drivers/scsi/smartpqi/smartpqi_init.c

   1 /*
   2  *    driver for Microsemi PQI-based storage controllers
   3  *    Copyright (c) 2016-2017 Microsemi Corporation
   4  *    Copyright (c) 2016 PMC-Sierra, Inc.
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; version 2 of the License.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    Questions/Comments/Bugfixes to [email protected]
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/rtc.h>
  26 #include <linux/bcd.h>
  27 #include <linux/reboot.h>
  28 #include <linux/cciss_ioctl.h>
  29 #include <linux/blk-mq-pci.h>
  30 #include <scsi/scsi_host.h>
  31 #include <scsi/scsi_cmnd.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_transport_sas.h>
  35 #include <asm/unaligned.h>
  36 #include "smartpqi.h"
  37 #include "smartpqi_sis.h"
  38
  39 #if !defined(BUILD_TIMESTAMP)
  40 #define BUILD_TIMESTAMP
  41 #endif
  42
  43 #define DRIVER_VERSION          "1.1.2-126"
  44 #define DRIVER_MAJOR            1
  45 #define DRIVER_MINOR            1
  46 #define DRIVER_RELEASE          2
  47 #define DRIVER_REVISION         126
  48
  49 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  50                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  51 #define DRIVER_NAME_SHORT       "smartpqi"
  52
  53 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  54
  55 MODULE_AUTHOR("Microsemi");
  56 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  57         DRIVER_VERSION);
  58 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  59 MODULE_VERSION(DRIVER_VERSION);
  60 MODULE_LICENSE("GPL");
  61
  62 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63 static void pqi_ctrl_offline_worker(struct work_struct *work);
  64 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  65 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  66 static void pqi_scan_start(struct Scsi_Host *shost);
  67 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  68         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  69         struct pqi_io_request *io_request);
  70 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  71         struct pqi_iu_header *request, unsigned int flags,
  72         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  73 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  74         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  75         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  76         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  77
  78 /* for flags argument to pqi_submit_raid_request_synchronous() */
  79 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  80
  81 static struct scsi_transport_template *pqi_sas_transport_template;
  82
  83 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  84
  85 enum pqi_lockup_action {
  86         NONE,
  87         REBOOT,
  88         PANIC
  89 };
  90
  91 static enum pqi_lockup_action pqi_lockup_action = NONE;
  92
  93 static struct {
  94         enum pqi_lockup_action  action;
  95         char                    *name;
  96 } pqi_lockup_actions[] = {
  97         {
  98                 .action = NONE,
  99                 .name = "none",
 100         },
 101         {
 102                 .action = REBOOT,
 103                 .name = "reboot",
 104         },
 105         {
 106                 .action = PANIC,
 107                 .name = "panic",
 108         },
 109 };
 110
 111 static unsigned int pqi_supported_event_types[] = {
 112         PQI_EVENT_TYPE_HOTPLUG,
 113         PQI_EVENT_TYPE_HARDWARE,
 114         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 115         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 116         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 117         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 118 };
 119
 120 static int pqi_disable_device_id_wildcards;
 121 module_param_named(disable_device_id_wildcards,
 122         pqi_disable_device_id_wildcards, int, 0644);
 123 MODULE_PARM_DESC(disable_device_id_wildcards,
 124         "Disable device ID wildcards.");
 125
 126 static int pqi_disable_heartbeat;
 127 module_param_named(disable_heartbeat,
 128         pqi_disable_heartbeat, int, 0644);
 129 MODULE_PARM_DESC(disable_heartbeat,
 130         "Disable heartbeat.");
 131
 132 static int pqi_disable_ctrl_shutdown;
 133 module_param_named(disable_ctrl_shutdown,
 134         pqi_disable_ctrl_shutdown, int, 0644);
 135 MODULE_PARM_DESC(disable_ctrl_shutdown,
 136         "Disable controller shutdown when controller locked up.");
 137
 138 static char *pqi_lockup_action_param;
 139 module_param_named(lockup_action,
 140         pqi_lockup_action_param, charp, 0644);
 141 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 142         "\t\tSupported: none, reboot, panic\n"
 143         "\t\tDefault: none");
 144
 145 static char *raid_levels[] = {
 146         "RAID-0",
 147         "RAID-4",
 148         "RAID-1(1+0)",
 149         "RAID-5",
 150         "RAID-5+1",
 151         "RAID-ADG",
 152         "RAID-1(ADM)",
 153 };
 154
 155 static char *pqi_raid_level_to_string(u8 raid_level)
 156 {
 157         if (raid_level < ARRAY_SIZE(raid_levels))
 158                 return raid_levels[raid_level];
 159
 160         return "RAID UNKNOWN";
 161 }
 162
 163 #define SA_RAID_0               0
 164 #define SA_RAID_4               1
 165 #define SA_RAID_1               2       /* also used for RAID 10 */
 166 #define SA_RAID_5               3       /* also used for RAID 50 */
 167 #define SA_RAID_51              4
 168 #define SA_RAID_6               5       /* also used for RAID 60 */
 169 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 170 #define SA_RAID_MAX             SA_RAID_ADM
 171 #define SA_RAID_UNKNOWN         0xff
 172
 173 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 174 {
 175         pqi_prep_for_scsi_done(scmd);
 176         scmd->scsi_done(scmd);
 177 }
 178
 179 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 180 {
 181         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 182 }
 183
 184 static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
 185 {
 186         void *hostdata = shost_priv(shost);
 187
 188         return *((struct pqi_ctrl_info **)hostdata);
 189 }
 190
 191 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 192 {
 193         return !device->is_physical_device;
 194 }
 195
 196 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 197 {
 198         return scsi3addr[2] != 0;
 199 }
 200
 201 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 202 {
 203         return !ctrl_info->controller_online;
 204 }
 205
 206 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 207 {
 208         if (ctrl_info->controller_online)
 209                 if (!sis_is_firmware_running(ctrl_info))
 210                         pqi_take_ctrl_offline(ctrl_info);
 211 }
 212
 213 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 214 {
 215         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 216 }
 217
 218 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 219         struct pqi_ctrl_info *ctrl_info)
 220 {
 221         return sis_read_driver_scratch(ctrl_info);
 222 }
 223
 224 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 225         enum pqi_ctrl_mode mode)
 226 {
 227         sis_write_driver_scratch(ctrl_info, mode);
 228 }
 229
 230 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 231 {
 232         ctrl_info->block_requests = true;
 233         scsi_block_requests(ctrl_info->scsi_host);
 234 }
 235
 236 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 237 {
 238         ctrl_info->block_requests = false;
 239         wake_up_all(&ctrl_info->block_requests_wait);
 240         pqi_retry_raid_bypass_requests(ctrl_info);
 241         scsi_unblock_requests(ctrl_info->scsi_host);
 242 }
 243
 244 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         return ctrl_info->block_requests;
 247 }
 248
 249 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 250         unsigned long timeout_msecs)
 251 {
 252         unsigned long remaining_msecs;
 253
 254         if (!pqi_ctrl_blocked(ctrl_info))
 255                 return timeout_msecs;
 256
 257         atomic_inc(&ctrl_info->num_blocked_threads);
 258
 259         if (timeout_msecs == NO_TIMEOUT) {
 260                 wait_event(ctrl_info->block_requests_wait,
 261                         !pqi_ctrl_blocked(ctrl_info));
 262                 remaining_msecs = timeout_msecs;
 263         } else {
 264                 unsigned long remaining_jiffies;
 265
 266                 remaining_jiffies =
 267                         wait_event_timeout(ctrl_info->block_requests_wait,
 268                                 !pqi_ctrl_blocked(ctrl_info),
 269                                 msecs_to_jiffies(timeout_msecs));
 270                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 271         }
 272
 273         atomic_dec(&ctrl_info->num_blocked_threads);
 274
 275         return remaining_msecs;
 276 }
 277
 278 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 279 {
 280         atomic_inc(&ctrl_info->num_busy_threads);
 281 }
 282
 283 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 284 {
 285         atomic_dec(&ctrl_info->num_busy_threads);
 286 }
 287
 288 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 289 {
 290         while (atomic_read(&ctrl_info->num_busy_threads) >
 291                 atomic_read(&ctrl_info->num_blocked_threads))
 292                 usleep_range(1000, 2000);
 293 }
 294
 295 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 296 {
 297         return device->device_offline;
 298 }
 299
 300 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 301 {
 302         device->in_reset = true;
 303 }
 304
 305 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 306 {
 307         device->in_reset = false;
 308 }
 309
 310 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 311 {
 312         return device->in_reset;
 313 }
 314
 315 static inline void pqi_schedule_rescan_worker_with_delay(
 316         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 317 {
 318         if (pqi_ctrl_offline(ctrl_info))
 319                 return;
 320
 321         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 322 }
 323
 324 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 325 {
 326         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 327 }
 328
 329 #define PQI_RESCAN_WORK_DELAY  (10 * HZ)
 330
 331 static inline void pqi_schedule_rescan_worker_delayed(
 332         struct pqi_ctrl_info *ctrl_info)
 333 {
 334         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 335 }
 336
 337 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 338 {
 339         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 340 }
 341
 342 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 343 {
 344         if (!ctrl_info->heartbeat_counter)
 345                 return 0;
 346
 347         return readl(ctrl_info->heartbeat_counter);
 348 }
 349
 350 static int pqi_map_single(struct pci_dev *pci_dev,
 351         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 352         size_t buffer_length, int data_direction)
 353 {
 354         dma_addr_t bus_address;
 355
 356         if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
 357                 return 0;
 358
 359         bus_address = pci_map_single(pci_dev, buffer, buffer_length,
 360                 data_direction);
 361         if (pci_dma_mapping_error(pci_dev, bus_address))
 362                 return -ENOMEM;
 363
 364         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 365         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 366         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 367
 368         return 0;
 369 }
 370
 371 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 372         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 373         int data_direction)
 374 {
 375         int i;
 376
 377         if (data_direction == PCI_DMA_NONE)
 378                 return;
 379
 380         for (i = 0; i < num_descriptors; i++)
 381                 pci_unmap_single(pci_dev,
 382                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 383                         get_unaligned_le32(&descriptors[i].length),
 384                         data_direction);
 385 }
 386
 387 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 388         struct pqi_raid_path_request *request, u8 cmd,
 389         u8 *scsi3addr, void *buffer, size_t buffer_length,
 390         u16 vpd_page, int *pci_direction)
 391 {
 392         u8 *cdb;
 393         int pci_dir;
 394
 395         memset(request, 0, sizeof(*request));
 396
 397         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 398         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 399                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 400                 &request->header.iu_length);
 401         put_unaligned_le32(buffer_length, &request->buffer_length);
 402         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 403         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 404         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 405
 406         cdb = request->cdb;
 407
 408         switch (cmd) {
 409         case INQUIRY:
 410                 request->data_direction = SOP_READ_FLAG;
 411                 cdb[0] = INQUIRY;
 412                 if (vpd_page & VPD_PAGE) {
 413                         cdb[1] = 0x1;
 414                         cdb[2] = (u8)vpd_page;
 415                 }
 416                 cdb[4] = (u8)buffer_length;
 417                 break;
 418         case CISS_REPORT_LOG:
 419         case CISS_REPORT_PHYS:
 420                 request->data_direction = SOP_READ_FLAG;
 421                 cdb[0] = cmd;
 422                 if (cmd == CISS_REPORT_PHYS)
 423                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 424                 else
 425                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 426                 put_unaligned_be32(buffer_length, &cdb[6]);
 427                 break;
 428         case CISS_GET_RAID_MAP:
 429                 request->data_direction = SOP_READ_FLAG;
 430                 cdb[0] = CISS_READ;
 431                 cdb[1] = CISS_GET_RAID_MAP;
 432                 put_unaligned_be32(buffer_length, &cdb[6]);
 433                 break;
 434         case SA_FLUSH_CACHE:
 435                 request->data_direction = SOP_WRITE_FLAG;
 436                 cdb[0] = BMIC_WRITE;
 437                 cdb[6] = BMIC_FLUSH_CACHE;
 438                 put_unaligned_be16(buffer_length, &cdb[7]);
 439                 break;
 440         case BMIC_IDENTIFY_CONTROLLER:
 441         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 442                 request->data_direction = SOP_READ_FLAG;
 443                 cdb[0] = BMIC_READ;
 444                 cdb[6] = cmd;
 445                 put_unaligned_be16(buffer_length, &cdb[7]);
 446                 break;
 447         case BMIC_WRITE_HOST_WELLNESS:
 448                 request->data_direction = SOP_WRITE_FLAG;
 449                 cdb[0] = BMIC_WRITE;
 450                 cdb[6] = cmd;
 451                 put_unaligned_be16(buffer_length, &cdb[7]);
 452                 break;
 453         default:
 454                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 455                         cmd);
 456                 break;
 457         }
 458
 459         switch (request->data_direction) {
 460         case SOP_READ_FLAG:
 461                 pci_dir = PCI_DMA_FROMDEVICE;
 462                 break;
 463         case SOP_WRITE_FLAG:
 464                 pci_dir = PCI_DMA_TODEVICE;
 465                 break;
 466         case SOP_NO_DIRECTION_FLAG:
 467                 pci_dir = PCI_DMA_NONE;
 468                 break;
 469         default:
 470                 pci_dir = PCI_DMA_BIDIRECTIONAL;
 471                 break;
 472         }
 473
 474         *pci_direction = pci_dir;
 475
 476         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 477                 buffer, buffer_length, pci_dir);
 478 }
 479
 480 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 481 {
 482         io_request->scmd = NULL;
 483         io_request->status = 0;
 484         io_request->error_info = NULL;
 485         io_request->raid_bypass = false;
 486 }
 487
 488 static struct pqi_io_request *pqi_alloc_io_request(
 489         struct pqi_ctrl_info *ctrl_info)
 490 {
 491         struct pqi_io_request *io_request;
 492         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 493
 494         while (1) {
 495                 io_request = &ctrl_info->io_request_pool[i];
 496                 if (atomic_inc_return(&io_request->refcount) == 1)
 497                         break;
 498                 atomic_dec(&io_request->refcount);
 499                 i = (i + 1) % ctrl_info->max_io_slots;
 500         }
 501
 502         /* benignly racy */
 503         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 504
 505         pqi_reinit_io_request(io_request);
 506
 507         return io_request;
 508 }
 509
 510 static void pqi_free_io_request(struct pqi_io_request *io_request)
 511 {
 512         atomic_dec(&io_request->refcount);
 513 }
 514
 515 static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 516         struct bmic_identify_controller *buffer)
 517 {
 518         int rc;
 519         int pci_direction;
 520         struct pqi_raid_path_request request;
 521
 522         rc = pqi_build_raid_path_request(ctrl_info, &request,
 523                 BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
 524                 sizeof(*buffer), 0, &pci_direction);
 525         if (rc)
 526                 return rc;
 527
 528         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 529                 NULL, NO_TIMEOUT);
 530
 531         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 532                 pci_direction);
 533
 534         return rc;
 535 }
 536
 537 static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 538         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 539 {
 540         int rc;
 541         int pci_direction;
 542         struct pqi_raid_path_request request;
 543
 544         rc = pqi_build_raid_path_request(ctrl_info, &request,
 545                 INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
 546                 &pci_direction);
 547         if (rc)
 548                 return rc;
 549
 550         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 551                 NULL, NO_TIMEOUT);
 552
 553         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 554                 pci_direction);
 555
 556         return rc;
 557 }
 558
 559 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 560         struct pqi_scsi_dev *device,
 561         struct bmic_identify_physical_device *buffer,
 562         size_t buffer_length)
 563 {
 564         int rc;
 565         int pci_direction;
 566         u16 bmic_device_index;
 567         struct pqi_raid_path_request request;
 568
 569         rc = pqi_build_raid_path_request(ctrl_info, &request,
 570                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 571                 buffer_length, 0, &pci_direction);
 572         if (rc)
 573                 return rc;
 574
 575         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 576         request.cdb[2] = (u8)bmic_device_index;
 577         request.cdb[9] = (u8)(bmic_device_index >> 8);
 578
 579         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 580                 0, NULL, NO_TIMEOUT);
 581
 582         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 583                 pci_direction);
 584
 585         return rc;
 586 }
 587
 588 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 589         enum bmic_flush_cache_shutdown_event shutdown_event)
 590 {
 591         int rc;
 592         struct pqi_raid_path_request request;
 593         int pci_direction;
 594         struct bmic_flush_cache *flush_cache;
 595
 596         /*
 597          * Don't bother trying to flush the cache if the controller is
 598          * locked up.
 599          */
 600         if (pqi_ctrl_offline(ctrl_info))
 601                 return -ENXIO;
 602
 603         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 604         if (!flush_cache)
 605                 return -ENOMEM;
 606
 607         flush_cache->shutdown_event = shutdown_event;
 608
 609         rc = pqi_build_raid_path_request(ctrl_info, &request,
 610                 SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
 611                 sizeof(*flush_cache), 0, &pci_direction);
 612         if (rc)
 613                 goto out;
 614
 615         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 616                 0, NULL, NO_TIMEOUT);
 617
 618         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 619                 pci_direction);
 620
 621 out:
 622         kfree(flush_cache);
 623
 624         return rc;
 625 }
 626
 627 static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 628         void *buffer, size_t buffer_length)
 629 {
 630         int rc;
 631         struct pqi_raid_path_request request;
 632         int pci_direction;
 633
 634         rc = pqi_build_raid_path_request(ctrl_info, &request,
 635                 BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 636                 buffer_length, 0, &pci_direction);
 637         if (rc)
 638                 return rc;
 639
 640         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 641                 0, NULL, NO_TIMEOUT);
 642
 643         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 644                 pci_direction);
 645
 646         return rc;
 647 }
 648
 649 #pragma pack(1)
 650
 651 struct bmic_host_wellness_driver_version {
 652         u8      start_tag[4];
 653         u8      driver_version_tag[2];
 654         __le16  driver_version_length;
 655         char    driver_version[32];
 656         u8      end_tag[2];
 657 };
 658
 659 #pragma pack()
 660
 661 static int pqi_write_driver_version_to_host_wellness(
 662         struct pqi_ctrl_info *ctrl_info)
 663 {
 664         int rc;
 665         struct bmic_host_wellness_driver_version *buffer;
 666         size_t buffer_length;
 667
 668         buffer_length = sizeof(*buffer);
 669
 670         buffer = kmalloc(buffer_length, GFP_KERNEL);
 671         if (!buffer)
 672                 return -ENOMEM;
 673
 674         buffer->start_tag[0] = '<';
 675         buffer->start_tag[1] = 'H';
 676         buffer->start_tag[2] = 'W';
 677         buffer->start_tag[3] = '>';
 678         buffer->driver_version_tag[0] = 'D';
 679         buffer->driver_version_tag[1] = 'V';
 680         put_unaligned_le16(sizeof(buffer->driver_version),
 681                 &buffer->driver_version_length);
 682         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 683                 sizeof(buffer->driver_version) - 1);
 684         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 685         buffer->end_tag[0] = 'Z';
 686         buffer->end_tag[1] = 'Z';
 687
 688         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 689
 690         kfree(buffer);
 691
 692         return rc;
 693 }
 694
 695 #pragma pack(1)
 696
 697 struct bmic_host_wellness_time {
 698         u8      start_tag[4];
 699         u8      time_tag[2];
 700         __le16  time_length;
 701         u8      time[8];
 702         u8      dont_write_tag[2];
 703         u8      end_tag[2];
 704 };
 705
 706 #pragma pack()
 707
 708 static int pqi_write_current_time_to_host_wellness(
 709         struct pqi_ctrl_info *ctrl_info)
 710 {
 711         int rc;
 712         struct bmic_host_wellness_time *buffer;
 713         size_t buffer_length;
 714         time64_t local_time;
 715         unsigned int year;
 716         struct tm tm;
 717
 718         buffer_length = sizeof(*buffer);
 719
 720         buffer = kmalloc(buffer_length, GFP_KERNEL);
 721         if (!buffer)
 722                 return -ENOMEM;
 723
 724         buffer->start_tag[0] = '<';
 725         buffer->start_tag[1] = 'H';
 726         buffer->start_tag[2] = 'W';
 727         buffer->start_tag[3] = '>';
 728         buffer->time_tag[0] = 'T';
 729         buffer->time_tag[1] = 'D';
 730         put_unaligned_le16(sizeof(buffer->time),
 731                 &buffer->time_length);
 732
 733         local_time = ktime_get_real_seconds();
 734         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 735         year = tm.tm_year + 1900;
 736
 737         buffer->time[0] = bin2bcd(tm.tm_hour);
 738         buffer->time[1] = bin2bcd(tm.tm_min);
 739         buffer->time[2] = bin2bcd(tm.tm_sec);
 740         buffer->time[3] = 0;
 741         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 742         buffer->time[5] = bin2bcd(tm.tm_mday);
 743         buffer->time[6] = bin2bcd(year / 100);
 744         buffer->time[7] = bin2bcd(year % 100);
 745
 746         buffer->dont_write_tag[0] = 'D';
 747         buffer->dont_write_tag[1] = 'W';
 748         buffer->end_tag[0] = 'Z';
 749         buffer->end_tag[1] = 'Z';
 750
 751         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 752
 753         kfree(buffer);
 754
 755         return rc;
 756 }
 757
 758 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
 759
 760 static void pqi_update_time_worker(struct work_struct *work)
 761 {
 762         int rc;
 763         struct pqi_ctrl_info *ctrl_info;
 764
 765         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 766                 update_time_work);
 767
 768         if (pqi_ctrl_offline(ctrl_info))
 769                 return;
 770
 771         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 772         if (rc)
 773                 dev_warn(&ctrl_info->pci_dev->dev,
 774                         "error updating time on controller\n");
 775
 776         schedule_delayed_work(&ctrl_info->update_time_work,
 777                 PQI_UPDATE_TIME_WORK_INTERVAL);
 778 }
 779
 780 static inline void pqi_schedule_update_time_worker(
 781         struct pqi_ctrl_info *ctrl_info)
 782 {
 783         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 784 }
 785
 786 static inline void pqi_cancel_update_time_worker(
 787         struct pqi_ctrl_info *ctrl_info)
 788 {
 789         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 790 }
 791
 792 static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 793         void *buffer, size_t buffer_length)
 794 {
 795         int rc;
 796         int pci_direction;
 797         struct pqi_raid_path_request request;
 798
 799         rc = pqi_build_raid_path_request(ctrl_info, &request,
 800                 cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 801         if (rc)
 802                 return rc;
 803
 804         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 805                 NULL, NO_TIMEOUT);
 806
 807         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 808                 pci_direction);
 809
 810         return rc;
 811 }
 812
 813 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 814         void **buffer)
 815 {
 816         int rc;
 817         size_t lun_list_length;
 818         size_t lun_data_length;
 819         size_t new_lun_list_length;
 820         void *lun_data = NULL;
 821         struct report_lun_header *report_lun_header;
 822
 823         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 824         if (!report_lun_header) {
 825                 rc = -ENOMEM;
 826                 goto out;
 827         }
 828
 829         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 830                 sizeof(*report_lun_header));
 831         if (rc)
 832                 goto out;
 833
 834         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 835
 836 again:
 837         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 838
 839         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 840         if (!lun_data) {
 841                 rc = -ENOMEM;
 842                 goto out;
 843         }
 844
 845         if (lun_list_length == 0) {
 846                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 847                 goto out;
 848         }
 849
 850         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 851         if (rc)
 852                 goto out;
 853
 854         new_lun_list_length = get_unaligned_be32(
 855                 &((struct report_lun_header *)lun_data)->list_length);
 856
 857         if (new_lun_list_length > lun_list_length) {
 858                 lun_list_length = new_lun_list_length;
 859                 kfree(lun_data);
 860                 goto again;
 861         }
 862
 863 out:
 864         kfree(report_lun_header);
 865
 866         if (rc) {
 867                 kfree(lun_data);
 868                 lun_data = NULL;
 869         }
 870
 871         *buffer = lun_data;
 872
 873         return rc;
 874 }
 875
 876 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 877         void **buffer)
 878 {
 879         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 880                 buffer);
 881 }
 882
 883 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 884         void **buffer)
 885 {
 886         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 887 }
 888
 889 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 890         struct report_phys_lun_extended **physdev_list,
 891         struct report_log_lun_extended **logdev_list)
 892 {
 893         int rc;
 894         size_t logdev_list_length;
 895         size_t logdev_data_length;
 896         struct report_log_lun_extended *internal_logdev_list;
 897         struct report_log_lun_extended *logdev_data;
 898         struct report_lun_header report_lun_header;
 899
 900         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 901         if (rc)
 902                 dev_err(&ctrl_info->pci_dev->dev,
 903                         "report physical LUNs failed\n");
 904
 905         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 906         if (rc)
 907                 dev_err(&ctrl_info->pci_dev->dev,
 908                         "report logical LUNs failed\n");
 909
 910         /*
 911          * Tack the controller itself onto the end of the logical device list.
 912          */
 913
 914         logdev_data = *logdev_list;
 915
 916         if (logdev_data) {
 917                 logdev_list_length =
 918                         get_unaligned_be32(&logdev_data->header.list_length);
 919         } else {
 920                 memset(&report_lun_header, 0, sizeof(report_lun_header));
 921                 logdev_data =
 922                         (struct report_log_lun_extended *)&report_lun_header;
 923                 logdev_list_length = 0;
 924         }
 925
 926         logdev_data_length = sizeof(struct report_lun_header) +
 927                 logdev_list_length;
 928
 929         internal_logdev_list = kmalloc(logdev_data_length +
 930                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
 931         if (!internal_logdev_list) {
 932                 kfree(*logdev_list);
 933                 *logdev_list = NULL;
 934                 return -ENOMEM;
 935         }
 936
 937         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 938         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 939                 sizeof(struct report_log_lun_extended_entry));
 940         put_unaligned_be32(logdev_list_length +
 941                 sizeof(struct report_log_lun_extended_entry),
 942                 &internal_logdev_list->header.list_length);
 943
 944         kfree(*logdev_list);
 945         *logdev_list = internal_logdev_list;
 946
 947         return 0;
 948 }
 949
 950 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 951         int bus, int target, int lun)
 952 {
 953         device->bus = bus;
 954         device->target = target;
 955         device->lun = lun;
 956 }
 957
 958 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 959 {
 960         u8 *scsi3addr;
 961         u32 lunid;
 962         int bus;
 963         int target;
 964         int lun;
 965
 966         scsi3addr = device->scsi3addr;
 967         lunid = get_unaligned_le32(scsi3addr);
 968
 969         if (pqi_is_hba_lunid(scsi3addr)) {
 970                 /* The specified device is the controller. */
 971                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 972                 device->target_lun_valid = true;
 973                 return;
 974         }
 975
 976         if (pqi_is_logical_device(device)) {
 977                 if (device->is_external_raid_device) {
 978                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
 979                         target = (lunid >> 16) & 0x3fff;
 980                         lun = lunid & 0xff;
 981                 } else {
 982                         bus = PQI_RAID_VOLUME_BUS;
 983                         target = 0;
 984                         lun = lunid & 0x3fff;
 985                 }
 986                 pqi_set_bus_target_lun(device, bus, target, lun);
 987                 device->target_lun_valid = true;
 988                 return;
 989         }
 990
 991         /*
 992          * Defer target and LUN assignment for non-controller physical devices
 993          * because the SAS transport layer will make these assignments later.
 994          */
 995         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 996 }
 997
 998 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
 999         struct pqi_scsi_dev *device)
1000 {
1001         int rc;
1002         u8 raid_level;
1003         u8 *buffer;
1004
1005         raid_level = SA_RAID_UNKNOWN;
1006
1007         buffer = kmalloc(64, GFP_KERNEL);
1008         if (buffer) {
1009                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1010                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1011                 if (rc == 0) {
1012                         raid_level = buffer[8];
1013                         if (raid_level > SA_RAID_MAX)
1014                                 raid_level = SA_RAID_UNKNOWN;
1015                 }
1016                 kfree(buffer);
1017         }
1018
1019         device->raid_level = raid_level;
1020 }
1021
1022 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1023         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1024 {
1025         char *err_msg;
1026         u32 raid_map_size;
1027         u32 r5or6_blocks_per_row;
1028         unsigned int num_phys_disks;
1029         unsigned int num_raid_map_entries;
1030
1031         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1032
1033         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1034                 err_msg = "RAID map too small";
1035                 goto bad_raid_map;
1036         }
1037
1038         if (raid_map_size > sizeof(*raid_map)) {
1039                 err_msg = "RAID map too large";
1040                 goto bad_raid_map;
1041         }
1042
1043         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1044                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
1045                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
1046         num_raid_map_entries = num_phys_disks *
1047                 get_unaligned_le16(&raid_map->row_cnt);
1048
1049         if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
1050                 err_msg = "invalid number of map entries in RAID map";
1051                 goto bad_raid_map;
1052         }
1053
1054         if (device->raid_level == SA_RAID_1) {
1055                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1056                         err_msg = "invalid RAID-1 map";
1057                         goto bad_raid_map;
1058                 }
1059         } else if (device->raid_level == SA_RAID_ADM) {
1060                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1061                         err_msg = "invalid RAID-1(ADM) map";
1062                         goto bad_raid_map;
1063                 }
1064         } else if ((device->raid_level == SA_RAID_5 ||
1065                 device->raid_level == SA_RAID_6) &&
1066                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1067                 /* RAID 50/60 */
1068                 r5or6_blocks_per_row =
1069                         get_unaligned_le16(&raid_map->strip_size) *
1070                         get_unaligned_le16(&raid_map->data_disks_per_row);
1071                 if (r5or6_blocks_per_row == 0) {
1072                         err_msg = "invalid RAID-5 or RAID-6 map";
1073                         goto bad_raid_map;
1074                 }
1075         }
1076
1077         return 0;
1078
1079 bad_raid_map:
1080         dev_warn(&ctrl_info->pci_dev->dev,
1081                 "logical device %08x%08x %s\n",
1082                 *((u32 *)&device->scsi3addr),
1083                 *((u32 *)&device->scsi3addr[4]), err_msg);
1084
1085         return -EINVAL;
1086 }
1087
1088 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1089         struct pqi_scsi_dev *device)
1090 {
1091         int rc;
1092         int pci_direction;
1093         struct pqi_raid_path_request request;
1094         struct raid_map *raid_map;
1095
1096         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1097         if (!raid_map)
1098                 return -ENOMEM;
1099
1100         rc = pqi_build_raid_path_request(ctrl_info, &request,
1101                 CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
1102                 sizeof(*raid_map), 0, &pci_direction);
1103         if (rc)
1104                 goto error;
1105
1106         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
1107                 NULL, NO_TIMEOUT);
1108
1109         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
1110                 pci_direction);
1111
1112         if (rc)
1113                 goto error;
1114
1115         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1116         if (rc)
1117                 goto error;
1118
1119         device->raid_map = raid_map;
1120
1121         return 0;
1122
1123 error:
1124         kfree(raid_map);
1125
1126         return rc;
1127 }
1128
1129 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1130         struct pqi_scsi_dev *device)
1131 {
1132         int rc;
1133         u8 *buffer;
1134         u8 bypass_status;
1135
1136         buffer = kmalloc(64, GFP_KERNEL);
1137         if (!buffer)
1138                 return;
1139
1140         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1141                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1142         if (rc)
1143                 goto out;
1144
1145 #define RAID_BYPASS_STATUS      4
1146 #define RAID_BYPASS_CONFIGURED  0x1
1147 #define RAID_BYPASS_ENABLED     0x2
1148
1149         bypass_status = buffer[RAID_BYPASS_STATUS];
1150         device->raid_bypass_configured =
1151                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1152         if (device->raid_bypass_configured &&
1153                 (bypass_status & RAID_BYPASS_ENABLED) &&
1154                 pqi_get_raid_map(ctrl_info, device) == 0)
1155                 device->raid_bypass_enabled = true;
1156
1157 out:
1158         kfree(buffer);
1159 }
1160
1161 /*
1162  * Use vendor-specific VPD to determine online/offline status of a volume.
1163  */
1164
1165 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1166         struct pqi_scsi_dev *device)
1167 {
1168         int rc;
1169         size_t page_length;
1170         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1171         bool volume_offline = true;
1172         u32 volume_flags;
1173         struct ciss_vpd_logical_volume_status *vpd;
1174
1175         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1176         if (!vpd)
1177                 goto no_buffer;
1178
1179         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1180                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1181         if (rc)
1182                 goto out;
1183
1184         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1185                 volume_status) + vpd->page_length;
1186         if (page_length < sizeof(*vpd))
1187                 goto out;
1188
1189         volume_status = vpd->volume_status;
1190         volume_flags = get_unaligned_be32(&vpd->flags);
1191         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1192
1193 out:
1194         kfree(vpd);
1195 no_buffer:
1196         device->volume_status = volume_status;
1197         device->volume_offline = volume_offline;
1198 }
1199
1200 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1201         struct pqi_scsi_dev *device)
1202 {
1203         int rc;
1204         u8 *buffer;
1205
1206         buffer = kmalloc(64, GFP_KERNEL);
1207         if (!buffer)
1208                 return -ENOMEM;
1209
1210         /* Send an inquiry to the device to see what it is. */
1211         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1212         if (rc)
1213                 goto out;
1214
1215         scsi_sanitize_inquiry_string(&buffer[8], 8);
1216         scsi_sanitize_inquiry_string(&buffer[16], 16);
1217
1218         device->devtype = buffer[0] & 0x1f;
1219         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1220         memcpy(device->model, &buffer[16], sizeof(device->model));
1221
1222         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1223                 if (device->is_external_raid_device) {
1224                         device->raid_level = SA_RAID_UNKNOWN;
1225                         device->volume_status = CISS_LV_OK;
1226                         device->volume_offline = false;
1227                 } else {
1228                         pqi_get_raid_level(ctrl_info, device);
1229                         pqi_get_raid_bypass_status(ctrl_info, device);
1230                         pqi_get_volume_status(ctrl_info, device);
1231                 }
1232         }
1233
1234 out:
1235         kfree(buffer);
1236
1237         return rc;
1238 }
1239
1240 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1241         struct pqi_scsi_dev *device,
1242         struct bmic_identify_physical_device *id_phys)
1243 {
1244         int rc;
1245
1246         memset(id_phys, 0, sizeof(*id_phys));
1247
1248         rc = pqi_identify_physical_device(ctrl_info, device,
1249                 id_phys, sizeof(*id_phys));
1250         if (rc) {
1251                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1252                 return;
1253         }
1254
1255         device->queue_depth =
1256                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1257         device->device_type = id_phys->device_type;
1258         device->active_path_index = id_phys->active_path_number;
1259         device->path_map = id_phys->redundant_path_present_map;
1260         memcpy(&device->box,
1261                 &id_phys->alternate_paths_phys_box_on_port,
1262                 sizeof(device->box));
1263         memcpy(&device->phys_connector,
1264                 &id_phys->alternate_paths_phys_connector,
1265                 sizeof(device->phys_connector));
1266         device->bay = id_phys->phys_bay_in_box;
1267 }
1268
1269 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1270         struct pqi_scsi_dev *device)
1271 {
1272         char *status;
1273         static const char unknown_state_str[] =
1274                 "Volume is in an unknown state (%u)";
1275         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1276
1277         switch (device->volume_status) {
1278         case CISS_LV_OK:
1279                 status = "Volume online";
1280                 break;
1281         case CISS_LV_FAILED:
1282                 status = "Volume failed";
1283                 break;
1284         case CISS_LV_NOT_CONFIGURED:
1285                 status = "Volume not configured";
1286                 break;
1287         case CISS_LV_DEGRADED:
1288                 status = "Volume degraded";
1289                 break;
1290         case CISS_LV_READY_FOR_RECOVERY:
1291                 status = "Volume ready for recovery operation";
1292                 break;
1293         case CISS_LV_UNDERGOING_RECOVERY:
1294                 status = "Volume undergoing recovery";
1295                 break;
1296         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1297                 status = "Wrong physical drive was replaced";
1298                 break;
1299         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1300                 status = "A physical drive not properly connected";
1301                 break;
1302         case CISS_LV_HARDWARE_OVERHEATING:
1303                 status = "Hardware is overheating";
1304                 break;
1305         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1306                 status = "Hardware has overheated";
1307                 break;
1308         case CISS_LV_UNDERGOING_EXPANSION:
1309                 status = "Volume undergoing expansion";
1310                 break;
1311         case CISS_LV_NOT_AVAILABLE:
1312                 status = "Volume waiting for transforming volume";
1313                 break;
1314         case CISS_LV_QUEUED_FOR_EXPANSION:
1315                 status = "Volume queued for expansion";
1316                 break;
1317         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1318                 status = "Volume disabled due to SCSI ID conflict";
1319                 break;
1320         case CISS_LV_EJECTED:
1321                 status = "Volume has been ejected";
1322                 break;
1323         case CISS_LV_UNDERGOING_ERASE:
1324                 status = "Volume undergoing background erase";
1325                 break;
1326         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1327                 status = "Volume ready for predictive spare rebuild";
1328                 break;
1329         case CISS_LV_UNDERGOING_RPI:
1330                 status = "Volume undergoing rapid parity initialization";
1331                 break;
1332         case CISS_LV_PENDING_RPI:
1333                 status = "Volume queued for rapid parity initialization";
1334                 break;
1335         case CISS_LV_ENCRYPTED_NO_KEY:
1336                 status = "Encrypted volume inaccessible - key not present";
1337                 break;
1338         case CISS_LV_UNDERGOING_ENCRYPTION:
1339                 status = "Volume undergoing encryption process";
1340                 break;
1341         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1342                 status = "Volume undergoing encryption re-keying process";
1343                 break;
1344         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1345                 status = "Volume encrypted but encryption is disabled";
1346                 break;
1347         case CISS_LV_PENDING_ENCRYPTION:
1348                 status = "Volume pending migration to encrypted state";
1349                 break;
1350         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1351                 status = "Volume pending encryption rekeying";
1352                 break;
1353         case CISS_LV_NOT_SUPPORTED:
1354                 status = "Volume not supported on this controller";
1355                 break;
1356         case CISS_LV_STATUS_UNAVAILABLE:
1357                 status = "Volume status not available";
1358                 break;
1359         default:
1360                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1361                         unknown_state_str, device->volume_status);
1362                 status = unknown_state_buffer;
1363                 break;
1364         }
1365
1366         dev_info(&ctrl_info->pci_dev->dev,
1367                 "scsi %d:%d:%d:%d %s\n",
1368                 ctrl_info->scsi_host->host_no,
1369                 device->bus, device->target, device->lun, status);
1370 }
1371
1372 static void pqi_rescan_worker(struct work_struct *work)
1373 {
1374         struct pqi_ctrl_info *ctrl_info;
1375
1376         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1377                 rescan_work);
1378
1379         pqi_scan_scsi_devices(ctrl_info);
1380 }
1381
1382 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1383         struct pqi_scsi_dev *device)
1384 {
1385         int rc;
1386
1387         if (pqi_is_logical_device(device))
1388                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1389                         device->target, device->lun);
1390         else
1391                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1392
1393         return rc;
1394 }
1395
1396 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1397         struct pqi_scsi_dev *device)
1398 {
1399         if (pqi_is_logical_device(device))
1400                 scsi_remove_device(device->sdev);
1401         else
1402                 pqi_remove_sas_device(device);
1403 }
1404
1405 /* Assumes the SCSI device list lock is held. */
1406
1407 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1408         int bus, int target, int lun)
1409 {
1410         struct pqi_scsi_dev *device;
1411
1412         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1413                 scsi_device_list_entry)
1414                 if (device->bus == bus && device->target == target &&
1415                         device->lun == lun)
1416                         return device;
1417
1418         return NULL;
1419 }
1420
1421 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1422         struct pqi_scsi_dev *dev2)
1423 {
1424         if (dev1->is_physical_device != dev2->is_physical_device)
1425                 return false;
1426
1427         if (dev1->is_physical_device)
1428                 return dev1->wwid == dev2->wwid;
1429
1430         return memcmp(dev1->volume_id, dev2->volume_id,
1431                 sizeof(dev1->volume_id)) == 0;
1432 }
1433
1434 enum pqi_find_result {
1435         DEVICE_NOT_FOUND,
1436         DEVICE_CHANGED,
1437         DEVICE_SAME,
1438 };
1439
1440 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1441         struct pqi_scsi_dev *device_to_find,
1442         struct pqi_scsi_dev **matching_device)
1443 {
1444         struct pqi_scsi_dev *device;
1445
1446         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1447                 scsi_device_list_entry) {
1448                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1449                         device->scsi3addr)) {
1450                         *matching_device = device;
1451                         if (pqi_device_equal(device_to_find, device)) {
1452                                 if (device_to_find->volume_offline)
1453                                         return DEVICE_CHANGED;
1454                                 return DEVICE_SAME;
1455                         }
1456                         return DEVICE_CHANGED;
1457                 }
1458         }
1459
1460         return DEVICE_NOT_FOUND;
1461 }
1462
1463 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1464
1465 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1466         char *action, struct pqi_scsi_dev *device)
1467 {
1468         ssize_t count;
1469         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1470
1471         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1472                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1473
1474         if (device->target_lun_valid)
1475                 count += snprintf(buffer + count,
1476                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1477                         "%d:%d",
1478                         device->target,
1479                         device->lun);
1480         else
1481                 count += snprintf(buffer + count,
1482                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1483                         "-:-");
1484
1485         if (pqi_is_logical_device(device))
1486                 count += snprintf(buffer + count,
1487                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1488                         " %08x%08x",
1489                         *((u32 *)&device->scsi3addr),
1490                         *((u32 *)&device->scsi3addr[4]));
1491         else
1492                 count += snprintf(buffer + count,
1493                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1494                         " %016llx", device->sas_address);
1495
1496         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1497                 " %s %.8s %.16s ",
1498                 scsi_device_type(device->devtype),
1499                 device->vendor,
1500                 device->model);
1501
1502         if (pqi_is_logical_device(device)) {
1503                 if (device->devtype == TYPE_DISK)
1504                         count += snprintf(buffer + count,
1505                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1506                                 "SSDSmartPathCap%c En%c %-12s",
1507                                 device->raid_bypass_configured ? '+' : '-',
1508                                 device->raid_bypass_enabled ? '+' : '-',
1509                                 pqi_raid_level_to_string(device->raid_level));
1510         } else {
1511                 count += snprintf(buffer + count,
1512                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1513                         "AIO%c", device->aio_enabled ? '+' : '-');
1514                 if (device->devtype == TYPE_DISK ||
1515                         device->devtype == TYPE_ZBC)
1516                         count += snprintf(buffer + count,
1517                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1518                                 " qd=%-6d", device->queue_depth);
1519         }
1520
1521         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1522 }
1523
1524 /* Assumes the SCSI device list lock is held. */
1525
1526 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1527         struct pqi_scsi_dev *new_device)
1528 {
1529         existing_device->devtype = new_device->devtype;
1530         existing_device->device_type = new_device->device_type;
1531         existing_device->bus = new_device->bus;
1532         if (new_device->target_lun_valid) {
1533                 existing_device->target = new_device->target;
1534                 existing_device->lun = new_device->lun;
1535                 existing_device->target_lun_valid = true;
1536         }
1537
1538         /* By definition, the scsi3addr and wwid fields are already the same. */
1539
1540         existing_device->is_physical_device = new_device->is_physical_device;
1541         existing_device->is_external_raid_device =
1542                 new_device->is_external_raid_device;
1543         existing_device->aio_enabled = new_device->aio_enabled;
1544         memcpy(existing_device->vendor, new_device->vendor,
1545                 sizeof(existing_device->vendor));
1546         memcpy(existing_device->model, new_device->model,
1547                 sizeof(existing_device->model));
1548         existing_device->sas_address = new_device->sas_address;
1549         existing_device->raid_level = new_device->raid_level;
1550         existing_device->queue_depth = new_device->queue_depth;
1551         existing_device->aio_handle = new_device->aio_handle;
1552         existing_device->volume_status = new_device->volume_status;
1553         existing_device->active_path_index = new_device->active_path_index;
1554         existing_device->path_map = new_device->path_map;
1555         existing_device->bay = new_device->bay;
1556         memcpy(existing_device->box, new_device->box,
1557                 sizeof(existing_device->box));
1558         memcpy(existing_device->phys_connector, new_device->phys_connector,
1559                 sizeof(existing_device->phys_connector));
1560         existing_device->offload_to_mirror = 0;
1561         kfree(existing_device->raid_map);
1562         existing_device->raid_map = new_device->raid_map;
1563         existing_device->raid_bypass_configured =
1564                 new_device->raid_bypass_configured;
1565         existing_device->raid_bypass_enabled =
1566                 new_device->raid_bypass_enabled;
1567
1568         /* To prevent this from being freed later. */
1569         new_device->raid_map = NULL;
1570 }
1571
1572 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1573 {
1574         if (device) {
1575                 kfree(device->raid_map);
1576                 kfree(device);
1577         }
1578 }
1579
1580 /*
1581  * Called when exposing a new device to the OS fails in order to re-adjust
1582  * our internal SCSI device list to match the SCSI ML's view.
1583  */
1584
1585 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1586         struct pqi_scsi_dev *device)
1587 {
1588         unsigned long flags;
1589
1590         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1591         list_del(&device->scsi_device_list_entry);
1592         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1593
1594         /* Allow the device structure to be freed later. */
1595         device->keep_device = false;
1596 }
1597
1598 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1599         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1600 {
1601         int rc;
1602         unsigned int i;
1603         unsigned long flags;
1604         enum pqi_find_result find_result;
1605         struct pqi_scsi_dev *device;
1606         struct pqi_scsi_dev *next;
1607         struct pqi_scsi_dev *matching_device;
1608         LIST_HEAD(add_list);
1609         LIST_HEAD(delete_list);
1610
1611         /*
1612          * The idea here is to do as little work as possible while holding the
1613          * spinlock.  That's why we go to great pains to defer anything other
1614          * than updating the internal device list until after we release the
1615          * spinlock.
1616          */
1617
1618         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1619
1620         /* Assume that all devices in the existing list have gone away. */
1621         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1622                 scsi_device_list_entry)
1623                 device->device_gone = true;
1624
1625         for (i = 0; i < num_new_devices; i++) {
1626                 device = new_device_list[i];
1627
1628                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1629                                                 &matching_device);
1630
1631                 switch (find_result) {
1632                 case DEVICE_SAME:
1633                         /*
1634                          * The newly found device is already in the existing
1635                          * device list.
1636                          */
1637                         device->new_device = false;
1638                         matching_device->device_gone = false;
1639                         pqi_scsi_update_device(matching_device, device);
1640                         break;
1641                 case DEVICE_NOT_FOUND:
1642                         /*
1643                          * The newly found device is NOT in the existing device
1644                          * list.
1645                          */
1646                         device->new_device = true;
1647                         break;
1648                 case DEVICE_CHANGED:
1649                         /*
1650                          * The original device has gone away and we need to add
1651                          * the new device.
1652                          */
1653                         device->new_device = true;
1654                         break;
1655                 }
1656         }
1657
1658         /* Process all devices that have gone away. */
1659         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1660                 scsi_device_list_entry) {
1661                 if (device->device_gone) {
1662                         list_del(&device->scsi_device_list_entry);
1663                         list_add_tail(&device->delete_list_entry, &delete_list);
1664                 }
1665         }
1666
1667         /* Process all new devices. */
1668         for (i = 0; i < num_new_devices; i++) {
1669                 device = new_device_list[i];
1670                 if (!device->new_device)
1671                         continue;
1672                 if (device->volume_offline)
1673                         continue;
1674                 list_add_tail(&device->scsi_device_list_entry,
1675                         &ctrl_info->scsi_device_list);
1676                 list_add_tail(&device->add_list_entry, &add_list);
1677                 /* To prevent this device structure from being freed later. */
1678                 device->keep_device = true;
1679         }
1680
1681         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1682
1683         /* Remove all devices that have gone away. */
1684         list_for_each_entry_safe(device, next, &delete_list,
1685                 delete_list_entry) {
1686                 if (device->volume_offline) {
1687                         pqi_dev_info(ctrl_info, "offline", device);
1688                         pqi_show_volume_status(ctrl_info, device);
1689                 } else {
1690                         pqi_dev_info(ctrl_info, "removed", device);
1691                 }
1692                 if (device->sdev)
1693                         pqi_remove_device(ctrl_info, device);
1694                 list_del(&device->delete_list_entry);
1695                 pqi_free_device(device);
1696         }
1697
1698         /*
1699          * Notify the SCSI ML if the queue depth of any existing device has
1700          * changed.
1701          */
1702         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1703                 scsi_device_list_entry) {
1704                 if (device->sdev && device->queue_depth !=
1705                         device->advertised_queue_depth) {
1706                         device->advertised_queue_depth = device->queue_depth;
1707                         scsi_change_queue_depth(device->sdev,
1708                                 device->advertised_queue_depth);
1709                 }
1710         }
1711
1712         /* Expose any new devices. */
1713         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1714                 if (!device->sdev) {
1715                         pqi_dev_info(ctrl_info, "added", device);
1716                         rc = pqi_add_device(ctrl_info, device);
1717                         if (rc) {
1718                                 dev_warn(&ctrl_info->pci_dev->dev,
1719                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1720                                         ctrl_info->scsi_host->host_no,
1721                                         device->bus, device->target,
1722                                         device->lun);
1723                                 pqi_fixup_botched_add(ctrl_info, device);
1724                         }
1725                 }
1726         }
1727 }
1728
1729 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1730 {
1731         bool is_supported = false;
1732
1733         switch (device->devtype) {
1734         case TYPE_DISK:
1735         case TYPE_ZBC:
1736         case TYPE_TAPE:
1737         case TYPE_MEDIUM_CHANGER:
1738         case TYPE_ENCLOSURE:
1739                 is_supported = true;
1740                 break;
1741         case TYPE_RAID:
1742                 /*
1743                  * Only support the HBA controller itself as a RAID
1744                  * controller.  If it's a RAID controller other than
1745                  * the HBA itself (an external RAID controller, for
1746                  * example), we don't support it.
1747                  */
1748                 if (pqi_is_hba_lunid(device->scsi3addr))
1749                         is_supported = true;
1750                 break;
1751         }
1752
1753         return is_supported;
1754 }
1755
1756 static inline bool pqi_skip_device(u8 *scsi3addr)
1757 {
1758         /* Ignore all masked devices. */
1759         if (MASKED_DEVICE(scsi3addr))
1760                 return true;
1761
1762         return false;
1763 }
1764
1765 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1766 {
1767         int i;
1768         int rc;
1769         LIST_HEAD(new_device_list_head);
1770         struct report_phys_lun_extended *physdev_list = NULL;
1771         struct report_log_lun_extended *logdev_list = NULL;
1772         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1773         struct report_log_lun_extended_entry *log_lun_ext_entry;
1774         struct bmic_identify_physical_device *id_phys = NULL;
1775         u32 num_physicals;
1776         u32 num_logicals;
1777         struct pqi_scsi_dev **new_device_list = NULL;
1778         struct pqi_scsi_dev *device;
1779         struct pqi_scsi_dev *next;
1780         unsigned int num_new_devices;
1781         unsigned int num_valid_devices;
1782         bool is_physical_device;
1783         u8 *scsi3addr;
1784         static char *out_of_memory_msg =
1785                 "failed to allocate memory, device discovery stopped";
1786
1787         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1788         if (rc)
1789                 goto out;
1790
1791         if (physdev_list)
1792                 num_physicals =
1793                         get_unaligned_be32(&physdev_list->header.list_length)
1794                                 / sizeof(physdev_list->lun_entries[0]);
1795         else
1796                 num_physicals = 0;
1797
1798         if (logdev_list)
1799                 num_logicals =
1800                         get_unaligned_be32(&logdev_list->header.list_length)
1801                                 / sizeof(logdev_list->lun_entries[0]);
1802         else
1803                 num_logicals = 0;
1804
1805         if (num_physicals) {
1806                 /*
1807                  * We need this buffer for calls to pqi_get_physical_disk_info()
1808                  * below.  We allocate it here instead of inside
1809                  * pqi_get_physical_disk_info() because it's a fairly large
1810                  * buffer.
1811                  */
1812                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1813                 if (!id_phys) {
1814                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1815                                 out_of_memory_msg);
1816                         rc = -ENOMEM;
1817                         goto out;
1818                 }
1819         }
1820
1821         num_new_devices = num_physicals + num_logicals;
1822
1823         new_device_list = kmalloc(sizeof(*new_device_list) *
1824                 num_new_devices, GFP_KERNEL);
1825         if (!new_device_list) {
1826                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1827                 rc = -ENOMEM;
1828                 goto out;
1829         }
1830
1831         for (i = 0; i < num_new_devices; i++) {
1832                 device = kzalloc(sizeof(*device), GFP_KERNEL);
1833                 if (!device) {
1834                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1835                                 out_of_memory_msg);
1836                         rc = -ENOMEM;
1837                         goto out;
1838                 }
1839                 list_add_tail(&device->new_device_list_entry,
1840                         &new_device_list_head);
1841         }
1842
1843         device = NULL;
1844         num_valid_devices = 0;
1845
1846         for (i = 0; i < num_new_devices; i++) {
1847
1848                 if (i < num_physicals) {
1849                         is_physical_device = true;
1850                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
1851                         log_lun_ext_entry = NULL;
1852                         scsi3addr = phys_lun_ext_entry->lunid;
1853                 } else {
1854                         is_physical_device = false;
1855                         phys_lun_ext_entry = NULL;
1856                         log_lun_ext_entry =
1857                                 &logdev_list->lun_entries[i - num_physicals];
1858                         scsi3addr = log_lun_ext_entry->lunid;
1859                 }
1860
1861                 if (is_physical_device && pqi_skip_device(scsi3addr))
1862                         continue;
1863
1864                 if (device)
1865                         device = list_next_entry(device, new_device_list_entry);
1866                 else
1867                         device = list_first_entry(&new_device_list_head,
1868                                 struct pqi_scsi_dev, new_device_list_entry);
1869
1870                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1871                 device->is_physical_device = is_physical_device;
1872                 if (!is_physical_device)
1873                         device->is_external_raid_device =
1874                                 pqi_is_external_raid_addr(scsi3addr);
1875
1876                 /* Gather information about the device. */
1877                 rc = pqi_get_device_info(ctrl_info, device);
1878                 if (rc == -ENOMEM) {
1879                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1880                                 out_of_memory_msg);
1881                         goto out;
1882                 }
1883                 if (rc) {
1884                         if (device->is_physical_device)
1885                                 dev_warn(&ctrl_info->pci_dev->dev,
1886                                         "obtaining device info failed, skipping physical device %016llx\n",
1887                                         get_unaligned_be64(
1888                                                 &phys_lun_ext_entry->wwid));
1889                         else
1890                                 dev_warn(&ctrl_info->pci_dev->dev,
1891                                         "obtaining device info failed, skipping logical device %08x%08x\n",
1892                                         *((u32 *)&device->scsi3addr),
1893                                         *((u32 *)&device->scsi3addr[4]));
1894                         rc = 0;
1895                         continue;
1896                 }
1897
1898                 if (!pqi_is_supported_device(device))
1899                         continue;
1900
1901                 pqi_assign_bus_target_lun(device);
1902
1903                 if (device->is_physical_device) {
1904                         device->wwid = phys_lun_ext_entry->wwid;
1905                         if ((phys_lun_ext_entry->device_flags &
1906                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1907                                 phys_lun_ext_entry->aio_handle)
1908                                 device->aio_enabled = true;
1909                 } else {
1910                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1911                                 sizeof(device->volume_id));
1912                 }
1913
1914                 switch (device->devtype) {
1915                 case TYPE_DISK:
1916                 case TYPE_ZBC:
1917                 case TYPE_ENCLOSURE:
1918                         if (device->is_physical_device) {
1919                                 device->sas_address =
1920                                         get_unaligned_be64(&device->wwid);
1921                                 if (device->devtype == TYPE_DISK ||
1922                                         device->devtype == TYPE_ZBC) {
1923                                         device->aio_handle =
1924                                                 phys_lun_ext_entry->aio_handle;
1925                                         pqi_get_physical_disk_info(ctrl_info,
1926                                                 device, id_phys);
1927                                 }
1928                         }
1929                         break;
1930                 }
1931
1932                 new_device_list[num_valid_devices++] = device;
1933         }
1934
1935         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1936
1937 out:
1938         list_for_each_entry_safe(device, next, &new_device_list_head,
1939                 new_device_list_entry) {
1940                 if (device->keep_device)
1941                         continue;
1942                 list_del(&device->new_device_list_entry);
1943                 pqi_free_device(device);
1944         }
1945
1946         kfree(new_device_list);
1947         kfree(physdev_list);
1948         kfree(logdev_list);
1949         kfree(id_phys);
1950
1951         return rc;
1952 }
1953
1954 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1955 {
1956         unsigned long flags;
1957         struct pqi_scsi_dev *device;
1958
1959         while (1) {
1960                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1961
1962                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
1963                         struct pqi_scsi_dev, scsi_device_list_entry);
1964                 if (device)
1965                         list_del(&device->scsi_device_list_entry);
1966
1967                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
1968                         flags);
1969
1970                 if (!device)
1971                         break;
1972
1973                 if (device->sdev)
1974                         pqi_remove_device(ctrl_info, device);
1975                 pqi_free_device(device);
1976         }
1977 }
1978
1979 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1980 {
1981         int rc;
1982
1983         if (pqi_ctrl_offline(ctrl_info))
1984                 return -ENXIO;
1985
1986         mutex_lock(&ctrl_info->scan_mutex);
1987
1988         rc = pqi_update_scsi_devices(ctrl_info);
1989         if (rc)
1990                 pqi_schedule_rescan_worker_delayed(ctrl_info);
1991
1992         mutex_unlock(&ctrl_info->scan_mutex);
1993
1994         return rc;
1995 }
1996
1997 static void pqi_scan_start(struct Scsi_Host *shost)
1998 {
1999         pqi_scan_scsi_devices(shost_to_hba(shost));
2000 }
2001
2002 /* Returns TRUE if scan is finished. */
2003
2004 static int pqi_scan_finished(struct Scsi_Host *shost,
2005         unsigned long elapsed_time)
2006 {
2007         struct pqi_ctrl_info *ctrl_info;
2008
2009         ctrl_info = shost_priv(shost);
2010
2011         return !mutex_is_locked(&ctrl_info->scan_mutex);
2012 }
2013
2014 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2015 {
2016         mutex_lock(&ctrl_info->scan_mutex);
2017         mutex_unlock(&ctrl_info->scan_mutex);
2018 }
2019
2020 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2021 {
2022         mutex_lock(&ctrl_info->lun_reset_mutex);
2023         mutex_unlock(&ctrl_info->lun_reset_mutex);
2024 }
2025
2026 static inline void pqi_set_encryption_info(
2027         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2028         u64 first_block)
2029 {
2030         u32 volume_blk_size;
2031
2032         /*
2033          * Set the encryption tweak values based on logical block address.
2034          * If the block size is 512, the tweak value is equal to the LBA.
2035          * For other block sizes, tweak value is (LBA * block size) / 512.
2036          */
2037         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2038         if (volume_blk_size != 512)
2039                 first_block = (first_block * volume_blk_size) / 512;
2040
2041         encryption_info->data_encryption_key_index =
2042                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2043         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2044         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2045 }
2046
2047 /*
2048  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2049  */
2050
2051 #define PQI_RAID_BYPASS_INELIGIBLE      1
2052
2053 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2054         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2055         struct pqi_queue_group *queue_group)
2056 {
2057         struct raid_map *raid_map;
2058         bool is_write = false;
2059         u32 map_index;
2060         u64 first_block;
2061         u64 last_block;
2062         u32 block_cnt;
2063         u32 blocks_per_row;
2064         u64 first_row;
2065         u64 last_row;
2066         u32 first_row_offset;
2067         u32 last_row_offset;
2068         u32 first_column;
2069         u32 last_column;
2070         u64 r0_first_row;
2071         u64 r0_last_row;
2072         u32 r5or6_blocks_per_row;
2073         u64 r5or6_first_row;
2074         u64 r5or6_last_row;
2075         u32 r5or6_first_row_offset;
2076         u32 r5or6_last_row_offset;
2077         u32 r5or6_first_column;
2078         u32 r5or6_last_column;
2079         u16 data_disks_per_row;
2080         u32 total_disks_per_row;
2081         u16 layout_map_count;
2082         u32 stripesize;
2083         u16 strip_size;
2084         u32 first_group;
2085         u32 last_group;
2086         u32 current_group;
2087         u32 map_row;
2088         u32 aio_handle;
2089         u64 disk_block;
2090         u32 disk_block_cnt;
2091         u8 cdb[16];
2092         u8 cdb_length;
2093         int offload_to_mirror;
2094         struct pqi_encryption_info *encryption_info_ptr;
2095         struct pqi_encryption_info encryption_info;
2096 #if BITS_PER_LONG == 32
2097         u64 tmpdiv;
2098 #endif
2099
2100         /* Check for valid opcode, get LBA and block count. */
2101         switch (scmd->cmnd[0]) {
2102         case WRITE_6:
2103                 is_write = true;
2104                 /* fall through */
2105         case READ_6:
2106                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2107                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2108                 block_cnt = (u32)scmd->cmnd[4];
2109                 if (block_cnt == 0)
2110                         block_cnt = 256;
2111                 break;
2112         case WRITE_10:
2113                 is_write = true;
2114                 /* fall through */
2115         case READ_10:
2116                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2117                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2118                 break;
2119         case WRITE_12:
2120                 is_write = true;
2121                 /* fall through */
2122         case READ_12:
2123                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2124                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2125                 break;
2126         case WRITE_16:
2127                 is_write = true;
2128                 /* fall through */
2129         case READ_16:
2130                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2131                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2132                 break;
2133         default:
2134                 /* Process via normal I/O path. */
2135                 return PQI_RAID_BYPASS_INELIGIBLE;
2136         }
2137
2138         /* Check for write to non-RAID-0. */
2139         if (is_write && device->raid_level != SA_RAID_0)
2140                 return PQI_RAID_BYPASS_INELIGIBLE;
2141
2142         if (unlikely(block_cnt == 0))
2143                 return PQI_RAID_BYPASS_INELIGIBLE;
2144
2145         last_block = first_block + block_cnt - 1;
2146         raid_map = device->raid_map;
2147
2148         /* Check for invalid block or wraparound. */
2149         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2150                 last_block < first_block)
2151                 return PQI_RAID_BYPASS_INELIGIBLE;
2152
2153         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2154         strip_size = get_unaligned_le16(&raid_map->strip_size);
2155         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2156
2157         /* Calculate stripe information for the request. */
2158         blocks_per_row = data_disks_per_row * strip_size;
2159 #if BITS_PER_LONG == 32
2160         tmpdiv = first_block;
2161         do_div(tmpdiv, blocks_per_row);
2162         first_row = tmpdiv;
2163         tmpdiv = last_block;
2164         do_div(tmpdiv, blocks_per_row);
2165         last_row = tmpdiv;
2166         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2167         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2168         tmpdiv = first_row_offset;
2169         do_div(tmpdiv, strip_size);
2170         first_column = tmpdiv;
2171         tmpdiv = last_row_offset;
2172         do_div(tmpdiv, strip_size);
2173         last_column = tmpdiv;
2174 #else
2175         first_row = first_block / blocks_per_row;
2176         last_row = last_block / blocks_per_row;
2177         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2178         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2179         first_column = first_row_offset / strip_size;
2180         last_column = last_row_offset / strip_size;
2181 #endif
2182
2183         /* If this isn't a single row/column then give to the controller. */
2184         if (first_row != last_row || first_column != last_column)
2185                 return PQI_RAID_BYPASS_INELIGIBLE;
2186
2187         /* Proceeding with driver mapping. */
2188         total_disks_per_row = data_disks_per_row +
2189                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2190         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2191                 get_unaligned_le16(&raid_map->row_cnt);
2192         map_index = (map_row * total_disks_per_row) + first_column;
2193
2194         /* RAID 1 */
2195         if (device->raid_level == SA_RAID_1) {
2196                 if (device->offload_to_mirror)
2197                         map_index += data_disks_per_row;
2198                 device->offload_to_mirror = !device->offload_to_mirror;
2199         } else if (device->raid_level == SA_RAID_ADM) {
2200                 /* RAID ADM */
2201                 /*
2202                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2203                  * divisible by 3.
2204                  */
2205                 offload_to_mirror = device->offload_to_mirror;
2206                 if (offload_to_mirror == 0)  {
2207                         /* use physical disk in the first mirrored group. */
2208                         map_index %= data_disks_per_row;
2209                 } else {
2210                         do {
2211                                 /*
2212                                  * Determine mirror group that map_index
2213                                  * indicates.
2214                                  */
2215                                 current_group = map_index / data_disks_per_row;
2216
2217                                 if (offload_to_mirror != current_group) {
2218                                         if (current_group <
2219                                                 layout_map_count - 1) {
2220                                                 /*
2221                                                  * Select raid index from
2222                                                  * next group.
2223                                                  */
2224                                                 map_index += data_disks_per_row;
2225                                                 current_group++;
2226                                         } else {
2227                                                 /*
2228                                                  * Select raid index from first
2229                                                  * group.
2230                                                  */
2231                                                 map_index %= data_disks_per_row;
2232                                                 current_group = 0;
2233                                         }
2234                                 }
2235                         } while (offload_to_mirror != current_group);
2236                 }
2237
2238                 /* Set mirror group to use next time. */
2239                 offload_to_mirror =
2240                         (offload_to_mirror >= layout_map_count - 1) ?
2241                                 0 : offload_to_mirror + 1;
2242                 WARN_ON(offload_to_mirror >= layout_map_count);
2243                 device->offload_to_mirror = offload_to_mirror;
2244                 /*
2245                  * Avoid direct use of device->offload_to_mirror within this
2246                  * function since multiple threads might simultaneously
2247                  * increment it beyond the range of device->layout_map_count -1.
2248                  */
2249         } else if ((device->raid_level == SA_RAID_5 ||
2250                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2251                 /* RAID 50/60 */
2252                 /* Verify first and last block are in same RAID group */
2253                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2254                 stripesize = r5or6_blocks_per_row * layout_map_count;
2255 #if BITS_PER_LONG == 32
2256                 tmpdiv = first_block;
2257                 first_group = do_div(tmpdiv, stripesize);
2258                 tmpdiv = first_group;
2259                 do_div(tmpdiv, r5or6_blocks_per_row);
2260                 first_group = tmpdiv;
2261                 tmpdiv = last_block;
2262                 last_group = do_div(tmpdiv, stripesize);
2263                 tmpdiv = last_group;
2264                 do_div(tmpdiv, r5or6_blocks_per_row);
2265                 last_group = tmpdiv;
2266 #else
2267                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2268                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2269 #endif
2270                 if (first_group != last_group)
2271                         return PQI_RAID_BYPASS_INELIGIBLE;
2272
2273                 /* Verify request is in a single row of RAID 5/6 */
2274 #if BITS_PER_LONG == 32
2275                 tmpdiv = first_block;
2276                 do_div(tmpdiv, stripesize);
2277                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2278                 tmpdiv = last_block;
2279                 do_div(tmpdiv, stripesize);
2280                 r5or6_last_row = r0_last_row = tmpdiv;
2281 #else
2282                 first_row = r5or6_first_row = r0_first_row =
2283                         first_block / stripesize;
2284                 r5or6_last_row = r0_last_row = last_block / stripesize;
2285 #endif
2286                 if (r5or6_first_row != r5or6_last_row)
2287                         return PQI_RAID_BYPASS_INELIGIBLE;
2288
2289                 /* Verify request is in a single column */
2290 #if BITS_PER_LONG == 32
2291                 tmpdiv = first_block;
2292                 first_row_offset = do_div(tmpdiv, stripesize);
2293                 tmpdiv = first_row_offset;
2294                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2295                 r5or6_first_row_offset = first_row_offset;
2296                 tmpdiv = last_block;
2297                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2298                 tmpdiv = r5or6_last_row_offset;
2299                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2300                 tmpdiv = r5or6_first_row_offset;
2301                 do_div(tmpdiv, strip_size);
2302                 first_column = r5or6_first_column = tmpdiv;
2303                 tmpdiv = r5or6_last_row_offset;
2304                 do_div(tmpdiv, strip_size);
2305                 r5or6_last_column = tmpdiv;
2306 #else
2307                 first_row_offset = r5or6_first_row_offset =
2308                         (u32)((first_block % stripesize) %
2309                         r5or6_blocks_per_row);
2310
2311                 r5or6_last_row_offset =
2312                         (u32)((last_block % stripesize) %
2313                         r5or6_blocks_per_row);
2314
2315                 first_column = r5or6_first_row_offset / strip_size;
2316                 r5or6_first_column = first_column;
2317                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2318 #endif
2319                 if (r5or6_first_column != r5or6_last_column)
2320                         return PQI_RAID_BYPASS_INELIGIBLE;
2321
2322                 /* Request is eligible */
2323                 map_row =
2324                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2325                         get_unaligned_le16(&raid_map->row_cnt);
2326
2327                 map_index = (first_group *
2328                         (get_unaligned_le16(&raid_map->row_cnt) *
2329                         total_disks_per_row)) +
2330                         (map_row * total_disks_per_row) + first_column;
2331         }
2332
2333         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2334                 return PQI_RAID_BYPASS_INELIGIBLE;
2335
2336         aio_handle = raid_map->disk_data[map_index].aio_handle;
2337         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2338                 first_row * strip_size +
2339                 (first_row_offset - first_column * strip_size);
2340         disk_block_cnt = block_cnt;
2341
2342         /* Handle differing logical/physical block sizes. */
2343         if (raid_map->phys_blk_shift) {
2344                 disk_block <<= raid_map->phys_blk_shift;
2345                 disk_block_cnt <<= raid_map->phys_blk_shift;
2346         }
2347
2348         if (unlikely(disk_block_cnt > 0xffff))
2349                 return PQI_RAID_BYPASS_INELIGIBLE;
2350
2351         /* Build the new CDB for the physical disk I/O. */
2352         if (disk_block > 0xffffffff) {
2353                 cdb[0] = is_write ? WRITE_16 : READ_16;
2354                 cdb[1] = 0;
2355                 put_unaligned_be64(disk_block, &cdb[2]);
2356                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2357                 cdb[14] = 0;
2358                 cdb[15] = 0;
2359                 cdb_length = 16;
2360         } else {
2361                 cdb[0] = is_write ? WRITE_10 : READ_10;
2362                 cdb[1] = 0;
2363                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2364                 cdb[6] = 0;
2365                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2366                 cdb[9] = 0;
2367                 cdb_length = 10;
2368         }
2369
2370         if (get_unaligned_le16(&raid_map->flags) &
2371                 RAID_MAP_ENCRYPTION_ENABLED) {
2372                 pqi_set_encryption_info(&encryption_info, raid_map,
2373                         first_block);
2374                 encryption_info_ptr = &encryption_info;
2375         } else {
2376                 encryption_info_ptr = NULL;
2377         }
2378
2379         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2380                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2381 }
2382
2383 #define PQI_STATUS_IDLE         0x0
2384
2385 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2386 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2387
2388 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2389 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2390 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2391 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2392 #define PQI_DEVICE_STATE_ERROR                          0x4
2393
2394 #define PQI_MODE_READY_TIMEOUT_SECS             30
2395 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2396
2397 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2398 {
2399         struct pqi_device_registers __iomem *pqi_registers;
2400         unsigned long timeout;
2401         u64 signature;
2402         u8 status;
2403
2404         pqi_registers = ctrl_info->pqi_registers;
2405         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2406
2407         while (1) {
2408                 signature = readq(&pqi_registers->signature);
2409                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2410                         sizeof(signature)) == 0)
2411                         break;
2412                 if (time_after(jiffies, timeout)) {
2413                         dev_err(&ctrl_info->pci_dev->dev,
2414                                 "timed out waiting for PQI signature\n");
2415                         return -ETIMEDOUT;
2416                 }
2417                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2418         }
2419
2420         while (1) {
2421                 status = readb(&pqi_registers->function_and_status_code);
2422                 if (status == PQI_STATUS_IDLE)
2423                         break;
2424                 if (time_after(jiffies, timeout)) {
2425                         dev_err(&ctrl_info->pci_dev->dev,
2426                                 "timed out waiting for PQI IDLE\n");
2427                         return -ETIMEDOUT;
2428                 }
2429                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2430         }
2431
2432         while (1) {
2433                 if (readl(&pqi_registers->device_status) ==
2434                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2435                         break;
2436                 if (time_after(jiffies, timeout)) {
2437                         dev_err(&ctrl_info->pci_dev->dev,
2438                                 "timed out waiting for PQI all registers ready\n");
2439                         return -ETIMEDOUT;
2440                 }
2441                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2442         }
2443
2444         return 0;
2445 }
2446
2447 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2448 {
2449         struct pqi_scsi_dev *device;
2450
2451         device = io_request->scmd->device->hostdata;
2452         device->raid_bypass_enabled = false;
2453         device->aio_enabled = false;
2454 }
2455
2456 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2457 {
2458         struct pqi_ctrl_info *ctrl_info;
2459         struct pqi_scsi_dev *device;
2460
2461         device = sdev->hostdata;
2462         if (device->device_offline)
2463                 return;
2464
2465         device->device_offline = true;
2466         scsi_device_set_state(sdev, SDEV_OFFLINE);
2467         ctrl_info = shost_to_hba(sdev->host);
2468         pqi_schedule_rescan_worker(ctrl_info);
2469         dev_err(&ctrl_info->pci_dev->dev, "offlined %s scsi %d:%d:%d:%d\n",
2470                 path, ctrl_info->scsi_host->host_no, device->bus,
2471                 device->target, device->lun);
2472 }
2473
2474 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2475 {
2476         u8 scsi_status;
2477         u8 host_byte;
2478         struct scsi_cmnd *scmd;
2479         struct pqi_raid_error_info *error_info;
2480         size_t sense_data_length;
2481         int residual_count;
2482         int xfer_count;
2483         struct scsi_sense_hdr sshdr;
2484
2485         scmd = io_request->scmd;
2486         if (!scmd)
2487                 return;
2488
2489         error_info = io_request->error_info;
2490         scsi_status = error_info->status;
2491         host_byte = DID_OK;
2492
2493         switch (error_info->data_out_result) {
2494         case PQI_DATA_IN_OUT_GOOD:
2495                 break;
2496         case PQI_DATA_IN_OUT_UNDERFLOW:
2497                 xfer_count =
2498                         get_unaligned_le32(&error_info->data_out_transferred);
2499                 residual_count = scsi_bufflen(scmd) - xfer_count;
2500                 scsi_set_resid(scmd, residual_count);
2501                 if (xfer_count < scmd->underflow)
2502                         host_byte = DID_SOFT_ERROR;
2503                 break;
2504         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2505         case PQI_DATA_IN_OUT_ABORTED:
2506                 host_byte = DID_ABORT;
2507                 break;
2508         case PQI_DATA_IN_OUT_TIMEOUT:
2509                 host_byte = DID_TIME_OUT;
2510                 break;
2511         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2512         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2513         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2514         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2515         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2516         case PQI_DATA_IN_OUT_ERROR:
2517         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2518         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2519         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2520         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2521         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2522         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2523         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2524         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2525         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2526         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2527         default:
2528                 host_byte = DID_ERROR;
2529                 break;
2530         }
2531
2532         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2533         if (sense_data_length == 0)
2534                 sense_data_length =
2535                         get_unaligned_le16(&error_info->response_data_length);
2536         if (sense_data_length) {
2537                 if (sense_data_length > sizeof(error_info->data))
2538                         sense_data_length = sizeof(error_info->data);
2539
2540                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2541                         scsi_normalize_sense(error_info->data,
2542                                 sense_data_length, &sshdr) &&
2543                                 sshdr.sense_key == HARDWARE_ERROR &&
2544                                 sshdr.asc == 0x3e &&
2545                                 sshdr.ascq == 0x1) {
2546                         pqi_take_device_offline(scmd->device, "RAID");
2547                         host_byte = DID_NO_CONNECT;
2548                 }
2549
2550                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2551                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2552                 memcpy(scmd->sense_buffer, error_info->data,
2553                         sense_data_length);
2554         }
2555
2556         scmd->result = scsi_status;
2557         set_host_byte(scmd, host_byte);
2558 }
2559
2560 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2561 {
2562         u8 scsi_status;
2563         u8 host_byte;
2564         struct scsi_cmnd *scmd;
2565         struct pqi_aio_error_info *error_info;
2566         size_t sense_data_length;
2567         int residual_count;
2568         int xfer_count;
2569         bool device_offline;
2570
2571         scmd = io_request->scmd;
2572         error_info = io_request->error_info;
2573         host_byte = DID_OK;
2574         sense_data_length = 0;
2575         device_offline = false;
2576
2577         switch (error_info->service_response) {
2578         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2579                 scsi_status = error_info->status;
2580                 break;
2581         case PQI_AIO_SERV_RESPONSE_FAILURE:
2582                 switch (error_info->status) {
2583                 case PQI_AIO_STATUS_IO_ABORTED:
2584                         scsi_status = SAM_STAT_TASK_ABORTED;
2585                         break;
2586                 case PQI_AIO_STATUS_UNDERRUN:
2587                         scsi_status = SAM_STAT_GOOD;
2588                         residual_count = get_unaligned_le32(
2589                                                 &error_info->residual_count);
2590                         scsi_set_resid(scmd, residual_count);
2591                         xfer_count = scsi_bufflen(scmd) - residual_count;
2592                         if (xfer_count < scmd->underflow)
2593                                 host_byte = DID_SOFT_ERROR;
2594                         break;
2595                 case PQI_AIO_STATUS_OVERRUN:
2596                         scsi_status = SAM_STAT_GOOD;
2597                         break;
2598                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2599                         pqi_aio_path_disabled(io_request);
2600                         scsi_status = SAM_STAT_GOOD;
2601                         io_request->status = -EAGAIN;
2602                         break;
2603                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2604                 case PQI_AIO_STATUS_INVALID_DEVICE:
2605                         if (!io_request->raid_bypass) {
2606                                 device_offline = true;
2607                                 pqi_take_device_offline(scmd->device, "AIO");
2608                                 host_byte = DID_NO_CONNECT;
2609                         }
2610                         scsi_status = SAM_STAT_CHECK_CONDITION;
2611                         break;
2612                 case PQI_AIO_STATUS_IO_ERROR:
2613                 default:
2614                         scsi_status = SAM_STAT_CHECK_CONDITION;
2615                         break;
2616                 }
2617                 break;
2618         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2619         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2620                 scsi_status = SAM_STAT_GOOD;
2621                 break;
2622         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2623         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2624         default:
2625                 scsi_status = SAM_STAT_CHECK_CONDITION;
2626                 break;
2627         }
2628
2629         if (error_info->data_present) {
2630                 sense_data_length =
2631                         get_unaligned_le16(&error_info->data_length);
2632                 if (sense_data_length) {
2633                         if (sense_data_length > sizeof(error_info->data))
2634                                 sense_data_length = sizeof(error_info->data);
2635                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2636                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2637                         memcpy(scmd->sense_buffer, error_info->data,
2638                                 sense_data_length);
2639                 }
2640         }
2641
2642         if (device_offline && sense_data_length == 0)
2643                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2644                         0x3e, 0x1);
2645
2646         scmd->result = scsi_status;
2647         set_host_byte(scmd, host_byte);
2648 }
2649
2650 static void pqi_process_io_error(unsigned int iu_type,
2651         struct pqi_io_request *io_request)
2652 {
2653         switch (iu_type) {
2654         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2655                 pqi_process_raid_io_error(io_request);
2656                 break;
2657         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2658                 pqi_process_aio_io_error(io_request);
2659                 break;
2660         }
2661 }
2662
2663 static int pqi_interpret_task_management_response(
2664         struct pqi_task_management_response *response)
2665 {
2666         int rc;
2667
2668         switch (response->response_code) {
2669         case SOP_TMF_COMPLETE:
2670         case SOP_TMF_FUNCTION_SUCCEEDED:
2671                 rc = 0;
2672                 break;
2673         default:
2674                 rc = -EIO;
2675                 break;
2676         }
2677
2678         return rc;
2679 }
2680
2681 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2682         struct pqi_queue_group *queue_group)
2683 {
2684         unsigned int num_responses;
2685         pqi_index_t oq_pi;
2686         pqi_index_t oq_ci;
2687         struct pqi_io_request *io_request;
2688         struct pqi_io_response *response;
2689         u16 request_id;
2690
2691         num_responses = 0;
2692         oq_ci = queue_group->oq_ci_copy;
2693
2694         while (1) {
2695                 oq_pi = *queue_group->oq_pi;
2696                 if (oq_pi == oq_ci)
2697                         break;
2698
2699                 num_responses++;
2700                 response = queue_group->oq_element_array +
2701                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2702
2703                 request_id = get_unaligned_le16(&response->request_id);
2704                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2705
2706                 io_request = &ctrl_info->io_request_pool[request_id];
2707                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2708
2709                 switch (response->header.iu_type) {
2710                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2711                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2712                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2713                         break;
2714                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2715                         io_request->status =
2716                                 pqi_interpret_task_management_response(
2717                                         (void *)response);
2718                         break;
2719                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2720                         pqi_aio_path_disabled(io_request);
2721                         io_request->status = -EAGAIN;
2722                         break;
2723                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2724                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2725                         io_request->error_info = ctrl_info->error_buffer +
2726                                 (get_unaligned_le16(&response->error_index) *
2727                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2728                         pqi_process_io_error(response->header.iu_type,
2729                                 io_request);
2730                         break;
2731                 default:
2732                         dev_err(&ctrl_info->pci_dev->dev,
2733                                 "unexpected IU type: 0x%x\n",
2734                                 response->header.iu_type);
2735                         break;
2736                 }
2737
2738                 io_request->io_complete_callback(io_request,
2739                         io_request->context);
2740
2741                 /*
2742                  * Note that the I/O request structure CANNOT BE TOUCHED after
2743                  * returning from the I/O completion callback!
2744                  */
2745
2746                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2747         }
2748
2749         if (num_responses) {
2750                 queue_group->oq_ci_copy = oq_ci;
2751                 writel(oq_ci, queue_group->oq_ci);
2752         }
2753
2754         return num_responses;
2755 }
2756
2757 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2758         unsigned int ci, unsigned int elements_in_queue)
2759 {
2760         unsigned int num_elements_used;
2761
2762         if (pi >= ci)
2763                 num_elements_used = pi - ci;
2764         else
2765                 num_elements_used = elements_in_queue - ci + pi;
2766
2767         return elements_in_queue - num_elements_used - 1;
2768 }
2769
2770 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
2771         struct pqi_event_acknowledge_request *iu, size_t iu_length)
2772 {
2773         pqi_index_t iq_pi;
2774         pqi_index_t iq_ci;
2775         unsigned long flags;
2776         void *next_element;
2777         struct pqi_queue_group *queue_group;
2778
2779         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2780         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2781
2782         while (1) {
2783                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2784
2785                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2786                 iq_ci = *queue_group->iq_ci[RAID_PATH];
2787
2788                 if (pqi_num_elements_free(iq_pi, iq_ci,
2789                         ctrl_info->num_elements_per_iq))
2790                         break;
2791
2792                 spin_unlock_irqrestore(
2793                         &queue_group->submit_lock[RAID_PATH], flags);
2794
2795                 if (pqi_ctrl_offline(ctrl_info))
2796                         return;
2797         }
2798
2799         next_element = queue_group->iq_element_array[RAID_PATH] +
2800                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2801
2802         memcpy(next_element, iu, iu_length);
2803
2804         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2805         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2806
2807         /*
2808          * This write notifies the controller that an IU is available to be
2809          * processed.
2810          */
2811         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2812
2813         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2814 }
2815
2816 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2817         struct pqi_event *event)
2818 {
2819         struct pqi_event_acknowledge_request request;
2820
2821         memset(&request, 0, sizeof(request));
2822
2823         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2824         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2825                 &request.header.iu_length);
2826         request.event_type = event->event_type;
2827         request.event_id = event->event_id;
2828         request.additional_event_id = event->additional_event_id;
2829
2830         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
2831 }
2832
2833 static void pqi_event_worker(struct work_struct *work)
2834 {
2835         unsigned int i;
2836         struct pqi_ctrl_info *ctrl_info;
2837         struct pqi_event *event;
2838
2839         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2840
2841         pqi_ctrl_busy(ctrl_info);
2842         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
2843         if (pqi_ctrl_offline(ctrl_info))
2844                 goto out;
2845
2846         pqi_schedule_rescan_worker_delayed(ctrl_info);
2847
2848         event = ctrl_info->events;
2849         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2850                 if (event->pending) {
2851                         event->pending = false;
2852                         pqi_acknowledge_event(ctrl_info, event);
2853                 }
2854                 event++;
2855         }
2856
2857 out:
2858         pqi_ctrl_unbusy(ctrl_info);
2859 }
2860
2861 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
2862
2863 static void pqi_heartbeat_timer_handler(struct timer_list *t)
2864 {
2865         int num_interrupts;
2866         u32 heartbeat_count;
2867         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
2868                                                      heartbeat_timer);
2869
2870         pqi_check_ctrl_health(ctrl_info);
2871         if (pqi_ctrl_offline(ctrl_info))
2872                 return;
2873
2874         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2875         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
2876
2877         if (num_interrupts == ctrl_info->previous_num_interrupts) {
2878                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
2879                         dev_err(&ctrl_info->pci_dev->dev,
2880                                 "no heartbeat detected - last heartbeat count: %u\n",
2881                                 heartbeat_count);
2882                         pqi_take_ctrl_offline(ctrl_info);
2883                         return;
2884                 }
2885         } else {
2886                 ctrl_info->previous_num_interrupts = num_interrupts;
2887         }
2888
2889         ctrl_info->previous_heartbeat_count = heartbeat_count;
2890         mod_timer(&ctrl_info->heartbeat_timer,
2891                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2892 }
2893
2894 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2895 {
2896         if (!ctrl_info->heartbeat_counter)
2897                 return;
2898
2899         ctrl_info->previous_num_interrupts =
2900                 atomic_read(&ctrl_info->num_interrupts);
2901         ctrl_info->previous_heartbeat_count =
2902                 pqi_read_heartbeat_counter(ctrl_info);
2903
2904         ctrl_info->heartbeat_timer.expires =
2905                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2906         add_timer(&ctrl_info->heartbeat_timer);
2907 }
2908
2909 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2910 {
2911         del_timer_sync(&ctrl_info->heartbeat_timer);
2912 }
2913
2914 static inline int pqi_event_type_to_event_index(unsigned int event_type)
2915 {
2916         int index;
2917
2918         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
2919                 if (event_type == pqi_supported_event_types[index])
2920                         return index;
2921
2922         return -1;
2923 }
2924
2925 static inline bool pqi_is_supported_event(unsigned int event_type)
2926 {
2927         return pqi_event_type_to_event_index(event_type) != -1;
2928 }
2929
2930 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
2931 {
2932         unsigned int num_events;
2933         pqi_index_t oq_pi;
2934         pqi_index_t oq_ci;
2935         struct pqi_event_queue *event_queue;
2936         struct pqi_event_response *response;
2937         struct pqi_event *event;
2938         int event_index;
2939
2940         event_queue = &ctrl_info->event_queue;
2941         num_events = 0;
2942         oq_ci = event_queue->oq_ci_copy;
2943
2944         while (1) {
2945                 oq_pi = *event_queue->oq_pi;
2946                 if (oq_pi == oq_ci)
2947                         break;
2948
2949                 num_events++;
2950                 response = event_queue->oq_element_array +
2951                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
2952
2953                 event_index =
2954                         pqi_event_type_to_event_index(response->event_type);
2955
2956                 if (event_index >= 0) {
2957                         if (response->request_acknowlege) {
2958                                 event = &ctrl_info->events[event_index];
2959                                 event->pending = true;
2960                                 event->event_type = response->event_type;
2961                                 event->event_id = response->event_id;
2962                                 event->additional_event_id =
2963                                         response->additional_event_id;
2964                         }
2965                 }
2966
2967                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
2968         }
2969
2970         if (num_events) {
2971                 event_queue->oq_ci_copy = oq_ci;
2972                 writel(oq_ci, event_queue->oq_ci);
2973                 schedule_work(&ctrl_info->event_work);
2974         }
2975
2976         return num_events;
2977 }
2978
2979 #define PQI_LEGACY_INTX_MASK    0x1
2980
2981 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
2982                                                 bool enable_intx)
2983 {
2984         u32 intx_mask;
2985         struct pqi_device_registers __iomem *pqi_registers;
2986         volatile void __iomem *register_addr;
2987
2988         pqi_registers = ctrl_info->pqi_registers;
2989
2990         if (enable_intx)
2991                 register_addr = &pqi_registers->legacy_intx_mask_clear;
2992         else
2993                 register_addr = &pqi_registers->legacy_intx_mask_set;
2994
2995         intx_mask = readl(register_addr);
2996         intx_mask |= PQI_LEGACY_INTX_MASK;
2997         writel(intx_mask, register_addr);
2998 }
2999
3000 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3001         enum pqi_irq_mode new_mode)
3002 {
3003         switch (ctrl_info->irq_mode) {
3004         case IRQ_MODE_MSIX:
3005                 switch (new_mode) {
3006                 case IRQ_MODE_MSIX:
3007                         break;
3008                 case IRQ_MODE_INTX:
3009                         pqi_configure_legacy_intx(ctrl_info, true);
3010                         sis_enable_intx(ctrl_info);
3011                         break;
3012                 case IRQ_MODE_NONE:
3013                         break;
3014                 }
3015                 break;
3016         case IRQ_MODE_INTX:
3017                 switch (new_mode) {
3018                 case IRQ_MODE_MSIX:
3019                         pqi_configure_legacy_intx(ctrl_info, false);
3020                         sis_enable_msix(ctrl_info);
3021                         break;
3022                 case IRQ_MODE_INTX:
3023                         break;
3024                 case IRQ_MODE_NONE:
3025                         pqi_configure_legacy_intx(ctrl_info, false);
3026                         break;
3027                 }
3028                 break;
3029         case IRQ_MODE_NONE:
3030                 switch (new_mode) {
3031                 case IRQ_MODE_MSIX:
3032                         sis_enable_msix(ctrl_info);
3033                         break;
3034                 case IRQ_MODE_INTX:
3035                         pqi_configure_legacy_intx(ctrl_info, true);
3036                         sis_enable_intx(ctrl_info);
3037                         break;
3038                 case IRQ_MODE_NONE:
3039                         break;
3040                 }
3041                 break;
3042         }
3043
3044         ctrl_info->irq_mode = new_mode;
3045 }
3046
3047 #define PQI_LEGACY_INTX_PENDING         0x1
3048
3049 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3050 {
3051         bool valid_irq;
3052         u32 intx_status;
3053
3054         switch (ctrl_info->irq_mode) {
3055         case IRQ_MODE_MSIX:
3056                 valid_irq = true;
3057                 break;
3058         case IRQ_MODE_INTX:
3059                 intx_status =
3060                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3061                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3062                         valid_irq = true;
3063                 else
3064                         valid_irq = false;
3065                 break;
3066         case IRQ_MODE_NONE:
3067         default:
3068                 valid_irq = false;
3069                 break;
3070         }
3071
3072         return valid_irq;
3073 }
3074
3075 static irqreturn_t pqi_irq_handler(int irq, void *data)
3076 {
3077         struct pqi_ctrl_info *ctrl_info;
3078         struct pqi_queue_group *queue_group;
3079         unsigned int num_responses_handled;
3080
3081         queue_group = data;
3082         ctrl_info = queue_group->ctrl_info;
3083
3084         if (!pqi_is_valid_irq(ctrl_info))
3085                 return IRQ_NONE;
3086
3087         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3088
3089         if (irq == ctrl_info->event_irq)
3090                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3091
3092         if (num_responses_handled)
3093                 atomic_inc(&ctrl_info->num_interrupts);
3094
3095         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3096         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3097
3098         return IRQ_HANDLED;
3099 }
3100
3101 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3102 {
3103         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3104         int i;
3105         int rc;
3106
3107         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3108
3109         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3110                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3111                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3112                 if (rc) {
3113                         dev_err(&pci_dev->dev,
3114                                 "irq %u init failed with error %d\n",
3115                                 pci_irq_vector(pci_dev, i), rc);
3116                         return rc;
3117                 }
3118                 ctrl_info->num_msix_vectors_initialized++;
3119         }
3120
3121         return 0;
3122 }
3123
3124 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3125 {
3126         int i;
3127
3128         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3129                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3130                         &ctrl_info->queue_groups[i]);
3131
3132         ctrl_info->num_msix_vectors_initialized = 0;
3133 }
3134
3135 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3136 {
3137         int num_vectors_enabled;
3138
3139         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3140                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3141                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3142         if (num_vectors_enabled < 0) {
3143                 dev_err(&ctrl_info->pci_dev->dev,
3144                         "MSI-X init failed with error %d\n",
3145                         num_vectors_enabled);
3146                 return num_vectors_enabled;
3147         }
3148
3149         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3150         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3151         return 0;
3152 }
3153
3154 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3155 {
3156         if (ctrl_info->num_msix_vectors_enabled) {
3157                 pci_free_irq_vectors(ctrl_info->pci_dev);
3158                 ctrl_info->num_msix_vectors_enabled = 0;
3159         }
3160 }
3161
3162 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3163 {
3164         unsigned int i;
3165         size_t alloc_length;
3166         size_t element_array_length_per_iq;
3167         size_t element_array_length_per_oq;
3168         void *element_array;
3169         void *next_queue_index;
3170         void *aligned_pointer;
3171         unsigned int num_inbound_queues;
3172         unsigned int num_outbound_queues;
3173         unsigned int num_queue_indexes;
3174         struct pqi_queue_group *queue_group;
3175
3176         element_array_length_per_iq =
3177                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3178                 ctrl_info->num_elements_per_iq;
3179         element_array_length_per_oq =
3180                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3181                 ctrl_info->num_elements_per_oq;
3182         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3183         num_outbound_queues = ctrl_info->num_queue_groups;
3184         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3185
3186         aligned_pointer = NULL;
3187
3188         for (i = 0; i < num_inbound_queues; i++) {
3189                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3190                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3191                 aligned_pointer += element_array_length_per_iq;
3192         }
3193
3194         for (i = 0; i < num_outbound_queues; i++) {
3195                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3196                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3197                 aligned_pointer += element_array_length_per_oq;
3198         }
3199
3200         aligned_pointer = PTR_ALIGN(aligned_pointer,
3201                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3202         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3203                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3204
3205         for (i = 0; i < num_queue_indexes; i++) {
3206                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3207                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3208                 aligned_pointer += sizeof(pqi_index_t);
3209         }
3210
3211         alloc_length = (size_t)aligned_pointer +
3212                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3213
3214         alloc_length += PQI_EXTRA_SGL_MEMORY;
3215
3216         ctrl_info->queue_memory_base =
3217                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3218                         alloc_length,
3219                         &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3220
3221         if (!ctrl_info->queue_memory_base)
3222                 return -ENOMEM;
3223
3224         ctrl_info->queue_memory_length = alloc_length;
3225
3226         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3227                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3228
3229         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3230                 queue_group = &ctrl_info->queue_groups[i];
3231                 queue_group->iq_element_array[RAID_PATH] = element_array;
3232                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3233                         ctrl_info->queue_memory_base_dma_handle +
3234                                 (element_array - ctrl_info->queue_memory_base);
3235                 element_array += element_array_length_per_iq;
3236                 element_array = PTR_ALIGN(element_array,
3237                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3238                 queue_group->iq_element_array[AIO_PATH] = element_array;
3239                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3240                         ctrl_info->queue_memory_base_dma_handle +
3241                         (element_array - ctrl_info->queue_memory_base);
3242                 element_array += element_array_length_per_iq;
3243                 element_array = PTR_ALIGN(element_array,
3244                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3245         }
3246
3247         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3248                 queue_group = &ctrl_info->queue_groups[i];
3249                 queue_group->oq_element_array = element_array;
3250                 queue_group->oq_element_array_bus_addr =
3251                         ctrl_info->queue_memory_base_dma_handle +
3252                         (element_array - ctrl_info->queue_memory_base);
3253                 element_array += element_array_length_per_oq;
3254                 element_array = PTR_ALIGN(element_array,
3255                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3256         }
3257
3258         ctrl_info->event_queue.oq_element_array = element_array;
3259         ctrl_info->event_queue.oq_element_array_bus_addr =
3260                 ctrl_info->queue_memory_base_dma_handle +
3261                 (element_array - ctrl_info->queue_memory_base);
3262         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3263                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3264
3265         next_queue_index = PTR_ALIGN(element_array,
3266                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3267
3268         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3269                 queue_group = &ctrl_info->queue_groups[i];
3270                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3271                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3272                         ctrl_info->queue_memory_base_dma_handle +
3273                         (next_queue_index - ctrl_info->queue_memory_base);
3274                 next_queue_index += sizeof(pqi_index_t);
3275                 next_queue_index = PTR_ALIGN(next_queue_index,
3276                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3277                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3278                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3279                         ctrl_info->queue_memory_base_dma_handle +
3280                         (next_queue_index - ctrl_info->queue_memory_base);
3281                 next_queue_index += sizeof(pqi_index_t);
3282                 next_queue_index = PTR_ALIGN(next_queue_index,
3283                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3284                 queue_group->oq_pi = next_queue_index;
3285                 queue_group->oq_pi_bus_addr =
3286                         ctrl_info->queue_memory_base_dma_handle +
3287                         (next_queue_index - ctrl_info->queue_memory_base);
3288                 next_queue_index += sizeof(pqi_index_t);
3289                 next_queue_index = PTR_ALIGN(next_queue_index,
3290                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3291         }
3292
3293         ctrl_info->event_queue.oq_pi = next_queue_index;
3294         ctrl_info->event_queue.oq_pi_bus_addr =
3295                 ctrl_info->queue_memory_base_dma_handle +
3296                 (next_queue_index - ctrl_info->queue_memory_base);
3297
3298         return 0;
3299 }
3300
3301 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3302 {
3303         unsigned int i;
3304         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3305         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3306
3307         /*
3308          * Initialize the backpointers to the controller structure in
3309          * each operational queue group structure.
3310          */
3311         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3312                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3313
3314         /*
3315          * Assign IDs to all operational queues.  Note that the IDs
3316          * assigned to operational IQs are independent of the IDs
3317          * assigned to operational OQs.
3318          */
3319         ctrl_info->event_queue.oq_id = next_oq_id++;
3320         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3321                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3322                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3323                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3324         }
3325
3326         /*
3327          * Assign MSI-X table entry indexes to all queues.  Note that the
3328          * interrupt for the event queue is shared with the first queue group.
3329          */
3330         ctrl_info->event_queue.int_msg_num = 0;
3331         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3332                 ctrl_info->queue_groups[i].int_msg_num = i;
3333
3334         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3335                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3336                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3337                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3338                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3339         }
3340 }
3341
3342 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3343 {
3344         size_t alloc_length;
3345         struct pqi_admin_queues_aligned *admin_queues_aligned;
3346         struct pqi_admin_queues *admin_queues;
3347
3348         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3349                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3350
3351         ctrl_info->admin_queue_memory_base =
3352                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3353                         alloc_length,
3354                         &ctrl_info->admin_queue_memory_base_dma_handle,
3355                         GFP_KERNEL);
3356
3357         if (!ctrl_info->admin_queue_memory_base)
3358                 return -ENOMEM;
3359
3360         ctrl_info->admin_queue_memory_length = alloc_length;
3361
3362         admin_queues = &ctrl_info->admin_queues;
3363         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3364                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3365         admin_queues->iq_element_array =
3366                 &admin_queues_aligned->iq_element_array;
3367         admin_queues->oq_element_array =
3368                 &admin_queues_aligned->oq_element_array;
3369         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3370         admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3371
3372         admin_queues->iq_element_array_bus_addr =
3373                 ctrl_info->admin_queue_memory_base_dma_handle +
3374                 (admin_queues->iq_element_array -
3375                 ctrl_info->admin_queue_memory_base);
3376         admin_queues->oq_element_array_bus_addr =
3377                 ctrl_info->admin_queue_memory_base_dma_handle +
3378                 (admin_queues->oq_element_array -
3379                 ctrl_info->admin_queue_memory_base);
3380         admin_queues->iq_ci_bus_addr =
3381                 ctrl_info->admin_queue_memory_base_dma_handle +
3382                 ((void *)admin_queues->iq_ci -
3383                 ctrl_info->admin_queue_memory_base);
3384         admin_queues->oq_pi_bus_addr =
3385                 ctrl_info->admin_queue_memory_base_dma_handle +
3386                 ((void *)admin_queues->oq_pi -
3387                 ctrl_info->admin_queue_memory_base);
3388
3389         return 0;
3390 }
3391
3392 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
3393 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3394
3395 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3396 {
3397         struct pqi_device_registers __iomem *pqi_registers;
3398         struct pqi_admin_queues *admin_queues;
3399         unsigned long timeout;
3400         u8 status;
3401         u32 reg;
3402
3403         pqi_registers = ctrl_info->pqi_registers;
3404         admin_queues = &ctrl_info->admin_queues;
3405
3406         writeq((u64)admin_queues->iq_element_array_bus_addr,
3407                 &pqi_registers->admin_iq_element_array_addr);
3408         writeq((u64)admin_queues->oq_element_array_bus_addr,
3409                 &pqi_registers->admin_oq_element_array_addr);
3410         writeq((u64)admin_queues->iq_ci_bus_addr,
3411                 &pqi_registers->admin_iq_ci_addr);
3412         writeq((u64)admin_queues->oq_pi_bus_addr,
3413                 &pqi_registers->admin_oq_pi_addr);
3414
3415         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3416                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3417                 (admin_queues->int_msg_num << 16);
3418         writel(reg, &pqi_registers->admin_iq_num_elements);
3419         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3420                 &pqi_registers->function_and_status_code);
3421
3422         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3423         while (1) {
3424                 status = readb(&pqi_registers->function_and_status_code);
3425                 if (status == PQI_STATUS_IDLE)
3426                         break;
3427                 if (time_after(jiffies, timeout))
3428                         return -ETIMEDOUT;
3429                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3430         }
3431
3432         /*
3433          * The offset registers are not initialized to the correct
3434          * offsets until *after* the create admin queue pair command
3435          * completes successfully.
3436          */
3437         admin_queues->iq_pi = ctrl_info->iomem_base +
3438                 PQI_DEVICE_REGISTERS_OFFSET +
3439                 readq(&pqi_registers->admin_iq_pi_offset);
3440         admin_queues->oq_ci = ctrl_info->iomem_base +
3441                 PQI_DEVICE_REGISTERS_OFFSET +
3442                 readq(&pqi_registers->admin_oq_ci_offset);
3443
3444         return 0;
3445 }
3446
3447 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3448         struct pqi_general_admin_request *request)
3449 {
3450         struct pqi_admin_queues *admin_queues;
3451         void *next_element;
3452         pqi_index_t iq_pi;
3453
3454         admin_queues = &ctrl_info->admin_queues;
3455         iq_pi = admin_queues->iq_pi_copy;
3456
3457         next_element = admin_queues->iq_element_array +
3458                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3459
3460         memcpy(next_element, request, sizeof(*request));
3461
3462         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3463         admin_queues->iq_pi_copy = iq_pi;
3464
3465         /*
3466          * This write notifies the controller that an IU is available to be
3467          * processed.
3468          */
3469         writel(iq_pi, admin_queues->iq_pi);
3470 }
3471
3472 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3473
3474 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3475         struct pqi_general_admin_response *response)
3476 {
3477         struct pqi_admin_queues *admin_queues;
3478         pqi_index_t oq_pi;
3479         pqi_index_t oq_ci;
3480         unsigned long timeout;
3481
3482         admin_queues = &ctrl_info->admin_queues;
3483         oq_ci = admin_queues->oq_ci_copy;
3484
3485         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
3486
3487         while (1) {
3488                 oq_pi = *admin_queues->oq_pi;
3489                 if (oq_pi != oq_ci)
3490                         break;
3491                 if (time_after(jiffies, timeout)) {
3492                         dev_err(&ctrl_info->pci_dev->dev,
3493                                 "timed out waiting for admin response\n");
3494                         return -ETIMEDOUT;
3495                 }
3496                 if (!sis_is_firmware_running(ctrl_info))
3497                         return -ENXIO;
3498                 usleep_range(1000, 2000);
3499         }
3500
3501         memcpy(response, admin_queues->oq_element_array +
3502                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3503
3504         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3505         admin_queues->oq_ci_copy = oq_ci;
3506         writel(oq_ci, admin_queues->oq_ci);
3507
3508         return 0;
3509 }
3510
3511 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3512         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3513         struct pqi_io_request *io_request)
3514 {
3515         struct pqi_io_request *next;
3516         void *next_element;
3517         pqi_index_t iq_pi;
3518         pqi_index_t iq_ci;
3519         size_t iu_length;
3520         unsigned long flags;
3521         unsigned int num_elements_needed;
3522         unsigned int num_elements_to_end_of_queue;
3523         size_t copy_count;
3524         struct pqi_iu_header *request;
3525
3526         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3527
3528         if (io_request) {
3529                 io_request->queue_group = queue_group;
3530                 list_add_tail(&io_request->request_list_entry,
3531                         &queue_group->request_list[path]);
3532         }
3533
3534         iq_pi = queue_group->iq_pi_copy[path];
3535
3536         list_for_each_entry_safe(io_request, next,
3537                 &queue_group->request_list[path], request_list_entry) {
3538
3539                 request = io_request->iu;
3540
3541                 iu_length = get_unaligned_le16(&request->iu_length) +
3542                         PQI_REQUEST_HEADER_LENGTH;
3543                 num_elements_needed =
3544                         DIV_ROUND_UP(iu_length,
3545                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3546
3547                 iq_ci = *queue_group->iq_ci[path];
3548
3549                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3550                         ctrl_info->num_elements_per_iq))
3551                         break;
3552
3553                 put_unaligned_le16(queue_group->oq_id,
3554                         &request->response_queue_id);
3555
3556                 next_element = queue_group->iq_element_array[path] +
3557                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3558
3559                 num_elements_to_end_of_queue =
3560                         ctrl_info->num_elements_per_iq - iq_pi;
3561
3562                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3563                         memcpy(next_element, request, iu_length);
3564                 } else {
3565                         copy_count = num_elements_to_end_of_queue *
3566                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3567                         memcpy(next_element, request, copy_count);
3568                         memcpy(queue_group->iq_element_array[path],
3569                                 (u8 *)request + copy_count,
3570                                 iu_length - copy_count);
3571                 }
3572
3573                 iq_pi = (iq_pi + num_elements_needed) %
3574                         ctrl_info->num_elements_per_iq;
3575
3576                 list_del(&io_request->request_list_entry);
3577         }
3578
3579         if (iq_pi != queue_group->iq_pi_copy[path]) {
3580                 queue_group->iq_pi_copy[path] = iq_pi;
3581                 /*
3582                  * This write notifies the controller that one or more IUs are
3583                  * available to be processed.
3584                  */
3585                 writel(iq_pi, queue_group->iq_pi[path]);
3586         }
3587
3588         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3589 }
3590
3591 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3592
3593 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3594         struct completion *wait)
3595 {
3596         int rc;
3597
3598         while (1) {
3599                 if (wait_for_completion_io_timeout(wait,
3600                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
3601                         rc = 0;
3602                         break;
3603                 }
3604
3605                 pqi_check_ctrl_health(ctrl_info);
3606                 if (pqi_ctrl_offline(ctrl_info)) {
3607                         rc = -ENXIO;
3608                         break;
3609                 }
3610         }
3611
3612         return rc;
3613 }
3614
3615 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3616         void *context)
3617 {
3618         struct completion *waiting = context;
3619
3620         complete(waiting);
3621 }
3622
3623 static int pqi_submit_raid_request_synchronous_with_io_request(
3624         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3625         unsigned long timeout_msecs)
3626 {
3627         int rc = 0;
3628         DECLARE_COMPLETION_ONSTACK(wait);
3629
3630         io_request->io_complete_callback = pqi_raid_synchronous_complete;
3631         io_request->context = &wait;
3632
3633         pqi_start_io(ctrl_info,
3634                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3635                 io_request);
3636
3637         if (timeout_msecs == NO_TIMEOUT) {
3638                 pqi_wait_for_completion_io(ctrl_info, &wait);
3639         } else {
3640                 if (!wait_for_completion_io_timeout(&wait,
3641                         msecs_to_jiffies(timeout_msecs))) {
3642                         dev_warn(&ctrl_info->pci_dev->dev,
3643                                 "command timed out\n");
3644                         rc = -ETIMEDOUT;
3645                 }
3646         }
3647
3648         return rc;
3649 }
3650
3651 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3652         struct pqi_iu_header *request, unsigned int flags,
3653         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3654 {
3655         int rc;
3656         struct pqi_io_request *io_request;
3657         unsigned long start_jiffies;
3658         unsigned long msecs_blocked;
3659         size_t iu_length;
3660
3661         /*
3662          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3663          * are mutually exclusive.
3664          */
3665
3666         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3667                 if (down_interruptible(&ctrl_info->sync_request_sem))
3668                         return -ERESTARTSYS;
3669         } else {
3670                 if (timeout_msecs == NO_TIMEOUT) {
3671                         down(&ctrl_info->sync_request_sem);
3672                 } else {
3673                         start_jiffies = jiffies;
3674                         if (down_timeout(&ctrl_info->sync_request_sem,
3675                                 msecs_to_jiffies(timeout_msecs)))
3676                                 return -ETIMEDOUT;
3677                         msecs_blocked =
3678                                 jiffies_to_msecs(jiffies - start_jiffies);
3679                         if (msecs_blocked >= timeout_msecs)
3680                                 return -ETIMEDOUT;
3681                         timeout_msecs -= msecs_blocked;
3682                 }
3683         }
3684
3685         pqi_ctrl_busy(ctrl_info);
3686         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
3687         if (timeout_msecs == 0) {
3688                 rc = -ETIMEDOUT;
3689                 goto out;
3690         }
3691
3692         if (pqi_ctrl_offline(ctrl_info)) {
3693                 rc = -ENXIO;
3694                 goto out;
3695         }
3696
3697         io_request = pqi_alloc_io_request(ctrl_info);
3698
3699         put_unaligned_le16(io_request->index,
3700                 &(((struct pqi_raid_path_request *)request)->request_id));
3701
3702         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3703                 ((struct pqi_raid_path_request *)request)->error_index =
3704                         ((struct pqi_raid_path_request *)request)->request_id;
3705
3706         iu_length = get_unaligned_le16(&request->iu_length) +
3707                 PQI_REQUEST_HEADER_LENGTH;
3708         memcpy(io_request->iu, request, iu_length);
3709
3710         rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3711                 io_request, timeout_msecs);
3712
3713         if (error_info) {
3714                 if (io_request->error_info)
3715                         memcpy(error_info, io_request->error_info,
3716                                 sizeof(*error_info));
3717                 else
3718                         memset(error_info, 0, sizeof(*error_info));
3719         } else if (rc == 0 && io_request->error_info) {
3720                 u8 scsi_status;
3721                 struct pqi_raid_error_info *raid_error_info;
3722
3723                 raid_error_info = io_request->error_info;
3724                 scsi_status = raid_error_info->status;
3725
3726                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3727                         raid_error_info->data_out_result ==
3728                         PQI_DATA_IN_OUT_UNDERFLOW)
3729                         scsi_status = SAM_STAT_GOOD;
3730
3731                 if (scsi_status != SAM_STAT_GOOD)
3732                         rc = -EIO;
3733         }
3734
3735         pqi_free_io_request(io_request);
3736
3737 out:
3738         pqi_ctrl_unbusy(ctrl_info);
3739         up(&ctrl_info->sync_request_sem);
3740
3741         return rc;
3742 }
3743
3744 static int pqi_validate_admin_response(
3745         struct pqi_general_admin_response *response, u8 expected_function_code)
3746 {
3747         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3748                 return -EINVAL;
3749
3750         if (get_unaligned_le16(&response->header.iu_length) !=
3751                 PQI_GENERAL_ADMIN_IU_LENGTH)
3752                 return -EINVAL;
3753
3754         if (response->function_code != expected_function_code)
3755                 return -EINVAL;
3756
3757         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3758                 return -EINVAL;
3759
3760         return 0;
3761 }
3762
3763 static int pqi_submit_admin_request_synchronous(
3764         struct pqi_ctrl_info *ctrl_info,
3765         struct pqi_general_admin_request *request,
3766         struct pqi_general_admin_response *response)
3767 {
3768         int rc;
3769
3770         pqi_submit_admin_request(ctrl_info, request);
3771
3772         rc = pqi_poll_for_admin_response(ctrl_info, response);
3773
3774         if (rc == 0)
3775                 rc = pqi_validate_admin_response(response,
3776                         request->function_code);
3777
3778         return rc;
3779 }
3780
3781 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3782 {
3783         int rc;
3784         struct pqi_general_admin_request request;
3785         struct pqi_general_admin_response response;
3786         struct pqi_device_capability *capability;
3787         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3788
3789         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3790         if (!capability)
3791                 return -ENOMEM;
3792
3793         memset(&request, 0, sizeof(request));
3794
3795         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3796         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3797                 &request.header.iu_length);
3798         request.function_code =
3799                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3800         put_unaligned_le32(sizeof(*capability),
3801                 &request.data.report_device_capability.buffer_length);
3802
3803         rc = pqi_map_single(ctrl_info->pci_dev,
3804                 &request.data.report_device_capability.sg_descriptor,
3805                 capability, sizeof(*capability),
3806                 PCI_DMA_FROMDEVICE);
3807         if (rc)
3808                 goto out;
3809
3810         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3811                 &response);
3812
3813         pqi_pci_unmap(ctrl_info->pci_dev,
3814                 &request.data.report_device_capability.sg_descriptor, 1,
3815                 PCI_DMA_FROMDEVICE);
3816
3817         if (rc)
3818                 goto out;
3819
3820         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3821                 rc = -EIO;
3822                 goto out;
3823         }
3824
3825         ctrl_info->max_inbound_queues =
3826                 get_unaligned_le16(&capability->max_inbound_queues);
3827         ctrl_info->max_elements_per_iq =
3828                 get_unaligned_le16(&capability->max_elements_per_iq);
3829         ctrl_info->max_iq_element_length =
3830                 get_unaligned_le16(&capability->max_iq_element_length)
3831                 * 16;
3832         ctrl_info->max_outbound_queues =
3833                 get_unaligned_le16(&capability->max_outbound_queues);
3834         ctrl_info->max_elements_per_oq =
3835                 get_unaligned_le16(&capability->max_elements_per_oq);
3836         ctrl_info->max_oq_element_length =
3837                 get_unaligned_le16(&capability->max_oq_element_length)
3838                 * 16;
3839
3840         sop_iu_layer_descriptor =
3841                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3842
3843         ctrl_info->max_inbound_iu_length_per_firmware =
3844                 get_unaligned_le16(
3845                         &sop_iu_layer_descriptor->max_inbound_iu_length);
3846         ctrl_info->inbound_spanning_supported =
3847                 sop_iu_layer_descriptor->inbound_spanning_supported;
3848         ctrl_info->outbound_spanning_supported =
3849                 sop_iu_layer_descriptor->outbound_spanning_supported;
3850
3851 out:
3852         kfree(capability);
3853
3854         return rc;
3855 }
3856
3857 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3858 {
3859         if (ctrl_info->max_iq_element_length <
3860                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3861                 dev_err(&ctrl_info->pci_dev->dev,
3862                         "max. inbound queue element length of %d is less than the required length of %d\n",
3863                         ctrl_info->max_iq_element_length,
3864                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3865                 return -EINVAL;
3866         }
3867
3868         if (ctrl_info->max_oq_element_length <
3869                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3870                 dev_err(&ctrl_info->pci_dev->dev,
3871                         "max. outbound queue element length of %d is less than the required length of %d\n",
3872                         ctrl_info->max_oq_element_length,
3873                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3874                 return -EINVAL;
3875         }
3876
3877         if (ctrl_info->max_inbound_iu_length_per_firmware <
3878                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3879                 dev_err(&ctrl_info->pci_dev->dev,
3880                         "max. inbound IU length of %u is less than the min. required length of %d\n",
3881                         ctrl_info->max_inbound_iu_length_per_firmware,
3882                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3883                 return -EINVAL;
3884         }
3885
3886         if (!ctrl_info->inbound_spanning_supported) {
3887                 dev_err(&ctrl_info->pci_dev->dev,
3888                         "the controller does not support inbound spanning\n");
3889                 return -EINVAL;
3890         }
3891
3892         if (ctrl_info->outbound_spanning_supported) {
3893                 dev_err(&ctrl_info->pci_dev->dev,
3894                         "the controller supports outbound spanning but this driver does not\n");
3895                 return -EINVAL;
3896         }
3897
3898         return 0;
3899 }
3900
3901 static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
3902         bool inbound_queue, u16 queue_id)
3903 {
3904         struct pqi_general_admin_request request;
3905         struct pqi_general_admin_response response;
3906
3907         memset(&request, 0, sizeof(request));
3908         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3909         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3910                 &request.header.iu_length);
3911         if (inbound_queue)
3912                 request.function_code =
3913                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
3914         else
3915                 request.function_code =
3916                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
3917         put_unaligned_le16(queue_id,
3918                 &request.data.delete_operational_queue.queue_id);
3919
3920         return pqi_submit_admin_request_synchronous(ctrl_info, &request,
3921                 &response);
3922 }
3923
3924 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3925 {
3926         int rc;
3927         struct pqi_event_queue *event_queue;
3928         struct pqi_general_admin_request request;
3929         struct pqi_general_admin_response response;
3930
3931         event_queue = &ctrl_info->event_queue;
3932
3933         /*
3934          * Create OQ (Outbound Queue - device to host queue) to dedicate
3935          * to events.
3936          */
3937         memset(&request, 0, sizeof(request));
3938         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3939         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3940                 &request.header.iu_length);
3941         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3942         put_unaligned_le16(event_queue->oq_id,
3943                 &request.data.create_operational_oq.queue_id);
3944         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3945                 &request.data.create_operational_oq.element_array_addr);
3946         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3947                 &request.data.create_operational_oq.pi_addr);
3948         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3949                 &request.data.create_operational_oq.num_elements);
3950         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3951                 &request.data.create_operational_oq.element_length);
3952         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3953         put_unaligned_le16(event_queue->int_msg_num,
3954                 &request.data.create_operational_oq.int_msg_num);
3955
3956         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3957                 &response);
3958         if (rc)
3959                 return rc;
3960
3961         event_queue->oq_ci = ctrl_info->iomem_base +
3962                 PQI_DEVICE_REGISTERS_OFFSET +
3963                 get_unaligned_le64(
3964                         &response.data.create_operational_oq.oq_ci_offset);
3965
3966         return 0;
3967 }
3968
3969 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
3970         unsigned int group_number)
3971 {
3972         int rc;
3973         struct pqi_queue_group *queue_group;
3974         struct pqi_general_admin_request request;
3975         struct pqi_general_admin_response response;
3976
3977         queue_group = &ctrl_info->queue_groups[group_number];
3978
3979         /*
3980          * Create IQ (Inbound Queue - host to device queue) for
3981          * RAID path.
3982          */
3983         memset(&request, 0, sizeof(request));
3984         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3985         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3986                 &request.header.iu_length);
3987         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3988         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
3989                 &request.data.create_operational_iq.queue_id);
3990         put_unaligned_le64(
3991                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
3992                 &request.data.create_operational_iq.element_array_addr);
3993         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
3994                 &request.data.create_operational_iq.ci_addr);
3995         put_unaligned_le16(ctrl_info->num_elements_per_iq,
3996                 &request.data.create_operational_iq.num_elements);
3997         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
3998                 &request.data.create_operational_iq.element_length);
3999         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4000
4001         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4002                 &response);
4003         if (rc) {
4004                 dev_err(&ctrl_info->pci_dev->dev,
4005                         "error creating inbound RAID queue\n");
4006                 return rc;
4007         }
4008
4009         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4010                 PQI_DEVICE_REGISTERS_OFFSET +
4011                 get_unaligned_le64(
4012                         &response.data.create_operational_iq.iq_pi_offset);
4013
4014         /*
4015          * Create IQ (Inbound Queue - host to device queue) for
4016          * Advanced I/O (AIO) path.
4017          */
4018         memset(&request, 0, sizeof(request));
4019         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4020         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4021                 &request.header.iu_length);
4022         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4023         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4024                 &request.data.create_operational_iq.queue_id);
4025         put_unaligned_le64((u64)queue_group->
4026                 iq_element_array_bus_addr[AIO_PATH],
4027                 &request.data.create_operational_iq.element_array_addr);
4028         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4029                 &request.data.create_operational_iq.ci_addr);
4030         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4031                 &request.data.create_operational_iq.num_elements);
4032         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4033                 &request.data.create_operational_iq.element_length);
4034         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4035
4036         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4037                 &response);
4038         if (rc) {
4039                 dev_err(&ctrl_info->pci_dev->dev,
4040                         "error creating inbound AIO queue\n");
4041                 goto delete_inbound_queue_raid;
4042         }
4043
4044         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4045                 PQI_DEVICE_REGISTERS_OFFSET +
4046                 get_unaligned_le64(
4047                         &response.data.create_operational_iq.iq_pi_offset);
4048
4049         /*
4050          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4051          * assumed to be for RAID path I/O unless we change the queue's
4052          * property.
4053          */
4054         memset(&request, 0, sizeof(request));
4055         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4056         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4057                 &request.header.iu_length);
4058         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4059         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4060                 &request.data.change_operational_iq_properties.queue_id);
4061         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4062                 &request.data.change_operational_iq_properties.vendor_specific);
4063
4064         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4065                 &response);
4066         if (rc) {
4067                 dev_err(&ctrl_info->pci_dev->dev,
4068                         "error changing queue property\n");
4069                 goto delete_inbound_queue_aio;
4070         }
4071
4072         /*
4073          * Create OQ (Outbound Queue - device to host queue).
4074          */
4075         memset(&request, 0, sizeof(request));
4076         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4077         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4078                 &request.header.iu_length);
4079         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4080         put_unaligned_le16(queue_group->oq_id,
4081                 &request.data.create_operational_oq.queue_id);
4082         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4083                 &request.data.create_operational_oq.element_array_addr);
4084         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4085                 &request.data.create_operational_oq.pi_addr);
4086         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4087                 &request.data.create_operational_oq.num_elements);
4088         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4089                 &request.data.create_operational_oq.element_length);
4090         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4091         put_unaligned_le16(queue_group->int_msg_num,
4092                 &request.data.create_operational_oq.int_msg_num);
4093
4094         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4095                 &response);
4096         if (rc) {
4097                 dev_err(&ctrl_info->pci_dev->dev,
4098                         "error creating outbound queue\n");
4099                 goto delete_inbound_queue_aio;
4100         }
4101
4102         queue_group->oq_ci = ctrl_info->iomem_base +
4103                 PQI_DEVICE_REGISTERS_OFFSET +
4104                 get_unaligned_le64(
4105                         &response.data.create_operational_oq.oq_ci_offset);
4106
4107         return 0;
4108
4109 delete_inbound_queue_aio:
4110         pqi_delete_operational_queue(ctrl_info, true,
4111                 queue_group->iq_id[AIO_PATH]);
4112
4113 delete_inbound_queue_raid:
4114         pqi_delete_operational_queue(ctrl_info, true,
4115                 queue_group->iq_id[RAID_PATH]);
4116
4117         return rc;
4118 }
4119
4120 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4121 {
4122         int rc;
4123         unsigned int i;
4124
4125         rc = pqi_create_event_queue(ctrl_info);
4126         if (rc) {
4127                 dev_err(&ctrl_info->pci_dev->dev,
4128                         "error creating event queue\n");
4129                 return rc;
4130         }
4131
4132         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4133                 rc = pqi_create_queue_group(ctrl_info, i);
4134                 if (rc) {
4135                         dev_err(&ctrl_info->pci_dev->dev,
4136                                 "error creating queue group number %u/%u\n",
4137                                 i, ctrl_info->num_queue_groups);
4138                         return rc;
4139                 }
4140         }
4141
4142         return 0;
4143 }
4144
4145 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4146         (offsetof(struct pqi_event_config, descriptors) + \
4147         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4148
4149 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4150         bool enable_events)
4151 {
4152         int rc;
4153         unsigned int i;
4154         struct pqi_event_config *event_config;
4155         struct pqi_event_descriptor *event_descriptor;
4156         struct pqi_general_management_request request;
4157
4158         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4159                 GFP_KERNEL);
4160         if (!event_config)
4161                 return -ENOMEM;
4162
4163         memset(&request, 0, sizeof(request));
4164
4165         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4166         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4167                 data.report_event_configuration.sg_descriptors[1]) -
4168                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4169         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4170                 &request.data.report_event_configuration.buffer_length);
4171
4172         rc = pqi_map_single(ctrl_info->pci_dev,
4173                 request.data.report_event_configuration.sg_descriptors,
4174                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4175                 PCI_DMA_FROMDEVICE);
4176         if (rc)
4177                 goto out;
4178
4179         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4180                 0, NULL, NO_TIMEOUT);
4181
4182         pqi_pci_unmap(ctrl_info->pci_dev,
4183                 request.data.report_event_configuration.sg_descriptors, 1,
4184                 PCI_DMA_FROMDEVICE);
4185
4186         if (rc)
4187                 goto out;
4188
4189         for (i = 0; i < event_config->num_event_descriptors; i++) {
4190                 event_descriptor = &event_config->descriptors[i];
4191                 if (enable_events &&
4192                         pqi_is_supported_event(event_descriptor->event_type))
4193                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4194                                         &event_descriptor->oq_id);
4195                 else
4196                         put_unaligned_le16(0, &event_descriptor->oq_id);
4197         }
4198
4199         memset(&request, 0, sizeof(request));
4200
4201         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4202         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4203                 data.report_event_configuration.sg_descriptors[1]) -
4204                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4205         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4206                 &request.data.report_event_configuration.buffer_length);
4207
4208         rc = pqi_map_single(ctrl_info->pci_dev,
4209                 request.data.report_event_configuration.sg_descriptors,
4210                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4211                 PCI_DMA_TODEVICE);
4212         if (rc)
4213                 goto out;
4214
4215         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4216                 NULL, NO_TIMEOUT);
4217
4218         pqi_pci_unmap(ctrl_info->pci_dev,
4219                 request.data.report_event_configuration.sg_descriptors, 1,
4220                 PCI_DMA_TODEVICE);
4221
4222 out:
4223         kfree(event_config);
4224
4225         return rc;
4226 }
4227
4228 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4229 {
4230         return pqi_configure_events(ctrl_info, true);
4231 }
4232
4233 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4234 {
4235         return pqi_configure_events(ctrl_info, false);
4236 }
4237
4238 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4239 {
4240         unsigned int i;
4241         struct device *dev;
4242         size_t sg_chain_buffer_length;
4243         struct pqi_io_request *io_request;
4244
4245         if (!ctrl_info->io_request_pool)
4246                 return;
4247
4248         dev = &ctrl_info->pci_dev->dev;
4249         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4250         io_request = ctrl_info->io_request_pool;
4251
4252         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4253                 kfree(io_request->iu);
4254                 if (!io_request->sg_chain_buffer)
4255                         break;
4256                 dma_free_coherent(dev, sg_chain_buffer_length,
4257                         io_request->sg_chain_buffer,
4258                         io_request->sg_chain_buffer_dma_handle);
4259                 io_request++;
4260         }
4261
4262         kfree(ctrl_info->io_request_pool);
4263         ctrl_info->io_request_pool = NULL;
4264 }
4265
4266 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4267 {
4268         ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4269                 ctrl_info->error_buffer_length,
4270                 &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4271
4272         if (!ctrl_info->error_buffer)
4273                 return -ENOMEM;
4274
4275         return 0;
4276 }
4277
4278 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4279 {
4280         unsigned int i;
4281         void *sg_chain_buffer;
4282         size_t sg_chain_buffer_length;
4283         dma_addr_t sg_chain_buffer_dma_handle;
4284         struct device *dev;
4285         struct pqi_io_request *io_request;
4286
4287         ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4288                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4289
4290         if (!ctrl_info->io_request_pool) {
4291                 dev_err(&ctrl_info->pci_dev->dev,
4292                         "failed to allocate I/O request pool\n");
4293                 goto error;
4294         }
4295
4296         dev = &ctrl_info->pci_dev->dev;
4297         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4298         io_request = ctrl_info->io_request_pool;
4299
4300         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4301                 io_request->iu =
4302                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4303
4304                 if (!io_request->iu) {
4305                         dev_err(&ctrl_info->pci_dev->dev,
4306                                 "failed to allocate IU buffers\n");
4307                         goto error;
4308                 }
4309
4310                 sg_chain_buffer = dma_alloc_coherent(dev,
4311                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4312                         GFP_KERNEL);
4313
4314                 if (!sg_chain_buffer) {
4315                         dev_err(&ctrl_info->pci_dev->dev,
4316                                 "failed to allocate PQI scatter-gather chain buffers\n");
4317                         goto error;
4318                 }
4319
4320                 io_request->index = i;
4321                 io_request->sg_chain_buffer = sg_chain_buffer;
4322                 io_request->sg_chain_buffer_dma_handle =
4323                         sg_chain_buffer_dma_handle;
4324                 io_request++;
4325         }
4326
4327         return 0;
4328
4329 error:
4330         pqi_free_all_io_requests(ctrl_info);
4331
4332         return -ENOMEM;
4333 }
4334
4335 /*
4336  * Calculate required resources that are sized based on max. outstanding
4337  * requests and max. transfer size.
4338  */
4339
4340 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4341 {
4342         u32 max_transfer_size;
4343         u32 max_sg_entries;
4344
4345         ctrl_info->scsi_ml_can_queue =
4346                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4347         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4348
4349         ctrl_info->error_buffer_length =
4350                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4351
4352         if (reset_devices)
4353                 max_transfer_size = min(ctrl_info->max_transfer_size,
4354                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4355         else
4356                 max_transfer_size = min(ctrl_info->max_transfer_size,
4357                         PQI_MAX_TRANSFER_SIZE);
4358
4359         max_sg_entries = max_transfer_size / PAGE_SIZE;
4360
4361         /* +1 to cover when the buffer is not page-aligned. */
4362         max_sg_entries++;
4363
4364         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4365
4366         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4367
4368         ctrl_info->sg_chain_buffer_length =
4369                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4370                 PQI_EXTRA_SGL_MEMORY;
4371         ctrl_info->sg_tablesize = max_sg_entries;
4372         ctrl_info->max_sectors = max_transfer_size / 512;
4373 }
4374
4375 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4376 {
4377         int num_queue_groups;
4378         u16 num_elements_per_iq;
4379         u16 num_elements_per_oq;
4380
4381         if (reset_devices) {
4382                 num_queue_groups = 1;
4383         } else {
4384                 int num_cpus;
4385                 int max_queue_groups;
4386
4387                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4388                         ctrl_info->max_outbound_queues - 1);
4389                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4390
4391                 num_cpus = num_online_cpus();
4392                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4393                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4394         }
4395
4396         ctrl_info->num_queue_groups = num_queue_groups;
4397         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4398
4399         /*
4400          * Make sure that the max. inbound IU length is an even multiple
4401          * of our inbound element length.
4402          */
4403         ctrl_info->max_inbound_iu_length =
4404                 (ctrl_info->max_inbound_iu_length_per_firmware /
4405                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4406                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4407
4408         num_elements_per_iq =
4409                 (ctrl_info->max_inbound_iu_length /
4410                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4411
4412         /* Add one because one element in each queue is unusable. */
4413         num_elements_per_iq++;
4414
4415         num_elements_per_iq = min(num_elements_per_iq,
4416                 ctrl_info->max_elements_per_iq);
4417
4418         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4419         num_elements_per_oq = min(num_elements_per_oq,
4420                 ctrl_info->max_elements_per_oq);
4421
4422         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4423         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4424
4425         ctrl_info->max_sg_per_iu =
4426                 ((ctrl_info->max_inbound_iu_length -
4427                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4428                 sizeof(struct pqi_sg_descriptor)) +
4429                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4430 }
4431
4432 static inline void pqi_set_sg_descriptor(
4433         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4434 {
4435         u64 address = (u64)sg_dma_address(sg);
4436         unsigned int length = sg_dma_len(sg);
4437
4438         put_unaligned_le64(address, &sg_descriptor->address);
4439         put_unaligned_le32(length, &sg_descriptor->length);
4440         put_unaligned_le32(0, &sg_descriptor->flags);
4441 }
4442
4443 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4444         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4445         struct pqi_io_request *io_request)
4446 {
4447         int i;
4448         u16 iu_length;
4449         int sg_count;
4450         bool chained;
4451         unsigned int num_sg_in_iu;
4452         unsigned int max_sg_per_iu;
4453         struct scatterlist *sg;
4454         struct pqi_sg_descriptor *sg_descriptor;
4455
4456         sg_count = scsi_dma_map(scmd);
4457         if (sg_count < 0)
4458                 return sg_count;
4459
4460         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4461                 PQI_REQUEST_HEADER_LENGTH;
4462
4463         if (sg_count == 0)
4464                 goto out;
4465
4466         sg = scsi_sglist(scmd);
4467         sg_descriptor = request->sg_descriptors;
4468         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4469         chained = false;
4470         num_sg_in_iu = 0;
4471         i = 0;
4472
4473         while (1) {
4474                 pqi_set_sg_descriptor(sg_descriptor, sg);
4475                 if (!chained)
4476                         num_sg_in_iu++;
4477                 i++;
4478                 if (i == sg_count)
4479                         break;
4480                 sg_descriptor++;
4481                 if (i == max_sg_per_iu) {
4482                         put_unaligned_le64(
4483                                 (u64)io_request->sg_chain_buffer_dma_handle,
4484                                 &sg_descriptor->address);
4485                         put_unaligned_le32((sg_count - num_sg_in_iu)
4486                                 * sizeof(*sg_descriptor),
4487                                 &sg_descriptor->length);
4488                         put_unaligned_le32(CISS_SG_CHAIN,
4489                                 &sg_descriptor->flags);
4490                         chained = true;
4491                         num_sg_in_iu++;
4492                         sg_descriptor = io_request->sg_chain_buffer;
4493                 }
4494                 sg = sg_next(sg);
4495         }
4496
4497         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4498         request->partial = chained;
4499         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4500
4501 out:
4502         put_unaligned_le16(iu_length, &request->header.iu_length);
4503
4504         return 0;
4505 }
4506
4507 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4508         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4509         struct pqi_io_request *io_request)
4510 {
4511         int i;
4512         u16 iu_length;
4513         int sg_count;
4514         bool chained;
4515         unsigned int num_sg_in_iu;
4516         unsigned int max_sg_per_iu;
4517         struct scatterlist *sg;
4518         struct pqi_sg_descriptor *sg_descriptor;
4519
4520         sg_count = scsi_dma_map(scmd);
4521         if (sg_count < 0)
4522                 return sg_count;
4523
4524         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4525                 PQI_REQUEST_HEADER_LENGTH;
4526         num_sg_in_iu = 0;
4527
4528         if (sg_count == 0)
4529                 goto out;
4530
4531         sg = scsi_sglist(scmd);
4532         sg_descriptor = request->sg_descriptors;
4533         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4534         chained = false;
4535         i = 0;
4536
4537         while (1) {
4538                 pqi_set_sg_descriptor(sg_descriptor, sg);
4539                 if (!chained)
4540                         num_sg_in_iu++;
4541                 i++;
4542                 if (i == sg_count)
4543                         break;
4544                 sg_descriptor++;
4545                 if (i == max_sg_per_iu) {
4546                         put_unaligned_le64(
4547                                 (u64)io_request->sg_chain_buffer_dma_handle,
4548                                 &sg_descriptor->address);
4549                         put_unaligned_le32((sg_count - num_sg_in_iu)
4550                                 * sizeof(*sg_descriptor),
4551                                 &sg_descriptor->length);
4552                         put_unaligned_le32(CISS_SG_CHAIN,
4553                                 &sg_descriptor->flags);
4554                         chained = true;
4555                         num_sg_in_iu++;
4556                         sg_descriptor = io_request->sg_chain_buffer;
4557                 }
4558                 sg = sg_next(sg);
4559         }
4560
4561         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4562         request->partial = chained;
4563         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4564
4565 out:
4566         put_unaligned_le16(iu_length, &request->header.iu_length);
4567         request->num_sg_descriptors = num_sg_in_iu;
4568
4569         return 0;
4570 }
4571
4572 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4573         void *context)
4574 {
4575         struct scsi_cmnd *scmd;
4576
4577         scmd = io_request->scmd;
4578         pqi_free_io_request(io_request);
4579         scsi_dma_unmap(scmd);
4580         pqi_scsi_done(scmd);
4581 }
4582
4583 static int pqi_raid_submit_scsi_cmd_with_io_request(
4584         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4585         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4586         struct pqi_queue_group *queue_group)
4587 {
4588         int rc;
4589         size_t cdb_length;
4590         struct pqi_raid_path_request *request;
4591
4592         io_request->io_complete_callback = pqi_raid_io_complete;
4593         io_request->scmd = scmd;
4594
4595         request = io_request->iu;
4596         memset(request, 0,
4597                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4598
4599         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4600         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4601         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4602         put_unaligned_le16(io_request->index, &request->request_id);
4603         request->error_index = request->request_id;
4604         memcpy(request->lun_number, device->scsi3addr,
4605                 sizeof(request->lun_number));
4606
4607         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4608         memcpy(request->cdb, scmd->cmnd, cdb_length);
4609
4610         switch (cdb_length) {
4611         case 6:
4612         case 10:
4613         case 12:
4614         case 16:
4615                 /* No bytes in the Additional CDB bytes field */
4616                 request->additional_cdb_bytes_usage =
4617                         SOP_ADDITIONAL_CDB_BYTES_0;
4618                 break;
4619         case 20:
4620                 /* 4 bytes in the Additional cdb field */
4621                 request->additional_cdb_bytes_usage =
4622                         SOP_ADDITIONAL_CDB_BYTES_4;
4623                 break;
4624         case 24:
4625                 /* 8 bytes in the Additional cdb field */
4626                 request->additional_cdb_bytes_usage =
4627                         SOP_ADDITIONAL_CDB_BYTES_8;
4628                 break;
4629         case 28:
4630                 /* 12 bytes in the Additional cdb field */
4631                 request->additional_cdb_bytes_usage =
4632                         SOP_ADDITIONAL_CDB_BYTES_12;
4633                 break;
4634         case 32:
4635         default:
4636                 /* 16 bytes in the Additional cdb field */
4637                 request->additional_cdb_bytes_usage =
4638                         SOP_ADDITIONAL_CDB_BYTES_16;
4639                 break;
4640         }
4641
4642         switch (scmd->sc_data_direction) {
4643         case DMA_TO_DEVICE:
4644                 request->data_direction = SOP_READ_FLAG;
4645                 break;
4646         case DMA_FROM_DEVICE:
4647                 request->data_direction = SOP_WRITE_FLAG;
4648                 break;
4649         case DMA_NONE:
4650                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4651                 break;
4652         case DMA_BIDIRECTIONAL:
4653                 request->data_direction = SOP_BIDIRECTIONAL;
4654                 break;
4655         default:
4656                 dev_err(&ctrl_info->pci_dev->dev,
4657                         "unknown data direction: %d\n",
4658                         scmd->sc_data_direction);
4659                 break;
4660         }
4661
4662         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4663         if (rc) {
4664                 pqi_free_io_request(io_request);
4665                 return SCSI_MLQUEUE_HOST_BUSY;
4666         }
4667
4668         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4669
4670         return 0;
4671 }
4672
4673 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4674         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4675         struct pqi_queue_group *queue_group)
4676 {
4677         struct pqi_io_request *io_request;
4678
4679         io_request = pqi_alloc_io_request(ctrl_info);
4680
4681         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4682                 device, scmd, queue_group);
4683 }
4684
4685 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4686 {
4687         if (!pqi_ctrl_blocked(ctrl_info))
4688                 schedule_work(&ctrl_info->raid_bypass_retry_work);
4689 }
4690
4691 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4692 {
4693         struct scsi_cmnd *scmd;
4694         struct pqi_scsi_dev *device;
4695         struct pqi_ctrl_info *ctrl_info;
4696
4697         if (!io_request->raid_bypass)
4698                 return false;
4699
4700         scmd = io_request->scmd;
4701         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4702                 return false;
4703         if (host_byte(scmd->result) == DID_NO_CONNECT)
4704                 return false;
4705
4706         device = scmd->device->hostdata;
4707         if (pqi_device_offline(device))
4708                 return false;
4709
4710         ctrl_info = shost_to_hba(scmd->device->host);
4711         if (pqi_ctrl_offline(ctrl_info))
4712                 return false;
4713
4714         return true;
4715 }
4716
4717 static inline void pqi_add_to_raid_bypass_retry_list(
4718         struct pqi_ctrl_info *ctrl_info,
4719         struct pqi_io_request *io_request, bool at_head)
4720 {
4721         unsigned long flags;
4722
4723         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4724         if (at_head)
4725                 list_add(&io_request->request_list_entry,
4726                         &ctrl_info->raid_bypass_retry_list);
4727         else
4728                 list_add_tail(&io_request->request_list_entry,
4729                         &ctrl_info->raid_bypass_retry_list);
4730         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4731 }
4732
4733 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4734         void *context)
4735 {
4736         struct scsi_cmnd *scmd;
4737
4738         scmd = io_request->scmd;
4739         pqi_free_io_request(io_request);
4740         pqi_scsi_done(scmd);
4741 }
4742
4743 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4744 {
4745         struct scsi_cmnd *scmd;
4746         struct pqi_ctrl_info *ctrl_info;
4747
4748         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4749         scmd = io_request->scmd;
4750         scmd->result = 0;
4751         ctrl_info = shost_to_hba(scmd->device->host);
4752
4753         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4754         pqi_schedule_bypass_retry(ctrl_info);
4755 }
4756
4757 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4758 {
4759         struct scsi_cmnd *scmd;
4760         struct pqi_scsi_dev *device;
4761         struct pqi_ctrl_info *ctrl_info;
4762         struct pqi_queue_group *queue_group;
4763
4764         scmd = io_request->scmd;
4765         device = scmd->device->hostdata;
4766         if (pqi_device_in_reset(device)) {
4767                 pqi_free_io_request(io_request);
4768                 set_host_byte(scmd, DID_RESET);
4769                 pqi_scsi_done(scmd);
4770                 return 0;
4771         }
4772
4773         ctrl_info = shost_to_hba(scmd->device->host);
4774         queue_group = io_request->queue_group;
4775
4776         pqi_reinit_io_request(io_request);
4777
4778         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4779                 device, scmd, queue_group);
4780 }
4781
4782 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4783         struct pqi_ctrl_info *ctrl_info)
4784 {
4785         unsigned long flags;
4786         struct pqi_io_request *io_request;
4787
4788         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4789         io_request = list_first_entry_or_null(
4790                 &ctrl_info->raid_bypass_retry_list,
4791                 struct pqi_io_request, request_list_entry);
4792         if (io_request)
4793                 list_del(&io_request->request_list_entry);
4794         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4795
4796         return io_request;
4797 }
4798
4799 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4800 {
4801         int rc;
4802         struct pqi_io_request *io_request;
4803
4804         pqi_ctrl_busy(ctrl_info);
4805
4806         while (1) {
4807                 if (pqi_ctrl_blocked(ctrl_info))
4808                         break;
4809                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4810                 if (!io_request)
4811                         break;
4812                 rc = pqi_retry_raid_bypass(io_request);
4813                 if (rc) {
4814                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4815                                 true);
4816                         pqi_schedule_bypass_retry(ctrl_info);
4817                         break;
4818                 }
4819         }
4820
4821         pqi_ctrl_unbusy(ctrl_info);
4822 }
4823
4824 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4825 {
4826         struct pqi_ctrl_info *ctrl_info;
4827
4828         ctrl_info = container_of(work, struct pqi_ctrl_info,
4829                 raid_bypass_retry_work);
4830         pqi_retry_raid_bypass_requests(ctrl_info);
4831 }
4832
4833 static void pqi_clear_all_queued_raid_bypass_retries(
4834         struct pqi_ctrl_info *ctrl_info)
4835 {
4836         unsigned long flags;
4837
4838         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4839         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4840         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4841 }
4842
4843 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4844         void *context)
4845 {
4846         struct scsi_cmnd *scmd;
4847
4848         scmd = io_request->scmd;
4849         scsi_dma_unmap(scmd);
4850         if (io_request->status == -EAGAIN)
4851                 set_host_byte(scmd, DID_IMM_RETRY);
4852         else if (pqi_raid_bypass_retry_needed(io_request)) {
4853                 pqi_queue_raid_bypass_retry(io_request);
4854                 return;
4855         }
4856         pqi_free_io_request(io_request);
4857         pqi_scsi_done(scmd);
4858 }
4859
4860 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4861         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4862         struct pqi_queue_group *queue_group)
4863 {
4864         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4865                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4866 }
4867
4868 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4869         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4870         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4871         struct pqi_encryption_info *encryption_info, bool raid_bypass)
4872 {
4873         int rc;
4874         struct pqi_io_request *io_request;
4875         struct pqi_aio_path_request *request;
4876
4877         io_request = pqi_alloc_io_request(ctrl_info);
4878         io_request->io_complete_callback = pqi_aio_io_complete;
4879         io_request->scmd = scmd;
4880         io_request->raid_bypass = raid_bypass;
4881
4882         request = io_request->iu;
4883         memset(request, 0,
4884                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4885
4886         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4887         put_unaligned_le32(aio_handle, &request->nexus_id);
4888         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4889         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4890         put_unaligned_le16(io_request->index, &request->request_id);
4891         request->error_index = request->request_id;
4892         if (cdb_length > sizeof(request->cdb))
4893                 cdb_length = sizeof(request->cdb);
4894         request->cdb_length = cdb_length;
4895         memcpy(request->cdb, cdb, cdb_length);
4896
4897         switch (scmd->sc_data_direction) {
4898         case DMA_TO_DEVICE:
4899                 request->data_direction = SOP_READ_FLAG;
4900                 break;
4901         case DMA_FROM_DEVICE:
4902                 request->data_direction = SOP_WRITE_FLAG;
4903                 break;
4904         case DMA_NONE:
4905                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4906                 break;
4907         case DMA_BIDIRECTIONAL:
4908                 request->data_direction = SOP_BIDIRECTIONAL;
4909                 break;
4910         default:
4911                 dev_err(&ctrl_info->pci_dev->dev,
4912                         "unknown data direction: %d\n",
4913                         scmd->sc_data_direction);
4914                 break;
4915         }
4916
4917         if (encryption_info) {
4918                 request->encryption_enable = true;
4919                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4920                         &request->data_encryption_key_index);
4921                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4922                         &request->encrypt_tweak_lower);
4923                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4924                         &request->encrypt_tweak_upper);
4925         }
4926
4927         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4928         if (rc) {
4929                 pqi_free_io_request(io_request);
4930                 return SCSI_MLQUEUE_HOST_BUSY;
4931         }
4932
4933         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4934
4935         return 0;
4936 }
4937
4938 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4939         struct scsi_cmnd *scmd)
4940 {
4941         u16 hw_queue;
4942
4943         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4944         if (hw_queue > ctrl_info->max_hw_queue_index)
4945                 hw_queue = 0;
4946
4947         return hw_queue;
4948 }
4949
4950 /*
4951  * This function gets called just before we hand the completed SCSI request
4952  * back to the SML.
4953  */
4954
4955 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4956 {
4957         struct pqi_scsi_dev *device;
4958
4959         device = scmd->device->hostdata;
4960         atomic_dec(&device->scsi_cmds_outstanding);
4961 }
4962
4963 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4964         struct scsi_cmnd *scmd)
4965 {
4966         int rc;
4967         struct pqi_ctrl_info *ctrl_info;
4968         struct pqi_scsi_dev *device;
4969         u16 hw_queue;
4970         struct pqi_queue_group *queue_group;
4971         bool raid_bypassed;
4972
4973         device = scmd->device->hostdata;
4974         ctrl_info = shost_to_hba(shost);
4975
4976         atomic_inc(&device->scsi_cmds_outstanding);
4977
4978         if (pqi_ctrl_offline(ctrl_info)) {
4979                 set_host_byte(scmd, DID_NO_CONNECT);
4980                 pqi_scsi_done(scmd);
4981                 return 0;
4982         }
4983
4984         pqi_ctrl_busy(ctrl_info);
4985         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4986                 rc = SCSI_MLQUEUE_HOST_BUSY;
4987                 goto out;
4988         }
4989
4990         /*
4991          * This is necessary because the SML doesn't zero out this field during
4992          * error recovery.
4993          */
4994         scmd->result = 0;
4995
4996         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
4997         queue_group = &ctrl_info->queue_groups[hw_queue];
4998
4999         if (pqi_is_logical_device(device)) {
5000                 raid_bypassed = false;
5001                 if (device->raid_bypass_enabled &&
5002                                 !blk_rq_is_passthrough(scmd->request)) {
5003                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5004                                 scmd, queue_group);
5005                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5006                                 raid_bypassed = true;
5007                 }
5008                 if (!raid_bypassed)
5009                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5010                                 queue_group);
5011         } else {
5012                 if (device->aio_enabled)
5013                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5014                                 queue_group);
5015                 else
5016                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5017                                 queue_group);
5018         }
5019
5020 out:
5021         pqi_ctrl_unbusy(ctrl_info);
5022         if (rc)
5023                 atomic_dec(&device->scsi_cmds_outstanding);
5024
5025         return rc;
5026 }
5027
5028 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5029         struct pqi_queue_group *queue_group)
5030 {
5031         unsigned int path;
5032         unsigned long flags;
5033         bool list_is_empty;
5034
5035         for (path = 0; path < 2; path++) {
5036                 while (1) {
5037                         spin_lock_irqsave(
5038                                 &queue_group->submit_lock[path], flags);
5039                         list_is_empty =
5040                                 list_empty(&queue_group->request_list[path]);
5041                         spin_unlock_irqrestore(
5042                                 &queue_group->submit_lock[path], flags);
5043                         if (list_is_empty)
5044                                 break;
5045                         pqi_check_ctrl_health(ctrl_info);
5046                         if (pqi_ctrl_offline(ctrl_info))
5047                                 return -ENXIO;
5048                         usleep_range(1000, 2000);
5049                 }
5050         }
5051
5052         return 0;
5053 }
5054
5055 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5056 {
5057         int rc;
5058         unsigned int i;
5059         unsigned int path;
5060         struct pqi_queue_group *queue_group;
5061         pqi_index_t iq_pi;
5062         pqi_index_t iq_ci;
5063
5064         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5065                 queue_group = &ctrl_info->queue_groups[i];
5066
5067                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5068                 if (rc)
5069                         return rc;
5070
5071                 for (path = 0; path < 2; path++) {
5072                         iq_pi = queue_group->iq_pi_copy[path];
5073
5074                         while (1) {
5075                                 iq_ci = *queue_group->iq_ci[path];
5076                                 if (iq_ci == iq_pi)
5077                                         break;
5078                                 pqi_check_ctrl_health(ctrl_info);
5079                                 if (pqi_ctrl_offline(ctrl_info))
5080                                         return -ENXIO;
5081                                 usleep_range(1000, 2000);
5082                         }
5083                 }
5084         }
5085
5086         return 0;
5087 }
5088
5089 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5090         struct pqi_scsi_dev *device)
5091 {
5092         unsigned int i;
5093         unsigned int path;
5094         struct pqi_queue_group *queue_group;
5095         unsigned long flags;
5096         struct pqi_io_request *io_request;
5097         struct pqi_io_request *next;
5098         struct scsi_cmnd *scmd;
5099         struct pqi_scsi_dev *scsi_device;
5100
5101         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5102                 queue_group = &ctrl_info->queue_groups[i];
5103
5104                 for (path = 0; path < 2; path++) {
5105                         spin_lock_irqsave(
5106                                 &queue_group->submit_lock[path], flags);
5107
5108                         list_for_each_entry_safe(io_request, next,
5109                                 &queue_group->request_list[path],
5110                                 request_list_entry) {
5111                                 scmd = io_request->scmd;
5112                                 if (!scmd)
5113                                         continue;
5114
5115                                 scsi_device = scmd->device->hostdata;
5116                                 if (scsi_device != device)
5117                                         continue;
5118
5119                                 list_del(&io_request->request_list_entry);
5120                                 set_host_byte(scmd, DID_RESET);
5121                                 pqi_scsi_done(scmd);
5122                         }
5123
5124                         spin_unlock_irqrestore(
5125                                 &queue_group->submit_lock[path], flags);
5126                 }
5127         }
5128 }
5129
5130 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5131         struct pqi_scsi_dev *device)
5132 {
5133         while (atomic_read(&device->scsi_cmds_outstanding)) {
5134                 pqi_check_ctrl_health(ctrl_info);
5135                 if (pqi_ctrl_offline(ctrl_info))
5136                         return -ENXIO;
5137                 usleep_range(1000, 2000);
5138         }
5139
5140         return 0;
5141 }
5142
5143 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5144 {
5145         bool io_pending;
5146         unsigned long flags;
5147         struct pqi_scsi_dev *device;
5148
5149         while (1) {
5150                 io_pending = false;
5151
5152                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5153                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5154                         scsi_device_list_entry) {
5155                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5156                                 io_pending = true;
5157                                 break;
5158                         }
5159                 }
5160                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5161                                         flags);
5162
5163                 if (!io_pending)
5164                         break;
5165
5166                 pqi_check_ctrl_health(ctrl_info);
5167                 if (pqi_ctrl_offline(ctrl_info))
5168                         return -ENXIO;
5169
5170                 usleep_range(1000, 2000);
5171         }
5172
5173         return 0;
5174 }
5175
5176 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5177         void *context)
5178 {
5179         struct completion *waiting = context;
5180
5181         complete(waiting);
5182 }
5183
5184 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5185
5186 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5187         struct pqi_scsi_dev *device, struct completion *wait)
5188 {
5189         int rc;
5190
5191         while (1) {
5192                 if (wait_for_completion_io_timeout(wait,
5193                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5194                         rc = 0;
5195                         break;
5196                 }
5197
5198                 pqi_check_ctrl_health(ctrl_info);
5199                 if (pqi_ctrl_offline(ctrl_info)) {
5200                         rc = -ENXIO;
5201                         break;
5202                 }
5203         }
5204
5205         return rc;
5206 }
5207
5208 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5209         struct pqi_scsi_dev *device)
5210 {
5211         int rc;
5212         struct pqi_io_request *io_request;
5213         DECLARE_COMPLETION_ONSTACK(wait);
5214         struct pqi_task_management_request *request;
5215
5216         io_request = pqi_alloc_io_request(ctrl_info);
5217         io_request->io_complete_callback = pqi_lun_reset_complete;
5218         io_request->context = &wait;
5219
5220         request = io_request->iu;
5221         memset(request, 0, sizeof(*request));
5222
5223         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5224         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5225                 &request->header.iu_length);
5226         put_unaligned_le16(io_request->index, &request->request_id);
5227         memcpy(request->lun_number, device->scsi3addr,
5228                 sizeof(request->lun_number));
5229         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5230
5231         pqi_start_io(ctrl_info,
5232                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5233                 io_request);
5234
5235         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5236         if (rc == 0)
5237                 rc = io_request->status;
5238
5239         pqi_free_io_request(io_request);
5240
5241         return rc;
5242 }
5243
5244 /* Performs a reset at the LUN level. */
5245
5246 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5247         struct pqi_scsi_dev *device)
5248 {
5249         int rc;
5250
5251         rc = pqi_lun_reset(ctrl_info, device);
5252         if (rc == 0)
5253                 rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5254
5255         return rc == 0 ? SUCCESS : FAILED;
5256 }
5257
5258 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5259 {
5260         int rc;
5261         struct Scsi_Host *shost;
5262         struct pqi_ctrl_info *ctrl_info;
5263         struct pqi_scsi_dev *device;
5264
5265         shost = scmd->device->host;
5266         ctrl_info = shost_to_hba(shost);
5267         device = scmd->device->hostdata;
5268
5269         dev_err(&ctrl_info->pci_dev->dev,
5270                 "resetting scsi %d:%d:%d:%d\n",
5271                 shost->host_no, device->bus, device->target, device->lun);
5272
5273         pqi_check_ctrl_health(ctrl_info);
5274         if (pqi_ctrl_offline(ctrl_info)) {
5275                 rc = FAILED;
5276                 goto out;
5277         }
5278
5279         mutex_lock(&ctrl_info->lun_reset_mutex);
5280
5281         pqi_ctrl_block_requests(ctrl_info);
5282         pqi_ctrl_wait_until_quiesced(ctrl_info);
5283         pqi_fail_io_queued_for_device(ctrl_info, device);
5284         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5285         pqi_device_reset_start(device);
5286         pqi_ctrl_unblock_requests(ctrl_info);
5287
5288         if (rc)
5289                 rc = FAILED;
5290         else
5291                 rc = pqi_device_reset(ctrl_info, device);
5292
5293         pqi_device_reset_done(device);
5294
5295         mutex_unlock(&ctrl_info->lun_reset_mutex);
5296
5297 out:
5298         dev_err(&ctrl_info->pci_dev->dev,
5299                 "reset of scsi %d:%d:%d:%d: %s\n",
5300                 shost->host_no, device->bus, device->target, device->lun,
5301                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5302
5303         return rc;
5304 }
5305
5306 static int pqi_slave_alloc(struct scsi_device *sdev)
5307 {
5308         struct pqi_scsi_dev *device;
5309         unsigned long flags;
5310         struct pqi_ctrl_info *ctrl_info;
5311         struct scsi_target *starget;
5312         struct sas_rphy *rphy;
5313
5314         ctrl_info = shost_to_hba(sdev->host);
5315
5316         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5317
5318         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5319                 starget = scsi_target(sdev);
5320                 rphy = target_to_rphy(starget);
5321                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5322                 if (device) {
5323                         device->target = sdev_id(sdev);
5324                         device->lun = sdev->lun;
5325                         device->target_lun_valid = true;
5326                 }
5327         } else {
5328                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5329                         sdev_id(sdev), sdev->lun);
5330         }
5331
5332         if (device) {
5333                 sdev->hostdata = device;
5334                 device->sdev = sdev;
5335                 if (device->queue_depth) {
5336                         device->advertised_queue_depth = device->queue_depth;
5337                         scsi_change_queue_depth(sdev,
5338                                 device->advertised_queue_depth);
5339                 }
5340         }
5341
5342         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5343
5344         return 0;
5345 }
5346
5347 static int pqi_map_queues(struct Scsi_Host *shost)
5348 {
5349         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5350
5351         return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev);
5352 }
5353
5354 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5355         void __user *arg)
5356 {
5357         struct pci_dev *pci_dev;
5358         u32 subsystem_vendor;
5359         u32 subsystem_device;
5360         cciss_pci_info_struct pciinfo;
5361
5362         if (!arg)
5363                 return -EINVAL;
5364
5365         pci_dev = ctrl_info->pci_dev;
5366
5367         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5368         pciinfo.bus = pci_dev->bus->number;
5369         pciinfo.dev_fn = pci_dev->devfn;
5370         subsystem_vendor = pci_dev->subsystem_vendor;
5371         subsystem_device = pci_dev->subsystem_device;
5372         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5373                 subsystem_vendor;
5374
5375         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5376                 return -EFAULT;
5377
5378         return 0;
5379 }
5380
5381 static int pqi_getdrivver_ioctl(void __user *arg)
5382 {
5383         u32 version;
5384
5385         if (!arg)
5386                 return -EINVAL;
5387
5388         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5389                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5390
5391         if (copy_to_user(arg, &version, sizeof(version)))
5392                 return -EFAULT;
5393
5394         return 0;
5395 }
5396
5397 struct ciss_error_info {
5398         u8      scsi_status;
5399         int     command_status;
5400         size_t  sense_data_length;
5401 };
5402
5403 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5404         struct ciss_error_info *ciss_error_info)
5405 {
5406         int ciss_cmd_status;
5407         size_t sense_data_length;
5408
5409         switch (pqi_error_info->data_out_result) {
5410         case PQI_DATA_IN_OUT_GOOD:
5411                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5412                 break;
5413         case PQI_DATA_IN_OUT_UNDERFLOW:
5414                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5415                 break;
5416         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5417                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5418                 break;
5419         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5420         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5421         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5422         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5423         case PQI_DATA_IN_OUT_ERROR:
5424                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5425                 break;
5426         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5427         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5428         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5429         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5430         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5431         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5432         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5433         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5434         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5435         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5436                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5437                 break;
5438         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5439                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5440                 break;
5441         case PQI_DATA_IN_OUT_ABORTED:
5442                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5443                 break;
5444         case PQI_DATA_IN_OUT_TIMEOUT:
5445                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5446                 break;
5447         default:
5448                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5449                 break;
5450         }
5451
5452         sense_data_length =
5453                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5454         if (sense_data_length == 0)
5455                 sense_data_length =
5456                 get_unaligned_le16(&pqi_error_info->response_data_length);
5457         if (sense_data_length)
5458                 if (sense_data_length > sizeof(pqi_error_info->data))
5459                         sense_data_length = sizeof(pqi_error_info->data);
5460
5461         ciss_error_info->scsi_status = pqi_error_info->status;
5462         ciss_error_info->command_status = ciss_cmd_status;
5463         ciss_error_info->sense_data_length = sense_data_length;
5464 }
5465
5466 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5467 {
5468         int rc;
5469         char *kernel_buffer = NULL;
5470         u16 iu_length;
5471         size_t sense_data_length;
5472         IOCTL_Command_struct iocommand;
5473         struct pqi_raid_path_request request;
5474         struct pqi_raid_error_info pqi_error_info;
5475         struct ciss_error_info ciss_error_info;
5476
5477         if (pqi_ctrl_offline(ctrl_info))
5478                 return -ENXIO;
5479         if (!arg)
5480                 return -EINVAL;
5481         if (!capable(CAP_SYS_RAWIO))
5482                 return -EPERM;
5483         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5484                 return -EFAULT;
5485         if (iocommand.buf_size < 1 &&
5486                 iocommand.Request.Type.Direction != XFER_NONE)
5487                 return -EINVAL;
5488         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5489                 return -EINVAL;
5490         if (iocommand.Request.Type.Type != TYPE_CMD)
5491                 return -EINVAL;
5492
5493         switch (iocommand.Request.Type.Direction) {
5494         case XFER_NONE:
5495         case XFER_WRITE:
5496         case XFER_READ:
5497         case XFER_READ | XFER_WRITE:
5498                 break;
5499         default:
5500                 return -EINVAL;
5501         }
5502
5503         if (iocommand.buf_size > 0) {
5504                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5505                 if (!kernel_buffer)
5506                         return -ENOMEM;
5507                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5508                         if (copy_from_user(kernel_buffer, iocommand.buf,
5509                                 iocommand.buf_size)) {
5510                                 rc = -EFAULT;
5511                                 goto out;
5512                         }
5513                 } else {
5514                         memset(kernel_buffer, 0, iocommand.buf_size);
5515                 }
5516         }
5517
5518         memset(&request, 0, sizeof(request));
5519
5520         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5521         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5522                 PQI_REQUEST_HEADER_LENGTH;
5523         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5524                 sizeof(request.lun_number));
5525         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5526         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5527
5528         switch (iocommand.Request.Type.Direction) {
5529         case XFER_NONE:
5530                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5531                 break;
5532         case XFER_WRITE:
5533                 request.data_direction = SOP_WRITE_FLAG;
5534                 break;
5535         case XFER_READ:
5536                 request.data_direction = SOP_READ_FLAG;
5537                 break;
5538         case XFER_READ | XFER_WRITE:
5539                 request.data_direction = SOP_BIDIRECTIONAL;
5540                 break;
5541         }
5542
5543         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5544
5545         if (iocommand.buf_size > 0) {
5546                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5547
5548                 rc = pqi_map_single(ctrl_info->pci_dev,
5549                         &request.sg_descriptors[0], kernel_buffer,
5550                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5551                 if (rc)
5552                         goto out;
5553
5554                 iu_length += sizeof(request.sg_descriptors[0]);
5555         }
5556
5557         put_unaligned_le16(iu_length, &request.header.iu_length);
5558
5559         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
5560                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
5561
5562         if (iocommand.buf_size > 0)
5563                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
5564                         PCI_DMA_BIDIRECTIONAL);
5565
5566         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
5567
5568         if (rc == 0) {
5569                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
5570                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
5571                 iocommand.error_info.CommandStatus =
5572                         ciss_error_info.command_status;
5573                 sense_data_length = ciss_error_info.sense_data_length;
5574                 if (sense_data_length) {
5575                         if (sense_data_length >
5576                                 sizeof(iocommand.error_info.SenseInfo))
5577                                 sense_data_length =
5578                                         sizeof(iocommand.error_info.SenseInfo);
5579                         memcpy(iocommand.error_info.SenseInfo,
5580                                 pqi_error_info.data, sense_data_length);
5581                         iocommand.error_info.SenseLen = sense_data_length;
5582                 }
5583         }
5584
5585         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
5586                 rc = -EFAULT;
5587                 goto out;
5588         }
5589
5590         if (rc == 0 && iocommand.buf_size > 0 &&
5591                 (iocommand.Request.Type.Direction & XFER_READ)) {
5592                 if (copy_to_user(iocommand.buf, kernel_buffer,
5593                         iocommand.buf_size)) {
5594                         rc = -EFAULT;
5595                 }
5596         }
5597
5598 out:
5599         kfree(kernel_buffer);
5600
5601         return rc;
5602 }
5603
5604 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
5605 {
5606         int rc;
5607         struct pqi_ctrl_info *ctrl_info;
5608
5609         ctrl_info = shost_to_hba(sdev->host);
5610
5611         switch (cmd) {
5612         case CCISS_DEREGDISK:
5613         case CCISS_REGNEWDISK:
5614         case CCISS_REGNEWD:
5615                 rc = pqi_scan_scsi_devices(ctrl_info);
5616                 break;
5617         case CCISS_GETPCIINFO:
5618                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5619                 break;
5620         case CCISS_GETDRIVVER:
5621                 rc = pqi_getdrivver_ioctl(arg);
5622                 break;
5623         case CCISS_PASSTHRU:
5624                 rc = pqi_passthru_ioctl(ctrl_info, arg);
5625                 break;
5626         default:
5627                 rc = -EINVAL;
5628                 break;
5629         }
5630
5631         return rc;
5632 }
5633
5634 static ssize_t pqi_version_show(struct device *dev,
5635         struct device_attribute *attr, char *buffer)
5636 {
5637         ssize_t count = 0;
5638         struct Scsi_Host *shost;
5639         struct pqi_ctrl_info *ctrl_info;
5640
5641         shost = class_to_shost(dev);
5642         ctrl_info = shost_to_hba(shost);
5643
5644         count += snprintf(buffer + count, PAGE_SIZE - count,
5645                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5646
5647         count += snprintf(buffer + count, PAGE_SIZE - count,
5648                 "firmware: %s\n", ctrl_info->firmware_version);
5649
5650         return count;
5651 }
5652
5653 static ssize_t pqi_host_rescan_store(struct device *dev,
5654         struct device_attribute *attr, const char *buffer, size_t count)
5655 {
5656         struct Scsi_Host *shost = class_to_shost(dev);
5657
5658         pqi_scan_start(shost);
5659
5660         return count;
5661 }
5662
5663 static ssize_t pqi_lockup_action_show(struct device *dev,
5664         struct device_attribute *attr, char *buffer)
5665 {
5666         int count = 0;
5667         unsigned int i;
5668
5669         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5670                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
5671                         count += snprintf(buffer + count, PAGE_SIZE - count,
5672                                 "[%s] ", pqi_lockup_actions[i].name);
5673                 else
5674                         count += snprintf(buffer + count, PAGE_SIZE - count,
5675                                 "%s ", pqi_lockup_actions[i].name);
5676         }
5677
5678         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
5679
5680         return count;
5681 }
5682
5683 static ssize_t pqi_lockup_action_store(struct device *dev,
5684         struct device_attribute *attr, const char *buffer, size_t count)
5685 {
5686         unsigned int i;
5687         char *action_name;
5688         char action_name_buffer[32];
5689
5690         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
5691         action_name = strstrip(action_name_buffer);
5692
5693         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5694                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
5695                         pqi_lockup_action = pqi_lockup_actions[i].action;
5696                         return count;
5697                 }
5698         }
5699
5700         return -EINVAL;
5701 }
5702
5703 static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
5704 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
5705 static DEVICE_ATTR(lockup_action, 0644,
5706         pqi_lockup_action_show, pqi_lockup_action_store);
5707
5708 static struct device_attribute *pqi_shost_attrs[] = {
5709         &dev_attr_version,
5710         &dev_attr_rescan,
5711         &dev_attr_lockup_action,
5712         NULL
5713 };
5714
5715 static ssize_t pqi_sas_address_show(struct device *dev,
5716         struct device_attribute *attr, char *buffer)
5717 {
5718         struct pqi_ctrl_info *ctrl_info;
5719         struct scsi_device *sdev;
5720         struct pqi_scsi_dev *device;
5721         unsigned long flags;
5722         u64 sas_address;
5723
5724         sdev = to_scsi_device(dev);
5725         ctrl_info = shost_to_hba(sdev->host);
5726
5727         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5728
5729         device = sdev->hostdata;
5730         if (pqi_is_logical_device(device)) {
5731                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5732                         flags);
5733                 return -ENODEV;
5734         }
5735         sas_address = device->sas_address;
5736
5737         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5738
5739         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5740 }
5741
5742 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5743         struct device_attribute *attr, char *buffer)
5744 {
5745         struct pqi_ctrl_info *ctrl_info;
5746         struct scsi_device *sdev;
5747         struct pqi_scsi_dev *device;
5748         unsigned long flags;
5749
5750         sdev = to_scsi_device(dev);
5751         ctrl_info = shost_to_hba(sdev->host);
5752
5753         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5754
5755         device = sdev->hostdata;
5756         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
5757         buffer[1] = '\n';
5758         buffer[2] = '\0';
5759
5760         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5761
5762         return 2;
5763 }
5764
5765 static ssize_t pqi_raid_level_show(struct device *dev,
5766         struct device_attribute *attr, char *buffer)
5767 {
5768         struct pqi_ctrl_info *ctrl_info;
5769         struct scsi_device *sdev;
5770         struct pqi_scsi_dev *device;
5771         unsigned long flags;
5772         char *raid_level;
5773
5774         sdev = to_scsi_device(dev);
5775         ctrl_info = shost_to_hba(sdev->host);
5776
5777         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5778
5779         device = sdev->hostdata;
5780
5781         if (pqi_is_logical_device(device))
5782                 raid_level = pqi_raid_level_to_string(device->raid_level);
5783         else
5784                 raid_level = "N/A";
5785
5786         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5787
5788         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
5789 }
5790
5791 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
5792 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
5793         pqi_ssd_smart_path_enabled_show, NULL);
5794 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
5795
5796 static struct device_attribute *pqi_sdev_attrs[] = {
5797         &dev_attr_sas_address,
5798         &dev_attr_ssd_smart_path_enabled,
5799         &dev_attr_raid_level,
5800         NULL
5801 };
5802
5803 static struct scsi_host_template pqi_driver_template = {
5804         .module = THIS_MODULE,
5805         .name = DRIVER_NAME_SHORT,
5806         .proc_name = DRIVER_NAME_SHORT,
5807         .queuecommand = pqi_scsi_queue_command,
5808         .scan_start = pqi_scan_start,
5809         .scan_finished = pqi_scan_finished,
5810         .this_id = -1,
5811         .use_clustering = ENABLE_CLUSTERING,
5812         .eh_device_reset_handler = pqi_eh_device_reset_handler,
5813         .ioctl = pqi_ioctl,
5814         .slave_alloc = pqi_slave_alloc,
5815         .map_queues = pqi_map_queues,
5816         .sdev_attrs = pqi_sdev_attrs,
5817         .shost_attrs = pqi_shost_attrs,
5818 };
5819
5820 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5821 {
5822         int rc;
5823         struct Scsi_Host *shost;
5824
5825         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5826         if (!shost) {
5827                 dev_err(&ctrl_info->pci_dev->dev,
5828                         "scsi_host_alloc failed for controller %u\n",
5829                         ctrl_info->ctrl_id);
5830                 return -ENOMEM;
5831         }
5832
5833         shost->io_port = 0;
5834         shost->n_io_port = 0;
5835         shost->this_id = -1;
5836         shost->max_channel = PQI_MAX_BUS;
5837         shost->max_cmd_len = MAX_COMMAND_SIZE;
5838         shost->max_lun = ~0;
5839         shost->max_id = ~0;
5840         shost->max_sectors = ctrl_info->max_sectors;
5841         shost->can_queue = ctrl_info->scsi_ml_can_queue;
5842         shost->cmd_per_lun = shost->can_queue;
5843         shost->sg_tablesize = ctrl_info->sg_tablesize;
5844         shost->transportt = pqi_sas_transport_template;
5845         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
5846         shost->unique_id = shost->irq;
5847         shost->nr_hw_queues = ctrl_info->num_queue_groups;
5848         shost->hostdata[0] = (unsigned long)ctrl_info;
5849
5850         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5851         if (rc) {
5852                 dev_err(&ctrl_info->pci_dev->dev,
5853                         "scsi_add_host failed for controller %u\n",
5854                         ctrl_info->ctrl_id);
5855                 goto free_host;
5856         }
5857
5858         rc = pqi_add_sas_host(shost, ctrl_info);
5859         if (rc) {
5860                 dev_err(&ctrl_info->pci_dev->dev,
5861                         "add SAS host failed for controller %u\n",
5862                         ctrl_info->ctrl_id);
5863                 goto remove_host;
5864         }
5865
5866         ctrl_info->scsi_host = shost;
5867
5868         return 0;
5869
5870 remove_host:
5871         scsi_remove_host(shost);
5872 free_host:
5873         scsi_host_put(shost);
5874
5875         return rc;
5876 }
5877
5878 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5879 {
5880         struct Scsi_Host *shost;
5881
5882         pqi_delete_sas_host(ctrl_info);
5883
5884         shost = ctrl_info->scsi_host;
5885         if (!shost)
5886                 return;
5887
5888         scsi_remove_host(shost);
5889         scsi_host_put(shost);
5890 }
5891
5892 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
5893 {
5894         int rc = 0;
5895         struct pqi_device_registers __iomem *pqi_registers;
5896         unsigned long timeout;
5897         unsigned int timeout_msecs;
5898         union pqi_reset_register reset_reg;
5899
5900         pqi_registers = ctrl_info->pqi_registers;
5901         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
5902         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
5903
5904         while (1) {
5905                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
5906                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
5907                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
5908                         break;
5909                 pqi_check_ctrl_health(ctrl_info);
5910                 if (pqi_ctrl_offline(ctrl_info)) {
5911                         rc = -ENXIO;
5912                         break;
5913                 }
5914                 if (time_after(jiffies, timeout)) {
5915                         rc = -ETIMEDOUT;
5916                         break;
5917                 }
5918         }
5919
5920         return rc;
5921 }
5922
5923 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5924 {
5925         int rc;
5926         union pqi_reset_register reset_reg;
5927
5928         if (ctrl_info->pqi_reset_quiesce_supported) {
5929                 rc = sis_pqi_reset_quiesce(ctrl_info);
5930                 if (rc) {
5931                         dev_err(&ctrl_info->pci_dev->dev,
5932                                 "PQI reset failed during quiesce with error %d\n",
5933                                 rc);
5934                         return rc;
5935                 }
5936         }
5937
5938         reset_reg.all_bits = 0;
5939         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
5940         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
5941
5942         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
5943
5944         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
5945         if (rc)
5946                 dev_err(&ctrl_info->pci_dev->dev,
5947                         "PQI reset failed with error %d\n", rc);
5948
5949         return rc;
5950 }
5951
5952 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5953 {
5954         int rc;
5955         struct bmic_identify_controller *identify;
5956
5957         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5958         if (!identify)
5959                 return -ENOMEM;
5960
5961         rc = pqi_identify_controller(ctrl_info, identify);
5962         if (rc)
5963                 goto out;
5964
5965         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5966                 sizeof(identify->firmware_version));
5967         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5968         snprintf(ctrl_info->firmware_version +
5969                 strlen(ctrl_info->firmware_version),
5970                 sizeof(ctrl_info->firmware_version),
5971                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5972
5973 out:
5974         kfree(identify);
5975
5976         return rc;
5977 }
5978
5979 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5980 {
5981         u32 table_length;
5982         u32 section_offset;
5983         void __iomem *table_iomem_addr;
5984         struct pqi_config_table *config_table;
5985         struct pqi_config_table_section_header *section;
5986
5987         table_length = ctrl_info->config_table_length;
5988
5989         config_table = kmalloc(table_length, GFP_KERNEL);
5990         if (!config_table) {
5991                 dev_err(&ctrl_info->pci_dev->dev,
5992                         "failed to allocate memory for PQI configuration table\n");
5993                 return -ENOMEM;
5994         }
5995
5996         /*
5997          * Copy the config table contents from I/O memory space into the
5998          * temporary buffer.
5999          */
6000         table_iomem_addr = ctrl_info->iomem_base +
6001                 ctrl_info->config_table_offset;
6002         memcpy_fromio(config_table, table_iomem_addr, table_length);
6003
6004         section_offset =
6005                 get_unaligned_le32(&config_table->first_section_offset);
6006
6007         while (section_offset) {
6008                 section = (void *)config_table + section_offset;
6009
6010                 switch (get_unaligned_le16(&section->section_id)) {
6011                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
6012                         if (pqi_disable_heartbeat)
6013                                 dev_warn(&ctrl_info->pci_dev->dev,
6014                                 "heartbeat disabled by module parameter\n");
6015                         else
6016                                 ctrl_info->heartbeat_counter =
6017                                         table_iomem_addr +
6018                                         section_offset +
6019                                         offsetof(
6020                                         struct pqi_config_table_heartbeat,
6021                                                 heartbeat_counter);
6022                         break;
6023                 }
6024
6025                 section_offset =
6026                         get_unaligned_le16(&section->next_section_offset);
6027         }
6028
6029         kfree(config_table);
6030
6031         return 0;
6032 }
6033
6034 /* Switches the controller from PQI mode back into SIS mode. */
6035
6036 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6037 {
6038         int rc;
6039
6040         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6041         rc = pqi_reset(ctrl_info);
6042         if (rc)
6043                 return rc;
6044         rc = sis_reenable_sis_mode(ctrl_info);
6045         if (rc) {
6046                 dev_err(&ctrl_info->pci_dev->dev,
6047                         "re-enabling SIS mode failed with error %d\n", rc);
6048                 return rc;
6049         }
6050         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6051
6052         return 0;
6053 }
6054
6055 /*
6056  * If the controller isn't already in SIS mode, this function forces it into
6057  * SIS mode.
6058  */
6059
6060 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6061 {
6062         if (!sis_is_firmware_running(ctrl_info))
6063                 return -ENXIO;
6064
6065         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6066                 return 0;
6067
6068         if (sis_is_kernel_up(ctrl_info)) {
6069                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6070                 return 0;
6071         }
6072
6073         return pqi_revert_to_sis_mode(ctrl_info);
6074 }
6075
6076 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6077 {
6078         int rc;
6079
6080         rc = pqi_force_sis_mode(ctrl_info);
6081         if (rc)
6082                 return rc;
6083
6084         /*
6085          * Wait until the controller is ready to start accepting SIS
6086          * commands.
6087          */
6088         rc = sis_wait_for_ctrl_ready(ctrl_info);
6089         if (rc)
6090                 return rc;
6091
6092         /*
6093          * Get the controller properties.  This allows us to determine
6094          * whether or not it supports PQI mode.
6095          */
6096         rc = sis_get_ctrl_properties(ctrl_info);
6097         if (rc) {
6098                 dev_err(&ctrl_info->pci_dev->dev,
6099                         "error obtaining controller properties\n");
6100                 return rc;
6101         }
6102
6103         rc = sis_get_pqi_capabilities(ctrl_info);
6104         if (rc) {
6105                 dev_err(&ctrl_info->pci_dev->dev,
6106                         "error obtaining controller capabilities\n");
6107                 return rc;
6108         }
6109
6110         if (reset_devices) {
6111                 if (ctrl_info->max_outstanding_requests >
6112                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6113                         ctrl_info->max_outstanding_requests =
6114                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6115         } else {
6116                 if (ctrl_info->max_outstanding_requests >
6117                         PQI_MAX_OUTSTANDING_REQUESTS)
6118                         ctrl_info->max_outstanding_requests =
6119                                         PQI_MAX_OUTSTANDING_REQUESTS;
6120         }
6121
6122         pqi_calculate_io_resources(ctrl_info);
6123
6124         rc = pqi_alloc_error_buffer(ctrl_info);
6125         if (rc) {
6126                 dev_err(&ctrl_info->pci_dev->dev,
6127                         "failed to allocate PQI error buffer\n");
6128                 return rc;
6129         }
6130
6131         /*
6132          * If the function we are about to call succeeds, the
6133          * controller will transition from legacy SIS mode
6134          * into PQI mode.
6135          */
6136         rc = sis_init_base_struct_addr(ctrl_info);
6137         if (rc) {
6138                 dev_err(&ctrl_info->pci_dev->dev,
6139                         "error initializing PQI mode\n");
6140                 return rc;
6141         }
6142
6143         /* Wait for the controller to complete the SIS -> PQI transition. */
6144         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6145         if (rc) {
6146                 dev_err(&ctrl_info->pci_dev->dev,
6147                         "transition to PQI mode failed\n");
6148                 return rc;
6149         }
6150
6151         /* From here on, we are running in PQI mode. */
6152         ctrl_info->pqi_mode_enabled = true;
6153         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6154
6155         rc = pqi_process_config_table(ctrl_info);
6156         if (rc)
6157                 return rc;
6158
6159         rc = pqi_alloc_admin_queues(ctrl_info);
6160         if (rc) {
6161                 dev_err(&ctrl_info->pci_dev->dev,
6162                         "failed to allocate admin queues\n");
6163                 return rc;
6164         }
6165
6166         rc = pqi_create_admin_queues(ctrl_info);
6167         if (rc) {
6168                 dev_err(&ctrl_info->pci_dev->dev,
6169                         "error creating admin queues\n");
6170                 return rc;
6171         }
6172
6173         rc = pqi_report_device_capability(ctrl_info);
6174         if (rc) {
6175                 dev_err(&ctrl_info->pci_dev->dev,
6176                         "obtaining device capability failed\n");
6177                 return rc;
6178         }
6179
6180         rc = pqi_validate_device_capability(ctrl_info);
6181         if (rc)
6182                 return rc;
6183
6184         pqi_calculate_queue_resources(ctrl_info);
6185
6186         rc = pqi_enable_msix_interrupts(ctrl_info);
6187         if (rc)
6188                 return rc;
6189
6190         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6191                 ctrl_info->max_msix_vectors =
6192                         ctrl_info->num_msix_vectors_enabled;
6193                 pqi_calculate_queue_resources(ctrl_info);
6194         }
6195
6196         rc = pqi_alloc_io_resources(ctrl_info);
6197         if (rc)
6198                 return rc;
6199
6200         rc = pqi_alloc_operational_queues(ctrl_info);
6201         if (rc) {
6202                 dev_err(&ctrl_info->pci_dev->dev,
6203                         "failed to allocate operational queues\n");
6204                 return rc;
6205         }
6206
6207         pqi_init_operational_queues(ctrl_info);
6208
6209         rc = pqi_request_irqs(ctrl_info);
6210         if (rc)
6211                 return rc;
6212
6213         rc = pqi_create_queues(ctrl_info);
6214         if (rc)
6215                 return rc;
6216
6217         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6218
6219         ctrl_info->controller_online = true;
6220         pqi_start_heartbeat_timer(ctrl_info);
6221
6222         rc = pqi_enable_events(ctrl_info);
6223         if (rc) {
6224                 dev_err(&ctrl_info->pci_dev->dev,
6225                         "error enabling events\n");
6226                 return rc;
6227         }
6228
6229         /* Register with the SCSI subsystem. */
6230         rc = pqi_register_scsi(ctrl_info);
6231         if (rc)
6232                 return rc;
6233
6234         rc = pqi_get_ctrl_firmware_version(ctrl_info);
6235         if (rc) {
6236                 dev_err(&ctrl_info->pci_dev->dev,
6237                         "error obtaining firmware version\n");
6238                 return rc;
6239         }
6240
6241         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6242         if (rc) {
6243                 dev_err(&ctrl_info->pci_dev->dev,
6244                         "error updating host wellness\n");
6245                 return rc;
6246         }
6247
6248         pqi_schedule_update_time_worker(ctrl_info);
6249
6250         pqi_scan_scsi_devices(ctrl_info);
6251
6252         return 0;
6253 }
6254
6255 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6256 {
6257         unsigned int i;
6258         struct pqi_admin_queues *admin_queues;
6259         struct pqi_event_queue *event_queue;
6260
6261         admin_queues = &ctrl_info->admin_queues;
6262         admin_queues->iq_pi_copy = 0;
6263         admin_queues->oq_ci_copy = 0;
6264         *admin_queues->oq_pi = 0;
6265
6266         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6267                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6268                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6269                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
6270
6271                 *ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6272                 *ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6273                 *ctrl_info->queue_groups[i].oq_pi = 0;
6274         }
6275
6276         event_queue = &ctrl_info->event_queue;
6277         *event_queue->oq_pi = 0;
6278         event_queue->oq_ci_copy = 0;
6279 }
6280
6281 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6282 {
6283         int rc;
6284
6285         rc = pqi_force_sis_mode(ctrl_info);
6286         if (rc)
6287                 return rc;
6288
6289         /*
6290          * Wait until the controller is ready to start accepting SIS
6291          * commands.
6292          */
6293         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6294         if (rc)
6295                 return rc;
6296
6297         /*
6298          * If the function we are about to call succeeds, the
6299          * controller will transition from legacy SIS mode
6300          * into PQI mode.
6301          */
6302         rc = sis_init_base_struct_addr(ctrl_info);
6303         if (rc) {
6304                 dev_err(&ctrl_info->pci_dev->dev,
6305                         "error initializing PQI mode\n");
6306                 return rc;
6307         }
6308
6309         /* Wait for the controller to complete the SIS -> PQI transition. */
6310         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6311         if (rc) {
6312                 dev_err(&ctrl_info->pci_dev->dev,
6313                         "transition to PQI mode failed\n");
6314                 return rc;
6315         }
6316
6317         /* From here on, we are running in PQI mode. */
6318         ctrl_info->pqi_mode_enabled = true;
6319         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6320
6321         pqi_reinit_queues(ctrl_info);
6322
6323         rc = pqi_create_admin_queues(ctrl_info);
6324         if (rc) {
6325                 dev_err(&ctrl_info->pci_dev->dev,
6326                         "error creating admin queues\n");
6327                 return rc;
6328         }
6329
6330         rc = pqi_create_queues(ctrl_info);
6331         if (rc)
6332                 return rc;
6333
6334         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6335
6336         ctrl_info->controller_online = true;
6337         pqi_start_heartbeat_timer(ctrl_info);
6338         pqi_ctrl_unblock_requests(ctrl_info);
6339
6340         rc = pqi_enable_events(ctrl_info);
6341         if (rc) {
6342                 dev_err(&ctrl_info->pci_dev->dev,
6343                         "error enabling events\n");
6344                 return rc;
6345         }
6346
6347         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6348         if (rc) {
6349                 dev_err(&ctrl_info->pci_dev->dev,
6350                         "error updating host wellness\n");
6351                 return rc;
6352         }
6353
6354         pqi_schedule_update_time_worker(ctrl_info);
6355
6356         pqi_scan_scsi_devices(ctrl_info);
6357
6358         return 0;
6359 }
6360
6361 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6362         u16 timeout)
6363 {
6364         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6365                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6366 }
6367
6368 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6369 {
6370         int rc;
6371         u64 mask;
6372
6373         rc = pci_enable_device(ctrl_info->pci_dev);
6374         if (rc) {
6375                 dev_err(&ctrl_info->pci_dev->dev,
6376                         "failed to enable PCI device\n");
6377                 return rc;
6378         }
6379
6380         if (sizeof(dma_addr_t) > 4)
6381                 mask = DMA_BIT_MASK(64);
6382         else
6383                 mask = DMA_BIT_MASK(32);
6384
6385         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
6386         if (rc) {
6387                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6388                 goto disable_device;
6389         }
6390
6391         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6392         if (rc) {
6393                 dev_err(&ctrl_info->pci_dev->dev,
6394                         "failed to obtain PCI resources\n");
6395                 goto disable_device;
6396         }
6397
6398         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6399                 ctrl_info->pci_dev, 0),
6400                 sizeof(struct pqi_ctrl_registers));
6401         if (!ctrl_info->iomem_base) {
6402                 dev_err(&ctrl_info->pci_dev->dev,
6403                         "failed to map memory for controller registers\n");
6404                 rc = -ENOMEM;
6405                 goto release_regions;
6406         }
6407
6408 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
6409
6410         /* Increase the PCIe completion timeout. */
6411         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6412                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6413         if (rc) {
6414                 dev_err(&ctrl_info->pci_dev->dev,
6415                         "failed to set PCIe completion timeout\n");
6416                 goto release_regions;
6417         }
6418
6419         /* Enable bus mastering. */
6420         pci_set_master(ctrl_info->pci_dev);
6421
6422         ctrl_info->registers = ctrl_info->iomem_base;
6423         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6424
6425         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6426
6427         return 0;
6428
6429 release_regions:
6430         pci_release_regions(ctrl_info->pci_dev);
6431 disable_device:
6432         pci_disable_device(ctrl_info->pci_dev);
6433
6434         return rc;
6435 }
6436
6437 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6438 {
6439         iounmap(ctrl_info->iomem_base);
6440         pci_release_regions(ctrl_info->pci_dev);
6441         if (pci_is_enabled(ctrl_info->pci_dev))
6442                 pci_disable_device(ctrl_info->pci_dev);
6443         pci_set_drvdata(ctrl_info->pci_dev, NULL);
6444 }
6445
6446 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6447 {
6448         struct pqi_ctrl_info *ctrl_info;
6449
6450         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6451                         GFP_KERNEL, numa_node);
6452         if (!ctrl_info)
6453                 return NULL;
6454
6455         mutex_init(&ctrl_info->scan_mutex);
6456         mutex_init(&ctrl_info->lun_reset_mutex);
6457
6458         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6459         spin_lock_init(&ctrl_info->scsi_device_list_lock);
6460
6461         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6462         atomic_set(&ctrl_info->num_interrupts, 0);
6463
6464         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6465         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6466
6467         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
6468         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6469
6470         sema_init(&ctrl_info->sync_request_sem,
6471                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6472         init_waitqueue_head(&ctrl_info->block_requests_wait);
6473
6474         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6475         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6476         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6477                 pqi_raid_bypass_retry_worker);
6478
6479         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6480         ctrl_info->irq_mode = IRQ_MODE_NONE;
6481         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6482
6483         return ctrl_info;
6484 }
6485
6486 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6487 {
6488         kfree(ctrl_info);
6489 }
6490
6491 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6492 {
6493         pqi_free_irqs(ctrl_info);
6494         pqi_disable_msix_interrupts(ctrl_info);
6495 }
6496
6497 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6498 {
6499         pqi_stop_heartbeat_timer(ctrl_info);
6500         pqi_free_interrupts(ctrl_info);
6501         if (ctrl_info->queue_memory_base)
6502                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6503                         ctrl_info->queue_memory_length,
6504                         ctrl_info->queue_memory_base,
6505                         ctrl_info->queue_memory_base_dma_handle);
6506         if (ctrl_info->admin_queue_memory_base)
6507                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6508                         ctrl_info->admin_queue_memory_length,
6509                         ctrl_info->admin_queue_memory_base,
6510                         ctrl_info->admin_queue_memory_base_dma_handle);
6511         pqi_free_all_io_requests(ctrl_info);
6512         if (ctrl_info->error_buffer)
6513                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6514                         ctrl_info->error_buffer_length,
6515                         ctrl_info->error_buffer,
6516                         ctrl_info->error_buffer_dma_handle);
6517         if (ctrl_info->iomem_base)
6518                 pqi_cleanup_pci_init(ctrl_info);
6519         pqi_free_ctrl_info(ctrl_info);
6520 }
6521
6522 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6523 {
6524         pqi_cancel_rescan_worker(ctrl_info);
6525         pqi_cancel_update_time_worker(ctrl_info);
6526         pqi_remove_all_scsi_devices(ctrl_info);
6527         pqi_unregister_scsi(ctrl_info);
6528         if (ctrl_info->pqi_mode_enabled)
6529                 pqi_revert_to_sis_mode(ctrl_info);
6530         pqi_free_ctrl_resources(ctrl_info);
6531 }
6532
6533 static void pqi_perform_lockup_action(void)
6534 {
6535         switch (pqi_lockup_action) {
6536         case PANIC:
6537                 panic("FATAL: Smart Family Controller lockup detected");
6538                 break;
6539         case REBOOT:
6540                 emergency_restart();
6541                 break;
6542         case NONE:
6543         default:
6544                 break;
6545         }
6546 }
6547
6548 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6549         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6550         .status = SAM_STAT_CHECK_CONDITION,
6551 };
6552
6553 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6554 {
6555         unsigned int i;
6556         struct pqi_io_request *io_request;
6557         struct scsi_cmnd *scmd;
6558
6559         for (i = 0; i < ctrl_info->max_io_slots; i++) {
6560                 io_request = &ctrl_info->io_request_pool[i];
6561                 if (atomic_read(&io_request->refcount) == 0)
6562                         continue;
6563
6564                 scmd = io_request->scmd;
6565                 if (scmd) {
6566                         set_host_byte(scmd, DID_NO_CONNECT);
6567                 } else {
6568                         io_request->status = -ENXIO;
6569                         io_request->error_info =
6570                                 &pqi_ctrl_offline_raid_error_info;
6571                 }
6572
6573                 io_request->io_complete_callback(io_request,
6574                         io_request->context);
6575         }
6576 }
6577
6578 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6579 {
6580         pqi_perform_lockup_action();
6581         pqi_stop_heartbeat_timer(ctrl_info);
6582         pqi_free_interrupts(ctrl_info);
6583         pqi_cancel_rescan_worker(ctrl_info);
6584         pqi_cancel_update_time_worker(ctrl_info);
6585         pqi_ctrl_wait_until_quiesced(ctrl_info);
6586         pqi_fail_all_outstanding_requests(ctrl_info);
6587         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6588         pqi_ctrl_unblock_requests(ctrl_info);
6589 }
6590
6591 static void pqi_ctrl_offline_worker(struct work_struct *work)
6592 {
6593         struct pqi_ctrl_info *ctrl_info;
6594
6595         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6596         pqi_take_ctrl_offline_deferred(ctrl_info);
6597 }
6598
6599 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6600 {
6601         if (!ctrl_info->controller_online)
6602                 return;
6603
6604         ctrl_info->controller_online = false;
6605         ctrl_info->pqi_mode_enabled = false;
6606         pqi_ctrl_block_requests(ctrl_info);
6607         if (!pqi_disable_ctrl_shutdown)
6608                 sis_shutdown_ctrl(ctrl_info);
6609         pci_disable_device(ctrl_info->pci_dev);
6610         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6611         schedule_work(&ctrl_info->ctrl_offline_work);
6612 }
6613
6614 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6615         const struct pci_device_id *id)
6616 {
6617         char *ctrl_description;
6618
6619         if (id->driver_data)
6620                 ctrl_description = (char *)id->driver_data;
6621         else
6622                 ctrl_description = "Microsemi Smart Family Controller";
6623
6624         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6625 }
6626
6627 static int pqi_pci_probe(struct pci_dev *pci_dev,
6628         const struct pci_device_id *id)
6629 {
6630         int rc;
6631         int node;
6632         struct pqi_ctrl_info *ctrl_info;
6633
6634         pqi_print_ctrl_info(pci_dev, id);
6635
6636         if (pqi_disable_device_id_wildcards &&
6637                 id->subvendor == PCI_ANY_ID &&
6638                 id->subdevice == PCI_ANY_ID) {
6639                 dev_warn(&pci_dev->dev,
6640                         "controller not probed because device ID wildcards are disabled\n");
6641                 return -ENODEV;
6642         }
6643
6644         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6645                 dev_warn(&pci_dev->dev,
6646                         "controller device ID matched using wildcards\n");
6647
6648         node = dev_to_node(&pci_dev->dev);
6649         if (node == NUMA_NO_NODE)
6650                 set_dev_node(&pci_dev->dev, 0);
6651
6652         ctrl_info = pqi_alloc_ctrl_info(node);
6653         if (!ctrl_info) {
6654                 dev_err(&pci_dev->dev,
6655                         "failed to allocate controller info block\n");
6656                 return -ENOMEM;
6657         }
6658
6659         ctrl_info->pci_dev = pci_dev;
6660
6661         rc = pqi_pci_init(ctrl_info);
6662         if (rc)
6663                 goto error;
6664
6665         rc = pqi_ctrl_init(ctrl_info);
6666         if (rc)
6667                 goto error;
6668
6669         return 0;
6670
6671 error:
6672         pqi_remove_ctrl(ctrl_info);
6673
6674         return rc;
6675 }
6676
6677 static void pqi_pci_remove(struct pci_dev *pci_dev)
6678 {
6679         struct pqi_ctrl_info *ctrl_info;
6680
6681         ctrl_info = pci_get_drvdata(pci_dev);
6682         if (!ctrl_info)
6683                 return;
6684
6685         pqi_remove_ctrl(ctrl_info);
6686 }
6687
6688 static void pqi_shutdown(struct pci_dev *pci_dev)
6689 {
6690         int rc;
6691         struct pqi_ctrl_info *ctrl_info;
6692
6693         ctrl_info = pci_get_drvdata(pci_dev);
6694         if (!ctrl_info)
6695                 goto error;
6696
6697         /*
6698          * Write all data in the controller's battery-backed cache to
6699          * storage.
6700          */
6701         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
6702         pqi_reset(ctrl_info);
6703         if (rc == 0)
6704                 return;
6705
6706 error:
6707         dev_warn(&pci_dev->dev,
6708                 "unable to flush controller cache\n");
6709 }
6710
6711 static void pqi_process_lockup_action_param(void)
6712 {
6713         unsigned int i;
6714
6715         if (!pqi_lockup_action_param)
6716                 return;
6717
6718         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6719                 if (strcmp(pqi_lockup_action_param,
6720                         pqi_lockup_actions[i].name) == 0) {
6721                         pqi_lockup_action = pqi_lockup_actions[i].action;
6722                         return;
6723                 }
6724         }
6725
6726         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6727                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
6728 }
6729
6730 static void pqi_process_module_params(void)
6731 {
6732         pqi_process_lockup_action_param();
6733 }
6734
6735 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6736 {
6737         struct pqi_ctrl_info *ctrl_info;
6738
6739         ctrl_info = pci_get_drvdata(pci_dev);
6740
6741         pqi_disable_events(ctrl_info);
6742         pqi_cancel_update_time_worker(ctrl_info);
6743         pqi_cancel_rescan_worker(ctrl_info);
6744         pqi_wait_until_scan_finished(ctrl_info);
6745         pqi_wait_until_lun_reset_finished(ctrl_info);
6746         pqi_flush_cache(ctrl_info, SUSPEND);
6747         pqi_ctrl_block_requests(ctrl_info);
6748         pqi_ctrl_wait_until_quiesced(ctrl_info);
6749         pqi_wait_until_inbound_queues_empty(ctrl_info);
6750         pqi_ctrl_wait_for_pending_io(ctrl_info);
6751         pqi_stop_heartbeat_timer(ctrl_info);
6752
6753         if (state.event == PM_EVENT_FREEZE)
6754                 return 0;
6755
6756         pci_save_state(pci_dev);
6757         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6758
6759         ctrl_info->controller_online = false;
6760         ctrl_info->pqi_mode_enabled = false;
6761
6762         return 0;
6763 }
6764
6765 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6766 {
6767         int rc;
6768         struct pqi_ctrl_info *ctrl_info;
6769
6770         ctrl_info = pci_get_drvdata(pci_dev);
6771
6772         if (pci_dev->current_state != PCI_D0) {
6773                 ctrl_info->max_hw_queue_index = 0;
6774                 pqi_free_interrupts(ctrl_info);
6775                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6776                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6777                         IRQF_SHARED, DRIVER_NAME_SHORT,
6778                         &ctrl_info->queue_groups[0]);
6779                 if (rc) {
6780                         dev_err(&ctrl_info->pci_dev->dev,
6781                                 "irq %u init failed with error %d\n",
6782                                 pci_dev->irq, rc);
6783                         return rc;
6784                 }
6785                 pqi_start_heartbeat_timer(ctrl_info);
6786                 pqi_ctrl_unblock_requests(ctrl_info);
6787                 return 0;
6788         }
6789
6790         pci_set_power_state(pci_dev, PCI_D0);
6791         pci_restore_state(pci_dev);
6792
6793         return pqi_ctrl_init_resume(ctrl_info);
6794 }
6795
6796 /* Define the PCI IDs for the controllers that we support. */
6797 static const struct pci_device_id pqi_pci_id_table[] = {
6798         {
6799                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6800                                0x152d, 0x8a22)
6801         },
6802         {
6803                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6804                                0x152d, 0x8a23)
6805         },
6806         {
6807                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6808                                0x152d, 0x8a24)
6809         },
6810         {
6811                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6812                                0x152d, 0x8a36)
6813         },
6814         {
6815                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6816                                0x152d, 0x8a37)
6817         },
6818         {
6819                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6820                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6821         },
6822         {
6823                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6824                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
6825         },
6826         {
6827                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6828                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6829         },
6830         {
6831                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6832                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6833         },
6834         {
6835                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6836                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6837         },
6838         {
6839                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6840                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6841         },
6842         {
6843                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6844                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6845         },
6846         {
6847                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6848                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6849         },
6850         {
6851                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6852                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6853         },
6854         {
6855                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6856                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
6857         },
6858         {
6859                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6860                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6861         },
6862         {
6863                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6864                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6865         },
6866         {
6867                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6868                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6869         },
6870         {
6871                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6872                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6873         },
6874         {
6875                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6876                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6877         },
6878         {
6879                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6880                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6881         },
6882         {
6883                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6884                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6885         },
6886         {
6887                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6888                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6889         },
6890         {
6891                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6892                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6893         },
6894         {
6895                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6896                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
6897         },
6898         {
6899                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6900                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6901         },
6902         {
6903                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6904                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6905         },
6906         {
6907                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6908                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6909         },
6910         {
6911                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6912                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6913         },
6914         {
6915                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6916                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6917         },
6918         {
6919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6920                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6921         },
6922         {
6923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6924                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6925         },
6926         {
6927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6928                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
6929         },
6930         {
6931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6932                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
6933         },
6934         {
6935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6936                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6937         },
6938         {
6939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6940                                PCI_VENDOR_ID_DELL, 0x1fe0)
6941         },
6942         {
6943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6944                                PCI_VENDOR_ID_HP, 0x0600)
6945         },
6946         {
6947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6948                                PCI_VENDOR_ID_HP, 0x0601)
6949         },
6950         {
6951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6952                                PCI_VENDOR_ID_HP, 0x0602)
6953         },
6954         {
6955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6956                                PCI_VENDOR_ID_HP, 0x0603)
6957         },
6958         {
6959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6960                                PCI_VENDOR_ID_HP, 0x0609)
6961         },
6962         {
6963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6964                                PCI_VENDOR_ID_HP, 0x0650)
6965         },
6966         {
6967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6968                                PCI_VENDOR_ID_HP, 0x0651)
6969         },
6970         {
6971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6972                                PCI_VENDOR_ID_HP, 0x0652)
6973         },
6974         {
6975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6976                                PCI_VENDOR_ID_HP, 0x0653)
6977         },
6978         {
6979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6980                                PCI_VENDOR_ID_HP, 0x0654)
6981         },
6982         {
6983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6984                                PCI_VENDOR_ID_HP, 0x0655)
6985         },
6986         {
6987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6988                                PCI_VENDOR_ID_HP, 0x0700)
6989         },
6990         {
6991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6992                                PCI_VENDOR_ID_HP, 0x0701)
6993         },
6994         {
6995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6996                                PCI_VENDOR_ID_HP, 0x1001)
6997         },
6998         {
6999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7000                                PCI_VENDOR_ID_HP, 0x1100)
7001         },
7002         {
7003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7004                                PCI_VENDOR_ID_HP, 0x1101)
7005         },
7006         {
7007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7008                                PCI_ANY_ID, PCI_ANY_ID)
7009         },
7010         { 0 }
7011 };
7012
7013 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
7014
7015 static struct pci_driver pqi_pci_driver = {
7016         .name = DRIVER_NAME_SHORT,
7017         .id_table = pqi_pci_id_table,
7018         .probe = pqi_pci_probe,
7019         .remove = pqi_pci_remove,
7020         .shutdown = pqi_shutdown,
7021 #if defined(CONFIG_PM)
7022         .suspend = pqi_suspend,
7023         .resume = pqi_resume,
7024 #endif
7025 };
7026
7027 static int __init pqi_init(void)
7028 {
7029         int rc;
7030
7031         pr_info(DRIVER_NAME "\n");
7032
7033         pqi_sas_transport_template =
7034                 sas_attach_transport(&pqi_sas_transport_functions);
7035         if (!pqi_sas_transport_template)
7036                 return -ENODEV;
7037
7038         pqi_process_module_params();
7039
7040         rc = pci_register_driver(&pqi_pci_driver);
7041         if (rc)
7042                 sas_release_transport(pqi_sas_transport_template);
7043
7044         return rc;
7045 }
7046
7047 static void __exit pqi_cleanup(void)
7048 {
7049         pci_unregister_driver(&pqi_pci_driver);
7050         sas_release_transport(pqi_sas_transport_template);
7051 }
7052
7053 module_init(pqi_init);
7054 module_exit(pqi_cleanup);
7055
7056 static void __attribute__((unused)) verify_structures(void)
7057 {
7058         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7059                 sis_host_to_ctrl_doorbell) != 0x20);
7060         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7061                 sis_interrupt_mask) != 0x34);
7062         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7063                 sis_ctrl_to_host_doorbell) != 0x9c);
7064         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7065                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
7066         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7067                 sis_driver_scratch) != 0xb0);
7068         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7069                 sis_firmware_status) != 0xbc);
7070         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7071                 sis_mailbox) != 0x1000);
7072         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7073                 pqi_registers) != 0x4000);
7074
7075         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7076                 iu_type) != 0x0);
7077         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7078                 iu_length) != 0x2);
7079         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7080                 response_queue_id) != 0x4);
7081         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7082                 work_area) != 0x6);
7083         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7084
7085         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7086                 status) != 0x0);
7087         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7088                 service_response) != 0x1);
7089         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7090                 data_present) != 0x2);
7091         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7092                 reserved) != 0x3);
7093         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7094                 residual_count) != 0x4);
7095         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7096                 data_length) != 0x8);
7097         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7098                 reserved1) != 0xa);
7099         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7100                 data) != 0xc);
7101         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7102
7103         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7104                 data_in_result) != 0x0);
7105         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7106                 data_out_result) != 0x1);
7107         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7108                 reserved) != 0x2);
7109         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7110                 status) != 0x5);
7111         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7112                 status_qualifier) != 0x6);
7113         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7114                 sense_data_length) != 0x8);
7115         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7116                 response_data_length) != 0xa);
7117         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7118                 data_in_transferred) != 0xc);
7119         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7120                 data_out_transferred) != 0x10);
7121         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7122                 data) != 0x14);
7123         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7124
7125         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7126                 signature) != 0x0);
7127         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7128                 function_and_status_code) != 0x8);
7129         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7130                 max_admin_iq_elements) != 0x10);
7131         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7132                 max_admin_oq_elements) != 0x11);
7133         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7134                 admin_iq_element_length) != 0x12);
7135         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7136                 admin_oq_element_length) != 0x13);
7137         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7138                 max_reset_timeout) != 0x14);
7139         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7140                 legacy_intx_status) != 0x18);
7141         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7142                 legacy_intx_mask_set) != 0x1c);
7143         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7144                 legacy_intx_mask_clear) != 0x20);
7145         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7146                 device_status) != 0x40);
7147         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7148                 admin_iq_pi_offset) != 0x48);
7149         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7150                 admin_oq_ci_offset) != 0x50);
7151         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7152                 admin_iq_element_array_addr) != 0x58);
7153         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7154                 admin_oq_element_array_addr) != 0x60);
7155         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7156                 admin_iq_ci_addr) != 0x68);
7157         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7158                 admin_oq_pi_addr) != 0x70);
7159         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7160                 admin_iq_num_elements) != 0x78);
7161         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7162                 admin_oq_num_elements) != 0x79);
7163         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7164                 admin_queue_int_msg_num) != 0x7a);
7165         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7166                 device_error) != 0x80);
7167         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7168                 error_details) != 0x88);
7169         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7170                 device_reset) != 0x90);
7171         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7172                 power_action) != 0x94);
7173         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7174
7175         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7176                 header.iu_type) != 0);
7177         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7178                 header.iu_length) != 2);
7179         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7180                 header.work_area) != 6);
7181         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7182                 request_id) != 8);
7183         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7184                 function_code) != 10);
7185         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7186                 data.report_device_capability.buffer_length) != 44);
7187         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7188                 data.report_device_capability.sg_descriptor) != 48);
7189         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7190                 data.create_operational_iq.queue_id) != 12);
7191         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7192                 data.create_operational_iq.element_array_addr) != 16);
7193         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7194                 data.create_operational_iq.ci_addr) != 24);
7195         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7196                 data.create_operational_iq.num_elements) != 32);
7197         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7198                 data.create_operational_iq.element_length) != 34);
7199         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7200                 data.create_operational_iq.queue_protocol) != 36);
7201         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7202                 data.create_operational_oq.queue_id) != 12);
7203         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7204                 data.create_operational_oq.element_array_addr) != 16);
7205         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7206                 data.create_operational_oq.pi_addr) != 24);
7207         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7208                 data.create_operational_oq.num_elements) != 32);
7209         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7210                 data.create_operational_oq.element_length) != 34);
7211         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7212                 data.create_operational_oq.queue_protocol) != 36);
7213         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7214                 data.create_operational_oq.int_msg_num) != 40);
7215         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7216                 data.create_operational_oq.coalescing_count) != 42);
7217         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7218                 data.create_operational_oq.min_coalescing_time) != 44);
7219         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7220                 data.create_operational_oq.max_coalescing_time) != 48);
7221         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7222                 data.delete_operational_queue.queue_id) != 12);
7223         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7224         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7225                 data.create_operational_iq) != 64 - 11);
7226         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7227                 data.create_operational_oq) != 64 - 11);
7228         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7229                 data.delete_operational_queue) != 64 - 11);
7230
7231         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7232                 header.iu_type) != 0);
7233         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7234                 header.iu_length) != 2);
7235         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7236                 header.work_area) != 6);
7237         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7238                 request_id) != 8);
7239         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7240                 function_code) != 10);
7241         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7242                 status) != 11);
7243         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7244                 data.create_operational_iq.status_descriptor) != 12);
7245         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7246                 data.create_operational_iq.iq_pi_offset) != 16);
7247         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7248                 data.create_operational_oq.status_descriptor) != 12);
7249         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7250                 data.create_operational_oq.oq_ci_offset) != 16);
7251         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7252
7253         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7254                 header.iu_type) != 0);
7255         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7256                 header.iu_length) != 2);
7257         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7258                 header.response_queue_id) != 4);
7259         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7260                 header.work_area) != 6);
7261         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7262                 request_id) != 8);
7263         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7264                 nexus_id) != 10);
7265         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7266                 buffer_length) != 12);
7267         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7268                 lun_number) != 16);
7269         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7270                 protocol_specific) != 24);
7271         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7272                 error_index) != 27);
7273         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7274                 cdb) != 32);
7275         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7276                 sg_descriptors) != 64);
7277         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7278                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7279
7280         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7281                 header.iu_type) != 0);
7282         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7283                 header.iu_length) != 2);
7284         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7285                 header.response_queue_id) != 4);
7286         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7287                 header.work_area) != 6);
7288         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7289                 request_id) != 8);
7290         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7291                 nexus_id) != 12);
7292         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7293                 buffer_length) != 16);
7294         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7295                 data_encryption_key_index) != 22);
7296         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7297                 encrypt_tweak_lower) != 24);
7298         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7299                 encrypt_tweak_upper) != 28);
7300         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7301                 cdb) != 32);
7302         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7303                 error_index) != 48);
7304         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7305                 num_sg_descriptors) != 50);
7306         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7307                 cdb_length) != 51);
7308         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7309                 lun_number) != 52);
7310         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7311                 sg_descriptors) != 64);
7312         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7313                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7314
7315         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7316                 header.iu_type) != 0);
7317         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7318                 header.iu_length) != 2);
7319         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7320                 request_id) != 8);
7321         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7322                 error_index) != 10);
7323
7324         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7325                 header.iu_type) != 0);
7326         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7327                 header.iu_length) != 2);
7328         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7329                 header.response_queue_id) != 4);
7330         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7331                 request_id) != 8);
7332         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7333                 data.report_event_configuration.buffer_length) != 12);
7334         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7335                 data.report_event_configuration.sg_descriptors) != 16);
7336         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7337                 data.set_event_configuration.global_event_oq_id) != 10);
7338         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7339                 data.set_event_configuration.buffer_length) != 12);
7340         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7341                 data.set_event_configuration.sg_descriptors) != 16);
7342
7343         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7344                 max_inbound_iu_length) != 6);
7345         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7346                 max_outbound_iu_length) != 14);
7347         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7348
7349         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7350                 data_length) != 0);
7351         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7352                 iq_arbitration_priority_support_bitmask) != 8);
7353         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7354                 maximum_aw_a) != 9);
7355         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7356                 maximum_aw_b) != 10);
7357         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7358                 maximum_aw_c) != 11);
7359         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7360                 max_inbound_queues) != 16);
7361         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7362                 max_elements_per_iq) != 18);
7363         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7364                 max_iq_element_length) != 24);
7365         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7366                 min_iq_element_length) != 26);
7367         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7368                 max_outbound_queues) != 30);
7369         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7370                 max_elements_per_oq) != 32);
7371         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7372                 intr_coalescing_time_granularity) != 34);
7373         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7374                 max_oq_element_length) != 36);
7375         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7376                 min_oq_element_length) != 38);
7377         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7378                 iu_layer_descriptors) != 64);
7379         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7380
7381         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7382                 event_type) != 0);
7383         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7384                 oq_id) != 2);
7385         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7386
7387         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7388                 num_event_descriptors) != 2);
7389         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7390                 descriptors) != 4);
7391
7392         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7393                 ARRAY_SIZE(pqi_supported_event_types));
7394
7395         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7396                 header.iu_type) != 0);
7397         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7398                 header.iu_length) != 2);
7399         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7400                 event_type) != 8);
7401         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7402                 event_id) != 10);
7403         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7404                 additional_event_id) != 12);
7405         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7406                 data) != 16);
7407         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7408
7409         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7410                 header.iu_type) != 0);
7411         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7412                 header.iu_length) != 2);
7413         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7414                 event_type) != 8);
7415         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7416                 event_id) != 10);
7417         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7418                 additional_event_id) != 12);
7419         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7420
7421         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7422                 header.iu_type) != 0);
7423         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7424                 header.iu_length) != 2);
7425         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7426                 request_id) != 8);
7427         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7428                 nexus_id) != 10);
7429         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7430                 lun_number) != 16);
7431         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7432                 protocol_specific) != 24);
7433         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7434                 outbound_queue_id_to_manage) != 26);
7435         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7436                 request_id_to_manage) != 28);
7437         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7438                 task_management_function) != 30);
7439         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7440
7441         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7442                 header.iu_type) != 0);
7443         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7444                 header.iu_length) != 2);
7445         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7446                 request_id) != 8);
7447         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7448                 nexus_id) != 10);
7449         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7450                 additional_response_info) != 12);
7451         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7452                 response_code) != 15);
7453         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7454
7455         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7456                 configured_logical_drive_count) != 0);
7457         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7458                 configuration_signature) != 1);
7459         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7460                 firmware_version) != 5);
7461         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7462                 extended_logical_unit_count) != 154);
7463         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7464                 firmware_build_number) != 190);
7465         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7466                 controller_mode) != 292);
7467
7468         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7469                 phys_bay_in_box) != 115);
7470         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7471                 device_type) != 120);
7472         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7473                 redundant_path_present_map) != 1736);
7474         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7475                 active_path_number) != 1738);
7476         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7477                 alternate_paths_phys_connector) != 1739);
7478         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7479                 alternate_paths_phys_box_on_port) != 1755);
7480         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7481                 current_queue_depth_limit) != 1796);
7482         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7483
7484         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7485         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7486         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7487                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7488         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7489                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7490         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7491         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7492                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7493         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7494         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7495                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7496
7497         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7498         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7499                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7500 }