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) 2019-2022 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          "2.1.20-035"
  37 #define DRIVER_MAJOR            2
  38 #define DRIVER_MINOR            1
  39 #define DRIVER_RELEASE          20
  40 #define DRIVER_REVISION         35
  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 MODULE_AUTHOR("Microchip");
  52 MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
  53         DRIVER_VERSION);
  54 MODULE_VERSION(DRIVER_VERSION);
  55 MODULE_LICENSE("GPL");
  56
  57 struct pqi_cmd_priv {
  58         int this_residual;
  59 };
  60
  61 static struct pqi_cmd_priv *pqi_cmd_priv(struct scsi_cmnd *cmd)
  62 {
  63         return scsi_cmd_priv(cmd);
  64 }
  65
  66 static void pqi_verify_structures(void);
  67 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
  68         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason);
  69 static void pqi_ctrl_offline_worker(struct work_struct *work);
  70 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  71 static void pqi_scan_start(struct Scsi_Host *shost);
  72 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  73         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  74         struct pqi_io_request *io_request);
  75 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  76         struct pqi_iu_header *request, unsigned int flags,
  77         struct pqi_raid_error_info *error_info);
  78 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  79         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  80         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  81         struct pqi_encryption_info *encryption_info, bool raid_bypass, bool io_high_prio);
  82 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
  83         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  84         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  85         struct pqi_scsi_dev_raid_map_data *rmd);
  86 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
  87         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  88         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  89         struct pqi_scsi_dev_raid_map_data *rmd);
  90 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  91 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  92 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
  93 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
  94 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  95 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  96 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  97         struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs);
  98 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info);
  99
 100 /* for flags argument to pqi_submit_raid_request_synchronous() */
 101 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
 102
 103 static struct scsi_transport_template *pqi_sas_transport_template;
 104
 105 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
 106
 107 enum pqi_lockup_action {
 108         NONE,
 109         REBOOT,
 110         PANIC
 111 };
 112
 113 static enum pqi_lockup_action pqi_lockup_action = NONE;
 114
 115 static struct {
 116         enum pqi_lockup_action  action;
 117         char                    *name;
 118 } pqi_lockup_actions[] = {
 119         {
 120                 .action = NONE,
 121                 .name = "none",
 122         },
 123         {
 124                 .action = REBOOT,
 125                 .name = "reboot",
 126         },
 127         {
 128                 .action = PANIC,
 129                 .name = "panic",
 130         },
 131 };
 132
 133 static unsigned int pqi_supported_event_types[] = {
 134         PQI_EVENT_TYPE_HOTPLUG,
 135         PQI_EVENT_TYPE_HARDWARE,
 136         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 137         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 138         PQI_EVENT_TYPE_OFA,
 139         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 140         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 141 };
 142
 143 static int pqi_disable_device_id_wildcards;
 144 module_param_named(disable_device_id_wildcards,
 145         pqi_disable_device_id_wildcards, int, 0644);
 146 MODULE_PARM_DESC(disable_device_id_wildcards,
 147         "Disable device ID wildcards.");
 148
 149 static int pqi_disable_heartbeat;
 150 module_param_named(disable_heartbeat,
 151         pqi_disable_heartbeat, int, 0644);
 152 MODULE_PARM_DESC(disable_heartbeat,
 153         "Disable heartbeat.");
 154
 155 static int pqi_disable_ctrl_shutdown;
 156 module_param_named(disable_ctrl_shutdown,
 157         pqi_disable_ctrl_shutdown, int, 0644);
 158 MODULE_PARM_DESC(disable_ctrl_shutdown,
 159         "Disable controller shutdown when controller locked up.");
 160
 161 static char *pqi_lockup_action_param;
 162 module_param_named(lockup_action,
 163         pqi_lockup_action_param, charp, 0644);
 164 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 165         "\t\tSupported: none, reboot, panic\n"
 166         "\t\tDefault: none");
 167
 168 static int pqi_expose_ld_first;
 169 module_param_named(expose_ld_first,
 170         pqi_expose_ld_first, int, 0644);
 171 MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
 172
 173 static int pqi_hide_vsep;
 174 module_param_named(hide_vsep,
 175         pqi_hide_vsep, int, 0644);
 176 MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
 177
 178 static int pqi_disable_managed_interrupts;
 179 module_param_named(disable_managed_interrupts,
 180         pqi_disable_managed_interrupts, int, 0644);
 181 MODULE_PARM_DESC(disable_managed_interrupts,
 182         "Disable the kernel automatically assigning SMP affinity to IRQs.");
 183
 184 static unsigned int pqi_ctrl_ready_timeout_secs;
 185 module_param_named(ctrl_ready_timeout,
 186         pqi_ctrl_ready_timeout_secs, uint, 0644);
 187 MODULE_PARM_DESC(ctrl_ready_timeout,
 188         "Timeout in seconds for driver to wait for controller ready.");
 189
 190 static char *raid_levels[] = {
 191         "RAID-0",
 192         "RAID-4",
 193         "RAID-1(1+0)",
 194         "RAID-5",
 195         "RAID-5+1",
 196         "RAID-6",
 197         "RAID-1(Triple)",
 198 };
 199
 200 static char *pqi_raid_level_to_string(u8 raid_level)
 201 {
 202         if (raid_level < ARRAY_SIZE(raid_levels))
 203                 return raid_levels[raid_level];
 204
 205         return "RAID UNKNOWN";
 206 }
 207
 208 #define SA_RAID_0               0
 209 #define SA_RAID_4               1
 210 #define SA_RAID_1               2       /* also used for RAID 10 */
 211 #define SA_RAID_5               3       /* also used for RAID 50 */
 212 #define SA_RAID_51              4
 213 #define SA_RAID_6               5       /* also used for RAID 60 */
 214 #define SA_RAID_TRIPLE          6       /* also used for RAID 1+0 Triple */
 215 #define SA_RAID_MAX             SA_RAID_TRIPLE
 216 #define SA_RAID_UNKNOWN         0xff
 217
 218 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 219 {
 220         pqi_prep_for_scsi_done(scmd);
 221         scsi_done(scmd);
 222 }
 223
 224 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 225 {
 226         sdev->no_write_same = 1;
 227 }
 228
 229 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 230 {
 231         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 232 }
 233
 234 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 235 {
 236         return !device->is_physical_device;
 237 }
 238
 239 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 240 {
 241         return scsi3addr[2] != 0;
 242 }
 243
 244 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         return !ctrl_info->controller_online;
 247 }
 248
 249 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 250 {
 251         if (ctrl_info->controller_online)
 252                 if (!sis_is_firmware_running(ctrl_info))
 253                         pqi_take_ctrl_offline(ctrl_info, PQI_FIRMWARE_KERNEL_NOT_UP);
 254 }
 255
 256 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 257 {
 258         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 259 }
 260
 261 #define PQI_DRIVER_SCRATCH_PQI_MODE                     0x1
 262 #define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED          0x2
 263
 264 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
 265 {
 266         return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
 267 }
 268
 269 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 270         enum pqi_ctrl_mode mode)
 271 {
 272         u32 driver_scratch;
 273
 274         driver_scratch = sis_read_driver_scratch(ctrl_info);
 275
 276         if (mode == PQI_MODE)
 277                 driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
 278         else
 279                 driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
 280
 281         sis_write_driver_scratch(ctrl_info, driver_scratch);
 282 }
 283
 284 static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
 285 {
 286         return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
 287 }
 288
 289 static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
 290 {
 291         u32 driver_scratch;
 292
 293         driver_scratch = sis_read_driver_scratch(ctrl_info);
 294
 295         if (is_supported)
 296                 driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 297         else
 298                 driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 299
 300         sis_write_driver_scratch(ctrl_info, driver_scratch);
 301 }
 302
 303 static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
 304 {
 305         ctrl_info->scan_blocked = true;
 306         mutex_lock(&ctrl_info->scan_mutex);
 307 }
 308
 309 static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
 310 {
 311         ctrl_info->scan_blocked = false;
 312         mutex_unlock(&ctrl_info->scan_mutex);
 313 }
 314
 315 static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
 316 {
 317         return ctrl_info->scan_blocked;
 318 }
 319
 320 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 321 {
 322         mutex_lock(&ctrl_info->lun_reset_mutex);
 323 }
 324
 325 static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
 326 {
 327         mutex_unlock(&ctrl_info->lun_reset_mutex);
 328 }
 329
 330 static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
 331 {
 332         struct Scsi_Host *shost;
 333         unsigned int num_loops;
 334         int msecs_sleep;
 335
 336         shost = ctrl_info->scsi_host;
 337
 338         scsi_block_requests(shost);
 339
 340         num_loops = 0;
 341         msecs_sleep = 20;
 342         while (scsi_host_busy(shost)) {
 343                 num_loops++;
 344                 if (num_loops == 10)
 345                         msecs_sleep = 500;
 346                 msleep(msecs_sleep);
 347         }
 348 }
 349
 350 static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 351 {
 352         scsi_unblock_requests(ctrl_info->scsi_host);
 353 }
 354
 355 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 356 {
 357         atomic_inc(&ctrl_info->num_busy_threads);
 358 }
 359
 360 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 361 {
 362         atomic_dec(&ctrl_info->num_busy_threads);
 363 }
 364
 365 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 366 {
 367         return ctrl_info->block_requests;
 368 }
 369
 370 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 371 {
 372         ctrl_info->block_requests = true;
 373 }
 374
 375 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 376 {
 377         ctrl_info->block_requests = false;
 378         wake_up_all(&ctrl_info->block_requests_wait);
 379 }
 380
 381 static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 382 {
 383         if (!pqi_ctrl_blocked(ctrl_info))
 384                 return;
 385
 386         atomic_inc(&ctrl_info->num_blocked_threads);
 387         wait_event(ctrl_info->block_requests_wait,
 388                 !pqi_ctrl_blocked(ctrl_info));
 389         atomic_dec(&ctrl_info->num_blocked_threads);
 390 }
 391
 392 #define PQI_QUIESCE_WARNING_TIMEOUT_SECS                10
 393
 394 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 395 {
 396         unsigned long start_jiffies;
 397         unsigned long warning_timeout;
 398         bool displayed_warning;
 399
 400         displayed_warning = false;
 401         start_jiffies = jiffies;
 402         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
 403
 404         while (atomic_read(&ctrl_info->num_busy_threads) >
 405                 atomic_read(&ctrl_info->num_blocked_threads)) {
 406                 if (time_after(jiffies, warning_timeout)) {
 407                         dev_warn(&ctrl_info->pci_dev->dev,
 408                                 "waiting %u seconds for driver activity to quiesce\n",
 409                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 410                         displayed_warning = true;
 411                         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + jiffies;
 412                 }
 413                 usleep_range(1000, 2000);
 414         }
 415
 416         if (displayed_warning)
 417                 dev_warn(&ctrl_info->pci_dev->dev,
 418                         "driver activity quiesced after waiting for %u seconds\n",
 419                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 420 }
 421
 422 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 423 {
 424         return device->device_offline;
 425 }
 426
 427 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 428 {
 429         mutex_lock(&ctrl_info->ofa_mutex);
 430 }
 431
 432 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 433 {
 434         mutex_unlock(&ctrl_info->ofa_mutex);
 435 }
 436
 437 static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
 438 {
 439         mutex_lock(&ctrl_info->ofa_mutex);
 440         mutex_unlock(&ctrl_info->ofa_mutex);
 441 }
 442
 443 static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
 444 {
 445         return mutex_is_locked(&ctrl_info->ofa_mutex);
 446 }
 447
 448 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 449 {
 450         device->in_remove = true;
 451 }
 452
 453 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
 454 {
 455         return device->in_remove;
 456 }
 457
 458 static inline int pqi_event_type_to_event_index(unsigned int event_type)
 459 {
 460         int index;
 461
 462         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
 463                 if (event_type == pqi_supported_event_types[index])
 464                         return index;
 465
 466         return -1;
 467 }
 468
 469 static inline bool pqi_is_supported_event(unsigned int event_type)
 470 {
 471         return pqi_event_type_to_event_index(event_type) != -1;
 472 }
 473
 474 static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
 475         unsigned long delay)
 476 {
 477         if (pqi_ctrl_offline(ctrl_info))
 478                 return;
 479
 480         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 481 }
 482
 483 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 484 {
 485         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 486 }
 487
 488 #define PQI_RESCAN_WORK_DELAY   (10 * HZ)
 489
 490 static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
 491 {
 492         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 493 }
 494
 495 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 496 {
 497         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 498 }
 499
 500 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 501 {
 502         if (!ctrl_info->heartbeat_counter)
 503                 return 0;
 504
 505         return readl(ctrl_info->heartbeat_counter);
 506 }
 507
 508 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 509 {
 510         return readb(ctrl_info->soft_reset_status);
 511 }
 512
 513 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 514 {
 515         u8 status;
 516
 517         status = pqi_read_soft_reset_status(ctrl_info);
 518         status &= ~PQI_SOFT_RESET_ABORT;
 519         writeb(status, ctrl_info->soft_reset_status);
 520 }
 521
 522 static int pqi_map_single(struct pci_dev *pci_dev,
 523         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 524         size_t buffer_length, enum dma_data_direction data_direction)
 525 {
 526         dma_addr_t bus_address;
 527
 528         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 529                 return 0;
 530
 531         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 532                 data_direction);
 533         if (dma_mapping_error(&pci_dev->dev, bus_address))
 534                 return -ENOMEM;
 535
 536         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 537         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 538         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 539
 540         return 0;
 541 }
 542
 543 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 544         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 545         enum dma_data_direction data_direction)
 546 {
 547         int i;
 548
 549         if (data_direction == DMA_NONE)
 550                 return;
 551
 552         for (i = 0; i < num_descriptors; i++)
 553                 dma_unmap_single(&pci_dev->dev,
 554                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 555                         get_unaligned_le32(&descriptors[i].length),
 556                         data_direction);
 557 }
 558
 559 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 560         struct pqi_raid_path_request *request, u8 cmd,
 561         u8 *scsi3addr, void *buffer, size_t buffer_length,
 562         u16 vpd_page, enum dma_data_direction *dir)
 563 {
 564         u8 *cdb;
 565         size_t cdb_length = buffer_length;
 566
 567         memset(request, 0, sizeof(*request));
 568
 569         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 570         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 571                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 572                 &request->header.iu_length);
 573         put_unaligned_le32(buffer_length, &request->buffer_length);
 574         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 575         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 576         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 577
 578         cdb = request->cdb;
 579
 580         switch (cmd) {
 581         case TEST_UNIT_READY:
 582                 request->data_direction = SOP_READ_FLAG;
 583                 cdb[0] = TEST_UNIT_READY;
 584                 break;
 585         case INQUIRY:
 586                 request->data_direction = SOP_READ_FLAG;
 587                 cdb[0] = INQUIRY;
 588                 if (vpd_page & VPD_PAGE) {
 589                         cdb[1] = 0x1;
 590                         cdb[2] = (u8)vpd_page;
 591                 }
 592                 cdb[4] = (u8)cdb_length;
 593                 break;
 594         case CISS_REPORT_LOG:
 595         case CISS_REPORT_PHYS:
 596                 request->data_direction = SOP_READ_FLAG;
 597                 cdb[0] = cmd;
 598                 if (cmd == CISS_REPORT_PHYS) {
 599                         if (ctrl_info->rpl_extended_format_4_5_supported)
 600                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
 601                         else
 602                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
 603                 } else {
 604                         cdb[1] = ctrl_info->ciss_report_log_flags;
 605                 }
 606                 put_unaligned_be32(cdb_length, &cdb[6]);
 607                 break;
 608         case CISS_GET_RAID_MAP:
 609                 request->data_direction = SOP_READ_FLAG;
 610                 cdb[0] = CISS_READ;
 611                 cdb[1] = CISS_GET_RAID_MAP;
 612                 put_unaligned_be32(cdb_length, &cdb[6]);
 613                 break;
 614         case SA_FLUSH_CACHE:
 615                 request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
 616                 request->data_direction = SOP_WRITE_FLAG;
 617                 cdb[0] = BMIC_WRITE;
 618                 cdb[6] = BMIC_FLUSH_CACHE;
 619                 put_unaligned_be16(cdb_length, &cdb[7]);
 620                 break;
 621         case BMIC_SENSE_DIAG_OPTIONS:
 622                 cdb_length = 0;
 623                 fallthrough;
 624         case BMIC_IDENTIFY_CONTROLLER:
 625         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 626         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 627         case BMIC_SENSE_FEATURE:
 628                 request->data_direction = SOP_READ_FLAG;
 629                 cdb[0] = BMIC_READ;
 630                 cdb[6] = cmd;
 631                 put_unaligned_be16(cdb_length, &cdb[7]);
 632                 break;
 633         case BMIC_SET_DIAG_OPTIONS:
 634                 cdb_length = 0;
 635                 fallthrough;
 636         case BMIC_WRITE_HOST_WELLNESS:
 637                 request->data_direction = SOP_WRITE_FLAG;
 638                 cdb[0] = BMIC_WRITE;
 639                 cdb[6] = cmd;
 640                 put_unaligned_be16(cdb_length, &cdb[7]);
 641                 break;
 642         case BMIC_CSMI_PASSTHRU:
 643                 request->data_direction = SOP_BIDIRECTIONAL;
 644                 cdb[0] = BMIC_WRITE;
 645                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 646                 cdb[6] = cmd;
 647                 put_unaligned_be16(cdb_length, &cdb[7]);
 648                 break;
 649         default:
 650                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
 651                 break;
 652         }
 653
 654         switch (request->data_direction) {
 655         case SOP_READ_FLAG:
 656                 *dir = DMA_FROM_DEVICE;
 657                 break;
 658         case SOP_WRITE_FLAG:
 659                 *dir = DMA_TO_DEVICE;
 660                 break;
 661         case SOP_NO_DIRECTION_FLAG:
 662                 *dir = DMA_NONE;
 663                 break;
 664         default:
 665                 *dir = DMA_BIDIRECTIONAL;
 666                 break;
 667         }
 668
 669         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 670                 buffer, buffer_length, *dir);
 671 }
 672
 673 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 674 {
 675         io_request->scmd = NULL;
 676         io_request->status = 0;
 677         io_request->error_info = NULL;
 678         io_request->raid_bypass = false;
 679 }
 680
 681 static inline struct pqi_io_request *pqi_alloc_io_request(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
 682 {
 683         struct pqi_io_request *io_request;
 684         u16 i;
 685
 686         if (scmd) { /* SML I/O request */
 687                 u32 blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
 688
 689                 i = blk_mq_unique_tag_to_tag(blk_tag);
 690                 io_request = &ctrl_info->io_request_pool[i];
 691                 if (atomic_inc_return(&io_request->refcount) > 1) {
 692                         atomic_dec(&io_request->refcount);
 693                         return NULL;
 694                 }
 695         } else { /* IOCTL or driver internal request */
 696                 /*
 697                  * benignly racy - may have to wait for an open slot.
 698                  * command slot range is scsi_ml_can_queue -
 699                  *         [scsi_ml_can_queue + (PQI_RESERVED_IO_SLOTS - 1)]
 700                  */
 701                 i = 0;
 702                 while (1) {
 703                         io_request = &ctrl_info->io_request_pool[ctrl_info->scsi_ml_can_queue + i];
 704                         if (atomic_inc_return(&io_request->refcount) == 1)
 705                                 break;
 706                         atomic_dec(&io_request->refcount);
 707                         i = (i + 1) % PQI_RESERVED_IO_SLOTS;
 708                 }
 709         }
 710
 711         pqi_reinit_io_request(io_request);
 712
 713         return io_request;
 714 }
 715
 716 static void pqi_free_io_request(struct pqi_io_request *io_request)
 717 {
 718         atomic_dec(&io_request->refcount);
 719 }
 720
 721 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 722         u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 723         struct pqi_raid_error_info *error_info)
 724 {
 725         int rc;
 726         struct pqi_raid_path_request request;
 727         enum dma_data_direction dir;
 728
 729         rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
 730                 buffer, buffer_length, vpd_page, &dir);
 731         if (rc)
 732                 return rc;
 733
 734         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
 735
 736         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 737
 738         return rc;
 739 }
 740
 741 /* helper functions for pqi_send_scsi_raid_request */
 742
 743 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 744         u8 cmd, void *buffer, size_t buffer_length)
 745 {
 746         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 747                 buffer, buffer_length, 0, NULL);
 748 }
 749
 750 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 751         u8 cmd, void *buffer, size_t buffer_length,
 752         struct pqi_raid_error_info *error_info)
 753 {
 754         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 755                 buffer, buffer_length, 0, error_info);
 756 }
 757
 758 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 759         struct bmic_identify_controller *buffer)
 760 {
 761         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 762                 buffer, sizeof(*buffer));
 763 }
 764
 765 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 766         struct bmic_sense_subsystem_info *sense_info)
 767 {
 768         return pqi_send_ctrl_raid_request(ctrl_info,
 769                 BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
 770                 sizeof(*sense_info));
 771 }
 772
 773 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 774         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 775 {
 776         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 777                 buffer, buffer_length, vpd_page, NULL);
 778 }
 779
 780 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 781         struct pqi_scsi_dev *device,
 782         struct bmic_identify_physical_device *buffer, size_t buffer_length)
 783 {
 784         int rc;
 785         enum dma_data_direction dir;
 786         u16 bmic_device_index;
 787         struct pqi_raid_path_request request;
 788
 789         rc = pqi_build_raid_path_request(ctrl_info, &request,
 790                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 791                 buffer_length, 0, &dir);
 792         if (rc)
 793                 return rc;
 794
 795         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 796         request.cdb[2] = (u8)bmic_device_index;
 797         request.cdb[9] = (u8)(bmic_device_index >> 8);
 798
 799         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 800
 801         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 802
 803         return rc;
 804 }
 805
 806 static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
 807 {
 808         u32 bytes;
 809
 810         bytes = get_unaligned_le16(limit);
 811         if (bytes == 0)
 812                 bytes = ~0;
 813         else
 814                 bytes *= 1024;
 815
 816         return bytes;
 817 }
 818
 819 #pragma pack(1)
 820
 821 struct bmic_sense_feature_buffer {
 822         struct bmic_sense_feature_buffer_header header;
 823         struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
 824 };
 825
 826 #pragma pack()
 827
 828 #define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH       \
 829         offsetofend(struct bmic_sense_feature_buffer, \
 830                 aio_subpage.max_write_raid_1_10_3drive)
 831
 832 #define MINIMUM_AIO_SUBPAGE_LENGTH      \
 833         (offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
 834                 max_write_raid_1_10_3drive) - \
 835                 sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
 836
 837 static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
 838 {
 839         int rc;
 840         enum dma_data_direction dir;
 841         struct pqi_raid_path_request request;
 842         struct bmic_sense_feature_buffer *buffer;
 843
 844         buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
 845         if (!buffer)
 846                 return -ENOMEM;
 847
 848         rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
 849                 buffer, sizeof(*buffer), 0, &dir);
 850         if (rc)
 851                 goto error;
 852
 853         request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
 854         request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
 855
 856         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 857
 858         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 859
 860         if (rc)
 861                 goto error;
 862
 863         if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
 864                 buffer->header.subpage_code !=
 865                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 866                 get_unaligned_le16(&buffer->header.buffer_length) <
 867                         MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
 868                 buffer->aio_subpage.header.page_code !=
 869                         BMIC_SENSE_FEATURE_IO_PAGE ||
 870                 buffer->aio_subpage.header.subpage_code !=
 871                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 872                 get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
 873                         MINIMUM_AIO_SUBPAGE_LENGTH) {
 874                 goto error;
 875         }
 876
 877         ctrl_info->max_transfer_encrypted_sas_sata =
 878                 pqi_aio_limit_to_bytes(
 879                         &buffer->aio_subpage.max_transfer_encrypted_sas_sata);
 880
 881         ctrl_info->max_transfer_encrypted_nvme =
 882                 pqi_aio_limit_to_bytes(
 883                         &buffer->aio_subpage.max_transfer_encrypted_nvme);
 884
 885         ctrl_info->max_write_raid_5_6 =
 886                 pqi_aio_limit_to_bytes(
 887                         &buffer->aio_subpage.max_write_raid_5_6);
 888
 889         ctrl_info->max_write_raid_1_10_2drive =
 890                 pqi_aio_limit_to_bytes(
 891                         &buffer->aio_subpage.max_write_raid_1_10_2drive);
 892
 893         ctrl_info->max_write_raid_1_10_3drive =
 894                 pqi_aio_limit_to_bytes(
 895                         &buffer->aio_subpage.max_write_raid_1_10_3drive);
 896
 897 error:
 898         kfree(buffer);
 899
 900         return rc;
 901 }
 902
 903 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 904         enum bmic_flush_cache_shutdown_event shutdown_event)
 905 {
 906         int rc;
 907         struct bmic_flush_cache *flush_cache;
 908
 909         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 910         if (!flush_cache)
 911                 return -ENOMEM;
 912
 913         flush_cache->shutdown_event = shutdown_event;
 914
 915         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 916                 sizeof(*flush_cache));
 917
 918         kfree(flush_cache);
 919
 920         return rc;
 921 }
 922
 923 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 924         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 925         struct pqi_raid_error_info *error_info)
 926 {
 927         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 928                 buffer, buffer_length, error_info);
 929 }
 930
 931 #define PQI_FETCH_PTRAID_DATA           (1 << 31)
 932
 933 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 934 {
 935         int rc;
 936         struct bmic_diag_options *diag;
 937
 938         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 939         if (!diag)
 940                 return -ENOMEM;
 941
 942         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 943                 diag, sizeof(*diag));
 944         if (rc)
 945                 goto out;
 946
 947         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 948
 949         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
 950                 sizeof(*diag));
 951
 952 out:
 953         kfree(diag);
 954
 955         return rc;
 956 }
 957
 958 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 959         void *buffer, size_t buffer_length)
 960 {
 961         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 962                 buffer, buffer_length);
 963 }
 964
 965 #pragma pack(1)
 966
 967 struct bmic_host_wellness_driver_version {
 968         u8      start_tag[4];
 969         u8      driver_version_tag[2];
 970         __le16  driver_version_length;
 971         char    driver_version[32];
 972         u8      dont_write_tag[2];
 973         u8      end_tag[2];
 974 };
 975
 976 #pragma pack()
 977
 978 static int pqi_write_driver_version_to_host_wellness(
 979         struct pqi_ctrl_info *ctrl_info)
 980 {
 981         int rc;
 982         struct bmic_host_wellness_driver_version *buffer;
 983         size_t buffer_length;
 984
 985         buffer_length = sizeof(*buffer);
 986
 987         buffer = kmalloc(buffer_length, GFP_KERNEL);
 988         if (!buffer)
 989                 return -ENOMEM;
 990
 991         buffer->start_tag[0] = '<';
 992         buffer->start_tag[1] = 'H';
 993         buffer->start_tag[2] = 'W';
 994         buffer->start_tag[3] = '>';
 995         buffer->driver_version_tag[0] = 'D';
 996         buffer->driver_version_tag[1] = 'V';
 997         put_unaligned_le16(sizeof(buffer->driver_version),
 998                 &buffer->driver_version_length);
 999         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
1000                 sizeof(buffer->driver_version) - 1);
1001         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
1002         buffer->dont_write_tag[0] = 'D';
1003         buffer->dont_write_tag[1] = 'W';
1004         buffer->end_tag[0] = 'Z';
1005         buffer->end_tag[1] = 'Z';
1006
1007         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1008
1009         kfree(buffer);
1010
1011         return rc;
1012 }
1013
1014 #pragma pack(1)
1015
1016 struct bmic_host_wellness_time {
1017         u8      start_tag[4];
1018         u8      time_tag[2];
1019         __le16  time_length;
1020         u8      time[8];
1021         u8      dont_write_tag[2];
1022         u8      end_tag[2];
1023 };
1024
1025 #pragma pack()
1026
1027 static int pqi_write_current_time_to_host_wellness(
1028         struct pqi_ctrl_info *ctrl_info)
1029 {
1030         int rc;
1031         struct bmic_host_wellness_time *buffer;
1032         size_t buffer_length;
1033         time64_t local_time;
1034         unsigned int year;
1035         struct tm tm;
1036
1037         buffer_length = sizeof(*buffer);
1038
1039         buffer = kmalloc(buffer_length, GFP_KERNEL);
1040         if (!buffer)
1041                 return -ENOMEM;
1042
1043         buffer->start_tag[0] = '<';
1044         buffer->start_tag[1] = 'H';
1045         buffer->start_tag[2] = 'W';
1046         buffer->start_tag[3] = '>';
1047         buffer->time_tag[0] = 'T';
1048         buffer->time_tag[1] = 'D';
1049         put_unaligned_le16(sizeof(buffer->time),
1050                 &buffer->time_length);
1051
1052         local_time = ktime_get_real_seconds();
1053         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
1054         year = tm.tm_year + 1900;
1055
1056         buffer->time[0] = bin2bcd(tm.tm_hour);
1057         buffer->time[1] = bin2bcd(tm.tm_min);
1058         buffer->time[2] = bin2bcd(tm.tm_sec);
1059         buffer->time[3] = 0;
1060         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
1061         buffer->time[5] = bin2bcd(tm.tm_mday);
1062         buffer->time[6] = bin2bcd(year / 100);
1063         buffer->time[7] = bin2bcd(year % 100);
1064
1065         buffer->dont_write_tag[0] = 'D';
1066         buffer->dont_write_tag[1] = 'W';
1067         buffer->end_tag[0] = 'Z';
1068         buffer->end_tag[1] = 'Z';
1069
1070         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1071
1072         kfree(buffer);
1073
1074         return rc;
1075 }
1076
1077 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
1078
1079 static void pqi_update_time_worker(struct work_struct *work)
1080 {
1081         int rc;
1082         struct pqi_ctrl_info *ctrl_info;
1083
1084         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1085                 update_time_work);
1086
1087         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
1088         if (rc)
1089                 dev_warn(&ctrl_info->pci_dev->dev,
1090                         "error updating time on controller\n");
1091
1092         schedule_delayed_work(&ctrl_info->update_time_work,
1093                 PQI_UPDATE_TIME_WORK_INTERVAL);
1094 }
1095
1096 static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1097 {
1098         schedule_delayed_work(&ctrl_info->update_time_work, 0);
1099 }
1100
1101 static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1102 {
1103         cancel_delayed_work_sync(&ctrl_info->update_time_work);
1104 }
1105
1106 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
1107         size_t buffer_length)
1108 {
1109         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
1110 }
1111
1112 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
1113 {
1114         int rc;
1115         size_t lun_list_length;
1116         size_t lun_data_length;
1117         size_t new_lun_list_length;
1118         void *lun_data = NULL;
1119         struct report_lun_header *report_lun_header;
1120
1121         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
1122         if (!report_lun_header) {
1123                 rc = -ENOMEM;
1124                 goto out;
1125         }
1126
1127         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
1128         if (rc)
1129                 goto out;
1130
1131         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
1132
1133 again:
1134         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
1135
1136         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
1137         if (!lun_data) {
1138                 rc = -ENOMEM;
1139                 goto out;
1140         }
1141
1142         if (lun_list_length == 0) {
1143                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
1144                 goto out;
1145         }
1146
1147         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
1148         if (rc)
1149                 goto out;
1150
1151         new_lun_list_length =
1152                 get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
1153
1154         if (new_lun_list_length > lun_list_length) {
1155                 lun_list_length = new_lun_list_length;
1156                 kfree(lun_data);
1157                 goto again;
1158         }
1159
1160 out:
1161         kfree(report_lun_header);
1162
1163         if (rc) {
1164                 kfree(lun_data);
1165                 lun_data = NULL;
1166         }
1167
1168         *buffer = lun_data;
1169
1170         return rc;
1171 }
1172
1173 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1174 {
1175         int rc;
1176         unsigned int i;
1177         u8 rpl_response_format;
1178         u32 num_physicals;
1179         size_t rpl_16byte_wwid_list_length;
1180         void *rpl_list;
1181         struct report_lun_header *rpl_header;
1182         struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
1183         struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
1184
1185         rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
1186         if (rc)
1187                 return rc;
1188
1189         if (ctrl_info->rpl_extended_format_4_5_supported) {
1190                 rpl_header = rpl_list;
1191                 rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
1192                 if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
1193                         *buffer = rpl_list;
1194                         return 0;
1195                 } else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
1196                         dev_err(&ctrl_info->pci_dev->dev,
1197                                 "RPL returned unsupported data format %u\n",
1198                                 rpl_response_format);
1199                         return -EINVAL;
1200                 } else {
1201                         dev_warn(&ctrl_info->pci_dev->dev,
1202                                 "RPL returned extended format 2 instead of 4\n");
1203                 }
1204         }
1205
1206         rpl_8byte_wwid_list = rpl_list;
1207         num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
1208         rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid));
1209
1210         rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL);
1211         if (!rpl_16byte_wwid_list)
1212                 return -ENOMEM;
1213
1214         put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
1215                 &rpl_16byte_wwid_list->header.list_length);
1216         rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
1217
1218         for (i = 0; i < num_physicals; i++) {
1219                 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));
1220                 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));
1221                 memset(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], 0, 8);
1222                 rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
1223                 rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
1224                 rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
1225                 rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
1226                 rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
1227         }
1228
1229         kfree(rpl_8byte_wwid_list);
1230         *buffer = rpl_16byte_wwid_list;
1231
1232         return 0;
1233 }
1234
1235 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1236 {
1237         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1238 }
1239
1240 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1241         struct report_phys_lun_16byte_wwid_list **physdev_list,
1242         struct report_log_lun_list **logdev_list)
1243 {
1244         int rc;
1245         size_t logdev_list_length;
1246         size_t logdev_data_length;
1247         struct report_log_lun_list *internal_logdev_list;
1248         struct report_log_lun_list *logdev_data;
1249         struct report_lun_header report_lun_header;
1250
1251         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1252         if (rc)
1253                 dev_err(&ctrl_info->pci_dev->dev,
1254                         "report physical LUNs failed\n");
1255
1256         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1257         if (rc)
1258                 dev_err(&ctrl_info->pci_dev->dev,
1259                         "report logical LUNs failed\n");
1260
1261         /*
1262          * Tack the controller itself onto the end of the logical device list
1263          * by adding a list entry that is all zeros.
1264          */
1265
1266         logdev_data = *logdev_list;
1267
1268         if (logdev_data) {
1269                 logdev_list_length =
1270                         get_unaligned_be32(&logdev_data->header.list_length);
1271         } else {
1272                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1273                 logdev_data =
1274                         (struct report_log_lun_list *)&report_lun_header;
1275                 logdev_list_length = 0;
1276         }
1277
1278         logdev_data_length = sizeof(struct report_lun_header) +
1279                 logdev_list_length;
1280
1281         internal_logdev_list = kmalloc(logdev_data_length +
1282                 sizeof(struct report_log_lun), GFP_KERNEL);
1283         if (!internal_logdev_list) {
1284                 kfree(*logdev_list);
1285                 *logdev_list = NULL;
1286                 return -ENOMEM;
1287         }
1288
1289         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1290         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1291                 sizeof(struct report_log_lun));
1292         put_unaligned_be32(logdev_list_length +
1293                 sizeof(struct report_log_lun),
1294                 &internal_logdev_list->header.list_length);
1295
1296         kfree(*logdev_list);
1297         *logdev_list = internal_logdev_list;
1298
1299         return 0;
1300 }
1301
1302 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1303         int bus, int target, int lun)
1304 {
1305         device->bus = bus;
1306         device->target = target;
1307         device->lun = lun;
1308 }
1309
1310 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1311 {
1312         u8 *scsi3addr;
1313         u32 lunid;
1314         int bus;
1315         int target;
1316         int lun;
1317
1318         scsi3addr = device->scsi3addr;
1319         lunid = get_unaligned_le32(scsi3addr);
1320
1321         if (pqi_is_hba_lunid(scsi3addr)) {
1322                 /* The specified device is the controller. */
1323                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1324                 device->target_lun_valid = true;
1325                 return;
1326         }
1327
1328         if (pqi_is_logical_device(device)) {
1329                 if (device->is_external_raid_device) {
1330                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1331                         target = (lunid >> 16) & 0x3fff;
1332                         lun = lunid & 0xff;
1333                 } else {
1334                         bus = PQI_RAID_VOLUME_BUS;
1335                         target = 0;
1336                         lun = lunid & 0x3fff;
1337                 }
1338                 pqi_set_bus_target_lun(device, bus, target, lun);
1339                 device->target_lun_valid = true;
1340                 return;
1341         }
1342
1343         /*
1344          * Defer target and LUN assignment for non-controller physical devices
1345          * because the SAS transport layer will make these assignments later.
1346          */
1347         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1348 }
1349
1350 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1351         struct pqi_scsi_dev *device)
1352 {
1353         int rc;
1354         u8 raid_level;
1355         u8 *buffer;
1356
1357         raid_level = SA_RAID_UNKNOWN;
1358
1359         buffer = kmalloc(64, GFP_KERNEL);
1360         if (buffer) {
1361                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1362                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1363                 if (rc == 0) {
1364                         raid_level = buffer[8];
1365                         if (raid_level > SA_RAID_MAX)
1366                                 raid_level = SA_RAID_UNKNOWN;
1367                 }
1368                 kfree(buffer);
1369         }
1370
1371         device->raid_level = raid_level;
1372 }
1373
1374 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1375         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1376 {
1377         char *err_msg;
1378         u32 raid_map_size;
1379         u32 r5or6_blocks_per_row;
1380
1381         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1382
1383         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1384                 err_msg = "RAID map too small";
1385                 goto bad_raid_map;
1386         }
1387
1388         if (device->raid_level == SA_RAID_1) {
1389                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1390                         err_msg = "invalid RAID-1 map";
1391                         goto bad_raid_map;
1392                 }
1393         } else if (device->raid_level == SA_RAID_TRIPLE) {
1394                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1395                         err_msg = "invalid RAID-1(Triple) map";
1396                         goto bad_raid_map;
1397                 }
1398         } else if ((device->raid_level == SA_RAID_5 ||
1399                 device->raid_level == SA_RAID_6) &&
1400                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1401                 /* RAID 50/60 */
1402                 r5or6_blocks_per_row =
1403                         get_unaligned_le16(&raid_map->strip_size) *
1404                         get_unaligned_le16(&raid_map->data_disks_per_row);
1405                 if (r5or6_blocks_per_row == 0) {
1406                         err_msg = "invalid RAID-5 or RAID-6 map";
1407                         goto bad_raid_map;
1408                 }
1409         }
1410
1411         return 0;
1412
1413 bad_raid_map:
1414         dev_warn(&ctrl_info->pci_dev->dev,
1415                 "logical device %08x%08x %s\n",
1416                 *((u32 *)&device->scsi3addr),
1417                 *((u32 *)&device->scsi3addr[4]), err_msg);
1418
1419         return -EINVAL;
1420 }
1421
1422 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1423         struct pqi_scsi_dev *device)
1424 {
1425         int rc;
1426         u32 raid_map_size;
1427         struct raid_map *raid_map;
1428
1429         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1430         if (!raid_map)
1431                 return -ENOMEM;
1432
1433         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1434                 device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
1435         if (rc)
1436                 goto error;
1437
1438         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1439
1440         if (raid_map_size > sizeof(*raid_map)) {
1441
1442                 kfree(raid_map);
1443
1444                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1445                 if (!raid_map)
1446                         return -ENOMEM;
1447
1448                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1449                         device->scsi3addr, raid_map, raid_map_size, 0, NULL);
1450                 if (rc)
1451                         goto error;
1452
1453                 if (get_unaligned_le32(&raid_map->structure_size)
1454                         != raid_map_size) {
1455                         dev_warn(&ctrl_info->pci_dev->dev,
1456                                 "requested %u bytes, received %u bytes\n",
1457                                 raid_map_size,
1458                                 get_unaligned_le32(&raid_map->structure_size));
1459                         rc = -EINVAL;
1460                         goto error;
1461                 }
1462         }
1463
1464         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1465         if (rc)
1466                 goto error;
1467
1468         device->raid_map = raid_map;
1469
1470         return 0;
1471
1472 error:
1473         kfree(raid_map);
1474
1475         return rc;
1476 }
1477
1478 static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
1479         struct pqi_scsi_dev *device)
1480 {
1481         if (!ctrl_info->lv_drive_type_mix_valid) {
1482                 device->max_transfer_encrypted = ~0;
1483                 return;
1484         }
1485
1486         switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
1487         case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
1488         case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
1489         case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
1490         case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
1491         case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
1492         case LV_DRIVE_TYPE_MIX_SAS_ONLY:
1493         case LV_DRIVE_TYPE_MIX_SATA_ONLY:
1494                 device->max_transfer_encrypted =
1495                         ctrl_info->max_transfer_encrypted_sas_sata;
1496                 break;
1497         case LV_DRIVE_TYPE_MIX_NVME_ONLY:
1498                 device->max_transfer_encrypted =
1499                         ctrl_info->max_transfer_encrypted_nvme;
1500                 break;
1501         case LV_DRIVE_TYPE_MIX_UNKNOWN:
1502         case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
1503         default:
1504                 device->max_transfer_encrypted =
1505                         min(ctrl_info->max_transfer_encrypted_sas_sata,
1506                                 ctrl_info->max_transfer_encrypted_nvme);
1507                 break;
1508         }
1509 }
1510
1511 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1512         struct pqi_scsi_dev *device)
1513 {
1514         int rc;
1515         u8 *buffer;
1516         u8 bypass_status;
1517
1518         buffer = kmalloc(64, GFP_KERNEL);
1519         if (!buffer)
1520                 return;
1521
1522         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1523                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1524         if (rc)
1525                 goto out;
1526
1527 #define RAID_BYPASS_STATUS              4
1528 #define RAID_BYPASS_CONFIGURED          0x1
1529 #define RAID_BYPASS_ENABLED             0x2
1530
1531         bypass_status = buffer[RAID_BYPASS_STATUS];
1532         device->raid_bypass_configured =
1533                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1534         if (device->raid_bypass_configured &&
1535                 (bypass_status & RAID_BYPASS_ENABLED) &&
1536                 pqi_get_raid_map(ctrl_info, device) == 0) {
1537                 device->raid_bypass_enabled = true;
1538                 if (get_unaligned_le16(&device->raid_map->flags) &
1539                         RAID_MAP_ENCRYPTION_ENABLED)
1540                         pqi_set_max_transfer_encrypted(ctrl_info, device);
1541         }
1542
1543 out:
1544         kfree(buffer);
1545 }
1546
1547 /*
1548  * Use vendor-specific VPD to determine online/offline status of a volume.
1549  */
1550
1551 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1552         struct pqi_scsi_dev *device)
1553 {
1554         int rc;
1555         size_t page_length;
1556         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1557         bool volume_offline = true;
1558         u32 volume_flags;
1559         struct ciss_vpd_logical_volume_status *vpd;
1560
1561         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1562         if (!vpd)
1563                 goto no_buffer;
1564
1565         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1566                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1567         if (rc)
1568                 goto out;
1569
1570         if (vpd->page_code != CISS_VPD_LV_STATUS)
1571                 goto out;
1572
1573         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1574                 volume_status) + vpd->page_length;
1575         if (page_length < sizeof(*vpd))
1576                 goto out;
1577
1578         volume_status = vpd->volume_status;
1579         volume_flags = get_unaligned_be32(&vpd->flags);
1580         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1581
1582 out:
1583         kfree(vpd);
1584 no_buffer:
1585         device->volume_status = volume_status;
1586         device->volume_offline = volume_offline;
1587 }
1588
1589 #define PQI_DEVICE_NCQ_PRIO_SUPPORTED   0x01
1590 #define PQI_DEVICE_PHY_MAP_SUPPORTED    0x10
1591
1592 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1593         struct pqi_scsi_dev *device,
1594         struct bmic_identify_physical_device *id_phys)
1595 {
1596         int rc;
1597
1598         memset(id_phys, 0, sizeof(*id_phys));
1599
1600         rc = pqi_identify_physical_device(ctrl_info, device,
1601                 id_phys, sizeof(*id_phys));
1602         if (rc) {
1603                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1604                 return rc;
1605         }
1606
1607         scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1608         scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1609
1610         memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1611         memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1612
1613         device->box_index = id_phys->box_index;
1614         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1615         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1616         device->queue_depth =
1617                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1618         device->active_path_index = id_phys->active_path_number;
1619         device->path_map = id_phys->redundant_path_present_map;
1620         memcpy(&device->box,
1621                 &id_phys->alternate_paths_phys_box_on_port,
1622                 sizeof(device->box));
1623         memcpy(&device->phys_connector,
1624                 &id_phys->alternate_paths_phys_connector,
1625                 sizeof(device->phys_connector));
1626         device->bay = id_phys->phys_bay_in_box;
1627         device->lun_count = id_phys->multi_lun_device_lun_count;
1628         if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
1629                 id_phys->phy_count)
1630                 device->phy_id =
1631                         id_phys->phy_to_phy_map[device->active_path_index];
1632         else
1633                 device->phy_id = 0xFF;
1634
1635         device->ncq_prio_support =
1636                 ((get_unaligned_le32(&id_phys->misc_drive_flags) >> 16) &
1637                 PQI_DEVICE_NCQ_PRIO_SUPPORTED);
1638
1639         return 0;
1640 }
1641
1642 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1643         struct pqi_scsi_dev *device)
1644 {
1645         int rc;
1646         u8 *buffer;
1647
1648         buffer = kmalloc(64, GFP_KERNEL);
1649         if (!buffer)
1650                 return -ENOMEM;
1651
1652         /* Send an inquiry to the device to see what it is. */
1653         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1654         if (rc)
1655                 goto out;
1656
1657         scsi_sanitize_inquiry_string(&buffer[8], 8);
1658         scsi_sanitize_inquiry_string(&buffer[16], 16);
1659
1660         device->devtype = buffer[0] & 0x1f;
1661         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1662         memcpy(device->model, &buffer[16], sizeof(device->model));
1663
1664         if (device->devtype == TYPE_DISK) {
1665                 if (device->is_external_raid_device) {
1666                         device->raid_level = SA_RAID_UNKNOWN;
1667                         device->volume_status = CISS_LV_OK;
1668                         device->volume_offline = false;
1669                 } else {
1670                         pqi_get_raid_level(ctrl_info, device);
1671                         pqi_get_raid_bypass_status(ctrl_info, device);
1672                         pqi_get_volume_status(ctrl_info, device);
1673                 }
1674         }
1675
1676 out:
1677         kfree(buffer);
1678
1679         return rc;
1680 }
1681
1682 /*
1683  * Prevent adding drive to OS for some corner cases such as a drive
1684  * undergoing a sanitize operation. Some OSes will continue to poll
1685  * the drive until the sanitize completes, which can take hours,
1686  * resulting in long bootup delays. Commands such as TUR, READ_CAP
1687  * are allowed, but READ/WRITE cause check condition. So the OS
1688  * cannot check/read the partition table.
1689  * Note: devices that have completed sanitize must be re-enabled
1690  *       using the management utility.
1691  */
1692 static bool pqi_keep_device_offline(struct pqi_ctrl_info *ctrl_info,
1693         struct pqi_scsi_dev *device)
1694 {
1695         u8 scsi_status;
1696         int rc;
1697         enum dma_data_direction dir;
1698         char *buffer;
1699         int buffer_length = 64;
1700         size_t sense_data_length;
1701         struct scsi_sense_hdr sshdr;
1702         struct pqi_raid_path_request request;
1703         struct pqi_raid_error_info error_info;
1704         bool offline = false; /* Assume keep online */
1705
1706         /* Do not check controllers. */
1707         if (pqi_is_hba_lunid(device->scsi3addr))
1708                 return false;
1709
1710         /* Do not check LVs. */
1711         if (pqi_is_logical_device(device))
1712                 return false;
1713
1714         buffer = kmalloc(buffer_length, GFP_KERNEL);
1715         if (!buffer)
1716                 return false; /* Assume not offline */
1717
1718         /* Check for SANITIZE in progress using TUR */
1719         rc = pqi_build_raid_path_request(ctrl_info, &request,
1720                 TEST_UNIT_READY, RAID_CTLR_LUNID, buffer,
1721                 buffer_length, 0, &dir);
1722         if (rc)
1723                 goto out; /* Assume not offline */
1724
1725         memcpy(request.lun_number, device->scsi3addr, sizeof(request.lun_number));
1726
1727         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, &error_info);
1728
1729         if (rc)
1730                 goto out; /* Assume not offline */
1731
1732         scsi_status = error_info.status;
1733         sense_data_length = get_unaligned_le16(&error_info.sense_data_length);
1734         if (sense_data_length == 0)
1735                 sense_data_length =
1736                         get_unaligned_le16(&error_info.response_data_length);
1737         if (sense_data_length) {
1738                 if (sense_data_length > sizeof(error_info.data))
1739                         sense_data_length = sizeof(error_info.data);
1740
1741                 /*
1742                  * Check for sanitize in progress: asc:0x04, ascq: 0x1b
1743                  */
1744                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
1745                         scsi_normalize_sense(error_info.data,
1746                                 sense_data_length, &sshdr) &&
1747                                 sshdr.sense_key == NOT_READY &&
1748                                 sshdr.asc == 0x04 &&
1749                                 sshdr.ascq == 0x1b) {
1750                         device->device_offline = true;
1751                         offline = true;
1752                         goto out; /* Keep device offline */
1753                 }
1754         }
1755
1756 out:
1757         kfree(buffer);
1758         return offline;
1759 }
1760
1761 static int pqi_get_device_info_phys_logical(struct pqi_ctrl_info *ctrl_info,
1762         struct pqi_scsi_dev *device,
1763         struct bmic_identify_physical_device *id_phys)
1764 {
1765         int rc;
1766
1767         if (device->is_expander_smp_device)
1768                 return 0;
1769
1770         if (pqi_is_logical_device(device))
1771                 rc = pqi_get_logical_device_info(ctrl_info, device);
1772         else
1773                 rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1774
1775         return rc;
1776 }
1777
1778 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1779         struct pqi_scsi_dev *device,
1780         struct bmic_identify_physical_device *id_phys)
1781 {
1782         int rc;
1783
1784         rc = pqi_get_device_info_phys_logical(ctrl_info, device, id_phys);
1785
1786         if (rc == 0 && device->lun_count == 0)
1787                 device->lun_count = 1;
1788
1789         return rc;
1790 }
1791
1792 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1793         struct pqi_scsi_dev *device)
1794 {
1795         char *status;
1796         static const char unknown_state_str[] =
1797                 "Volume is in an unknown state (%u)";
1798         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1799
1800         switch (device->volume_status) {
1801         case CISS_LV_OK:
1802                 status = "Volume online";
1803                 break;
1804         case CISS_LV_FAILED:
1805                 status = "Volume failed";
1806                 break;
1807         case CISS_LV_NOT_CONFIGURED:
1808                 status = "Volume not configured";
1809                 break;
1810         case CISS_LV_DEGRADED:
1811                 status = "Volume degraded";
1812                 break;
1813         case CISS_LV_READY_FOR_RECOVERY:
1814                 status = "Volume ready for recovery operation";
1815                 break;
1816         case CISS_LV_UNDERGOING_RECOVERY:
1817                 status = "Volume undergoing recovery";
1818                 break;
1819         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1820                 status = "Wrong physical drive was replaced";
1821                 break;
1822         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1823                 status = "A physical drive not properly connected";
1824                 break;
1825         case CISS_LV_HARDWARE_OVERHEATING:
1826                 status = "Hardware is overheating";
1827                 break;
1828         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1829                 status = "Hardware has overheated";
1830                 break;
1831         case CISS_LV_UNDERGOING_EXPANSION:
1832                 status = "Volume undergoing expansion";
1833                 break;
1834         case CISS_LV_NOT_AVAILABLE:
1835                 status = "Volume waiting for transforming volume";
1836                 break;
1837         case CISS_LV_QUEUED_FOR_EXPANSION:
1838                 status = "Volume queued for expansion";
1839                 break;
1840         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1841                 status = "Volume disabled due to SCSI ID conflict";
1842                 break;
1843         case CISS_LV_EJECTED:
1844                 status = "Volume has been ejected";
1845                 break;
1846         case CISS_LV_UNDERGOING_ERASE:
1847                 status = "Volume undergoing background erase";
1848                 break;
1849         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1850                 status = "Volume ready for predictive spare rebuild";
1851                 break;
1852         case CISS_LV_UNDERGOING_RPI:
1853                 status = "Volume undergoing rapid parity initialization";
1854                 break;
1855         case CISS_LV_PENDING_RPI:
1856                 status = "Volume queued for rapid parity initialization";
1857                 break;
1858         case CISS_LV_ENCRYPTED_NO_KEY:
1859                 status = "Encrypted volume inaccessible - key not present";
1860                 break;
1861         case CISS_LV_UNDERGOING_ENCRYPTION:
1862                 status = "Volume undergoing encryption process";
1863                 break;
1864         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1865                 status = "Volume undergoing encryption re-keying process";
1866                 break;
1867         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1868                 status = "Volume encrypted but encryption is disabled";
1869                 break;
1870         case CISS_LV_PENDING_ENCRYPTION:
1871                 status = "Volume pending migration to encrypted state";
1872                 break;
1873         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1874                 status = "Volume pending encryption rekeying";
1875                 break;
1876         case CISS_LV_NOT_SUPPORTED:
1877                 status = "Volume not supported on this controller";
1878                 break;
1879         case CISS_LV_STATUS_UNAVAILABLE:
1880                 status = "Volume status not available";
1881                 break;
1882         default:
1883                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1884                         unknown_state_str, device->volume_status);
1885                 status = unknown_state_buffer;
1886                 break;
1887         }
1888
1889         dev_info(&ctrl_info->pci_dev->dev,
1890                 "scsi %d:%d:%d:%d %s\n",
1891                 ctrl_info->scsi_host->host_no,
1892                 device->bus, device->target, device->lun, status);
1893 }
1894
1895 static void pqi_rescan_worker(struct work_struct *work)
1896 {
1897         struct pqi_ctrl_info *ctrl_info;
1898
1899         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1900                 rescan_work);
1901
1902         pqi_scan_scsi_devices(ctrl_info);
1903 }
1904
1905 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1906         struct pqi_scsi_dev *device)
1907 {
1908         int rc;
1909
1910         if (pqi_is_logical_device(device))
1911                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1912                         device->target, device->lun);
1913         else
1914                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1915
1916         return rc;
1917 }
1918
1919 #define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS      (20 * 1000)
1920
1921 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
1922 {
1923         int rc;
1924         int lun;
1925
1926         for (lun = 0; lun < device->lun_count; lun++) {
1927                 rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun,
1928                         PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
1929                 if (rc)
1930                         dev_err(&ctrl_info->pci_dev->dev,
1931                                 "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1932                                 ctrl_info->scsi_host->host_no, device->bus,
1933                                 device->target, lun,
1934                                 atomic_read(&device->scsi_cmds_outstanding[lun]));
1935         }
1936
1937         if (pqi_is_logical_device(device))
1938                 scsi_remove_device(device->sdev);
1939         else
1940                 pqi_remove_sas_device(device);
1941
1942         pqi_device_remove_start(device);
1943 }
1944
1945 /* Assumes the SCSI device list lock is held. */
1946
1947 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1948         int bus, int target, int lun)
1949 {
1950         struct pqi_scsi_dev *device;
1951
1952         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1953                 if (device->bus == bus && device->target == target && device->lun == lun)
1954                         return device;
1955
1956         return NULL;
1957 }
1958
1959 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
1960 {
1961         if (dev1->is_physical_device != dev2->is_physical_device)
1962                 return false;
1963
1964         if (dev1->is_physical_device)
1965                 return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
1966
1967         return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
1968 }
1969
1970 enum pqi_find_result {
1971         DEVICE_NOT_FOUND,
1972         DEVICE_CHANGED,
1973         DEVICE_SAME,
1974 };
1975
1976 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1977         struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1978 {
1979         struct pqi_scsi_dev *device;
1980
1981         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1982                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1983                         *matching_device = device;
1984                         if (pqi_device_equal(device_to_find, device)) {
1985                                 if (device_to_find->volume_offline)
1986                                         return DEVICE_CHANGED;
1987                                 return DEVICE_SAME;
1988                         }
1989                         return DEVICE_CHANGED;
1990                 }
1991         }
1992
1993         return DEVICE_NOT_FOUND;
1994 }
1995
1996 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1997 {
1998         if (device->is_expander_smp_device)
1999                 return "Enclosure SMP    ";
2000
2001         return scsi_device_type(device->devtype);
2002 }
2003
2004 #define PQI_DEV_INFO_BUFFER_LENGTH      128
2005
2006 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
2007         char *action, struct pqi_scsi_dev *device)
2008 {
2009         ssize_t count;
2010         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
2011
2012         count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
2013                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
2014
2015         if (device->target_lun_valid)
2016                 count += scnprintf(buffer + count,
2017                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2018                         "%d:%d",
2019                         device->target,
2020                         device->lun);
2021         else
2022                 count += scnprintf(buffer + count,
2023                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2024                         "-:-");
2025
2026         if (pqi_is_logical_device(device))
2027                 count += scnprintf(buffer + count,
2028                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2029                         " %08x%08x",
2030                         *((u32 *)&device->scsi3addr),
2031                         *((u32 *)&device->scsi3addr[4]));
2032         else
2033                 count += scnprintf(buffer + count,
2034                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2035                         " %016llx%016llx",
2036                         get_unaligned_be64(&device->wwid[0]),
2037                         get_unaligned_be64(&device->wwid[8]));
2038
2039         count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
2040                 " %s %.8s %.16s ",
2041                 pqi_device_type(device),
2042                 device->vendor,
2043                 device->model);
2044
2045         if (pqi_is_logical_device(device)) {
2046                 if (device->devtype == TYPE_DISK)
2047                         count += scnprintf(buffer + count,
2048                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2049                                 "SSDSmartPathCap%c En%c %-12s",
2050                                 device->raid_bypass_configured ? '+' : '-',
2051                                 device->raid_bypass_enabled ? '+' : '-',
2052                                 pqi_raid_level_to_string(device->raid_level));
2053         } else {
2054                 count += scnprintf(buffer + count,
2055                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2056                         "AIO%c", device->aio_enabled ? '+' : '-');
2057                 if (device->devtype == TYPE_DISK ||
2058                         device->devtype == TYPE_ZBC)
2059                         count += scnprintf(buffer + count,
2060                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2061                                 " qd=%-6d", device->queue_depth);
2062         }
2063
2064         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
2065 }
2066
2067 static bool pqi_raid_maps_equal(struct raid_map *raid_map1, struct raid_map *raid_map2)
2068 {
2069         u32 raid_map1_size;
2070         u32 raid_map2_size;
2071
2072         if (raid_map1 == NULL || raid_map2 == NULL)
2073                 return raid_map1 == raid_map2;
2074
2075         raid_map1_size = get_unaligned_le32(&raid_map1->structure_size);
2076         raid_map2_size = get_unaligned_le32(&raid_map2->structure_size);
2077
2078         if (raid_map1_size != raid_map2_size)
2079                 return false;
2080
2081         return memcmp(raid_map1, raid_map2, raid_map1_size) == 0;
2082 }
2083
2084 /* Assumes the SCSI device list lock is held. */
2085
2086 static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info,
2087         struct pqi_scsi_dev *existing_device, struct pqi_scsi_dev *new_device)
2088 {
2089         existing_device->device_type = new_device->device_type;
2090         existing_device->bus = new_device->bus;
2091         if (new_device->target_lun_valid) {
2092                 existing_device->target = new_device->target;
2093                 existing_device->lun = new_device->lun;
2094                 existing_device->target_lun_valid = true;
2095         }
2096
2097         /* By definition, the scsi3addr and wwid fields are already the same. */
2098
2099         existing_device->is_physical_device = new_device->is_physical_device;
2100         memcpy(existing_device->vendor, new_device->vendor, sizeof(existing_device->vendor));
2101         memcpy(existing_device->model, new_device->model, sizeof(existing_device->model));
2102         existing_device->sas_address = new_device->sas_address;
2103         existing_device->queue_depth = new_device->queue_depth;
2104         existing_device->device_offline = false;
2105         existing_device->lun_count = new_device->lun_count;
2106
2107         if (pqi_is_logical_device(existing_device)) {
2108                 existing_device->is_external_raid_device = new_device->is_external_raid_device;
2109
2110                 if (existing_device->devtype == TYPE_DISK) {
2111                         existing_device->raid_level = new_device->raid_level;
2112                         existing_device->volume_status = new_device->volume_status;
2113                         if (ctrl_info->logical_volume_rescan_needed)
2114                                 existing_device->rescan = true;
2115                         memset(existing_device->next_bypass_group, 0, sizeof(existing_device->next_bypass_group));
2116                         if (!pqi_raid_maps_equal(existing_device->raid_map, new_device->raid_map)) {
2117                                 kfree(existing_device->raid_map);
2118                                 existing_device->raid_map = new_device->raid_map;
2119                                 /* To prevent this from being freed later. */
2120                                 new_device->raid_map = NULL;
2121                         }
2122                         existing_device->raid_bypass_configured = new_device->raid_bypass_configured;
2123                         existing_device->raid_bypass_enabled = new_device->raid_bypass_enabled;
2124                 }
2125         } else {
2126                 existing_device->aio_enabled = new_device->aio_enabled;
2127                 existing_device->aio_handle = new_device->aio_handle;
2128                 existing_device->is_expander_smp_device = new_device->is_expander_smp_device;
2129                 existing_device->active_path_index = new_device->active_path_index;
2130                 existing_device->phy_id = new_device->phy_id;
2131                 existing_device->path_map = new_device->path_map;
2132                 existing_device->bay = new_device->bay;
2133                 existing_device->box_index = new_device->box_index;
2134                 existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
2135                 existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
2136                 memcpy(existing_device->box, new_device->box, sizeof(existing_device->box));
2137                 memcpy(existing_device->phys_connector, new_device->phys_connector, sizeof(existing_device->phys_connector));
2138         }
2139 }
2140
2141 static inline void pqi_free_device(struct pqi_scsi_dev *device)
2142 {
2143         if (device) {
2144                 kfree(device->raid_map);
2145                 kfree(device);
2146         }
2147 }
2148
2149 /*
2150  * Called when exposing a new device to the OS fails in order to re-adjust
2151  * our internal SCSI device list to match the SCSI ML's view.
2152  */
2153
2154 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
2155         struct pqi_scsi_dev *device)
2156 {
2157         unsigned long flags;
2158
2159         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2160         list_del(&device->scsi_device_list_entry);
2161         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2162
2163         /* Allow the device structure to be freed later. */
2164         device->keep_device = false;
2165 }
2166
2167 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
2168 {
2169         if (device->is_expander_smp_device)
2170                 return device->sas_port != NULL;
2171
2172         return device->sdev != NULL;
2173 }
2174
2175 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
2176         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
2177 {
2178         int rc;
2179         unsigned int i;
2180         unsigned long flags;
2181         enum pqi_find_result find_result;
2182         struct pqi_scsi_dev *device;
2183         struct pqi_scsi_dev *next;
2184         struct pqi_scsi_dev *matching_device;
2185         LIST_HEAD(add_list);
2186         LIST_HEAD(delete_list);
2187
2188         /*
2189          * The idea here is to do as little work as possible while holding the
2190          * spinlock.  That's why we go to great pains to defer anything other
2191          * than updating the internal device list until after we release the
2192          * spinlock.
2193          */
2194
2195         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2196
2197         /* Assume that all devices in the existing list have gone away. */
2198         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
2199                 device->device_gone = true;
2200
2201         for (i = 0; i < num_new_devices; i++) {
2202                 device = new_device_list[i];
2203
2204                 find_result = pqi_scsi_find_entry(ctrl_info, device,
2205                         &matching_device);
2206
2207                 switch (find_result) {
2208                 case DEVICE_SAME:
2209                         /*
2210                          * The newly found device is already in the existing
2211                          * device list.
2212                          */
2213                         device->new_device = false;
2214                         matching_device->device_gone = false;
2215                         pqi_scsi_update_device(ctrl_info, matching_device, device);
2216                         break;
2217                 case DEVICE_NOT_FOUND:
2218                         /*
2219                          * The newly found device is NOT in the existing device
2220                          * list.
2221                          */
2222                         device->new_device = true;
2223                         break;
2224                 case DEVICE_CHANGED:
2225                         /*
2226                          * The original device has gone away and we need to add
2227                          * the new device.
2228                          */
2229                         device->new_device = true;
2230                         break;
2231                 }
2232         }
2233
2234         /* Process all devices that have gone away. */
2235         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2236                 scsi_device_list_entry) {
2237                 if (device->device_gone) {
2238                         list_del(&device->scsi_device_list_entry);
2239                         list_add_tail(&device->delete_list_entry, &delete_list);
2240                 }
2241         }
2242
2243         /* Process all new devices. */
2244         for (i = 0; i < num_new_devices; i++) {
2245                 device = new_device_list[i];
2246                 if (!device->new_device)
2247                         continue;
2248                 if (device->volume_offline)
2249                         continue;
2250                 list_add_tail(&device->scsi_device_list_entry,
2251                         &ctrl_info->scsi_device_list);
2252                 list_add_tail(&device->add_list_entry, &add_list);
2253                 /* To prevent this device structure from being freed later. */
2254                 device->keep_device = true;
2255         }
2256
2257         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2258
2259         /*
2260          * If OFA is in progress and there are devices that need to be deleted,
2261          * allow any pending reset operations to continue and unblock any SCSI
2262          * requests before removal.
2263          */
2264         if (pqi_ofa_in_progress(ctrl_info)) {
2265                 list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
2266                         if (pqi_is_device_added(device))
2267                                 pqi_device_remove_start(device);
2268                 pqi_ctrl_unblock_device_reset(ctrl_info);
2269                 pqi_scsi_unblock_requests(ctrl_info);
2270         }
2271
2272         /* Remove all devices that have gone away. */
2273         list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
2274                 if (device->volume_offline) {
2275                         pqi_dev_info(ctrl_info, "offline", device);
2276                         pqi_show_volume_status(ctrl_info, device);
2277                 } else {
2278                         pqi_dev_info(ctrl_info, "removed", device);
2279                 }
2280                 if (pqi_is_device_added(device))
2281                         pqi_remove_device(ctrl_info, device);
2282                 list_del(&device->delete_list_entry);
2283                 pqi_free_device(device);
2284         }
2285
2286         /*
2287          * Notify the SML of any existing device changes such as;
2288          * queue depth, device size.
2289          */
2290         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
2291                 if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
2292                         device->advertised_queue_depth = device->queue_depth;
2293                         scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
2294                         if (device->rescan) {
2295                                 scsi_rescan_device(&device->sdev->sdev_gendev);
2296                                 device->rescan = false;
2297                         }
2298                 }
2299         }
2300
2301         /* Expose any new devices. */
2302         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
2303                 if (!pqi_is_device_added(device)) {
2304                         rc = pqi_add_device(ctrl_info, device);
2305                         if (rc == 0) {
2306                                 pqi_dev_info(ctrl_info, "added", device);
2307                         } else {
2308                                 dev_warn(&ctrl_info->pci_dev->dev,
2309                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
2310                                         ctrl_info->scsi_host->host_no,
2311                                         device->bus, device->target,
2312                                         device->lun);
2313                                 pqi_fixup_botched_add(ctrl_info, device);
2314                         }
2315                 }
2316         }
2317
2318         ctrl_info->logical_volume_rescan_needed = false;
2319
2320 }
2321
2322 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
2323 {
2324         /*
2325          * Only support the HBA controller itself as a RAID
2326          * controller.  If it's a RAID controller other than
2327          * the HBA itself (an external RAID controller, for
2328          * example), we don't support it.
2329          */
2330         if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
2331                 !pqi_is_hba_lunid(device->scsi3addr))
2332                         return false;
2333
2334         return true;
2335 }
2336
2337 static inline bool pqi_skip_device(u8 *scsi3addr)
2338 {
2339         /* Ignore all masked devices. */
2340         if (MASKED_DEVICE(scsi3addr))
2341                 return true;
2342
2343         return false;
2344 }
2345
2346 static inline void pqi_mask_device(u8 *scsi3addr)
2347 {
2348         scsi3addr[3] |= 0xc0;
2349 }
2350
2351 static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device)
2352 {
2353         if (pqi_is_logical_device(device))
2354                 return false;
2355
2356         return (device->path_map & (device->path_map - 1)) != 0;
2357 }
2358
2359 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
2360 {
2361         return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
2362 }
2363
2364 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2365 {
2366         int i;
2367         int rc;
2368         LIST_HEAD(new_device_list_head);
2369         struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
2370         struct report_log_lun_list *logdev_list = NULL;
2371         struct report_phys_lun_16byte_wwid *phys_lun;
2372         struct report_log_lun *log_lun;
2373         struct bmic_identify_physical_device *id_phys = NULL;
2374         u32 num_physicals;
2375         u32 num_logicals;
2376         struct pqi_scsi_dev **new_device_list = NULL;
2377         struct pqi_scsi_dev *device;
2378         struct pqi_scsi_dev *next;
2379         unsigned int num_new_devices;
2380         unsigned int num_valid_devices;
2381         bool is_physical_device;
2382         u8 *scsi3addr;
2383         unsigned int physical_index;
2384         unsigned int logical_index;
2385         static char *out_of_memory_msg =
2386                 "failed to allocate memory, device discovery stopped";
2387
2388         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2389         if (rc)
2390                 goto out;
2391
2392         if (physdev_list)
2393                 num_physicals =
2394                         get_unaligned_be32(&physdev_list->header.list_length)
2395                                 / sizeof(physdev_list->lun_entries[0]);
2396         else
2397                 num_physicals = 0;
2398
2399         if (logdev_list)
2400                 num_logicals =
2401                         get_unaligned_be32(&logdev_list->header.list_length)
2402                                 / sizeof(logdev_list->lun_entries[0]);
2403         else
2404                 num_logicals = 0;
2405
2406         if (num_physicals) {
2407                 /*
2408                  * We need this buffer for calls to pqi_get_physical_disk_info()
2409                  * below.  We allocate it here instead of inside
2410                  * pqi_get_physical_disk_info() because it's a fairly large
2411                  * buffer.
2412                  */
2413                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2414                 if (!id_phys) {
2415                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2416                                 out_of_memory_msg);
2417                         rc = -ENOMEM;
2418                         goto out;
2419                 }
2420
2421                 if (pqi_hide_vsep) {
2422                         for (i = num_physicals - 1; i >= 0; i--) {
2423                                 phys_lun = &physdev_list->lun_entries[i];
2424                                 if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
2425                                         pqi_mask_device(phys_lun->lunid);
2426                                         break;
2427                                 }
2428                         }
2429                 }
2430         }
2431
2432         if (num_logicals &&
2433                 (logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
2434                 ctrl_info->lv_drive_type_mix_valid = true;
2435
2436         num_new_devices = num_physicals + num_logicals;
2437
2438         new_device_list = kmalloc_array(num_new_devices,
2439                                         sizeof(*new_device_list),
2440                                         GFP_KERNEL);
2441         if (!new_device_list) {
2442                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2443                 rc = -ENOMEM;
2444                 goto out;
2445         }
2446
2447         for (i = 0; i < num_new_devices; i++) {
2448                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2449                 if (!device) {
2450                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2451                                 out_of_memory_msg);
2452                         rc = -ENOMEM;
2453                         goto out;
2454                 }
2455                 list_add_tail(&device->new_device_list_entry,
2456                         &new_device_list_head);
2457         }
2458
2459         device = NULL;
2460         num_valid_devices = 0;
2461         physical_index = 0;
2462         logical_index = 0;
2463
2464         for (i = 0; i < num_new_devices; i++) {
2465
2466                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2467                         (pqi_expose_ld_first && i >= num_logicals)) {
2468                         is_physical_device = true;
2469                         phys_lun = &physdev_list->lun_entries[physical_index++];
2470                         log_lun = NULL;
2471                         scsi3addr = phys_lun->lunid;
2472                 } else {
2473                         is_physical_device = false;
2474                         phys_lun = NULL;
2475                         log_lun = &logdev_list->lun_entries[logical_index++];
2476                         scsi3addr = log_lun->lunid;
2477                 }
2478
2479                 if (is_physical_device && pqi_skip_device(scsi3addr))
2480                         continue;
2481
2482                 if (device)
2483                         device = list_next_entry(device, new_device_list_entry);
2484                 else
2485                         device = list_first_entry(&new_device_list_head,
2486                                 struct pqi_scsi_dev, new_device_list_entry);
2487
2488                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2489                 device->is_physical_device = is_physical_device;
2490                 if (is_physical_device) {
2491                         device->device_type = phys_lun->device_type;
2492                         if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2493                                 device->is_expander_smp_device = true;
2494                 } else {
2495                         device->is_external_raid_device =
2496                                 pqi_is_external_raid_addr(scsi3addr);
2497                 }
2498
2499                 if (!pqi_is_supported_device(device))
2500                         continue;
2501
2502                 /* Do not present disks that the OS cannot fully probe */
2503                 if (pqi_keep_device_offline(ctrl_info, device))
2504                         continue;
2505
2506                 /* Gather information about the device. */
2507                 rc = pqi_get_device_info(ctrl_info, device, id_phys);
2508                 if (rc == -ENOMEM) {
2509                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2510                                 out_of_memory_msg);
2511                         goto out;
2512                 }
2513                 if (rc) {
2514                         if (device->is_physical_device)
2515                                 dev_warn(&ctrl_info->pci_dev->dev,
2516                                         "obtaining device info failed, skipping physical device %016llx%016llx\n",
2517                                         get_unaligned_be64(&phys_lun->wwid[0]),
2518                                         get_unaligned_be64(&phys_lun->wwid[8]));
2519                         else
2520                                 dev_warn(&ctrl_info->pci_dev->dev,
2521                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2522                                         *((u32 *)&device->scsi3addr),
2523                                         *((u32 *)&device->scsi3addr[4]));
2524                         rc = 0;
2525                         continue;
2526                 }
2527
2528                 pqi_assign_bus_target_lun(device);
2529
2530                 if (device->is_physical_device) {
2531                         memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
2532                         if ((phys_lun->device_flags &
2533                                 CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2534                                 phys_lun->aio_handle) {
2535                                         device->aio_enabled = true;
2536                                         device->aio_handle =
2537                                                 phys_lun->aio_handle;
2538                         }
2539                 } else {
2540                         memcpy(device->volume_id, log_lun->volume_id,
2541                                 sizeof(device->volume_id));
2542                 }
2543
2544                 device->sas_address = get_unaligned_be64(&device->wwid[0]);
2545
2546                 new_device_list[num_valid_devices++] = device;
2547         }
2548
2549         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2550
2551 out:
2552         list_for_each_entry_safe(device, next, &new_device_list_head,
2553                 new_device_list_entry) {
2554                 if (device->keep_device)
2555                         continue;
2556                 list_del(&device->new_device_list_entry);
2557                 pqi_free_device(device);
2558         }
2559
2560         kfree(new_device_list);
2561         kfree(physdev_list);
2562         kfree(logdev_list);
2563         kfree(id_phys);
2564
2565         return rc;
2566 }
2567
2568 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2569 {
2570         int rc;
2571         int mutex_acquired;
2572
2573         if (pqi_ctrl_offline(ctrl_info))
2574                 return -ENXIO;
2575
2576         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
2577
2578         if (!mutex_acquired) {
2579                 if (pqi_ctrl_scan_blocked(ctrl_info))
2580                         return -EBUSY;
2581                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2582                 return -EINPROGRESS;
2583         }
2584
2585         rc = pqi_update_scsi_devices(ctrl_info);
2586         if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
2587                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2588
2589         mutex_unlock(&ctrl_info->scan_mutex);
2590
2591         return rc;
2592 }
2593
2594 static void pqi_scan_start(struct Scsi_Host *shost)
2595 {
2596         struct pqi_ctrl_info *ctrl_info;
2597
2598         ctrl_info = shost_to_hba(shost);
2599
2600         pqi_scan_scsi_devices(ctrl_info);
2601 }
2602
2603 /* Returns TRUE if scan is finished. */
2604
2605 static int pqi_scan_finished(struct Scsi_Host *shost,
2606         unsigned long elapsed_time)
2607 {
2608         struct pqi_ctrl_info *ctrl_info;
2609
2610         ctrl_info = shost_priv(shost);
2611
2612         return !mutex_is_locked(&ctrl_info->scan_mutex);
2613 }
2614
2615 static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
2616         struct raid_map *raid_map, u64 first_block)
2617 {
2618         u32 volume_blk_size;
2619
2620         /*
2621          * Set the encryption tweak values based on logical block address.
2622          * If the block size is 512, the tweak value is equal to the LBA.
2623          * For other block sizes, tweak value is (LBA * block size) / 512.
2624          */
2625         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2626         if (volume_blk_size != 512)
2627                 first_block = (first_block * volume_blk_size) / 512;
2628
2629         encryption_info->data_encryption_key_index =
2630                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2631         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2632         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2633 }
2634
2635 /*
2636  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2637  */
2638
2639 static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
2640         struct pqi_scsi_dev_raid_map_data *rmd)
2641 {
2642         bool is_supported = true;
2643
2644         switch (rmd->raid_level) {
2645         case SA_RAID_0:
2646                 break;
2647         case SA_RAID_1:
2648                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2649                         rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
2650                         is_supported = false;
2651                 break;
2652         case SA_RAID_TRIPLE:
2653                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2654                         rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
2655                         is_supported = false;
2656                 break;
2657         case SA_RAID_5:
2658                 if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
2659                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2660                         is_supported = false;
2661                 break;
2662         case SA_RAID_6:
2663                 if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
2664                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2665                         is_supported = false;
2666                 break;
2667         default:
2668                 is_supported = false;
2669                 break;
2670         }
2671
2672         return is_supported;
2673 }
2674
2675 #define PQI_RAID_BYPASS_INELIGIBLE      1
2676
2677 static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
2678         struct pqi_scsi_dev_raid_map_data *rmd)
2679 {
2680         /* Check for valid opcode, get LBA and block count. */
2681         switch (scmd->cmnd[0]) {
2682         case WRITE_6:
2683                 rmd->is_write = true;
2684                 fallthrough;
2685         case READ_6:
2686                 rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2687                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2688                 rmd->block_cnt = (u32)scmd->cmnd[4];
2689                 if (rmd->block_cnt == 0)
2690                         rmd->block_cnt = 256;
2691                 break;
2692         case WRITE_10:
2693                 rmd->is_write = true;
2694                 fallthrough;
2695         case READ_10:
2696                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2697                 rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2698                 break;
2699         case WRITE_12:
2700                 rmd->is_write = true;
2701                 fallthrough;
2702         case READ_12:
2703                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2704                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2705                 break;
2706         case WRITE_16:
2707                 rmd->is_write = true;
2708                 fallthrough;
2709         case READ_16:
2710                 rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
2711                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2712                 break;
2713         default:
2714                 /* Process via normal I/O path. */
2715                 return PQI_RAID_BYPASS_INELIGIBLE;
2716         }
2717
2718         put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
2719
2720         return 0;
2721 }
2722
2723 static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
2724         struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
2725 {
2726 #if BITS_PER_LONG == 32
2727         u64 tmpdiv;
2728 #endif
2729
2730         rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
2731
2732         /* Check for invalid block or wraparound. */
2733         if (rmd->last_block >=
2734                 get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2735                 rmd->last_block < rmd->first_block)
2736                 return PQI_RAID_BYPASS_INELIGIBLE;
2737
2738         rmd->data_disks_per_row =
2739                 get_unaligned_le16(&raid_map->data_disks_per_row);
2740         rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
2741         rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2742
2743         /* Calculate stripe information for the request. */
2744         rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
2745         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2746                 return PQI_RAID_BYPASS_INELIGIBLE;
2747 #if BITS_PER_LONG == 32
2748         tmpdiv = rmd->first_block;
2749         do_div(tmpdiv, rmd->blocks_per_row);
2750         rmd->first_row = tmpdiv;
2751         tmpdiv = rmd->last_block;
2752         do_div(tmpdiv, rmd->blocks_per_row);
2753         rmd->last_row = tmpdiv;
2754         rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
2755         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
2756         tmpdiv = rmd->first_row_offset;
2757         do_div(tmpdiv, rmd->strip_size);
2758         rmd->first_column = tmpdiv;
2759         tmpdiv = rmd->last_row_offset;
2760         do_div(tmpdiv, rmd->strip_size);
2761         rmd->last_column = tmpdiv;
2762 #else
2763         rmd->first_row = rmd->first_block / rmd->blocks_per_row;
2764         rmd->last_row = rmd->last_block / rmd->blocks_per_row;
2765         rmd->first_row_offset = (u32)(rmd->first_block -
2766                 (rmd->first_row * rmd->blocks_per_row));
2767         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
2768                 rmd->blocks_per_row));
2769         rmd->first_column = rmd->first_row_offset / rmd->strip_size;
2770         rmd->last_column = rmd->last_row_offset / rmd->strip_size;
2771 #endif
2772
2773         /* If this isn't a single row/column then give to the controller. */
2774         if (rmd->first_row != rmd->last_row ||
2775                 rmd->first_column != rmd->last_column)
2776                 return PQI_RAID_BYPASS_INELIGIBLE;
2777
2778         /* Proceeding with driver mapping. */
2779         rmd->total_disks_per_row = rmd->data_disks_per_row +
2780                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2781         rmd->map_row = ((u32)(rmd->first_row >>
2782                 raid_map->parity_rotation_shift)) %
2783                 get_unaligned_le16(&raid_map->row_cnt);
2784         rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
2785                 rmd->first_column;
2786
2787         return 0;
2788 }
2789
2790 static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
2791         struct raid_map *raid_map)
2792 {
2793 #if BITS_PER_LONG == 32
2794         u64 tmpdiv;
2795 #endif
2796
2797         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2798                 return PQI_RAID_BYPASS_INELIGIBLE;
2799
2800         /* RAID 50/60 */
2801         /* Verify first and last block are in same RAID group. */
2802         rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
2803 #if BITS_PER_LONG == 32
2804         tmpdiv = rmd->first_block;
2805         rmd->first_group = do_div(tmpdiv, rmd->stripesize);
2806         tmpdiv = rmd->first_group;
2807         do_div(tmpdiv, rmd->blocks_per_row);
2808         rmd->first_group = tmpdiv;
2809         tmpdiv = rmd->last_block;
2810         rmd->last_group = do_div(tmpdiv, rmd->stripesize);
2811         tmpdiv = rmd->last_group;
2812         do_div(tmpdiv, rmd->blocks_per_row);
2813         rmd->last_group = tmpdiv;
2814 #else
2815         rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
2816         rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
2817 #endif
2818         if (rmd->first_group != rmd->last_group)
2819                 return PQI_RAID_BYPASS_INELIGIBLE;
2820
2821         /* Verify request is in a single row of RAID 5/6. */
2822 #if BITS_PER_LONG == 32
2823         tmpdiv = rmd->first_block;
2824         do_div(tmpdiv, rmd->stripesize);
2825         rmd->first_row = tmpdiv;
2826         rmd->r5or6_first_row = tmpdiv;
2827         tmpdiv = rmd->last_block;
2828         do_div(tmpdiv, rmd->stripesize);
2829         rmd->r5or6_last_row = tmpdiv;
2830 #else
2831         rmd->first_row = rmd->r5or6_first_row =
2832                 rmd->first_block / rmd->stripesize;
2833         rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
2834 #endif
2835         if (rmd->r5or6_first_row != rmd->r5or6_last_row)
2836                 return PQI_RAID_BYPASS_INELIGIBLE;
2837
2838         /* Verify request is in a single column. */
2839 #if BITS_PER_LONG == 32
2840         tmpdiv = rmd->first_block;
2841         rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
2842         tmpdiv = rmd->first_row_offset;
2843         rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
2844         rmd->r5or6_first_row_offset = rmd->first_row_offset;
2845         tmpdiv = rmd->last_block;
2846         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
2847         tmpdiv = rmd->r5or6_last_row_offset;
2848         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
2849         tmpdiv = rmd->r5or6_first_row_offset;
2850         do_div(tmpdiv, rmd->strip_size);
2851         rmd->first_column = rmd->r5or6_first_column = tmpdiv;
2852         tmpdiv = rmd->r5or6_last_row_offset;
2853         do_div(tmpdiv, rmd->strip_size);
2854         rmd->r5or6_last_column = tmpdiv;
2855 #else
2856         rmd->first_row_offset = rmd->r5or6_first_row_offset =
2857                 (u32)((rmd->first_block % rmd->stripesize) %
2858                 rmd->blocks_per_row);
2859
2860         rmd->r5or6_last_row_offset =
2861                 (u32)((rmd->last_block % rmd->stripesize) %
2862                 rmd->blocks_per_row);
2863
2864         rmd->first_column =
2865                 rmd->r5or6_first_row_offset / rmd->strip_size;
2866         rmd->r5or6_first_column = rmd->first_column;
2867         rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
2868 #endif
2869         if (rmd->r5or6_first_column != rmd->r5or6_last_column)
2870                 return PQI_RAID_BYPASS_INELIGIBLE;
2871
2872         /* Request is eligible. */
2873         rmd->map_row =
2874                 ((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
2875                 get_unaligned_le16(&raid_map->row_cnt);
2876
2877         rmd->map_index = (rmd->first_group *
2878                 (get_unaligned_le16(&raid_map->row_cnt) *
2879                 rmd->total_disks_per_row)) +
2880                 (rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
2881
2882         if (rmd->is_write) {
2883                 u32 index;
2884
2885                 /*
2886                  * p_parity_it_nexus and q_parity_it_nexus are pointers to the
2887                  * parity entries inside the device's raid_map.
2888                  *
2889                  * A device's RAID map is bounded by: number of RAID disks squared.
2890                  *
2891                  * The devices RAID map size is checked during device
2892                  * initialization.
2893                  */
2894                 index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
2895                 index *= rmd->total_disks_per_row;
2896                 index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
2897
2898                 rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
2899                 if (rmd->raid_level == SA_RAID_6) {
2900                         rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
2901                         rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
2902                 }
2903 #if BITS_PER_LONG == 32
2904                 tmpdiv = rmd->first_block;
2905                 do_div(tmpdiv, rmd->blocks_per_row);
2906                 rmd->row = tmpdiv;
2907 #else
2908                 rmd->row = rmd->first_block / rmd->blocks_per_row;
2909 #endif
2910         }
2911
2912         return 0;
2913 }
2914
2915 static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
2916 {
2917         /* Build the new CDB for the physical disk I/O. */
2918         if (rmd->disk_block > 0xffffffff) {
2919                 rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
2920                 rmd->cdb[1] = 0;
2921                 put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
2922                 put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
2923                 rmd->cdb[14] = 0;
2924                 rmd->cdb[15] = 0;
2925                 rmd->cdb_length = 16;
2926         } else {
2927                 rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
2928                 rmd->cdb[1] = 0;
2929                 put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
2930                 rmd->cdb[6] = 0;
2931                 put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
2932                 rmd->cdb[9] = 0;
2933                 rmd->cdb_length = 10;
2934         }
2935 }
2936
2937 static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
2938         struct pqi_scsi_dev_raid_map_data *rmd)
2939 {
2940         u32 index;
2941         u32 group;
2942
2943         group = rmd->map_index / rmd->data_disks_per_row;
2944
2945         index = rmd->map_index - (group * rmd->data_disks_per_row);
2946         rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
2947         index += rmd->data_disks_per_row;
2948         rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
2949         if (rmd->layout_map_count > 2) {
2950                 index += rmd->data_disks_per_row;
2951                 rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
2952         }
2953
2954         rmd->num_it_nexus_entries = rmd->layout_map_count;
2955 }
2956
2957 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2958         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2959         struct pqi_queue_group *queue_group)
2960 {
2961         int rc;
2962         struct raid_map *raid_map;
2963         u32 group;
2964         u32 next_bypass_group;
2965         struct pqi_encryption_info *encryption_info_ptr;
2966         struct pqi_encryption_info encryption_info;
2967         struct pqi_scsi_dev_raid_map_data rmd = { 0 };
2968
2969         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
2970         if (rc)
2971                 return PQI_RAID_BYPASS_INELIGIBLE;
2972
2973         rmd.raid_level = device->raid_level;
2974
2975         if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
2976                 return PQI_RAID_BYPASS_INELIGIBLE;
2977
2978         if (unlikely(rmd.block_cnt == 0))
2979                 return PQI_RAID_BYPASS_INELIGIBLE;
2980
2981         raid_map = device->raid_map;
2982
2983         rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
2984         if (rc)
2985                 return PQI_RAID_BYPASS_INELIGIBLE;
2986
2987         if (device->raid_level == SA_RAID_1 ||
2988                 device->raid_level == SA_RAID_TRIPLE) {
2989                 if (rmd.is_write) {
2990                         pqi_calc_aio_r1_nexus(raid_map, &rmd);
2991                 } else {
2992                         group = device->next_bypass_group[rmd.map_index];
2993                         next_bypass_group = group + 1;
2994                         if (next_bypass_group >= rmd.layout_map_count)
2995                                 next_bypass_group = 0;
2996                         device->next_bypass_group[rmd.map_index] = next_bypass_group;
2997                         rmd.map_index += group * rmd.data_disks_per_row;
2998                 }
2999         } else if ((device->raid_level == SA_RAID_5 ||
3000                 device->raid_level == SA_RAID_6) &&
3001                 (rmd.layout_map_count > 1 || rmd.is_write)) {
3002                 rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
3003                 if (rc)
3004                         return PQI_RAID_BYPASS_INELIGIBLE;
3005         }
3006
3007         if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
3008                 return PQI_RAID_BYPASS_INELIGIBLE;
3009
3010         rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
3011         rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
3012                 rmd.first_row * rmd.strip_size +
3013                 (rmd.first_row_offset - rmd.first_column * rmd.strip_size);
3014         rmd.disk_block_cnt = rmd.block_cnt;
3015
3016         /* Handle differing logical/physical block sizes. */
3017         if (raid_map->phys_blk_shift) {
3018                 rmd.disk_block <<= raid_map->phys_blk_shift;
3019                 rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
3020         }
3021
3022         if (unlikely(rmd.disk_block_cnt > 0xffff))
3023                 return PQI_RAID_BYPASS_INELIGIBLE;
3024
3025         pqi_set_aio_cdb(&rmd);
3026
3027         if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
3028                 if (rmd.data_length > device->max_transfer_encrypted)
3029                         return PQI_RAID_BYPASS_INELIGIBLE;
3030                 pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
3031                 encryption_info_ptr = &encryption_info;
3032         } else {
3033                 encryption_info_ptr = NULL;
3034         }
3035
3036         if (rmd.is_write) {
3037                 switch (device->raid_level) {
3038                 case SA_RAID_1:
3039                 case SA_RAID_TRIPLE:
3040                         return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
3041                                 encryption_info_ptr, device, &rmd);
3042                 case SA_RAID_5:
3043                 case SA_RAID_6:
3044                         return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
3045                                 encryption_info_ptr, device, &rmd);
3046                 }
3047         }
3048
3049         return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
3050                 rmd.cdb, rmd.cdb_length, queue_group,
3051                 encryption_info_ptr, true, false);
3052 }
3053
3054 #define PQI_STATUS_IDLE         0x0
3055
3056 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
3057 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
3058
3059 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
3060 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
3061 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
3062 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
3063 #define PQI_DEVICE_STATE_ERROR                          0x4
3064
3065 #define PQI_MODE_READY_TIMEOUT_SECS             30
3066 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
3067
3068 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
3069 {
3070         struct pqi_device_registers __iomem *pqi_registers;
3071         unsigned long timeout;
3072         u64 signature;
3073         u8 status;
3074
3075         pqi_registers = ctrl_info->pqi_registers;
3076         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
3077
3078         while (1) {
3079                 signature = readq(&pqi_registers->signature);
3080                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
3081                         sizeof(signature)) == 0)
3082                         break;
3083                 if (time_after(jiffies, timeout)) {
3084                         dev_err(&ctrl_info->pci_dev->dev,
3085                                 "timed out waiting for PQI signature\n");
3086                         return -ETIMEDOUT;
3087                 }
3088                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3089         }
3090
3091         while (1) {
3092                 status = readb(&pqi_registers->function_and_status_code);
3093                 if (status == PQI_STATUS_IDLE)
3094                         break;
3095                 if (time_after(jiffies, timeout)) {
3096                         dev_err(&ctrl_info->pci_dev->dev,
3097                                 "timed out waiting for PQI IDLE\n");
3098                         return -ETIMEDOUT;
3099                 }
3100                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3101         }
3102
3103         while (1) {
3104                 if (readl(&pqi_registers->device_status) ==
3105                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
3106                         break;
3107                 if (time_after(jiffies, timeout)) {
3108                         dev_err(&ctrl_info->pci_dev->dev,
3109                                 "timed out waiting for PQI all registers ready\n");
3110                         return -ETIMEDOUT;
3111                 }
3112                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3113         }
3114
3115         return 0;
3116 }
3117
3118 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
3119 {
3120         struct pqi_scsi_dev *device;
3121
3122         device = io_request->scmd->device->hostdata;
3123         device->raid_bypass_enabled = false;
3124         device->aio_enabled = false;
3125 }
3126
3127 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
3128 {
3129         struct pqi_ctrl_info *ctrl_info;
3130         struct pqi_scsi_dev *device;
3131
3132         device = sdev->hostdata;
3133         if (device->device_offline)
3134                 return;
3135
3136         device->device_offline = true;
3137         ctrl_info = shost_to_hba(sdev->host);
3138         pqi_schedule_rescan_worker(ctrl_info);
3139         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
3140                 path, ctrl_info->scsi_host->host_no, device->bus,
3141                 device->target, device->lun);
3142 }
3143
3144 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
3145 {
3146         u8 scsi_status;
3147         u8 host_byte;
3148         struct scsi_cmnd *scmd;
3149         struct pqi_raid_error_info *error_info;
3150         size_t sense_data_length;
3151         int residual_count;
3152         int xfer_count;
3153         struct scsi_sense_hdr sshdr;
3154
3155         scmd = io_request->scmd;
3156         if (!scmd)
3157                 return;
3158
3159         error_info = io_request->error_info;
3160         scsi_status = error_info->status;
3161         host_byte = DID_OK;
3162
3163         switch (error_info->data_out_result) {
3164         case PQI_DATA_IN_OUT_GOOD:
3165                 break;
3166         case PQI_DATA_IN_OUT_UNDERFLOW:
3167                 xfer_count =
3168                         get_unaligned_le32(&error_info->data_out_transferred);
3169                 residual_count = scsi_bufflen(scmd) - xfer_count;
3170                 scsi_set_resid(scmd, residual_count);
3171                 if (xfer_count < scmd->underflow)
3172                         host_byte = DID_SOFT_ERROR;
3173                 break;
3174         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
3175         case PQI_DATA_IN_OUT_ABORTED:
3176                 host_byte = DID_ABORT;
3177                 break;
3178         case PQI_DATA_IN_OUT_TIMEOUT:
3179                 host_byte = DID_TIME_OUT;
3180                 break;
3181         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
3182         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
3183         case PQI_DATA_IN_OUT_BUFFER_ERROR:
3184         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
3185         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
3186         case PQI_DATA_IN_OUT_ERROR:
3187         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
3188         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
3189         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
3190         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
3191         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
3192         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
3193         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
3194         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
3195         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
3196         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
3197         default:
3198                 host_byte = DID_ERROR;
3199                 break;
3200         }
3201
3202         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
3203         if (sense_data_length == 0)
3204                 sense_data_length =
3205                         get_unaligned_le16(&error_info->response_data_length);
3206         if (sense_data_length) {
3207                 if (sense_data_length > sizeof(error_info->data))
3208                         sense_data_length = sizeof(error_info->data);
3209
3210                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3211                         scsi_normalize_sense(error_info->data,
3212                                 sense_data_length, &sshdr) &&
3213                                 sshdr.sense_key == HARDWARE_ERROR &&
3214                                 sshdr.asc == 0x3e) {
3215                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
3216                         struct pqi_scsi_dev *device = scmd->device->hostdata;
3217
3218                         switch (sshdr.ascq) {
3219                         case 0x1: /* LOGICAL UNIT FAILURE */
3220                                 if (printk_ratelimit())
3221                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
3222                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3223                                 pqi_take_device_offline(scmd->device, "RAID");
3224                                 host_byte = DID_NO_CONNECT;
3225                                 break;
3226
3227                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
3228                                 if (printk_ratelimit())
3229                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
3230                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3231                                 break;
3232                         }
3233                 }
3234
3235                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3236                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
3237                 memcpy(scmd->sense_buffer, error_info->data,
3238                         sense_data_length);
3239         }
3240
3241         scmd->result = scsi_status;
3242         set_host_byte(scmd, host_byte);
3243 }
3244
3245 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
3246 {
3247         u8 scsi_status;
3248         u8 host_byte;
3249         struct scsi_cmnd *scmd;
3250         struct pqi_aio_error_info *error_info;
3251         size_t sense_data_length;
3252         int residual_count;
3253         int xfer_count;
3254         bool device_offline;
3255         struct pqi_scsi_dev *device;
3256
3257         scmd = io_request->scmd;
3258         error_info = io_request->error_info;
3259         host_byte = DID_OK;
3260         sense_data_length = 0;
3261         device_offline = false;
3262         device = scmd->device->hostdata;
3263
3264         switch (error_info->service_response) {
3265         case PQI_AIO_SERV_RESPONSE_COMPLETE:
3266                 scsi_status = error_info->status;
3267                 break;
3268         case PQI_AIO_SERV_RESPONSE_FAILURE:
3269                 switch (error_info->status) {
3270                 case PQI_AIO_STATUS_IO_ABORTED:
3271                         scsi_status = SAM_STAT_TASK_ABORTED;
3272                         break;
3273                 case PQI_AIO_STATUS_UNDERRUN:
3274                         scsi_status = SAM_STAT_GOOD;
3275                         residual_count = get_unaligned_le32(
3276                                                 &error_info->residual_count);
3277                         scsi_set_resid(scmd, residual_count);
3278                         xfer_count = scsi_bufflen(scmd) - residual_count;
3279                         if (xfer_count < scmd->underflow)
3280                                 host_byte = DID_SOFT_ERROR;
3281                         break;
3282                 case PQI_AIO_STATUS_OVERRUN:
3283                         scsi_status = SAM_STAT_GOOD;
3284                         break;
3285                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
3286                         pqi_aio_path_disabled(io_request);
3287                         if (pqi_is_multipath_device(device)) {
3288                                 pqi_device_remove_start(device);
3289                                 host_byte = DID_NO_CONNECT;
3290                                 scsi_status = SAM_STAT_CHECK_CONDITION;
3291                         } else {
3292                                 scsi_status = SAM_STAT_GOOD;
3293                                 io_request->status = -EAGAIN;
3294                         }
3295                         break;
3296                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
3297                 case PQI_AIO_STATUS_INVALID_DEVICE:
3298                         if (!io_request->raid_bypass) {
3299                                 device_offline = true;
3300                                 pqi_take_device_offline(scmd->device, "AIO");
3301                                 host_byte = DID_NO_CONNECT;
3302                         }
3303                         scsi_status = SAM_STAT_CHECK_CONDITION;
3304                         break;
3305                 case PQI_AIO_STATUS_IO_ERROR:
3306                 default:
3307                         scsi_status = SAM_STAT_CHECK_CONDITION;
3308                         break;
3309                 }
3310                 break;
3311         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
3312         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
3313                 scsi_status = SAM_STAT_GOOD;
3314                 break;
3315         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
3316         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
3317         default:
3318                 scsi_status = SAM_STAT_CHECK_CONDITION;
3319                 break;
3320         }
3321
3322         if (error_info->data_present) {
3323                 sense_data_length =
3324                         get_unaligned_le16(&error_info->data_length);
3325                 if (sense_data_length) {
3326                         if (sense_data_length > sizeof(error_info->data))
3327                                 sense_data_length = sizeof(error_info->data);
3328                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3329                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
3330                         memcpy(scmd->sense_buffer, error_info->data,
3331                                 sense_data_length);
3332                 }
3333         }
3334
3335         if (device_offline && sense_data_length == 0)
3336                 scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
3337
3338         scmd->result = scsi_status;
3339         set_host_byte(scmd, host_byte);
3340 }
3341
3342 static void pqi_process_io_error(unsigned int iu_type,
3343         struct pqi_io_request *io_request)
3344 {
3345         switch (iu_type) {
3346         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3347                 pqi_process_raid_io_error(io_request);
3348                 break;
3349         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3350                 pqi_process_aio_io_error(io_request);
3351                 break;
3352         }
3353 }
3354
3355 static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
3356         struct pqi_task_management_response *response)
3357 {
3358         int rc;
3359
3360         switch (response->response_code) {
3361         case SOP_TMF_COMPLETE:
3362         case SOP_TMF_FUNCTION_SUCCEEDED:
3363                 rc = 0;
3364                 break;
3365         case SOP_TMF_REJECTED:
3366                 rc = -EAGAIN;
3367                 break;
3368         case SOP_RC_INCORRECT_LOGICAL_UNIT:
3369                 rc = -ENODEV;
3370                 break;
3371         default:
3372                 rc = -EIO;
3373                 break;
3374         }
3375
3376         if (rc)
3377                 dev_err(&ctrl_info->pci_dev->dev,
3378                         "Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
3379
3380         return rc;
3381 }
3382
3383 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info,
3384         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
3385 {
3386         pqi_take_ctrl_offline(ctrl_info, ctrl_shutdown_reason);
3387 }
3388
3389 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
3390 {
3391         int num_responses;
3392         pqi_index_t oq_pi;
3393         pqi_index_t oq_ci;
3394         struct pqi_io_request *io_request;
3395         struct pqi_io_response *response;
3396         u16 request_id;
3397
3398         num_responses = 0;
3399         oq_ci = queue_group->oq_ci_copy;
3400
3401         while (1) {
3402                 oq_pi = readl(queue_group->oq_pi);
3403                 if (oq_pi >= ctrl_info->num_elements_per_oq) {
3404                         pqi_invalid_response(ctrl_info, PQI_IO_PI_OUT_OF_RANGE);
3405                         dev_err(&ctrl_info->pci_dev->dev,
3406                                 "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3407                                 oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
3408                         return -1;
3409                 }
3410                 if (oq_pi == oq_ci)
3411                         break;
3412
3413                 num_responses++;
3414                 response = queue_group->oq_element_array +
3415                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3416
3417                 request_id = get_unaligned_le16(&response->request_id);
3418                 if (request_id >= ctrl_info->max_io_slots) {
3419                         pqi_invalid_response(ctrl_info, PQI_INVALID_REQ_ID);
3420                         dev_err(&ctrl_info->pci_dev->dev,
3421                                 "request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
3422                                 request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
3423                         return -1;
3424                 }
3425
3426                 io_request = &ctrl_info->io_request_pool[request_id];
3427                 if (atomic_read(&io_request->refcount) == 0) {
3428                         pqi_invalid_response(ctrl_info, PQI_UNMATCHED_REQ_ID);
3429                         dev_err(&ctrl_info->pci_dev->dev,
3430                                 "request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
3431                                 request_id, oq_pi, oq_ci);
3432                         return -1;
3433                 }
3434
3435                 switch (response->header.iu_type) {
3436                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
3437                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
3438                         if (io_request->scmd)
3439                                 io_request->scmd->result = 0;
3440                         fallthrough;
3441                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
3442                         break;
3443                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
3444                         io_request->status =
3445                                 get_unaligned_le16(
3446                                 &((struct pqi_vendor_general_response *)response)->status);
3447                         break;
3448                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
3449                         io_request->status = pqi_interpret_task_management_response(ctrl_info,
3450                                 (void *)response);
3451                         break;
3452                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
3453                         pqi_aio_path_disabled(io_request);
3454                         io_request->status = -EAGAIN;
3455                         break;
3456                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3457                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3458                         io_request->error_info = ctrl_info->error_buffer +
3459                                 (get_unaligned_le16(&response->error_index) *
3460                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
3461                         pqi_process_io_error(response->header.iu_type, io_request);
3462                         break;
3463                 default:
3464                         pqi_invalid_response(ctrl_info, PQI_UNEXPECTED_IU_TYPE);
3465                         dev_err(&ctrl_info->pci_dev->dev,
3466                                 "unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
3467                                 response->header.iu_type, oq_pi, oq_ci);
3468                         return -1;
3469                 }
3470
3471                 io_request->io_complete_callback(io_request, io_request->context);
3472
3473                 /*
3474                  * Note that the I/O request structure CANNOT BE TOUCHED after
3475                  * returning from the I/O completion callback!
3476                  */
3477                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
3478         }
3479
3480         if (num_responses) {
3481                 queue_group->oq_ci_copy = oq_ci;
3482                 writel(oq_ci, queue_group->oq_ci);
3483         }
3484
3485         return num_responses;
3486 }
3487
3488 static inline unsigned int pqi_num_elements_free(unsigned int pi,
3489         unsigned int ci, unsigned int elements_in_queue)
3490 {
3491         unsigned int num_elements_used;
3492
3493         if (pi >= ci)
3494                 num_elements_used = pi - ci;
3495         else
3496                 num_elements_used = elements_in_queue - ci + pi;
3497
3498         return elements_in_queue - num_elements_used - 1;
3499 }
3500
3501 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3502         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3503 {
3504         pqi_index_t iq_pi;
3505         pqi_index_t iq_ci;
3506         unsigned long flags;
3507         void *next_element;
3508         struct pqi_queue_group *queue_group;
3509
3510         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3511         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3512
3513         while (1) {
3514                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3515
3516                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3517                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3518
3519                 if (pqi_num_elements_free(iq_pi, iq_ci,
3520                         ctrl_info->num_elements_per_iq))
3521                         break;
3522
3523                 spin_unlock_irqrestore(
3524                         &queue_group->submit_lock[RAID_PATH], flags);
3525
3526                 if (pqi_ctrl_offline(ctrl_info))
3527                         return;
3528         }
3529
3530         next_element = queue_group->iq_element_array[RAID_PATH] +
3531                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3532
3533         memcpy(next_element, iu, iu_length);
3534
3535         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3536         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3537
3538         /*
3539          * This write notifies the controller that an IU is available to be
3540          * processed.
3541          */
3542         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3543
3544         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3545 }
3546
3547 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3548         struct pqi_event *event)
3549 {
3550         struct pqi_event_acknowledge_request request;
3551
3552         memset(&request, 0, sizeof(request));
3553
3554         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3555         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3556                 &request.header.iu_length);
3557         request.event_type = event->event_type;
3558         put_unaligned_le16(event->event_id, &request.event_id);
3559         put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
3560
3561         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3562 }
3563
3564 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3565 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3566
3567 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3568         struct pqi_ctrl_info *ctrl_info)
3569 {
3570         u8 status;
3571         unsigned long timeout;
3572
3573         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * HZ) + jiffies;
3574
3575         while (1) {
3576                 status = pqi_read_soft_reset_status(ctrl_info);
3577                 if (status & PQI_SOFT_RESET_INITIATE)
3578                         return RESET_INITIATE_DRIVER;
3579
3580                 if (status & PQI_SOFT_RESET_ABORT)
3581                         return RESET_ABORT;
3582
3583                 if (!sis_is_firmware_running(ctrl_info))
3584                         return RESET_NORESPONSE;
3585
3586                 if (time_after(jiffies, timeout)) {
3587                         dev_warn(&ctrl_info->pci_dev->dev,
3588                                 "timed out waiting for soft reset status\n");
3589                         return RESET_TIMEDOUT;
3590                 }
3591
3592                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3593         }
3594 }
3595
3596 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
3597 {
3598         int rc;
3599         unsigned int delay_secs;
3600         enum pqi_soft_reset_status reset_status;
3601
3602         if (ctrl_info->soft_reset_handshake_supported)
3603                 reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
3604         else
3605                 reset_status = RESET_INITIATE_FIRMWARE;
3606
3607         delay_secs = PQI_POST_RESET_DELAY_SECS;
3608
3609         switch (reset_status) {
3610         case RESET_TIMEDOUT:
3611                 delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
3612                 fallthrough;
3613         case RESET_INITIATE_DRIVER:
3614                 dev_info(&ctrl_info->pci_dev->dev,
3615                                 "Online Firmware Activation: resetting controller\n");
3616                 sis_soft_reset(ctrl_info);
3617                 fallthrough;
3618         case RESET_INITIATE_FIRMWARE:
3619                 ctrl_info->pqi_mode_enabled = false;
3620                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
3621                 rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
3622                 pqi_ofa_free_host_buffer(ctrl_info);
3623                 pqi_ctrl_ofa_done(ctrl_info);
3624                 dev_info(&ctrl_info->pci_dev->dev,
3625                                 "Online Firmware Activation: %s\n",
3626                                 rc == 0 ? "SUCCESS" : "FAILED");
3627                 break;
3628         case RESET_ABORT:
3629                 dev_info(&ctrl_info->pci_dev->dev,
3630                                 "Online Firmware Activation ABORTED\n");
3631                 if (ctrl_info->soft_reset_handshake_supported)
3632                         pqi_clear_soft_reset_status(ctrl_info);
3633                 pqi_ofa_free_host_buffer(ctrl_info);
3634                 pqi_ctrl_ofa_done(ctrl_info);
3635                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3636                 break;
3637         case RESET_NORESPONSE:
3638                 fallthrough;
3639         default:
3640                 dev_err(&ctrl_info->pci_dev->dev,
3641                         "unexpected Online Firmware Activation reset status: 0x%x\n",
3642                         reset_status);
3643                 pqi_ofa_free_host_buffer(ctrl_info);
3644                 pqi_ctrl_ofa_done(ctrl_info);
3645                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3646                 pqi_take_ctrl_offline(ctrl_info, PQI_OFA_RESPONSE_TIMEOUT);
3647                 break;
3648         }
3649 }
3650
3651 static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
3652 {
3653         struct pqi_ctrl_info *ctrl_info;
3654
3655         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
3656
3657         pqi_ctrl_ofa_start(ctrl_info);
3658         pqi_ofa_setup_host_buffer(ctrl_info);
3659         pqi_ofa_host_memory_update(ctrl_info);
3660 }
3661
3662 static void pqi_ofa_quiesce_worker(struct work_struct *work)
3663 {
3664         struct pqi_ctrl_info *ctrl_info;
3665         struct pqi_event *event;
3666
3667         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
3668
3669         event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
3670
3671         pqi_ofa_ctrl_quiesce(ctrl_info);
3672         pqi_acknowledge_event(ctrl_info, event);
3673         pqi_process_soft_reset(ctrl_info);
3674 }
3675
3676 static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3677         struct pqi_event *event)
3678 {
3679         bool ack_event;
3680
3681         ack_event = true;
3682
3683         switch (event->event_id) {
3684         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3685                 dev_info(&ctrl_info->pci_dev->dev,
3686                         "received Online Firmware Activation memory allocation request\n");
3687                 schedule_work(&ctrl_info->ofa_memory_alloc_work);
3688                 break;
3689         case PQI_EVENT_OFA_QUIESCE:
3690                 dev_info(&ctrl_info->pci_dev->dev,
3691                         "received Online Firmware Activation quiesce request\n");
3692                 schedule_work(&ctrl_info->ofa_quiesce_work);
3693                 ack_event = false;
3694                 break;
3695         case PQI_EVENT_OFA_CANCELED:
3696                 dev_info(&ctrl_info->pci_dev->dev,
3697                         "received Online Firmware Activation cancel request: reason: %u\n",
3698                         ctrl_info->ofa_cancel_reason);
3699                 pqi_ofa_free_host_buffer(ctrl_info);
3700                 pqi_ctrl_ofa_done(ctrl_info);
3701                 break;
3702         default:
3703                 dev_err(&ctrl_info->pci_dev->dev,
3704                         "received unknown Online Firmware Activation request: event ID: %u\n",
3705                         event->event_id);
3706                 break;
3707         }
3708
3709         return ack_event;
3710 }
3711
3712 static void pqi_disable_raid_bypass(struct pqi_ctrl_info *ctrl_info)
3713 {
3714         unsigned long flags;
3715         struct pqi_scsi_dev *device;
3716
3717         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
3718
3719         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
3720                 if (device->raid_bypass_enabled)
3721                         device->raid_bypass_enabled = false;
3722
3723         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
3724 }
3725
3726 static void pqi_event_worker(struct work_struct *work)
3727 {
3728         unsigned int i;
3729         bool rescan_needed;
3730         struct pqi_ctrl_info *ctrl_info;
3731         struct pqi_event *event;
3732         bool ack_event;
3733
3734         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3735
3736         pqi_ctrl_busy(ctrl_info);
3737         pqi_wait_if_ctrl_blocked(ctrl_info);
3738         if (pqi_ctrl_offline(ctrl_info))
3739                 goto out;
3740
3741         rescan_needed = false;
3742         event = ctrl_info->events;
3743         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3744                 if (event->pending) {
3745                         event->pending = false;
3746                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3747                                 ack_event = pqi_ofa_process_event(ctrl_info, event);
3748                         } else {
3749                                 ack_event = true;
3750                                 rescan_needed = true;
3751                                 if (event->event_type == PQI_EVENT_TYPE_LOGICAL_DEVICE)
3752                                         ctrl_info->logical_volume_rescan_needed = true;
3753                                 else if (event->event_type == PQI_EVENT_TYPE_AIO_STATE_CHANGE)
3754                                         pqi_disable_raid_bypass(ctrl_info);
3755                         }
3756                         if (ack_event)
3757                                 pqi_acknowledge_event(ctrl_info, event);
3758                 }
3759                 event++;
3760         }
3761
3762 #define PQI_RESCAN_WORK_FOR_EVENT_DELAY         (5 * HZ)
3763
3764         if (rescan_needed)
3765                 pqi_schedule_rescan_worker_with_delay(ctrl_info,
3766                         PQI_RESCAN_WORK_FOR_EVENT_DELAY);
3767
3768 out:
3769         pqi_ctrl_unbusy(ctrl_info);
3770 }
3771
3772 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
3773
3774 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3775 {
3776         int num_interrupts;
3777         u32 heartbeat_count;
3778         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
3779
3780         pqi_check_ctrl_health(ctrl_info);
3781         if (pqi_ctrl_offline(ctrl_info))
3782                 return;
3783
3784         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3785         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3786
3787         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3788                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3789                         dev_err(&ctrl_info->pci_dev->dev,
3790                                 "no heartbeat detected - last heartbeat count: %u\n",
3791                                 heartbeat_count);
3792                         pqi_take_ctrl_offline(ctrl_info, PQI_NO_HEARTBEAT);
3793                         return;
3794                 }
3795         } else {
3796                 ctrl_info->previous_num_interrupts = num_interrupts;
3797         }
3798
3799         ctrl_info->previous_heartbeat_count = heartbeat_count;
3800         mod_timer(&ctrl_info->heartbeat_timer,
3801                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3802 }
3803
3804 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3805 {
3806         if (!ctrl_info->heartbeat_counter)
3807                 return;
3808
3809         ctrl_info->previous_num_interrupts =
3810                 atomic_read(&ctrl_info->num_interrupts);
3811         ctrl_info->previous_heartbeat_count =
3812                 pqi_read_heartbeat_counter(ctrl_info);
3813
3814         ctrl_info->heartbeat_timer.expires =
3815                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3816         add_timer(&ctrl_info->heartbeat_timer);
3817 }
3818
3819 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3820 {
3821         del_timer_sync(&ctrl_info->heartbeat_timer);
3822 }
3823
3824 static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
3825         struct pqi_event *event, struct pqi_event_response *response)
3826 {
3827         switch (event->event_id) {
3828         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3829                 ctrl_info->ofa_bytes_requested =
3830                         get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
3831                 break;
3832         case PQI_EVENT_OFA_CANCELED:
3833                 ctrl_info->ofa_cancel_reason =
3834                         get_unaligned_le16(&response->data.ofa_cancelled.reason);
3835                 break;
3836         }
3837 }
3838
3839 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3840 {
3841         int num_events;
3842         pqi_index_t oq_pi;
3843         pqi_index_t oq_ci;
3844         struct pqi_event_queue *event_queue;
3845         struct pqi_event_response *response;
3846         struct pqi_event *event;
3847         int event_index;
3848
3849         event_queue = &ctrl_info->event_queue;
3850         num_events = 0;
3851         oq_ci = event_queue->oq_ci_copy;
3852
3853         while (1) {
3854                 oq_pi = readl(event_queue->oq_pi);
3855                 if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3856                         pqi_invalid_response(ctrl_info, PQI_EVENT_PI_OUT_OF_RANGE);
3857                         dev_err(&ctrl_info->pci_dev->dev,
3858                                 "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3859                                 oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3860                         return -1;
3861                 }
3862
3863                 if (oq_pi == oq_ci)
3864                         break;
3865
3866                 num_events++;
3867                 response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3868
3869                 event_index = pqi_event_type_to_event_index(response->event_type);
3870
3871                 if (event_index >= 0 && response->request_acknowledge) {
3872                         event = &ctrl_info->events[event_index];
3873                         event->pending = true;
3874                         event->event_type = response->event_type;
3875                         event->event_id = get_unaligned_le16(&response->event_id);
3876                         event->additional_event_id =
3877                                 get_unaligned_le32(&response->additional_event_id);
3878                         if (event->event_type == PQI_EVENT_TYPE_OFA)
3879                                 pqi_ofa_capture_event_payload(ctrl_info, event, response);
3880                 }
3881
3882                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3883         }
3884
3885         if (num_events) {
3886                 event_queue->oq_ci_copy = oq_ci;
3887                 writel(oq_ci, event_queue->oq_ci);
3888                 schedule_work(&ctrl_info->event_work);
3889         }
3890
3891         return num_events;
3892 }
3893
3894 #define PQI_LEGACY_INTX_MASK    0x1
3895
3896 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
3897 {
3898         u32 intx_mask;
3899         struct pqi_device_registers __iomem *pqi_registers;
3900         volatile void __iomem *register_addr;
3901
3902         pqi_registers = ctrl_info->pqi_registers;
3903
3904         if (enable_intx)
3905                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3906         else
3907                 register_addr = &pqi_registers->legacy_intx_mask_set;
3908
3909         intx_mask = readl(register_addr);
3910         intx_mask |= PQI_LEGACY_INTX_MASK;
3911         writel(intx_mask, register_addr);
3912 }
3913
3914 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3915         enum pqi_irq_mode new_mode)
3916 {
3917         switch (ctrl_info->irq_mode) {
3918         case IRQ_MODE_MSIX:
3919                 switch (new_mode) {
3920                 case IRQ_MODE_MSIX:
3921                         break;
3922                 case IRQ_MODE_INTX:
3923                         pqi_configure_legacy_intx(ctrl_info, true);
3924                         sis_enable_intx(ctrl_info);
3925                         break;
3926                 case IRQ_MODE_NONE:
3927                         break;
3928                 }
3929                 break;
3930         case IRQ_MODE_INTX:
3931                 switch (new_mode) {
3932                 case IRQ_MODE_MSIX:
3933                         pqi_configure_legacy_intx(ctrl_info, false);
3934                         sis_enable_msix(ctrl_info);
3935                         break;
3936                 case IRQ_MODE_INTX:
3937                         break;
3938                 case IRQ_MODE_NONE:
3939                         pqi_configure_legacy_intx(ctrl_info, false);
3940                         break;
3941                 }
3942                 break;
3943         case IRQ_MODE_NONE:
3944                 switch (new_mode) {
3945                 case IRQ_MODE_MSIX:
3946                         sis_enable_msix(ctrl_info);
3947                         break;
3948                 case IRQ_MODE_INTX:
3949                         pqi_configure_legacy_intx(ctrl_info, true);
3950                         sis_enable_intx(ctrl_info);
3951                         break;
3952                 case IRQ_MODE_NONE:
3953                         break;
3954                 }
3955                 break;
3956         }
3957
3958         ctrl_info->irq_mode = new_mode;
3959 }
3960
3961 #define PQI_LEGACY_INTX_PENDING         0x1
3962
3963 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3964 {
3965         bool valid_irq;
3966         u32 intx_status;
3967
3968         switch (ctrl_info->irq_mode) {
3969         case IRQ_MODE_MSIX:
3970                 valid_irq = true;
3971                 break;
3972         case IRQ_MODE_INTX:
3973                 intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
3974                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3975                         valid_irq = true;
3976                 else
3977                         valid_irq = false;
3978                 break;
3979         case IRQ_MODE_NONE:
3980         default:
3981                 valid_irq = false;
3982                 break;
3983         }
3984
3985         return valid_irq;
3986 }
3987
3988 static irqreturn_t pqi_irq_handler(int irq, void *data)
3989 {
3990         struct pqi_ctrl_info *ctrl_info;
3991         struct pqi_queue_group *queue_group;
3992         int num_io_responses_handled;
3993         int num_events_handled;
3994
3995         queue_group = data;
3996         ctrl_info = queue_group->ctrl_info;
3997
3998         if (!pqi_is_valid_irq(ctrl_info))
3999                 return IRQ_NONE;
4000
4001         num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
4002         if (num_io_responses_handled < 0)
4003                 goto out;
4004
4005         if (irq == ctrl_info->event_irq) {
4006                 num_events_handled = pqi_process_event_intr(ctrl_info);
4007                 if (num_events_handled < 0)
4008                         goto out;
4009         } else {
4010                 num_events_handled = 0;
4011         }
4012
4013         if (num_io_responses_handled + num_events_handled > 0)
4014                 atomic_inc(&ctrl_info->num_interrupts);
4015
4016         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
4017         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
4018
4019 out:
4020         return IRQ_HANDLED;
4021 }
4022
4023 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
4024 {
4025         struct pci_dev *pci_dev = ctrl_info->pci_dev;
4026         int i;
4027         int rc;
4028
4029         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
4030
4031         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
4032                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
4033                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
4034                 if (rc) {
4035                         dev_err(&pci_dev->dev,
4036                                 "irq %u init failed with error %d\n",
4037                                 pci_irq_vector(pci_dev, i), rc);
4038                         return rc;
4039                 }
4040                 ctrl_info->num_msix_vectors_initialized++;
4041         }
4042
4043         return 0;
4044 }
4045
4046 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
4047 {
4048         int i;
4049
4050         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
4051                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
4052                         &ctrl_info->queue_groups[i]);
4053
4054         ctrl_info->num_msix_vectors_initialized = 0;
4055 }
4056
4057 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4058 {
4059         int num_vectors_enabled;
4060         unsigned int flags = PCI_IRQ_MSIX;
4061
4062         if (!pqi_disable_managed_interrupts)
4063                 flags |= PCI_IRQ_AFFINITY;
4064
4065         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
4066                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
4067                         flags);
4068         if (num_vectors_enabled < 0) {
4069                 dev_err(&ctrl_info->pci_dev->dev,
4070                         "MSI-X init failed with error %d\n",
4071                         num_vectors_enabled);
4072                 return num_vectors_enabled;
4073         }
4074
4075         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
4076         ctrl_info->irq_mode = IRQ_MODE_MSIX;
4077         return 0;
4078 }
4079
4080 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4081 {
4082         if (ctrl_info->num_msix_vectors_enabled) {
4083                 pci_free_irq_vectors(ctrl_info->pci_dev);
4084                 ctrl_info->num_msix_vectors_enabled = 0;
4085         }
4086 }
4087
4088 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
4089 {
4090         unsigned int i;
4091         size_t alloc_length;
4092         size_t element_array_length_per_iq;
4093         size_t element_array_length_per_oq;
4094         void *element_array;
4095         void __iomem *next_queue_index;
4096         void *aligned_pointer;
4097         unsigned int num_inbound_queues;
4098         unsigned int num_outbound_queues;
4099         unsigned int num_queue_indexes;
4100         struct pqi_queue_group *queue_group;
4101
4102         element_array_length_per_iq =
4103                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
4104                 ctrl_info->num_elements_per_iq;
4105         element_array_length_per_oq =
4106                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
4107                 ctrl_info->num_elements_per_oq;
4108         num_inbound_queues = ctrl_info->num_queue_groups * 2;
4109         num_outbound_queues = ctrl_info->num_queue_groups;
4110         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
4111
4112         aligned_pointer = NULL;
4113
4114         for (i = 0; i < num_inbound_queues; i++) {
4115                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4116                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4117                 aligned_pointer += element_array_length_per_iq;
4118         }
4119
4120         for (i = 0; i < num_outbound_queues; i++) {
4121                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4122                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4123                 aligned_pointer += element_array_length_per_oq;
4124         }
4125
4126         aligned_pointer = PTR_ALIGN(aligned_pointer,
4127                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4128         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4129                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4130
4131         for (i = 0; i < num_queue_indexes; i++) {
4132                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4133                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4134                 aligned_pointer += sizeof(pqi_index_t);
4135         }
4136
4137         alloc_length = (size_t)aligned_pointer +
4138                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4139
4140         alloc_length += PQI_EXTRA_SGL_MEMORY;
4141
4142         ctrl_info->queue_memory_base =
4143                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4144                                    &ctrl_info->queue_memory_base_dma_handle,
4145                                    GFP_KERNEL);
4146
4147         if (!ctrl_info->queue_memory_base)
4148                 return -ENOMEM;
4149
4150         ctrl_info->queue_memory_length = alloc_length;
4151
4152         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
4153                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4154
4155         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4156                 queue_group = &ctrl_info->queue_groups[i];
4157                 queue_group->iq_element_array[RAID_PATH] = element_array;
4158                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
4159                         ctrl_info->queue_memory_base_dma_handle +
4160                                 (element_array - ctrl_info->queue_memory_base);
4161                 element_array += element_array_length_per_iq;
4162                 element_array = PTR_ALIGN(element_array,
4163                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4164                 queue_group->iq_element_array[AIO_PATH] = element_array;
4165                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
4166                         ctrl_info->queue_memory_base_dma_handle +
4167                         (element_array - ctrl_info->queue_memory_base);
4168                 element_array += element_array_length_per_iq;
4169                 element_array = PTR_ALIGN(element_array,
4170                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4171         }
4172
4173         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4174                 queue_group = &ctrl_info->queue_groups[i];
4175                 queue_group->oq_element_array = element_array;
4176                 queue_group->oq_element_array_bus_addr =
4177                         ctrl_info->queue_memory_base_dma_handle +
4178                         (element_array - ctrl_info->queue_memory_base);
4179                 element_array += element_array_length_per_oq;
4180                 element_array = PTR_ALIGN(element_array,
4181                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4182         }
4183
4184         ctrl_info->event_queue.oq_element_array = element_array;
4185         ctrl_info->event_queue.oq_element_array_bus_addr =
4186                 ctrl_info->queue_memory_base_dma_handle +
4187                 (element_array - ctrl_info->queue_memory_base);
4188         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4189                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4190
4191         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
4192                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
4193
4194         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4195                 queue_group = &ctrl_info->queue_groups[i];
4196                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
4197                 queue_group->iq_ci_bus_addr[RAID_PATH] =
4198                         ctrl_info->queue_memory_base_dma_handle +
4199                         (next_queue_index -
4200                         (void __iomem *)ctrl_info->queue_memory_base);
4201                 next_queue_index += sizeof(pqi_index_t);
4202                 next_queue_index = PTR_ALIGN(next_queue_index,
4203                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4204                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
4205                 queue_group->iq_ci_bus_addr[AIO_PATH] =
4206                         ctrl_info->queue_memory_base_dma_handle +
4207                         (next_queue_index -
4208                         (void __iomem *)ctrl_info->queue_memory_base);
4209                 next_queue_index += sizeof(pqi_index_t);
4210                 next_queue_index = PTR_ALIGN(next_queue_index,
4211                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4212                 queue_group->oq_pi = next_queue_index;
4213                 queue_group->oq_pi_bus_addr =
4214                         ctrl_info->queue_memory_base_dma_handle +
4215                         (next_queue_index -
4216                         (void __iomem *)ctrl_info->queue_memory_base);
4217                 next_queue_index += sizeof(pqi_index_t);
4218                 next_queue_index = PTR_ALIGN(next_queue_index,
4219                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4220         }
4221
4222         ctrl_info->event_queue.oq_pi = next_queue_index;
4223         ctrl_info->event_queue.oq_pi_bus_addr =
4224                 ctrl_info->queue_memory_base_dma_handle +
4225                 (next_queue_index -
4226                 (void __iomem *)ctrl_info->queue_memory_base);
4227
4228         return 0;
4229 }
4230
4231 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
4232 {
4233         unsigned int i;
4234         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4235         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4236
4237         /*
4238          * Initialize the backpointers to the controller structure in
4239          * each operational queue group structure.
4240          */
4241         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4242                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
4243
4244         /*
4245          * Assign IDs to all operational queues.  Note that the IDs
4246          * assigned to operational IQs are independent of the IDs
4247          * assigned to operational OQs.
4248          */
4249         ctrl_info->event_queue.oq_id = next_oq_id++;
4250         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4251                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
4252                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
4253                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
4254         }
4255
4256         /*
4257          * Assign MSI-X table entry indexes to all queues.  Note that the
4258          * interrupt for the event queue is shared with the first queue group.
4259          */
4260         ctrl_info->event_queue.int_msg_num = 0;
4261         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4262                 ctrl_info->queue_groups[i].int_msg_num = i;
4263
4264         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4265                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
4266                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
4267                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
4268                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
4269         }
4270 }
4271
4272 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
4273 {
4274         size_t alloc_length;
4275         struct pqi_admin_queues_aligned *admin_queues_aligned;
4276         struct pqi_admin_queues *admin_queues;
4277
4278         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
4279                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4280
4281         ctrl_info->admin_queue_memory_base =
4282                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4283                                    &ctrl_info->admin_queue_memory_base_dma_handle,
4284                                    GFP_KERNEL);
4285
4286         if (!ctrl_info->admin_queue_memory_base)
4287                 return -ENOMEM;
4288
4289         ctrl_info->admin_queue_memory_length = alloc_length;
4290
4291         admin_queues = &ctrl_info->admin_queues;
4292         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
4293                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4294         admin_queues->iq_element_array =
4295                 &admin_queues_aligned->iq_element_array;
4296         admin_queues->oq_element_array =
4297                 &admin_queues_aligned->oq_element_array;
4298         admin_queues->iq_ci =
4299                 (pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
4300         admin_queues->oq_pi =
4301                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
4302
4303         admin_queues->iq_element_array_bus_addr =
4304                 ctrl_info->admin_queue_memory_base_dma_handle +
4305                 (admin_queues->iq_element_array -
4306                 ctrl_info->admin_queue_memory_base);
4307         admin_queues->oq_element_array_bus_addr =
4308                 ctrl_info->admin_queue_memory_base_dma_handle +
4309                 (admin_queues->oq_element_array -
4310                 ctrl_info->admin_queue_memory_base);
4311         admin_queues->iq_ci_bus_addr =
4312                 ctrl_info->admin_queue_memory_base_dma_handle +
4313                 ((void __iomem *)admin_queues->iq_ci -
4314                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4315         admin_queues->oq_pi_bus_addr =
4316                 ctrl_info->admin_queue_memory_base_dma_handle +
4317                 ((void __iomem *)admin_queues->oq_pi -
4318                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4319
4320         return 0;
4321 }
4322
4323 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
4324 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
4325
4326 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
4327 {
4328         struct pqi_device_registers __iomem *pqi_registers;
4329         struct pqi_admin_queues *admin_queues;
4330         unsigned long timeout;
4331         u8 status;
4332         u32 reg;
4333
4334         pqi_registers = ctrl_info->pqi_registers;
4335         admin_queues = &ctrl_info->admin_queues;
4336
4337         writeq((u64)admin_queues->iq_element_array_bus_addr,
4338                 &pqi_registers->admin_iq_element_array_addr);
4339         writeq((u64)admin_queues->oq_element_array_bus_addr,
4340                 &pqi_registers->admin_oq_element_array_addr);
4341         writeq((u64)admin_queues->iq_ci_bus_addr,
4342                 &pqi_registers->admin_iq_ci_addr);
4343         writeq((u64)admin_queues->oq_pi_bus_addr,
4344                 &pqi_registers->admin_oq_pi_addr);
4345
4346         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
4347                 (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
4348                 (admin_queues->int_msg_num << 16);
4349         writel(reg, &pqi_registers->admin_iq_num_elements);
4350
4351         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
4352                 &pqi_registers->function_and_status_code);
4353
4354         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
4355         while (1) {
4356                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
4357                 status = readb(&pqi_registers->function_and_status_code);
4358                 if (status == PQI_STATUS_IDLE)
4359                         break;
4360                 if (time_after(jiffies, timeout))
4361                         return -ETIMEDOUT;
4362         }
4363
4364         /*
4365          * The offset registers are not initialized to the correct
4366          * offsets until *after* the create admin queue pair command
4367          * completes successfully.
4368          */
4369         admin_queues->iq_pi = ctrl_info->iomem_base +
4370                 PQI_DEVICE_REGISTERS_OFFSET +
4371                 readq(&pqi_registers->admin_iq_pi_offset);
4372         admin_queues->oq_ci = ctrl_info->iomem_base +
4373                 PQI_DEVICE_REGISTERS_OFFSET +
4374                 readq(&pqi_registers->admin_oq_ci_offset);
4375
4376         return 0;
4377 }
4378
4379 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
4380         struct pqi_general_admin_request *request)
4381 {
4382         struct pqi_admin_queues *admin_queues;
4383         void *next_element;
4384         pqi_index_t iq_pi;
4385
4386         admin_queues = &ctrl_info->admin_queues;
4387         iq_pi = admin_queues->iq_pi_copy;
4388
4389         next_element = admin_queues->iq_element_array +
4390                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
4391
4392         memcpy(next_element, request, sizeof(*request));
4393
4394         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
4395         admin_queues->iq_pi_copy = iq_pi;
4396
4397         /*
4398          * This write notifies the controller that an IU is available to be
4399          * processed.
4400          */
4401         writel(iq_pi, admin_queues->iq_pi);
4402 }
4403
4404 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
4405
4406 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
4407         struct pqi_general_admin_response *response)
4408 {
4409         struct pqi_admin_queues *admin_queues;
4410         pqi_index_t oq_pi;
4411         pqi_index_t oq_ci;
4412         unsigned long timeout;
4413
4414         admin_queues = &ctrl_info->admin_queues;
4415         oq_ci = admin_queues->oq_ci_copy;
4416
4417         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
4418
4419         while (1) {
4420                 oq_pi = readl(admin_queues->oq_pi);
4421                 if (oq_pi != oq_ci)
4422                         break;
4423                 if (time_after(jiffies, timeout)) {
4424                         dev_err(&ctrl_info->pci_dev->dev,
4425                                 "timed out waiting for admin response\n");
4426                         return -ETIMEDOUT;
4427                 }
4428                 if (!sis_is_firmware_running(ctrl_info))
4429                         return -ENXIO;
4430                 usleep_range(1000, 2000);
4431         }
4432
4433         memcpy(response, admin_queues->oq_element_array +
4434                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
4435
4436         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
4437         admin_queues->oq_ci_copy = oq_ci;
4438         writel(oq_ci, admin_queues->oq_ci);
4439
4440         return 0;
4441 }
4442
4443 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
4444         struct pqi_queue_group *queue_group, enum pqi_io_path path,
4445         struct pqi_io_request *io_request)
4446 {
4447         struct pqi_io_request *next;
4448         void *next_element;
4449         pqi_index_t iq_pi;
4450         pqi_index_t iq_ci;
4451         size_t iu_length;
4452         unsigned long flags;
4453         unsigned int num_elements_needed;
4454         unsigned int num_elements_to_end_of_queue;
4455         size_t copy_count;
4456         struct pqi_iu_header *request;
4457
4458         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
4459
4460         if (io_request) {
4461                 io_request->queue_group = queue_group;
4462                 list_add_tail(&io_request->request_list_entry,
4463                         &queue_group->request_list[path]);
4464         }
4465
4466         iq_pi = queue_group->iq_pi_copy[path];
4467
4468         list_for_each_entry_safe(io_request, next,
4469                 &queue_group->request_list[path], request_list_entry) {
4470
4471                 request = io_request->iu;
4472
4473                 iu_length = get_unaligned_le16(&request->iu_length) +
4474                         PQI_REQUEST_HEADER_LENGTH;
4475                 num_elements_needed =
4476                         DIV_ROUND_UP(iu_length,
4477                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4478
4479                 iq_ci = readl(queue_group->iq_ci[path]);
4480
4481                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
4482                         ctrl_info->num_elements_per_iq))
4483                         break;
4484
4485                 put_unaligned_le16(queue_group->oq_id,
4486                         &request->response_queue_id);
4487
4488                 next_element = queue_group->iq_element_array[path] +
4489                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4490
4491                 num_elements_to_end_of_queue =
4492                         ctrl_info->num_elements_per_iq - iq_pi;
4493
4494                 if (num_elements_needed <= num_elements_to_end_of_queue) {
4495                         memcpy(next_element, request, iu_length);
4496                 } else {
4497                         copy_count = num_elements_to_end_of_queue *
4498                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4499                         memcpy(next_element, request, copy_count);
4500                         memcpy(queue_group->iq_element_array[path],
4501                                 (u8 *)request + copy_count,
4502                                 iu_length - copy_count);
4503                 }
4504
4505                 iq_pi = (iq_pi + num_elements_needed) %
4506                         ctrl_info->num_elements_per_iq;
4507
4508                 list_del(&io_request->request_list_entry);
4509         }
4510
4511         if (iq_pi != queue_group->iq_pi_copy[path]) {
4512                 queue_group->iq_pi_copy[path] = iq_pi;
4513                 /*
4514                  * This write notifies the controller that one or more IUs are
4515                  * available to be processed.
4516                  */
4517                 writel(iq_pi, queue_group->iq_pi[path]);
4518         }
4519
4520         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
4521 }
4522
4523 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
4524
4525 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
4526         struct completion *wait)
4527 {
4528         int rc;
4529
4530         while (1) {
4531                 if (wait_for_completion_io_timeout(wait,
4532                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
4533                         rc = 0;
4534                         break;
4535                 }
4536
4537                 pqi_check_ctrl_health(ctrl_info);
4538                 if (pqi_ctrl_offline(ctrl_info)) {
4539                         rc = -ENXIO;
4540                         break;
4541                 }
4542         }
4543
4544         return rc;
4545 }
4546
4547 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
4548         void *context)
4549 {
4550         struct completion *waiting = context;
4551
4552         complete(waiting);
4553 }
4554
4555 static int pqi_process_raid_io_error_synchronous(
4556         struct pqi_raid_error_info *error_info)
4557 {
4558         int rc = -EIO;
4559
4560         switch (error_info->data_out_result) {
4561         case PQI_DATA_IN_OUT_GOOD:
4562                 if (error_info->status == SAM_STAT_GOOD)
4563                         rc = 0;
4564                 break;
4565         case PQI_DATA_IN_OUT_UNDERFLOW:
4566                 if (error_info->status == SAM_STAT_GOOD ||
4567                         error_info->status == SAM_STAT_CHECK_CONDITION)
4568                         rc = 0;
4569                 break;
4570         case PQI_DATA_IN_OUT_ABORTED:
4571                 rc = PQI_CMD_STATUS_ABORTED;
4572                 break;
4573         }
4574
4575         return rc;
4576 }
4577
4578 static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
4579 {
4580         return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
4581 }
4582
4583 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4584         struct pqi_iu_header *request, unsigned int flags,
4585         struct pqi_raid_error_info *error_info)
4586 {
4587         int rc = 0;
4588         struct pqi_io_request *io_request;
4589         size_t iu_length;
4590         DECLARE_COMPLETION_ONSTACK(wait);
4591
4592         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4593                 if (down_interruptible(&ctrl_info->sync_request_sem))
4594                         return -ERESTARTSYS;
4595         } else {
4596                 down(&ctrl_info->sync_request_sem);
4597         }
4598
4599         pqi_ctrl_busy(ctrl_info);
4600         /*
4601          * Wait for other admin queue updates such as;
4602          * config table changes, OFA memory updates, ...
4603          */
4604         if (pqi_is_blockable_request(request))
4605                 pqi_wait_if_ctrl_blocked(ctrl_info);
4606
4607         if (pqi_ctrl_offline(ctrl_info)) {
4608                 rc = -ENXIO;
4609                 goto out;
4610         }
4611
4612         io_request = pqi_alloc_io_request(ctrl_info, NULL);
4613
4614         put_unaligned_le16(io_request->index,
4615                 &(((struct pqi_raid_path_request *)request)->request_id));
4616
4617         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4618                 ((struct pqi_raid_path_request *)request)->error_index =
4619                         ((struct pqi_raid_path_request *)request)->request_id;
4620
4621         iu_length = get_unaligned_le16(&request->iu_length) +
4622                 PQI_REQUEST_HEADER_LENGTH;
4623         memcpy(io_request->iu, request, iu_length);
4624
4625         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4626         io_request->context = &wait;
4627
4628         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4629                 io_request);
4630
4631         pqi_wait_for_completion_io(ctrl_info, &wait);
4632
4633         if (error_info) {
4634                 if (io_request->error_info)
4635                         memcpy(error_info, io_request->error_info, sizeof(*error_info));
4636                 else
4637                         memset(error_info, 0, sizeof(*error_info));
4638         } else if (rc == 0 && io_request->error_info) {
4639                 rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
4640         }
4641
4642         pqi_free_io_request(io_request);
4643
4644 out:
4645         pqi_ctrl_unbusy(ctrl_info);
4646         up(&ctrl_info->sync_request_sem);
4647
4648         return rc;
4649 }
4650
4651 static int pqi_validate_admin_response(
4652         struct pqi_general_admin_response *response, u8 expected_function_code)
4653 {
4654         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4655                 return -EINVAL;
4656
4657         if (get_unaligned_le16(&response->header.iu_length) !=
4658                 PQI_GENERAL_ADMIN_IU_LENGTH)
4659                 return -EINVAL;
4660
4661         if (response->function_code != expected_function_code)
4662                 return -EINVAL;
4663
4664         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4665                 return -EINVAL;
4666
4667         return 0;
4668 }
4669
4670 static int pqi_submit_admin_request_synchronous(
4671         struct pqi_ctrl_info *ctrl_info,
4672         struct pqi_general_admin_request *request,
4673         struct pqi_general_admin_response *response)
4674 {
4675         int rc;
4676
4677         pqi_submit_admin_request(ctrl_info, request);
4678
4679         rc = pqi_poll_for_admin_response(ctrl_info, response);
4680
4681         if (rc == 0)
4682                 rc = pqi_validate_admin_response(response, request->function_code);
4683
4684         return rc;
4685 }
4686
4687 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4688 {
4689         int rc;
4690         struct pqi_general_admin_request request;
4691         struct pqi_general_admin_response response;
4692         struct pqi_device_capability *capability;
4693         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4694
4695         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4696         if (!capability)
4697                 return -ENOMEM;
4698
4699         memset(&request, 0, sizeof(request));
4700
4701         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4702         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4703                 &request.header.iu_length);
4704         request.function_code =
4705                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4706         put_unaligned_le32(sizeof(*capability),
4707                 &request.data.report_device_capability.buffer_length);
4708
4709         rc = pqi_map_single(ctrl_info->pci_dev,
4710                 &request.data.report_device_capability.sg_descriptor,
4711                 capability, sizeof(*capability),
4712                 DMA_FROM_DEVICE);
4713         if (rc)
4714                 goto out;
4715
4716         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
4717
4718         pqi_pci_unmap(ctrl_info->pci_dev,
4719                 &request.data.report_device_capability.sg_descriptor, 1,
4720                 DMA_FROM_DEVICE);
4721
4722         if (rc)
4723                 goto out;
4724
4725         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4726                 rc = -EIO;
4727                 goto out;
4728         }
4729
4730         ctrl_info->max_inbound_queues =
4731                 get_unaligned_le16(&capability->max_inbound_queues);
4732         ctrl_info->max_elements_per_iq =
4733                 get_unaligned_le16(&capability->max_elements_per_iq);
4734         ctrl_info->max_iq_element_length =
4735                 get_unaligned_le16(&capability->max_iq_element_length)
4736                 * 16;
4737         ctrl_info->max_outbound_queues =
4738                 get_unaligned_le16(&capability->max_outbound_queues);
4739         ctrl_info->max_elements_per_oq =
4740                 get_unaligned_le16(&capability->max_elements_per_oq);
4741         ctrl_info->max_oq_element_length =
4742                 get_unaligned_le16(&capability->max_oq_element_length)
4743                 * 16;
4744
4745         sop_iu_layer_descriptor =
4746                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4747
4748         ctrl_info->max_inbound_iu_length_per_firmware =
4749                 get_unaligned_le16(
4750                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4751         ctrl_info->inbound_spanning_supported =
4752                 sop_iu_layer_descriptor->inbound_spanning_supported;
4753         ctrl_info->outbound_spanning_supported =
4754                 sop_iu_layer_descriptor->outbound_spanning_supported;
4755
4756 out:
4757         kfree(capability);
4758
4759         return rc;
4760 }
4761
4762 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4763 {
4764         if (ctrl_info->max_iq_element_length <
4765                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4766                 dev_err(&ctrl_info->pci_dev->dev,
4767                         "max. inbound queue element length of %d is less than the required length of %d\n",
4768                         ctrl_info->max_iq_element_length,
4769                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4770                 return -EINVAL;
4771         }
4772
4773         if (ctrl_info->max_oq_element_length <
4774                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4775                 dev_err(&ctrl_info->pci_dev->dev,
4776                         "max. outbound queue element length of %d is less than the required length of %d\n",
4777                         ctrl_info->max_oq_element_length,
4778                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4779                 return -EINVAL;
4780         }
4781
4782         if (ctrl_info->max_inbound_iu_length_per_firmware <
4783                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4784                 dev_err(&ctrl_info->pci_dev->dev,
4785                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4786                         ctrl_info->max_inbound_iu_length_per_firmware,
4787                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4788                 return -EINVAL;
4789         }
4790
4791         if (!ctrl_info->inbound_spanning_supported) {
4792                 dev_err(&ctrl_info->pci_dev->dev,
4793                         "the controller does not support inbound spanning\n");
4794                 return -EINVAL;
4795         }
4796
4797         if (ctrl_info->outbound_spanning_supported) {
4798                 dev_err(&ctrl_info->pci_dev->dev,
4799                         "the controller supports outbound spanning but this driver does not\n");
4800                 return -EINVAL;
4801         }
4802
4803         return 0;
4804 }
4805
4806 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4807 {
4808         int rc;
4809         struct pqi_event_queue *event_queue;
4810         struct pqi_general_admin_request request;
4811         struct pqi_general_admin_response response;
4812
4813         event_queue = &ctrl_info->event_queue;
4814
4815         /*
4816          * Create OQ (Outbound Queue - device to host queue) to dedicate
4817          * to events.
4818          */
4819         memset(&request, 0, sizeof(request));
4820         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4821         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4822                 &request.header.iu_length);
4823         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4824         put_unaligned_le16(event_queue->oq_id,
4825                 &request.data.create_operational_oq.queue_id);
4826         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4827                 &request.data.create_operational_oq.element_array_addr);
4828         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4829                 &request.data.create_operational_oq.pi_addr);
4830         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4831                 &request.data.create_operational_oq.num_elements);
4832         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4833                 &request.data.create_operational_oq.element_length);
4834         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4835         put_unaligned_le16(event_queue->int_msg_num,
4836                 &request.data.create_operational_oq.int_msg_num);
4837
4838         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4839                 &response);
4840         if (rc)
4841                 return rc;
4842
4843         event_queue->oq_ci = ctrl_info->iomem_base +
4844                 PQI_DEVICE_REGISTERS_OFFSET +
4845                 get_unaligned_le64(
4846                         &response.data.create_operational_oq.oq_ci_offset);
4847
4848         return 0;
4849 }
4850
4851 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4852         unsigned int group_number)
4853 {
4854         int rc;
4855         struct pqi_queue_group *queue_group;
4856         struct pqi_general_admin_request request;
4857         struct pqi_general_admin_response response;
4858
4859         queue_group = &ctrl_info->queue_groups[group_number];
4860
4861         /*
4862          * Create IQ (Inbound Queue - host to device queue) for
4863          * RAID path.
4864          */
4865         memset(&request, 0, sizeof(request));
4866         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4867         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4868                 &request.header.iu_length);
4869         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4870         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4871                 &request.data.create_operational_iq.queue_id);
4872         put_unaligned_le64(
4873                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4874                 &request.data.create_operational_iq.element_array_addr);
4875         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4876                 &request.data.create_operational_iq.ci_addr);
4877         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4878                 &request.data.create_operational_iq.num_elements);
4879         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4880                 &request.data.create_operational_iq.element_length);
4881         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4882
4883         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4884                 &response);
4885         if (rc) {
4886                 dev_err(&ctrl_info->pci_dev->dev,
4887                         "error creating inbound RAID queue\n");
4888                 return rc;
4889         }
4890
4891         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4892                 PQI_DEVICE_REGISTERS_OFFSET +
4893                 get_unaligned_le64(
4894                         &response.data.create_operational_iq.iq_pi_offset);
4895
4896         /*
4897          * Create IQ (Inbound Queue - host to device queue) for
4898          * Advanced I/O (AIO) path.
4899          */
4900         memset(&request, 0, sizeof(request));
4901         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4902         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4903                 &request.header.iu_length);
4904         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4905         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4906                 &request.data.create_operational_iq.queue_id);
4907         put_unaligned_le64((u64)queue_group->
4908                 iq_element_array_bus_addr[AIO_PATH],
4909                 &request.data.create_operational_iq.element_array_addr);
4910         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4911                 &request.data.create_operational_iq.ci_addr);
4912         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4913                 &request.data.create_operational_iq.num_elements);
4914         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4915                 &request.data.create_operational_iq.element_length);
4916         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4917
4918         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4919                 &response);
4920         if (rc) {
4921                 dev_err(&ctrl_info->pci_dev->dev,
4922                         "error creating inbound AIO queue\n");
4923                 return rc;
4924         }
4925
4926         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4927                 PQI_DEVICE_REGISTERS_OFFSET +
4928                 get_unaligned_le64(
4929                         &response.data.create_operational_iq.iq_pi_offset);
4930
4931         /*
4932          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4933          * assumed to be for RAID path I/O unless we change the queue's
4934          * property.
4935          */
4936         memset(&request, 0, sizeof(request));
4937         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4938         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4939                 &request.header.iu_length);
4940         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4941         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4942                 &request.data.change_operational_iq_properties.queue_id);
4943         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4944                 &request.data.change_operational_iq_properties.vendor_specific);
4945
4946         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4947                 &response);
4948         if (rc) {
4949                 dev_err(&ctrl_info->pci_dev->dev,
4950                         "error changing queue property\n");
4951                 return rc;
4952         }
4953
4954         /*
4955          * Create OQ (Outbound Queue - device to host queue).
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_CREATE_OQ;
4962         put_unaligned_le16(queue_group->oq_id,
4963                 &request.data.create_operational_oq.queue_id);
4964         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4965                 &request.data.create_operational_oq.element_array_addr);
4966         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4967                 &request.data.create_operational_oq.pi_addr);
4968         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4969                 &request.data.create_operational_oq.num_elements);
4970         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4971                 &request.data.create_operational_oq.element_length);
4972         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4973         put_unaligned_le16(queue_group->int_msg_num,
4974                 &request.data.create_operational_oq.int_msg_num);
4975
4976         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4977                 &response);
4978         if (rc) {
4979                 dev_err(&ctrl_info->pci_dev->dev,
4980                         "error creating outbound queue\n");
4981                 return rc;
4982         }
4983
4984         queue_group->oq_ci = ctrl_info->iomem_base +
4985                 PQI_DEVICE_REGISTERS_OFFSET +
4986                 get_unaligned_le64(
4987                         &response.data.create_operational_oq.oq_ci_offset);
4988
4989         return 0;
4990 }
4991
4992 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4993 {
4994         int rc;
4995         unsigned int i;
4996
4997         rc = pqi_create_event_queue(ctrl_info);
4998         if (rc) {
4999                 dev_err(&ctrl_info->pci_dev->dev,
5000                         "error creating event queue\n");
5001                 return rc;
5002         }
5003
5004         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5005                 rc = pqi_create_queue_group(ctrl_info, i);
5006                 if (rc) {
5007                         dev_err(&ctrl_info->pci_dev->dev,
5008                                 "error creating queue group number %u/%u\n",
5009                                 i, ctrl_info->num_queue_groups);
5010                         return rc;
5011                 }
5012         }
5013
5014         return 0;
5015 }
5016
5017 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
5018         struct_size((struct pqi_event_config *)0, descriptors, PQI_MAX_EVENT_DESCRIPTORS)
5019
5020 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
5021         bool enable_events)
5022 {
5023         int rc;
5024         unsigned int i;
5025         struct pqi_event_config *event_config;
5026         struct pqi_event_descriptor *event_descriptor;
5027         struct pqi_general_management_request request;
5028
5029         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5030                 GFP_KERNEL);
5031         if (!event_config)
5032                 return -ENOMEM;
5033
5034         memset(&request, 0, sizeof(request));
5035
5036         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
5037         put_unaligned_le16(offsetof(struct pqi_general_management_request,
5038                 data.report_event_configuration.sg_descriptors[1]) -
5039                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5040         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5041                 &request.data.report_event_configuration.buffer_length);
5042
5043         rc = pqi_map_single(ctrl_info->pci_dev,
5044                 request.data.report_event_configuration.sg_descriptors,
5045                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5046                 DMA_FROM_DEVICE);
5047         if (rc)
5048                 goto out;
5049
5050         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5051
5052         pqi_pci_unmap(ctrl_info->pci_dev,
5053                 request.data.report_event_configuration.sg_descriptors, 1,
5054                 DMA_FROM_DEVICE);
5055
5056         if (rc)
5057                 goto out;
5058
5059         for (i = 0; i < event_config->num_event_descriptors; i++) {
5060                 event_descriptor = &event_config->descriptors[i];
5061                 if (enable_events &&
5062                         pqi_is_supported_event(event_descriptor->event_type))
5063                                 put_unaligned_le16(ctrl_info->event_queue.oq_id,
5064                                         &event_descriptor->oq_id);
5065                 else
5066                         put_unaligned_le16(0, &event_descriptor->oq_id);
5067         }
5068
5069         memset(&request, 0, sizeof(request));
5070
5071         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
5072         put_unaligned_le16(offsetof(struct pqi_general_management_request,
5073                 data.report_event_configuration.sg_descriptors[1]) -
5074                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5075         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5076                 &request.data.report_event_configuration.buffer_length);
5077
5078         rc = pqi_map_single(ctrl_info->pci_dev,
5079                 request.data.report_event_configuration.sg_descriptors,
5080                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5081                 DMA_TO_DEVICE);
5082         if (rc)
5083                 goto out;
5084
5085         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5086
5087         pqi_pci_unmap(ctrl_info->pci_dev,
5088                 request.data.report_event_configuration.sg_descriptors, 1,
5089                 DMA_TO_DEVICE);
5090
5091 out:
5092         kfree(event_config);
5093
5094         return rc;
5095 }
5096
5097 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
5098 {
5099         return pqi_configure_events(ctrl_info, true);
5100 }
5101
5102 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
5103 {
5104         unsigned int i;
5105         struct device *dev;
5106         size_t sg_chain_buffer_length;
5107         struct pqi_io_request *io_request;
5108
5109         if (!ctrl_info->io_request_pool)
5110                 return;
5111
5112         dev = &ctrl_info->pci_dev->dev;
5113         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5114         io_request = ctrl_info->io_request_pool;
5115
5116         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5117                 kfree(io_request->iu);
5118                 if (!io_request->sg_chain_buffer)
5119                         break;
5120                 dma_free_coherent(dev, sg_chain_buffer_length,
5121                         io_request->sg_chain_buffer,
5122                         io_request->sg_chain_buffer_dma_handle);
5123                 io_request++;
5124         }
5125
5126         kfree(ctrl_info->io_request_pool);
5127         ctrl_info->io_request_pool = NULL;
5128 }
5129
5130 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
5131 {
5132         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
5133                                      ctrl_info->error_buffer_length,
5134                                      &ctrl_info->error_buffer_dma_handle,
5135                                      GFP_KERNEL);
5136         if (!ctrl_info->error_buffer)
5137                 return -ENOMEM;
5138
5139         return 0;
5140 }
5141
5142 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
5143 {
5144         unsigned int i;
5145         void *sg_chain_buffer;
5146         size_t sg_chain_buffer_length;
5147         dma_addr_t sg_chain_buffer_dma_handle;
5148         struct device *dev;
5149         struct pqi_io_request *io_request;
5150
5151         ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
5152                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
5153
5154         if (!ctrl_info->io_request_pool) {
5155                 dev_err(&ctrl_info->pci_dev->dev,
5156                         "failed to allocate I/O request pool\n");
5157                 goto error;
5158         }
5159
5160         dev = &ctrl_info->pci_dev->dev;
5161         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5162         io_request = ctrl_info->io_request_pool;
5163
5164         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5165                 io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
5166
5167                 if (!io_request->iu) {
5168                         dev_err(&ctrl_info->pci_dev->dev,
5169                                 "failed to allocate IU buffers\n");
5170                         goto error;
5171                 }
5172
5173                 sg_chain_buffer = dma_alloc_coherent(dev,
5174                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
5175                         GFP_KERNEL);
5176
5177                 if (!sg_chain_buffer) {
5178                         dev_err(&ctrl_info->pci_dev->dev,
5179                                 "failed to allocate PQI scatter-gather chain buffers\n");
5180                         goto error;
5181                 }
5182
5183                 io_request->index = i;
5184                 io_request->sg_chain_buffer = sg_chain_buffer;
5185                 io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
5186                 io_request++;
5187         }
5188
5189         return 0;
5190
5191 error:
5192         pqi_free_all_io_requests(ctrl_info);
5193
5194         return -ENOMEM;
5195 }
5196
5197 /*
5198  * Calculate required resources that are sized based on max. outstanding
5199  * requests and max. transfer size.
5200  */
5201
5202 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
5203 {
5204         u32 max_transfer_size;
5205         u32 max_sg_entries;
5206
5207         ctrl_info->scsi_ml_can_queue =
5208                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
5209         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
5210
5211         ctrl_info->error_buffer_length =
5212                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
5213
5214         if (reset_devices)
5215                 max_transfer_size = min(ctrl_info->max_transfer_size,
5216                         PQI_MAX_TRANSFER_SIZE_KDUMP);
5217         else
5218                 max_transfer_size = min(ctrl_info->max_transfer_size,
5219                         PQI_MAX_TRANSFER_SIZE);
5220
5221         max_sg_entries = max_transfer_size / PAGE_SIZE;
5222
5223         /* +1 to cover when the buffer is not page-aligned. */
5224         max_sg_entries++;
5225
5226         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
5227
5228         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
5229
5230         ctrl_info->sg_chain_buffer_length =
5231                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
5232                 PQI_EXTRA_SGL_MEMORY;
5233         ctrl_info->sg_tablesize = max_sg_entries;
5234         ctrl_info->max_sectors = max_transfer_size / 512;
5235 }
5236
5237 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
5238 {
5239         int num_queue_groups;
5240         u16 num_elements_per_iq;
5241         u16 num_elements_per_oq;
5242
5243         if (reset_devices) {
5244                 num_queue_groups = 1;
5245         } else {
5246                 int num_cpus;
5247                 int max_queue_groups;
5248
5249                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
5250                         ctrl_info->max_outbound_queues - 1);
5251                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
5252
5253                 num_cpus = num_online_cpus();
5254                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
5255                 num_queue_groups = min(num_queue_groups, max_queue_groups);
5256         }
5257
5258         ctrl_info->num_queue_groups = num_queue_groups;
5259
5260         /*
5261          * Make sure that the max. inbound IU length is an even multiple
5262          * of our inbound element length.
5263          */
5264         ctrl_info->max_inbound_iu_length =
5265                 (ctrl_info->max_inbound_iu_length_per_firmware /
5266                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
5267                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
5268
5269         num_elements_per_iq =
5270                 (ctrl_info->max_inbound_iu_length /
5271                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
5272
5273         /* Add one because one element in each queue is unusable. */
5274         num_elements_per_iq++;
5275
5276         num_elements_per_iq = min(num_elements_per_iq,
5277                 ctrl_info->max_elements_per_iq);
5278
5279         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
5280         num_elements_per_oq = min(num_elements_per_oq,
5281                 ctrl_info->max_elements_per_oq);
5282
5283         ctrl_info->num_elements_per_iq = num_elements_per_iq;
5284         ctrl_info->num_elements_per_oq = num_elements_per_oq;
5285
5286         ctrl_info->max_sg_per_iu =
5287                 ((ctrl_info->max_inbound_iu_length -
5288                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5289                 sizeof(struct pqi_sg_descriptor)) +
5290                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
5291
5292         ctrl_info->max_sg_per_r56_iu =
5293                 ((ctrl_info->max_inbound_iu_length -
5294                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5295                 sizeof(struct pqi_sg_descriptor)) +
5296                 PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
5297 }
5298
5299 static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
5300         struct scatterlist *sg)
5301 {
5302         u64 address = (u64)sg_dma_address(sg);
5303         unsigned int length = sg_dma_len(sg);
5304
5305         put_unaligned_le64(address, &sg_descriptor->address);
5306         put_unaligned_le32(length, &sg_descriptor->length);
5307         put_unaligned_le32(0, &sg_descriptor->flags);
5308 }
5309
5310 static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
5311         struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
5312         int max_sg_per_iu, bool *chained)
5313 {
5314         int i;
5315         unsigned int num_sg_in_iu;
5316
5317         *chained = false;
5318         i = 0;
5319         num_sg_in_iu = 0;
5320         max_sg_per_iu--;        /* Subtract 1 to leave room for chain marker. */
5321
5322         while (1) {
5323                 pqi_set_sg_descriptor(sg_descriptor, sg);
5324                 if (!*chained)
5325                         num_sg_in_iu++;
5326                 i++;
5327                 if (i == sg_count)
5328                         break;
5329                 sg_descriptor++;
5330                 if (i == max_sg_per_iu) {
5331                         put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
5332                                 &sg_descriptor->address);
5333                         put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
5334                                 &sg_descriptor->length);
5335                         put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
5336                         *chained = true;
5337                         num_sg_in_iu++;
5338                         sg_descriptor = io_request->sg_chain_buffer;
5339                 }
5340                 sg = sg_next(sg);
5341         }
5342
5343         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
5344
5345         return num_sg_in_iu;
5346 }
5347
5348 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
5349         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
5350         struct pqi_io_request *io_request)
5351 {
5352         u16 iu_length;
5353         int sg_count;
5354         bool chained;
5355         unsigned int num_sg_in_iu;
5356         struct scatterlist *sg;
5357         struct pqi_sg_descriptor *sg_descriptor;
5358
5359         sg_count = scsi_dma_map(scmd);
5360         if (sg_count < 0)
5361                 return sg_count;
5362
5363         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5364                 PQI_REQUEST_HEADER_LENGTH;
5365
5366         if (sg_count == 0)
5367                 goto out;
5368
5369         sg = scsi_sglist(scmd);
5370         sg_descriptor = request->sg_descriptors;
5371
5372         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5373                 ctrl_info->max_sg_per_iu, &chained);
5374
5375         request->partial = chained;
5376         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5377
5378 out:
5379         put_unaligned_le16(iu_length, &request->header.iu_length);
5380
5381         return 0;
5382 }
5383
5384 static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
5385         struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
5386         struct pqi_io_request *io_request)
5387 {
5388         u16 iu_length;
5389         int sg_count;
5390         bool chained;
5391         unsigned int num_sg_in_iu;
5392         struct scatterlist *sg;
5393         struct pqi_sg_descriptor *sg_descriptor;
5394
5395         sg_count = scsi_dma_map(scmd);
5396         if (sg_count < 0)
5397                 return sg_count;
5398
5399         iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
5400                 PQI_REQUEST_HEADER_LENGTH;
5401         num_sg_in_iu = 0;
5402
5403         if (sg_count == 0)
5404                 goto out;
5405
5406         sg = scsi_sglist(scmd);
5407         sg_descriptor = request->sg_descriptors;
5408
5409         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5410                 ctrl_info->max_sg_per_iu, &chained);
5411
5412         request->partial = chained;
5413         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5414
5415 out:
5416         put_unaligned_le16(iu_length, &request->header.iu_length);
5417         request->num_sg_descriptors = num_sg_in_iu;
5418
5419         return 0;
5420 }
5421
5422 static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
5423         struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
5424         struct pqi_io_request *io_request)
5425 {
5426         u16 iu_length;
5427         int sg_count;
5428         bool chained;
5429         unsigned int num_sg_in_iu;
5430         struct scatterlist *sg;
5431         struct pqi_sg_descriptor *sg_descriptor;
5432
5433         sg_count = scsi_dma_map(scmd);
5434         if (sg_count < 0)
5435                 return sg_count;
5436
5437         iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
5438                 PQI_REQUEST_HEADER_LENGTH;
5439         num_sg_in_iu = 0;
5440
5441         if (sg_count != 0) {
5442                 sg = scsi_sglist(scmd);
5443                 sg_descriptor = request->sg_descriptors;
5444
5445                 num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5446                         ctrl_info->max_sg_per_r56_iu, &chained);
5447
5448                 request->partial = chained;
5449                 iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5450         }
5451
5452         put_unaligned_le16(iu_length, &request->header.iu_length);
5453         request->num_sg_descriptors = num_sg_in_iu;
5454
5455         return 0;
5456 }
5457
5458 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
5459         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
5460         struct pqi_io_request *io_request)
5461 {
5462         u16 iu_length;
5463         int sg_count;
5464         bool chained;
5465         unsigned int num_sg_in_iu;
5466         struct scatterlist *sg;
5467         struct pqi_sg_descriptor *sg_descriptor;
5468
5469         sg_count = scsi_dma_map(scmd);
5470         if (sg_count < 0)
5471                 return sg_count;
5472
5473         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
5474                 PQI_REQUEST_HEADER_LENGTH;
5475         num_sg_in_iu = 0;
5476
5477         if (sg_count == 0)
5478                 goto out;
5479
5480         sg = scsi_sglist(scmd);
5481         sg_descriptor = request->sg_descriptors;
5482
5483         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5484                 ctrl_info->max_sg_per_iu, &chained);
5485
5486         request->partial = chained;
5487         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5488
5489 out:
5490         put_unaligned_le16(iu_length, &request->header.iu_length);
5491         request->num_sg_descriptors = num_sg_in_iu;
5492
5493         return 0;
5494 }
5495
5496 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
5497         void *context)
5498 {
5499         struct scsi_cmnd *scmd;
5500
5501         scmd = io_request->scmd;
5502         pqi_free_io_request(io_request);
5503         scsi_dma_unmap(scmd);
5504         pqi_scsi_done(scmd);
5505 }
5506
5507 static int pqi_raid_submit_scsi_cmd_with_io_request(
5508         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
5509         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5510         struct pqi_queue_group *queue_group)
5511 {
5512         int rc;
5513         size_t cdb_length;
5514         struct pqi_raid_path_request *request;
5515
5516         io_request->io_complete_callback = pqi_raid_io_complete;
5517         io_request->scmd = scmd;
5518
5519         request = io_request->iu;
5520         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5521
5522         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5523         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5524         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5525         put_unaligned_le16(io_request->index, &request->request_id);
5526         request->error_index = request->request_id;
5527         memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
5528         request->ml_device_lun_number = (u8)scmd->device->lun;
5529
5530         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
5531         memcpy(request->cdb, scmd->cmnd, cdb_length);
5532
5533         switch (cdb_length) {
5534         case 6:
5535         case 10:
5536         case 12:
5537         case 16:
5538                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5539                 break;
5540         case 20:
5541                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
5542                 break;
5543         case 24:
5544                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
5545                 break;
5546         case 28:
5547                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
5548                 break;
5549         case 32:
5550         default:
5551                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
5552                 break;
5553         }
5554
5555         switch (scmd->sc_data_direction) {
5556         case DMA_FROM_DEVICE:
5557                 request->data_direction = SOP_READ_FLAG;
5558                 break;
5559         case DMA_TO_DEVICE:
5560                 request->data_direction = SOP_WRITE_FLAG;
5561                 break;
5562         case DMA_NONE:
5563                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5564                 break;
5565         case DMA_BIDIRECTIONAL:
5566                 request->data_direction = SOP_BIDIRECTIONAL;
5567                 break;
5568         default:
5569                 dev_err(&ctrl_info->pci_dev->dev,
5570                         "unknown data direction: %d\n",
5571                         scmd->sc_data_direction);
5572                 break;
5573         }
5574
5575         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5576         if (rc) {
5577                 pqi_free_io_request(io_request);
5578                 return SCSI_MLQUEUE_HOST_BUSY;
5579         }
5580
5581         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5582
5583         return 0;
5584 }
5585
5586 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5587         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5588         struct pqi_queue_group *queue_group)
5589 {
5590         struct pqi_io_request *io_request;
5591
5592         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5593         if (!io_request)
5594                 return SCSI_MLQUEUE_HOST_BUSY;
5595
5596         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5597                 device, scmd, queue_group);
5598 }
5599
5600 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5601 {
5602         struct scsi_cmnd *scmd;
5603         struct pqi_scsi_dev *device;
5604         struct pqi_ctrl_info *ctrl_info;
5605
5606         if (!io_request->raid_bypass)
5607                 return false;
5608
5609         scmd = io_request->scmd;
5610         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5611                 return false;
5612         if (host_byte(scmd->result) == DID_NO_CONNECT)
5613                 return false;
5614
5615         device = scmd->device->hostdata;
5616         if (pqi_device_offline(device) || pqi_device_in_remove(device))
5617                 return false;
5618
5619         ctrl_info = shost_to_hba(scmd->device->host);
5620         if (pqi_ctrl_offline(ctrl_info))
5621                 return false;
5622
5623         return true;
5624 }
5625
5626 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5627         void *context)
5628 {
5629         struct scsi_cmnd *scmd;
5630
5631         scmd = io_request->scmd;
5632         scsi_dma_unmap(scmd);
5633         if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
5634                 set_host_byte(scmd, DID_IMM_RETRY);
5635                 pqi_cmd_priv(scmd)->this_residual++;
5636         }
5637
5638         pqi_free_io_request(io_request);
5639         pqi_scsi_done(scmd);
5640 }
5641
5642 static inline bool pqi_is_io_high_priority(struct pqi_ctrl_info *ctrl_info,
5643         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd)
5644 {
5645         bool io_high_prio;
5646         int priority_class;
5647
5648         io_high_prio = false;
5649
5650         if (device->ncq_prio_enable) {
5651                 priority_class =
5652                         IOPRIO_PRIO_CLASS(req_get_ioprio(scsi_cmd_to_rq(scmd)));
5653                 if (priority_class == IOPRIO_CLASS_RT) {
5654                         /* Set NCQ priority for read/write commands. */
5655                         switch (scmd->cmnd[0]) {
5656                         case WRITE_16:
5657                         case READ_16:
5658                         case WRITE_12:
5659                         case READ_12:
5660                         case WRITE_10:
5661                         case READ_10:
5662                         case WRITE_6:
5663                         case READ_6:
5664                                 io_high_prio = true;
5665                                 break;
5666                         }
5667                 }
5668         }
5669
5670         return io_high_prio;
5671 }
5672
5673 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5674         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5675         struct pqi_queue_group *queue_group)
5676 {
5677         bool io_high_prio;
5678
5679         io_high_prio = pqi_is_io_high_priority(ctrl_info, device, scmd);
5680
5681         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5682                 scmd->cmnd, scmd->cmd_len, queue_group, NULL,
5683                 false, io_high_prio);
5684 }
5685
5686 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5687         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5688         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5689         struct pqi_encryption_info *encryption_info, bool raid_bypass,
5690         bool io_high_prio)
5691 {
5692         int rc;
5693         struct pqi_io_request *io_request;
5694         struct pqi_aio_path_request *request;
5695         struct pqi_scsi_dev *device;
5696
5697         device = scmd->device->hostdata;
5698         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5699         if (!io_request)
5700                 return SCSI_MLQUEUE_HOST_BUSY;
5701         io_request->io_complete_callback = pqi_aio_io_complete;
5702         io_request->scmd = scmd;
5703         io_request->raid_bypass = raid_bypass;
5704
5705         request = io_request->iu;
5706         memset(request, 0, offsetof(struct pqi_aio_path_request, sg_descriptors));
5707
5708         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5709         put_unaligned_le32(aio_handle, &request->nexus_id);
5710         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5711         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5712         request->command_priority = io_high_prio;
5713         put_unaligned_le16(io_request->index, &request->request_id);
5714         request->error_index = request->request_id;
5715         if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
5716                 put_unaligned_le64(((scmd->device->lun) << 8), &request->lun_number);
5717         if (cdb_length > sizeof(request->cdb))
5718                 cdb_length = sizeof(request->cdb);
5719         request->cdb_length = cdb_length;
5720         memcpy(request->cdb, cdb, cdb_length);
5721
5722         switch (scmd->sc_data_direction) {
5723         case DMA_TO_DEVICE:
5724                 request->data_direction = SOP_READ_FLAG;
5725                 break;
5726         case DMA_FROM_DEVICE:
5727                 request->data_direction = SOP_WRITE_FLAG;
5728                 break;
5729         case DMA_NONE:
5730                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5731                 break;
5732         case DMA_BIDIRECTIONAL:
5733                 request->data_direction = SOP_BIDIRECTIONAL;
5734                 break;
5735         default:
5736                 dev_err(&ctrl_info->pci_dev->dev,
5737                         "unknown data direction: %d\n",
5738                         scmd->sc_data_direction);
5739                 break;
5740         }
5741
5742         if (encryption_info) {
5743                 request->encryption_enable = true;
5744                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5745                         &request->data_encryption_key_index);
5746                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5747                         &request->encrypt_tweak_lower);
5748                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5749                         &request->encrypt_tweak_upper);
5750         }
5751
5752         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5753         if (rc) {
5754                 pqi_free_io_request(io_request);
5755                 return SCSI_MLQUEUE_HOST_BUSY;
5756         }
5757
5758         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5759
5760         return 0;
5761 }
5762
5763 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
5764         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5765         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5766         struct pqi_scsi_dev_raid_map_data *rmd)
5767 {
5768         int rc;
5769         struct pqi_io_request *io_request;
5770         struct pqi_aio_r1_path_request *r1_request;
5771
5772         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5773         if (!io_request)
5774                 return SCSI_MLQUEUE_HOST_BUSY;
5775
5776         io_request->io_complete_callback = pqi_aio_io_complete;
5777         io_request->scmd = scmd;
5778         io_request->raid_bypass = true;
5779
5780         r1_request = io_request->iu;
5781         memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
5782
5783         r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
5784         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
5785         r1_request->num_drives = rmd->num_it_nexus_entries;
5786         put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
5787         put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
5788         if (rmd->num_it_nexus_entries == 3)
5789                 put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
5790
5791         put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
5792         r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5793         put_unaligned_le16(io_request->index, &r1_request->request_id);
5794         r1_request->error_index = r1_request->request_id;
5795         if (rmd->cdb_length > sizeof(r1_request->cdb))
5796                 rmd->cdb_length = sizeof(r1_request->cdb);
5797         r1_request->cdb_length = rmd->cdb_length;
5798         memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
5799
5800         /* The direction is always write. */
5801         r1_request->data_direction = SOP_READ_FLAG;
5802
5803         if (encryption_info) {
5804                 r1_request->encryption_enable = true;
5805                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5806                                 &r1_request->data_encryption_key_index);
5807                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5808                                 &r1_request->encrypt_tweak_lower);
5809                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5810                                 &r1_request->encrypt_tweak_upper);
5811         }
5812
5813         rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
5814         if (rc) {
5815                 pqi_free_io_request(io_request);
5816                 return SCSI_MLQUEUE_HOST_BUSY;
5817         }
5818
5819         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5820
5821         return 0;
5822 }
5823
5824 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
5825         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5826         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5827         struct pqi_scsi_dev_raid_map_data *rmd)
5828 {
5829         int rc;
5830         struct pqi_io_request *io_request;
5831         struct pqi_aio_r56_path_request *r56_request;
5832
5833         io_request = pqi_alloc_io_request(ctrl_info, scmd);
5834         if (!io_request)
5835                 return SCSI_MLQUEUE_HOST_BUSY;
5836         io_request->io_complete_callback = pqi_aio_io_complete;
5837         io_request->scmd = scmd;
5838         io_request->raid_bypass = true;
5839
5840         r56_request = io_request->iu;
5841         memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
5842
5843         if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
5844                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
5845         else
5846                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
5847
5848         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
5849         put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
5850         put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
5851         if (rmd->raid_level == SA_RAID_6) {
5852                 put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
5853                 r56_request->xor_multiplier = rmd->xor_mult;
5854         }
5855         put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
5856         r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5857         put_unaligned_le64(rmd->row, &r56_request->row);
5858
5859         put_unaligned_le16(io_request->index, &r56_request->request_id);
5860         r56_request->error_index = r56_request->request_id;
5861
5862         if (rmd->cdb_length > sizeof(r56_request->cdb))
5863                 rmd->cdb_length = sizeof(r56_request->cdb);
5864         r56_request->cdb_length = rmd->cdb_length;
5865         memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
5866
5867         /* The direction is always write. */
5868         r56_request->data_direction = SOP_READ_FLAG;
5869
5870         if (encryption_info) {
5871                 r56_request->encryption_enable = true;
5872                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5873                                 &r56_request->data_encryption_key_index);
5874                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5875                                 &r56_request->encrypt_tweak_lower);
5876                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5877                                 &r56_request->encrypt_tweak_upper);
5878         }
5879
5880         rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
5881         if (rc) {
5882                 pqi_free_io_request(io_request);
5883                 return SCSI_MLQUEUE_HOST_BUSY;
5884         }
5885
5886         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5887
5888         return 0;
5889 }
5890
5891 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5892         struct scsi_cmnd *scmd)
5893 {
5894         /*
5895          * We are setting host_tagset = 1 during init.
5896          */
5897         return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
5898 }
5899
5900 static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
5901 {
5902         if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
5903                 return false;
5904
5905         return pqi_cmd_priv(scmd)->this_residual == 0;
5906 }
5907
5908 /*
5909  * This function gets called just before we hand the completed SCSI request
5910  * back to the SML.
5911  */
5912
5913 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5914 {
5915         struct pqi_scsi_dev *device;
5916
5917         if (!scmd->device) {
5918                 set_host_byte(scmd, DID_NO_CONNECT);
5919                 return;
5920         }
5921
5922         device = scmd->device->hostdata;
5923         if (!device) {
5924                 set_host_byte(scmd, DID_NO_CONNECT);
5925                 return;
5926         }
5927
5928         atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
5929 }
5930
5931 static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
5932         struct scsi_cmnd *scmd)
5933 {
5934         u32 oldest_jiffies;
5935         u8 lru_index;
5936         int i;
5937         int rc;
5938         struct pqi_scsi_dev *device;
5939         struct pqi_stream_data *pqi_stream_data;
5940         struct pqi_scsi_dev_raid_map_data rmd;
5941
5942         if (!ctrl_info->enable_stream_detection)
5943                 return false;
5944
5945         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
5946         if (rc)
5947                 return false;
5948
5949         /* Check writes only. */
5950         if (!rmd.is_write)
5951                 return false;
5952
5953         device = scmd->device->hostdata;
5954
5955         /* Check for RAID 5/6 streams. */
5956         if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
5957                 return false;
5958
5959         /*
5960          * If controller does not support AIO RAID{5,6} writes, need to send
5961          * requests down non-AIO path.
5962          */
5963         if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
5964                 (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
5965                 return true;
5966
5967         lru_index = 0;
5968         oldest_jiffies = INT_MAX;
5969         for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
5970                 pqi_stream_data = &device->stream_data[i];
5971                 /*
5972                  * Check for adjacent request or request is within
5973                  * the previous request.
5974                  */
5975                 if ((pqi_stream_data->next_lba &&
5976                         rmd.first_block >= pqi_stream_data->next_lba) &&
5977                         rmd.first_block <= pqi_stream_data->next_lba +
5978                                 rmd.block_cnt) {
5979                         pqi_stream_data->next_lba = rmd.first_block +
5980                                 rmd.block_cnt;
5981                         pqi_stream_data->last_accessed = jiffies;
5982                         return true;
5983                 }
5984
5985                 /* unused entry */
5986                 if (pqi_stream_data->last_accessed == 0) {
5987                         lru_index = i;
5988                         break;
5989                 }
5990
5991                 /* Find entry with oldest last accessed time. */
5992                 if (pqi_stream_data->last_accessed <= oldest_jiffies) {
5993                         oldest_jiffies = pqi_stream_data->last_accessed;
5994                         lru_index = i;
5995                 }
5996         }
5997
5998         /* Set LRU entry. */
5999         pqi_stream_data = &device->stream_data[lru_index];
6000         pqi_stream_data->last_accessed = jiffies;
6001         pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
6002
6003         return false;
6004 }
6005
6006 static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
6007 {
6008         int rc;
6009         struct pqi_ctrl_info *ctrl_info;
6010         struct pqi_scsi_dev *device;
6011         u16 hw_queue;
6012         struct pqi_queue_group *queue_group;
6013         bool raid_bypassed;
6014
6015         device = scmd->device->hostdata;
6016
6017         if (!device) {
6018                 set_host_byte(scmd, DID_NO_CONNECT);
6019                 pqi_scsi_done(scmd);
6020                 return 0;
6021         }
6022
6023         atomic_inc(&device->scsi_cmds_outstanding[scmd->device->lun]);
6024
6025         ctrl_info = shost_to_hba(shost);
6026
6027         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
6028                 set_host_byte(scmd, DID_NO_CONNECT);
6029                 pqi_scsi_done(scmd);
6030                 return 0;
6031         }
6032
6033         if (pqi_ctrl_blocked(ctrl_info)) {
6034                 rc = SCSI_MLQUEUE_HOST_BUSY;
6035                 goto out;
6036         }
6037
6038         /*
6039          * This is necessary because the SML doesn't zero out this field during
6040          * error recovery.
6041          */
6042         scmd->result = 0;
6043
6044         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
6045         queue_group = &ctrl_info->queue_groups[hw_queue];
6046
6047         if (pqi_is_logical_device(device)) {
6048                 raid_bypassed = false;
6049                 if (device->raid_bypass_enabled &&
6050                         pqi_is_bypass_eligible_request(scmd) &&
6051                         !pqi_is_parity_write_stream(ctrl_info, scmd)) {
6052                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6053                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
6054                                 raid_bypassed = true;
6055                                 atomic_inc(&device->raid_bypass_cnt);
6056                         }
6057                 }
6058                 if (!raid_bypassed)
6059                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6060         } else {
6061                 if (device->aio_enabled)
6062                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6063                 else
6064                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
6065         }
6066
6067 out:
6068         if (rc)
6069                 atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
6070
6071         return rc;
6072 }
6073
6074 static unsigned int pqi_queued_io_count(struct pqi_ctrl_info *ctrl_info)
6075 {
6076         unsigned int i;
6077         unsigned int path;
6078         unsigned long flags;
6079         unsigned int queued_io_count;
6080         struct pqi_queue_group *queue_group;
6081         struct pqi_io_request *io_request;
6082
6083         queued_io_count = 0;
6084
6085         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6086                 queue_group = &ctrl_info->queue_groups[i];
6087                 for (path = 0; path < 2; path++) {
6088                         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
6089                         list_for_each_entry(io_request, &queue_group->request_list[path], request_list_entry)
6090                                 queued_io_count++;
6091                         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
6092                 }
6093         }
6094
6095         return queued_io_count;
6096 }
6097
6098 static unsigned int pqi_nonempty_inbound_queue_count(struct pqi_ctrl_info *ctrl_info)
6099 {
6100         unsigned int i;
6101         unsigned int path;
6102         unsigned int nonempty_inbound_queue_count;
6103         struct pqi_queue_group *queue_group;
6104         pqi_index_t iq_pi;
6105         pqi_index_t iq_ci;
6106
6107         nonempty_inbound_queue_count = 0;
6108
6109         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6110                 queue_group = &ctrl_info->queue_groups[i];
6111                 for (path = 0; path < 2; path++) {
6112                         iq_pi = queue_group->iq_pi_copy[path];
6113                         iq_ci = readl(queue_group->iq_ci[path]);
6114                         if (iq_ci != iq_pi)
6115                                 nonempty_inbound_queue_count++;
6116                 }
6117         }
6118
6119         return nonempty_inbound_queue_count;
6120 }
6121
6122 #define PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS        10
6123
6124 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
6125 {
6126         unsigned long start_jiffies;
6127         unsigned long warning_timeout;
6128         unsigned int queued_io_count;
6129         unsigned int nonempty_inbound_queue_count;
6130         bool displayed_warning;
6131
6132         displayed_warning = false;
6133         start_jiffies = jiffies;
6134         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6135
6136         while (1) {
6137                 queued_io_count = pqi_queued_io_count(ctrl_info);
6138                 nonempty_inbound_queue_count = pqi_nonempty_inbound_queue_count(ctrl_info);
6139                 if (queued_io_count == 0 && nonempty_inbound_queue_count == 0)
6140                         break;
6141                 pqi_check_ctrl_health(ctrl_info);
6142                 if (pqi_ctrl_offline(ctrl_info))
6143                         return -ENXIO;
6144                 if (time_after(jiffies, warning_timeout)) {
6145                         dev_warn(&ctrl_info->pci_dev->dev,
6146                                 "waiting %u seconds for queued I/O to drain (queued I/O count: %u; non-empty inbound queue count: %u)\n",
6147                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000, queued_io_count, nonempty_inbound_queue_count);
6148                         displayed_warning = true;
6149                         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6150                 }
6151                 usleep_range(1000, 2000);
6152         }
6153
6154         if (displayed_warning)
6155                 dev_warn(&ctrl_info->pci_dev->dev,
6156                         "queued I/O drained after waiting for %u seconds\n",
6157                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
6158
6159         return 0;
6160 }
6161
6162 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
6163         struct pqi_scsi_dev *device)
6164 {
6165         unsigned int i;
6166         unsigned int path;
6167         struct pqi_queue_group *queue_group;
6168         unsigned long flags;
6169         struct pqi_io_request *io_request;
6170         struct pqi_io_request *next;
6171         struct scsi_cmnd *scmd;
6172         struct pqi_scsi_dev *scsi_device;
6173
6174         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6175                 queue_group = &ctrl_info->queue_groups[i];
6176
6177                 for (path = 0; path < 2; path++) {
6178                         spin_lock_irqsave(
6179                                 &queue_group->submit_lock[path], flags);
6180
6181                         list_for_each_entry_safe(io_request, next,
6182                                 &queue_group->request_list[path],
6183                                 request_list_entry) {
6184
6185                                 scmd = io_request->scmd;
6186                                 if (!scmd)
6187                                         continue;
6188
6189                                 scsi_device = scmd->device->hostdata;
6190                                 if (scsi_device != device)
6191                                         continue;
6192
6193                                 list_del(&io_request->request_list_entry);
6194                                 set_host_byte(scmd, DID_RESET);
6195                                 pqi_free_io_request(io_request);
6196                                 scsi_dma_unmap(scmd);
6197                                 pqi_scsi_done(scmd);
6198                         }
6199
6200                         spin_unlock_irqrestore(
6201                                 &queue_group->submit_lock[path], flags);
6202                 }
6203         }
6204 }
6205
6206 #define PQI_PENDING_IO_WARNING_TIMEOUT_SECS     10
6207
6208 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
6209         struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs)
6210 {
6211         int cmds_outstanding;
6212         unsigned long start_jiffies;
6213         unsigned long warning_timeout;
6214         unsigned long msecs_waiting;
6215
6216         start_jiffies = jiffies;
6217         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
6218
6219         while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun])) > 0) {
6220                 if (ctrl_info->ctrl_removal_state != PQI_CTRL_GRACEFUL_REMOVAL) {
6221                         pqi_check_ctrl_health(ctrl_info);
6222                         if (pqi_ctrl_offline(ctrl_info))
6223                                 return -ENXIO;
6224                 }
6225                 msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
6226                 if (msecs_waiting >= timeout_msecs) {
6227                         dev_err(&ctrl_info->pci_dev->dev,
6228                                 "scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
6229                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6230                                 lun, msecs_waiting / 1000, cmds_outstanding);
6231                         return -ETIMEDOUT;
6232                 }
6233                 if (time_after(jiffies, warning_timeout)) {
6234                         dev_warn(&ctrl_info->pci_dev->dev,
6235                                 "scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
6236                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6237                                 lun, msecs_waiting / 1000, cmds_outstanding);
6238                         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + jiffies;
6239                 }
6240                 usleep_range(1000, 2000);
6241         }
6242
6243         return 0;
6244 }
6245
6246 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
6247         void *context)
6248 {
6249         struct completion *waiting = context;
6250
6251         complete(waiting);
6252 }
6253
6254 #define PQI_LUN_RESET_POLL_COMPLETION_SECS      10
6255
6256 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
6257         struct pqi_scsi_dev *device, u8 lun, struct completion *wait)
6258 {
6259         int rc;
6260         unsigned int wait_secs;
6261         int cmds_outstanding;
6262
6263         wait_secs = 0;
6264
6265         while (1) {
6266                 if (wait_for_completion_io_timeout(wait,
6267                         PQI_LUN_RESET_POLL_COMPLETION_SECS * HZ)) {
6268                         rc = 0;
6269                         break;
6270                 }
6271
6272                 pqi_check_ctrl_health(ctrl_info);
6273                 if (pqi_ctrl_offline(ctrl_info)) {
6274                         rc = -ENXIO;
6275                         break;
6276                 }
6277
6278                 wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
6279                 cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun]);
6280                 dev_warn(&ctrl_info->pci_dev->dev,
6281                         "scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete (%d command(s) outstanding)\n",
6282                         ctrl_info->scsi_host->host_no, device->bus, device->target, lun, wait_secs, cmds_outstanding);
6283         }
6284
6285         return rc;
6286 }
6287
6288 #define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS     30
6289
6290 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6291 {
6292         int rc;
6293         struct pqi_io_request *io_request;
6294         DECLARE_COMPLETION_ONSTACK(wait);
6295         struct pqi_task_management_request *request;
6296         struct pqi_scsi_dev *device;
6297
6298         device = scmd->device->hostdata;
6299         io_request = pqi_alloc_io_request(ctrl_info, NULL);
6300         io_request->io_complete_callback = pqi_lun_reset_complete;
6301         io_request->context = &wait;
6302
6303         request = io_request->iu;
6304         memset(request, 0, sizeof(*request));
6305
6306         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
6307         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
6308                 &request->header.iu_length);
6309         put_unaligned_le16(io_request->index, &request->request_id);
6310         memcpy(request->lun_number, device->scsi3addr,
6311                 sizeof(request->lun_number));
6312         if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
6313                 request->ml_device_lun_number = (u8)scmd->device->lun;
6314         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
6315         if (ctrl_info->tmf_iu_timeout_supported)
6316                 put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
6317
6318         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
6319                 io_request);
6320
6321         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, (u8)scmd->device->lun, &wait);
6322         if (rc == 0)
6323                 rc = io_request->status;
6324
6325         pqi_free_io_request(io_request);
6326
6327         return rc;
6328 }
6329
6330 #define PQI_LUN_RESET_RETRIES                           3
6331 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS              (10 * 1000)
6332 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS          (10 * 60 * 1000)
6333 #define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS   (2 * 60 * 1000)
6334
6335 static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6336 {
6337         int reset_rc;
6338         int wait_rc;
6339         unsigned int retries;
6340         unsigned long timeout_msecs;
6341         struct pqi_scsi_dev *device;
6342
6343         device = scmd->device->hostdata;
6344         for (retries = 0;;) {
6345                 reset_rc = pqi_lun_reset(ctrl_info, scmd);
6346                 if (reset_rc == 0 || reset_rc == -ENODEV || ++retries > PQI_LUN_RESET_RETRIES)
6347                         break;
6348                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
6349         }
6350
6351         timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
6352                 PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
6353
6354         wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, scmd->device->lun, timeout_msecs);
6355         if (wait_rc && reset_rc == 0)
6356                 reset_rc = wait_rc;
6357
6358         return reset_rc == 0 ? SUCCESS : FAILED;
6359 }
6360
6361 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
6362 {
6363         int rc;
6364         struct pqi_scsi_dev *device;
6365
6366         device = scmd->device->hostdata;
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);
6370         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
6371         if (rc)
6372                 rc = FAILED;
6373         else
6374                 rc = pqi_lun_reset_with_retries(ctrl_info, scmd);
6375         pqi_ctrl_unblock_requests(ctrl_info);
6376
6377         return rc;
6378 }
6379
6380 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
6381 {
6382         int rc;
6383         struct Scsi_Host *shost;
6384         struct pqi_ctrl_info *ctrl_info;
6385         struct pqi_scsi_dev *device;
6386
6387         shost = scmd->device->host;
6388         ctrl_info = shost_to_hba(shost);
6389         device = scmd->device->hostdata;
6390
6391         mutex_lock(&ctrl_info->lun_reset_mutex);
6392
6393         dev_err(&ctrl_info->pci_dev->dev,
6394                 "resetting scsi %d:%d:%d:%d due to cmd 0x%02x\n",
6395                 shost->host_no,
6396                 device->bus, device->target, (u32)scmd->device->lun,
6397                 scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff);
6398
6399         pqi_check_ctrl_health(ctrl_info);
6400         if (pqi_ctrl_offline(ctrl_info))
6401                 rc = FAILED;
6402         else
6403                 rc = pqi_device_reset(ctrl_info, scmd);
6404
6405         dev_err(&ctrl_info->pci_dev->dev,
6406                 "reset of scsi %d:%d:%d:%d: %s\n",
6407                 shost->host_no, device->bus, device->target, (u32)scmd->device->lun,
6408                 rc == SUCCESS ? "SUCCESS" : "FAILED");
6409
6410         mutex_unlock(&ctrl_info->lun_reset_mutex);
6411
6412         return rc;
6413 }
6414
6415 static int pqi_slave_alloc(struct scsi_device *sdev)
6416 {
6417         struct pqi_scsi_dev *device;
6418         unsigned long flags;
6419         struct pqi_ctrl_info *ctrl_info;
6420         struct scsi_target *starget;
6421         struct sas_rphy *rphy;
6422
6423         ctrl_info = shost_to_hba(sdev->host);
6424
6425         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6426
6427         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
6428                 starget = scsi_target(sdev);
6429                 rphy = target_to_rphy(starget);
6430                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
6431                 if (device) {
6432                         if (device->target_lun_valid) {
6433                                 device->ignore_device = true;
6434                         } else {
6435                                 device->target = sdev_id(sdev);
6436                                 device->lun = sdev->lun;
6437                                 device->target_lun_valid = true;
6438                         }
6439                 }
6440         } else {
6441                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
6442                         sdev_id(sdev), sdev->lun);
6443         }
6444
6445         if (device) {
6446                 sdev->hostdata = device;
6447                 device->sdev = sdev;
6448                 if (device->queue_depth) {
6449                         device->advertised_queue_depth = device->queue_depth;
6450                         scsi_change_queue_depth(sdev,
6451                                 device->advertised_queue_depth);
6452                 }
6453                 if (pqi_is_logical_device(device)) {
6454                         pqi_disable_write_same(sdev);
6455                 } else {
6456                         sdev->allow_restart = 1;
6457                         if (device->device_type == SA_DEVICE_TYPE_NVME)
6458                                 pqi_disable_write_same(sdev);
6459                 }
6460         }
6461
6462         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6463
6464         return 0;
6465 }
6466
6467 static void pqi_map_queues(struct Scsi_Host *shost)
6468 {
6469         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6470
6471         blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
6472                               ctrl_info->pci_dev, 0);
6473 }
6474
6475 static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
6476 {
6477         return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
6478 }
6479
6480 static int pqi_slave_configure(struct scsi_device *sdev)
6481 {
6482         int rc = 0;
6483         struct pqi_scsi_dev *device;
6484
6485         device = sdev->hostdata;
6486         device->devtype = sdev->type;
6487
6488         if (pqi_is_tape_changer_device(device) && device->ignore_device) {
6489                 rc = -ENXIO;
6490                 device->ignore_device = false;
6491         }
6492
6493         return rc;
6494 }
6495
6496 static void pqi_slave_destroy(struct scsi_device *sdev)
6497 {
6498         struct pqi_ctrl_info *ctrl_info;
6499         struct pqi_scsi_dev *device;
6500         int mutex_acquired;
6501         unsigned long flags;
6502
6503         ctrl_info = shost_to_hba(sdev->host);
6504
6505         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
6506         if (!mutex_acquired)
6507                 return;
6508
6509         device = sdev->hostdata;
6510         if (!device) {
6511                 mutex_unlock(&ctrl_info->scan_mutex);
6512                 return;
6513         }
6514
6515         device->lun_count--;
6516         if (device->lun_count > 0) {
6517                 mutex_unlock(&ctrl_info->scan_mutex);
6518                 return;
6519         }
6520
6521         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6522         list_del(&device->scsi_device_list_entry);
6523         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6524
6525         mutex_unlock(&ctrl_info->scan_mutex);
6526
6527         pqi_dev_info(ctrl_info, "removed", device);
6528         pqi_free_device(device);
6529 }
6530
6531 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6532 {
6533         struct pci_dev *pci_dev;
6534         u32 subsystem_vendor;
6535         u32 subsystem_device;
6536         cciss_pci_info_struct pciinfo;
6537
6538         if (!arg)
6539                 return -EINVAL;
6540
6541         pci_dev = ctrl_info->pci_dev;
6542
6543         pciinfo.domain = pci_domain_nr(pci_dev->bus);
6544         pciinfo.bus = pci_dev->bus->number;
6545         pciinfo.dev_fn = pci_dev->devfn;
6546         subsystem_vendor = pci_dev->subsystem_vendor;
6547         subsystem_device = pci_dev->subsystem_device;
6548         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
6549
6550         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
6551                 return -EFAULT;
6552
6553         return 0;
6554 }
6555
6556 static int pqi_getdrivver_ioctl(void __user *arg)
6557 {
6558         u32 version;
6559
6560         if (!arg)
6561                 return -EINVAL;
6562
6563         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
6564                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
6565
6566         if (copy_to_user(arg, &version, sizeof(version)))
6567                 return -EFAULT;
6568
6569         return 0;
6570 }
6571
6572 struct ciss_error_info {
6573         u8      scsi_status;
6574         int     command_status;
6575         size_t  sense_data_length;
6576 };
6577
6578 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
6579         struct ciss_error_info *ciss_error_info)
6580 {
6581         int ciss_cmd_status;
6582         size_t sense_data_length;
6583
6584         switch (pqi_error_info->data_out_result) {
6585         case PQI_DATA_IN_OUT_GOOD:
6586                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
6587                 break;
6588         case PQI_DATA_IN_OUT_UNDERFLOW:
6589                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
6590                 break;
6591         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
6592                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
6593                 break;
6594         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
6595         case PQI_DATA_IN_OUT_BUFFER_ERROR:
6596         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
6597         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
6598         case PQI_DATA_IN_OUT_ERROR:
6599                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
6600                 break;
6601         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
6602         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
6603         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
6604         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
6605         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
6606         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
6607         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
6608         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
6609         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
6610         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
6611                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
6612                 break;
6613         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
6614                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
6615                 break;
6616         case PQI_DATA_IN_OUT_ABORTED:
6617                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
6618                 break;
6619         case PQI_DATA_IN_OUT_TIMEOUT:
6620                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
6621                 break;
6622         default:
6623                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
6624                 break;
6625         }
6626
6627         sense_data_length =
6628                 get_unaligned_le16(&pqi_error_info->sense_data_length);
6629         if (sense_data_length == 0)
6630                 sense_data_length =
6631                 get_unaligned_le16(&pqi_error_info->response_data_length);
6632         if (sense_data_length)
6633                 if (sense_data_length > sizeof(pqi_error_info->data))
6634                         sense_data_length = sizeof(pqi_error_info->data);
6635
6636         ciss_error_info->scsi_status = pqi_error_info->status;
6637         ciss_error_info->command_status = ciss_cmd_status;
6638         ciss_error_info->sense_data_length = sense_data_length;
6639 }
6640
6641 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6642 {
6643         int rc;
6644         char *kernel_buffer = NULL;
6645         u16 iu_length;
6646         size_t sense_data_length;
6647         IOCTL_Command_struct iocommand;
6648         struct pqi_raid_path_request request;
6649         struct pqi_raid_error_info pqi_error_info;
6650         struct ciss_error_info ciss_error_info;
6651
6652         if (pqi_ctrl_offline(ctrl_info))
6653                 return -ENXIO;
6654         if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
6655                 return -EBUSY;
6656         if (!arg)
6657                 return -EINVAL;
6658         if (!capable(CAP_SYS_RAWIO))
6659                 return -EPERM;
6660         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
6661                 return -EFAULT;
6662         if (iocommand.buf_size < 1 &&
6663                 iocommand.Request.Type.Direction != XFER_NONE)
6664                 return -EINVAL;
6665         if (iocommand.Request.CDBLen > sizeof(request.cdb))
6666                 return -EINVAL;
6667         if (iocommand.Request.Type.Type != TYPE_CMD)
6668                 return -EINVAL;
6669
6670         switch (iocommand.Request.Type.Direction) {
6671         case XFER_NONE:
6672         case XFER_WRITE:
6673         case XFER_READ:
6674         case XFER_READ | XFER_WRITE:
6675                 break;
6676         default:
6677                 return -EINVAL;
6678         }
6679
6680         if (iocommand.buf_size > 0) {
6681                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6682                 if (!kernel_buffer)
6683                         return -ENOMEM;
6684                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6685                         if (copy_from_user(kernel_buffer, iocommand.buf,
6686                                 iocommand.buf_size)) {
6687                                 rc = -EFAULT;
6688                                 goto out;
6689                         }
6690                 } else {
6691                         memset(kernel_buffer, 0, iocommand.buf_size);
6692                 }
6693         }
6694
6695         memset(&request, 0, sizeof(request));
6696
6697         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6698         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6699                 PQI_REQUEST_HEADER_LENGTH;
6700         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6701                 sizeof(request.lun_number));
6702         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6703         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6704
6705         switch (iocommand.Request.Type.Direction) {
6706         case XFER_NONE:
6707                 request.data_direction = SOP_NO_DIRECTION_FLAG;
6708                 break;
6709         case XFER_WRITE:
6710                 request.data_direction = SOP_WRITE_FLAG;
6711                 break;
6712         case XFER_READ:
6713                 request.data_direction = SOP_READ_FLAG;
6714                 break;
6715         case XFER_READ | XFER_WRITE:
6716                 request.data_direction = SOP_BIDIRECTIONAL;
6717                 break;
6718         }
6719
6720         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6721
6722         if (iocommand.buf_size > 0) {
6723                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6724
6725                 rc = pqi_map_single(ctrl_info->pci_dev,
6726                         &request.sg_descriptors[0], kernel_buffer,
6727                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6728                 if (rc)
6729                         goto out;
6730
6731                 iu_length += sizeof(request.sg_descriptors[0]);
6732         }
6733
6734         put_unaligned_le16(iu_length, &request.header.iu_length);
6735
6736         if (ctrl_info->raid_iu_timeout_supported)
6737                 put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6738
6739         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6740                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
6741
6742         if (iocommand.buf_size > 0)
6743                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6744                         DMA_BIDIRECTIONAL);
6745
6746         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6747
6748         if (rc == 0) {
6749                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6750                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6751                 iocommand.error_info.CommandStatus =
6752                         ciss_error_info.command_status;
6753                 sense_data_length = ciss_error_info.sense_data_length;
6754                 if (sense_data_length) {
6755                         if (sense_data_length >
6756                                 sizeof(iocommand.error_info.SenseInfo))
6757                                 sense_data_length =
6758                                         sizeof(iocommand.error_info.SenseInfo);
6759                         memcpy(iocommand.error_info.SenseInfo,
6760                                 pqi_error_info.data, sense_data_length);
6761                         iocommand.error_info.SenseLen = sense_data_length;
6762                 }
6763         }
6764
6765         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6766                 rc = -EFAULT;
6767                 goto out;
6768         }
6769
6770         if (rc == 0 && iocommand.buf_size > 0 &&
6771                 (iocommand.Request.Type.Direction & XFER_READ)) {
6772                 if (copy_to_user(iocommand.buf, kernel_buffer,
6773                         iocommand.buf_size)) {
6774                         rc = -EFAULT;
6775                 }
6776         }
6777
6778 out:
6779         kfree(kernel_buffer);
6780
6781         return rc;
6782 }
6783
6784 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6785                      void __user *arg)
6786 {
6787         int rc;
6788         struct pqi_ctrl_info *ctrl_info;
6789
6790         ctrl_info = shost_to_hba(sdev->host);
6791
6792         switch (cmd) {
6793         case CCISS_DEREGDISK:
6794         case CCISS_REGNEWDISK:
6795         case CCISS_REGNEWD:
6796                 rc = pqi_scan_scsi_devices(ctrl_info);
6797                 break;
6798         case CCISS_GETPCIINFO:
6799                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6800                 break;
6801         case CCISS_GETDRIVVER:
6802                 rc = pqi_getdrivver_ioctl(arg);
6803                 break;
6804         case CCISS_PASSTHRU:
6805                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6806                 break;
6807         default:
6808                 rc = -EINVAL;
6809                 break;
6810         }
6811
6812         return rc;
6813 }
6814
6815 static ssize_t pqi_firmware_version_show(struct device *dev,
6816         struct device_attribute *attr, char *buffer)
6817 {
6818         struct Scsi_Host *shost;
6819         struct pqi_ctrl_info *ctrl_info;
6820
6821         shost = class_to_shost(dev);
6822         ctrl_info = shost_to_hba(shost);
6823
6824         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6825 }
6826
6827 static ssize_t pqi_driver_version_show(struct device *dev,
6828         struct device_attribute *attr, char *buffer)
6829 {
6830         return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6831 }
6832
6833 static ssize_t pqi_serial_number_show(struct device *dev,
6834         struct device_attribute *attr, char *buffer)
6835 {
6836         struct Scsi_Host *shost;
6837         struct pqi_ctrl_info *ctrl_info;
6838
6839         shost = class_to_shost(dev);
6840         ctrl_info = shost_to_hba(shost);
6841
6842         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6843 }
6844
6845 static ssize_t pqi_model_show(struct device *dev,
6846         struct device_attribute *attr, char *buffer)
6847 {
6848         struct Scsi_Host *shost;
6849         struct pqi_ctrl_info *ctrl_info;
6850
6851         shost = class_to_shost(dev);
6852         ctrl_info = shost_to_hba(shost);
6853
6854         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6855 }
6856
6857 static ssize_t pqi_vendor_show(struct device *dev,
6858         struct device_attribute *attr, char *buffer)
6859 {
6860         struct Scsi_Host *shost;
6861         struct pqi_ctrl_info *ctrl_info;
6862
6863         shost = class_to_shost(dev);
6864         ctrl_info = shost_to_hba(shost);
6865
6866         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6867 }
6868
6869 static ssize_t pqi_host_rescan_store(struct device *dev,
6870         struct device_attribute *attr, const char *buffer, size_t count)
6871 {
6872         struct Scsi_Host *shost = class_to_shost(dev);
6873
6874         pqi_scan_start(shost);
6875
6876         return count;
6877 }
6878
6879 static ssize_t pqi_lockup_action_show(struct device *dev,
6880         struct device_attribute *attr, char *buffer)
6881 {
6882         int count = 0;
6883         unsigned int i;
6884
6885         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6886                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6887                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6888                                 "[%s] ", pqi_lockup_actions[i].name);
6889                 else
6890                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6891                                 "%s ", pqi_lockup_actions[i].name);
6892         }
6893
6894         count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6895
6896         return count;
6897 }
6898
6899 static ssize_t pqi_lockup_action_store(struct device *dev,
6900         struct device_attribute *attr, const char *buffer, size_t count)
6901 {
6902         unsigned int i;
6903         char *action_name;
6904         char action_name_buffer[32];
6905
6906         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6907         action_name = strstrip(action_name_buffer);
6908
6909         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6910                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6911                         pqi_lockup_action = pqi_lockup_actions[i].action;
6912                         return count;
6913                 }
6914         }
6915
6916         return -EINVAL;
6917 }
6918
6919 static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
6920         struct device_attribute *attr, char *buffer)
6921 {
6922         struct Scsi_Host *shost = class_to_shost(dev);
6923         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6924
6925         return scnprintf(buffer, 10, "%x\n",
6926                         ctrl_info->enable_stream_detection);
6927 }
6928
6929 static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
6930         struct device_attribute *attr, const char *buffer, size_t count)
6931 {
6932         struct Scsi_Host *shost = class_to_shost(dev);
6933         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6934         u8 set_stream_detection = 0;
6935
6936         if (kstrtou8(buffer, 0, &set_stream_detection))
6937                 return -EINVAL;
6938
6939         if (set_stream_detection > 0)
6940                 set_stream_detection = 1;
6941
6942         ctrl_info->enable_stream_detection = set_stream_detection;
6943
6944         return count;
6945 }
6946
6947 static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
6948         struct device_attribute *attr, char *buffer)
6949 {
6950         struct Scsi_Host *shost = class_to_shost(dev);
6951         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6952
6953         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
6954 }
6955
6956 static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
6957         struct device_attribute *attr, const char *buffer, size_t count)
6958 {
6959         struct Scsi_Host *shost = class_to_shost(dev);
6960         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6961         u8 set_r5_writes = 0;
6962
6963         if (kstrtou8(buffer, 0, &set_r5_writes))
6964                 return -EINVAL;
6965
6966         if (set_r5_writes > 0)
6967                 set_r5_writes = 1;
6968
6969         ctrl_info->enable_r5_writes = set_r5_writes;
6970
6971         return count;
6972 }
6973
6974 static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
6975         struct device_attribute *attr, char *buffer)
6976 {
6977         struct Scsi_Host *shost = class_to_shost(dev);
6978         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6979
6980         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
6981 }
6982
6983 static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
6984         struct device_attribute *attr, const char *buffer, size_t count)
6985 {
6986         struct Scsi_Host *shost = class_to_shost(dev);
6987         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6988         u8 set_r6_writes = 0;
6989
6990         if (kstrtou8(buffer, 0, &set_r6_writes))
6991                 return -EINVAL;
6992
6993         if (set_r6_writes > 0)
6994                 set_r6_writes = 1;
6995
6996         ctrl_info->enable_r6_writes = set_r6_writes;
6997
6998         return count;
6999 }
7000
7001 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
7002 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
7003 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
7004 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
7005 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
7006 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
7007 static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
7008         pqi_lockup_action_store);
7009 static DEVICE_ATTR(enable_stream_detection, 0644,
7010         pqi_host_enable_stream_detection_show,
7011         pqi_host_enable_stream_detection_store);
7012 static DEVICE_ATTR(enable_r5_writes, 0644,
7013         pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
7014 static DEVICE_ATTR(enable_r6_writes, 0644,
7015         pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
7016
7017 static struct attribute *pqi_shost_attrs[] = {
7018         &dev_attr_driver_version.attr,
7019         &dev_attr_firmware_version.attr,
7020         &dev_attr_model.attr,
7021         &dev_attr_serial_number.attr,
7022         &dev_attr_vendor.attr,
7023         &dev_attr_rescan.attr,
7024         &dev_attr_lockup_action.attr,
7025         &dev_attr_enable_stream_detection.attr,
7026         &dev_attr_enable_r5_writes.attr,
7027         &dev_attr_enable_r6_writes.attr,
7028         NULL
7029 };
7030
7031 ATTRIBUTE_GROUPS(pqi_shost);
7032
7033 static ssize_t pqi_unique_id_show(struct device *dev,
7034         struct device_attribute *attr, char *buffer)
7035 {
7036         struct pqi_ctrl_info *ctrl_info;
7037         struct scsi_device *sdev;
7038         struct pqi_scsi_dev *device;
7039         unsigned long flags;
7040         u8 unique_id[16];
7041
7042         sdev = to_scsi_device(dev);
7043         ctrl_info = shost_to_hba(sdev->host);
7044
7045         if (pqi_ctrl_offline(ctrl_info))
7046                 return -ENODEV;
7047
7048         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7049
7050         device = sdev->hostdata;
7051         if (!device) {
7052                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7053                 return -ENODEV;
7054         }
7055
7056         if (device->is_physical_device)
7057                 memcpy(unique_id, device->wwid, sizeof(device->wwid));
7058         else
7059                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
7060
7061         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7062
7063         return scnprintf(buffer, PAGE_SIZE,
7064                 "%02X%02X%02X%02X%02X%02X%02X%02X"
7065                 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
7066                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
7067                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
7068                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
7069                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
7070 }
7071
7072 static ssize_t pqi_lunid_show(struct device *dev,
7073         struct device_attribute *attr, char *buffer)
7074 {
7075         struct pqi_ctrl_info *ctrl_info;
7076         struct scsi_device *sdev;
7077         struct pqi_scsi_dev *device;
7078         unsigned long flags;
7079         u8 lunid[8];
7080
7081         sdev = to_scsi_device(dev);
7082         ctrl_info = shost_to_hba(sdev->host);
7083
7084         if (pqi_ctrl_offline(ctrl_info))
7085                 return -ENODEV;
7086
7087         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7088
7089         device = sdev->hostdata;
7090         if (!device) {
7091                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7092                 return -ENODEV;
7093         }
7094
7095         memcpy(lunid, device->scsi3addr, sizeof(lunid));
7096
7097         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7098
7099         return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
7100 }
7101
7102 #define MAX_PATHS       8
7103
7104 static ssize_t pqi_path_info_show(struct device *dev,
7105         struct device_attribute *attr, char *buf)
7106 {
7107         struct pqi_ctrl_info *ctrl_info;
7108         struct scsi_device *sdev;
7109         struct pqi_scsi_dev *device;
7110         unsigned long flags;
7111         int i;
7112         int output_len = 0;
7113         u8 box;
7114         u8 bay;
7115         u8 path_map_index;
7116         char *active;
7117         u8 phys_connector[2];
7118
7119         sdev = to_scsi_device(dev);
7120         ctrl_info = shost_to_hba(sdev->host);
7121
7122         if (pqi_ctrl_offline(ctrl_info))
7123                 return -ENODEV;
7124
7125         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7126
7127         device = sdev->hostdata;
7128         if (!device) {
7129                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7130                 return -ENODEV;
7131         }
7132
7133         bay = device->bay;
7134         for (i = 0; i < MAX_PATHS; i++) {
7135                 path_map_index = 1 << i;
7136                 if (i == device->active_path_index)
7137                         active = "Active";
7138                 else if (device->path_map & path_map_index)
7139                         active = "Inactive";
7140                 else
7141                         continue;
7142
7143                 output_len += scnprintf(buf + output_len,
7144                                         PAGE_SIZE - output_len,
7145                                         "[%d:%d:%d:%d] %20.20s ",
7146                                         ctrl_info->scsi_host->host_no,
7147                                         device->bus, device->target,
7148                                         device->lun,
7149                                         scsi_device_type(device->devtype));
7150
7151                 if (device->devtype == TYPE_RAID ||
7152                         pqi_is_logical_device(device))
7153                         goto end_buffer;
7154
7155                 memcpy(&phys_connector, &device->phys_connector[i],
7156                         sizeof(phys_connector));
7157                 if (phys_connector[0] < '0')
7158                         phys_connector[0] = '0';
7159                 if (phys_connector[1] < '0')
7160                         phys_connector[1] = '0';
7161
7162                 output_len += scnprintf(buf + output_len,
7163                                         PAGE_SIZE - output_len,
7164                                         "PORT: %.2s ", phys_connector);
7165
7166                 box = device->box[i];
7167                 if (box != 0 && box != 0xFF)
7168                         output_len += scnprintf(buf + output_len,
7169                                                 PAGE_SIZE - output_len,
7170                                                 "BOX: %hhu ", box);
7171
7172                 if ((device->devtype == TYPE_DISK ||
7173                         device->devtype == TYPE_ZBC) &&
7174                         pqi_expose_device(device))
7175                         output_len += scnprintf(buf + output_len,
7176                                                 PAGE_SIZE - output_len,
7177                                                 "BAY: %hhu ", bay);
7178
7179 end_buffer:
7180                 output_len += scnprintf(buf + output_len,
7181                                         PAGE_SIZE - output_len,
7182                                         "%s\n", active);
7183         }
7184
7185         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7186
7187         return output_len;
7188 }
7189
7190 static ssize_t pqi_sas_address_show(struct device *dev,
7191         struct device_attribute *attr, char *buffer)
7192 {
7193         struct pqi_ctrl_info *ctrl_info;
7194         struct scsi_device *sdev;
7195         struct pqi_scsi_dev *device;
7196         unsigned long flags;
7197         u64 sas_address;
7198
7199         sdev = to_scsi_device(dev);
7200         ctrl_info = shost_to_hba(sdev->host);
7201
7202         if (pqi_ctrl_offline(ctrl_info))
7203                 return -ENODEV;
7204
7205         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7206
7207         device = sdev->hostdata;
7208         if (!device) {
7209                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7210                 return -ENODEV;
7211         }
7212
7213         sas_address = device->sas_address;
7214
7215         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7216
7217         return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
7218 }
7219
7220 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
7221         struct device_attribute *attr, char *buffer)
7222 {
7223         struct pqi_ctrl_info *ctrl_info;
7224         struct scsi_device *sdev;
7225         struct pqi_scsi_dev *device;
7226         unsigned long flags;
7227
7228         sdev = to_scsi_device(dev);
7229         ctrl_info = shost_to_hba(sdev->host);
7230
7231         if (pqi_ctrl_offline(ctrl_info))
7232                 return -ENODEV;
7233
7234         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7235
7236         device = sdev->hostdata;
7237         if (!device) {
7238                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7239                 return -ENODEV;
7240         }
7241
7242         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
7243         buffer[1] = '\n';
7244         buffer[2] = '\0';
7245
7246         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7247
7248         return 2;
7249 }
7250
7251 static ssize_t pqi_raid_level_show(struct device *dev,
7252         struct device_attribute *attr, char *buffer)
7253 {
7254         struct pqi_ctrl_info *ctrl_info;
7255         struct scsi_device *sdev;
7256         struct pqi_scsi_dev *device;
7257         unsigned long flags;
7258         char *raid_level;
7259
7260         sdev = to_scsi_device(dev);
7261         ctrl_info = shost_to_hba(sdev->host);
7262
7263         if (pqi_ctrl_offline(ctrl_info))
7264                 return -ENODEV;
7265
7266         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7267
7268         device = sdev->hostdata;
7269         if (!device) {
7270                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7271                 return -ENODEV;
7272         }
7273
7274         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK)
7275                 raid_level = pqi_raid_level_to_string(device->raid_level);
7276         else
7277                 raid_level = "N/A";
7278
7279         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7280
7281         return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
7282 }
7283
7284 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
7285         struct device_attribute *attr, char *buffer)
7286 {
7287         struct pqi_ctrl_info *ctrl_info;
7288         struct scsi_device *sdev;
7289         struct pqi_scsi_dev *device;
7290         unsigned long flags;
7291         int raid_bypass_cnt;
7292
7293         sdev = to_scsi_device(dev);
7294         ctrl_info = shost_to_hba(sdev->host);
7295
7296         if (pqi_ctrl_offline(ctrl_info))
7297                 return -ENODEV;
7298
7299         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7300
7301         device = sdev->hostdata;
7302         if (!device) {
7303                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7304                 return -ENODEV;
7305         }
7306
7307         raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt);
7308
7309         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7310
7311         return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
7312 }
7313
7314 static ssize_t pqi_sas_ncq_prio_enable_show(struct device *dev,
7315                 struct device_attribute *attr, char *buf)
7316 {
7317         struct pqi_ctrl_info *ctrl_info;
7318         struct scsi_device *sdev;
7319         struct pqi_scsi_dev *device;
7320         unsigned long flags;
7321         int output_len = 0;
7322
7323         sdev = to_scsi_device(dev);
7324         ctrl_info = shost_to_hba(sdev->host);
7325
7326         if (pqi_ctrl_offline(ctrl_info))
7327                 return -ENODEV;
7328
7329         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7330
7331         device = sdev->hostdata;
7332         if (!device) {
7333                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7334                 return -ENODEV;
7335         }
7336
7337         output_len = snprintf(buf, PAGE_SIZE, "%d\n",
7338                                 device->ncq_prio_enable);
7339         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7340
7341         return output_len;
7342 }
7343
7344 static ssize_t pqi_sas_ncq_prio_enable_store(struct device *dev,
7345                         struct device_attribute *attr,
7346                         const char *buf, size_t count)
7347 {
7348         struct pqi_ctrl_info *ctrl_info;
7349         struct scsi_device *sdev;
7350         struct pqi_scsi_dev *device;
7351         unsigned long flags;
7352         u8 ncq_prio_enable = 0;
7353
7354         if (kstrtou8(buf, 0, &ncq_prio_enable))
7355                 return -EINVAL;
7356
7357         sdev = to_scsi_device(dev);
7358         ctrl_info = shost_to_hba(sdev->host);
7359
7360         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7361
7362         device = sdev->hostdata;
7363
7364         if (!device) {
7365                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7366                 return -ENODEV;
7367         }
7368
7369         if (!device->ncq_prio_support ||
7370                 !device->is_physical_device) {
7371                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7372                 return -EINVAL;
7373         }
7374
7375         device->ncq_prio_enable = ncq_prio_enable;
7376
7377         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7378
7379         return  strlen(buf);
7380 }
7381
7382 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
7383 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
7384 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
7385 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
7386 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
7387 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
7388 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
7389 static DEVICE_ATTR(sas_ncq_prio_enable, 0644,
7390                 pqi_sas_ncq_prio_enable_show, pqi_sas_ncq_prio_enable_store);
7391
7392 static struct attribute *pqi_sdev_attrs[] = {
7393         &dev_attr_lunid.attr,
7394         &dev_attr_unique_id.attr,
7395         &dev_attr_path_info.attr,
7396         &dev_attr_sas_address.attr,
7397         &dev_attr_ssd_smart_path_enabled.attr,
7398         &dev_attr_raid_level.attr,
7399         &dev_attr_raid_bypass_cnt.attr,
7400         &dev_attr_sas_ncq_prio_enable.attr,
7401         NULL
7402 };
7403
7404 ATTRIBUTE_GROUPS(pqi_sdev);
7405
7406 static struct scsi_host_template pqi_driver_template = {
7407         .module = THIS_MODULE,
7408         .name = DRIVER_NAME_SHORT,
7409         .proc_name = DRIVER_NAME_SHORT,
7410         .queuecommand = pqi_scsi_queue_command,
7411         .scan_start = pqi_scan_start,
7412         .scan_finished = pqi_scan_finished,
7413         .this_id = -1,
7414         .eh_device_reset_handler = pqi_eh_device_reset_handler,
7415         .ioctl = pqi_ioctl,
7416         .slave_alloc = pqi_slave_alloc,
7417         .slave_configure = pqi_slave_configure,
7418         .slave_destroy = pqi_slave_destroy,
7419         .map_queues = pqi_map_queues,
7420         .sdev_groups = pqi_sdev_groups,
7421         .shost_groups = pqi_shost_groups,
7422         .cmd_size = sizeof(struct pqi_cmd_priv),
7423 };
7424
7425 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
7426 {
7427         int rc;
7428         struct Scsi_Host *shost;
7429
7430         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
7431         if (!shost) {
7432                 dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
7433                 return -ENOMEM;
7434         }
7435
7436         shost->io_port = 0;
7437         shost->n_io_port = 0;
7438         shost->this_id = -1;
7439         shost->max_channel = PQI_MAX_BUS;
7440         shost->max_cmd_len = MAX_COMMAND_SIZE;
7441         shost->max_lun = PQI_MAX_LUNS_PER_DEVICE;
7442         shost->max_id = ~0;
7443         shost->max_sectors = ctrl_info->max_sectors;
7444         shost->can_queue = ctrl_info->scsi_ml_can_queue;
7445         shost->cmd_per_lun = shost->can_queue;
7446         shost->sg_tablesize = ctrl_info->sg_tablesize;
7447         shost->transportt = pqi_sas_transport_template;
7448         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
7449         shost->unique_id = shost->irq;
7450         shost->nr_hw_queues = ctrl_info->num_queue_groups;
7451         shost->host_tagset = 1;
7452         shost->hostdata[0] = (unsigned long)ctrl_info;
7453
7454         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
7455         if (rc) {
7456                 dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
7457                 goto free_host;
7458         }
7459
7460         rc = pqi_add_sas_host(shost, ctrl_info);
7461         if (rc) {
7462                 dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
7463                 goto remove_host;
7464         }
7465
7466         ctrl_info->scsi_host = shost;
7467
7468         return 0;
7469
7470 remove_host:
7471         scsi_remove_host(shost);
7472 free_host:
7473         scsi_host_put(shost);
7474
7475         return rc;
7476 }
7477
7478 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
7479 {
7480         struct Scsi_Host *shost;
7481
7482         pqi_delete_sas_host(ctrl_info);
7483
7484         shost = ctrl_info->scsi_host;
7485         if (!shost)
7486                 return;
7487
7488         scsi_remove_host(shost);
7489         scsi_host_put(shost);
7490 }
7491
7492 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
7493 {
7494         int rc = 0;
7495         struct pqi_device_registers __iomem *pqi_registers;
7496         unsigned long timeout;
7497         unsigned int timeout_msecs;
7498         union pqi_reset_register reset_reg;
7499
7500         pqi_registers = ctrl_info->pqi_registers;
7501         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
7502         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
7503
7504         while (1) {
7505                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
7506                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
7507                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
7508                         break;
7509                 if (!sis_is_firmware_running(ctrl_info)) {
7510                         rc = -ENXIO;
7511                         break;
7512                 }
7513                 if (time_after(jiffies, timeout)) {
7514                         rc = -ETIMEDOUT;
7515                         break;
7516                 }
7517         }
7518
7519         return rc;
7520 }
7521
7522 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
7523 {
7524         int rc;
7525         union pqi_reset_register reset_reg;
7526
7527         if (ctrl_info->pqi_reset_quiesce_supported) {
7528                 rc = sis_pqi_reset_quiesce(ctrl_info);
7529                 if (rc) {
7530                         dev_err(&ctrl_info->pci_dev->dev,
7531                                 "PQI reset failed during quiesce with error %d\n", rc);
7532                         return rc;
7533                 }
7534         }
7535
7536         reset_reg.all_bits = 0;
7537         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
7538         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
7539
7540         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
7541
7542         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
7543         if (rc)
7544                 dev_err(&ctrl_info->pci_dev->dev,
7545                         "PQI reset failed with error %d\n", rc);
7546
7547         return rc;
7548 }
7549
7550 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
7551 {
7552         int rc;
7553         struct bmic_sense_subsystem_info *sense_info;
7554
7555         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
7556         if (!sense_info)
7557                 return -ENOMEM;
7558
7559         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
7560         if (rc)
7561                 goto out;
7562
7563         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
7564                 sizeof(sense_info->ctrl_serial_number));
7565         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
7566
7567 out:
7568         kfree(sense_info);
7569
7570         return rc;
7571 }
7572
7573 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
7574 {
7575         int rc;
7576         struct bmic_identify_controller *identify;
7577
7578         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
7579         if (!identify)
7580                 return -ENOMEM;
7581
7582         rc = pqi_identify_controller(ctrl_info, identify);
7583         if (rc)
7584                 goto out;
7585
7586         if (get_unaligned_le32(&identify->extra_controller_flags) &
7587                 BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
7588                 memcpy(ctrl_info->firmware_version,
7589                         identify->firmware_version_long,
7590                         sizeof(identify->firmware_version_long));
7591         } else {
7592                 memcpy(ctrl_info->firmware_version,
7593                         identify->firmware_version_short,
7594                         sizeof(identify->firmware_version_short));
7595                 ctrl_info->firmware_version
7596                         [sizeof(identify->firmware_version_short)] = '\0';
7597                 snprintf(ctrl_info->firmware_version +
7598                         strlen(ctrl_info->firmware_version),
7599                         sizeof(ctrl_info->firmware_version) -
7600                         sizeof(identify->firmware_version_short),
7601                         "-%u",
7602                         get_unaligned_le16(&identify->firmware_build_number));
7603         }
7604
7605         memcpy(ctrl_info->model, identify->product_id,
7606                 sizeof(identify->product_id));
7607         ctrl_info->model[sizeof(identify->product_id)] = '\0';
7608
7609         memcpy(ctrl_info->vendor, identify->vendor_id,
7610                 sizeof(identify->vendor_id));
7611         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
7612
7613         dev_info(&ctrl_info->pci_dev->dev,
7614                 "Firmware version: %s\n", ctrl_info->firmware_version);
7615
7616 out:
7617         kfree(identify);
7618
7619         return rc;
7620 }
7621
7622 struct pqi_config_table_section_info {
7623         struct pqi_ctrl_info *ctrl_info;
7624         void            *section;
7625         u32             section_offset;
7626         void __iomem    *section_iomem_addr;
7627 };
7628
7629 static inline bool pqi_is_firmware_feature_supported(
7630         struct pqi_config_table_firmware_features *firmware_features,
7631         unsigned int bit_position)
7632 {
7633         unsigned int byte_index;
7634
7635         byte_index = bit_position / BITS_PER_BYTE;
7636
7637         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
7638                 return false;
7639
7640         return firmware_features->features_supported[byte_index] &
7641                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7642 }
7643
7644 static inline bool pqi_is_firmware_feature_enabled(
7645         struct pqi_config_table_firmware_features *firmware_features,
7646         void __iomem *firmware_features_iomem_addr,
7647         unsigned int bit_position)
7648 {
7649         unsigned int byte_index;
7650         u8 __iomem *features_enabled_iomem_addr;
7651
7652         byte_index = (bit_position / BITS_PER_BYTE) +
7653                 (le16_to_cpu(firmware_features->num_elements) * 2);
7654
7655         features_enabled_iomem_addr = firmware_features_iomem_addr +
7656                 offsetof(struct pqi_config_table_firmware_features,
7657                         features_supported) + byte_index;
7658
7659         return *((__force u8 *)features_enabled_iomem_addr) &
7660                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7661 }
7662
7663 static inline void pqi_request_firmware_feature(
7664         struct pqi_config_table_firmware_features *firmware_features,
7665         unsigned int bit_position)
7666 {
7667         unsigned int byte_index;
7668
7669         byte_index = (bit_position / BITS_PER_BYTE) +
7670                 le16_to_cpu(firmware_features->num_elements);
7671
7672         firmware_features->features_supported[byte_index] |=
7673                 (1 << (bit_position % BITS_PER_BYTE));
7674 }
7675
7676 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
7677         u16 first_section, u16 last_section)
7678 {
7679         struct pqi_vendor_general_request request;
7680
7681         memset(&request, 0, sizeof(request));
7682
7683         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7684         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7685                 &request.header.iu_length);
7686         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
7687                 &request.function_code);
7688         put_unaligned_le16(first_section,
7689                 &request.data.config_table_update.first_section);
7690         put_unaligned_le16(last_section,
7691                 &request.data.config_table_update.last_section);
7692
7693         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
7694 }
7695
7696 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
7697         struct pqi_config_table_firmware_features *firmware_features,
7698         void __iomem *firmware_features_iomem_addr)
7699 {
7700         void *features_requested;
7701         void __iomem *features_requested_iomem_addr;
7702         void __iomem *host_max_known_feature_iomem_addr;
7703
7704         features_requested = firmware_features->features_supported +
7705                 le16_to_cpu(firmware_features->num_elements);
7706
7707         features_requested_iomem_addr = firmware_features_iomem_addr +
7708                 (features_requested - (void *)firmware_features);
7709
7710         memcpy_toio(features_requested_iomem_addr, features_requested,
7711                 le16_to_cpu(firmware_features->num_elements));
7712
7713         if (pqi_is_firmware_feature_supported(firmware_features,
7714                 PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
7715                 host_max_known_feature_iomem_addr =
7716                         features_requested_iomem_addr +
7717                         (le16_to_cpu(firmware_features->num_elements) * 2) +
7718                         sizeof(__le16);
7719                 writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
7720                         host_max_known_feature_iomem_addr);
7721         }
7722
7723         return pqi_config_table_update(ctrl_info,
7724                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
7725                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
7726 }
7727
7728 struct pqi_firmware_feature {
7729         char            *feature_name;
7730         unsigned int    feature_bit;
7731         bool            supported;
7732         bool            enabled;
7733         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
7734                 struct pqi_firmware_feature *firmware_feature);
7735 };
7736
7737 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
7738         struct pqi_firmware_feature *firmware_feature)
7739 {
7740         if (!firmware_feature->supported) {
7741                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
7742                         firmware_feature->feature_name);
7743                 return;
7744         }
7745
7746         if (firmware_feature->enabled) {
7747                 dev_info(&ctrl_info->pci_dev->dev,
7748                         "%s enabled\n", firmware_feature->feature_name);
7749                 return;
7750         }
7751
7752         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
7753                 firmware_feature->feature_name);
7754 }
7755
7756 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
7757         struct pqi_firmware_feature *firmware_feature)
7758 {
7759         switch (firmware_feature->feature_bit) {
7760         case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
7761                 ctrl_info->enable_r1_writes = firmware_feature->enabled;
7762                 break;
7763         case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
7764                 ctrl_info->enable_r5_writes = firmware_feature->enabled;
7765                 break;
7766         case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
7767                 ctrl_info->enable_r6_writes = firmware_feature->enabled;
7768                 break;
7769         case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
7770                 ctrl_info->soft_reset_handshake_supported =
7771                         firmware_feature->enabled &&
7772                         pqi_read_soft_reset_status(ctrl_info);
7773                 break;
7774         case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
7775                 ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
7776                 break;
7777         case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
7778                 ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
7779                 break;
7780         case PQI_FIRMWARE_FEATURE_FW_TRIAGE:
7781                 ctrl_info->firmware_triage_supported = firmware_feature->enabled;
7782                 pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
7783                 break;
7784         case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
7785                 ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
7786                 break;
7787         case PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT:
7788                 ctrl_info->multi_lun_device_supported = firmware_feature->enabled;
7789                 break;
7790         }
7791
7792         pqi_firmware_feature_status(ctrl_info, firmware_feature);
7793 }
7794
7795 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
7796         struct pqi_firmware_feature *firmware_feature)
7797 {
7798         if (firmware_feature->feature_status)
7799                 firmware_feature->feature_status(ctrl_info, firmware_feature);
7800 }
7801
7802 static DEFINE_MUTEX(pqi_firmware_features_mutex);
7803
7804 static struct pqi_firmware_feature pqi_firmware_features[] = {
7805         {
7806                 .feature_name = "Online Firmware Activation",
7807                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
7808                 .feature_status = pqi_firmware_feature_status,
7809         },
7810         {
7811                 .feature_name = "Serial Management Protocol",
7812                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
7813                 .feature_status = pqi_firmware_feature_status,
7814         },
7815         {
7816                 .feature_name = "Maximum Known Feature",
7817                 .feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
7818                 .feature_status = pqi_firmware_feature_status,
7819         },
7820         {
7821                 .feature_name = "RAID 0 Read Bypass",
7822                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
7823                 .feature_status = pqi_firmware_feature_status,
7824         },
7825         {
7826                 .feature_name = "RAID 1 Read Bypass",
7827                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
7828                 .feature_status = pqi_firmware_feature_status,
7829         },
7830         {
7831                 .feature_name = "RAID 5 Read Bypass",
7832                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
7833                 .feature_status = pqi_firmware_feature_status,
7834         },
7835         {
7836                 .feature_name = "RAID 6 Read Bypass",
7837                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
7838                 .feature_status = pqi_firmware_feature_status,
7839         },
7840         {
7841                 .feature_name = "RAID 0 Write Bypass",
7842                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
7843                 .feature_status = pqi_firmware_feature_status,
7844         },
7845         {
7846                 .feature_name = "RAID 1 Write Bypass",
7847                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
7848                 .feature_status = pqi_ctrl_update_feature_flags,
7849         },
7850         {
7851                 .feature_name = "RAID 5 Write Bypass",
7852                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
7853                 .feature_status = pqi_ctrl_update_feature_flags,
7854         },
7855         {
7856                 .feature_name = "RAID 6 Write Bypass",
7857                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
7858                 .feature_status = pqi_ctrl_update_feature_flags,
7859         },
7860         {
7861                 .feature_name = "New Soft Reset Handshake",
7862                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
7863                 .feature_status = pqi_ctrl_update_feature_flags,
7864         },
7865         {
7866                 .feature_name = "RAID IU Timeout",
7867                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
7868                 .feature_status = pqi_ctrl_update_feature_flags,
7869         },
7870         {
7871                 .feature_name = "TMF IU Timeout",
7872                 .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
7873                 .feature_status = pqi_ctrl_update_feature_flags,
7874         },
7875         {
7876                 .feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
7877                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
7878                 .feature_status = pqi_firmware_feature_status,
7879         },
7880         {
7881                 .feature_name = "Firmware Triage",
7882                 .feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
7883                 .feature_status = pqi_ctrl_update_feature_flags,
7884         },
7885         {
7886                 .feature_name = "RPL Extended Formats 4 and 5",
7887                 .feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
7888                 .feature_status = pqi_ctrl_update_feature_flags,
7889         },
7890         {
7891                 .feature_name = "Multi-LUN Target",
7892                 .feature_bit = PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT,
7893                 .feature_status = pqi_ctrl_update_feature_flags,
7894         },
7895 };
7896
7897 static void pqi_process_firmware_features(
7898         struct pqi_config_table_section_info *section_info)
7899 {
7900         int rc;
7901         struct pqi_ctrl_info *ctrl_info;
7902         struct pqi_config_table_firmware_features *firmware_features;
7903         void __iomem *firmware_features_iomem_addr;
7904         unsigned int i;
7905         unsigned int num_features_supported;
7906
7907         ctrl_info = section_info->ctrl_info;
7908         firmware_features = section_info->section;
7909         firmware_features_iomem_addr = section_info->section_iomem_addr;
7910
7911         for (i = 0, num_features_supported = 0;
7912                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
7913                 if (pqi_is_firmware_feature_supported(firmware_features,
7914                         pqi_firmware_features[i].feature_bit)) {
7915                         pqi_firmware_features[i].supported = true;
7916                         num_features_supported++;
7917                 } else {
7918                         pqi_firmware_feature_update(ctrl_info,
7919                                 &pqi_firmware_features[i]);
7920                 }
7921         }
7922
7923         if (num_features_supported == 0)
7924                 return;
7925
7926         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7927                 if (!pqi_firmware_features[i].supported)
7928                         continue;
7929                 pqi_request_firmware_feature(firmware_features,
7930                         pqi_firmware_features[i].feature_bit);
7931         }
7932
7933         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
7934                 firmware_features_iomem_addr);
7935         if (rc) {
7936                 dev_err(&ctrl_info->pci_dev->dev,
7937                         "failed to enable firmware features in PQI configuration table\n");
7938                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7939                         if (!pqi_firmware_features[i].supported)
7940                                 continue;
7941                         pqi_firmware_feature_update(ctrl_info,
7942                                 &pqi_firmware_features[i]);
7943                 }
7944                 return;
7945         }
7946
7947         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7948                 if (!pqi_firmware_features[i].supported)
7949                         continue;
7950                 if (pqi_is_firmware_feature_enabled(firmware_features,
7951                         firmware_features_iomem_addr,
7952                         pqi_firmware_features[i].feature_bit)) {
7953                                 pqi_firmware_features[i].enabled = true;
7954                 }
7955                 pqi_firmware_feature_update(ctrl_info,
7956                         &pqi_firmware_features[i]);
7957         }
7958 }
7959
7960 static void pqi_init_firmware_features(void)
7961 {
7962         unsigned int i;
7963
7964         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7965                 pqi_firmware_features[i].supported = false;
7966                 pqi_firmware_features[i].enabled = false;
7967         }
7968 }
7969
7970 static void pqi_process_firmware_features_section(
7971         struct pqi_config_table_section_info *section_info)
7972 {
7973         mutex_lock(&pqi_firmware_features_mutex);
7974         pqi_init_firmware_features();
7975         pqi_process_firmware_features(section_info);
7976         mutex_unlock(&pqi_firmware_features_mutex);
7977 }
7978
7979 /*
7980  * Reset all controller settings that can be initialized during the processing
7981  * of the PQI Configuration Table.
7982  */
7983
7984 static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
7985 {
7986         ctrl_info->heartbeat_counter = NULL;
7987         ctrl_info->soft_reset_status = NULL;
7988         ctrl_info->soft_reset_handshake_supported = false;
7989         ctrl_info->enable_r1_writes = false;
7990         ctrl_info->enable_r5_writes = false;
7991         ctrl_info->enable_r6_writes = false;
7992         ctrl_info->raid_iu_timeout_supported = false;
7993         ctrl_info->tmf_iu_timeout_supported = false;
7994         ctrl_info->firmware_triage_supported = false;
7995         ctrl_info->rpl_extended_format_4_5_supported = false;
7996         ctrl_info->multi_lun_device_supported = false;
7997 }
7998
7999 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
8000 {
8001         u32 table_length;
8002         u32 section_offset;
8003         bool firmware_feature_section_present;
8004         void __iomem *table_iomem_addr;
8005         struct pqi_config_table *config_table;
8006         struct pqi_config_table_section_header *section;
8007         struct pqi_config_table_section_info section_info;
8008         struct pqi_config_table_section_info feature_section_info = {0};
8009
8010         table_length = ctrl_info->config_table_length;
8011         if (table_length == 0)
8012                 return 0;
8013
8014         config_table = kmalloc(table_length, GFP_KERNEL);
8015         if (!config_table) {
8016                 dev_err(&ctrl_info->pci_dev->dev,
8017                         "failed to allocate memory for PQI configuration table\n");
8018                 return -ENOMEM;
8019         }
8020
8021         /*
8022          * Copy the config table contents from I/O memory space into the
8023          * temporary buffer.
8024          */
8025         table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
8026         memcpy_fromio(config_table, table_iomem_addr, table_length);
8027
8028         firmware_feature_section_present = false;
8029         section_info.ctrl_info = ctrl_info;
8030         section_offset = get_unaligned_le32(&config_table->first_section_offset);
8031
8032         while (section_offset) {
8033                 section = (void *)config_table + section_offset;
8034
8035                 section_info.section = section;
8036                 section_info.section_offset = section_offset;
8037                 section_info.section_iomem_addr = table_iomem_addr + section_offset;
8038
8039                 switch (get_unaligned_le16(&section->section_id)) {
8040                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
8041                         firmware_feature_section_present = true;
8042                         feature_section_info = section_info;
8043                         break;
8044                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
8045                         if (pqi_disable_heartbeat)
8046                                 dev_warn(&ctrl_info->pci_dev->dev,
8047                                 "heartbeat disabled by module parameter\n");
8048                         else
8049                                 ctrl_info->heartbeat_counter =
8050                                         table_iomem_addr +
8051                                         section_offset +
8052                                         offsetof(struct pqi_config_table_heartbeat,
8053                                                 heartbeat_counter);
8054                         break;
8055                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
8056                         ctrl_info->soft_reset_status =
8057                                 table_iomem_addr +
8058                                 section_offset +
8059                                 offsetof(struct pqi_config_table_soft_reset,
8060                                         soft_reset_status);
8061                         break;
8062                 }
8063
8064                 section_offset = get_unaligned_le16(&section->next_section_offset);
8065         }
8066
8067         /*
8068          * We process the firmware feature section after all other sections
8069          * have been processed so that the feature bit callbacks can take
8070          * into account the settings configured by other sections.
8071          */
8072         if (firmware_feature_section_present)
8073                 pqi_process_firmware_features_section(&feature_section_info);
8074
8075         kfree(config_table);
8076
8077         return 0;
8078 }
8079
8080 /* Switches the controller from PQI mode back into SIS mode. */
8081
8082 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
8083 {
8084         int rc;
8085
8086         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
8087         rc = pqi_reset(ctrl_info);
8088         if (rc)
8089                 return rc;
8090         rc = sis_reenable_sis_mode(ctrl_info);
8091         if (rc) {
8092                 dev_err(&ctrl_info->pci_dev->dev,
8093                         "re-enabling SIS mode failed with error %d\n", rc);
8094                 return rc;
8095         }
8096         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8097
8098         return 0;
8099 }
8100
8101 /*
8102  * If the controller isn't already in SIS mode, this function forces it into
8103  * SIS mode.
8104  */
8105
8106 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
8107 {
8108         if (!sis_is_firmware_running(ctrl_info))
8109                 return -ENXIO;
8110
8111         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
8112                 return 0;
8113
8114         if (sis_is_kernel_up(ctrl_info)) {
8115                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
8116                 return 0;
8117         }
8118
8119         return pqi_revert_to_sis_mode(ctrl_info);
8120 }
8121
8122 static void pqi_perform_lockup_action(void)
8123 {
8124         switch (pqi_lockup_action) {
8125         case PANIC:
8126                 panic("FATAL: Smart Family Controller lockup detected");
8127                 break;
8128         case REBOOT:
8129                 emergency_restart();
8130                 break;
8131         case NONE:
8132         default:
8133                 break;
8134         }
8135 }
8136
8137 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
8138 {
8139         int rc;
8140         u32 product_id;
8141
8142         if (reset_devices) {
8143                 if (pqi_is_fw_triage_supported(ctrl_info)) {
8144                         rc = sis_wait_for_fw_triage_completion(ctrl_info);
8145                         if (rc)
8146                                 return rc;
8147                 }
8148                 sis_soft_reset(ctrl_info);
8149                 ssleep(PQI_POST_RESET_DELAY_SECS);
8150         } else {
8151                 rc = pqi_force_sis_mode(ctrl_info);
8152                 if (rc)
8153                         return rc;
8154         }
8155
8156         /*
8157          * Wait until the controller is ready to start accepting SIS
8158          * commands.
8159          */
8160         rc = sis_wait_for_ctrl_ready(ctrl_info);
8161         if (rc) {
8162                 if (reset_devices) {
8163                         dev_err(&ctrl_info->pci_dev->dev,
8164                                 "kdump init failed with error %d\n", rc);
8165                         pqi_lockup_action = REBOOT;
8166                         pqi_perform_lockup_action();
8167                 }
8168                 return rc;
8169         }
8170
8171         /*
8172          * Get the controller properties.  This allows us to determine
8173          * whether or not it supports PQI mode.
8174          */
8175         rc = sis_get_ctrl_properties(ctrl_info);
8176         if (rc) {
8177                 dev_err(&ctrl_info->pci_dev->dev,
8178                         "error obtaining controller properties\n");
8179                 return rc;
8180         }
8181
8182         rc = sis_get_pqi_capabilities(ctrl_info);
8183         if (rc) {
8184                 dev_err(&ctrl_info->pci_dev->dev,
8185                         "error obtaining controller capabilities\n");
8186                 return rc;
8187         }
8188
8189         product_id = sis_get_product_id(ctrl_info);
8190         ctrl_info->product_id = (u8)product_id;
8191         ctrl_info->product_revision = (u8)(product_id >> 8);
8192
8193         if (reset_devices) {
8194                 if (ctrl_info->max_outstanding_requests >
8195                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
8196                                 ctrl_info->max_outstanding_requests =
8197                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
8198         } else {
8199                 if (ctrl_info->max_outstanding_requests >
8200                         PQI_MAX_OUTSTANDING_REQUESTS)
8201                                 ctrl_info->max_outstanding_requests =
8202                                         PQI_MAX_OUTSTANDING_REQUESTS;
8203         }
8204
8205         pqi_calculate_io_resources(ctrl_info);
8206
8207         rc = pqi_alloc_error_buffer(ctrl_info);
8208         if (rc) {
8209                 dev_err(&ctrl_info->pci_dev->dev,
8210                         "failed to allocate PQI error buffer\n");
8211                 return rc;
8212         }
8213
8214         /*
8215          * If the function we are about to call succeeds, the
8216          * controller will transition from legacy SIS mode
8217          * into PQI mode.
8218          */
8219         rc = sis_init_base_struct_addr(ctrl_info);
8220         if (rc) {
8221                 dev_err(&ctrl_info->pci_dev->dev,
8222                         "error initializing PQI mode\n");
8223                 return rc;
8224         }
8225
8226         /* Wait for the controller to complete the SIS -> PQI transition. */
8227         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8228         if (rc) {
8229                 dev_err(&ctrl_info->pci_dev->dev,
8230                         "transition to PQI mode failed\n");
8231                 return rc;
8232         }
8233
8234         /* From here on, we are running in PQI mode. */
8235         ctrl_info->pqi_mode_enabled = true;
8236         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8237
8238         rc = pqi_alloc_admin_queues(ctrl_info);
8239         if (rc) {
8240                 dev_err(&ctrl_info->pci_dev->dev,
8241                         "failed to allocate admin queues\n");
8242                 return rc;
8243         }
8244
8245         rc = pqi_create_admin_queues(ctrl_info);
8246         if (rc) {
8247                 dev_err(&ctrl_info->pci_dev->dev,
8248                         "error creating admin queues\n");
8249                 return rc;
8250         }
8251
8252         rc = pqi_report_device_capability(ctrl_info);
8253         if (rc) {
8254                 dev_err(&ctrl_info->pci_dev->dev,
8255                         "obtaining device capability failed\n");
8256                 return rc;
8257         }
8258
8259         rc = pqi_validate_device_capability(ctrl_info);
8260         if (rc)
8261                 return rc;
8262
8263         pqi_calculate_queue_resources(ctrl_info);
8264
8265         rc = pqi_enable_msix_interrupts(ctrl_info);
8266         if (rc)
8267                 return rc;
8268
8269         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
8270                 ctrl_info->max_msix_vectors =
8271                         ctrl_info->num_msix_vectors_enabled;
8272                 pqi_calculate_queue_resources(ctrl_info);
8273         }
8274
8275         rc = pqi_alloc_io_resources(ctrl_info);
8276         if (rc)
8277                 return rc;
8278
8279         rc = pqi_alloc_operational_queues(ctrl_info);
8280         if (rc) {
8281                 dev_err(&ctrl_info->pci_dev->dev,
8282                         "failed to allocate operational queues\n");
8283                 return rc;
8284         }
8285
8286         pqi_init_operational_queues(ctrl_info);
8287
8288         rc = pqi_create_queues(ctrl_info);
8289         if (rc)
8290                 return rc;
8291
8292         rc = pqi_request_irqs(ctrl_info);
8293         if (rc)
8294                 return rc;
8295
8296         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8297
8298         ctrl_info->controller_online = true;
8299
8300         rc = pqi_process_config_table(ctrl_info);
8301         if (rc)
8302                 return rc;
8303
8304         pqi_start_heartbeat_timer(ctrl_info);
8305
8306         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8307                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8308                 if (rc) { /* Supported features not returned correctly. */
8309                         dev_err(&ctrl_info->pci_dev->dev,
8310                                 "error obtaining advanced RAID bypass configuration\n");
8311                         return rc;
8312                 }
8313                 ctrl_info->ciss_report_log_flags |=
8314                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8315         }
8316
8317         rc = pqi_enable_events(ctrl_info);
8318         if (rc) {
8319                 dev_err(&ctrl_info->pci_dev->dev,
8320                         "error enabling events\n");
8321                 return rc;
8322         }
8323
8324         /* Register with the SCSI subsystem. */
8325         rc = pqi_register_scsi(ctrl_info);
8326         if (rc)
8327                 return rc;
8328
8329         rc = pqi_get_ctrl_product_details(ctrl_info);
8330         if (rc) {
8331                 dev_err(&ctrl_info->pci_dev->dev,
8332                         "error obtaining product details\n");
8333                 return rc;
8334         }
8335
8336         rc = pqi_get_ctrl_serial_number(ctrl_info);
8337         if (rc) {
8338                 dev_err(&ctrl_info->pci_dev->dev,
8339                         "error obtaining ctrl serial number\n");
8340                 return rc;
8341         }
8342
8343         rc = pqi_set_diag_rescan(ctrl_info);
8344         if (rc) {
8345                 dev_err(&ctrl_info->pci_dev->dev,
8346                         "error enabling multi-lun rescan\n");
8347                 return rc;
8348         }
8349
8350         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8351         if (rc) {
8352                 dev_err(&ctrl_info->pci_dev->dev,
8353                         "error updating host wellness\n");
8354                 return rc;
8355         }
8356
8357         pqi_schedule_update_time_worker(ctrl_info);
8358
8359         pqi_scan_scsi_devices(ctrl_info);
8360
8361         return 0;
8362 }
8363
8364 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
8365 {
8366         unsigned int i;
8367         struct pqi_admin_queues *admin_queues;
8368         struct pqi_event_queue *event_queue;
8369
8370         admin_queues = &ctrl_info->admin_queues;
8371         admin_queues->iq_pi_copy = 0;
8372         admin_queues->oq_ci_copy = 0;
8373         writel(0, admin_queues->oq_pi);
8374
8375         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
8376                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
8377                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
8378                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
8379
8380                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
8381                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
8382                 writel(0, ctrl_info->queue_groups[i].oq_pi);
8383         }
8384
8385         event_queue = &ctrl_info->event_queue;
8386         writel(0, event_queue->oq_pi);
8387         event_queue->oq_ci_copy = 0;
8388 }
8389
8390 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
8391 {
8392         int rc;
8393
8394         rc = pqi_force_sis_mode(ctrl_info);
8395         if (rc)
8396                 return rc;
8397
8398         /*
8399          * Wait until the controller is ready to start accepting SIS
8400          * commands.
8401          */
8402         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
8403         if (rc)
8404                 return rc;
8405
8406         /*
8407          * Get the controller properties.  This allows us to determine
8408          * whether or not it supports PQI mode.
8409          */
8410         rc = sis_get_ctrl_properties(ctrl_info);
8411         if (rc) {
8412                 dev_err(&ctrl_info->pci_dev->dev,
8413                         "error obtaining controller properties\n");
8414                 return rc;
8415         }
8416
8417         rc = sis_get_pqi_capabilities(ctrl_info);
8418         if (rc) {
8419                 dev_err(&ctrl_info->pci_dev->dev,
8420                         "error obtaining controller capabilities\n");
8421                 return rc;
8422         }
8423
8424         /*
8425          * If the function we are about to call succeeds, the
8426          * controller will transition from legacy SIS mode
8427          * into PQI mode.
8428          */
8429         rc = sis_init_base_struct_addr(ctrl_info);
8430         if (rc) {
8431                 dev_err(&ctrl_info->pci_dev->dev,
8432                         "error initializing PQI mode\n");
8433                 return rc;
8434         }
8435
8436         /* Wait for the controller to complete the SIS -> PQI transition. */
8437         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8438         if (rc) {
8439                 dev_err(&ctrl_info->pci_dev->dev,
8440                         "transition to PQI mode failed\n");
8441                 return rc;
8442         }
8443
8444         /* From here on, we are running in PQI mode. */
8445         ctrl_info->pqi_mode_enabled = true;
8446         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8447
8448         pqi_reinit_queues(ctrl_info);
8449
8450         rc = pqi_create_admin_queues(ctrl_info);
8451         if (rc) {
8452                 dev_err(&ctrl_info->pci_dev->dev,
8453                         "error creating admin queues\n");
8454                 return rc;
8455         }
8456
8457         rc = pqi_create_queues(ctrl_info);
8458         if (rc)
8459                 return rc;
8460
8461         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8462
8463         ctrl_info->controller_online = true;
8464         pqi_ctrl_unblock_requests(ctrl_info);
8465
8466         pqi_ctrl_reset_config(ctrl_info);
8467
8468         rc = pqi_process_config_table(ctrl_info);
8469         if (rc)
8470                 return rc;
8471
8472         pqi_start_heartbeat_timer(ctrl_info);
8473
8474         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8475                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8476                 if (rc) {
8477                         dev_err(&ctrl_info->pci_dev->dev,
8478                                 "error obtaining advanced RAID bypass configuration\n");
8479                         return rc;
8480                 }
8481                 ctrl_info->ciss_report_log_flags |=
8482                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8483         }
8484
8485         rc = pqi_enable_events(ctrl_info);
8486         if (rc) {
8487                 dev_err(&ctrl_info->pci_dev->dev,
8488                         "error enabling events\n");
8489                 return rc;
8490         }
8491
8492         rc = pqi_get_ctrl_product_details(ctrl_info);
8493         if (rc) {
8494                 dev_err(&ctrl_info->pci_dev->dev,
8495                         "error obtaining product details\n");
8496                 return rc;
8497         }
8498
8499         rc = pqi_set_diag_rescan(ctrl_info);
8500         if (rc) {
8501                 dev_err(&ctrl_info->pci_dev->dev,
8502                         "error enabling multi-lun rescan\n");
8503                 return rc;
8504         }
8505
8506         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8507         if (rc) {
8508                 dev_err(&ctrl_info->pci_dev->dev,
8509                         "error updating host wellness\n");
8510                 return rc;
8511         }
8512
8513         if (pqi_ofa_in_progress(ctrl_info))
8514                 pqi_ctrl_unblock_scan(ctrl_info);
8515
8516         pqi_scan_scsi_devices(ctrl_info);
8517
8518         return 0;
8519 }
8520
8521 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
8522 {
8523         int rc;
8524
8525         rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
8526                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
8527
8528         return pcibios_err_to_errno(rc);
8529 }
8530
8531 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
8532 {
8533         int rc;
8534         u64 mask;
8535
8536         rc = pci_enable_device(ctrl_info->pci_dev);
8537         if (rc) {
8538                 dev_err(&ctrl_info->pci_dev->dev,
8539                         "failed to enable PCI device\n");
8540                 return rc;
8541         }
8542
8543         if (sizeof(dma_addr_t) > 4)
8544                 mask = DMA_BIT_MASK(64);
8545         else
8546                 mask = DMA_BIT_MASK(32);
8547
8548         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
8549         if (rc) {
8550                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
8551                 goto disable_device;
8552         }
8553
8554         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
8555         if (rc) {
8556                 dev_err(&ctrl_info->pci_dev->dev,
8557                         "failed to obtain PCI resources\n");
8558                 goto disable_device;
8559         }
8560
8561         ctrl_info->iomem_base = ioremap(pci_resource_start(
8562                 ctrl_info->pci_dev, 0),
8563                 sizeof(struct pqi_ctrl_registers));
8564         if (!ctrl_info->iomem_base) {
8565                 dev_err(&ctrl_info->pci_dev->dev,
8566                         "failed to map memory for controller registers\n");
8567                 rc = -ENOMEM;
8568                 goto release_regions;
8569         }
8570
8571 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
8572
8573         /* Increase the PCIe completion timeout. */
8574         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
8575                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
8576         if (rc) {
8577                 dev_err(&ctrl_info->pci_dev->dev,
8578                         "failed to set PCIe completion timeout\n");
8579                 goto release_regions;
8580         }
8581
8582         /* Enable bus mastering. */
8583         pci_set_master(ctrl_info->pci_dev);
8584
8585         ctrl_info->registers = ctrl_info->iomem_base;
8586         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
8587
8588         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
8589
8590         return 0;
8591
8592 release_regions:
8593         pci_release_regions(ctrl_info->pci_dev);
8594 disable_device:
8595         pci_disable_device(ctrl_info->pci_dev);
8596
8597         return rc;
8598 }
8599
8600 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
8601 {
8602         iounmap(ctrl_info->iomem_base);
8603         pci_release_regions(ctrl_info->pci_dev);
8604         if (pci_is_enabled(ctrl_info->pci_dev))
8605                 pci_disable_device(ctrl_info->pci_dev);
8606         pci_set_drvdata(ctrl_info->pci_dev, NULL);
8607 }
8608
8609 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
8610 {
8611         struct pqi_ctrl_info *ctrl_info;
8612
8613         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
8614                         GFP_KERNEL, numa_node);
8615         if (!ctrl_info)
8616                 return NULL;
8617
8618         mutex_init(&ctrl_info->scan_mutex);
8619         mutex_init(&ctrl_info->lun_reset_mutex);
8620         mutex_init(&ctrl_info->ofa_mutex);
8621
8622         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
8623         spin_lock_init(&ctrl_info->scsi_device_list_lock);
8624
8625         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
8626         atomic_set(&ctrl_info->num_interrupts, 0);
8627
8628         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
8629         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
8630
8631         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
8632         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
8633
8634         INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
8635         INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
8636
8637         sema_init(&ctrl_info->sync_request_sem,
8638                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
8639         init_waitqueue_head(&ctrl_info->block_requests_wait);
8640
8641         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
8642         ctrl_info->irq_mode = IRQ_MODE_NONE;
8643         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
8644
8645         ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
8646         ctrl_info->max_transfer_encrypted_sas_sata =
8647                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
8648         ctrl_info->max_transfer_encrypted_nvme =
8649                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
8650         ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
8651         ctrl_info->max_write_raid_1_10_2drive = ~0;
8652         ctrl_info->max_write_raid_1_10_3drive = ~0;
8653         ctrl_info->disable_managed_interrupts = pqi_disable_managed_interrupts;
8654
8655         return ctrl_info;
8656 }
8657
8658 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
8659 {
8660         kfree(ctrl_info);
8661 }
8662
8663 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
8664 {
8665         pqi_free_irqs(ctrl_info);
8666         pqi_disable_msix_interrupts(ctrl_info);
8667 }
8668
8669 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
8670 {
8671         pqi_free_interrupts(ctrl_info);
8672         if (ctrl_info->queue_memory_base)
8673                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8674                         ctrl_info->queue_memory_length,
8675                         ctrl_info->queue_memory_base,
8676                         ctrl_info->queue_memory_base_dma_handle);
8677         if (ctrl_info->admin_queue_memory_base)
8678                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8679                         ctrl_info->admin_queue_memory_length,
8680                         ctrl_info->admin_queue_memory_base,
8681                         ctrl_info->admin_queue_memory_base_dma_handle);
8682         pqi_free_all_io_requests(ctrl_info);
8683         if (ctrl_info->error_buffer)
8684                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8685                         ctrl_info->error_buffer_length,
8686                         ctrl_info->error_buffer,
8687                         ctrl_info->error_buffer_dma_handle);
8688         if (ctrl_info->iomem_base)
8689                 pqi_cleanup_pci_init(ctrl_info);
8690         pqi_free_ctrl_info(ctrl_info);
8691 }
8692
8693 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
8694 {
8695         ctrl_info->controller_online = false;
8696         pqi_stop_heartbeat_timer(ctrl_info);
8697         pqi_ctrl_block_requests(ctrl_info);
8698         pqi_cancel_rescan_worker(ctrl_info);
8699         pqi_cancel_update_time_worker(ctrl_info);
8700         if (ctrl_info->ctrl_removal_state == PQI_CTRL_SURPRISE_REMOVAL) {
8701                 pqi_fail_all_outstanding_requests(ctrl_info);
8702                 ctrl_info->pqi_mode_enabled = false;
8703         }
8704         pqi_unregister_scsi(ctrl_info);
8705         if (ctrl_info->pqi_mode_enabled)
8706                 pqi_revert_to_sis_mode(ctrl_info);
8707         pqi_free_ctrl_resources(ctrl_info);
8708 }
8709
8710 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
8711 {
8712         pqi_ctrl_block_scan(ctrl_info);
8713         pqi_scsi_block_requests(ctrl_info);
8714         pqi_ctrl_block_device_reset(ctrl_info);
8715         pqi_ctrl_block_requests(ctrl_info);
8716         pqi_ctrl_wait_until_quiesced(ctrl_info);
8717         pqi_stop_heartbeat_timer(ctrl_info);
8718 }
8719
8720 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
8721 {
8722         pqi_start_heartbeat_timer(ctrl_info);
8723         pqi_ctrl_unblock_requests(ctrl_info);
8724         pqi_ctrl_unblock_device_reset(ctrl_info);
8725         pqi_scsi_unblock_requests(ctrl_info);
8726         pqi_ctrl_unblock_scan(ctrl_info);
8727 }
8728
8729 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
8730 {
8731         int i;
8732         u32 sg_count;
8733         struct device *dev;
8734         struct pqi_ofa_memory *ofap;
8735         struct pqi_sg_descriptor *mem_descriptor;
8736         dma_addr_t dma_handle;
8737
8738         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8739
8740         sg_count = DIV_ROUND_UP(total_size, chunk_size);
8741         if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
8742                 goto out;
8743
8744         ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
8745         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
8746                 goto out;
8747
8748         dev = &ctrl_info->pci_dev->dev;
8749
8750         for (i = 0; i < sg_count; i++) {
8751                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
8752                         dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
8753                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
8754                         goto out_free_chunks;
8755                 mem_descriptor = &ofap->sg_descriptor[i];
8756                 put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
8757                 put_unaligned_le32(chunk_size, &mem_descriptor->length);
8758         }
8759
8760         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
8761         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
8762         put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
8763
8764         return 0;
8765
8766 out_free_chunks:
8767         while (--i >= 0) {
8768                 mem_descriptor = &ofap->sg_descriptor[i];
8769                 dma_free_coherent(dev, chunk_size,
8770                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8771                         get_unaligned_le64(&mem_descriptor->address));
8772         }
8773         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8774
8775 out:
8776         return -ENOMEM;
8777 }
8778
8779 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
8780 {
8781         u32 total_size;
8782         u32 chunk_size;
8783         u32 min_chunk_size;
8784
8785         if (ctrl_info->ofa_bytes_requested == 0)
8786                 return 0;
8787
8788         total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
8789         min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
8790         min_chunk_size = PAGE_ALIGN(min_chunk_size);
8791
8792         for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
8793                 if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
8794                         return 0;
8795                 chunk_size /= 2;
8796                 chunk_size = PAGE_ALIGN(chunk_size);
8797         }
8798
8799         return -ENOMEM;
8800 }
8801
8802 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
8803 {
8804         struct device *dev;
8805         struct pqi_ofa_memory *ofap;
8806
8807         dev = &ctrl_info->pci_dev->dev;
8808
8809         ofap = dma_alloc_coherent(dev, sizeof(*ofap),
8810                 &ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
8811         if (!ofap)
8812                 return;
8813
8814         ctrl_info->pqi_ofa_mem_virt_addr = ofap;
8815
8816         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
8817                 dev_err(dev,
8818                         "failed to allocate host buffer for Online Firmware Activation\n");
8819                 dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
8820                 ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8821                 return;
8822         }
8823
8824         put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
8825         memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
8826 }
8827
8828 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
8829 {
8830         unsigned int i;
8831         struct device *dev;
8832         struct pqi_ofa_memory *ofap;
8833         struct pqi_sg_descriptor *mem_descriptor;
8834         unsigned int num_memory_descriptors;
8835
8836         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8837         if (!ofap)
8838                 return;
8839
8840         dev = &ctrl_info->pci_dev->dev;
8841
8842         if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
8843                 goto out;
8844
8845         mem_descriptor = ofap->sg_descriptor;
8846         num_memory_descriptors =
8847                 get_unaligned_le16(&ofap->num_memory_descriptors);
8848
8849         for (i = 0; i < num_memory_descriptors; i++) {
8850                 dma_free_coherent(dev,
8851                         get_unaligned_le32(&mem_descriptor[i].length),
8852                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8853                         get_unaligned_le64(&mem_descriptor[i].address));
8854         }
8855         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8856
8857 out:
8858         dma_free_coherent(dev, sizeof(*ofap), ofap,
8859                 ctrl_info->pqi_ofa_mem_dma_handle);
8860         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8861 }
8862
8863 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
8864 {
8865         u32 buffer_length;
8866         struct pqi_vendor_general_request request;
8867         struct pqi_ofa_memory *ofap;
8868
8869         memset(&request, 0, sizeof(request));
8870
8871         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
8872         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
8873                 &request.header.iu_length);
8874         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
8875                 &request.function_code);
8876
8877         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8878
8879         if (ofap) {
8880                 buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
8881                         get_unaligned_le16(&ofap->num_memory_descriptors) *
8882                         sizeof(struct pqi_sg_descriptor);
8883
8884                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
8885                         &request.data.ofa_memory_allocation.buffer_address);
8886                 put_unaligned_le32(buffer_length,
8887                         &request.data.ofa_memory_allocation.buffer_length);
8888         }
8889
8890         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
8891 }
8892
8893 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
8894 {
8895         ssleep(delay_secs);
8896
8897         return pqi_ctrl_init_resume(ctrl_info);
8898 }
8899
8900 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
8901         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
8902         .status = SAM_STAT_CHECK_CONDITION,
8903 };
8904
8905 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
8906 {
8907         unsigned int i;
8908         struct pqi_io_request *io_request;
8909         struct scsi_cmnd *scmd;
8910         struct scsi_device *sdev;
8911
8912         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8913                 io_request = &ctrl_info->io_request_pool[i];
8914                 if (atomic_read(&io_request->refcount) == 0)
8915                         continue;
8916
8917                 scmd = io_request->scmd;
8918                 if (scmd) {
8919                         sdev = scmd->device;
8920                         if (!sdev || !scsi_device_online(sdev)) {
8921                                 pqi_free_io_request(io_request);
8922                                 continue;
8923                         } else {
8924                                 set_host_byte(scmd, DID_NO_CONNECT);
8925                         }
8926                 } else {
8927                         io_request->status = -ENXIO;
8928                         io_request->error_info =
8929                                 &pqi_ctrl_offline_raid_error_info;
8930                 }
8931
8932                 io_request->io_complete_callback(io_request,
8933                         io_request->context);
8934         }
8935 }
8936
8937 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
8938 {
8939         pqi_perform_lockup_action();
8940         pqi_stop_heartbeat_timer(ctrl_info);
8941         pqi_free_interrupts(ctrl_info);
8942         pqi_cancel_rescan_worker(ctrl_info);
8943         pqi_cancel_update_time_worker(ctrl_info);
8944         pqi_ctrl_wait_until_quiesced(ctrl_info);
8945         pqi_fail_all_outstanding_requests(ctrl_info);
8946         pqi_ctrl_unblock_requests(ctrl_info);
8947 }
8948
8949 static void pqi_ctrl_offline_worker(struct work_struct *work)
8950 {
8951         struct pqi_ctrl_info *ctrl_info;
8952
8953         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
8954         pqi_take_ctrl_offline_deferred(ctrl_info);
8955 }
8956
8957 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
8958         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
8959 {
8960         if (!ctrl_info->controller_online)
8961                 return;
8962
8963         ctrl_info->controller_online = false;
8964         ctrl_info->pqi_mode_enabled = false;
8965         pqi_ctrl_block_requests(ctrl_info);
8966         if (!pqi_disable_ctrl_shutdown)
8967                 sis_shutdown_ctrl(ctrl_info, ctrl_shutdown_reason);
8968         pci_disable_device(ctrl_info->pci_dev);
8969         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
8970         schedule_work(&ctrl_info->ctrl_offline_work);
8971 }
8972
8973 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
8974         const struct pci_device_id *id)
8975 {
8976         char *ctrl_description;
8977
8978         if (id->driver_data)
8979                 ctrl_description = (char *)id->driver_data;
8980         else
8981                 ctrl_description = "Microchip Smart Family Controller";
8982
8983         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
8984 }
8985
8986 static int pqi_pci_probe(struct pci_dev *pci_dev,
8987         const struct pci_device_id *id)
8988 {
8989         int rc;
8990         int node;
8991         struct pqi_ctrl_info *ctrl_info;
8992
8993         pqi_print_ctrl_info(pci_dev, id);
8994
8995         if (pqi_disable_device_id_wildcards &&
8996                 id->subvendor == PCI_ANY_ID &&
8997                 id->subdevice == PCI_ANY_ID) {
8998                 dev_warn(&pci_dev->dev,
8999                         "controller not probed because device ID wildcards are disabled\n");
9000                 return -ENODEV;
9001         }
9002
9003         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
9004                 dev_warn(&pci_dev->dev,
9005                         "controller device ID matched using wildcards\n");
9006
9007         node = dev_to_node(&pci_dev->dev);
9008         if (node == NUMA_NO_NODE) {
9009                 node = cpu_to_node(0);
9010                 if (node == NUMA_NO_NODE)
9011                         node = 0;
9012                 set_dev_node(&pci_dev->dev, node);
9013         }
9014
9015         ctrl_info = pqi_alloc_ctrl_info(node);
9016         if (!ctrl_info) {
9017                 dev_err(&pci_dev->dev,
9018                         "failed to allocate controller info block\n");
9019                 return -ENOMEM;
9020         }
9021
9022         ctrl_info->pci_dev = pci_dev;
9023
9024         rc = pqi_pci_init(ctrl_info);
9025         if (rc)
9026                 goto error;
9027
9028         rc = pqi_ctrl_init(ctrl_info);
9029         if (rc)
9030                 goto error;
9031
9032         return 0;
9033
9034 error:
9035         pqi_remove_ctrl(ctrl_info);
9036
9037         return rc;
9038 }
9039
9040 static void pqi_pci_remove(struct pci_dev *pci_dev)
9041 {
9042         struct pqi_ctrl_info *ctrl_info;
9043         u16 vendor_id;
9044         int rc;
9045
9046         ctrl_info = pci_get_drvdata(pci_dev);
9047         if (!ctrl_info)
9048                 return;
9049
9050         pci_read_config_word(ctrl_info->pci_dev, PCI_SUBSYSTEM_VENDOR_ID, &vendor_id);
9051         if (vendor_id == 0xffff)
9052                 ctrl_info->ctrl_removal_state = PQI_CTRL_SURPRISE_REMOVAL;
9053         else
9054                 ctrl_info->ctrl_removal_state = PQI_CTRL_GRACEFUL_REMOVAL;
9055
9056         if (ctrl_info->ctrl_removal_state == PQI_CTRL_GRACEFUL_REMOVAL) {
9057                 rc = pqi_flush_cache(ctrl_info, RESTART);
9058                 if (rc)
9059                         dev_err(&pci_dev->dev,
9060                                 "unable to flush controller cache during remove\n");
9061         }
9062
9063         pqi_remove_ctrl(ctrl_info);
9064 }
9065
9066 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
9067 {
9068         unsigned int i;
9069         struct pqi_io_request *io_request;
9070         struct scsi_cmnd *scmd;
9071
9072         for (i = 0; i < ctrl_info->max_io_slots; i++) {
9073                 io_request = &ctrl_info->io_request_pool[i];
9074                 if (atomic_read(&io_request->refcount) == 0)
9075                         continue;
9076                 scmd = io_request->scmd;
9077                 WARN_ON(scmd != NULL); /* IO command from SML */
9078                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
9079         }
9080 }
9081
9082 static void pqi_shutdown(struct pci_dev *pci_dev)
9083 {
9084         int rc;
9085         struct pqi_ctrl_info *ctrl_info;
9086         enum bmic_flush_cache_shutdown_event shutdown_event;
9087
9088         ctrl_info = pci_get_drvdata(pci_dev);
9089         if (!ctrl_info) {
9090                 dev_err(&pci_dev->dev,
9091                         "cache could not be flushed\n");
9092                 return;
9093         }
9094
9095         pqi_wait_until_ofa_finished(ctrl_info);
9096
9097         pqi_scsi_block_requests(ctrl_info);
9098         pqi_ctrl_block_device_reset(ctrl_info);
9099         pqi_ctrl_block_requests(ctrl_info);
9100         pqi_ctrl_wait_until_quiesced(ctrl_info);
9101
9102         if (system_state == SYSTEM_RESTART)
9103                 shutdown_event = RESTART;
9104         else
9105                 shutdown_event = SHUTDOWN;
9106
9107         /*
9108          * Write all data in the controller's battery-backed cache to
9109          * storage.
9110          */
9111         rc = pqi_flush_cache(ctrl_info, shutdown_event);
9112         if (rc)
9113                 dev_err(&pci_dev->dev,
9114                         "unable to flush controller cache\n");
9115
9116         pqi_crash_if_pending_command(ctrl_info);
9117         pqi_reset(ctrl_info);
9118 }
9119
9120 static void pqi_process_lockup_action_param(void)
9121 {
9122         unsigned int i;
9123
9124         if (!pqi_lockup_action_param)
9125                 return;
9126
9127         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
9128                 if (strcmp(pqi_lockup_action_param,
9129                         pqi_lockup_actions[i].name) == 0) {
9130                         pqi_lockup_action = pqi_lockup_actions[i].action;
9131                         return;
9132                 }
9133         }
9134
9135         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
9136                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
9137 }
9138
9139 #define PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS           30
9140 #define PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS           (30 * 60)
9141
9142 static void pqi_process_ctrl_ready_timeout_param(void)
9143 {
9144         if (pqi_ctrl_ready_timeout_secs == 0)
9145                 return;
9146
9147         if (pqi_ctrl_ready_timeout_secs < PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS) {
9148                 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",
9149                         DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS);
9150                 pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS;
9151         } else if (pqi_ctrl_ready_timeout_secs > PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS) {
9152                 pr_warn("%s: ctrl_ready_timeout parm of %u seconds is greater than maximum timeout of %d seconds - setting timeout to %d seconds\n",
9153                         DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS);
9154                 pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS;
9155         }
9156
9157         sis_ctrl_ready_timeout_secs = pqi_ctrl_ready_timeout_secs;
9158 }
9159
9160 static void pqi_process_module_params(void)
9161 {
9162         pqi_process_lockup_action_param();
9163         pqi_process_ctrl_ready_timeout_param();
9164 }
9165
9166 #if defined(CONFIG_PM)
9167
9168 static inline enum bmic_flush_cache_shutdown_event pqi_get_flush_cache_shutdown_event(struct pci_dev *pci_dev)
9169 {
9170         if (pci_dev->subsystem_vendor == PCI_VENDOR_ID_ADAPTEC2 && pci_dev->subsystem_device == 0x1304)
9171                 return RESTART;
9172
9173         return SUSPEND;
9174 }
9175
9176 static int pqi_suspend_or_freeze(struct device *dev, bool suspend)
9177 {
9178         struct pci_dev *pci_dev;
9179         struct pqi_ctrl_info *ctrl_info;
9180
9181         pci_dev = to_pci_dev(dev);
9182         ctrl_info = pci_get_drvdata(pci_dev);
9183
9184         pqi_wait_until_ofa_finished(ctrl_info);
9185
9186         pqi_ctrl_block_scan(ctrl_info);
9187         pqi_scsi_block_requests(ctrl_info);
9188         pqi_ctrl_block_device_reset(ctrl_info);
9189         pqi_ctrl_block_requests(ctrl_info);
9190         pqi_ctrl_wait_until_quiesced(ctrl_info);
9191
9192         if (suspend) {
9193                 enum bmic_flush_cache_shutdown_event shutdown_event;
9194
9195                 shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9196                 pqi_flush_cache(ctrl_info, shutdown_event);
9197         }
9198
9199         pqi_stop_heartbeat_timer(ctrl_info);
9200         pqi_crash_if_pending_command(ctrl_info);
9201         pqi_free_irqs(ctrl_info);
9202
9203         ctrl_info->controller_online = false;
9204         ctrl_info->pqi_mode_enabled = false;
9205
9206         return 0;
9207 }
9208
9209 static __maybe_unused int pqi_suspend(struct device *dev)
9210 {
9211         return pqi_suspend_or_freeze(dev, true);
9212 }
9213
9214 static int pqi_resume_or_restore(struct device *dev)
9215 {
9216         int rc;
9217         struct pci_dev *pci_dev;
9218         struct pqi_ctrl_info *ctrl_info;
9219
9220         pci_dev = to_pci_dev(dev);
9221         ctrl_info = pci_get_drvdata(pci_dev);
9222
9223         rc = pqi_request_irqs(ctrl_info);
9224         if (rc)
9225                 return rc;
9226
9227         pqi_ctrl_unblock_device_reset(ctrl_info);
9228         pqi_ctrl_unblock_requests(ctrl_info);
9229         pqi_scsi_unblock_requests(ctrl_info);
9230         pqi_ctrl_unblock_scan(ctrl_info);
9231
9232         ssleep(PQI_POST_RESET_DELAY_SECS);
9233
9234         return pqi_ctrl_init_resume(ctrl_info);
9235 }
9236
9237 static int pqi_freeze(struct device *dev)
9238 {
9239         return pqi_suspend_or_freeze(dev, false);
9240 }
9241
9242 static int pqi_thaw(struct device *dev)
9243 {
9244         int rc;
9245         struct pci_dev *pci_dev;
9246         struct pqi_ctrl_info *ctrl_info;
9247
9248         pci_dev = to_pci_dev(dev);
9249         ctrl_info = pci_get_drvdata(pci_dev);
9250
9251         rc = pqi_request_irqs(ctrl_info);
9252         if (rc)
9253                 return rc;
9254
9255         ctrl_info->controller_online = true;
9256         ctrl_info->pqi_mode_enabled = true;
9257
9258         pqi_ctrl_unblock_device_reset(ctrl_info);
9259         pqi_ctrl_unblock_requests(ctrl_info);
9260         pqi_scsi_unblock_requests(ctrl_info);
9261         pqi_ctrl_unblock_scan(ctrl_info);
9262
9263         return 0;
9264 }
9265
9266 static int pqi_poweroff(struct device *dev)
9267 {
9268         struct pci_dev *pci_dev;
9269         struct pqi_ctrl_info *ctrl_info;
9270         enum bmic_flush_cache_shutdown_event shutdown_event;
9271
9272         pci_dev = to_pci_dev(dev);
9273         ctrl_info = pci_get_drvdata(pci_dev);
9274
9275         shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
9276         pqi_flush_cache(ctrl_info, shutdown_event);
9277
9278         return 0;
9279 }
9280
9281 static const struct dev_pm_ops pqi_pm_ops = {
9282         .suspend = pqi_suspend,
9283         .resume = pqi_resume_or_restore,
9284         .freeze = pqi_freeze,
9285         .thaw = pqi_thaw,
9286         .poweroff = pqi_poweroff,
9287         .restore = pqi_resume_or_restore,
9288 };
9289
9290 #endif /* CONFIG_PM */
9291
9292 /* Define the PCI IDs for the controllers that we support. */
9293 static const struct pci_device_id pqi_pci_id_table[] = {
9294         {
9295                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9296                                0x105b, 0x1211)
9297         },
9298         {
9299                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9300                                0x105b, 0x1321)
9301         },
9302         {
9303                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9304                                0x152d, 0x8a22)
9305         },
9306         {
9307                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9308                                0x152d, 0x8a23)
9309         },
9310         {
9311                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9312                                0x152d, 0x8a24)
9313         },
9314         {
9315                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9316                                0x152d, 0x8a36)
9317         },
9318         {
9319                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9320                                0x152d, 0x8a37)
9321         },
9322         {
9323                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9324                                0x193d, 0x1104)
9325         },
9326         {
9327                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9328                                0x193d, 0x1105)
9329         },
9330         {
9331                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9332                                0x193d, 0x1106)
9333         },
9334         {
9335                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9336                                0x193d, 0x1107)
9337         },
9338         {
9339                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9340                                0x193d, 0x1108)
9341         },
9342         {
9343                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9344                                0x193d, 0x1109)
9345         },
9346         {
9347                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9348                                0x193d, 0x110b)
9349         },
9350         {
9351                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9352                                0x193d, 0x8460)
9353         },
9354         {
9355                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9356                                0x193d, 0x8461)
9357         },
9358         {
9359                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9360                                0x193d, 0xc460)
9361         },
9362         {
9363                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9364                                0x193d, 0xc461)
9365         },
9366         {
9367                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9368                                0x193d, 0xf460)
9369         },
9370         {
9371                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9372                                0x193d, 0xf461)
9373         },
9374         {
9375                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9376                                0x1bd4, 0x0045)
9377         },
9378         {
9379                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9380                                0x1bd4, 0x0046)
9381         },
9382         {
9383                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9384                                0x1bd4, 0x0047)
9385         },
9386         {
9387                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9388                                0x1bd4, 0x0048)
9389         },
9390         {
9391                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9392                                0x1bd4, 0x004a)
9393         },
9394         {
9395                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9396                                0x1bd4, 0x004b)
9397         },
9398         {
9399                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9400                                0x1bd4, 0x004c)
9401         },
9402         {
9403                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9404                                0x1bd4, 0x004f)
9405         },
9406         {
9407                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9408                                0x1bd4, 0x0051)
9409         },
9410         {
9411                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9412                                0x1bd4, 0x0052)
9413         },
9414         {
9415                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9416                                0x1bd4, 0x0053)
9417         },
9418         {
9419                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9420                                0x1bd4, 0x0054)
9421         },
9422         {
9423                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9424                                0x1bd4, 0x006b)
9425         },
9426         {
9427                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9428                                0x1bd4, 0x006c)
9429         },
9430         {
9431                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9432                                0x1bd4, 0x006d)
9433         },
9434         {
9435                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9436                                0x1bd4, 0x006f)
9437         },
9438         {
9439                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9440                                0x1bd4, 0x0070)
9441         },
9442         {
9443                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9444                                0x1bd4, 0x0071)
9445         },
9446         {
9447                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9448                                0x1bd4, 0x0072)
9449         },
9450         {
9451                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9452                                0x1bd4, 0x0086)
9453         },
9454         {
9455                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9456                                0x1bd4, 0x0087)
9457         },
9458         {
9459                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9460                                0x1bd4, 0x0088)
9461         },
9462         {
9463                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9464                                0x1bd4, 0x0089)
9465         },
9466         {
9467                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9468                                0x19e5, 0xd227)
9469         },
9470         {
9471                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9472                                0x19e5, 0xd228)
9473         },
9474         {
9475                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9476                                0x19e5, 0xd229)
9477         },
9478         {
9479                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9480                                0x19e5, 0xd22a)
9481         },
9482         {
9483                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9484                                0x19e5, 0xd22b)
9485         },
9486         {
9487                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9488                                0x19e5, 0xd22c)
9489         },
9490         {
9491                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9492                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
9493         },
9494         {
9495                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9496                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
9497         },
9498         {
9499                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9500                                PCI_VENDOR_ID_ADAPTEC2, 0x0659)
9501         },
9502         {
9503                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9504                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
9505         },
9506         {
9507                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9508                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
9509         },
9510         {
9511                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9512                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
9513         },
9514         {
9515                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9516                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
9517         },
9518         {
9519                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9520                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
9521         },
9522         {
9523                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9524                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
9525         },
9526         {
9527                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9528                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
9529         },
9530         {
9531                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9532                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
9533         },
9534         {
9535                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9536                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
9537         },
9538         {
9539                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9540                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
9541         },
9542         {
9543                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9544                                PCI_VENDOR_ID_ADAPTEC2, 0x080a)
9545         },
9546         {
9547                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9548                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
9549         },
9550         {
9551                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9552                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
9553         },
9554         {
9555                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9556                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
9557         },
9558         {
9559                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9560                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
9561         },
9562         {
9563                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9564                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
9565         },
9566         {
9567                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9568                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
9569         },
9570         {
9571                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9572                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
9573         },
9574         {
9575                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9576                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
9577         },
9578         {
9579                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9580                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
9581         },
9582         {
9583                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9584                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
9585         },
9586         {
9587                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9588                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
9589         },
9590         {
9591                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9592                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
9593         },
9594         {
9595                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9596                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
9597         },
9598         {
9599                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9600                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
9601         },
9602         {
9603                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9604                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
9605         },
9606         {
9607                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9608                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
9609         },
9610         {
9611                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9612                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
9613         },
9614         {
9615                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9616                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
9617         },
9618         {
9619                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9620                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
9621         },
9622         {
9623                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9624                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
9625         },
9626         {
9627                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9628                                PCI_VENDOR_ID_ADAPTEC2, 0x1304)
9629         },
9630         {
9631                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9632                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
9633         },
9634         {
9635                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9636                                PCI_VENDOR_ID_ADAPTEC2, 0x1400)
9637         },
9638         {
9639                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9640                                PCI_VENDOR_ID_ADAPTEC2, 0x1402)
9641         },
9642         {
9643                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9644                                PCI_VENDOR_ID_ADAPTEC2, 0x1410)
9645         },
9646         {
9647                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9648                                PCI_VENDOR_ID_ADAPTEC2, 0x1411)
9649         },
9650         {
9651                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9652                                PCI_VENDOR_ID_ADAPTEC2, 0x1412)
9653         },
9654         {
9655                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9656                                PCI_VENDOR_ID_ADAPTEC2, 0x1420)
9657         },
9658         {
9659                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9660                                PCI_VENDOR_ID_ADAPTEC2, 0x1430)
9661         },
9662         {
9663                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9664                                PCI_VENDOR_ID_ADAPTEC2, 0x1440)
9665         },
9666         {
9667                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9668                                PCI_VENDOR_ID_ADAPTEC2, 0x1441)
9669         },
9670         {
9671                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9672                                PCI_VENDOR_ID_ADAPTEC2, 0x1450)
9673         },
9674         {
9675                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9676                                PCI_VENDOR_ID_ADAPTEC2, 0x1452)
9677         },
9678         {
9679                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9680                                PCI_VENDOR_ID_ADAPTEC2, 0x1460)
9681         },
9682         {
9683                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9684                                PCI_VENDOR_ID_ADAPTEC2, 0x1461)
9685         },
9686         {
9687                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9688                                PCI_VENDOR_ID_ADAPTEC2, 0x1462)
9689         },
9690         {
9691                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9692                                PCI_VENDOR_ID_ADAPTEC2, 0x1463)
9693         },
9694         {
9695                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9696                                PCI_VENDOR_ID_ADAPTEC2, 0x1470)
9697         },
9698         {
9699                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9700                                PCI_VENDOR_ID_ADAPTEC2, 0x1471)
9701         },
9702         {
9703                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9704                                PCI_VENDOR_ID_ADAPTEC2, 0x1472)
9705         },
9706         {
9707                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9708                                PCI_VENDOR_ID_ADAPTEC2, 0x1473)
9709         },
9710         {
9711                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9712                                PCI_VENDOR_ID_ADAPTEC2, 0x1474)
9713         },
9714         {
9715                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9716                                PCI_VENDOR_ID_ADAPTEC2, 0x1475)
9717         },
9718         {
9719                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9720                                PCI_VENDOR_ID_ADAPTEC2, 0x1480)
9721         },
9722         {
9723                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9724                                PCI_VENDOR_ID_ADAPTEC2, 0x1490)
9725         },
9726         {
9727                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9728                                PCI_VENDOR_ID_ADAPTEC2, 0x1491)
9729         },
9730         {
9731                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9732                                PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
9733         },
9734         {
9735                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9736                                PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
9737         },
9738         {
9739                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9740                                PCI_VENDOR_ID_ADAPTEC2, 0x14a2)
9741         },
9742         {
9743                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9744                                PCI_VENDOR_ID_ADAPTEC2, 0x14a4)
9745         },
9746         {
9747                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9748                                PCI_VENDOR_ID_ADAPTEC2, 0x14a5)
9749         },
9750         {
9751                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9752                                PCI_VENDOR_ID_ADAPTEC2, 0x14a6)
9753         },
9754         {
9755                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9756                                PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
9757         },
9758         {
9759                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9760                                PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
9761         },
9762         {
9763                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9764                                PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
9765         },
9766         {
9767                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9768                                PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
9769         },
9770         {
9771                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9772                                PCI_VENDOR_ID_ADAPTEC2, 0x14c2)
9773         },
9774         {
9775                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9776                                PCI_VENDOR_ID_ADAPTEC2, 0x14c3)
9777         },
9778         {
9779                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9780                                PCI_VENDOR_ID_ADAPTEC2, 0x14c4)
9781         },
9782         {
9783                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9784                                PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
9785         },
9786         {
9787                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9788                                PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
9789         },
9790         {
9791                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9792                                PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
9793         },
9794         {
9795                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9796                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
9797         },
9798         {
9799                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9800                                PCI_VENDOR_ID_DELL, 0x1fe0)
9801         },
9802         {
9803                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9804                                PCI_VENDOR_ID_HP, 0x0600)
9805         },
9806         {
9807                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9808                                PCI_VENDOR_ID_HP, 0x0601)
9809         },
9810         {
9811                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9812                                PCI_VENDOR_ID_HP, 0x0602)
9813         },
9814         {
9815                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9816                                PCI_VENDOR_ID_HP, 0x0603)
9817         },
9818         {
9819                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9820                                PCI_VENDOR_ID_HP, 0x0609)
9821         },
9822         {
9823                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9824                                PCI_VENDOR_ID_HP, 0x0650)
9825         },
9826         {
9827                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9828                                PCI_VENDOR_ID_HP, 0x0651)
9829         },
9830         {
9831                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9832                                PCI_VENDOR_ID_HP, 0x0652)
9833         },
9834         {
9835                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9836                                PCI_VENDOR_ID_HP, 0x0653)
9837         },
9838         {
9839                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9840                                PCI_VENDOR_ID_HP, 0x0654)
9841         },
9842         {
9843                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9844                                PCI_VENDOR_ID_HP, 0x0655)
9845         },
9846         {
9847                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9848                                PCI_VENDOR_ID_HP, 0x0700)
9849         },
9850         {
9851                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9852                                PCI_VENDOR_ID_HP, 0x0701)
9853         },
9854         {
9855                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9856                                PCI_VENDOR_ID_HP, 0x1001)
9857         },
9858         {
9859                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9860                                PCI_VENDOR_ID_HP, 0x1002)
9861         },
9862         {
9863                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9864                                PCI_VENDOR_ID_HP, 0x1100)
9865         },
9866         {
9867                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9868                                PCI_VENDOR_ID_HP, 0x1101)
9869         },
9870         {
9871                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9872                                0x1590, 0x0294)
9873         },
9874         {
9875                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9876                                0x1590, 0x02db)
9877         },
9878         {
9879                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9880                                0x1590, 0x02dc)
9881         },
9882         {
9883                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9884                                0x1590, 0x032e)
9885         },
9886         {
9887                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9888                                0x1590, 0x036f)
9889         },
9890         {
9891                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9892                                0x1590, 0x0381)
9893         },
9894         {
9895                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9896                                0x1590, 0x0382)
9897         },
9898         {
9899                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9900                                0x1590, 0x0383)
9901         },
9902         {
9903                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9904                                0x1d8d, 0x0800)
9905         },
9906         {
9907                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9908                                0x1d8d, 0x0908)
9909         },
9910         {
9911                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9912                                0x1d8d, 0x0806)
9913         },
9914         {
9915                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9916                                0x1d8d, 0x0916)
9917         },
9918         {
9919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9920                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
9921         },
9922         {
9923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9924                                0x1dfc, 0x3161)
9925         },
9926         {
9927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9928                                0x1f0c, 0x3161)
9929         },
9930         {
9931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9932                                0x1cf2, 0x5445)
9933         },
9934         {
9935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9936                                0x1cf2, 0x5446)
9937         },
9938         {
9939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9940                                0x1cf2, 0x5447)
9941         },
9942         {
9943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9944                                0x1cf2, 0x5449)
9945         },
9946         {
9947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9948                                0x1cf2, 0x544a)
9949         },
9950         {
9951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9952                                0x1cf2, 0x544b)
9953         },
9954         {
9955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9956                                0x1cf2, 0x544d)
9957         },
9958         {
9959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9960                                0x1cf2, 0x544e)
9961         },
9962         {
9963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9964                                0x1cf2, 0x544f)
9965         },
9966         {
9967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9968                                0x1cf2, 0x0b27)
9969         },
9970         {
9971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9972                                0x1cf2, 0x0b29)
9973         },
9974         {
9975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9976                                0x1cf2, 0x0b45)
9977         },
9978         {
9979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9980                                0x1cc4, 0x0101)
9981         },
9982         {
9983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9984                                0x1cc4, 0x0201)
9985         },
9986         {
9987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9988                                PCI_VENDOR_ID_LENOVO, 0x0220)
9989         },
9990         {
9991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9992                                PCI_VENDOR_ID_LENOVO, 0x0221)
9993         },
9994         {
9995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9996                                PCI_VENDOR_ID_LENOVO, 0x0520)
9997         },
9998         {
9999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10000                                PCI_VENDOR_ID_LENOVO, 0x0522)
10001         },
10002         {
10003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10004                                PCI_VENDOR_ID_LENOVO, 0x0620)
10005         },
10006         {
10007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10008                                PCI_VENDOR_ID_LENOVO, 0x0621)
10009         },
10010         {
10011                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10012                                PCI_VENDOR_ID_LENOVO, 0x0622)
10013         },
10014         {
10015                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10016                                PCI_VENDOR_ID_LENOVO, 0x0623)
10017         },
10018         {
10019                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10020                                 0x1e93, 0x1000)
10021         },
10022         {
10023                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10024                                 0x1e93, 0x1001)
10025         },
10026         {
10027                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10028                                 0x1e93, 0x1002)
10029         },
10030         {
10031                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
10032                                PCI_ANY_ID, PCI_ANY_ID)
10033         },
10034         { 0 }
10035 };
10036
10037 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
10038
10039 static struct pci_driver pqi_pci_driver = {
10040         .name = DRIVER_NAME_SHORT,
10041         .id_table = pqi_pci_id_table,
10042         .probe = pqi_pci_probe,
10043         .remove = pqi_pci_remove,
10044         .shutdown = pqi_shutdown,
10045 #if defined(CONFIG_PM)
10046         .driver = {
10047                 .pm = &pqi_pm_ops
10048         },
10049 #endif
10050 };
10051
10052 static int __init pqi_init(void)
10053 {
10054         int rc;
10055
10056         pr_info(DRIVER_NAME "\n");
10057         pqi_verify_structures();
10058         sis_verify_structures();
10059
10060         pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
10061         if (!pqi_sas_transport_template)
10062                 return -ENODEV;
10063
10064         pqi_process_module_params();
10065
10066         rc = pci_register_driver(&pqi_pci_driver);
10067         if (rc)
10068                 sas_release_transport(pqi_sas_transport_template);
10069
10070         return rc;
10071 }
10072
10073 static void __exit pqi_cleanup(void)
10074 {
10075         pci_unregister_driver(&pqi_pci_driver);
10076         sas_release_transport(pqi_sas_transport_template);
10077 }
10078
10079 module_init(pqi_init);
10080 module_exit(pqi_cleanup);
10081
10082 static void pqi_verify_structures(void)
10083 {
10084         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10085                 sis_host_to_ctrl_doorbell) != 0x20);
10086         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10087                 sis_interrupt_mask) != 0x34);
10088         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10089                 sis_ctrl_to_host_doorbell) != 0x9c);
10090         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10091                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
10092         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10093                 sis_driver_scratch) != 0xb0);
10094         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10095                 sis_product_identifier) != 0xb4);
10096         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10097                 sis_firmware_status) != 0xbc);
10098         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10099                 sis_ctrl_shutdown_reason_code) != 0xcc);
10100         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10101                 sis_mailbox) != 0x1000);
10102         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
10103                 pqi_registers) != 0x4000);
10104
10105         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10106                 iu_type) != 0x0);
10107         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10108                 iu_length) != 0x2);
10109         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10110                 response_queue_id) != 0x4);
10111         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
10112                 driver_flags) != 0x6);
10113         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
10114
10115         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10116                 status) != 0x0);
10117         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10118                 service_response) != 0x1);
10119         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10120                 data_present) != 0x2);
10121         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10122                 reserved) != 0x3);
10123         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10124                 residual_count) != 0x4);
10125         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10126                 data_length) != 0x8);
10127         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10128                 reserved1) != 0xa);
10129         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
10130                 data) != 0xc);
10131         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
10132
10133         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10134                 data_in_result) != 0x0);
10135         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10136                 data_out_result) != 0x1);
10137         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10138                 reserved) != 0x2);
10139         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10140                 status) != 0x5);
10141         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10142                 status_qualifier) != 0x6);
10143         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10144                 sense_data_length) != 0x8);
10145         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10146                 response_data_length) != 0xa);
10147         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10148                 data_in_transferred) != 0xc);
10149         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10150                 data_out_transferred) != 0x10);
10151         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
10152                 data) != 0x14);
10153         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
10154
10155         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10156                 signature) != 0x0);
10157         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10158                 function_and_status_code) != 0x8);
10159         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10160                 max_admin_iq_elements) != 0x10);
10161         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10162                 max_admin_oq_elements) != 0x11);
10163         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10164                 admin_iq_element_length) != 0x12);
10165         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10166                 admin_oq_element_length) != 0x13);
10167         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10168                 max_reset_timeout) != 0x14);
10169         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10170                 legacy_intx_status) != 0x18);
10171         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10172                 legacy_intx_mask_set) != 0x1c);
10173         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10174                 legacy_intx_mask_clear) != 0x20);
10175         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10176                 device_status) != 0x40);
10177         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10178                 admin_iq_pi_offset) != 0x48);
10179         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10180                 admin_oq_ci_offset) != 0x50);
10181         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10182                 admin_iq_element_array_addr) != 0x58);
10183         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10184                 admin_oq_element_array_addr) != 0x60);
10185         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10186                 admin_iq_ci_addr) != 0x68);
10187         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10188                 admin_oq_pi_addr) != 0x70);
10189         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10190                 admin_iq_num_elements) != 0x78);
10191         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10192                 admin_oq_num_elements) != 0x79);
10193         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10194                 admin_queue_int_msg_num) != 0x7a);
10195         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10196                 device_error) != 0x80);
10197         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10198                 error_details) != 0x88);
10199         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10200                 device_reset) != 0x90);
10201         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
10202                 power_action) != 0x94);
10203         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
10204
10205         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10206                 header.iu_type) != 0);
10207         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10208                 header.iu_length) != 2);
10209         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10210                 header.driver_flags) != 6);
10211         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10212                 request_id) != 8);
10213         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10214                 function_code) != 10);
10215         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10216                 data.report_device_capability.buffer_length) != 44);
10217         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10218                 data.report_device_capability.sg_descriptor) != 48);
10219         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10220                 data.create_operational_iq.queue_id) != 12);
10221         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10222                 data.create_operational_iq.element_array_addr) != 16);
10223         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10224                 data.create_operational_iq.ci_addr) != 24);
10225         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10226                 data.create_operational_iq.num_elements) != 32);
10227         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10228                 data.create_operational_iq.element_length) != 34);
10229         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10230                 data.create_operational_iq.queue_protocol) != 36);
10231         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10232                 data.create_operational_oq.queue_id) != 12);
10233         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10234                 data.create_operational_oq.element_array_addr) != 16);
10235         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10236                 data.create_operational_oq.pi_addr) != 24);
10237         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10238                 data.create_operational_oq.num_elements) != 32);
10239         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10240                 data.create_operational_oq.element_length) != 34);
10241         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10242                 data.create_operational_oq.queue_protocol) != 36);
10243         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10244                 data.create_operational_oq.int_msg_num) != 40);
10245         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10246                 data.create_operational_oq.coalescing_count) != 42);
10247         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10248                 data.create_operational_oq.min_coalescing_time) != 44);
10249         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10250                 data.create_operational_oq.max_coalescing_time) != 48);
10251         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
10252                 data.delete_operational_queue.queue_id) != 12);
10253         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
10254         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10255                 data.create_operational_iq) != 64 - 11);
10256         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10257                 data.create_operational_oq) != 64 - 11);
10258         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
10259                 data.delete_operational_queue) != 64 - 11);
10260
10261         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10262                 header.iu_type) != 0);
10263         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10264                 header.iu_length) != 2);
10265         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10266                 header.driver_flags) != 6);
10267         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10268                 request_id) != 8);
10269         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10270                 function_code) != 10);
10271         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10272                 status) != 11);
10273         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10274                 data.create_operational_iq.status_descriptor) != 12);
10275         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10276                 data.create_operational_iq.iq_pi_offset) != 16);
10277         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10278                 data.create_operational_oq.status_descriptor) != 12);
10279         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
10280                 data.create_operational_oq.oq_ci_offset) != 16);
10281         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
10282
10283         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10284                 header.iu_type) != 0);
10285         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10286                 header.iu_length) != 2);
10287         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10288                 header.response_queue_id) != 4);
10289         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10290                 header.driver_flags) != 6);
10291         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10292                 request_id) != 8);
10293         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10294                 nexus_id) != 10);
10295         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10296                 buffer_length) != 12);
10297         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10298                 lun_number) != 16);
10299         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10300                 protocol_specific) != 24);
10301         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10302                 error_index) != 27);
10303         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10304                 cdb) != 32);
10305         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10306                 timeout) != 60);
10307         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
10308                 sg_descriptors) != 64);
10309         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
10310                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10311
10312         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10313                 header.iu_type) != 0);
10314         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10315                 header.iu_length) != 2);
10316         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10317                 header.response_queue_id) != 4);
10318         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10319                 header.driver_flags) != 6);
10320         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10321                 request_id) != 8);
10322         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10323                 nexus_id) != 12);
10324         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10325                 buffer_length) != 16);
10326         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10327                 data_encryption_key_index) != 22);
10328         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10329                 encrypt_tweak_lower) != 24);
10330         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10331                 encrypt_tweak_upper) != 28);
10332         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10333                 cdb) != 32);
10334         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10335                 error_index) != 48);
10336         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10337                 num_sg_descriptors) != 50);
10338         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10339                 cdb_length) != 51);
10340         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10341                 lun_number) != 52);
10342         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
10343                 sg_descriptors) != 64);
10344         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
10345                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
10346
10347         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10348                 header.iu_type) != 0);
10349         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10350                 header.iu_length) != 2);
10351         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10352                 request_id) != 8);
10353         BUILD_BUG_ON(offsetof(struct pqi_io_response,
10354                 error_index) != 10);
10355
10356         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10357                 header.iu_type) != 0);
10358         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10359                 header.iu_length) != 2);
10360         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10361                 header.response_queue_id) != 4);
10362         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10363                 request_id) != 8);
10364         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10365                 data.report_event_configuration.buffer_length) != 12);
10366         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10367                 data.report_event_configuration.sg_descriptors) != 16);
10368         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10369                 data.set_event_configuration.global_event_oq_id) != 10);
10370         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10371                 data.set_event_configuration.buffer_length) != 12);
10372         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
10373                 data.set_event_configuration.sg_descriptors) != 16);
10374
10375         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10376                 max_inbound_iu_length) != 6);
10377         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
10378                 max_outbound_iu_length) != 14);
10379         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
10380
10381         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10382                 data_length) != 0);
10383         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10384                 iq_arbitration_priority_support_bitmask) != 8);
10385         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10386                 maximum_aw_a) != 9);
10387         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10388                 maximum_aw_b) != 10);
10389         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10390                 maximum_aw_c) != 11);
10391         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10392                 max_inbound_queues) != 16);
10393         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10394                 max_elements_per_iq) != 18);
10395         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10396                 max_iq_element_length) != 24);
10397         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10398                 min_iq_element_length) != 26);
10399         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10400                 max_outbound_queues) != 30);
10401         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10402                 max_elements_per_oq) != 32);
10403         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10404                 intr_coalescing_time_granularity) != 34);
10405         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10406                 max_oq_element_length) != 36);
10407         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10408                 min_oq_element_length) != 38);
10409         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
10410                 iu_layer_descriptors) != 64);
10411         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
10412
10413         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10414                 event_type) != 0);
10415         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
10416                 oq_id) != 2);
10417         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
10418
10419         BUILD_BUG_ON(offsetof(struct pqi_event_config,
10420                 num_event_descriptors) != 2);
10421         BUILD_BUG_ON(offsetof(struct pqi_event_config,
10422                 descriptors) != 4);
10423
10424         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
10425                 ARRAY_SIZE(pqi_supported_event_types));
10426
10427         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10428                 header.iu_type) != 0);
10429         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10430                 header.iu_length) != 2);
10431         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10432                 event_type) != 8);
10433         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10434                 event_id) != 10);
10435         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10436                 additional_event_id) != 12);
10437         BUILD_BUG_ON(offsetof(struct pqi_event_response,
10438                 data) != 16);
10439         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
10440
10441         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10442                 header.iu_type) != 0);
10443         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10444                 header.iu_length) != 2);
10445         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10446                 event_type) != 8);
10447         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10448                 event_id) != 10);
10449         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
10450                 additional_event_id) != 12);
10451         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
10452
10453         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10454                 header.iu_type) != 0);
10455         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10456                 header.iu_length) != 2);
10457         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10458                 request_id) != 8);
10459         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10460                 nexus_id) != 10);
10461         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10462                 timeout) != 14);
10463         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10464                 lun_number) != 16);
10465         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10466                 protocol_specific) != 24);
10467         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10468                 outbound_queue_id_to_manage) != 26);
10469         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10470                 request_id_to_manage) != 28);
10471         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
10472                 task_management_function) != 30);
10473         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
10474
10475         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10476                 header.iu_type) != 0);
10477         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10478                 header.iu_length) != 2);
10479         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10480                 request_id) != 8);
10481         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10482                 nexus_id) != 10);
10483         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10484                 additional_response_info) != 12);
10485         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
10486                 response_code) != 15);
10487         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
10488
10489         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10490                 configured_logical_drive_count) != 0);
10491         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10492                 configuration_signature) != 1);
10493         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10494                 firmware_version_short) != 5);
10495         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10496                 extended_logical_unit_count) != 154);
10497         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10498                 firmware_build_number) != 190);
10499         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10500                 vendor_id) != 200);
10501         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10502                 product_id) != 208);
10503         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10504                 extra_controller_flags) != 286);
10505         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10506                 controller_mode) != 292);
10507         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10508                 spare_part_number) != 293);
10509         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
10510                 firmware_version_long) != 325);
10511
10512         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10513                 phys_bay_in_box) != 115);
10514         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10515                 device_type) != 120);
10516         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10517                 redundant_path_present_map) != 1736);
10518         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10519                 active_path_number) != 1738);
10520         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10521                 alternate_paths_phys_connector) != 1739);
10522         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10523                 alternate_paths_phys_box_on_port) != 1755);
10524         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
10525                 current_queue_depth_limit) != 1796);
10526         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
10527
10528         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
10529         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10530                 page_code) != 0);
10531         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10532                 subpage_code) != 1);
10533         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
10534                 buffer_length) != 2);
10535
10536         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
10537         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10538                 page_code) != 0);
10539         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10540                 subpage_code) != 1);
10541         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
10542                 page_length) != 2);
10543
10544         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
10545                 != 18);
10546         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10547                 header) != 0);
10548         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10549                 firmware_read_support) != 4);
10550         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10551                 driver_read_support) != 5);
10552         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10553                 firmware_write_support) != 6);
10554         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10555                 driver_write_support) != 7);
10556         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10557                 max_transfer_encrypted_sas_sata) != 8);
10558         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10559                 max_transfer_encrypted_nvme) != 10);
10560         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10561                 max_write_raid_5_6) != 12);
10562         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10563                 max_write_raid_1_10_2drive) != 14);
10564         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
10565                 max_write_raid_1_10_3drive) != 16);
10566
10567         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
10568         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
10569         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
10570                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10571         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
10572                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10573         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
10574         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
10575                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10576         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
10577         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
10578                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10579
10580         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
10581         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
10582                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
10583 }