense_data_length > sizeof(error_info->data))
3333                                 sense_data_length = sizeof(error_info->data);
3334                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3335                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
3336                         memcpy(scmd->sense_buffer, error_info->data,
3337                                 sense_data_length);
3338                 }
3339         }
3340
3341         if (device_offline && sense_data_length == 0)
3342                 scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
3343
3344         scmd->result = scsi_status;
3345         set_host_byte(scmd, host_byte);
3346 }
3347
3348 static void pqi_process_io_error(unsigned int iu_type,
3349         struct pqi_io_request *io_request)
3350 {
3351         switch (iu_type) {
3352         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3353                 pqi_process_raid_io_error(io_request);
3354                 break;
3355         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3356                 pqi_process_aio_io_error(io_request);
3357                 break;
3358         }
3359 }
3360
3361 static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
3362         struct pqi_task_management_response *response)
3363 {
3364         int rc;
3365
3366         switch (response->response_code) {
3367         case SOP_TMF_COMPLETE:
3368         case SOP_TMF_FUNCTION_SUCCEEDED:
3369                 rc = 0;
3370                 break;
3371         case SOP_TMF_REJECTED:
3372                 rc = -EAGAIN;
3373                 break;
3374         case SOP_TMF_INCORRECT_LOGICAL_UNIT:
3375                 rc = -ENODEV;
3376                 break;
3377         default:
3378                 rc = -EIO;
3379                 break;
3380         }
3381
3382         if (rc)
3383                 dev_err(&ctrl_info->pci_dev->dev,
3384                         "Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
3385
3386         return rc;
3387 }
3388
3389 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info,
3390         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
3391 {
3392         pqi_take_ctrl_offline(ctrl_info, ctrl_shutdown_reason);
3393 }
3394
3395 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
3396 {
3397         int num_responses;
3398         pqi_index_t oq_pi;
3399         pqi_index_t oq_ci;
3400         struct pqi_io_request *io_request;
3401         struct pqi_io_response *response;
3402         u16 request_id;
3403
3404         num_responses = 0;
3405         oq_ci = queue_group->oq_ci_copy;
3406
3407         while (1) {
3408                 oq_pi = readl(queue_group->oq_pi);
3409                 if (oq_pi >= ctrl_info->num_elements_per_oq) {
3410                         pqi_invalid_response(ctrl_info, PQI_IO_PI_OUT_OF_RANGE);
3411                         dev_err(&ctrl_info->pci_dev->dev,
3412                                 "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3413                                 oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
3414                         return -1;
3415                 }
3416                 if (oq_pi == oq_ci)
3417                         break;
3418
3419                 num_responses++;
3420                 response = queue_group->oq_element_array +
3421                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3422
3423                 request_id = get_unaligned_le16(&response->request_id);
3424                 if (request_id >= ctrl_info->max_io_slots) {
3425                         pqi_invalid_response(ctrl_info, PQI_INVALID_REQ_ID);
3426                         dev_err(&ctrl_info->pci_dev->dev,
3427                                 "request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
3428                                 request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
3429                         return -1;
3430                 }
3431
3432                 io_request = &ctrl_info->io_request_pool[request_id];
3433                 if (atomic_read(&io_request->refcount) == 0) {
3434                         pqi_invalid_response(ctrl_info, PQI_UNMATCHED_REQ_ID);
3435                         dev_err(&ctrl_info->pci_dev->dev,
3436                                 "request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
3437                                 request_id, oq_pi, oq_ci);
3438                         return -1;
3439                 }
3440
3441                 switch (response->header.iu_type) {
3442                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
3443                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
3444                         if (io_request->scmd)
3445                                 io_request->scmd->result = 0;
3446                         fallthrough;
3447                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
3448                         break;
3449                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
3450                         io_request->status =
3451                                 get_unaligned_le16(
3452                                 &((struct pqi_vendor_general_response *)response)->status);
3453                         break;
3454                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
3455                         io_request->status = pqi_interpret_task_management_response(ctrl_info,
3456                                 (void *)response);
3457                         break;
3458                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
3459                         pqi_aio_path_disabled(io_request);
3460                         io_request->status = -EAGAIN;
3461                         break;
3462                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3463                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3464                         io_request->error_info = ctrl_info->error_buffer +
3465                                 (get_unaligned_le16(&response->error_index) *
3466                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
3467                         pqi_process_io_error(response->header.iu_type, io_request);
3468                         break;
3469                 default:
3470                         pqi_invalid_response(ctrl_info, PQI_UNEXPECTED_IU_TYPE);
3471                         dev_err(&ctrl_info->pci_dev->dev,
3472                                 "unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
3473                                 response->header.iu_type, oq_pi, oq_ci);
3474                         return -1;
3475                 }
3476
3477                 io_request->io_complete_callback(io_request, io_request->context);
3478
3479                 /*
3480                  * Note that the I/O request structure CANNOT BE TOUCHED after
3481                  * returning from the I/O completion callback!
3482                  */
3483                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
3484         }
3485
3486         if (num_responses) {
3487                 queue_group->oq_ci_copy = oq_ci;
3488                 writel(oq_ci, queue_group->oq_ci);
3489         }
3490
3491         return num_responses;
3492 }
3493
3494 static inline unsigned int pqi_num_elements_free(unsigned int pi,
3495         unsigned int ci, unsigned int elements_in_queue)
3496 {
3497         unsigned int num_elements_used;
3498
3499         if (pi >= ci)
3500                 num_elements_used = pi - ci;
3501         else
3502                 num_elements_used = elements_in_queue - ci + pi;
3503
3504         return elements_in_queue - num_elements_used - 1;
3505 }
3506
3507 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3508         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3509 {
3510         pqi_index_t iq_pi;
3511         pqi_index_t iq_ci;
3512         unsigned long flags;
3513         void *next_element;
3514         struct pqi_queue_group *queue_group;
3515
3516         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3517         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3518
3519         while (1) {
3520                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3521
3522                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3523                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3524
3525                 if (pqi_num_elements_free(iq_pi, iq_ci,
3526                         ctrl_info->num_elements_per_iq))
3527                         break;
3528
3529                 spin_unlock_irqrestore(
3530                         &queue_group->submit_lock[RAID_PATH], flags);
3531
3532                 if (pqi_ctrl_offline(ctrl_info))
3533                         return;
3534         }
3535
3536         next_element = queue_group->iq_element_array[RAID_PATH] +
3537                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3538
3539         memcpy(next_element, iu, iu_length);
3540
3541         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3542         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3543
3544         /*
3545          * This write notifies the controller that an IU is available to be
3546          * processed.
3547          */
3548         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3549
3550         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3551 }
3552
3553 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3554         struct pqi_event *event)
3555 {
3556         struct pqi_event_acknowledge_request request;
3557
3558         memset(&request, 0, sizeof(request));
3559
3560         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3561         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3562                 &request.header.iu_length);
3563         request.event_type = event->event_type;
3564         put_unaligned_le16(event->event_id, &request.event_id);
3565         put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
3566
3567         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3568 }
3569
3570 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3571 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3572
3573 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3574         struct pqi_ctrl_info *ctrl_info)
3575 {
3576         u8 status;
3577         unsigned long timeout;
3578
3579         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * HZ) + jiffies;
3580
3581         while (1) {
3582                 status = pqi_read_soft_reset_status(ctrl_info);
3583                 if (status & PQI_SOFT_RESET_INITIATE)
3584                         return RESET_INITIATE_DRIVER;
3585
3586                 if (status & PQI_SOFT_RESET_ABORT)
3587                         return RESET_ABORT;
3588
3589                 if (!sis_is_firmware_running(ctrl_info))
3590                         return RESET_NORESPONSE;
3591
3592                 if (time_after(jiffies, timeout)) {
3593                         dev_warn(&ctrl_info->pci_dev->dev,
3594                                 "timed out waiting for soft reset status\n");
3595                         return RESET_TIMEDOUT;
3596                 }
3597
3598                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3599         }
3600 }
3601
3602 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
3603 {
3604         int rc;
3605         unsigned int delay_secs;
3606         enum pqi_soft_reset_status reset_status;
3607
3608         if (ctrl_info->soft_reset_handshake_supported)
3609                 reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
3610         else
3611                 reset_status = RESET_INITIATE_FIRMWARE;
3612
3613         delay_secs = PQI_POST_RESET_DELAY_SECS;
3614
3615         switch (reset_status) {
3616         case RESET_TIMEDOUT:
3617                 delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
3618                 fallthrough;
3619         case RESET_INITIATE_DRIVER:
3620                 dev_info(&ctrl_info->pci_dev->dev,
3621                                 "Online Firmware Activation: resetting controller\n");
3622                 sis_soft_reset(ctrl_info);
3623                 fallthrough;
3624         case RESET_INITIATE_FIRMWARE:
3625                 ctrl_info->pqi_mode_enabled = false;
3626                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
3627                 rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
3628                 pqi_ofa_free_host_buffer(ctrl_info);
3629                 pqi_ctrl_ofa_done(ctrl_info);
3630                 dev_info(&ctrl_info->pci_dev->dev,
3631                                 "Online Firmware Activation: %s\n",
3632                                 rc == 0 ? "SUCCESS" : "FAILED");
3633                 break;
3634         case RESET_ABORT:
3635                 dev_info(&ctrl_info->pci_dev->dev,
3636                                 "Online Firmware Activation ABORTED\n");
3637                 if (ctrl_info->soft_reset_handshake_supported)
3638                         pqi_clear_soft_reset_status(ctrl_info);
3639                 pqi_ofa_free_host_buffer(ctrl_info);
3640                 pqi_ctrl_ofa_done(ctrl_info);
3641                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3642                 break;
3643         case RESET_NORESPONSE:
3644                 fallthrough;
3645         default:
3646                 dev_err(&ctrl_info->pci_dev->dev,
3647                         "unexpected Online Firmware Activation reset status: 0x%x\n",
3648                         reset_status);
3649                 pqi_ofa_free_host_buffer(ctrl_info);
3650                 pqi_ctrl_ofa_done(ctrl_info);
3651                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3652                 pqi_take_ctrl_offline(ctrl_info, PQI_OFA_RESPONSE_TIMEOUT);
3653                 break;
3654         }
3655 }
3656
3657 static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
3658 {
3659         struct pqi_ctrl_info *ctrl_info;
3660
3661         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
3662
3663         pqi_ctrl_ofa_start(ctrl_info);
3664         pqi_ofa_setup_host_buffer(ctrl_info);
3665         pqi_ofa_host_memory_update(ctrl_info);
3666 }
3667
3668 static void pqi_ofa_quiesce_worker(struct work_struct *work)
3669 {
3670         struct pqi_ctrl_info *ctrl_info;
3671         struct pqi_event *event;
3672
3673         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
3674
3675         event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
3676
3677         pqi_ofa_ctrl_quiesce(ctrl_info);
3678         pqi_acknowledge_event(ctrl_info, event);
3679         pqi_process_soft_reset(ctrl_info);
3680 }
3681
3682 static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3683         struct pqi_event *event)
3684 {
3685         bool ack_event;
3686
3687         ack_event = true;
3688
3689         switch (event->event_id) {
3690         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3691                 dev_info(&ctrl_info->pci_dev->dev,
3692                         "received Online Firmware Activation memory allocation request\n");
3693                 schedule_work(&ctrl_info->ofa_memory_alloc_work);
3694                 break;
3695         case PQI_EVENT_OFA_QUIESCE:
3696                 dev_info(&ctrl_info->pci_dev->dev,
3697                         "received Online Firmware Activation quiesce request\n");
3698                 schedule_work(&ctrl_info->ofa_quiesce_work);
3699                 ack_event = false;
3700                 break;
3701         case PQI_EVENT_OFA_CANCELED:
3702                 dev_info(&ctrl_info->pci_dev->dev,
3703                         "received Online Firmware Activation cancel request: reason: %u\n",
3704                         ctrl_info->ofa_cancel_reason);
3705                 pqi_ofa_free_host_buffer(ctrl_info);
3706                 pqi_ctrl_ofa_done(ctrl_info);
3707                 break;
3708         default:
3709                 dev_err(&ctrl_info->pci_dev->dev,
3710                         "received unknown Online Firmware Activation request: event ID: %u\n",
3711                         event->event_id);
3712                 break;
3713         }
3714
3715         return ack_event;
3716 }
3717
3718 static void pqi_mark_volumes_for_rescan(struct pqi_ctrl_info *ctrl_info)
3719 {
3720         unsigned long flags;
3721         struct pqi_scsi_dev *device;
3722
3723         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
3724
3725         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
3726                 if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK)
3727                         device->rescan = true;
3728         }
3729
3730         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
3731 }
3732
3733 static void pqi_disable_raid_bypass(struct pqi_ctrl_info *ctrl_info)
3734 {
3735         unsigned long flags;
3736         struct pqi_scsi_dev *device;
3737
3738         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
3739
3740         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
3741                 if (device->raid_bypass_enabled)
3742                         device->raid_bypass_enabled = false;
3743
3744         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
3745 }
3746
3747 static void pqi_event_worker(struct work_struct *work)
3748 {
3749         unsigned int i;
3750         bool rescan_needed;
3751         struct pqi_ctrl_info *ctrl_info;
3752         struct pqi_event *event;
3753         bool ack_event;
3754
3755         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3756
3757         pqi_ctrl_busy(ctrl_info);
3758         pqi_wait_if_ctrl_blocked(ctrl_info);
3759         if (pqi_ctrl_offline(ctrl_info))
3760                 goto out;
3761
3762         rescan_needed = false;
3763         event = ctrl_info->events;
3764         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3765                 if (event->pending) {
3766                         event->pending = false;
3767                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3768                                 ack_event = pqi_ofa_process_event(ctrl_info, event);
3769                         } else {
3770                                 ack_event = true;
3771                                 rescan_needed = true;
3772                                 if (event->event_type == PQI_EVENT_TYPE_LOGICAL_DEVICE)
3773                                         pqi_mark_volumes_for_rescan(ctrl_info);
3774                                 else if (event->event_type == PQI_EVENT_TYPE_AIO_STATE_CHANGE)
3775                                         pqi_disable_raid_bypass(ctrl_info);
3776                         }
3777                         if (ack_event)
3778                                 pqi_acknowledge_event(ctrl_info, event);
3779                 }
3780                 event++;
3781         }
3782
3783 #define PQI_RESCAN_WORK_FOR_EVENT_DELAY         (5 * HZ)
3784
3785         if (rescan_needed)
3786                 pqi_schedule_rescan_worker_with_delay(ctrl_info,
3787                         PQI_RESCAN_WORK_FOR_EVENT_DELAY);
3788
3789 out:
3790         pqi_ctrl_unbusy(ctrl_info);
3791 }
3792
3793 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
3794
3795 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3796 {
3797         int num_interrupts;
3798         u32 heartbeat_count;
3799         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
3800
3801         pqi_check_ctrl_health(ctrl_info);
3802         if (pqi_ctrl_offline(ctrl_info))
3803                 return;
3804
3805         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3806         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3807
3808         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3809                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3810                         dev_err(&ctrl_info->pci_dev->dev,
3811                                 "no heartbeat detected - last heartbeat count: %u\n",
3812                                 heartbeat_count);
3813                         pqi_take_ctrl_offline(ctrl_info, PQI_NO_HEARTBEAT);
3814                         return;
3815                 }
3816         } else {
3817                 ctrl_info->previous_num_interrupts = num_interrupts;
3818         }
3819
3820         ctrl_info->previous_heartbeat_count = heartbeat_count;
3821         mod_timer(&ctrl_info->heartbeat_timer,
3822                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3823 }
3824
3825 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3826 {
3827         if (!ctrl_info->heartbeat_counter)
3828                 return;
3829
3830         ctrl_info->previous_num_interrupts =
3831                 atomic_read(&ctrl_info->num_interrupts);
3832         ctrl_info->previous_heartbeat_count =
3833                 pqi_read_heartbeat_counter(ctrl_info);
3834
3835         ctrl_info->heartbeat_timer.expires =
3836                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3837         add_timer(&ctrl_info->heartbeat_timer);
3838 }
3839
3840 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3841 {
3842         del_timer_sync(&ctrl_info->heartbeat_timer);
3843 }
3844
3845 static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
3846         struct pqi_event *event, struct pqi_event_response *response)
3847 {
3848         switch (event->event_id) {
3849         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3850                 ctrl_info->ofa_bytes_requested =
3851                         get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
3852                 break;
3853         case PQI_EVENT_OFA_CANCELED:
3854                 ctrl_info->ofa_cancel_reason =
3855                         get_unaligned_le16(&response->data.ofa_cancelled.reason);
3856                 break;
3857         }
3858 }
3859
3860 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3861 {
3862         int num_events;
3863         pqi_index_t oq_pi;
3864         pqi_index_t oq_ci;
3865         struct pqi_event_queue *event_queue;
3866         struct pqi_event_response *response;
3867         struct pqi_event *event;
3868         int event_index;
3869
3870         event_queue = &ctrl_info->event_queue;
3871         num_events = 0;
3872         oq_ci = event_queue->oq_ci_copy;
3873
3874         while (1) {
3875                 oq_pi = readl(event_queue->oq_pi);
3876                 if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3877                         pqi_invalid_response(ctrl_info, PQI_EVENT_PI_OUT_OF_RANGE);
3878                         dev_err(&ctrl_info->pci_dev->dev,
3879                                 "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3880                                 oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3881                         return -1;
3882                 }
3883
3884                 if (oq_pi == oq_ci)
3885                         break;
3886
3887                 num_events++;
3888                 response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3889
3890                 event_index = pqi_event_type_to_event_index(response->event_type);
3891
3892                 if (event_index >= 0 && response->request_acknowledge) {
3893                         event = &ctrl_info->events[event_index];
3894                         event->pending = true;
3895                         event->event_type = response->event_type;
3896                         event->event_id = get_unaligned_le16(&response->event_id);
3897                         event->additional_event_id =
3898                                 get_unaligned_le32(&response->additional_event_id);
3899                         if (event->event_type == PQI_EVENT_TYPE_OFA)
3900                                 pqi_ofa_capture_event_payload(ctrl_info, event, response);
3901                 }
3902
3903                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3904         }
3905
3906         if (num_events) {
3907                 event_queue->oq_ci_copy = oq_ci;
3908                 writel(oq_ci, event_queue->oq_ci);
3909                 schedule_work(&ctrl_info->event_work);
3910         }
3911
3912         return num_events;
3913 }
3914
3915 #define PQI_LEGACY_INTX_MASK    0x1
3916
3917 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
3918 {
3919         u32 intx_mask;
3920         struct pqi_device_registers __iomem *pqi_registers;
3921         volatile void __iomem *register_addr;
3922
3923         pqi_registers = ctrl_info->pqi_registers;
3924
3925         if (enable_intx)
3926                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3927         else
3928                 register_addr = &pqi_registers->legacy_intx_mask_set;
3929
3930         intx_mask = readl(register_addr);
3931         intx_mask |= PQI_LEGACY_INTX_MASK;
3932         writel(intx_mask, register_addr);
3933 }
3934
3935 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3936         enum pqi_irq_mode new_mode)
3937 {
3938         switch (ctrl_info->irq_mode) {
3939         case IRQ_MODE_MSIX:
3940                 switch (new_mode) {
3941                 case IRQ_MODE_MSIX:
3942                         break;
3943                 case IRQ_MODE_INTX:
3944                         pqi_configure_legacy_intx(ctrl_info, true);
3945                         sis_enable_intx(ctrl_info);
3946                         break;
3947                 case IRQ_MODE_NONE:
3948                         break;
3949                 }
3950                 break;
3951         case IRQ_MODE_INTX:
3952                 switch (new_mode) {
3953                 case IRQ_MODE_MSIX:
3954                         pqi_configure_legacy_intx(ctrl_info, false);
3955                         sis_enable_msix(ctrl_info);
3956                         break;
3957                 case IRQ_MODE_INTX:
3958                         break;
3959                 case IRQ_MODE_NONE:
3960                         pqi_configure_legacy_intx(ctrl_info, false);
3961                         break;
3962                 }
3963                 break;
3964         case IRQ_MODE_NONE:
3965                 switch (new_mode) {
3966                 case IRQ_MODE_MSIX:
3967                         sis_enable_msix(ctrl_info);
3968                         break;
3969                 case IRQ_MODE_INTX:
3970                         pqi_configure_legacy_intx(ctrl_info, true);
3971                         sis_enable_intx(ctrl_info);
3972                         break;
3973                 case IRQ_MODE_NONE:
3974                         break;
3975                 }
3976                 break;
3977         }
3978
3979         ctrl_info->irq_mode = new_mode;
3980 }
3981
3982 #define PQI_LEGACY_INTX_PENDING         0x1
3983
3984 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3985 {
3986         bool valid_irq;
3987         u32 intx_status;
3988
3989         switch (ctrl_info->irq_mode) {
3990         case IRQ_MODE_MSIX:
3991                 valid_irq = true;
3992                 break;
3993         case IRQ_MODE_INTX:
3994                 intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
3995                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3996                         valid_irq = true;
3997                 else
3998                         valid_irq = false;
3999                 break;
4000         case IRQ_MODE_NONE:
4001         default:
4002                 valid_irq = false;
4003                 break;
4004         }
4005
4006         return valid_irq;
4007 }
4008
4009 static irqreturn_t pqi_irq_handler(int irq, void *data)
4010 {
4011         struct pqi_ctrl_info *ctrl_info;
4012         struct pqi_queue_group *queue_group;
4013         int num_io_responses_handled;
4014         int num_events_handled;
4015
4016         queue_group = data;
4017         ctrl_info = queue_group->ctrl_info;
4018
4019         if (!pqi_is_valid_irq(ctrl_info))
4020                 return IRQ_NONE;
4021
4022         num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
4023         if (num_io_responses_handled < 0)
4024                 goto out;
4025
4026         if (irq == ctrl_info->event_irq) {
4027                 num_events_handled = pqi_process_event_intr(ctrl_info);
4028                 if (num_events_handled < 0)
4029                         goto out;
4030         } else {
4031                 num_events_handled = 0;
4032         }
4033
4034         if (num_io_responses_handled + num_events_handled > 0)
4035                 atomic_inc(&ctrl_info->num_interrupts);
4036
4037         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
4038         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
4039
4040 out:
4041         return IRQ_HANDLED;
4042 }
4043
4044 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
4045 {
4046         struct pci_dev *pci_dev = ctrl_info->pci_dev;
4047         int i;
4048         int rc;
4049
4050         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
4051
4052         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
4053                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
4054                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
4055                 if (rc) {
4056                         dev_err(&pci_dev->dev,
4057                                 "irq %u init failed with error %d\n",
4058                                 pci_irq_vector(pci_dev, i), rc);
4059                         return rc;
4060                 }
4061                 ctrl_info->num_msix_vectors_initialized++;
4062         }
4063
4064         return 0;
4065 }
4066
4067 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
4068 {
4069         int i;
4070
4071         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
4072                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
4073                         &ctrl_info->queue_groups[i]);
4074
4075         ctrl_info->num_msix_vectors_initialized = 0;
4076 }
4077
4078 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4079 {
4080         int num_vectors_enabled;
4081         unsigned int flags = PCI_IRQ_MSIX;
4082
4083         if (!pqi_disable_managed_interrupts)
4084                 flags |= PCI_IRQ_AFFINITY;
4085
4086         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
4087                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
4088                         flags);
4089         if (num_vectors_enabled < 0) {
4090                 dev_err(&ctrl_info->pci_dev->dev,
4091                         "MSI-X init failed with error %d\n",
4092                         num_vectors_enabled);
4093                 return num_vectors_enabled;
4094         }
4095
4096         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
4097         ctrl_info->irq_mode = IRQ_MODE_MSIX;
4098         return 0;
4099 }
4100
4101 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4102 {
4103         if (ctrl_info->num_msix_vectors_enabled) {
4104                 pci_free_irq_vectors(ctrl_info->pci_dev);
4105                 ctrl_info->num_msix_vectors_enabled = 0;
4106         }
4107 }
4108
4109 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
4110 {
4111         unsigned int i;
4112         size_t alloc_length;
4113         size_t element_array_length_per_iq;
4114         size_t element_array_length_per_oq;
4115         void *element_array;
4116         void __iomem *next_queue_index;
4117         void *aligned_pointer;
4118         unsigned int num_inbound_queues;
4119         unsigned int num_outbound_queues;
4120         unsigned int num_queue_indexes;
4121         struct pqi_queue_group *queue_group;
4122
4123         element_array_length_per_iq =
4124                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
4125                 ctrl_info->num_elements_per_iq;
4126         element_array_length_per_oq =
4127                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
4128                 ctrl_info->num_elements_per_oq;
4129         num_inbound_queues = ctrl_info->num_queue_groups * 2;
4130         num_outbound_queues = ctrl_info->num_queue_groups;
4131         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
4132
4133         aligned_pointer = NULL;
4134
4135         for (i = 0; i < num_inbound_queues; i++) {
4136                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4137                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4138                 aligned_pointer += element_array_length_per_iq;
4139         }
4140
4141         for (i = 0; i < num_outbound_queues; i++) {
4142                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4143                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4144                 aligned_pointer += element_array_length_per_oq;
4145         }
4146
4147         aligned_pointer = PTR_ALIGN(aligned_pointer,
4148                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4149         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4150                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4151
4152         for (i = 0; i < num_queue_indexes; i++) {
4153                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4154                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4155                 aligned_pointer += sizeof(pqi_index_t);
4156         }
4157
4158         alloc_length = (size_t)aligned_pointer +
4159                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4160
4161         alloc_length += PQI_EXTRA_SGL_MEMORY;
4162
4163         ctrl_info->queue_memory_base =
4164                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4165                                    &ctrl_info->queue_memory_base_dma_handle,
4166                                    GFP_KERNEL);
4167
4168         if (!ctrl_info->queue_memory_base)
4169                 return -ENOMEM;
4170
4171         ctrl_info->queue_memory_length = alloc_length;
4172
4173         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
4174                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4175
4176         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4177                 queue_group = &ctrl_info->queue_groups[i];
4178                 queue_group->iq_element_array[RAID_PATH] = element_array;
4179                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
4180                         ctrl_info->queue_memory_base_dma_handle +
4181                                 (element_array - ctrl_info->queue_memory_base);
4182                 element_array += element_array_length_per_iq;
4183                 element_array = PTR_ALIGN(element_array,
4184                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4185                 queue_group->iq_element_array[AIO_PATH] = element_array;
4186                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
4187                         ctrl_info->queue_memory_base_dma_handle +
4188                         (element_array - ctrl_info->queue_memory_base);
4189                 element_array += element_array_length_per_iq;
4190                 element_array = PTR_ALIGN(element_array,
4191                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4192         }
4193
4194         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4195                 queue_group = &ctrl_info->queue_groups[i];
4196                 queue_group->oq_element_array = element_array;
4197                 queue_group->oq_element_array_bus_addr =
4198                         ctrl_info->queue_memory_base_dma_handle +
4199                         (element_array - ctrl_info->queue_memory_base);
4200                 element_array += element_array_length_per_oq;
4201                 element_array = PTR_ALIGN(element_array,
4202                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4203         }
4204
4205         ctrl_info->event_queue.oq_element_array = element_array;
4206         ctrl_info->event_queue.oq_element_array_bus_addr =
4207                 ctrl_info->queue_memory_base_dma_handle +
4208                 (element_array - ctrl_info->queue_memory_base);
4209         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4210                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4211
4212         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
4213                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
4214
4215         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4216                 queue_group = &ctrl_info->queue_groups[i];
4217                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
4218                 queue_group->iq_ci_bus_addr[RAID_PATH] =
4219                         ctrl_info->queue_memory_base_dma_handle +
4220                         (next_queue_index -
4221                         (void __iomem *)ctrl_info->queue_memory_base);
4222                 next_queue_index += sizeof(pqi_index_t);
4223                 next_queue_index = PTR_ALIGN(next_queue_index,
4224                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4225                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
4226                 queue_group->iq_ci_bus_addr[AIO_PATH] =
4227                         ctrl_info->queue_memory_base_dma_handle +
4228                         (next_queue_index -
4229                         (void __iomem *)ctrl_info->queue_memory_base);
4230                 next_queue_index += sizeof(pqi_index_t);
4231                 next_queue_index = PTR_ALIGN(next_queue_index,
4232                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4233                 queue_group->oq_pi = next_queue_index;
4234                 queue_group->oq_pi_bus_addr =
4235                         ctrl_info->queue_memory_base_dma_handle +
4236                         (next_queue_index -
4237                         (void __iomem *)ctrl_info->queue_memory_base);
4238                 next_queue_index += sizeof(pqi_index_t);
4239                 next_queue_index = PTR_ALIGN(next_queue_index,
4240                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4241         }
4242
4243         ctrl_info->event_queue.oq_pi = next_queue_index;
4244         ctrl_info->event_queue.oq_pi_bus_addr =
4245                 ctrl_info->queue_memory_base_dma_handle +
4246                 (next_queue_index -
4247                 (void __iomem *)ctrl_info->queue_memory_base);
4248
4249         return 0;
4250 }
4251
4252 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
4253 {
4254         unsigned int i;
4255         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4256         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4257
4258         /*
4259          * Initialize the backpointers to the controller structure in
4260          * each operational queue group structure.
4261          */
4262         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4263                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
4264
4265         /*
4266          * Assign IDs to all operational queues.  Note that the IDs
4267          * assigned to operational IQs are independent of the IDs
4268          * assigned to operational OQs.
4269          */
4270         ctrl_info->event_queue.oq_id = next_oq_id++;
4271         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4272                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
4273                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
4274                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
4275         }
4276
4277         /*
4278          * Assign MSI-X table entry indexes to all queues.  Note that the
4279          * interrupt for the event queue is shared with the first queue group.
4280          */
4281         ctrl_info->event_queue.int_msg_num = 0;
4282         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4283                 ctrl_info->queue_groups[i].int_msg_num = i;
4284
4285         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4286                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
4287                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
4288                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
4289                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
4290         }
4291 }
4292
4293 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
4294 {
4295         size_t alloc_length;
4296         struct pqi_admin_queues_aligned *admin_queues_aligned;
4297         struct pqi_admin_queues *admin_queues;
4298
4299         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
4300                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4301
4302         ctrl_info->admin_queue_memory_base =
4303                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4304                                    &ctrl_info->admin_queue_memory_base_dma_handle,
4305                                    GFP_KERNEL);
4306
4307         if (!ctrl_info->admin_queue_memory_base)
4308                 return -ENOMEM;
4309
4310         ctrl_info->admin_queue_memory_length = alloc_length;
4311
4312         admin_queues = &ctrl_info->admin_queues;
4313         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
4314                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4315         admin_queues->iq_element_array =
4316                 &admin_queues_aligned->iq_element_array;
4317         admin_queues->oq_element_array =
4318                 &admin_queues_aligned->oq_element_array;
4319         admin_queues->iq_ci =
4320                 (pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
4321         admin_queues->oq_pi =
4322                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
4323
4324         admin_queues->iq_element_array_bus_addr =
4325                 ctrl_info->admin_queue_memory_base_dma_handle +
4326                 (admin_queues->iq_element_array -
4327                 ctrl_info->admin_queue_memory_base);
4328         admin_queues->oq_element_array_bus_addr =
4329                 ctrl_info->admin_queue_memory_base_dma_handle +
4330                 (admin_queues->oq_element_array -
4331                 ctrl_info->admin_queue_memory_base);
4332         admin_queues->iq_ci_bus_addr =
4333                 ctrl_info->admin_queue_memory_base_dma_handle +
4334                 ((void __iomem *)admin_queues->iq_ci -
4335                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4336         admin_queues->oq_pi_bus_addr =
4337                 ctrl_info->admin_queue_memory_base_dma_handle +
4338                 ((void __iomem *)admin_queues->oq_pi -
4339                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4340
4341         return 0;
4342 }
4343
4344 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
4345 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
4346
4347 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
4348 {
4349         struct pqi_device_registers __iomem *pqi_registers;
4350         struct pqi_admin_queues *admin_queues;
4351         unsigned long timeout;
4352         u8 status;
4353         u32 reg;
4354
4355         pqi_registers = ctrl_info->pqi_registers;
4356         admin_queues = &ctrl_info->admin_queues;
4357
4358         writeq((u64)admin_queues->iq_element_array_bus_addr,
4359                 &pqi_registers->admin_iq_element_array_addr);
4360         writeq((u64)admin_queues->oq_element_array_bus_addr,
4361                 &pqi_registers->admin_oq_element_array_addr);
4362         writeq((u64)admin_queues->iq_ci_bus_addr,
4363                 &pqi_registers->admin_iq_ci_addr);
4364         writeq((u64)admin_queues->oq_pi_bus_addr,
4365                 &pqi_registers->admin_oq_pi_addr);
4366
4367         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
4368                 (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
4369                 (admin_queues->int_msg_num << 16);
4370         writel(reg, &pqi_registers->admin_iq_num_elements);
4371
4372         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
4373                 &pqi_registers->function_and_status_code);
4374
4375         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
4376         while (1) {
4377                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
4378                 status = readb(&pqi_registers->function_and_status_code);
4379                 if (status == PQI_STATUS_IDLE)
4380                         break;
4381                 if (time_after(jiffies, timeout))
4382                         return -ETIMEDOUT;
4383         }
4384
4385         /*
4386          * The offset registers are not initialized to the correct
4387          * offsets until *after* the create admin queue pair command
4388          * completes successfully.
4389          */
4390         admin_queues->iq_pi = ctrl_info->iomem_base +
4391                 PQI_DEVICE_REGISTERS_OFFSET +
4392                 readq(&pqi_registers->admin_iq_pi_offset);
4393         admin_queues->oq_ci = ctrl_info->iomem_base +
4394                 PQI_DEVICE_REGISTERS_OFFSET +
4395                 readq(&pqi_registers->admin_oq_ci_offset);
4396
4397         return 0;
4398 }
4399
4400 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
4401         struct pqi_general_admin_request *request)
4402 {
4403         struct pqi_admin_queues *admin_queues;
4404         void *next_element;
4405         pqi_index_t iq_pi;
4406
4407         admin_queues = &ctrl_info->admin_queues;
4408         iq_pi = admin_queues->iq_pi_copy;
4409
4410         next_element = admin_queues->iq_element_array +
4411                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
4412
4413         memcpy(next_element, request, sizeof(*request));
4414
4415         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
4416         admin_queues->iq_pi_copy = iq_pi;
4417
4418         /*
4419          * This write notifies the controller that an IU is available to be
4420          * processed.
4421          */
4422         writel(iq_pi, admin_queues->iq_pi);
4423 }
4424
4425 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
4426
4427 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
4428         struct pqi_general_admin_response *response)
4429 {
4430         struct pqi_admin_queues *admin_queues;
4431         pqi_index_t oq_pi;
4432         pqi_index_t oq_ci;
4433         unsigned long timeout;
4434
4435         admin_queues = &ctrl_info->admin_queues;
4436         oq_ci = admin_queues->oq_ci_copy;
4437
4438         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
4439
4440         while (1) {
4441                 oq_pi = readl(admin_queues->oq_pi);
4442                 if (oq_pi != oq_ci)
4443                         break;
4444                 if (time_after(jiffies, timeout)) {
4445                         dev_err(&ctrl_info->pci_dev->dev,
4446                                 "timed out waiting for admin response\n");
4447                         return -ETIMEDOUT;
4448                 }
4449                 if (!sis_is_firmware_running(ctrl_info))
4450                         return -ENXIO;
4451                 usleep_range(1000, 2000);
4452         }
4453
4454         memcpy(response, admin_queues->oq_element_array +
4455                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
4456
4457         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
4458         admin_queues->oq_ci_copy = oq_ci;
4459         writel(oq_ci, admin_queues->oq_ci);
4460
4461         return 0;
4462 }
4463
4464 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
4465         struct pqi_queue_group *queue_group, enum pqi_io_path path,
4466         struct pqi_io_request *io_request)
4467 {
4468         struct pqi_io_request *next;
4469         void *next_element;
4470         pqi_index_t iq_pi;
4471         pqi_index_t iq_ci;
4472         size_t iu_length;
4473         unsigned long flags;
4474         unsigned int num_elements_needed;
4475         unsigned int num_elements_to_end_of_queue;
4476         size_t copy_count;
4477         struct pqi_iu_header *request;
4478
4479         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
4480
4481         if (io_request) {
4482                 io_request->queue_group = queue_group;
4483                 list_add_tail(&io_request->request_list_entry,
4484                         &queue_group->request_list[path]);
4485         }
4486
4487         iq_pi = queue_group->iq_pi_copy[path];
4488
4489         list_for_each_entry_safe(io_request, next,
4490                 &queue_group->request_list[path], request_list_entry) {
4491
4492                 request = io_request->iu;
4493
4494                 iu_length = get_unaligned_le16(&request->iu_length) +
4495                         PQI_REQUEST_HEADER_LENGTH;
4496                 num_elements_needed =
4497                         DIV_ROUND_UP(iu_length,
4498                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4499
4500                 iq_ci = readl(queue_group->iq_ci[path]);
4501
4502                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
4503                         ctrl_info->num_elements_per_iq))
4504                         break;
4505
4506                 put_unaligned_le16(queue_group->oq_id,
4507                         &request->response_queue_id);
4508
4509                 next_element = queue_group->iq_element_array[path] +
4510                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4511
4512                 num_elements_to_end_of_queue =
4513                         ctrl_info->num_elements_per_iq - iq_pi;
4514
4515                 if (num_elements_needed <= num_elements_to_end_of_queue) {
4516                         memcpy(next_element, request, iu_length);
4517                 } else {
4518                         copy_count = num_elements_to_end_of_queue *
4519                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4520                         memcpy(next_element, request, copy_count);
4521                         memcpy(queue_group->iq_element_array[path],
4522                                 (u8 *)request + copy_count,
4523                                 iu_length - copy_count);
4524                 }
4525
4526                 iq_pi = (iq_pi + num_elements_needed) %
4527                         ctrl_info->num_elements_per_iq;
4528
4529                 list_del(&io_request->request_list_entry);
4530         }
4531
4532         if (iq_pi != queue_group->iq_pi_copy[path]) {
4533                 queue_group->iq_pi_copy[path] = iq_pi;
4534                 /*
4535                  * This write notifies the controller that one or more IUs are
4536                  * available to be processed.
4537                  */
4538                 writel(iq_pi, queue_group->iq_pi[path]);
4539         }
4540
4541         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
4542 }
4543
4544 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
4545
4546 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
4547         struct completion *wait)
4548 {
4549         int rc;
4550
4551         while (1) {
4552                 if (wait_for_completion_io_timeout(wait,
4553                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
4554                         rc = 0;
4555                         break;
4556                 }
4557
4558                 pqi_check_ctrl_health(ctrl_info);
4559                 if (pqi_ctrl_offline(ctrl_info)) {
4560                         rc = -ENXIO;
4561                         break;
4562                 }
4563         }
4564
4565         return rc;
4566 }
4567
4568 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
4569         void *context)
4570 {
4571         struct completion *waiting = context;
4572
4573         complete(waiting);
4574 }
4575
4576 static int pqi_process_raid_io_error_synchronous(
4577         struct pqi_raid_error_info *error_info)
4578 {
4579         int rc = -EIO;
4580
4581         switch (error_info->data_out_result) {
4582         case PQI_DATA_IN_OUT_GOOD:
4583                 if (error_info->status == SAM_STAT_GOOD)
4584                         rc = 0;
4585                 break;
4586         case PQI_DATA_IN_OUT_UNDERFLOW:
4587                 if (error_info->status == SAM_STAT_GOOD ||
4588                         error_info->status == SAM_STAT_CHECK_CONDITION)
4589                         rc = 0;
4590                 break;
4591         case PQI_DATA_IN_OUT_ABORTED:
4592                 rc = PQI_CMD_STATUS_ABORTED;
4593                 break;
4594         }
4595
4596         return rc;
4597 }
4598
4599 static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
4600 {
4601         return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
4602 }
4603
4604 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4605         struct pqi_iu_header *request, unsigned int flags,
4606         struct pqi_raid_error_info *error_info)
4607 {
4608         int rc = 0;
4609         struct pqi_io_request *io_request;
4610         size_t iu_length;
4611         DECLARE_COMPLETION_ONSTACK(wait);
4612
4613         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4614                 if (down_interruptible(&ctrl_info->sync_request_sem))
4615                         return -ERESTARTSYS;
4616         } else {
4617                 down(&ctrl_info->sync_request_sem);
4618         }
4619
4620         pqi_ctrl_busy(ctrl_info);
4621         /*
4622          * Wait for other admin queue updates such as;
4623          * config table changes, OFA memory updates, ...
4624          */
4625         if (pqi_is_blockable_request(request))
4626                 pqi_wait_if_ctrl_blocked(ctrl_info);
4627
4628         if (pqi_ctrl_offline(ctrl_info)) {
4629                 rc = -ENXIO;
4630                 goto out;
4631         }
4632
4633         io_request = pqi_alloc_io_request(ctrl_info, NULL);
4634
4635         put_unaligned_le16(io_request->index,
4636                 &(((struct pqi_raid_path_request *)request)->request_id));
4637
4638         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4639                 ((struct pqi_raid_path_request *)request)->error_index =
4640                         ((struct pqi_raid_path_request *)request)->request_id;
4641
4642         iu_length = get_unaligned_le16(&request->iu_length) +
4643                 PQI_REQUEST_HEADER_LENGTH;
4644         memcpy(io_request->iu, request, iu_length);
4645
4646         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4647         io_request->context = &wait;
4648
4649         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4650                 io_request);
4651
4652         pqi_wait_for_completion_io(ctrl_info, &wait);
4653
4654         if (error_info) {
4655                 if (io_request->error_info)
4656                         memcpy(error_info, io_request->error_info, sizeof(*error_info));
4657                 else
4658                         memset(error_info, 0, sizeof(*error_info));
4659         } else if (rc == 0 && io_request->error_info) {
4660                 rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
4661         }
4662
4663         pqi_free_io_request(io_request);
4664
4665 out:
4666         pqi_ctrl_unbusy(ctrl_info);
4667         up(&ctrl_info->sync_request_sem);
4668
4669         return rc;
4670 }
4671
4672 static int pqi_validate_admin_response(
4673         struct pqi_general_admin_response *response, u8 expected_function_code)
4674 {
4675         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4676                 return -EINVAL;
4677
4678         if (get_unaligned_le16(&response->header.iu_length) !=
4679                 PQI_GENERAL_ADMIN_IU_LENGTH)
4680                 return -EINVAL;
4681
4682         if (response->function_code != expected_function_code)
4683                 return -EINVAL;
4684
4685         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4686                 return -EINVAL;
4687
4688         return 0;
4689 }
4690
4691 static int pqi_submit_admin_request_synchronous(
4692         struct pqi_ctrl_info *ctrl_info,
4693         struct pqi_general_admin_request *request,
4694         struct pqi_general_admin_response *response)
4695 {
4696         int rc;
4697
4698         pqi_submit_admin_request(ctrl_info, request);
4699
4700         rc = pqi_poll_for_admin_response(ctrl_info, response);
4701
4702         if (rc == 0)
4703                 rc = pqi_validate_admin_response(response, request->function_code);
4704
4705         return rc;
4706 }
4707
4708 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4709 {
4710         int rc;
4711         struct pqi_general_admin_request request;
4712         struct pqi_general_admin_response response;
4713         struct pqi_device_capability *capability;
4714         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4715
4716         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4717         if (!capability)
4718                 return -ENOMEM;
4719
4720         memset(&request, 0, sizeof(request));
4721
4722         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4723         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4724                 &request.header.iu_length);
4725         request.function_code =
4726                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4727         put_unaligned_le32(sizeof(*capability),
4728                 &request.data.report_device_capability.buffer_length);
4729
4730         rc = pqi_map_single(ctrl_info->pci_dev,
4731                 &request.data.report_device_capability.sg_descriptor,
4732                 capability, sizeof(*capability),
4733                 DMA_FROM_DEVICE);
4734         if (rc)
4735                 goto out;
4736
4737         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
4738
4739         pqi_pci_unmap(ctrl_info->pci_dev,
4740                 &request.data.report_device_capability.sg_descriptor, 1,
4741                 DMA_FROM_DEVICE);
4742
4743         if (rc)
4744                 goto out;
4745
4746         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4747                 rc = -EIO;
4748                 goto out;
4749         }
4750
4751         ctrl_info->max_inbound_queues =
4752                 get_unaligned_le16(&capability->max_inbound_queues);
4753         ctrl_info->max_elements_per_iq =
4754                 get_unaligned_le16(&capability->max_elements_per_iq);
4755         ctrl_info->max_iq_element_length =
4756                 get_unaligned_le16(&capability->max_iq_element_length)
4757                 * 16;
4758         ctrl_info->max_outbound_queues =
4759                 get_unaligned_le16(&capability->max_outbound_queues);
4760         ctrl_info->max_elements_per_oq =
4761                 get_unaligned_le16(&capability->max_elements_per_oq);
4762         ctrl_info->max_oq_element_length =
4763                 get_unaligned_le16(&capability->max_oq_element_length)
4764                 * 16;
4765
4766         sop_iu_layer_descriptor =
4767                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4768
4769         ctrl_info->max_inbound_iu_length_per_firmware =
4770                 get_unaligned_le16(
4771                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4772         ctrl_info->inbound_spanning_supported =
4773                 sop_iu_layer_descriptor->inbound_spanning_supported;
4774         ctrl_info->outbound_spanning_supported =
4775                 sop_iu_layer_descriptor->outbound_spanning_supported;
4776
4777 out:
4778         kfree(capability);
4779
4780         return rc;
4781 }
4782
4783 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4784 {
4785         if (ctrl_info->max_iq_element_length <
4786                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4787                 dev_err(&ctrl_info->pci_dev->dev,
4788                         "max. inbound queue element length of %d is less than the required length of %d\n",
4789                         ctrl_info->max_iq_element_length,
4790                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4791                 return -EINVAL;
4792         }
4793
4794         if (ctrl_info->max_oq_element_length <
4795                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4796                 dev_err(&ctrl_info->pci_dev->dev,
4797                         "max. outbound queue element length of %d is less than the required length of %d\n",
4798                         ctrl_info->max_oq_element_length,
4799                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4800                 return -EINVAL;
4801         }
4802
4803         if (ctrl_info->max_inbound_iu_length_per_firmware <
4804                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4805                 dev_err(&ctrl_info->pci_dev->dev,
4806                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4807                         ctrl_info->max_inbound_iu_length_per_firmware,
4808                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4809                 return -EINVAL;
4810         }
4811
4812         if (!ctrl_info->inbound_spanning_supported) {
4813                 dev_err(&ctrl_info->pci_dev->dev,
4814                         "the controller does not support inbound spanning\n");
4815                 return -EINVAL;
4816         }
4817
4818         if (ctrl_info->outbound_spanning_supported) {
4819                 dev_err(&ctrl_info->pci_dev->dev,
4820                         "the controller supports outbound spanning but this driver does not\n");
4821                 return -EINVAL;
4822         }
4823
4824         return 0;
4825 }
4826
4827 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4828 {
4829         int rc;
4830         struct pqi_event_queue *event_queue;
4831         struct pqi_general_admin_request request;
4832         struct pqi_general_admin_response response;
4833
4834         event_queue = &ctrl_info->event_queue;
4835
4836         /*
4837          * Create OQ (Outbound Queue - device to host queue) to dedicate
4838          * to events.
4839          */
4840         memset(&request, 0, sizeof(request));
4841         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4842         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4843                 &request.header.iu_length);
4844         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4845         put_unaligned_le16(event_queue->oq_id,
4846                 &request.data.create_operational_oq.queue_id);
4847         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4848                 &request.data.create_operational_oq.element_array_addr);
4849         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4850                 &request.data.create_operational_oq.pi_addr);
4851         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4852                 &request.data.create_operational_oq.num_elements);
4853         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4854                 &request.data.create_operational_oq.element_length);
4855         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4856         put_unaligned_le16(event_queue->int_msg_num,
4857                 &request.data.create_operational_oq.int_msg_num);
4858
4859         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4860                 &response);
4861         if (rc)
4862                 return rc;
4863
4864         event_queue->oq_ci = ctrl_info->iomem_base +
4865                 PQI_DEVICE_REGISTERS_OFFSET +
4866                 get_unaligned_le64(
4867                         &response.data.create_operational_oq.oq_ci_offset);
4868
4869         return 0;
4870 }
4871
4872 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4873         unsigned int group_number)
4874 {
4875         int rc;
4876         struct pqi_queue_group *queue_group;
4877         struct pqi_general_admin_request request;
4878         struct pqi_general_admin_response response;
4879
4880         queue_group = &ctrl_info->queue_groups[group_number];
4881
4882         /*
4883          * Create IQ (Inbound Queue - host to device queue) for
4884          * RAID path.
4885          */
4886         memset(&request, 0, sizeof(request));
4887         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4888         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4889                 &request.header.iu_length);
4890         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4891         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4892                 &request.data.create_operational_iq.queue_id);
4893         put_unaligned_le64(
4894                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4895                 &request.data.create_operational_iq.element_array_addr);
4896         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4897                 &request.data.create_operational_iq.ci_addr);
4898         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4899                 &request.data.create_operational_iq.num_elements);
4900         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4901                 &request.data.create_operational_iq.element_length);
4902         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4903
4904         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4905                 &response);
4906         if (rc) {
4907                 dev_err(&ctrl_info->pci_dev->dev,
4908                         "error creating inbound RAID queue\n");
4909                 return rc;
4910         }
4911
4912         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4913                 PQI_DEVICE_REGISTERS_OFFSET +
4914                 get_unaligned_le64(
4915                         &response.data.create_operational_iq.iq_pi_offset);
4916
4917         /*
4918          * Create IQ (Inbound Queue - host to device queue) for
4919          * Advanced I/O (AIO) path.
4920          */
4921         memset(&request, 0, sizeof(request));
4922         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4923         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4924                 &request.header.iu_length);
4925         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4926         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4927                 &request.data.create_operational_iq.queue_id);
4928         put_unaligned_le64((u64)queue_group->
4929                 iq_element_array_bus_addr[AIO_PATH],
4930                 &request.data.create_operational_iq.element_array_addr);
4931         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4932                 &request.data.create_operational_iq.ci_addr);
4933         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4934                 &request.data.create_operational_iq.num_elements);
4935         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4936                 &request.data.create_operational_iq.element_length);
4937         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4938
4939         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4940                 &response);
4941         if (rc) {
4942                 dev_err(&ctrl_info->pci_dev->dev,
4943                         "error creating inbound AIO queue\n");
4944                 return rc;
4945         }
4946
4947         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4948                 PQI_DEVICE_REGISTERS_OFFSET +
4949                 get_unaligned_le64(
4950                         &response.data.create_operational_iq.iq_pi_offset);
4951
4952         /*
4953          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4954          * assumed to be for RAID path I/O unless we change the queue's
4955          * property.
4956          */
4957         memset(&request, 0, sizeof(request));
4958         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4959         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4960                 &request.header.iu_length);
4961         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4962         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4963                 &request.data.change_operational_iq_properties.queue_id);
4964         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4965                 &request.data.change_operational_iq_properties.vendor_specific);
4966
4967         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4968                 &response);
4969         if (rc) {
4970                 dev_err(&ctrl_info->pci_dev->dev,
4971                         "error changing queue property\n");
4972                 return rc;
4973         }
4974
4975         /*
4976          * Create OQ (Outbound Queue - device to host queue).
4977          */
4978         memset(&request, 0, sizeof(request));
4979         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4980         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4981                 &request.header.iu_length);
4982         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4983         put_unaligned_le16(queue_group->oq_id,
4984                 &request.data.create_operational_oq.queue_id);
4985         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4986                 &request.data.create_operational_oq.element_array_addr);
4987         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4988                 &request.data.create_operational_oq.pi_addr);
4989         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4990                 &request.data.create_operational_oq.num_elements);
4991         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4992                 &request.data.create_operational_oq.element_length);
4993         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4994         put_unaligned_le16(queue_group->int_msg_num,
4995                 &request.data.create_operational_oq.int_msg_num);
4996
4997         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4998                 &response);
4999         if (rc) {
5000                 dev_err(&ctrl_info->pci_dev->dev,
5001                         "error creating outbound queue\n");
5002                 return rc;
5003         }
5004
5005         queue_group->oq_ci = ctrl_info->iomem_base +
5006                 PQI_DEVICE_REGISTERS_OFFSET +
5007                 get_unaligned_le64(
5008                         &response.data.create_operational_oq.oq_ci_offset);
5009
5010         return 0;
5011 }
5012
5013 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
5014 {
5015         int rc;
5016         unsigned int i;
5017
5018         rc = pqi_create_event_queue(ctrl_info);
5019         if (rc) {
5020                 dev_err(&ctrl_info->pci_dev->dev,
5021                         "error creating event queue\n");
5022                 return rc;
5023         }
5024
5025         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5026                 rc = pqi_create_queue_group(ctrl_info, i);
5027                 if (rc) {
5028                         dev_err(&ctrl_info->pci_dev->dev,
5029                                 "error creating queue group number %u/%u\n",
5030                                 i, ctrl_info->num_queue_groups);
5031                         return rc;
5032                 }
5033         }
5034
5035         return 0;
5036 }
5037
5038 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
5039         struct_size_t(struct pqi_event_config,  descriptors, PQI_MAX_EVENT_DESCRIPTORS)
5040
5041 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
5042         bool enable_events)
5043 {
5044         int rc;
5045         unsigned int i;
5046         struct pqi_event_config *event_config;
5047         struct pqi_event_descriptor *event_descriptor;
5048         struct pqi_general_management_request request;
5049
5050         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5051                 GFP_KERNEL);
5052         if (!event_config)
5053                 return -ENOMEM;
5054
5055         memset(&request, 0, sizeof(request));
5056
5057         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
5058         put_unaligned_le16(offsetof(struct pqi_general_management_request,
5059                 data.report_event_configuration.sg_descriptors[1]) -
5060                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5061         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5062                 &request.data.report_event_configuration.buffer_length);
5063
5064         rc = pqi_map_single(ctrl_info->pci_dev,
5065                 request.data.report_event_configuration.sg_descriptors,
5066                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5067                 DMA_FROM_DEVICE);
5068         if (rc)
5069                 goto out;
5070
5071         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5072
5073         pqi_pci_unmap(ctrl_info->pci_dev,
5074                 request.data.report_event_configuration.sg_descriptors, 1,
5075                 DMA_FROM_DEVICE);
5076
5077         if (rc)
5078                 goto out;
5079
5080         for (i = 0; i < event_config->num_event_descriptors; i++) {
5081                 event_descriptor = &event_config->descriptors[i];
5082                 if (enable_events &&
5083                         pqi_is_supported_event(event_descriptor->event_type))
5084                                 put_unaligned_le16(ctrl_info->event_queue.oq_id,
5085                                         &event_descriptor->oq_id);
5086                 else
5087                         put_unaligned_le16(0, &event_descriptor->oq_id);
5088         }
5089
5090         memset(&request, 0, sizeof(request));
5091
5092         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
5093         put_unaligned_le16(offsetof(struct pqi_general_management_request,
5094                 data.report_event_configuration.sg_descriptors[1]) -
5095                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5096         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5097                 &request.data.report_event_configuration.buffer_length);
5098
5099         rc = pqi_map_single(ctrl_info->pci_dev,
5100                 request.data.report_event_configuration.sg_descriptors,
5101                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5102                 DMA_TO_DEVICE);
5103         if (rc)
5104                 goto out;
5105
5106         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5107
5108         pqi_pci_unmap(ctrl_info->pci_dev,
5109                 request.data.report_event_configuration.sg_descriptors, 1,
5110                 DMA_TO_DEVICE);
5111
5112 out:
5113         kfree(event_config);
5114
5115         return rc;
5116 }
5117
5118 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
5119 {
5120         return pqi_configure_events(ctrl_info, true);
5121 }
5122
5123 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
5124 {
5125         unsigned int i;
5126         struct device *dev;
5127         size_t sg_chain_buffer_length;
5128         struct pqi_io_request *io_request;
5129
5130         if (!ctrl_info->io_request_pool)
5131                 return;
5132
5133         dev = &ctrl_info->pci_dev->dev;
5134         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5135         io_request = ctrl_info->io_request_pool;
5136
5137         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5138                 kfree(io_request->iu);
5139                 if (!io_request->sg_chain_buffer)
5140                         break;
5141                 dma_free_coherent(dev, sg_chain_buffer_length,
5142                         io_request->sg_chain_buffer,
5143                         io_request->sg_chain_buffer_dma_handle);
5144                 io_request++;
5145         }
5146
5147         kfree(ctrl_info->io_request_pool);
5148         ctrl_info->io_request_pool = NULL;
5149 }
5150
5151 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
5152 {
5153         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
5154                                      ctrl_info->error_buffer_length,
5155                                      &ctrl_info->error_buffer_dma_handle,
5156                                      GFP_KERNEL);
5157         if (!ctrl_info->error_buffer)
5158                 return -ENOMEM;
5159
5160         return 0;
5161 }
5162
5163 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
5164 {
5165         unsigned int i;
5166         void *sg_chain_buffer;
5167         size_t sg_chain_buffer_length;
5168         dma_addr_t sg_chain_buffer_dma_handle;
5169         struct device *dev;
5170         struct pqi_io_request *io_request;
5171
5172         ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
5173                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
5174
5175         if (!ctrl_info->io_request_pool) {
5176                 dev_err(&ctrl_info->pci_dev->dev,
5177                         "failed to allocate I/O request pool\n");
5178                 goto error;
5179         }
5180
5181         dev = &ctrl_info->pci_dev->dev;
5182         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5183         io_request = ctrl_info->io_request_pool;
5184
5185         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5186                 io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
5187
5188                 if (!io_request->iu) {
5189                         dev_err(&ctrl_info->pci_dev->dev,
5190                                 "failed to allocate IU buffers\n");
5191                         goto error;
5192                 }
5193
5194                 sg_chain_buffer = dma_alloc_coherent(dev,
5195                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
5196                         GFP_KERNEL);
5197
5198                 if (!sg_chain_buffer) {
5199                         dev_err(&ctrl_info->pci_dev->dev,
5200                                 "failed to allocate PQI scatter-gather chain buffers\n");
5201                         goto error;
5202                 }
5203
5204                 io_request->index = i;
5205                 io_request->sg_chain_buffer = sg_chain_buffer;
5206                 io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
5207                 io_request++;
5208         }
5209
5210         return 0;
5211
5212 error:
5213         pqi_free_all_io_requests(ctrl_info);
5214
5215         return -ENOMEM;
5216 }
5217
5218 /*
5219  * Calculate required resources that are sized based on max. outstanding
5220  * requests and max. transfer size.
5221  */
5222
5223 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
5224 {
5225         u32 max_transfer_size;
5226         u32 max_sg_entries;
5227
5228         ctrl_info->scsi_ml_can_queue =
5229                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
5230         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
5231
5232         ctrl_info->error_buffer_length =
5233                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
5234
5235         if (reset_devices)
5236                 max_transfer_size = min(ctrl_info->max_transfer_size,
5237                         PQI_MAX_TRANSFER_SIZE_KDUMP);
5238         else
5239                 max_transfer_size = min(ctrl_info->max_transfer_size,
5240                         PQI_MAX_TRANSFER_SIZE);
5241
5242         max_sg_entries = max_transfer_size / PAGE_SIZE;
5243
5244         /* +1 to cover when the buffer is not page-aligned. */
5245         max_sg_entries++;
5246
5247         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
5248
5249         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
5250
5251         ctrl_info->sg_chain_buffer_length =
5252                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
5253                 PQI_EXTRA_SGL_MEMORY;
5254         ctrl_info->sg_tablesize = max_sg_entries;
5255         ctrl_info->max_sectors = max_transfer_size / 512;
5256 }
5257
5258 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
5259 {
5260         int num_queue_groups;
5261         u16 num_elements_per_iq;
5262         u16 num_elements_per_oq;
5263
5264         if (reset_devices) {
5265                 num_queue_groups = 1;
5266         } else {
5267                 int num_cpus;
5268                 int max_queue_groups;
5269
5270                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
5271                         ctrl_info->max_outbound_queues - 1);
5272                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
5273
5274                 num_cpus = num_online_cpus();
5275                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
5276                 num_queue_groups = min(num_queue_groups, max_queue_groups);
5277         }
5278
5279         ctrl_info->num_queue_groups = num_queue_groups;
5280
5281         /*
5282          * Make sure that the max. inbound IU length is an even multiple
5283          * of our inbound element length.
5284          */
5285         ctrl_info->max_inbound_iu_length =
5286                 (ctrl_info->max_inbound_iu_length_per_firmware /
5287                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
5288                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
5289
5290         num_elements_per_iq =
5291                 (ctrl_info->max_inbound_iu_length /
5292                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
5293
5294         /* Add one because one element in each queue is unusable. */
5295         num_elements_per_iq++;
5296
5297         num_elements_per_iq = min(num_elements_per_iq,
5298                 ctrl_info->max_elements_per_iq);
5299
5300         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
5301         num_elements_per_oq = min(num_elements_per_oq,
5302                 ctrl_info->max_elements_per_oq);
5303
5304         ctrl_info->num_elements_per_iq = num_elements_per_iq;
5305         ctrl_info->num_elements_per_oq = num_elements_per_oq;
5306
5307         ctrl_info->max_sg_per_iu =
5308                 ((ctrl_info->max_inbound_iu_length -
5309                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5310                 sizeof(struct pqi_sg_descriptor)) +
5311                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
5312
5313         ctrl_info->max_sg_per_r56_iu =
5314                 ((ctrl_info->max_inbound_iu_length -
5315                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5316                 sizeof(struct pqi_sg_descriptor)) +
5317                 PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
5318 }
5319
5320 static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
5321         struct scatterlist *sg)
5322 {
5323         u64 address = (u64)sg_dma_address(sg);
5324         unsigned int length = sg_dma_len(sg);
5325
5326         put_unaligned_le64(address, &sg_descriptor->address);
5327         put_unaligned_le32(length, &sg_descriptor->length);
5328         put_unaligned_le32(0, &sg_descriptor->flags);
5329 }
5330
5331 static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
5332         struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
5333         int max_sg_per_iu, bool *chained)
5334 {
5335         int i;
5336         unsigned int num_sg_in_iu;
5337
5338         *chained = false;
5339         i = 0;
5340         num_sg_in_iu = 0;
5341         max_sg_per_iu--;        /* Subtract 1 to leave room for chain marker. */
5342
5343         while (1) {
5344                 pqi_set_sg_descriptor(sg_descriptor, sg);
5345                 if (!*chained)
5346                         num_sg_in_iu++;
5347                 i++;
5348                 if (i == sg_count)
5349                         break;
5350                 sg_descriptor++;
5351                 if (i == max_sg_per_iu) {
5352                         put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
5353                                 &sg_descriptor->address);
5354                         put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
5355                                 &sg_descriptor->length);
5356                         put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
5357                         *chained = true;
5358                         num_sg_in_iu++;
5359                         sg_descriptor = io_request->sg_chain_buffer;
5360                 }
5361                 sg = sg_next(sg);
5362         }
5363
5364         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
5365
5366         return num_sg_in_iu;
5367 }
5368
5369 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
5370         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
5371         struct pqi_io_request *io_request)
5372 {
5373         u16 iu_length;
5374         int sg_count;
5375         bool chained;
5376         unsigned int num_sg_in_iu;
5377         struct scatterlist *sg;
5378         struct pqi_sg_descriptor *sg_descriptor;
5379
5380         sg_count = scsi_dma_map(scmd);
5381         if (sg_count < 0)
5382                 return sg_count;
5383
5384         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5385                 PQI_REQUEST_HEADER_LENGTH;
5386
5387         if (sg_count == 0)
5388                 goto out;
5389
5390         sg = scsi_sglist(scmd);
5391         sg_descriptor = request->sg_descriptors;
5392
5393         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5394                 ctrl_info->max_sg_per_iu, &chained);
5395
5396         request->partial = chained;
5397         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5398
5399 out:
5400         put_unaligned_le16(iu_length, &request->header.iu_length);
5401
5402         return 0;
5403 }
5404
5405 static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
5406         struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
5407         struct pqi_io_request *io_request)
5408 {
5409         u16 iu_length;
5410         int sg_count;
5411         bool chained;
5412         unsigned int num_sg_in_iu;
5413         struct scatterlist *sg;
5414         struct pqi_sg_descriptor *sg_descriptor;
5415
5416         sg_count = scsi_dma_map(scmd);
5417         if (sg_count < 0)
5418                 return sg_count;
5419
5420         iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
5421                 PQI_REQUEST_HEADER_LENGTH;
5422         num_sg_in_iu = 0;
5423
5424         if (sg_count == 0)
5425                 goto out;
5426
5427         sg = scsi_sglist(scmd);
5428         sg_descriptor = request->sg_descriptors;
5429
5430         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5431                 ctrl_info->max_sg_per_iu, &chained);
5432
5433         request->partial = chained;
5434         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5435
5436 out:
5437         put_unaligned_le16(iu_length, &request->header.iu_length);
5438         request->num_sg_descriptors = num_sg_in_iu;
5439
5440         return 0;
5441 }
5442
5443 static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
5444         struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
5445         struct pqi_io_request *io_request)
5446 {
5447         u16 iu_length;
5448         int sg_count;
5449         bool chained;
5450         unsigned int num_sg_in_iu;
5451         struct scatterlist *sg;
5452         struct pqi_sg_descriptor *sg_descriptor;
5453
5454         sg_count = scsi_dma_map(scmd);
5455         if (sg_count < 0)
5456                 return sg_count;
5457
5458         iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
5459                 PQI_REQUEST_HEADER_LENGTH;
5460         num_sg_in_iu = 0;
5461
5462         if (sg_count != 0) {
5463                 sg = scsi_sglist(scmd);
5464                 sg_descriptor = request->sg_descriptors;
5465
5466                 num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5467                         ctrl_info->max_sg_per_r56_iu, &chained);
5468
5469                 request->partial = chained;
5470                 iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5471         }
5472
5473         put_unaligned_le16(iu_length, &request->header.iu_length);
5474         request->num_sg_descriptors = num_sg_in_iu;
5475
5476         return 0;
5477 }
5478
5479 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
5480         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
5481         struct pqi_io_request *io_request)
5482 {
5483         u16 iu_length;
5484         int sg_count;
5485         bool chained;
5486         unsigned int num_sg_in_iu;
5487         struct scatterlist *sg;
5488         struct pqi_sg_descriptor *sg_descriptor;
5489
5490         sg_count = scsi_dma_map(scmd);
5491         if (sg_count < 0)
5492                 return sg_count;
5493
5494         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
5495                 PQI_REQUEST_HEADER_LENGTH;
5496         num_sg_in_iu = 0;
5497
5498         if (sg_count == 0)
5499                 goto out;
5500
5501         sg = scsi_sglist(scmd);
5502         sg_descriptor = request->sg_descriptors;
5503
5504         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5505                 ctrl_info->max_sg_per_iu, &chained);
5506
5507         request->partial = chained;
5508         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5509
5510 out:
5511         put_unaligned_le16(iu_length, &request->header.iu_length);
5512         request->num_sg_descriptors = num_sg_in_iu;
5513
5514         return 0;
5515 }
5516
5517 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
5518         void *context)
5519 {
5520         struct scsi_cmnd *scmd;
5521
5522         scmd = io_request->scmd;
5523         pqi_free_io_request(io_request);
5524         scsi_dma_unmap(scmd);
5525         pqi_scsi_done(scmd);
5526 }
5527
5528 static int pqi_raid_submit_io(struct pqi_ctrl_info *ctrl_info,
5529         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5530         struct pqi_queue_group *queue_group, bool io_high_prio)
5531 {
5532         int rc;
5533         size_t cdb_length;
5534         struct pqi_io_request *io_request;
5535         struct pqi_raid_path_request *request;
5536
5537         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5538         if (!io_request)
5539                 return SCSI_MLQUEUE_HOST_BUSY;
5540
5541         io_request->io_complete_callback = pqi_raid_io_complete;
5542         io_request->scmd = scmd;
5543
5544         request = io_request->iu;
5545         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5546
5547         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5548         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5549         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5550         request->command_priority = io_high_prio;
5551         put_unaligned_le16(io_request->index, &request->request_id);
5552         request->error_index = request->request_id;
5553         memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
5554         request->ml_device_lun_number = (u8)scmd->device->lun;
5555
5556         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
5557         memcpy(request->cdb, scmd->cmnd, cdb_length);
5558
5559         switch (cdb_length) {
5560         case 6:
5561         case 10:
5562         case 12:
5563         case 16:
5564                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5565                 break;
5566         case 20:
5567                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
5568                 break;
5569         case 24:
5570                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
5571                 break;
5572         case 28:
5573                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
5574                 break;
5575         case 32:
5576         default:
5577                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
5578                 break;
5579         }
5580
5581         switch (scmd->sc_data_direction) {
5582         case DMA_FROM_DEVICE:
5583                 request->data_direction = SOP_READ_FLAG;
5584                 break;
5585         case DMA_TO_DEVICE:
5586                 request->data_direction = SOP_WRITE_FLAG;
5587                 break;
5588         case DMA_NONE:
5589                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5590                 break;
5591         case DMA_BIDIRECTIONAL:
5592                 request->data_direction = SOP_BIDIRECTIONAL;
5593                 break;
5594         default:
5595                 dev_err(&ctrl_info->pci_dev->dev,
5596                         "unknown data direction: %d\n",
5597                         scmd->sc_data_direction);
5598                 break;
5599         }
5600
5601         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5602         if (rc) {
5603                 pqi_free_io_request(io_request);
5604                 return SCSI_MLQUEUE_HOST_BUSY;
5605         }
5606
5607         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5608
5609         return 0;
5610 }
5611
5612 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5613         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5614         struct pqi_queue_group *queue_group)
5615 {
5616         bool io_high_prio;
5617
5618         io_high_prio = pqi_is_io_high_priority(device, scmd);
5619
5620         return pqi_raid_submit_io(ctrl_info, device, scmd, queue_group, io_high_prio);
5621 }
5622
5623 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5624 {
5625         struct scsi_cmnd *scmd;
5626         struct pqi_scsi_dev *device;
5627         struct pqi_ctrl_info *ctrl_info;
5628
5629         if (!io_request->raid_bypass)
5630                 return false;
5631
5632         scmd = io_request->scmd;
5633         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5634                 return false;
5635         if (host_byte(scmd->result) == DID_NO_CONNECT)
5636                 return false;
5637
5638         device = scmd->device->hostdata;
5639         if (pqi_device_offline(device) || pqi_device_in_remove(device))
5640                 return false;
5641
5642         ctrl_info = shost_to_hba(scmd->device->host);
5643         if (pqi_ctrl_offline(ctrl_info))
5644                 return false;
5645
5646         return true;
5647 }
5648
5649 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5650         void *context)
5651 {
5652         struct scsi_cmnd *scmd;
5653
5654         scmd = io_request->scmd;
5655         scsi_dma_unmap(scmd);
5656         if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
5657                 set_host_byte(scmd, DID_IMM_RETRY);
5658                 pqi_cmd_priv(scmd)->this_residual++;
5659         }
5660
5661         pqi_free_io_request(io_request);
5662         pqi_scsi_done(scmd);
5663 }
5664
5665 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5666         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5667         struct pqi_queue_group *queue_group)
5668 {
5669         bool io_high_prio;
5670
5671         io_high_prio = pqi_is_io_high_priority(device, scmd);
5672
5673         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5674                 scmd->cmnd, scmd->cmd_len, queue_group, NULL,
5675                 false, io_high_prio);
5676 }
5677
5678 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5679         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5680         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5681         struct pqi_encryption_info *encryption_info, bool raid_bypass,
5682         bool io_high_prio)
5683 {
5684         int rc;
5685         struct pqi_io_request *io_request;
5686         struct pqi_aio_path_request *request;
5687
5688         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5689         if (!io_request)
5690                 return SCSI_MLQUEUE_HOST_BUSY;
5691
5692         io_request->io_complete_callback = pqi_aio_io_complete;
5693         io_request->scmd = scmd;
5694         io_request->raid_bypass = raid_bypass;
5695
5696         request = io_request->iu;
5697         memset(request, 0, offsetof(struct pqi_aio_path_request, sg_descriptors));
5698
5699         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5700         put_unaligned_le32(aio_handle, &request->nexus_id);
5701         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5702         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5703         request->command_priority = io_high_prio;
5704         put_unaligned_le16(io_request->index, &request->request_id);
5705         request->error_index = request->request_id;
5706         if (!raid_bypass && ctrl_info->multi_lun_device_supported)
5707                 put_unaligned_le64(scmd->device->lun << 8, &request->lun_number);
5708         if (cdb_length > sizeof(request->cdb))
5709                 cdb_length = sizeof(request->cdb);
5710         request->cdb_length = cdb_length;
5711         memcpy(request->cdb, cdb, cdb_length);
5712
5713         switch (scmd->sc_data_direction) {
5714         case DMA_TO_DEVICE:
5715                 request->data_direction = SOP_READ_FLAG;
5716                 break;
5717         case DMA_FROM_DEVICE:
5718                 request->data_direction = SOP_WRITE_FLAG;
5719                 break;
5720         case DMA_NONE:
5721                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5722                 break;
5723         case DMA_BIDIRECTIONAL:
5724                 request->data_direction = SOP_BIDIRECTIONAL;
5725                 break;
5726         default:
5727                 dev_err(&ctrl_info->pci_dev->dev,
5728                         "unknown data direction: %d\n",
5729                         scmd->sc_data_direction);
5730                 break;
5731         }
5732
5733         if (encryption_info) {
5734                 request->encryption_enable = true;
5735                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5736                         &request->data_encryption_key_index);
5737                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5738                         &request->encrypt_tweak_lower);
5739                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5740                         &request->encrypt_tweak_upper);
5741         }
5742
5743         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5744         if (rc) {
5745                 pqi_free_io_request(io_request);
5746                 return SCSI_MLQUEUE_HOST_BUSY;
5747         }
5748
5749         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5750
5751         return 0;
5752 }
5753
5754 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
5755         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5756         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5757         struct pqi_scsi_dev_raid_map_data *rmd)
5758 {
5759         int rc;
5760         struct pqi_io_request *io_request;
5761         struct pqi_aio_r1_path_request *r1_request;
5762
5763         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5764         if (!io_request)
5765                 return SCSI_MLQUEUE_HOST_BUSY;
5766
5767         io_request->io_complete_callback = pqi_aio_io_complete;
5768         io_request->scmd = scmd;
5769         io_request->raid_bypass = true;
5770
5771         r1_request = io_request->iu;
5772         memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
5773
5774         r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
5775         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
5776         r1_request->num_drives = rmd->num_it_nexus_entries;
5777         put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
5778         put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
5779         if (rmd->num_it_nexus_entries == 3)
5780                 put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
5781
5782         put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
5783         r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5784         put_unaligned_le16(io_request->index, &r1_request->request_id);
5785         r1_request->error_index = r1_request->request_id;
5786         if (rmd->cdb_length > sizeof(r1_request->cdb))
5787                 rmd->cdb_length = sizeof(r1_request->cdb);
5788         r1_request->cdb_length = rmd->cdb_length;
5789         memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
5790
5791         /* The direction is always write. */
5792         r1_request->data_direction = SOP_READ_FLAG;
5793
5794         if (encryption_info) {
5795                 r1_request->encryption_enable = true;
5796                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5797                                 &r1_request->data_encryption_key_index);
5798                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5799                                 &r1_request->encrypt_tweak_lower);
5800                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5801                                 &r1_request->encrypt_tweak_upper);
5802         }
5803
5804         rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
5805         if (rc) {
5806                 pqi_free_io_request(io_request);
5807                 return SCSI_MLQUEUE_HOST_BUSY;
5808         }
5809
5810         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5811
5812         return 0;
5813 }
5814
5815 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
5816         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5817         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5818         struct pqi_scsi_dev_raid_map_data *rmd)
5819 {
5820         int rc;
5821         struct pqi_io_request *io_request;
5822         struct pqi_aio_r56_path_request *r56_request;
5823
5824         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5825         if (!io_request)
5826                 return SCSI_MLQUEUE_HOST_BUSY;
5827         io_request->io_complete_callback = pqi_aio_io_complete;
5828         io_request->scmd = scmd;
5829         io_request->raid_bypass = true;
5830
5831         r56_request = io_request->iu;
5832         memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
5833
5834         if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
5835                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
5836         else
5837                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
5838
5839         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
5840         put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
5841         put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
5842         if (rmd->raid_level == SA_RAID_6) {
5843                 put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
5844                 r56_request->xor_multiplier = rmd->xor_mult;
5845         }
5846         put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
5847         r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5848         put_unaligned_le64(rmd->row, &r56_request->row);
5849
5850         put_unaligned_le16(io_request->index, &r56_request->request_id);
5851         r56_request->error_index = r56_request->request_id;
5852
5853         if (rmd->cdb_length > sizeof(r56_request->cdb))
5854                 rmd->cdb_length = sizeof(r56_request->cdb);
5855         r56_request->cdb_length = rmd->cdb_length;
5856         memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
5857
5858         /* The direction is always write. */
5859         r56_request->data_direction = SOP_READ_FLAG;
5860
5861         if (encryption_info) {
5862                 r56_request->encryption_enable = true;
5863                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5864                                 &r56_request->data_encryption_key_index);
5865                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5866                                 &r56_request->encrypt_tweak_lower);
5867                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5868                                 &r56_request->encrypt_tweak_upper);
5869         }
5870
5871         rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
5872         if (rc) {
5873                 pqi_free_io_request(io_request);
5874                 return SCSI_MLQUEUE_HOST_BUSY;
5875         }
5876
5877         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5878
5879         return 0;
5880 }
5881
5882 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5883         struct scsi_cmnd *scmd)
5884 {
5885         /*
5886          * We are setting host_tagset = 1 during init.
5887          */
5888         return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
5889 }
5890
5891 static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
5892 {
5893         if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
5894                 return false;
5895
5896         return pqi_cmd_priv(scmd)->this_residual == 0;
5897 }
5898
5899 /*
5900  * This function gets called just before we hand the completed SCSI request
5901  * back to the SML.
5902  */
5903
5904 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5905 {
5906         struct pqi_scsi_dev *device;
5907         struct completion *wait;
5908
5909         if (!scmd->device) {
5910                 set_host_byte(scmd, DID_NO_CONNECT);
5911                 return;
5912         }
5913
5914         device = scmd->device->hostdata;
5915         if (!device) {
5916                 set_host_byte(scmd, DID_NO_CONNECT);
5917                 return;
5918         }
5919
5920         atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
5921
5922         wait = (struct completion *)xchg(&scmd->host_scribble, NULL);
5923         if (wait != PQI_NO_COMPLETION)
5924                 complete(wait);
5925 }
5926
5927 static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
5928         struct scsi_cmnd *scmd)
5929 {
5930         u32 oldest_jiffies;
5931         u8 lru_index;
5932         int i;
5933         int rc;
5934         struct pqi_scsi_dev *device;
5935         struct pqi_stream_data *pqi_stream_data;
5936         struct pqi_scsi_dev_raid_map_data rmd;
5937
5938         if (!ctrl_info->enable_stream_detection)
5939                 return false;
5940
5941         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
5942         if (rc)
5943                 return false;
5944
5945         /* Check writes only. */
5946         if (!rmd.is_write)
5947                 return false;
5948
5949         device = scmd->device->hostdata;
5950
5951         /* Check for RAID 5/6 streams. */
5952         if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
5953                 return false;
5954
5955         /*
5956          * If controller does not support AIO RAID{5,6} writes, need to send
5957          * requests down non-AIO path.
5958          */
5959         if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
5960                 (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
5961                 return true;
5962
5963         lru_index = 0;
5964         oldest_jiffies = INT_MAX;
5965         for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
5966                 pqi_stream_data = &device->stream_data[i];
5967                 /*
5968                  * Check for adjacent request or request is within
5969                  * the previous request.
5970                  */
5971                 if ((pqi_stream_data->next_lba &&
5972                         rmd.first_block >= pqi_stream_data->next_lba) &&
5973                         rmd.first_block <= pqi_stream_data->next_lba +
5974                                 rmd.block_cnt) {
5975                         pqi_stream_data->next_lba = rmd.first_block +
5976                                 rmd.block_cnt;
5977                         pqi_stream_data->last_accessed = jiffies;
5978                         return true;
5979                 }
5980
5981                 /* unused entry */
5982                 if (pqi_stream_data->last_accessed == 0) {
5983                         lru_index = i;
5984                         break;
5985                 }
5986
5987                 /* Find entry with oldest last accessed time. */
5988                 if (pqi_stream_data->last_accessed <= oldest_jiffies) {
5989                         oldest_jiffies = pqi_stream_data->last_accessed;
5990                         lru_index = i;
5991                 }
5992         }
5993
5994         /* Set LRU entry. */
5995         pqi_stream_data = &device->stream_data[lru_index];
5996         pqi_stream_data->last_accessed = jiffies;
5997         pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
5998
5999         return false;
6000 }
6001
6002 static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
6003 {
6004         int rc;
6005         struct pqi_ctrl_info *ctrl_info;
6006         struct pqi_scsi_dev *device;
6007         u16 hw_queue;
6008         struct pqi_queue_group *queue_group;
6009         bool raid_bypassed;
6010         u8 lun;
6011
6012         scmd->host_scribble = PQI_NO_COMPLETION;
6013
6014         device = scmd->device->hostdata;
6015
6016         if (!device) {
6017                 set_host_byte(scmd, DID_NO_CONNECT);
6018                 pqi_scsi_done(scmd);
6019                 return 0;
6020         }
6021
6022         lun = (u8)scmd->device->lun;
6023
6024         atomic_inc(&device->scsi_cmds_outstanding[lun]);
6025
6026         ctrl_info = shost_to_hba(shost);
6027
6028         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
6029                 set_host_byte(scmd, DID_NO_CONNECT);
6030                 pqi_scsi_done(scmd);
6031                 return 0;
6032         }
6033
6034         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device, lun)) {
6035                 rc = SCSI_MLQUEUE_HOST_BUSY;
6036                 goto out;
6037         }
6038
6039         /*
6040          * This is necessary because the SML doesn't zero out this field during
6041          * error recovery.
6042          */
6043         scmd->result = 0;
6044
6045         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
6046         queue_group = &ctrl_info->queue_groups[hw_queue];
6047
6048         if (pqi_is_logical_device(device)) {
6049                 raid_bypassed = false;
6050                 if (device->raid_bypass_enabled &&
6051                         pqi_is_bypass_eligible_request(scmd) &&
6052                         !pqi_is_parity_write_stream(ctrl_info, scmd)) {
6053                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6054                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
6055                                 raid_bypassed = true;
6056                                 device->raid_bypass_cnt++;
6057                         }
6058                 }
6059                 if (!raid_bypassed)
6060                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6061         } else {
6062                 if (device->aio_enabled)
6063                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6064                 else
6065                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6066         }
6067
6068 out:
6069         if (rc) {
6070                 scmd->host_scribble = NULL;
6071                 atomic_dec(&device->scsi_cmds_outstanding[lun]);
6072         }
6073
6074         return rc;
6075 }
6076
6077 static unsigned int pqi_queued_io_count(struct pqi_ctrl_info *ctrl_info)
6078 {
6079         unsigned int i;
6080         unsigned int path;
6081         unsigned long flags;
6082         unsigned int queued_io_count;
6083         struct pqi_queue_group *queue_group;
6084         struct pqi_io_request *io_request;
6085
6086         queued_io_count = 0;
6087
6088         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6089                 queue_group = &ctrl_info->queue_groups[i];
6090                 for (path = 0; path < 2; path++) {
6091                         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
6092                         list_for_each_entry(io_request, &queue_group->request_list[path], request_list_entry)
6093                                 queued_io_count++;
6094                         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
6095                 }
6096         }
6097
6098         return queued_io_count;
6099 }
6100
6101 static unsigned int pqi_nonempty_inbound_queue_count(struct pqi_ctrl_info *ctrl_info)
6102 {
6103         unsigned int i;
6104         unsigned int path;
6105         unsigned int nonempty_inbound_queue_count;
6106         struct pqi_queue_group *queue_group;
6107         pqi_index_t iq_pi;
6108         pqi_index_t iq_ci;
6109
6110         nonempty_inbound_queue_count = 0;
6111
6112         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6113                 queue_group = &ctrl_info->queue_groups[i];
6114                 for (path = 0; path < 2; path++) {
6115                         iq_pi = queue_group->iq_pi_copy[path];
6116                         iq_ci = readl(queue_group->iq_ci[path]);
6117                         if (iq_ci != iq_pi)
6118                                 nonempty_inbound_queue_count++;
6119                 }
6120         }
6121
6122         return nonempty_inbound_queue_count;
6123 }
6124
6125 #define PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS        10
6126
6127 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
6128 {
6129         unsigned long start_jiffies;
6130         unsigned long warning_timeout;
6131         unsigned int queued_io_count;
6132         unsigned int nonempty_inbound_queue_count;
6133         bool displayed_warning;
6134
6135         displayed_warning = false;
6136         start_jiffies = jiffies;
6137         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6138
6139         while (1) {
6140                 queued_io_count = pqi_queued_io_count(ctrl_info);
6141                 nonempty_inbound_queue_count = pqi_nonempty_inbound_queue_count(ctrl_info);
6142                 if (queued_io_count == 0 && nonempty_inbound_queue_count == 0)
6143                         break;
6144                 pqi_check_ctrl_health(ctrl_info);
6145                 if (pqi_ctrl_offline(ctrl_info))
6146                         return -ENXIO;
6147                 if (time_after(jiffies, warning_timeout)) {
6148                         dev_warn(&ctrl_info->pci_dev->dev,
6149                                 "waiting %u seconds for queued I/O to drain (queued I/O count: %u; non-empty inbound queue count: %u)\n",
6150                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000, queued_io_count, nonempty_inbound_queue_count);
6151                         displayed_warning = true;
6152                         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6153                 }
6154                 usleep_range(1000, 2000);
6155         }
6156
6157         if (displayed_warning)
6158                 dev_warn(&ctrl_info->pci_dev->dev,
6159                         "queued I/O drained after waiting for %u seconds\n",
6160                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
6161
6162         return 0;
6163 }
6164
6165 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
6166         struct pqi_scsi_dev *device, u8 lun)
6167 {
6168         unsigned int i;
6169         unsigned int path;
6170         struct pqi_queue_group *queue_group;
6171         unsigned long flags;
6172         struct pqi_io_request *io_request;
6173         struct pqi_io_request *next;
6174         struct scsi_cmnd *scmd;
6175         struct pqi_scsi_dev *scsi_device;
6176
6177         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6178                 queue_group = &ctrl_info->queue_groups[i];
6179
6180                 for (path = 0; path < 2; path++) {
6181                         spin_lock_irqsave(
6182                                 &queue_group->submit_lock[path], flags);
6183
6184                         list_for_each_entry_safe(io_request, next,
6185                                 &queue_group->request_list[path],
6186                                 request_list_entry) {
6187
6188                                 scmd = io_request->scmd;
6189                                 if (!scmd)
6190                                         continue;
6191
6192                                 scsi_device = scmd->device->hostdata;
6193                                 if (scsi_device != device)
6194                                         continue;
6195
6196                                 if ((u8)scmd->device->lun != lun)
6197                                         continue;
6198
6199                                 list_del(&io_request->request_list_entry);
6200                                 set_host_byte(scmd, DID_RESET);
6201                                 pqi_free_io_request(io_request);
6202                                 scsi_dma_unmap(scmd);
6203                                 pqi_scsi_done(scmd);
6204                         }
6205
6206                         spin_unlock_irqrestore(
6207                                 &queue_group->submit_lock[path], flags);
6208                 }
6209         }
6210 }
6211
6212 #define PQI_PENDING_IO_WARNING_TIMEOUT_SECS     10
6213
6214 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
6215         struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs)
6216 {
6217         int cmds_outstanding;
6218         unsigned long start_jiffies;
6219         unsigned long warning_timeout;
6220         unsigned long msecs_waiting;
6221
6222         start_jiffies = jiffies;
6223         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6224
6225         while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun])) > 0) {
6226                 if (ctrl_info->ctrl_removal_state != PQI_CTRL_GRACEFUL_REMOVAL) {
6227                         pqi_check_ctrl_health(ctrl_info);
6228                         if (pqi_ctrl_offline(ctrl_info))
6229                                 return -ENXIO;
6230                 }
6231                 msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
6232                 if (msecs_waiting >= timeout_msecs) {
6233                         dev_err(&ctrl_info->pci_dev->dev,
6234                                 "scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
6235                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6236                                 lun, msecs_waiting / 1000, cmds_outstanding);
6237                         return -ETIMEDOUT;
6238                 }
6239                 if (time_after(jiffies, warning_timeout)) {
6240                         dev_warn(&ctrl_info->pci_dev->dev,
6241                                 "scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
6242                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6243                                 lun, msecs_waiting / 1000, cmds_outstanding);
6244                         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6245                 }
6246                 usleep_range(1000, 2000);
6247         }
6248
6249         return 0;
6250 }
6251
6252 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
6253         void *context)
6254 {
6255         struct completion *waiting = context;
6256
6257         complete(waiting);
6258 }
6259
6260 #define PQI_LUN_RESET_POLL_COMPLETION_SECS      10
6261
6262 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
6263         struct pqi_scsi_dev *device, u8 lun, struct completion *wait)
6264 {
6265         int rc;
6266         unsigned int wait_secs;
6267         int cmds_outstanding;
6268
6269         wait_secs = 0;
6270
6271         while (1) {
6272                 if (wait_for_completion_io_timeout(wait,
6273                         PQI_LUN_RESET_POLL_COMPLETION_SECS * HZ)) {
6274                         rc = 0;
6275                         break;
6276                 }
6277
6278                 pqi_check_ctrl_health(ctrl_info);
6279                 if (pqi_ctrl_offline(ctrl_info)) {
6280                         rc = -ENXIO;
6281                         break;
6282                 }
6283
6284                 wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
6285                 cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun]);
6286                 dev_warn(&ctrl_info->pci_dev->dev,
6287                         "scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete (%d command(s) outstanding)\n",
6288                         ctrl_info->scsi_host->host_no, device->bus, device->target, lun, wait_secs, cmds_outstanding);
6289         }
6290
6291         return rc;
6292 }
6293
6294 #define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS     30
6295
6296 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device, u8 lun)
6297 {
6298         int rc;
6299         struct pqi_io_request *io_request;
6300         DECLARE_COMPLETION_ONSTACK(wait);
6301         struct pqi_task_management_request *request;
6302
6303         io_request = pqi_alloc_io_request(ctrl_info, NULL);
6304         io_request->io_complete_callback = pqi_lun_reset_complete;
6305         io_request->context = &wait;
6306
6307         request = io_request->iu;
6308         memset(request, 0, sizeof(*request));
6309
6310         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
6311         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
6312                 &request->header.iu_length);
6313         put_unaligned_le16(io_request->index, &request->request_id);
6314         memcpy(request->lun_number, device->scsi3addr,
6315                 sizeof(request->lun_number));
6316         if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
6317                 request->ml_device_lun_number = lun;
6318         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
6319         if (ctrl_info->tmf_iu_timeout_supported)
6320                 put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
6321
6322         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
6323                 io_request);
6324
6325         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, lun, &wait);
6326         if (rc == 0)
6327                 rc = io_request->status;
6328
6329         pqi_free_io_request(io_request);
6330
6331         return rc;
6332 }
6333
6334 #define PQI_LUN_RESET_RETRIES                           3
6335 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS              (10 * 1000)
6336 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS          (10 * 60 * 1000)
6337 #define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS   (2 * 60 * 1000)
6338
6339 static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device, u8 lun)
6340 {
6341         int reset_rc;
6342         int wait_rc;
6343         unsigned int retries;
6344         unsigned long timeout_msecs;
6345
6346         for (retries = 0;;) {
6347                 reset_rc = pqi_lun_reset(ctrl_info, device, lun);
6348                 if (reset_rc == 0 || reset_rc == -ENODEV || reset_rc == -ENXIO || ++retries > PQI_LUN_RESET_RETRIES)
6349                         break;
6350                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
6351         }
6352
6353         timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
6354                 PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
6355
6356         wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun, timeout_msecs);
6357         if (wait_rc && reset_rc == 0)
6358                 reset_rc = wait_rc;
6359
6360         return reset_rc == 0 ? SUCCESS : FAILED;
6361 }
6362
6363 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device, u8 lun)
6364 {
6365         int rc;
6366
6367         pqi_ctrl_block_requests(ctrl_info);
6368         pqi_ctrl_wait_until_quiesced(ctrl_info);
6369         pqi_fail_io_queued_for_device(ctrl_info, device, lun);
6370         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
6371         pqi_device_reset_start(device, lun);
6372         pqi_ctrl_unblock_requests(ctrl_info);
6373         if (rc)
6374                 rc = FAILED;
6375         else
6376                 rc = pqi_lun_reset_with_retries(ctrl_info, device, lun);
6377         pqi_device_reset_done(device, lun);
6378
6379         return rc;
6380 }
6381
6382 static int pqi_device_reset_handler(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device, u8 lun, struct scsi_cmnd *scmd, u8 scsi_opcode)
6383 {
6384         int rc;
6385
6386         mutex_lock(&ctrl_info->lun_reset_mutex);
6387
6388         dev_err(&ctrl_info->pci_dev->dev,
6389                 "resetting scsi %d:%d:%d:%u SCSI cmd at %p due to cmd opcode 0x%02x\n",
6390                 ctrl_info->scsi_host->host_no, device->bus, device->target, lun, scmd, scsi_opcode);
6391
6392         pqi_check_ctrl_health(ctrl_info);
6393         if (pqi_ctrl_offline(ctrl_info))
6394                 rc = FAILED;
6395         else
6396                 rc = pqi_device_reset(ctrl_info, device, lun);
6397
6398         dev_err(&ctrl_info->pci_dev->dev,
6399                 "reset of scsi %d:%d:%d:%u: %s\n",
6400                 ctrl_info->scsi_host->host_no, device->bus, device->target, lun,
6401                 rc == SUCCESS ? "SUCCESS" : "FAILED");
6402
6403         mutex_unlock(&ctrl_info->lun_reset_mutex);
6404
6405         return rc;
6406 }
6407
6408 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
6409 {
6410         struct Scsi_Host *shost;
6411         struct pqi_ctrl_info *ctrl_info;
6412         struct pqi_scsi_dev *device;
6413         u8 scsi_opcode;
6414
6415         shost = scmd->device->host;
6416         ctrl_info = shost_to_hba(shost);
6417         device = scmd->device->hostdata;
6418         scsi_opcode = scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff;
6419
6420         return pqi_device_reset_handler(ctrl_info, device, (u8)scmd->device->lun, scmd, scsi_opcode);
6421 }
6422
6423 static void pqi_tmf_worker(struct work_struct *work)
6424 {
6425         struct pqi_tmf_work *tmf_work;
6426         struct scsi_cmnd *scmd;
6427
6428         tmf_work = container_of(work, struct pqi_tmf_work, work_struct);
6429         scmd = (struct scsi_cmnd *)xchg(&tmf_work->scmd, NULL);
6430
6431         pqi_device_reset_handler(tmf_work->ctrl_info, tmf_work->device, tmf_work->lun, scmd, tmf_work->scsi_opcode);
6432 }
6433
6434 static int pqi_eh_abort_handler(struct scsi_cmnd *scmd)
6435 {
6436         struct Scsi_Host *shost;
6437         struct pqi_ctrl_info *ctrl_info;
6438         struct pqi_scsi_dev *device;
6439         struct pqi_tmf_work *tmf_work;
6440         DECLARE_COMPLETION_ONSTACK(wait);
6441
6442         shost = scmd->device->host;
6443         ctrl_info = shost_to_hba(shost);
6444         device = scmd->device->hostdata;
6445
6446         dev_err(&ctrl_info->pci_dev->dev,
6447                 "attempting TASK ABORT on scsi %d:%d:%d:%d for SCSI cmd at %p\n",
6448                 shost->host_no, device->bus, device->target, (int)scmd->device->lun, scmd);
6449
6450         if (cmpxchg(&scmd->host_scribble, PQI_NO_COMPLETION, (void *)&wait) == NULL) {
6451                 dev_err(&ctrl_info->pci_dev->dev,
6452                         "scsi %d:%d:%d:%d for SCSI cmd at %p already completed\n",
6453                         shost->host_no, device->bus, device->target, (int)scmd->device->lun, scmd);
6454                 scmd->result = DID_RESET << 16;
6455                 goto out;
6456         }
6457
6458         tmf_work = &device->tmf_work[scmd->device->lun];
6459
6460         if (cmpxchg(&tmf_work->scmd, NULL, scmd) == NULL) {
6461                 tmf_work->ctrl_info = ctrl_info;
6462                 tmf_work->device = device;
6463                 tmf_work->lun = (u8)scmd->device->lun;
6464                 tmf_work->scsi_opcode = scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff;
6465                 schedule_work(&tmf_work->work_struct);
6466         }
6467
6468         wait_for_completion(&wait);
6469
6470         dev_err(&ctrl_info->pci_dev->dev,
6471                 "TASK ABORT on scsi %d:%d:%d:%d for SCSI cmd at %p: SUCCESS\n",
6472                 shost->host_no, device->bus, device->target, (int)scmd->device->lun, scmd);
6473
6474 out:
6475
6476         return SUCCESS;
6477 }
6478
6479 static int pqi_slave_alloc(struct scsi_device *sdev)
6480 {
6481         struct pqi_scsi_dev *device;
6482         unsigned long flags;
6483         struct pqi_ctrl_info *ctrl_info;
6484         struct scsi_target *starget;
6485         struct sas_rphy *rphy;
6486
6487         ctrl_info = shost_to_hba(sdev->host);
6488
6489         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6490
6491         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
6492                 starget = scsi_target(sdev);
6493                 rphy = target_to_rphy(starget);
6494                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
6495                 if (device) {
6496                         if (device->target_lun_valid) {
6497                                 device->ignore_device = true;
6498                         } else {
6499                                 device->target = sdev_id(sdev);
6500                                 device->lun = sdev->lun;
6501                                 device->target_lun_valid = true;
6502                         }
6503                 }
6504         } else {
6505                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
6506                         sdev_id(sdev), sdev->lun);
6507         }
6508
6509         if (device) {
6510                 sdev->hostdata = device;
6511                 device->sdev = sdev;
6512                 if (device->queue_depth) {
6513                         device->advertised_queue_depth = device->queue_depth;
6514                         scsi_change_queue_depth(sdev,
6515                                 device->advertised_queue_depth);
6516                 }
6517                 if (pqi_is_logical_device(device)) {
6518                         pqi_disable_write_same(sdev);
6519                 } else {
6520                         sdev->allow_restart = 1;
6521                         if (device->device_type == SA_DEVICE_TYPE_NVME)
6522                                 pqi_disable_write_same(sdev);
6523                 }
6524         }
6525
6526         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6527
6528         return 0;
6529 }
6530
6531 static void pqi_map_queues(struct Scsi_Host *shost)
6532 {
6533         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6534
6535         if (!ctrl_info->disable_managed_interrupts)
6536                 return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
6537                               ctrl_info->pci_dev, 0);
6538         else
6539                 return blk_mq_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT]);
6540 }
6541
6542 static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
6543 {
6544         return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
6545 }
6546
6547 static int pqi_slave_configure(struct scsi_device *sdev)
6548 {
6549         int rc = 0;
6550         struct pqi_scsi_dev *device;
6551
6552         device = sdev->hostdata;
6553         device->devtype = sdev->type;
6554
6555         if (pqi_is_tape_changer_device(device) && device->ignore_device) {
6556                 rc = -ENXIO;
6557                 device->ignore_device = false;
6558         }
6559
6560         return rc;
6561 }
6562
6563 static void pqi_slave_destroy(struct scsi_device *sdev)
6564 {
6565         struct pqi_ctrl_info *ctrl_info;
6566         struct pqi_scsi_dev *device;
6567         int mutex_acquired;
6568         unsigned long flags;
6569
6570         ctrl_info = shost_to_hba(sdev->host);
6571
6572         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
6573         if (!mutex_acquired)
6574                 return;
6575
6576         device = sdev->hostdata;
6577         if (!device) {
6578                 mutex_unlock(&ctrl_info->scan_mutex);
6579                 return;
6580         }
6581
6582         device->lun_count--;
6583         if (device->lun_count > 0) {
6584                 mutex_unlock(&ctrl_info->scan_mutex);
6585                 return;
6586         }
6587
6588         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6589         list_del(&device->scsi_device_list_entry);
6590         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6591
6592         mutex_unlock(&ctrl_info->scan_mutex);
6593
6594         pqi_dev_info(ctrl_info, "removed", device);
6595         pqi_free_device(device);
6596 }
6597
6598 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6599 {
6600         struct pci_dev *pci_dev;
6601         u32 subsystem_vendor;
6602         u32 subsystem_device;
6603         cciss_pci_info_struct pci_info;
6604
6605         if (!arg)
6606                 return -EINVAL;
6607
6608         pci_dev = ctrl_info->pci_dev;
6609
6610         pci_info.domain = pci_domain_nr(pci_dev->bus);
6611         pci_info.bus = pci_dev->bus->number;
6612         pci_info.dev_fn = pci_dev->devfn;
6613         subsystem_vendor = pci_dev->subsystem_vendor;
6614         subsystem_device = pci_dev->subsystem_device;
6615         pci_info.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
6616
6617         if (copy_to_user(arg, &pci_info, sizeof(pci_info)))
6618                 return -EFAULT;
6619
6620         return 0;
6621 }
6622
6623 static int pqi_getdrivver_ioctl(void __user *arg)
6624 {
6625         u32 version;
6626
6627         if (!arg)
6628                 return -EINVAL;
6629
6630         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
6631                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
6632
6633         if (copy_to_user(arg, &version, sizeof(version)))
6634                 return -EFAULT;
6635
6636         return 0;
6637 }
6638
6639 struct ciss_error_info {
6640         u8      scsi_status;
6641         int     command_status;
6642         size_t  sense_data_length;
6643 };
6644
6645 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
6646         struct ciss_error_info *ciss_error_info)
6647 {
6648         int ciss_cmd_status;
6649         size_t sense_data_length;
6650
6651         switch (pqi_error_info->data_out_result) {
6652         case PQI_DATA_IN_OUT_GOOD:
6653                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
6654                 break;
6655         case PQI_DATA_IN_OUT_UNDERFLOW:
6656                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
6657                 break;
6658         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
6659                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
6660                 break;
6661         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
6662         case PQI_DATA_IN_OUT_BUFFER_ERROR:
6663         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
6664         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
6665         case PQI_DATA_IN_OUT_ERROR:
6666                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
6667                 break;
6668         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
6669         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
6670         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
6671         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
6672         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
6673         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
6674         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
6675         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
6676         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
6677         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
6678                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
6679                 break;
6680         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
6681                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
6682                 break;
6683         case PQI_DATA_IN_OUT_ABORTED:
6684                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
6685                 break;
6686         case PQI_DATA_IN_OUT_TIMEOUT:
6687                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
6688                 break;
6689         default:
6690                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
6691                 break;
6692         }
6693
6694         sense_data_length =
6695                 get_unaligned_le16(&pqi_error_info->sense_data_length);
6696         if (sense_data_length == 0)
6697                 sense_data_length =
6698                 get_unaligned_le16(&pqi_error_info->response_data_length);
6699         if (sense_data_length)
6700                 if (sense_data_length > sizeof(pqi_error_info->data))
6701                         sense_data_length = sizeof(pqi_error_info->data);
6702
6703         ciss_error_info->scsi_status = pqi_error_info->status;
6704         ciss_error_info->command_status = ciss_cmd_status;
6705         ciss_error_info->sense_data_length = sense_data_length;
6706 }
6707
6708 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6709 {
6710         int rc;
6711         char *kernel_buffer = NULL;
6712         u16 iu_length;
6713         size_t sense_data_length;
6714         IOCTL_Command_struct iocommand;
6715         struct pqi_raid_path_request request;
6716         struct pqi_raid_error_info pqi_error_info;
6717         struct ciss_error_info ciss_error_info;
6718
6719         if (pqi_ctrl_offline(ctrl_info))
6720                 return -ENXIO;
6721         if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
6722                 return -EBUSY;
6723         if (!arg)
6724                 return -EINVAL;
6725         if (!capable(CAP_SYS_RAWIO))
6726                 return -EPERM;
6727         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
6728                 return -EFAULT;
6729         if (iocommand.buf_size < 1 &&
6730                 iocommand.Request.Type.Direction != XFER_NONE)
6731                 return -EINVAL;
6732         if (iocommand.Request.CDBLen > sizeof(request.cdb))
6733                 return -EINVAL;
6734         if (iocommand.Request.Type.Type != TYPE_CMD)
6735                 return -EINVAL;
6736
6737         switch (iocommand.Request.Type.Direction) {
6738         case XFER_NONE:
6739         case XFER_WRITE:
6740         case XFER_READ:
6741         case XFER_READ | XFER_WRITE:
6742                 break;
6743         default:
6744                 return -EINVAL;
6745         }
6746
6747         if (iocommand.buf_size > 0) {
6748                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6749                 if (!kernel_buffer)
6750                         return -ENOMEM;
6751                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6752                         if (copy_from_user(kernel_buffer, iocommand.buf,
6753                                 iocommand.buf_size)) {
6754                                 rc = -EFAULT;
6755                                 goto out;
6756                         }
6757                 } else {
6758                         memset(kernel_buffer, 0, iocommand.buf_size);
6759                 }
6760         }
6761
6762         memset(&request, 0, sizeof(request));
6763
6764         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6765         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6766                 PQI_REQUEST_HEADER_LENGTH;
6767         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6768                 sizeof(request.lun_number));
6769         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6770         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6771
6772         switch (iocommand.Request.Type.Direction) {
6773         case XFER_NONE:
6774                 request.data_direction = SOP_NO_DIRECTION_FLAG;
6775                 break;
6776         case XFER_WRITE:
6777                 request.data_direction = SOP_WRITE_FLAG;
6778                 break;
6779         case XFER_READ:
6780                 request.data_direction = SOP_READ_FLAG;
6781                 break;
6782         case XFER_READ | XFER_WRITE:
6783                 request.data_direction = SOP_BIDIRECTIONAL;
6784                 break;
6785         }
6786
6787         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6788
6789         if (iocommand.buf_size > 0) {
6790                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6791
6792                 rc = pqi_map_single(ctrl_info->pci_dev,
6793                         &request.sg_descriptors[0], kernel_buffer,
6794                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6795                 if (rc)
6796                         goto out;
6797
6798                 iu_length += sizeof(request.sg_descriptors[0]);
6799         }
6800
6801         put_unaligned_le16(iu_length, &request.header.iu_length);
6802
6803         if (ctrl_info->raid_iu_timeout_supported)
6804                 put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6805
6806         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6807                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
6808
6809         if (iocommand.buf_size > 0)
6810                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6811                         DMA_BIDIRECTIONAL);
6812
6813         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6814
6815         if (rc == 0) {
6816                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6817                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6818                 iocommand.error_info.CommandStatus =
6819                         ciss_error_info.command_status;
6820                 sense_data_length = ciss_error_info.sense_data_length;
6821                 if (sense_data_length) {
6822                         if (sense_data_length >
6823                                 sizeof(iocommand.error_info.SenseInfo))
6824                                 sense_data_length =
6825                                         sizeof(iocommand.error_info.SenseInfo);
6826                         memcpy(iocommand.error_info.SenseInfo,
6827                                 pqi_error_info.data, sense_data_length);
6828                         iocommand.error_info.SenseLen = sense_data_length;
6829                 }
6830         }
6831
6832         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6833                 rc = -EFAULT;
6834                 goto out;
6835         }
6836
6837         if (rc == 0 && iocommand.buf_size > 0 &&
6838                 (iocommand.Request.Type.Direction & XFER_READ)) {
6839                 if (copy_to_user(iocommand.buf, kernel_buffer,
6840                         iocommand.buf_size)) {
6841                         rc = -EFAULT;
6842                 }
6843         }
6844
6845 out:
6846         kfree(kernel_buffer);
6847
6848         return rc;
6849 }
6850
6851 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6852                      void __user *arg)
6853 {
6854         int rc;
6855         struct pqi_ctrl_info *ctrl_info;
6856
6857         ctrl_info = shost_to_hba(sdev->host);
6858
6859         switch (cmd) {
6860         case CCISS_DEREGDISK:
6861         case CCISS_REGNEWDISK:
6862         case CCISS_REGNEWD:
6863                 rc = pqi_scan_scsi_devices(ctrl_info);
6864                 break;
6865         case CCISS_GETPCIINFO:
6866                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6867                 break;
6868         case CCISS_GETDRIVVER:
6869                 rc = pqi_getdrivver_ioctl(arg);
6870                 break;
6871         case CCISS_PASSTHRU:
6872                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6873                 break;
6874         default:
6875                 rc = -EINVAL;
6876                 break;
6877         }
6878
6879         return rc;
6880 }
6881
6882 static ssize_t pqi_firmware_version_show(struct device *dev,
6883         struct device_attribute *attr, char *buffer)
6884 {
6885         struct Scsi_Host *shost;
6886         struct pqi_ctrl_info *ctrl_info;
6887
6888         shost = class_to_shost(dev);
6889         ctrl_info = shost_to_hba(shost);
6890
6891         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6892 }
6893
6894 static ssize_t pqi_serial_number_show(struct device *dev,
6895         struct device_attribute *attr, char *buffer)
6896 {
6897         struct Scsi_Host *shost;
6898         struct pqi_ctrl_info *ctrl_info;
6899
6900         shost = class_to_shost(dev);
6901         ctrl_info = shost_to_hba(shost);
6902
6903         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6904 }
6905
6906 static ssize_t pqi_model_show(struct device *dev,
6907         struct device_attribute *attr, char *buffer)
6908 {
6909         struct Scsi_Host *shost;
6910         struct pqi_ctrl_info *ctrl_info;
6911
6912         shost = class_to_shost(dev);
6913         ctrl_info = shost_to_hba(shost);
6914
6915         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6916 }
6917
6918 static ssize_t pqi_vendor_show(struct device *dev,
6919         struct device_attribute *attr, char *buffer)
6920 {
6921         struct Scsi_Host *shost;
6922         struct pqi_ctrl_info *ctrl_info;
6923
6924         shost = class_to_shost(dev);
6925         ctrl_info = shost_to_hba(shost);
6926
6927         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6928 }
6929
6930 static ssize_t pqi_host_rescan_store(struct device *dev,
6931         struct device_attribute *attr, const char *buffer, size_t count)
6932 {
6933         struct Scsi_Host *shost = class_to_shost(dev);
6934
6935         pqi_scan_start(shost);
6936
6937         return count;
6938 }
6939
6940 static ssize_t pqi_lockup_action_show(struct device *dev,
6941         struct device_attribute *attr, char *buffer)
6942 {
6943         int count = 0;
6944         unsigned int i;
6945
6946         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6947                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6948                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6949                                 "[%s] ", pqi_lockup_actions[i].name);
6950                 else
6951                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6952                                 "%s ", pqi_lockup_actions[i].name);
6953         }
6954
6955         count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6956
6957         return count;
6958 }
6959
6960 static ssize_t pqi_lockup_action_store(struct device *dev,
6961         struct device_attribute *attr, const char *buffer, size_t count)
6962 {
6963         unsigned int i;
6964         char *action_name;
6965         char action_name_buffer[32];
6966
6967         strscpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6968         action_name = strstrip(action_name_buffer);
6969
6970         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6971                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6972                         pqi_lockup_action = pqi_lockup_actions[i].action;
6973                         return count;
6974                 }
6975         }
6976
6977         return -EINVAL;
6978 }
6979
6980 static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
6981         struct device_attribute *attr, char *buffer)
6982 {
6983         struct Scsi_Host *shost = class_to_shost(dev);
6984         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6985
6986         return scnprintf(buffer, 10, "%x\n",
6987                         ctrl_info->enable_stream_detection);
6988 }
6989
6990 static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
6991         struct device_attribute *attr, const char *buffer, size_t count)
6992 {
6993         struct Scsi_Host *shost = class_to_shost(dev);
6994         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6995         u8 set_stream_detection = 0;
6996
6997         if (kstrtou8(buffer, 0, &set_stream_detection))
6998                 return -EINVAL;
6999
7000         if (set_stream_detection > 0)
7001                 set_stream_detection = 1;
7002
7003         ctrl_info->enable_stream_detection = set_stream_detection;
7004
7005         return count;
7006 }
7007
7008 static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
7009         struct device_attribute *attr, char *buffer)
7010 {
7011         struct Scsi_Host *shost = class_to_shost(dev);
7012         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
7013
7014         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
7015 }
7016
7017 static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
7018         struct device_attribute *attr, const char *buffer, size_t count)
7019 {
7020         struct Scsi_Host *shost = class_to_shost(dev);
7021         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
7022         u8 set_r5_writes = 0;
7023
7024         if (kstrtou8(buffer, 0, &set_r5_writes))
7025                 return -EINVAL;
7026
7027         if (set_r5_writes > 0)
7028                 set_r5_writes = 1;
7029
7030         ctrl_info->enable_r5_writes = set_r5_writes;
7031
7032         return count;
7033 }
7034
7035 static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
7036         struct device_attribute *attr, char *buffer)
7037 {
7038         struct Scsi_Host *shost = class_to_shost(dev);
7039         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
7040
7041         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
7042 }
7043
7044 static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
7045         struct device_attribute *attr, const char *buffer, size_t count)
7046 {
7047         struct Scsi_Host *shost = class_to_shost(dev);
7048         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
7049         u8 set_r6_writes = 0;
7050
7051         if (kstrtou8(buffer, 0, &set_r6_writes))
7052                 return -EINVAL;
7053
7054         if (set_r6_writes > 0)
7055                 set_r6_writes = 1;
7056
7057         ctrl_info->enable_r6_writes = set_r6_writes;
7058
7059         return count;
7060 }
7061
7062 static DEVICE_STRING_ATTR_RO(driver_version, 0444,
7063         DRIVER_VERSION BUILD_TIMESTAMP);
7064 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
7065 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
7066 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
7067 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
7068 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
7069 static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
7070         pqi_lockup_action_store);
7071 static DEVICE_ATTR(enable_stream_detection, 0644,
7072         pqi_host_enable_stream_detection_show,
7073         pqi_host_enable_stream_detection_store);
7074 static DEVICE_ATTR(enable_r5_writes, 0644,
7075         pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
7076 static DEVICE_ATTR(enable_r6_writes, 0644,
7077         pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
7078
7079 static struct attribute *pqi_shost_attrs[] = {
7080         &dev_attr_driver_version.attr.attr,
7081         &dev_attr_firmware_version.attr,
7082         &dev_attr_model.attr,
7083         &dev_attr_serial_number.attr,
7084         &dev_attr_vendor.attr,
7085         &dev_attr_rescan.attr,
7086         &dev_attr_lockup_action.attr,
7087         &dev_attr_enable_stream_detection.attr,
7088         &dev_attr_enable_r5_writes.attr,
7089         &dev_attr_enable_r6_writes.attr,
7090         NULL
7091 };
7092
7093 ATTRIBUTE_GROUPS(pqi_shost);
7094
7095 static ssize_t pqi_unique_id_show(struct device *dev,
7096         struct device_attribute *attr, char *buffer)
7097 {
7098         struct pqi_ctrl_info *ctrl_info;
7099         struct scsi_device *sdev;
7100         struct pqi_scsi_dev *device;
7101         unsigned long flags;
7102         u8 unique_id[16];
7103
7104         sdev = to_scsi_device(dev);
7105         ctrl_info = shost_to_hba(sdev->host);
7106
7107         if (pqi_ctrl_offline(ctrl_info))
7108                 return -ENODEV;
7109
7110         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7111
7112         device = sdev->hostdata;
7113         if (!device) {
7114                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7115                 return -ENODEV;
7116         }
7117
7118         if (device->is_physical_device)
7119                 memcpy(unique_id, device->wwid, sizeof(device->wwid));
7120         else
7121                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
7122
7123         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7124
7125         return scnprintf(buffer, PAGE_SIZE,
7126                 "%02X%02X%02X%02X%02X%02X%02X%02X"
7127                 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
7128                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
7129                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
7130                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
7131                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
7132 }
7133
7134 static ssize_t pqi_lunid_show(struct device *dev,
7135         struct device_attribute *attr, char *buffer)
7136 {
7137         struct pqi_ctrl_info *ctrl_info;
7138         struct scsi_device *sdev;
7139         struct pqi_scsi_dev *device;
7140         unsigned long flags;
7141         u8 lunid[8];
7142
7143         sdev = to_scsi_device(dev);
7144         ctrl_info = shost_to_hba(sdev->host);
7145
7146         if (pqi_ctrl_offline(ctrl_info))
7147                 return -ENODEV;
7148
7149         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7150
7151         device = sdev->hostdata;
7152         if (!device) {
7153                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7154                 return -ENODEV;
7155         }
7156
7157         memcpy(lunid, device->scsi3addr, sizeof(lunid));
7158
7159         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7160
7161         return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
7162 }
7163
7164 #define MAX_PATHS       8
7165
7166 static ssize_t pqi_path_info_show(struct device *dev,
7167         struct device_attribute *attr, char *buf)
7168 {
7169         struct pqi_ctrl_info *ctrl_info;
7170         struct scsi_device *sdev;
7171         struct pqi_scsi_dev *device;
7172         unsigned long flags;
7173         int i;
7174         int output_len = 0;
7175         u8 box;
7176         u8 bay;
7177         u8 path_map_index;
7178         char *active;
7179         u8 phys_connector[2];
7180
7181         sdev = to_scsi_device(dev);
7182         ctrl_info = shost_to_hba(sdev->host);
7183
7184         if (pqi_ctrl_offline(ctrl_info))
7185                 return -ENODEV;
7186
7187         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7188
7189         device = sdev->hostdata;
7190         if (!device) {
7191                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7192                 return -ENODEV;
7193         }
7194
7195         bay = device->bay;
7196         for (i = 0; i < MAX_PATHS; i++) {
7197                 path_map_index = 1 << i;
7198                 if (i == device->active_path_index)
7199                         active = "Active";
7200                 else if (device->path_map & path_map_index)
7201                         active = "Inactive";
7202                 else
7203                         continue;
7204
7205                 output_len += scnprintf(buf + output_len,
7206                                         PAGE_SIZE - output_len,
7207                                         "[%d:%d:%d:%d] %20.20s ",
7208                                         ctrl_info->scsi_host->host_no,
7209                                         device->bus, device->target,
7210                                         device->lun,
7211                                         scsi_device_type(device->devtype));
7212
7213                 if (device->devtype == TYPE_RAID ||
7214                         pqi_is_logical_device(device))
7215                         goto end_buffer;
7216
7217                 memcpy(&phys_connector, &device->phys_connector[i],
7218                         sizeof(phys_connector));
7219                 if (phys_connector[0] < '0')
7220                         phys_connector[0] = '0';
7221                 if (phys_connector[1] < '0')
7222                         phys_connector[1] = '0';
7223
7224                 output_len += scnprintf(buf + output_len,
7225                                         PAGE_SIZE - output_len,
7226                                         "PORT: %.2s ", phys_connector);
7227
7228                 box = device->box[i];
7229                 if (box != 0 && box != 0xFF)
7230                         output_len += scnprintf(buf + output_len,
7231                                                 PAGE_SIZE - output_len,
7232                                                 "BOX: %hhu ", box);
7233
7234                 if ((device->devtype == TYPE_DISK ||
7235                         device->devtype == TYPE_ZBC) &&
7236                         pqi_expose_device(device))
7237                         output_len += scnprintf(buf + output_len,
7238                                                 PAGE_SIZE - output_len,
7239                                                 "BAY: %hhu ", bay);
7240
7241 end_buffer:
7242                 output_len += scnprintf(buf + output_len,
7243                                         PAGE_SIZE - output_len,
7244                                         "%s\n", active);
7245         }
7246
7247         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7248
7249         return output_len;
7250 }
7251
7252 static ssize_t pqi_sas_address_show(struct device *dev,
7253         struct device_attribute *attr, char *buffer)
7254 {
7255         struct pqi_ctrl_info *ctrl_info;
7256         struct scsi_device *sdev;
7257         struct pqi_scsi_dev *device;
7258         unsigned long flags;
7259         u64 sas_address;
7260
7261         sdev = to_scsi_device(dev);
7262         ctrl_info = shost_to_hba(sdev->host);
7263
7264         if (pqi_ctrl_offline(ctrl_info))
7265                 return -ENODEV;
7266
7267         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7268
7269         device = sdev->hostdata;
7270         if (!device) {
7271                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7272                 return -ENODEV;
7273         }
7274
7275         sas_address = device->sas_address;
7276
7277         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7278
7279         return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
7280 }
7281
7282 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
7283         struct device_attribute *attr, char *buffer)
7284 {
7285         struct pqi_ctrl_info *ctrl_info;
7286         struct scsi_device *sdev;
7287         struct pqi_scsi_dev *device;
7288         unsigned long flags;
7289
7290         sdev = to_scsi_device(dev);
7291         ctrl_info = shost_to_hba(sdev->host);
7292
7293         if (pqi_ctrl_offline(ctrl_info))
7294                 return -ENODEV;
7295
7296         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7297
7298         device = sdev->hostdata;
7299         if (!device) {
7300                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7301                 return -ENODEV;
7302         }
7303
7304         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
7305         buffer[1] = '\n';
7306         buffer[2] = '\0';
7307
7308         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7309
7310         return 2;
7311 }
7312
7313 static ssize_t pqi_raid_level_show(struct device *dev,
7314         struct device_attribute *attr, char *buffer)
7315 {
7316         struct pqi_ctrl_info *ctrl_info;
7317         struct scsi_device *sdev;
7318         struct pqi_scsi_dev *device;
7319         unsigned long flags;
7320         char *raid_level;
7321
7322         sdev = to_scsi_device(dev);
7323         ctrl_info = shost_to_hba(sdev->host);
7324
7325         if (pqi_ctrl_offline(ctrl_info))
7326                 return -ENODEV;
7327
7328         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7329
7330         device = sdev->hostdata;
7331         if (!device) {
7332                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7333                 return -ENODEV;
7334         }
7335
7336         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK)
7337                 raid_level = pqi_raid_level_to_string(device->raid_level);
7338         else
7339                 raid_level = "N/A";
7340
7341         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7342
7343         return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
7344 }
7345
7346 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
7347         struct device_attribute *attr, char *buffer)
7348 {
7349         struct pqi_ctrl_info *ctrl_info;
7350         struct scsi_device *sdev;
7351         struct pqi_scsi_dev *device;
7352         unsigned long flags;
7353         unsigned int raid_bypass_cnt;
7354
7355         sdev = to_scsi_device(dev);
7356         ctrl_info = shost_to_hba(sdev->host);
7357
7358         if (pqi_ctrl_offline(ctrl_info))
7359                 return -ENODEV;
7360
7361         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7362
7363         device = sdev->hostdata;
7364         if (!device) {
7365                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7366                 return -ENODEV;
7367         }
7368
7369         raid_bypass_cnt = device->raid_bypass_cnt;
7370
7371         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7372
7373         return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
7374 }
7375
7376 static ssize_t pqi_sas_ncq_prio_enable_show(struct device *dev,
7377                 struct device_attribute *attr, char *buf)
7378 {
7379         struct pqi_ctrl_info *ctrl_info;
7380         struct scsi_device *sdev;
7381         struct pqi_scsi_dev *device;
7382         unsigned long flags;
7383         int output_len = 0;
7384
7385         sdev = to_scsi_device(dev);
7386         ctrl_info = shost_to_hba(sdev->host);
7387
7388         if (pqi_ctrl_offline(ctrl_info))
7389                 return -ENODEV;
7390
7391         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7392
7393         device = sdev->hostdata;
7394         if (!device) {
7395                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7396                 return -ENODEV;
7397         }
7398
7399         output_len = snprintf(buf, PAGE_SIZE, "%d\n",
7400                                 device->ncq_prio_enable);
7401         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7402
7403         return output_len;
7404 }
7405
7406 static ssize_t pqi_sas_ncq_prio_enable_store(struct device *dev,
7407                         struct device_attribute *attr,
7408                         const char *buf, size_t count)
7409 {
7410         struct pqi_ctrl_info *ctrl_info;
7411         struct scsi_device *sdev;
7412         struct pqi_scsi_dev *device;
7413         unsigned long flags;
7414         u8 ncq_prio_enable = 0;
7415
7416         if (kstrtou8(buf, 0, &ncq_prio_enable))
7417                 return -EINVAL;
7418
7419         sdev = to_scsi_device(dev);
7420         ctrl_info = shost_to_hba(sdev->host);
7421
7422         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7423
7424         device = sdev->hostdata;
7425
7426         if (!device) {
7427                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7428                 return -ENODEV;
7429         }
7430
7431         if (!device->ncq_prio_support) {
7432                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7433                 return -EINVAL;
7434         }
7435
7436         device->ncq_prio_enable = ncq_prio_enable;
7437
7438         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7439
7440         return  strlen(buf);
7441 }
7442
7443 static ssize_t pqi_numa_node_show(struct device *dev,
7444         struct device_attribute *attr, char *buffer)
7445 {
7446         struct scsi_device *sdev;
7447         struct pqi_ctrl_info *ctrl_info;
7448
7449         sdev = to_scsi_device(dev);
7450         ctrl_info = shost_to_hba(sdev->host);
7451
7452         return scnprintf(buffer, PAGE_SIZE, "%d\n", ctrl_info->numa_node);
7453 }
7454
7455 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
7456 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
7457 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
7458 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
7459 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
7460 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
7461 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
7462 static DEVICE_ATTR(sas_ncq_prio_enable, 0644,
7463                 pqi_sas_ncq_prio_enable_show, pqi_sas_ncq_prio_enable_store);
7464 static DEVICE_ATTR(numa_node, 0444, pqi_numa_node_show, NULL);
7465
7466 static struct attribute *pqi_sdev_attrs[] = {
7467         &dev_attr_lunid.attr,
7468         &dev_attr_unique_id.attr,
7469         &dev_attr_path_info.attr,
7470         &dev_attr_sas_address.attr,
7471         &dev_attr_ssd_smart_path_enabled.attr,
7472         &dev_attr_raid_level.attr,
7473         &dev_attr_raid_bypass_cnt.attr,
7474         &dev_attr_sas_ncq_prio_enable.attr,
7475         &dev_attr_numa_node.attr,
7476         NULL
7477 };
7478
7479 ATTRIBUTE_GROUPS(pqi_sdev);
7480
7481 static const struct scsi_host_template pqi_driver_template = {
7482         .module = THIS_MODULE,
7483         .name = DRIVER_NAME_SHORT,
7484         .proc_name = DRIVER_NAME_SHORT,
7485         .queuecommand = pqi_scsi_queue_command,
7486         .scan_start = pqi_scan_start,
7487         .scan_finished = pqi_scan_finished,
7488         .this_id = -1,
7489         .eh_device_reset_handler = pqi_eh_device_reset_handler,
7490         .eh_abort_handler = pqi_eh_abort_handler,
7491         .ioctl = pqi_ioctl,
7492         .slave_alloc = pqi_slave_alloc,
7493         .slave_configure = pqi_slave_configure,
7494         .slave_destroy = pqi_slave_destroy,
7495         .map_queues = pqi_map_queues,
7496         .sdev_groups = pqi_sdev_groups,
7497         .shost_groups = pqi_shost_groups,
7498         .cmd_size = sizeof(struct pqi_cmd_priv),
7499 };
7500
7501 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
7502 {
7503         int rc;
7504         struct Scsi_Host *shost;
7505
7506         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
7507         if (!shost) {
7508                 dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
7509                 return -ENOMEM;
7510         }
7511
7512         shost->io_port = 0;
7513         shost->n_io_port = 0;
7514         shost->this_id = -1;
7515         shost->max_channel = PQI_MAX_BUS;
7516         shost->max_cmd_len = MAX_COMMAND_SIZE;
7517         shost->max_lun = PQI_MAX_LUNS_PER_DEVICE;
7518         shost->max_id = ~0;
7519         shost->max_sectors = ctrl_info->max_sectors;
7520         shost->can_queue = ctrl_info->scsi_ml_can_queue;
7521         shost->cmd_per_lun = shost->can_queue;
7522         shost->sg_tablesize = ctrl_info->sg_tablesize;
7523         shost->transportt = pqi_sas_transport_template;
7524         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
7525         shost->unique_id = shost->irq;
7526         shost->nr_hw_queues = ctrl_info->num_queue_groups;
7527         shost->host_tagset = 1;
7528         shost->hostdata[0] = (unsigned long)ctrl_info;
7529
7530         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
7531         if (rc) {
7532                 dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
7533                 goto free_host;
7534         }
7535
7536         rc = pqi_add_sas_host(shost, ctrl_info);
7537         if (rc) {
7538                 dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
7539                 goto remove_host;
7540         }
7541
7542         ctrl_info->scsi_host = shost;
7543
7544         return 0;
7545
7546 remove_host:
7547         scsi_remove_host(shost);
7548 free_host:
7549         scsi_host_put(shost);
7550
7551         return rc;
7552 }
7553
7554 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
7555 {
7556         struct Scsi_Host *shost;
7557
7558         pqi_delete_sas_host(ctrl_info);
7559
7560         shost = ctrl_info->scsi_host;
7561         if (!shost)
7562                 return;
7563
7564         scsi_remove_host(shost);
7565         scsi_host_put(shost);
7566 }
7567
7568 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
7569 {
7570         int rc = 0;
7571         struct pqi_device_registers __iomem *pqi_registers;
7572         unsigned long timeout;
7573         unsigned int timeout_msecs;
7574         union pqi_reset_register reset_reg;
7575
7576         pqi_registers = ctrl_info->pqi_registers;
7577         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
7578         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
7579
7580         while (1) {
7581                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
7582                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
7583                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
7584                         break;
7585                 if (!sis_is_firmware_running(ctrl_info)) {
7586                         rc = -ENXIO;
7587                         break;
7588                 }
7589                 if (time_after(jiffies, timeout)) {
7590                         rc = -ETIMEDOUT;
7591                         break;
7592                 }
7593         }
7594
7595         return rc;
7596 }
7597
7598 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
7599 {
7600         int rc;
7601         union pqi_reset_register reset_reg;
7602
7603         if (ctrl_info->pqi_reset_quiesce_supported) {
7604                 rc = sis_pqi_reset_quiesce(ctrl_info);
7605                 if (rc) {
7606                         dev_err(&ctrl_info->pci_dev->dev,
7607                                 "PQI reset failed during quiesce with error %d\n", rc);
7608                         return rc;
7609                 }
7610         }
7611
7612         reset_reg.all_bits = 0;
7613         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
7614         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
7615
7616         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
7617
7618         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
7619         if (rc)
7620                 dev_err(&ctrl_info->pci_dev->dev,
7621                         "PQI reset failed with error %d\n", rc);
7622
7623         return rc;
7624 }
7625
7626 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
7627 {
7628         int rc;
7629         struct bmic_sense_subsystem_info *sense_info;
7630
7631         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
7632         if (!sense_info)
7633                 return -ENOMEM;
7634
7635         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
7636         if (rc)
7637                 goto out;
7638
7639         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
7640                 sizeof(sense_info->ctrl_serial_number));
7641         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
7642
7643 out:
7644         kfree(sense_info);
7645
7646         return rc;
7647 }
7648
7649 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
7650 {
7651         int rc;
7652         struct bmic_identify_controller *identify;
7653
7654         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
7655         if (!identify)
7656                 return -ENOMEM;
7657
7658         rc = pqi_identify_controller(ctrl_info, identify);
7659         if (rc)
7660                 goto out;
7661
7662         if (get_unaligned_le32(&identify->extra_controller_flags) &
7663                 BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
7664                 memcpy(ctrl_info->firmware_version,
7665                         identify->firmware_version_long,
7666                         sizeof(identify->firmware_version_long));
7667         } else {
7668                 memcpy(ctrl_info->firmware_version,
7669                         identify->firmware_version_short,
7670                         sizeof(identify->firmware_version_short));
7671                 ctrl_info->firmware_version
7672                         [sizeof(identify->firmware_version_short)] = '\0';
7673                 snprintf(ctrl_info->firmware_version +
7674                         strlen(ctrl_info->firmware_version),
7675                         sizeof(ctrl_info->firmware_version) -
7676                         sizeof(identify->firmware_version_short),
7677                         "-%u",
7678                         get_unaligned_le16(&identify->firmware_build_number));
7679         }
7680
7681         memcpy(ctrl_info->model, identify->product_id,
7682                 sizeof(identify->product_id));
7683         ctrl_info->model[sizeof(identify->product_id)] = '\0';
7684
7685         memcpy(ctrl_info->vendor, identify->vendor_id,
7686                 sizeof(identify->vendor_id));
7687         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
7688
7689         dev_info(&ctrl_info->pci_dev->dev,
7690                 "Firmware version: %s\n", ctrl_info->firmware_version);
7691
7692 out:
7693         kfree(identify);
7694
7695         return rc;
7696 }
7697
7698 struct pqi_config_table_section_info {
7699         struct pqi_ctrl_info *ctrl_info;
7700         void            *section;
7701         u32             section_offset;
7702         void __iomem    *section_iomem_addr;
7703 };
7704
7705 static inline bool pqi_is_firmware_feature_supported(
7706         struct pqi_config_table_firmware_features *firmware_features,
7707         unsigned int bit_position)
7708 {
7709         unsigned int byte_index;
7710
7711         byte_index = bit_position / BITS_PER_BYTE;
7712
7713         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
7714                 return false;
7715
7716         return firmware_features->features_supported[byte_index] &
7717                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7718 }
7719
7720 static inline bool pqi_is_firmware_feature_enabled(
7721         struct pqi_config_table_firmware_features *firmware_features,
7722         void __iomem *firmware_features_iomem_addr,
7723         unsigned int bit_position)
7724 {
7725         unsigned int byte_index;
7726         u8 __iomem *features_enabled_iomem_addr;
7727
7728         byte_index = (bit_position / BITS_PER_BYTE) +
7729                 (le16_to_cpu(firmware_features->num_elements) * 2);
7730
7731         features_enabled_iomem_addr = firmware_features_iomem_addr +
7732                 offsetof(struct pqi_config_table_firmware_features,
7733                         features_supported) + byte_index;
7734
7735         return *((__force u8 *)features_enabled_iomem_addr) &
7736                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7737 }
7738
7739 static inline void pqi_request_firmware_feature(
7740         struct pqi_config_table_firmware_features *firmware_features,
7741         unsigned int bit_position)
7742 {
7743         unsigned int byte_index;
7744
7745         byte_index = (bit_position / BITS_PER_BYTE) +
7746                 le16_to_cpu(firmware_features->num_elements);
7747
7748         firmware_features->features_supported[byte_index] |=
7749                 (1 << (bit_position % BITS_PER_BYTE));
7750 }
7751
7752 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
7753         u16 first_section, u16 last_section)
7754 {
7755         struct pqi_vendor_general_request request;
7756
7757         memset(&request, 0, sizeof(request));
7758
7759         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7760         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7761                 &request.header.iu_length);
7762         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
7763                 &request.function_code);
7764         put_unaligned_le16(first_section,
7765                 &request.data.config_table_update.first_section);
7766         put_unaligned_le16(last_section,
7767                 &request.data.config_table_update.last_section);
7768
7769         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
7770 }
7771
7772 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
7773         struct pqi_config_table_firmware_features *firmware_features,
7774         void __iomem *firmware_features_iomem_addr)
7775 {
7776         void *features_requested;
7777         void __iomem *features_requested_iomem_addr;
7778         void __iomem *host_max_known_feature_iomem_addr;
7779
7780         features_requested = firmware_features->features_supported +
7781                 le16_to_cpu(firmware_features->num_elements);
7782
7783         features_requested_iomem_addr = firmware_features_iomem_addr +
7784                 (features_requested - (void *)firmware_features);
7785
7786         memcpy_toio(features_requested_iomem_addr, features_requested,
7787                 le16_to_cpu(firmware_features->num_elements));
7788
7789         if (pqi_is_firmware_feature_supported(firmware_features,
7790                 PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
7791                 host_max_known_feature_iomem_addr =
7792                         features_requested_iomem_addr +
7793                         (le16_to_cpu(firmware_features->num_elements) * 2) +
7794                         sizeof(__le16);
7795                 writeb(PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF, host_max_known_feature_iomem_addr);
7796                 writeb((PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF00) >> 8, host_max_known_feature_iomem_addr + 1);
7797         }
7798
7799         return pqi_config_table_update(ctrl_info,
7800                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
7801                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
7802 }
7803
7804 struct pqi_firmware_feature {
7805         char            *feature_name;
7806         unsigned int    feature_bit;
7807         bool            supported;
7808         bool            enabled;
7809         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
7810                 struct pqi_firmware_feature *firmware_feature);
7811 };
7812
7813 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
7814         struct pqi_firmware_feature *firmware_feature)
7815 {
7816         if (!firmware_feature->supported) {
7817                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
7818                         firmware_feature->feature_name);
7819                 return;
7820         }
7821
7822         if (firmware_feature->enabled) {
7823                 dev_info(&ctrl_info->pci_dev->dev,
7824                         "%s enabled\n", firmware_feature->feature_name);
7825                 return;
7826         }
7827
7828         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
7829                 firmware_feature->feature_name);
7830 }
7831
7832 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
7833         struct pqi_firmware_feature *firmware_feature)
7834 {
7835         switch (firmware_feature->feature_bit) {
7836         case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
7837                 ctrl_info->enable_r1_writes = firmware_feature->enabled;
7838                 break;
7839         case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
7840                 ctrl_info->enable_r5_writes = firmware_feature->enabled;
7841                 break;
7842         case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
7843                 ctrl_info->enable_r6_writes = firmware_feature->enabled;
7844                 break;
7845         case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
7846                 ctrl_info->soft_reset_handshake_supported =
7847                         firmware_feature->enabled &&
7848                         pqi_read_soft_reset_status(ctrl_info);
7849                 break;
7850         case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
7851                 ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
7852                 break;
7853         case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
7854                 ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
7855                 break;
7856         case PQI_FIRMWARE_FEATURE_FW_TRIAGE:
7857                 ctrl_info->firmware_triage_supported = firmware_feature->enabled;
7858                 pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
7859                 break;
7860         case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
7861                 ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
7862                 break;
7863         case PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT:
7864                 ctrl_info->multi_lun_device_supported = firmware_feature->enabled;
7865                 break;
7866         }
7867
7868         pqi_firmware_feature_status(ctrl_info, firmware_feature);
7869 }
7870
7871 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
7872         struct pqi_firmware_feature *firmware_feature)
7873 {
7874         if (firmware_feature->feature_status)
7875                 firmware_feature->feature_status(ctrl_info, firmware_feature);
7876 }
7877
7878 static DEFINE_MUTEX(pqi_firmware_features_mutex);
7879
7880 static struct pqi_firmware_feature pqi_firmware_features[] = {
7881         {
7882                 .feature_name = "Online Firmware Activation",
7883                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
7884                 .feature_status = pqi_firmware_feature_status,
7885         },
7886         {
7887                 .feature_name = "Serial Management Protocol",
7888                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
7889                 .feature_status = pqi_firmware_feature_status,
7890         },
7891         {
7892                 .feature_name = "Maximum Known Feature",
7893                 .feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
7894                 .feature_status = pqi_firmware_feature_status,
7895         },
7896         {
7897                 .feature_name = "RAID 0 Read Bypass",
7898                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
7899                 .feature_status = pqi_firmware_feature_status,
7900         },
7901         {
7902                 .feature_name = "RAID 1 Read Bypass",
7903                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
7904                 .feature_status = pqi_firmware_feature_status,
7905         },
7906         {
7907                 .feature_name = "RAID 5 Read Bypass",
7908                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
7909                 .feature_status = pqi_firmware_feature_status,
7910         },
7911         {
7912                 .feature_name = "RAID 6 Read Bypass",
7913                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
7914                 .feature_status = pqi_firmware_feature_status,
7915         },
7916         {
7917                 .feature_name = "RAID 0 Write Bypass",
7918                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
7919                 .feature_status = pqi_firmware_feature_status,
7920         },
7921         {
7922                 .feature_name = "RAID 1 Write Bypass",
7923                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
7924                 .feature_status = pqi_ctrl_update_feature_flags,
7925         },
7926         {
7927                 .feature_name = "RAID 5 Write Bypass",
7928                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
7929                 .feature_status = pqi_ctrl_update_feature_flags,
7930         },
7931         {
7932                 .feature_name = "RAID 6 Write Bypass",
7933                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
7934                 .feature_status = pqi_ctrl_update_feature_flags,
7935         },
7936         {
7937                 .feature_name = "New Soft Reset Handshake",
7938                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
7939                 .feature_status = pqi_ctrl_update_feature_flags,
7940         },
7941         {
7942                 .feature_name = "RAID IU Timeout",
7943                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
7944                 .feature_status = pqi_ctrl_update_feature_flags,
7945         },
7946         {
7947                 .feature_name = "TMF IU Timeout",
7948                 .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
7949                 .feature_status = pqi_ctrl_update_feature_flags,
7950         },
7951         {
7952                 .feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
7953                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
7954                 .feature_status = pqi_firmware_feature_status,
7955         },
7956         {
7957                 .feature_name = "Firmware Triage",
7958                 .feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
7959                 .feature_status = pqi_ctrl_update_feature_flags,
7960         },
7961         {
7962                 .feature_name = "RPL Extended Formats 4 and 5",
7963                 .feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
7964                 .feature_status = pqi_ctrl_update_feature_flags,
7965         },
7966         {
7967                 .feature_name = "Multi-LUN Target",
7968                 .feature_bit = PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT,
7969                 .feature_status = pqi_ctrl_update_feature_flags,
7970         },
7971 };
7972
7973 static void pqi_process_firmware_features(
7974         struct pqi_config_table_section_info *section_info)
7975 {
7976         int rc;
7977         struct pqi_ctrl_info *ctrl_info;
7978         struct pqi_config_table_firmware_features *firmware_features;
7979         void __iomem *firmware_features_iomem_addr;
7980         unsigned int i;
7981         unsigned int num_features_supported;
7982
7983         ctrl_info = section_info->ctrl_info;
7984         firmware_features = section_info->section;
7985         firmware_features_iomem_addr = section_info->section_iomem_addr;
7986
7987         for (i = 0, num_features_supported = 0;
7988                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
7989                 if (pqi_is_firmware_feature_supported(firmware_features,
7990                         pqi_firmware_features[i].feature_bit)) {
7991                         pqi_firmware_features[i].supported = true;
7992                         num_features_supported++;
7993                 } else {
7994                         pqi_firmware_feature_update(ctrl_info,
7995                                 &pqi_firmware_features[i]);
7996                 }
7997         }
7998
7999         if (num_features_supported == 0)
8000                 return;
8001
8002         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
8003                 if (!pqi_firmware_features[i].supported)
8004                         continue;
8005                 pqi_request_firmware_feature(firmware_features,
8006                         pqi_firmware_features[i].feature_bit);
8007         }
8008
8009         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
8010                 firmware_features_iomem_addr);
8011         if (rc) {
8012                 dev_err(&ctrl_info->pci_dev->dev,
8013                         "failed to enable firmware features in PQI configuration table\n");
8014                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
8015                         if (!pqi_firmware_features[i].supported)
8016                                 continue;
8017                         pqi_firmware_feature_update(ctrl_info,
8018                                 &pqi_firmware_features[i]);
8019                 }
8020                 return;
8021         }
8022
8023         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
8024                 if (!pqi_firmware_features[i].supported)
8025                         continue;
8026                 if (pqi_is_firmware_feature_enabled(firmware_features,
8027                         firmware_features_iomem_addr,
8028                         pqi_firmware_features[i].feature_bit)) {
8029                                 pqi_firmware_features[i].enabled = true;
8030                 }
8031                 pqi_firmware_feature_update(ctrl_info,
8032                         &pqi_firmware_features[i]);
8033         }
8034 }
8035
8036 static void pqi_init_firmware_features(void)
8037 {
8038         unsigned int i;
8039
8040         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
8041                 pqi_firmware_features[i].supported = false;
8042                 pqi_firmware_features[i].enabled = false;
8043         }
8044 }
8045
8046 static void pqi_process_firmware_features_section(
8047         struct pqi_config_table_section_info *section_info)
8048 {
8049         mutex_lock(&pqi_firmware_features_mutex);
8050         pqi_init_firmware_features();
8051         pqi_process_firmware_features(section_info);
8052         mutex_unlock(&pqi_firmware_features_mutex);
8053 }
8054
8055 /*
8056  * Reset all controller settings that can be initialized during the processing
8057  * of the PQI Configuration Table.
8058  */
8059
8060 static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
8061 {
8062         ctrl_info->heartbeat_counter = NULL;
8063         ctrl_info->soft_reset_status = NULL;
8064         ctrl_info->soft_reset_handshake_supported = false;
8065         ctrl_info->enable_r1_writes = false;
8066         ctrl_info->enable_r5_writes = false;
8067         ctrl_info->enable_r6_writes = false;
8068         ctrl_info->raid_iu_timeout_supported = false;
8069         ctrl_info->tmf_iu_timeout_supported = false;
8070         ctrl_info->firmware_triage_supported = false;
8071         ctrl_info->rpl_extended_format_4_5_supported = false;
8072         ctrl_info->multi_lun_device_supported = false;
8073 }
8074
8075 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
8076 {
8077         u32 table_length;
8078         u32 section_offset;
8079         bool firmware_feature_section_present;
8080         void __iomem *table_iomem_addr;
8081         struct pqi_config_table *config_table;
8082         struct pqi_config_table_section_header *section;
8083         struct pqi_config_table_section_info section_info;
8084         struct pqi_config_table_section_info feature_section_info = {0};
8085
8086         table_length = ctrl_info->config_table_length;
8087         if (table_length == 0)
8088                 return 0;
8089
8090         config_table = kmalloc(table_length, GFP_KERNEL);
8091         if (!config_table) {
8092                 dev_err(&ctrl_info->pci_dev->dev,
8093                         "failed to allocate memory for PQI configuration table\n");
8094                 return -ENOMEM;
8095         }
8096
8097         /*
8098          * Copy the config table contents from I/O memory space into the
8099          * temporary buffer.
8100          */
8101         table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
8102         memcpy_fromio(config_table, table_iomem_addr, table_length);
8103
8104         firmware_feature_section_present = false;
8105         section_info.ctrl_info = ctrl_info;
8106         section_offset = get_unaligned_le32(&config_table->first_section_offset);
8107
8108         while (section_offset) {
8109                 section = (void *)config_table + section_offset;
8110
8111                 section_info.section = section;
8112                 section_info.section_offset = section_offset;
8113                 section_info.section_iomem_addr = table_iomem_addr + section_offset;
8114
8115                 switch (get_unaligned_le16(&section->section_id)) {
8116                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
8117                         firmware_feature_section_present = true;
8118                         feature_section_info = section_info;
8119                         break;
8120                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
8121                         if (pqi_disable_heartbeat)
8122                                 dev_warn(&ctrl_info->pci_dev->dev,
8123                                 "heartbeat disabled by module parameter\n");
8124                         else
8125                                 ctrl_info->heartbeat_counter =
8126                                         table_iomem_addr +
8127                                         section_offset +
8128                                         offsetof(struct pqi_config_table_heartbeat,
8129                                                 heartbeat_counter);
8130                         break;
8131                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
8132                         ctrl_info->soft_reset_status =
8133                                 table_iomem_addr +
8134                                 section_offset +
8135                                 offsetof(struct pqi_config_table_soft_reset,
8136                                         soft_reset_status);
8137                         break;
8138                 }
8139
8140                 section_offset = get_unaligned_le16(&section->next_section_offset);
8141         }
8142
8143         /*
8144          * We process the firmware feature section after all other sections
8145          * have been processed so that the feature bit callbacks can take
8146          * into account the settings configured by other sections.
8147          */
8148         if (firmware_feature_section_present)
8149                 pqi_process_firmware_features_section(&feature_section_info);
8150
8151         kfree(config_table);
8152
8153         return 0;
8154 }
8155
8156 /* Switches the controller from PQI mode back into SIS mode. */
8157
8158 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
8159 {
8160         int rc;
8161
8162         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
8163         rc = pqi_reset(ctrl_info);
8164         if (rc)
8165                 return rc;
8166         rc = sis_reenable_sis_mode(ctrl_info);
8167         if (rc) {
8168                 dev_err(&ctrl_info->pci_dev->dev,
8169                         "re-enabling SIS mode failed with error %d\n", rc);
8170                 return rc;
8171         }
8172         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8173
8174         return 0;
8175 }
8176
8177 /*
8178  * If the controller isn't already in SIS mode, this function forces it into
8179  * SIS mode.
8180  */
8181
8182 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
8183 {
8184         if (!sis_is_firmware_running(ctrl_info))
8185                 return -ENXIO;
8186
8187         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
8188                 return 0;
8189
8190         if (sis_is_kernel_up(ctrl_info)) {
8191                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8192                 return 0;
8193         }
8194
8195         return pqi_revert_to_sis_mode(ctrl_info);
8196 }
8197
8198 static void pqi_perform_lockup_action(void)
8199 {
8200         switch (pqi_lockup_action) {
8201         case PANIC:
8202                 panic("FATAL: Smart Family Controller lockup detected");
8203                 break;
8204         case REBOOT:
8205                 emergency_restart();
8206                 break;
8207         case NONE:
8208         default:
8209                 break;
8210         }
8211 }
8212
8213 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
8214 {
8215         int rc;
8216         u32 product_id;
8217
8218         if (reset_devices) {
8219                 if (pqi_is_fw_triage_supported(ctrl_info)) {
8220                         rc = sis_wait_for_fw_triage_completion(ctrl_info);
8221                         if (rc)
8222                                 return rc;
8223                 }
8224                 sis_soft_reset(ctrl_info);
8225                 ssleep(PQI_POST_RESET_DELAY_SECS);
8226         } else {
8227                 rc = pqi_force_sis_mode(ctrl_info);
8228                 if (rc)
8229                         return rc;
8230         }
8231
8232         /*
8233          * Wait until the controller is ready to start accepting SIS
8234          * commands.
8235          */
8236         rc = sis_wait_for_ctrl_ready(ctrl_info);
8237         if (rc) {
8238                 if (reset_devices) {
8239                         dev_err(&ctrl_info->pci_dev->dev,
8240                                 "kdump init failed with error %d\n", rc);
8241                         pqi_lockup_action = REBOOT;
8242                         pqi_perform_lockup_action();
8243                 }
8244                 return rc;
8245         }
8246
8247         /*
8248          * Get the controller properties.  This allows us to determine
8249          * whether or not it supports PQI mode.
8250          */
8251         rc = sis_get_ctrl_properties(ctrl_info);
8252         if (rc) {
8253                 dev_err(&ctrl_info->pci_dev->dev,
8254                         "error obtaining controller properties\n");
8255                 return rc;
8256         }
8257
8258         rc = sis_get_pqi_capabilities(ctrl_info);
8259         if (rc) {
8260                 dev_err(&ctrl_info->pci_dev->dev,
8261                         "error obtaining controller capabilities\n");
8262                 return rc;
8263         }
8264
8265         product_id = sis_get_product_id(ctrl_info);
8266         ctrl_info->product_id = (u8)product_id;
8267         ctrl_info->product_revision = (u8)(product_id >> 8);
8268
8269         if (reset_devices) {
8270                 if (ctrl_info->max_outstanding_requests >
8271                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
8272                                 ctrl_info->max_outstanding_requests =
8273                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
8274         } else {
8275                 if (ctrl_info->max_outstanding_requests >
8276                         PQI_MAX_OUTSTANDING_REQUESTS)
8277                                 ctrl_info->max_outstanding_requests =
8278                                         PQI_MAX_OUTSTANDING_REQUESTS;
8279         }
8280
8281         pqi_calculate_io_resources(ctrl_info);
8282
8283         rc = pqi_alloc_error_buffer(ctrl_info);
8284         if (rc) {
8285                 dev_err(&ctrl_info->pci_dev->dev,
8286                         "failed to allocate PQI error buffer\n");
8287                 return rc;
8288         }
8289
8290         /*
8291          * If the function we are about to call succeeds, the
8292          * controller will transition from legacy SIS mode
8293          * into PQI mode.
8294          */
8295         rc = sis_init_base_struct_addr(ctrl_info);
8296         if (rc) {
8297                 dev_err(&ctrl_info->pci_dev->dev,
8298                         "error initializing PQI mode\n");
8299                 return rc;
8300         }
8301
8302         /* Wait for the controller to complete the SIS -> PQI transition. */
8303         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8304         if (rc) {
8305                 dev_err(&ctrl_info->pci_dev->dev,
8306                         "transition to PQI mode failed\n");
8307                 return rc;
8308         }
8309
8310         /* From here on, we are running in PQI mode. */
8311         ctrl_info->pqi_mode_enabled = true;
8312         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8313
8314         rc = pqi_alloc_admin_queues(ctrl_info);
8315         if (rc) {
8316                 dev_err(&ctrl_info->pci_dev->dev,
8317                         "failed to allocate admin queues\n");
8318                 return rc;
8319         }
8320
8321         rc = pqi_create_admin_queues(ctrl_info);
8322         if (rc) {
8323                 dev_err(&ctrl_info->pci_dev->dev,
8324                         "error creating admin queues\n");
8325                 return rc;
8326         }
8327
8328         rc = pqi_report_device_capability(ctrl_info);
8329         if (rc) {
8330                 dev_err(&ctrl_info->pci_dev->dev,
8331                         "obtaining device capability failed\n");
8332                 return rc;
8333         }
8334
8335         rc = pqi_validate_device_capability(ctrl_info);
8336         if (rc)
8337                 return rc;
8338
8339         pqi_calculate_queue_resources(ctrl_info);
8340
8341         rc = pqi_enable_msix_interrupts(ctrl_info);
8342         if (rc)
8343                 return rc;
8344
8345         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
8346                 ctrl_info->max_msix_vectors =
8347                         ctrl_info->num_msix_vectors_enabled;
8348                 pqi_calculate_queue_resources(ctrl_info);
8349         }
8350
8351         rc = pqi_alloc_io_resources(ctrl_info);
8352         if (rc)
8353                 return rc;
8354
8355         rc = pqi_alloc_operational_queues(ctrl_info);
8356         if (rc) {
8357                 dev_err(&ctrl_info->pci_dev->dev,
8358                         "failed to allocate operational queues\n");
8359                 return rc;
8360         }
8361
8362         pqi_init_operational_queues(ctrl_info);
8363
8364         rc = pqi_create_queues(ctrl_info);
8365         if (rc)
8366                 return rc;
8367
8368         rc = pqi_request_irqs(ctrl_info);
8369         if (rc)
8370                 return rc;
8371
8372         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8373
8374         ctrl_info->controller_online = true;
8375
8376         rc = pqi_process_config_table(ctrl_info);
8377         if (rc)
8378                 return rc;
8379
8380         pqi_start_heartbeat_timer(ctrl_info);
8381
8382         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8383                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8384                 if (rc) { /* Supported features not returned correctly. */
8385                         dev_err(&ctrl_info->pci_dev->dev,
8386                                 "error obtaining advanced RAID bypass configuration\n");
8387                         return rc;
8388                 }
8389                 ctrl_info->ciss_report_log_flags |=
8390                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8391         }
8392
8393         rc = pqi_enable_events(ctrl_info);
8394         if (rc) {
8395                 dev_err(&ctrl_info->pci_dev->dev,
8396                         "error enabling events\n");
8397                 return rc;
8398         }
8399
8400         /* Register with the SCSI subsystem. */
8401         rc = pqi_register_scsi(ctrl_info);
8402         if (rc)
8403                 return rc;
8404
8405         rc = pqi_get_ctrl_product_details(ctrl_info);
8406         if (rc) {
8407                 dev_err(&ctrl_info->pci_dev->dev,
8408                         "error obtaining product details\n");
8409                 return rc;
8410         }
8411
8412         rc = pqi_get_ctrl_serial_number(ctrl_info);
8413         if (rc) {
8414                 dev_err(&ctrl_info->pci_dev->dev,
8415                         "error obtaining ctrl serial number\n");
8416                 return rc;
8417         }
8418
8419         rc = pqi_set_diag_rescan(ctrl_info);
8420         if (rc) {
8421                 dev_err(&ctrl_info->pci_dev->dev,
8422                         "error enabling multi-lun rescan\n");
8423                 return rc;
8424         }
8425
8426         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8427         if (rc) {
8428                 dev_err(&ctrl_info->pci_dev->dev,
8429                         "error updating host wellness\n");
8430                 return rc;
8431         }
8432
8433         pqi_schedule_update_time_worker(ctrl_info);
8434
8435         pqi_scan_scsi_devices(ctrl_info);
8436
8437         return 0;
8438 }
8439
8440 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
8441 {
8442         unsigned int i;
8443         struct pqi_admin_queues *admin_queues;
8444         struct pqi_event_queue *event_queue;
8445
8446         admin_queues = &ctrl_info->admin_queues;
8447         admin_queues->iq_pi_copy = 0;
8448         admin_queues->oq_ci_copy = 0;
8449         writel(0, admin_queues->oq_pi);
8450
8451         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
8452                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
8453                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
8454                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
8455
8456                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
8457                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
8458                 writel(0, ctrl_info->queue_groups[i].oq_pi);
8459         }
8460
8461         event_queue = &ctrl_info->event_queue;
8462         writel(0, event_queue->oq_pi);
8463         event_queue->oq_ci_copy = 0;
8464 }
8465
8466 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
8467 {
8468         int rc;
8469
8470         rc = pqi_force_sis_mode(ctrl_info);
8471         if (rc)
8472                 return rc;
8473
8474         /*
8475          * Wait until the controller is ready to start accepting SIS
8476          * commands.
8477          */
8478         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
8479         if (rc)
8480                 return rc;
8481
8482         /*
8483          * Get the controller properties.  This allows us to determine
8484          * whether or not it supports PQI mode.
8485          */
8486         rc = sis_get_ctrl_properties(ctrl_info);
8487         if (rc) {
8488                 dev_err(&ctrl_info->pci_dev->dev,
8489                         "error obtaining controller properties\n");
8490                 return rc;
8491         }
8492
8493         rc = sis_get_pqi_capabilities(ctrl_info);
8494         if (rc) {
8495                 dev_err(&ctrl_info->pci_dev->dev,
8496                         "error obtaining controller capabilities\n");
8497                 return rc;
8498         }
8499
8500         /*
8501          * If the function we are about to call succeeds, the
8502          * controller will transition from legacy SIS mode
8503          * into PQI mode.
8504          */
8505         rc = sis_init_base_struct_addr(ctrl_info);
8506         if (rc) {
8507                 dev_err(&ctrl_info->pci_dev->dev,
8508                         "error initializing PQI mode\n");
8509                 return rc;
8510         }
8511
8512         /* Wait for the controller to complete the SIS -> PQI transition. */
8513         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8514         if (rc) {
8515                 dev_err(&ctrl_info->pci_dev->dev,
8516                         "transition to PQI mode failed\n");
8517                 return rc;
8518         }
8519
8520         /* From here on, we are running in PQI mode. */
8521         ctrl_info->pqi_mode_enabled = true;
8522         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8523
8524         pqi_reinit_queues(ctrl_info);
8525
8526         rc = pqi_create_admin_queues(ctrl_info);
8527         if (rc) {
8528                 dev_err(&ctrl_info->pci_dev->dev,
8529                         "error creating admin queues\n");
8530                 return rc;
8531         }
8532
8533         rc = pqi_create_queues(ctrl_info);
8534         if (rc)
8535                 return rc;
8536
8537         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8538
8539         ctrl_info->controller_online = true;
8540         pqi_ctrl_unblock_requests(ctrl_info);
8541
8542         pqi_ctrl_reset_config(ctrl_info);
8543
8544         rc = pqi_process_config_table(ctrl_info);
8545         if (rc)
8546                 return rc;
8547
8548         pqi_start_heartbeat_timer(ctrl_info);
8549
8550         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8551                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8552                 if (rc) {
8553                         dev_err(&ctrl_info->pci_dev->dev,
8554                                 "error obtaining advanced RAID bypass configuration\n");
8555                         return rc;
8556                 }
8557                 ctrl_info->ciss_report_log_flags |=
8558                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8559         }
8560
8561         rc = pqi_enable_events(ctrl_info);
8562         if (rc) {
8563                 dev_err(&ctrl_info->pci_dev->dev,
8564                         "error enabling events\n");
8565                 return rc;
8566         }
8567
8568         rc = pqi_get_ctrl_product_details(ctrl_info);
8569         if (rc) {
8570                 dev_err(&ctrl_info->pci_dev->dev,
8571                         "error obtaining product details\n");
8572                 return rc;
8573         }
8574
8575         rc = pqi_set_diag_rescan(ctrl_info);
8576         if (rc) {
8577                 dev_err(&ctrl_info->pci_dev->dev,
8578                         "error enabling multi-lun rescan\n");
8579                 return rc;
8580         }
8581
8582         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8583         if (rc) {
8584                 dev_err(&ctrl_info->pci_dev->dev,
8585                         "error updating host wellness\n");
8586                 return rc;
8587         }
8588
8589         if (pqi_ofa_in_progress(ctrl_info))
8590                 pqi_ctrl_unblock_scan(ctrl_info);
8591
8592         pqi_scan_scsi_devices(ctrl_info);
8593
8594         return 0;
8595 }
8596
8597 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
8598 {
8599         int rc;
8600
8601         rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
8602                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
8603
8604         return pcibios_err_to_errno(rc);
8605 }
8606
8607 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
8608 {
8609         int rc;
8610         u64 mask;
8611
8612         rc = pci_enable_device(ctrl_info->pci_dev);
8613         if (rc) {
8614                 dev_err(&ctrl_info->pci_dev->dev,
8615                         "failed to enable PCI device\n");
8616                 return rc;
8617         }
8618
8619         if (sizeof(dma_addr_t) > 4)
8620                 mask = DMA_BIT_MASK(64);
8621         else
8622                 mask = DMA_BIT_MASK(32);
8623
8624         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
8625         if (rc) {
8626                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
8627                 goto disable_device;
8628         }
8629
8630         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
8631         if (rc) {
8632                 dev_err(&ctrl_info->pci_dev->dev,
8633                         "failed to obtain PCI resources\n");
8634                 goto disable_device;
8635         }
8636
8637         ctrl_info->iomem_base = ioremap(pci_resource_start(
8638                 ctrl_info->pci_dev, 0),
8639                 pci_resource_len(ctrl_info->pci_dev, 0));
8640         if (!ctrl_info->iomem_base) {
8641                 dev_err(&ctrl_info->pci_dev->dev,
8642                         "failed to map memory for controller registers\n");
8643                 rc = -ENOMEM;
8644                 goto release_regions;
8645         }
8646
8647 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
8648
8649         /* Increase the PCIe completion timeout. */
8650         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
8651                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
8652         if (rc) {
8653                 dev_err(&ctrl_info->pci_dev->dev,
8654                         "failed to set PCIe completion timeout\n");
8655                 goto release_regions;
8656         }
8657
8658         /* Enable bus mastering. */
8659         pci_set_master(ctrl_info->pci_dev);
8660
8661         ctrl_info->registers = ctrl_info->iomem_base;
8662         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
8663
8664         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
8665
8666         return 0;
8667
8668 release_regions:
8669         pci_release_regions(ctrl_info->pci_dev);
8670 disable_device:
8671         pci_disable_device(ctrl_info->pci_dev);
8672
8673         return rc;
8674 }
8675
8676 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
8677 {
8678         iounmap(ctrl_info->iomem_base);
8679         pci_release_regions(ctrl_info->pci_dev);
8680         if (pci_is_enabled(ctrl_info->pci_dev))
8681                 pci_disable_device(ctrl_info->pci_dev);
8682         pci_set_drvdata(ctrl_info->pci_dev, NULL);
8683 }
8684
8685 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
8686 {
8687         struct pqi_ctrl_info *ctrl_info;
8688
8689         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
8690                         GFP_KERNEL, numa_node);
8691         if (!ctrl_info)
8692                 return NULL;
8693
8694         mutex_init(&ctrl_info->scan_mutex);
8695         mutex_init(&ctrl_info->lun_reset_mutex);
8696         mutex_init(&ctrl_info->ofa_mutex);
8697
8698         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
8699         spin_lock_init(&ctrl_info->scsi_device_list_lock);
8700
8701         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
8702         atomic_set(&ctrl_info->num_interrupts, 0);
8703
8704         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
8705         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
8706
8707         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
8708         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
8709
8710         INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
8711         INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
8712
8713         sema_init(&ctrl_info->sync_request_sem,
8714                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
8715         init_waitqueue_head(&ctrl_info->block_requests_wait);
8716
8717         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
8718         ctrl_info->irq_mode = IRQ_MODE_NONE;
8719         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
8720
8721         ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
8722         ctrl_info->max_transfer_encrypted_sas_sata =
8723                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
8724         ctrl_info->max_transfer_encrypted_nvme =
8725                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
8726         ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
8727         ctrl_info->max_write_raid_1_10_2drive = ~0;
8728         ctrl_info->max_write_raid_1_10_3drive = ~0;
8729         ctrl_info->disable_managed_interrupts = pqi_disable_managed_interrupts;
8730
8731         return ctrl_info;
8732 }
8733
8734 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
8735 {
8736         kfree(ctrl_info);
8737 }
8738
8739 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
8740 {
8741         pqi_free_irqs(ctrl_info);
8742         pqi_disable_msix_interrupts(ctrl_info);
8743 }
8744
8745 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
8746 {
8747         pqi_free_interrupts(ctrl_info);
8748         if (ctrl_info->queue_memory_base)
8749                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8750                         ctrl_info->queue_memory_length,
8751                         ctrl_info->queue_memory_base,
8752                         ctrl_info->queue_memory_base_dma_handle);
8753         if (ctrl_info->admin_queue_memory_base)
8754                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8755                         ctrl_info->admin_queue_memory_length,
8756                         ctrl_info->admin_queue_memory_base,
8757                         ctrl_info->admin_queue_memory_base_dma_handle);
8758         pqi_free_all_io_requests(ctrl_info);
8759         if (ctrl_info->error_buffer)
8760                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8761                         ctrl_info->error_buffer_length,
8762                         ctrl_info->error_buffer,
8763                         ctrl_info->error_buffer_dma_handle);
8764         if (ctrl_info->iomem_base)
8765                 pqi_cleanup_pci_init(ctrl_info);
8766         pqi_free_ctrl_info(ctrl_info);
8767 }
8768
8769 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
8770 {
8771         ctrl_info->controller_online = false;
8772         pqi_stop_heartbeat_timer(ctrl_info);
8773         pqi_ctrl_block_requests(ctrl_info);
8774         pqi_cancel_rescan_worker(ctrl_info);
8775         pqi_cancel_update_time_worker(ctrl_info);
8776         if (ctrl_info->ctrl_removal_state == PQI_CTRL_SURPRISE_REMOVAL) {
8777                 pqi_fail_all_outstanding_requests(ctrl_info);
8778                 ctrl_info->pqi_mode_enabled = false;
8779         }
8780         pqi_unregister_scsi(ctrl_info);
8781         if (ctrl_info->pqi_mode_enabled)
8782                 pqi_revert_to_sis_mode(ctrl_info);
8783         pqi_free_ctrl_resources(ctrl_info);
8784 }
8785
8786 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
8787 {
8788         pqi_ctrl_block_scan(ctrl_info);
8789         pqi_scsi_block_requests(ctrl_info);
8790         pqi_ctrl_block_device_reset(ctrl_info);
8791         pqi_ctrl_block_requests(ctrl_info);
8792         pqi_ctrl_wait_until_quiesced(ctrl_info);
8793         pqi_stop_heartbeat_timer(ctrl_info);
8794 }
8795
8796 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
8797 {
8798         pqi_start_heartbeat_timer(ctrl_info);
8799         pqi_ctrl_unblock_requests(ctrl_info);
8800         pqi_ctrl_unblock_device_reset(ctrl_info);
8801         pqi_scsi_unblock_requests(ctrl_info);
8802         pqi_ctrl_unblock_scan(ctrl_info);
8803 }
8804
8805 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
8806 {
8807         int i;
8808         u32 sg_count;
8809         struct device *dev;
8810         struct pqi_ofa_memory *ofap;
8811         struct pqi_sg_descriptor *mem_descriptor;
8812         dma_addr_t dma_handle;
8813
8814         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8815
8816         sg_count = DIV_ROUND_UP(total_size, chunk_size);
8817         if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
8818                 goto out;
8819
8820         ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
8821         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
8822                 goto out;
8823
8824         dev = &ctrl_info->pci_dev->dev;
8825
8826         for (i = 0; i < sg_count; i++) {
8827                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
8828                         dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
8829                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
8830                         goto out_free_chunks;
8831                 mem_descriptor = &ofap->sg_descriptor[i];
8832                 put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
8833                 put_unaligned_le32(chunk_size, &mem_descriptor->length);
8834         }
8835
8836         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
8837         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
8838         put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
8839
8840         return 0;
8841
8842 out_free_chunks:
8843         while (--i >= 0) {
8844                 mem_descriptor = &ofap->sg_descriptor[i];
8845                 dma_free_coherent(dev, chunk_size,
8846                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8847                         get_unaligned_le64(&mem_descriptor->address));
8848         }
8849         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8850
8851 out:
8852         return -ENOMEM;
8853 }
8854
8855 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
8856 {
8857         u32 total_size;
8858         u32 chunk_size;
8859         u32 min_chunk_size;
8860
8861         if (ctrl_info->ofa_bytes_requested == 0)
8862                 return 0;
8863
8864         total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
8865         min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
8866         min_chunk_size = PAGE_ALIGN(min_chunk_size);
8867
8868         for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
8869                 if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
8870                         return 0;
8871                 chunk_size /= 2;
8872                 chunk_size = PAGE_ALIGN(chunk_size);
8873         }
8874
8875         return -ENOMEM;
8876 }
8877
8878 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
8879 {
8880         struct device *dev;
8881         struct pqi_ofa_memory *ofap;
8882
8883         dev = &ctrl_info->pci_dev->dev;
8884
8885         ofap = dma_alloc_coherent(dev, sizeof(*ofap),
8886                 &ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
8887         if (!ofap)
8888                 return;
8889
8890         ctrl_info->pqi_ofa_mem_virt_addr = ofap;
8891
8892         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
8893                 dev_err(dev,
8894                         "failed to allocate host buffer for Online Firmware Activation\n");
8895                 dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
8896                 ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8897                 return;
8898         }
8899
8900         put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
8901         memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
8902 }
8903
8904 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
8905 {
8906         unsigned int i;
8907         struct device *dev;
8908         struct pqi_ofa_memory *ofap;
8909         struct pqi_sg_descriptor *mem_descriptor;
8910         unsigned int num_memory_descriptors;
8911
8912         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8913         if (!ofap)
8914                 return;
8915
8916         dev = &ctrl_info->pci_dev->dev;
8917
8918         if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
8919                 goto out;
8920
8921         mem_descriptor = ofap->sg_descriptor;
8922         num_memory_descriptors =
8923                 get_unaligned_le16(&ofap->num_memory_descriptors);
8924
8925         for (i = 0; i < num_memory_descriptors; i++) {
8926                 dma_free_coherent(dev,
8927                         get_unaligned_le32(&mem_descriptor[i].length),
8928                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8929                         get_unaligned_le64(&mem_descriptor[i].address));
8930         }
8931         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8932
8933 out:
8934         dma_free_coherent(dev, sizeof(*ofap), ofap,
8935                 ctrl_info->pqi_ofa_mem_dma_handle);
8936         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8937 }
8938
8939 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
8940 {
8941         u32 buffer_length;
8942         struct pqi_vendor_general_request request;
8943         struct pqi_ofa_memory *ofap;
8944
8945         memset(&request, 0, sizeof(request));
8946
8947         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
8948         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
8949                 &request.header.iu_length);
8950         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
8951                 &request.function_code);
8952
8953         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8954
8955         if (ofap) {
8956                 buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
8957                         get_unaligned_le16(&ofap->num_memory_descriptors) *
8958                         sizeof(struct pqi_sg_descriptor);
8959
8960                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
8961                         &request.data.ofa_memory_allocation.buffer_address);
8962                 put_unaligned_le32(buffer_length,
8963                         &request.data.ofa_memory_allocation.buffer_length);
8964         }
8965
8966         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
8967 }
8968
8969 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
8970 {
8971         ssleep(delay_secs);
8972
8973         return pqi_ctrl_init_resume(ctrl_info);
8974 }
8975
8976 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
8977         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
8978         .status = SAM_STAT_CHECK_CONDITION,
8979 };
8980
8981 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
8982 {
8983         unsigned int i;
8984         struct pqi_io_request *io_request;
8985         struct scsi_cmnd *scmd;
8986         struct scsi_device *sdev;
8987
8988         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8989                 io_request = &ctrl_info->io_request_pool[i];
8990                 if (atomic_read(&io_request->refcount) == 0)
8991                         continue;
8992
8993                 scmd = io_request->scmd;
8994                 if (scmd) {
8995                         sdev = scmd->device;
8996                         if (!sdev || !scsi_device_online(sdev)) {
8997                                 pqi_free_io_request(io_request);
8998                                 continue;
8999                         } else {
9000                                 set_host_byte(scmd, DID_NO_CONNECT);
9001                         }
9002                 } else {
9003                         io_request->status = -ENXIO;
9004                         io_request->error_info =
9005                                 &pqi_ctrl_offline_raid_error_info;
9006                 }
9007
9008                 io_request->io_complete_callback(io_request,
9009                         io_request->context);
9010         }
9011 }
9012
9013 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
9014 {
9015         pqi_perform_lockup_action();
9016         pqi_stop_heartbeat_timer(ctrl_info);
9017         pqi_free_interrupts(ctrl_info);
9018         pqi_cancel_rescan_worker(ctrl_info);
9019         pqi_cancel_update_time_worker(ctrl_info);
9020         pqi_ctrl_wait_until_quiesced(ctrl_info);
9021         pqi_fail_all_outstanding_requests(ctrl_info);
9022         pqi_ctrl_unblock_requests(ctrl_info);
9023 }
9024
9025 static void pqi_ctrl_offline_worker(struct work_struct *work)
9026 {
9027         struct pqi_ctrl_info *ctrl_info;
9028
9029         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
9030         pqi_take_ctrl_offline_deferred(ctrl_info);
9031 }
9032
9033 static char *pqi_ctrl_shutdown_reason_to_string(enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
9034 {
9035         char *string;
9036
9037         switch (ctrl_shutdown_reason) {
9038         case PQI_IQ_NOT_DRAINED_TIMEOUT:
9039                 string = "inbound queue not drained timeout";
9040                 break;
9041         case PQI_LUN_RESET_TIMEOUT:
9042                 string = "LUN reset timeout";
9043                 break;
9044         case PQI_IO_PENDING_POST_LUN_RESET_TIMEOUT:
9045                 string = "I/O pending timeout after LUN reset";
9046                 break;
9047         case PQI_NO_HEARTBEAT:
9048                 string = "no controller heartbeat detected";
9049                 break;
9050         case PQI_FIRMWARE_KERNEL_NOT_UP:
9051                 string = "firmware kernel not ready";
9052                 break;
9053         case PQI_OFA_RESPONSE_TIMEOUT:
9054                 string = "OFA response timeout";
9055                 break;
9056         case PQI_INVALID_REQ_ID:
9057                 string = "invalid request ID";
9058                 break;
9059         case PQI_UNMATCHED_REQ_ID:
9060                 string = "unmatched request ID";
9061                 break;
9062         case PQI_IO_PI_OUT_OF_RANGE:
9063                 string = "I/O queue producer index out of range";
9064                 break;
9065         case PQI_EVENT_PI_OUT_OF_RANGE:
9066                 string = "event queue producer index out of range";
9067                 break;
9068         case PQI_UNEXPECTED_IU_TYPE:
9069                 string = "unexpected IU type";
9070                 break;
9071         default:
9072                 string = "unknown reason";
9073                 break;
9074         }
9075
9076         return string;
9077 }
9078
9079 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
9080         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
9081 {
9082         if (!ctrl_info->controller_online)
9083                 return;
9084
9085         ctrl_info->controller_online = false;
9086         ctrl_info->pqi_mode_enabled = false;
9087         pqi_ctrl_block_requests(ctrl_info);
9088         if (!pqi_disable_ctrl_shutdown)
9089                 sis_shutdown_ctrl(ctrl_info, ctrl_shutdown_reason);
9090         pci_disable_device(ctrl_info->pci_dev);
9091         dev_err(&ctrl_info->pci_dev->dev,
9092                 "controller offline: reason code 0x%x (%s)\n",
9093                 ctrl_shutdown_reason, pqi_ctrl_shutdown_reason_to_string(ctrl_shutdown_reason));
9094         schedule_work(&ctrl_info->ctrl_offline_work);
9095 }
9096
9097 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
9098         const struct pci_device_id *id)
9099 {
9100         char *ctrl_description;
9101
9102         if (id->driver_data)
9103                 ctrl_description = (char *)id->driver_data;
9104         else
9105                 ctrl_description = "Microchip Smart Family Controller";
9106
9107         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
9108 }
9109
9110 static int pqi_pci_probe(struct pci_dev *pci_dev,
9111         const struct pci_device_id *id)
9112 {
9113         int rc;
9114         int node;
9115         struct pqi_ctrl_info *ctrl_info;
9116
9117         pqi_print_ctrl_info(pci_dev, id);
9118
9119         if (pqi_disable_device_id_wildcards &&
9120                 id->subvendor == PCI_ANY_ID &&
9121                 id->subdevice == PCI_ANY_ID) {
9122                 dev_warn(&pci_dev->dev,
9123                         "controller not probed because device ID wildcards are disabled\n");
9124                 return -ENODEV;
9125         }
9126
9127         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
9128                 dev_warn(&pci_dev->dev,
9129                         "controller device ID matched using wildcards\n");
9130
9131         node = dev_to_node(&pci_dev->dev);
9132         if (node == NUMA_NO_NODE) {
9133                 node = cpu_to_node(0);
9134                 if (node == NUMA_NO_NODE)
9135                         node = 0;
9136                 set_dev_node(&pci_dev->dev, node);
9137         }
9138
9139         ctrl_info = pqi_alloc_ctrl_info(node);
9140         if (!ctrl_info) {
9141                 dev_err(&pci_dev->dev,
9142                         "failed to allocate controller info block\n");
9143                 return -ENOMEM;
9144         }
9145         ctrl_info->numa_node = node;
9146
9147         ctrl_info->pci_dev = pci_dev;
9148
9149         rc = pqi_pci_init(ctrl_info);
9150         if (rc)
9151                 goto error;
9152
9153         rc = pqi_ctrl_init(ctrl_info);
9154         if (rc)
9155                 goto error;
9156
9157         return 0;
9158
9159 error:
9160         pqi_remove_ctrl(ctrl_info);
9161
9162         return rc;
9163 }
9164
9165 static void pqi_pci_remove(struct pci_dev *pci_dev)
9166 {
9167         struct pqi_ctrl_info *ctrl_info;
9168         u16 vendor_id;
9169         int rc;
9170
9171         ctrl_info = pci_get_drvdata(pci_dev);
9172         if (!ctrl_info)
9173                 return;
9174
9175         pci_read_config_word(ctrl_info->pci_dev, PCI_SUBSYSTEM_VENDOR_ID, &vendor_id);
9176         if (vendor_id == 0xffff)
9177                 ctrl_info->ctrl_removal_state = PQI_CTRL_SURPRISE_REMOVAL;
9178         else
9179                 ctrl_info->ctrl_removal_state = PQI_CTRL_GRACEFUL_REMOVAL;
9180
9181         if (ctrl_info->ctrl_removal_state == PQI_CTRL_GRACEFUL_REMOVAL) {
9182                 rc = pqi_flush_cache(ctrl_info, RESTART);
9183                 if (rc)
9184                         dev_err(&pci_dev->dev,
9185                                 "unable to flush controller cache during remove\n");
9186         }
9187
9188         pqi_remove_ctrl(ctrl_info);
9189 }
9190
9191 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
9192 {
9193         unsigned int i;
9194         struct pqi_io_request *io_request;
9195         struct scsi_cmnd *scmd;
9196
9197         for (i = 0; i < ctrl_info->max_io_slots; i++) {
9198                 io_request = &ctrl_info->io_request_pool[i];
9199                 if (atomic_read(&io_request->refcount) == 0)
9200                         continue;
9201                 scmd = io_request->scmd;
9202                 WARN_ON(scmd != NULL); /* IO command from SML */
9203                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
9204         }
9205 }
9206
9207 static void pqi_shutdown(struct pci_dev *pci_dev)
9208 {
9209         int rc;
9210         struct pqi_ctrl_info *ctrl_info;
9211         enum bmic_flush_cache_shutdown_event shutdown_event;
9212
9213         ctrl_info = pci_get_drvdata(pci_dev);
9214         if (!ctrl_info) {
9215                 dev_err(&pci_dev->dev,
9216                         "cache could not be flushed\n");
9217                 return;
9218         }
9219
9220         pqi_wait_until_ofa_finished(ctrl_info);
9221
9222         pqi_scsi_block_requests(ctrl_info);
9223         pqi_ctrl_block_device_reset(ctrl_info);
9224         pqi_ctrl_block_requests(ctrl_info);
9225         pqi_ctrl_wait_until_quiesced(ctrl_info);
9226
9227         if (system_state == SYSTEM_RESTART)
9228                 shutdown_event = RESTART;
9229         else
9230                 shutdown_event = SHUTDOWN;
9231
9232         /*
9233          * Write all data in the controller's battery-backed cache to
9234          * storage.
9235          */
9236         rc = pqi_flush_cache(ctrl_info, shutdown_event);
9237         if (rc)
9238                 dev_err(&pci_dev->dev,
9239                         "unable to flush controller cache during shutdown\n");
9240
9241         pqi_crash_if_pending_command(ctrl_info);
9242         pqi_reset(ctrl_info);
9243 }
9244
9245 static void pqi_process_lockup_action_param(void)
9246 {
9247         unsigned int i;
9248
9249         if (!pqi_lockup_action_param)
9250                 return;
9251
9252         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
9253                 if (strcmp(pqi_lockup_action_param,
9254                         pqi_lockup_actions[i].name) == 0) {
9255                         pqi_lockup_action = pqi_lockup_actions[i].action;
9256                         return;
9257                 }
9258         }
9259
9260         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
9261                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
9262 }
9263
9264 #define PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS           30
9265 #define PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS           (30 * 60)
9266
9267 static void pqi_process_ctrl_ready_timeout_param(void)
9268 {
9269         if (pqi_ctrl_ready_timeout_secs == 0)
9270                 return;
9271
9272         if (pqi_ctrl_ready_timeout_secs < PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS) {
9273                 pr_warn("%s: ctrl_ready_timeout parm of %u second(s) is less than minimum timeout of %d seconds - setting timeout to %d seconds\n",
9274                         DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS);
9275                 pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS;
9276         } else if (pqi_ctrl_ready_timeout_secs > PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS) {
9277                 pr_warn("%s: ctrl_ready_timeout parm of %u seconds is greater than maximum timeout of %d seconds - setting timeout to %d seconds\n",
9278                         DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS);
9279                 pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS;
9280         }
9281
9282         sis_ctrl_ready_timeout_secs = pqi_ctrl_ready_timeout_secs;
9283 }
9284
9285 static void pqi_process_module_params(void)
9286 {
9287         pqi_process_lockup_action_param();
9288         pqi_process_ctrl_ready_timeout_param();
9289 }
9290
9291 #if defined(CONFIG_PM)
9292
9293 static inline enum bmic_flush_cache_shutdown_event pqi_get_flush_cache_shutdown_event(struct pci_dev *pci_dev)
9294 {
9295         if (pci_dev->subsystem_vendor == PCI_VENDOR_ID_ADAPTEC2 && pci_dev->subsystem_device == 0x1304)
9296                 return RESTART;
9297
9298         return SUSPEND;
9299 }
9300
9301 static int pqi_suspend_or_freeze(struct device *dev, bool suspend)
9302 {
9303         struct pci_dev *pci_dev;
9304         struct pqi_ctrl_info *ctrl_info;
9305
9306         pci_dev = to_pci_dev(dev);
9307         ctrl_info = pci_get_drvdata(pci_dev);
9308
9309         pqi_wait_until_ofa_finished(ctrl_info);
9310
9311         pqi_ctrl_block_scan(ctrl_info);
9312         pqi_scsi_block_requests(ctrl_info);
9313         pqi_ctrl_block_device_reset(ctrl_info);
9314         pqi_ctrl_block_requests(ctrl_info);
9315         pqi_ctrl_wait_until_quiesced(ctrl_info);
9316
9317         if (suspend) {
9318                 enum bmic_flush_cache_shutdown_event shutdown_event;
9319
9320                 shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9321                 pqi_flush_cache(ctrl_info, shutdown_event);
9322         }
9323
9324         pqi_stop_heartbeat_timer(ctrl_info);
9325         pqi_crash_if_pending_command(ctrl_info);
9326         pqi_free_irqs(ctrl_info);
9327
9328         ctrl_info->controller_online = false;
9329         ctrl_info->pqi_mode_enabled = false;
9330
9331         return 0;
9332 }
9333
9334 static __maybe_unused int pqi_suspend(struct device *dev)
9335 {
9336         return pqi_suspend_or_freeze(dev, true);
9337 }
9338
9339 static int pqi_resume_or_restore(struct device *dev)
9340 {
9341         int rc;
9342         struct pci_dev *pci_dev;
9343         struct pqi_ctrl_info *ctrl_info;
9344
9345         pci_dev = to_pci_dev(dev);
9346         ctrl_info = pci_get_drvdata(pci_dev);
9347
9348         rc = pqi_request_irqs(ctrl_info);
9349         if (rc)
9350                 return rc;
9351
9352         pqi_ctrl_unblock_device_reset(ctrl_info);
9353         pqi_ctrl_unblock_requests(ctrl_info);
9354         pqi_scsi_unblock_requests(ctrl_info);
9355         pqi_ctrl_unblock_scan(ctrl_info);
9356
9357         ssleep(PQI_POST_RESET_DELAY_SECS);
9358
9359         return pqi_ctrl_init_resume(ctrl_info);
9360 }
9361
9362 static int pqi_freeze(struct device *dev)
9363 {
9364         return pqi_suspend_or_freeze(dev, false);
9365 }
9366
9367 static int pqi_thaw(struct device *dev)
9368 {
9369         int rc;
9370         struct pci_dev *pci_dev;
9371         struct pqi_ctrl_info *ctrl_info;
9372
9373         pci_dev = to_pci_dev(dev);
9374         ctrl_info = pci_get_drvdata(pci_dev);
9375
9376         rc = pqi_request_irqs(ctrl_info);
9377         if (rc)
9378                 return rc;
9379
9380         ctrl_info->controller_online = true;
9381         ctrl_info->pqi_mode_enabled = true;
9382
9383         pqi_ctrl_unblock_device_reset(ctrl_info);
9384         pqi_ctrl_unblock_requests(ctrl_info);
9385         pqi_scsi_unblock_requests(ctrl_info);
9386         pqi_ctrl_unblock_scan(ctrl_info);
9387
9388         return 0;
9389 }
9390
9391 static int pqi_poweroff(struct device *dev)
9392 {
9393         struct pci_dev *pci_dev;
9394         struct pqi_ctrl_info *ctrl_info;
9395         enum bmic_flush_cache_shutdown_event shutdown_event;
9396
9397         pci_dev = to_pci_dev(dev);
9398         ctrl_info = pci_get_drvdata(pci_dev);
9399
9400         shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9401         pqi_flush_cache(ctrl_info, shutdown_event);
9402
9403         return 0;
9404 }
9405
9406 static const struct dev_pm_ops pqi_pm_ops = {
9407         .suspend = pqi_suspend,
9408         .resume = pqi_resume_or_restore,
9409         .freeze = pqi_freeze,
9410         .thaw = pqi_thaw,
9411         .poweroff = pqi_poweroff,
9412         .restore = pqi_resume_or_restore,
9413 };
9414
9415 #endif /* CONFIG_PM */
9416
9417 /* Define the PCI IDs for the controllers that we support. */
9418 static const struct pci_device_id pqi_pci_id_table[] = {
9419         {
9420                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9421                                0x105b, 0x1211)
9422         },
9423         {
9424                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9425                                0x105b, 0x1321)
9426         },
9427         {
9428                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9429                                0x152d, 0x8a22)
9430         },
9431         {
9432                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9433                                0x152d, 0x8a23)
9434         },
9435         {
9436                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9437                                0x152d, 0x8a24)
9438         },
9439         {
9440                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9441                                0x152d, 0x8a36)
9442         },
9443         {
9444                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9445                                0x152d, 0x8a37)
9446         },
9447         {
9448                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9449                                0x193d, 0x1104)
9450         },
9451         {
9452                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9453                                0x193d, 0x1105)
9454         },
9455         {
9456                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9457                                0x193d, 0x1106)
9458         },
9459         {
9460                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9461                                0x193d, 0x1107)
9462         },
9463         {
9464                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9465                                0x193d, 0x1108)
9466         },
9467         {
9468                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9469                                0x193d, 0x1109)
9470         },
9471         {
9472                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9473                                0x193d, 0x110b)
9474         },
9475         {
9476                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9477                                0x193d, 0x8460)
9478         },
9479         {
9480                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9481                                0x193d, 0x8461)
9482         },
9483         {
9484                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9485                                0x193d, 0xc460)
9486         },
9487         {
9488                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9489                                0x193d, 0xc461)
9490         },
9491         {
9492                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9493                                0x193d, 0xf460)
9494         },
9495         {
9496                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9497                                0x193d, 0xf461)
9498         },
9499         {
9500                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9501                                0x1bd4, 0x0045)
9502         },
9503         {
9504                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9505                                0x1bd4, 0x0046)
9506         },
9507         {
9508                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9509                                0x1bd4, 0x0047)
9510         },
9511         {
9512                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9513                                0x1bd4, 0x0048)
9514         },
9515         {
9516                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9517                                0x1bd4, 0x004a)
9518         },
9519         {
9520                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9521                                0x1bd4, 0x004b)
9522         },
9523         {
9524                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9525                                0x1bd4, 0x004c)
9526         },
9527         {
9528                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9529                                0x1bd4, 0x004f)
9530         },
9531         {
9532                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9533                                0x1bd4, 0x0051)
9534         },
9535         {
9536                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9537                                0x1bd4, 0x0052)
9538         },
9539         {
9540                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9541                                0x1bd4, 0x0053)
9542         },
9543         {
9544                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9545                                0x1bd4, 0x0054)
9546         },
9547         {
9548                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9549                                0x1bd4, 0x006b)
9550         },
9551         {
9552                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9553                                0x1bd4, 0x006c)
9554         },
9555         {
9556                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9557                                0x1bd4, 0x006d)
9558         },
9559         {
9560                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9561                                0x1bd4, 0x006f)
9562         },
9563         {
9564                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9565                                0x1bd4, 0x0070)
9566         },
9567         {
9568                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9569                                0x1bd4, 0x0071)
9570         },
9571         {
9572                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9573                                0x1bd4, 0x0072)
9574         },
9575         {
9576                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9577                                0x1bd4, 0x0086)
9578         },
9579         {
9580                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9581                                0x1bd4, 0x0087)
9582         },
9583         {
9584                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9585                                0x1bd4, 0x0088)
9586         },
9587         {
9588                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9589                                0x1bd4, 0x0089)
9590         },
9591         {
9592                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9593                                0x19e5, 0xd227)
9594         },
9595         {
9596                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9597                                0x19e5, 0xd228)
9598         },
9599         {
9600                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9601                                0x19e5, 0xd229)
9602         },
9603         {
9604                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9605                                0x19e5, 0xd22a)
9606         },
9607         {
9608                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9609                                0x19e5, 0xd22b)
9610         },
9611         {
9612                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9613                                0x19e5, 0xd22c)
9614         },
9615         {
9616                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9617                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
9618         },
9619         {
9620                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9621                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
9622         },
9623         {
9624                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9625                                PCI_VENDOR_ID_ADAPTEC2, 0x0659)
9626         },
9627         {
9628                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9629                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
9630         },
9631         {
9632                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9633                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
9634         },
9635         {
9636                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9637                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
9638         },
9639         {
9640                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9641                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
9642         },
9643         {
9644                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9645                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
9646         },
9647         {
9648                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9649                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
9650         },
9651         {
9652                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9653                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
9654         },
9655         {
9656                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9657                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
9658         },
9659         {
9660                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9661                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
9662         },
9663         {
9664                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9665                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
9666         },
9667         {
9668                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9669                                PCI_VENDOR_ID_ADAPTEC2, 0x080a)
9670         },
9671         {
9672                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9673                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
9674         },
9675         {
9676                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9677                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
9678         },
9679         {
9680                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9681                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
9682         },
9683         {
9684                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9685                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
9686         },
9687         {
9688                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9689                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
9690         },
9691         {
9692                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9693                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
9694         },
9695         {
9696                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9697                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
9698         },
9699         {
9700                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9701                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
9702         },
9703         {
9704                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9705                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
9706         },
9707         {
9708                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9709                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
9710         },
9711         {
9712                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9713                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
9714         },
9715         {
9716                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9717                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
9718         },
9719         {
9720                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9721                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
9722         },
9723         {
9724                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9725                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
9726         },
9727         {
9728                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9729                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
9730         },
9731         {
9732                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9733                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
9734         },
9735         {
9736                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9737                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
9738         },
9739         {
9740                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9741                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
9742         },
9743         {
9744                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9745                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
9746         },
9747         {
9748                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9749                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
9750         },
9751         {
9752                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9753                                PCI_VENDOR_ID_ADAPTEC2, 0x1304)
9754         },
9755         {
9756                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9757                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
9758         },
9759         {
9760                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9761                                PCI_VENDOR_ID_ADAPTEC2, 0x1400)
9762         },
9763         {
9764                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9765                                PCI_VENDOR_ID_ADAPTEC2, 0x1402)
9766         },
9767         {
9768                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9769                                PCI_VENDOR_ID_ADAPTEC2, 0x1410)
9770         },
9771         {
9772                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9773                                PCI_VENDOR_ID_ADAPTEC2, 0x1411)
9774         },
9775         {
9776                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9777                                PCI_VENDOR_ID_ADAPTEC2, 0x1412)
9778         },
9779         {
9780                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9781                                PCI_VENDOR_ID_ADAPTEC2, 0x1420)
9782         },
9783         {
9784                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9785                                PCI_VENDOR_ID_ADAPTEC2, 0x1430)
9786         },
9787         {
9788                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9789                                PCI_VENDOR_ID_ADAPTEC2, 0x1440)
9790         },
9791         {
9792                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9793                                PCI_VENDOR_ID_ADAPTEC2, 0x1441)
9794         },
9795         {
9796                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9797                                PCI_VENDOR_ID_ADAPTEC2, 0x1450)
9798         },
9799         {
9800                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9801                                PCI_VENDOR_ID_ADAPTEC2, 0x1452)
9802         },
9803         {
9804                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9805                                PCI_VENDOR_ID_ADAPTEC2, 0x1460)
9806         },
9807         {
9808                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9809                                PCI_VENDOR_ID_ADAPTEC2, 0x1461)
9810         },
9811         {
9812                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9813                                PCI_VENDOR_ID_ADAPTEC2, 0x1462)
9814         },
9815         {
9816                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9817                                PCI_VENDOR_ID_ADAPTEC2, 0x1463)
9818         },
9819         {
9820                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9821                                PCI_VENDOR_ID_ADAPTEC2, 0x1470)
9822         },
9823         {
9824                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9825                                PCI_VENDOR_ID_ADAPTEC2, 0x1471)
9826         },
9827         {
9828                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9829                                PCI_VENDOR_ID_ADAPTEC2, 0x1472)
9830         },
9831         {
9832                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9833                                PCI_VENDOR_ID_ADAPTEC2, 0x1473)
9834         },
9835         {
9836                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9837                                PCI_VENDOR_ID_ADAPTEC2, 0x1474)
9838         },
9839         {
9840                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9841                                PCI_VENDOR_ID_ADAPTEC2, 0x1475)
9842         },
9843         {
9844                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9845                                PCI_VENDOR_ID_ADAPTEC2, 0x1480)
9846         },
9847         {
9848                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9849                                PCI_VENDOR_ID_ADAPTEC2, 0x1490)
9850         },
9851         {
9852                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9853                                PCI_VENDOR_ID_ADAPTEC2, 0x1491)
9854         },
9855         {
9856                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9857                                PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
9858         },
9859         {
9860                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9861                                PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
9862         },
9863         {
9864                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9865                                PCI_VENDOR_ID_ADAPTEC2, 0x14a2)
9866         },
9867         {
9868                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9869                                PCI_VENDOR_ID_ADAPTEC2, 0x14a4)
9870         },
9871         {
9872                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9873                                PCI_VENDOR_ID_ADAPTEC2, 0x14a5)
9874         },
9875         {
9876                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9877                                PCI_VENDOR_ID_ADAPTEC2, 0x14a6)
9878         },
9879         {
9880                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9881                                PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
9882         },
9883         {
9884                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9885                                PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
9886         },
9887         {
9888                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9889                                PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
9890         },
9891         {
9892                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9893                                PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
9894         },
9895         {
9896                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9897                                PCI_VENDOR_ID_ADAPTEC2, 0x14c2)
9898         },
9899         {
9900                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9901                                PCI_VENDOR_ID_ADAPTEC2, 0x14c3)
9902         },
9903         {
9904                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9905                                PCI_VENDOR_ID_ADAPTEC2, 0x14c4)
9906         },
9907         {
9908                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9909                                PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
9910         },
9911         {
9912                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9913                                PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
9914         },
9915         {
9916                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9917                                PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
9918         },
9919         {
9920                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9921                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
9922         },
9923         {
9924                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9925                                PCI_VENDOR_ID_DELL, 0x1fe0)
9926         },
9927         {
9928                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9929                                PCI_VENDOR_ID_HP, 0x0600)
9930         },
9931         {
9932                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9933                                PCI_VENDOR_ID_HP, 0x0601)
9934         },
9935         {
9936                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9937                                PCI_VENDOR_ID_HP, 0x0602)
9938         },
9939         {
9940                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9941                                PCI_VENDOR_ID_HP, 0x0603)
9942         },
9943         {
9944                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9945                                PCI_VENDOR_ID_HP, 0x0609)
9946         },
9947         {
9948                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9949                                PCI_VENDOR_ID_HP, 0x0650)
9950         },
9951         {
9952                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9953                                PCI_VENDOR_ID_HP, 0x0651)
9954         },
9955         {
9956                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9957                                PCI_VENDOR_ID_HP, 0x0652)
9958         },
9959         {
9960                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9961                                PCI_VENDOR_ID_HP, 0x0653)
9962         },
9963         {
9964                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9965                                PCI_VENDOR_ID_HP, 0x0654)
9966         },
9967         {
9968                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9969                                PCI_VENDOR_ID_HP, 0x0655)
9970         },
9971         {
9972                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9973                                PCI_VENDOR_ID_HP, 0x0700)
9974         },
9975         {
9976                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9977                                PCI_VENDOR_ID_HP, 0x0701)
9978         },
9979         {
9980                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9981                                PCI_VENDOR_ID_HP, 0x1001)
9982         },
9983         {
9984                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9985                                PCI_VENDOR_ID_HP, 0x1002)
9986         },
9987         {
9988                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9989                                PCI_VENDOR_ID_HP, 0x1100)
9990         },
9991         {
9992                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9993                                PCI_VENDOR_ID_HP, 0x1101)
9994         },
9995         {
9996                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9997                                0x1590, 0x0294)
9998         },
9999         {
10000                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10001                                0x1590, 0x02db)
10002         },
10003         {
10004                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10005                                0x1590, 0x02dc)
10006         },
10007         {
10008                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10009                                0x1590, 0x032e)
10010         },
10011         {
10012                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10013                                0x1590, 0x036f)
10014         },
10015         {
10016                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10017                                0x1590, 0x0381)
10018         },
10019         {
10020                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10021                                0x1590, 0x0382)
10022         },
10023         {
10024                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10025                                0x1590, 0x0383)
10026         },
10027         {
10028                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10029                                0x1d8d, 0x0800)
10030         },
10031         {
10032                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10033                                0x1d8d, 0x0908)
10034         },
10035         {
10036                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10037                                0x1d8d, 0x0806)
10038         },
10039         {
10040                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10041                                0x1d8d, 0x0916)
10042         },
10043         {
10044                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10045                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
10046         },
10047         {
10048                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10049                                0x1dfc, 0x3161)
10050         },
10051         {
10052                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10053                                0x1f0c, 0x3161)
10054         },
10055         {
10056                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10057                                0x1cf2, 0x0804)
10058         },
10059         {
10060                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10061                                0x1cf2, 0x0805)
10062         },
10063         {
10064                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10065                                0x1cf2, 0x0806)
10066         },
10067         {
10068                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10069                                0x1cf2, 0x5445)
10070         },
10071         {
10072                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10073                                0x1cf2, 0x5446)
10074         },
10075         {
10076                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10077                                0x1cf2, 0x5447)
10078         },
10079         {
10080                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10081                                0x1cf2, 0x5449)
10082         },
10083         {
10084                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10085                                0x1cf2, 0x544a)
10086         },
10087         {
10088                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10089                                0x1cf2, 0x544b)
10090         },
10091         {
10092                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10093                                0x1cf2, 0x544d)
10094         },
10095         {
10096                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10097                                0x1cf2, 0x544e)
10098         },
10099         {
10100                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10101                                0x1cf2, 0x544f)
10102         },
10103         {
10104                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10105                                0x1cf2, 0x54da)
10106         },
10107         {
10108                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10109                                0x1cf2, 0x54db)
10110         },
10111         {
10112                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10113                                0x1cf2, 0x54dc)
10114         },
10115         {
10116                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10117                                0x1cf2, 0x0b27)
10118         },
10119         {
10120                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10121                                0x1cf2, 0x0b29)
10122         },
10123         {
10124                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10125                                0x1cf2, 0x0b45)
10126         },
10127         {
10128                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10129                                0x1cc4, 0x0101)
10130         },
10131         {
10132                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10133                                0x1cc4, 0x0201)
10134         },
10135         {
10136                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10137                                PCI_VENDOR_ID_LENOVO, 0x0220)
10138         },
10139         {
10140                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10141                                PCI_VENDOR_ID_LENOVO, 0x0221)
10142         },
10143         {
10144                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10145                                PCI_VENDOR_ID_LENOVO, 0x0520)
10146         },
10147         {
10148                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10149                                PCI_VENDOR_ID_LENOVO, 0x0522)
10150         },
10151         {
10152                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10153                                PCI_VENDOR_ID_LENOVO, 0x0620)
10154         },
10155         {
10156                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10157                                PCI_VENDOR_ID_LENOVO, 0x0621)
10158         },
10159         {
10160                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10161                                PCI_VENDOR_ID_LENOVO, 0x0622)
10162         },
10163         {
10164                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10165                                PCI_VENDOR_ID_LENOVO, 0x0623)
10166         },
10167         {
10168                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10169                                 0x1014, 0x0718)
10170         },
10171         {
10172                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10173                                0x1137, 0x02f8)
10174         },
10175         {
10176                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10177                                0x1137, 0x02f9)
10178         },
10179         {
10180                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10181                                0x1137, 0x02fa)
10182         },
10183         {
10184                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10185                                 0x1e93, 0x1000)
10186         },
10187         {
10188                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10189                                 0x1e93, 0x1001)
10190         },
10191         {
10192                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10193                                 0x1e93, 0x1002)
10194         },
10195         {
10196                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10197                                 0x1e93, 0x1005)
10198         },
10199         {
10200                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10201                                 0x1f51, 0x1001)
10202         },
10203         {
10204                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10205                                 0x1f51, 0x1002)
10206         },
10207         {
10208                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10209                                 0x1f51, 0x1003)
10210         },
10211         {
10212                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10213                                 0x1f51, 0x1004)
10214         },
10215         {
10216                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10217                                 0x1f51, 0x1005)
10218         },
10219         {
10220                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10221                                 0x1f51, 0x1006)
10222         },
10223         {
10224                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10225                                 0x1f51, 0x1007)
10226         },
10227         {
10228                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10229                                 0x1f51, 0x1008)
10230         },
10231         {
10232                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10233                                 0x1f51, 0x1009)
10234         },
10235         {
10236                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10237                                 0x1f51, 0x100a)
10238         },
10239         {
10240                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10241                                0x1f51, 0x100e)
10242         },
10243         {
10244                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10245                                0x1f51, 0x100f)
10246         },
10247         {
10248                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10249                                0x1f51, 0x1010)
10250         },
10251         {
10252                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10253                                0x1f51, 0x1011)
10254         },
10255         {
10256                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10257                                0x1f51, 0x1043)
10258         },
10259         {
10260                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10261                                0x1f51, 0x1044)
10262         },
10263         {
10264                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10265                                0x1f51, 0x1045)
10266         },
10267         {
10268                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10269                                PCI_ANY_ID, PCI_ANY_ID)
10270         },
10271         { 0 }
10272 };
10273
10274 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
10275
10276 static struct pci_driver pqi_pci_driver = {
10277         .name = DRIVER_NAME_SHORT,
10278         .id_table = pqi_pci_id_table,
10279         .probe = pqi_pci_probe,
10280         .remove = pqi_pci_remove,
10281         .shutdown = pqi_shutdown,
10282 #if defined(CONFIG_PM)
10283         .driver = {
10284                 .pm = &pqi_pm_ops
10285         },
10286 #endif
10287 };
10288
10289 static int __init pqi_init(void)
10290 {
10291         int rc;
10292
10293         pr_info(DRIVER_NAME "\n");
10294         pqi_verify_structures();
10295         sis_verify_structures();
10296
10297         pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
10298         if (!pqi_sas_transport_template)
10299                 return -ENODEV;
10300
10301         pqi_process_module_params();
10302
10303         rc = pci_register_driver(&pqi_pci_driver);
10304         if (rc)
10305                 sas_release_transport(pqi_sas_transport_template);
10306
10307         return rc;
10308 }
10309
10310 static void __exit pqi_cleanup(void)
10311 {
10312         pci_unregister_driver(&pqi_pci_driver);
10313         sas_release_transport(pqi_sas_transport_template);
10314 }
10315
10316 module_init(pqi_init);
10317 module_exit(pqi_cleanup);
10318
10319 static void pqi_verify_structures(void)
10320 {
10321         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10322                 sis_host_to_ctrl_doorbell) != 0x20);
10323         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10324                 sis_interrupt_mask) != 0x34);
10325         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10326                 sis_ctrl_to_host_doorbell) != 0x9c);
10327         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10328                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
10329         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10330                 sis_driver_scratch) != 0xb0);
10331         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10332                 sis_product_identifier) != 0xb4);
10333         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10334                 sis_firmware_status) != 0xbc);
10335         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10336                 sis_ctrl_shutdown_reason_code) != 0xcc);
10337         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10338                 sis_mailbox) != 0x1000);
10339         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10340                 pqi_registers) != 0x4000);
10341
10342         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10343                 iu_type) != 0x0);
10344         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10345                 iu_length) != 0x2);
10346         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10347                 response_queue_id) != 0x4);
10348         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10349                 driver_flags) != 0x6);
10350         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
10351
10352         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10353                 status) != 0x0);
10354         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10355                 service_response) != 0x1);
10356         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10357                 data_present) != 0x2);
10358         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10359                 reserved) != 0x3);
10360         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10361                 residual_count) != 0x4);
10362         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10363                 data_length) != 0x8);
10364         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10365                 reserved1) != 0xa);
10366         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10367                 data) != 0xc);
10368         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
10369
10370         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10371                 data_in_result) != 0x0);
10372         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10373                 data_out_result) != 0x1);
10374         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10375                 reserved) != 0x2);
10376         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10377                 status) != 0x5);
10378         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10379                 status_qualifier) != 0x6);
10380         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10381                 sense_data_length) != 0x8);
10382         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10383                 response_data_length) != 0xa);
10384         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10385                 data_in_transferred) != 0xc);
10386         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10387                 data_out_transferred) != 0x10);
10388         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10389                 data) != 0x14);
10390         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
10391
10392         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10393                 signature) != 0x0);
10394         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10395                 function_and_status_code) != 0x8);
10396         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10397                 max_admin_iq_elements) != 0x10);
10398         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10399                 max_admin_oq_elements) != 0x11);
10400         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10401                 admin_iq_element_length) != 0x12);
10402         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10403                 admin_oq_element_length) != 0x13);
10404         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10405                 max_reset_timeout) != 0x14);
10406         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10407                 legacy_intx_status) != 0x18);
10408         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10409                 legacy_intx_mask_set) != 0x1c);
10410         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10411                 legacy_intx_mask_clear) != 0x20);
10412         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10413                 device_status) != 0x40);
10414         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10415                 admin_iq_pi_offset) != 0x48);
10416         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10417                 admin_oq_ci_offset) != 0x50);
10418         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10419                 admin_iq_element_array_addr) != 0x58);
10420         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10421                 admin_oq_element_array_addr) != 0x60);
10422         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10423                 admin_iq_ci_addr) != 0x68);
10424         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10425                 admin_oq_pi_addr) != 0x70);
10426         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10427                 admin_iq_num_elements) != 0x78);
10428         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10429                 admin_oq_num_elements) != 0x79);
10430         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10431                 admin_queue_int_msg_num) != 0x7a);
10432         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10433                 device_error) != 0x80);
10434         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10435                 error_details) != 0x88);
10436         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10437                 device_reset) != 0x90);
10438         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10439                 power_action) != 0x94);
10440         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
10441
10442         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10443                 header.iu_type) != 0);
10444         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10445                 header.iu_length) != 2);
10446         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10447                 header.driver_flags) != 6);
10448         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10449                 request_id) != 8);
10450         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10451                 function_code) != 10);
10452         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10453                 data.report_device_capability.buffer_length) != 44);
10454         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10455                 data.report_device_capability.sg_descriptor) != 48);
10456         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10457                 data.create_operational_iq.queue_id) != 12);
10458         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10459                 data.create_operational_iq.element_array_addr) != 16);
10460         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10461                 data.create_operational_iq.ci_addr) != 24);
10462         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10463                 data.create_operational_iq.num_elements) != 32);
10464         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10465                 data.create_operational_iq.element_length) != 34);
10466         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10467                 data.create_operational_iq.queue_protocol) != 36);
10468         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10469                 data.create_operational_oq.queue_id) != 12);
10470         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10471                 data.create_operational_oq.element_array_addr) != 16);
10472         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10473                 data.create_operational_oq.pi_addr) != 24);
10474         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10475                 data.create_operational_oq.num_elements) != 32);
10476         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10477                 data.create_operational_oq.element_length) != 34);
10478         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10479                 data.create_operational_oq.queue_protocol) != 36);
10480         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10481                 data.create_operational_oq.int_msg_num) != 40);
10482         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10483                 data.create_operational_oq.coalescing_count) != 42);
10484         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10485                 data.create_operational_oq.min_coalescing_time) != 44);
10486         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10487                 data.create_operational_oq.max_coalescing_time) != 48);
10488         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10489                 data.delete_operational_queue.queue_id) != 12);
10490         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
10491         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10492                 data.create_operational_iq) != 64 - 11);
10493         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10494                 data.create_operational_oq) != 64 - 11);
10495         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10496                 data.delete_operational_queue) != 64 - 11);
10497
10498         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10499                 header.iu_type) != 0);
10500         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10501                 header.iu_length) != 2);
10502         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10503                 header.driver_flags) != 6);
10504         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10505                 request_id) != 8);
10506         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10507                 function_code) != 10);
10508         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10509                 status) != 11);
10510         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10511                 data.create_operational_iq.status_descriptor) != 12);
10512         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10513                 data.create_operational_iq.iq_pi_offset) != 16);
10514         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10515                 data.create_operational_oq.status_descriptor) != 12);
10516         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10517                 data.create_operational_oq.oq_ci_offset) != 16);
10518         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
10519
10520         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10521                 header.iu_type) != 0);
10522         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10523                 header.iu_length) != 2);
10524         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10525                 header.response_queue_id) != 4);
10526         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10527                 header.driver_flags) != 6);
10528         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10529                 request_id) != 8);
10530         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10531                 nexus_id) != 10);
10532         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10533                 buffer_length) != 12);
10534         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10535                 lun_number) != 16);
10536         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10537                 protocol_specific) != 24);
10538         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10539                 error_index) != 27);
10540         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10541                 cdb) != 32);
10542         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10543                 timeout) != 60);
10544         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10545                 sg_descriptors) != 64);
10546         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
10547                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10548
10549         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10550                 header.iu_type) != 0);
10551         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10552                 header.iu_length) != 2);
10553         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10554                 header.response_queue_id) != 4);
10555         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10556                 header.driver_flags) != 6);
10557         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10558                 request_id) != 8);
10559         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10560                 nexus_id) != 12);
10561         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10562                 buffer_length) != 16);
10563         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10564                 data_encryption_key_index) != 22);
10565         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10566                 encrypt_tweak_lower) != 24);
10567         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10568                 encrypt_tweak_upper) != 28);
10569         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10570                 cdb) != 32);
10571         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10572                 error_index) != 48);
10573         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10574                 num_sg_descriptors) != 50);
10575         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10576                 cdb_length) != 51);
10577         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10578                 lun_number) != 52);
10579         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10580                 sg_descriptors) != 64);
10581         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
10582                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10583
10584         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10585                 header.iu_type) != 0);
10586         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10587                 header.iu_length) != 2);
10588         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10589                 request_id) != 8);
10590         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10591                 error_index) != 10);
10592
10593         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10594                 header.iu_type) != 0);
10595         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10596                 header.iu_length) != 2);
10597         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10598                 header.response_queue_id) != 4);
10599         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10600                 request_id) != 8);
10601         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10602                 data.report_event_configuration.buffer_length) != 12);
10603         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10604                 data.report_event_configuration.sg_descriptors) != 16);
10605         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10606                 data.set_event_configuration.global_event_oq_id) != 10);
10607         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10608                 data.set_event_configuration.buffer_length) != 12);
10609         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10610                 data.set_event_configuration.sg_descriptors) != 16);
10611
10612         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10613                 max_inbound_iu_length) != 6);
10614         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10615                 max_outbound_iu_length) != 14);
10616         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
10617
10618         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10619                 data_length) != 0);
10620         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10621                 iq_arbitration_priority_support_bitmask) != 8);
10622         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10623                 maximum_aw_a) != 9);
10624         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10625                 maximum_aw_b) != 10);
10626         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10627                 maximum_aw_c) != 11);
10628         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10629                 max_inbound_queues) != 16);
10630         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10631                 max_elements_per_iq) != 18);
10632         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10633                 max_iq_element_length) != 24);
10634         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10635                 min_iq_element_length) != 26);
10636         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10637                 max_outbound_queues) != 30);
10638         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10639                 max_elements_per_oq) != 32);
10640         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10641                 intr_coalescing_time_granularity) != 34);
10642         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10643                 max_oq_element_length) != 36);
10644         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10645                 min_oq_element_length) != 38);
10646         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10647                 iu_layer_descriptors) != 64);
10648         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
10649
10650         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10651                 event_type) != 0);
10652         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10653                 oq_id) != 2);
10654         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
10655
10656         BUILD_BUG_ON(offsetof(struct pqi_event_config,
10657                 num_event_descriptors) != 2);
10658         BUILD_BUG_ON(offsetof(struct pqi_event_config,
10659                 descriptors) != 4);
10660
10661         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
10662                 ARRAY_SIZE(pqi_supported_event_types));
10663
10664         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10665                 header.iu_type) != 0);
10666         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10667                 header.iu_length) != 2);
10668         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10669                 event_type) != 8);
10670         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10671                 event_id) != 10);
10672         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10673                 additional_event_id) != 12);
10674         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10675                 data) != 16);
10676         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
10677
10678         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10679                 header.iu_type) != 0);
10680         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10681                 header.iu_length) != 2);
10682         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10683                 event_type) != 8);
10684         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10685                 event_id) != 10);
10686         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10687                 additional_event_id) != 12);
10688         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
10689
10690         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10691                 header.iu_type) != 0);
10692         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10693                 header.iu_length) != 2);
10694         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10695                 request_id) != 8);
10696         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10697                 nexus_id) != 10);
10698         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10699                 timeout) != 14);
10700         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10701                 lun_number) != 16);
10702         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10703                 protocol_specific) != 24);
10704         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10705                 outbound_queue_id_to_manage) != 26);
10706         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10707                 request_id_to_manage) != 28);
10708         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10709                 task_management_function) != 30);
10710         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
10711
10712         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10713                 header.iu_type) != 0);
10714         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10715                 header.iu_length) != 2);
10716         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10717                 request_id) != 8);
10718         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10719                 nexus_id) != 10);
10720         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10721                 additional_response_info) != 12);
10722         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10723                 response_code) != 15);
10724         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
10725
10726         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10727                 configured_logical_drive_count) != 0);
10728         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10729                 configuration_signature) != 1);
10730         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10731                 firmware_version_short) != 5);
10732         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10733                 extended_logical_unit_count) != 154);
10734         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10735                 firmware_build_number) != 190);
10736         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10737                 vendor_id) != 200);
10738         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10739                 product_id) != 208);
10740         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10741                 extra_controller_flags) != 286);
10742         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10743                 controller_mode) != 292);
10744         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10745                 spare_part_number) != 293);
10746         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10747                 firmware_version_long) != 325);
10748
10749         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10750                 phys_bay_in_box) != 115);
10751         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10752                 device_type) != 120);
10753         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10754                 redundant_path_present_map) != 1736);
10755         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10756                 active_path_number) != 1738);
10757         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10758                 alternate_paths_phys_connector) != 1739);
10759         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10760                 alternate_paths_phys_box_on_port) != 1755);
10761         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10762                 current_queue_depth_limit) != 1796);
10763         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
10764
10765         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
10766         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10767                 page_code) != 0);
10768         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10769                 subpage_code) != 1);
10770         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10771                 buffer_length) != 2);
10772
10773         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
10774         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10775                 page_code) != 0);
10776         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10777                 subpage_code) != 1);
10778         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10779                 page_length) != 2);
10780
10781         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
10782                 != 18);
10783         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10784                 header) != 0);
10785         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10786                 firmware_read_support) != 4);
10787         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10788                 driver_read_support) != 5);
10789         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10790                 firmware_write_support) != 6);
10791         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10792                 driver_write_support) != 7);
10793         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10794                 max_transfer_encrypted_sas_sata) != 8);
10795         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10796                 max_transfer_encrypted_nvme) != 10);
10797         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10798                 max_write_raid_5_6) != 12);
10799         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10800                 max_write_raid_1_10_2drive) != 14);
10801         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10802                 max_write_raid_1_10_3drive) != 16);
10803
10804         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
10805         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
10806         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
10807                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10808         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
10809                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10810         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
10811         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
10812                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10813         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
10814         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
10815                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10816
10817         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
10818         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
10819                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
10820 }