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 esc.storagedev@microsemi.com
  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          "1.0.4-100"
  44 #define DRIVER_MAJOR            1
  45 #define DRIVER_MINOR            0
  46 #define DRIVER_RELEASE          4
  47 #define DRIVER_REVISION         100
  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_CACHE_FLUSH:
 435                 request->data_direction = SOP_WRITE_FLAG;
 436                 cdb[0] = BMIC_WRITE;
 437                 cdb[6] = BMIC_CACHE_FLUSH;
 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 #define SA_CACHE_FLUSH_BUFFER_LENGTH    4
 589
 590 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
 591 {
 592         int rc;
 593         struct pqi_raid_path_request request;
 594         int pci_direction;
 595         u8 *buffer;
 596
 597         /*
 598          * Don't bother trying to flush the cache if the controller is
 599          * locked up.
 600          */
 601         if (pqi_ctrl_offline(ctrl_info))
 602                 return -ENXIO;
 603
 604         buffer = kzalloc(SA_CACHE_FLUSH_BUFFER_LENGTH, GFP_KERNEL);
 605         if (!buffer)
 606                 return -ENOMEM;
 607
 608         rc = pqi_build_raid_path_request(ctrl_info, &request,
 609                 SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
 610                 SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
 611         if (rc)
 612                 goto out;
 613
 614         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 615                 0, NULL, NO_TIMEOUT);
 616
 617         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 618                 pci_direction);
 619
 620 out:
 621         kfree(buffer);
 622
 623         return rc;
 624 }
 625
 626 static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 627         void *buffer, size_t buffer_length)
 628 {
 629         int rc;
 630         struct pqi_raid_path_request request;
 631         int pci_direction;
 632
 633         rc = pqi_build_raid_path_request(ctrl_info, &request,
 634                 BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 635                 buffer_length, 0, &pci_direction);
 636         if (rc)
 637                 return rc;
 638
 639         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 640                 0, NULL, NO_TIMEOUT);
 641
 642         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 643                 pci_direction);
 644
 645         return rc;
 646 }
 647
 648 #pragma pack(1)
 649
 650 struct bmic_host_wellness_driver_version {
 651         u8      start_tag[4];
 652         u8      driver_version_tag[2];
 653         __le16  driver_version_length;
 654         char    driver_version[32];
 655         u8      end_tag[2];
 656 };
 657
 658 #pragma pack()
 659
 660 static int pqi_write_driver_version_to_host_wellness(
 661         struct pqi_ctrl_info *ctrl_info)
 662 {
 663         int rc;
 664         struct bmic_host_wellness_driver_version *buffer;
 665         size_t buffer_length;
 666
 667         buffer_length = sizeof(*buffer);
 668
 669         buffer = kmalloc(buffer_length, GFP_KERNEL);
 670         if (!buffer)
 671                 return -ENOMEM;
 672
 673         buffer->start_tag[0] = '<';
 674         buffer->start_tag[1] = 'H';
 675         buffer->start_tag[2] = 'W';
 676         buffer->start_tag[3] = '>';
 677         buffer->driver_version_tag[0] = 'D';
 678         buffer->driver_version_tag[1] = 'V';
 679         put_unaligned_le16(sizeof(buffer->driver_version),
 680                 &buffer->driver_version_length);
 681         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 682                 sizeof(buffer->driver_version) - 1);
 683         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 684         buffer->end_tag[0] = 'Z';
 685         buffer->end_tag[1] = 'Z';
 686
 687         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 688
 689         kfree(buffer);
 690
 691         return rc;
 692 }
 693
 694 #pragma pack(1)
 695
 696 struct bmic_host_wellness_time {
 697         u8      start_tag[4];
 698         u8      time_tag[2];
 699         __le16  time_length;
 700         u8      time[8];
 701         u8      dont_write_tag[2];
 702         u8      end_tag[2];
 703 };
 704
 705 #pragma pack()
 706
 707 static int pqi_write_current_time_to_host_wellness(
 708         struct pqi_ctrl_info *ctrl_info)
 709 {
 710         int rc;
 711         struct bmic_host_wellness_time *buffer;
 712         size_t buffer_length;
 713         time64_t local_time;
 714         unsigned int year;
 715         struct tm tm;
 716
 717         buffer_length = sizeof(*buffer);
 718
 719         buffer = kmalloc(buffer_length, GFP_KERNEL);
 720         if (!buffer)
 721                 return -ENOMEM;
 722
 723         buffer->start_tag[0] = '<';
 724         buffer->start_tag[1] = 'H';
 725         buffer->start_tag[2] = 'W';
 726         buffer->start_tag[3] = '>';
 727         buffer->time_tag[0] = 'T';
 728         buffer->time_tag[1] = 'D';
 729         put_unaligned_le16(sizeof(buffer->time),
 730                 &buffer->time_length);
 731
 732         local_time = ktime_get_real_seconds();
 733         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 734         year = tm.tm_year + 1900;
 735
 736         buffer->time[0] = bin2bcd(tm.tm_hour);
 737         buffer->time[1] = bin2bcd(tm.tm_min);
 738         buffer->time[2] = bin2bcd(tm.tm_sec);
 739         buffer->time[3] = 0;
 740         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 741         buffer->time[5] = bin2bcd(tm.tm_mday);
 742         buffer->time[6] = bin2bcd(year / 100);
 743         buffer->time[7] = bin2bcd(year % 100);
 744
 745         buffer->dont_write_tag[0] = 'D';
 746         buffer->dont_write_tag[1] = 'W';
 747         buffer->end_tag[0] = 'Z';
 748         buffer->end_tag[1] = 'Z';
 749
 750         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 751
 752         kfree(buffer);
 753
 754         return rc;
 755 }
 756
 757 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
 758
 759 static void pqi_update_time_worker(struct work_struct *work)
 760 {
 761         int rc;
 762         struct pqi_ctrl_info *ctrl_info;
 763
 764         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 765                 update_time_work);
 766
 767         if (pqi_ctrl_offline(ctrl_info))
 768                 return;
 769
 770         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 771         if (rc)
 772                 dev_warn(&ctrl_info->pci_dev->dev,
 773                         "error updating time on controller\n");
 774
 775         schedule_delayed_work(&ctrl_info->update_time_work,
 776                 PQI_UPDATE_TIME_WORK_INTERVAL);
 777 }
 778
 779 static inline void pqi_schedule_update_time_worker(
 780         struct pqi_ctrl_info *ctrl_info)
 781 {
 782         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 783 }
 784
 785 static inline void pqi_cancel_update_time_worker(
 786         struct pqi_ctrl_info *ctrl_info)
 787 {
 788         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 789 }
 790
 791 static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 792         void *buffer, size_t buffer_length)
 793 {
 794         int rc;
 795         int pci_direction;
 796         struct pqi_raid_path_request request;
 797
 798         rc = pqi_build_raid_path_request(ctrl_info, &request,
 799                 cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 800         if (rc)
 801                 return rc;
 802
 803         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 804                 NULL, NO_TIMEOUT);
 805
 806         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 807                 pci_direction);
 808
 809         return rc;
 810 }
 811
 812 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 813         void **buffer)
 814 {
 815         int rc;
 816         size_t lun_list_length;
 817         size_t lun_data_length;
 818         size_t new_lun_list_length;
 819         void *lun_data = NULL;
 820         struct report_lun_header *report_lun_header;
 821
 822         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 823         if (!report_lun_header) {
 824                 rc = -ENOMEM;
 825                 goto out;
 826         }
 827
 828         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 829                 sizeof(*report_lun_header));
 830         if (rc)
 831                 goto out;
 832
 833         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 834
 835 again:
 836         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 837
 838         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 839         if (!lun_data) {
 840                 rc = -ENOMEM;
 841                 goto out;
 842         }
 843
 844         if (lun_list_length == 0) {
 845                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 846                 goto out;
 847         }
 848
 849         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 850         if (rc)
 851                 goto out;
 852
 853         new_lun_list_length = get_unaligned_be32(
 854                 &((struct report_lun_header *)lun_data)->list_length);
 855
 856         if (new_lun_list_length > lun_list_length) {
 857                 lun_list_length = new_lun_list_length;
 858                 kfree(lun_data);
 859                 goto again;
 860         }
 861
 862 out:
 863         kfree(report_lun_header);
 864
 865         if (rc) {
 866                 kfree(lun_data);
 867                 lun_data = NULL;
 868         }
 869
 870         *buffer = lun_data;
 871
 872         return rc;
 873 }
 874
 875 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 876         void **buffer)
 877 {
 878         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 879                 buffer);
 880 }
 881
 882 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 883         void **buffer)
 884 {
 885         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 886 }
 887
 888 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 889         struct report_phys_lun_extended **physdev_list,
 890         struct report_log_lun_extended **logdev_list)
 891 {
 892         int rc;
 893         size_t logdev_list_length;
 894         size_t logdev_data_length;
 895         struct report_log_lun_extended *internal_logdev_list;
 896         struct report_log_lun_extended *logdev_data;
 897         struct report_lun_header report_lun_header;
 898
 899         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 900         if (rc)
 901                 dev_err(&ctrl_info->pci_dev->dev,
 902                         "report physical LUNs failed\n");
 903
 904         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 905         if (rc)
 906                 dev_err(&ctrl_info->pci_dev->dev,
 907                         "report logical LUNs failed\n");
 908
 909         /*
 910          * Tack the controller itself onto the end of the logical device list.
 911          */
 912
 913         logdev_data = *logdev_list;
 914
 915         if (logdev_data) {
 916                 logdev_list_length =
 917                         get_unaligned_be32(&logdev_data->header.list_length);
 918         } else {
 919                 memset(&report_lun_header, 0, sizeof(report_lun_header));
 920                 logdev_data =
 921                         (struct report_log_lun_extended *)&report_lun_header;
 922                 logdev_list_length = 0;
 923         }
 924
 925         logdev_data_length = sizeof(struct report_lun_header) +
 926                 logdev_list_length;
 927
 928         internal_logdev_list = kmalloc(logdev_data_length +
 929                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
 930         if (!internal_logdev_list) {
 931                 kfree(*logdev_list);
 932                 *logdev_list = NULL;
 933                 return -ENOMEM;
 934         }
 935
 936         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 937         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 938                 sizeof(struct report_log_lun_extended_entry));
 939         put_unaligned_be32(logdev_list_length +
 940                 sizeof(struct report_log_lun_extended_entry),
 941                 &internal_logdev_list->header.list_length);
 942
 943         kfree(*logdev_list);
 944         *logdev_list = internal_logdev_list;
 945
 946         return 0;
 947 }
 948
 949 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 950         int bus, int target, int lun)
 951 {
 952         device->bus = bus;
 953         device->target = target;
 954         device->lun = lun;
 955 }
 956
 957 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 958 {
 959         u8 *scsi3addr;
 960         u32 lunid;
 961         int bus;
 962         int target;
 963         int lun;
 964
 965         scsi3addr = device->scsi3addr;
 966         lunid = get_unaligned_le32(scsi3addr);
 967
 968         if (pqi_is_hba_lunid(scsi3addr)) {
 969                 /* The specified device is the controller. */
 970                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 971                 device->target_lun_valid = true;
 972                 return;
 973         }
 974
 975         if (pqi_is_logical_device(device)) {
 976                 if (device->is_external_raid_device) {
 977                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
 978                         target = (lunid >> 16) & 0x3fff;
 979                         lun = lunid & 0xff;
 980                 } else {
 981                         bus = PQI_RAID_VOLUME_BUS;
 982                         target = 0;
 983                         lun = lunid & 0x3fff;
 984                 }
 985                 pqi_set_bus_target_lun(device, bus, target, lun);
 986                 device->target_lun_valid = true;
 987                 return;
 988         }
 989
 990         /*
 991          * Defer target and LUN assignment for non-controller physical devices
 992          * because the SAS transport layer will make these assignments later.
 993          */
 994         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 995 }
 996
 997 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
 998         struct pqi_scsi_dev *device)
 999 {
1000         int rc;
1001         u8 raid_level;
1002         u8 *buffer;
1003
1004         raid_level = SA_RAID_UNKNOWN;
1005
1006         buffer = kmalloc(64, GFP_KERNEL);
1007         if (buffer) {
1008                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1009                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1010                 if (rc == 0) {
1011                         raid_level = buffer[8];
1012                         if (raid_level > SA_RAID_MAX)
1013                                 raid_level = SA_RAID_UNKNOWN;
1014                 }
1015                 kfree(buffer);
1016         }
1017
1018         device->raid_level = raid_level;
1019 }
1020
1021 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1022         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1023 {
1024         char *err_msg;
1025         u32 raid_map_size;
1026         u32 r5or6_blocks_per_row;
1027         unsigned int num_phys_disks;
1028         unsigned int num_raid_map_entries;
1029
1030         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1031
1032         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1033                 err_msg = "RAID map too small";
1034                 goto bad_raid_map;
1035         }
1036
1037         if (raid_map_size > sizeof(*raid_map)) {
1038                 err_msg = "RAID map too large";
1039                 goto bad_raid_map;
1040         }
1041
1042         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1043                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
1044                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
1045         num_raid_map_entries = num_phys_disks *
1046                 get_unaligned_le16(&raid_map->row_cnt);
1047
1048         if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
1049                 err_msg = "invalid number of map entries in RAID map";
1050                 goto bad_raid_map;
1051         }
1052
1053         if (device->raid_level == SA_RAID_1) {
1054                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1055                         err_msg = "invalid RAID-1 map";
1056                         goto bad_raid_map;
1057                 }
1058         } else if (device->raid_level == SA_RAID_ADM) {
1059                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1060                         err_msg = "invalid RAID-1(ADM) map";
1061                         goto bad_raid_map;
1062                 }
1063         } else if ((device->raid_level == SA_RAID_5 ||
1064                 device->raid_level == SA_RAID_6) &&
1065                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1066                 /* RAID 50/60 */
1067                 r5or6_blocks_per_row =
1068                         get_unaligned_le16(&raid_map->strip_size) *
1069                         get_unaligned_le16(&raid_map->data_disks_per_row);
1070                 if (r5or6_blocks_per_row == 0) {
1071                         err_msg = "invalid RAID-5 or RAID-6 map";
1072                         goto bad_raid_map;
1073                 }
1074         }
1075
1076         return 0;
1077
1078 bad_raid_map:
1079         dev_warn(&ctrl_info->pci_dev->dev,
1080                 "scsi %d:%d:%d:%d %s\n",
1081                 ctrl_info->scsi_host->host_no,
1082                 device->bus, device->target, device->lun, err_msg);
1083
1084         return -EINVAL;
1085 }
1086
1087 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1088         struct pqi_scsi_dev *device)
1089 {
1090         int rc;
1091         int pci_direction;
1092         struct pqi_raid_path_request request;
1093         struct raid_map *raid_map;
1094
1095         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1096         if (!raid_map)
1097                 return -ENOMEM;
1098
1099         rc = pqi_build_raid_path_request(ctrl_info, &request,
1100                 CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
1101                 sizeof(*raid_map), 0, &pci_direction);
1102         if (rc)
1103                 goto error;
1104
1105         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
1106                 NULL, NO_TIMEOUT);
1107
1108         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
1109                 pci_direction);
1110
1111         if (rc)
1112                 goto error;
1113
1114         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1115         if (rc)
1116                 goto error;
1117
1118         device->raid_map = raid_map;
1119
1120         return 0;
1121
1122 error:
1123         kfree(raid_map);
1124
1125         return rc;
1126 }
1127
1128 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1129         struct pqi_scsi_dev *device)
1130 {
1131         int rc;
1132         u8 *buffer;
1133         u8 bypass_status;
1134
1135         buffer = kmalloc(64, GFP_KERNEL);
1136         if (!buffer)
1137                 return;
1138
1139         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1140                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1141         if (rc)
1142                 goto out;
1143
1144 #define RAID_BYPASS_STATUS      4
1145 #define RAID_BYPASS_CONFIGURED  0x1
1146 #define RAID_BYPASS_ENABLED     0x2
1147
1148         bypass_status = buffer[RAID_BYPASS_STATUS];
1149         device->raid_bypass_configured =
1150                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1151         if (device->raid_bypass_configured &&
1152                 (bypass_status & RAID_BYPASS_ENABLED) &&
1153                 pqi_get_raid_map(ctrl_info, device) == 0)
1154                 device->raid_bypass_enabled = true;
1155
1156 out:
1157         kfree(buffer);
1158 }
1159
1160 /*
1161  * Use vendor-specific VPD to determine online/offline status of a volume.
1162  */
1163
1164 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1165         struct pqi_scsi_dev *device)
1166 {
1167         int rc;
1168         size_t page_length;
1169         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1170         bool volume_offline = true;
1171         u32 volume_flags;
1172         struct ciss_vpd_logical_volume_status *vpd;
1173
1174         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1175         if (!vpd)
1176                 goto no_buffer;
1177
1178         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1179                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1180         if (rc)
1181                 goto out;
1182
1183         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1184                 volume_status) + vpd->page_length;
1185         if (page_length < sizeof(*vpd))
1186                 goto out;
1187
1188         volume_status = vpd->volume_status;
1189         volume_flags = get_unaligned_be32(&vpd->flags);
1190         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1191
1192 out:
1193         kfree(vpd);
1194 no_buffer:
1195         device->volume_status = volume_status;
1196         device->volume_offline = volume_offline;
1197 }
1198
1199 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1200         struct pqi_scsi_dev *device)
1201 {
1202         int rc;
1203         u8 *buffer;
1204
1205         buffer = kmalloc(64, GFP_KERNEL);
1206         if (!buffer)
1207                 return -ENOMEM;
1208
1209         /* Send an inquiry to the device to see what it is. */
1210         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1211         if (rc)
1212                 goto out;
1213
1214         scsi_sanitize_inquiry_string(&buffer[8], 8);
1215         scsi_sanitize_inquiry_string(&buffer[16], 16);
1216
1217         device->devtype = buffer[0] & 0x1f;
1218         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1219         memcpy(device->model, &buffer[16], sizeof(device->model));
1220
1221         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1222                 if (device->is_external_raid_device) {
1223                         device->raid_level = SA_RAID_UNKNOWN;
1224                         device->volume_status = CISS_LV_OK;
1225                         device->volume_offline = false;
1226                 } else {
1227                         pqi_get_raid_level(ctrl_info, device);
1228                         pqi_get_raid_bypass_status(ctrl_info, device);
1229                         pqi_get_volume_status(ctrl_info, device);
1230                 }
1231         }
1232
1233 out:
1234         kfree(buffer);
1235
1236         return rc;
1237 }
1238
1239 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1240         struct pqi_scsi_dev *device,
1241         struct bmic_identify_physical_device *id_phys)
1242 {
1243         int rc;
1244
1245         memset(id_phys, 0, sizeof(*id_phys));
1246
1247         rc = pqi_identify_physical_device(ctrl_info, device,
1248                 id_phys, sizeof(*id_phys));
1249         if (rc) {
1250                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1251                 return;
1252         }
1253
1254         device->queue_depth =
1255                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1256         device->device_type = id_phys->device_type;
1257         device->active_path_index = id_phys->active_path_number;
1258         device->path_map = id_phys->redundant_path_present_map;
1259         memcpy(&device->box,
1260                 &id_phys->alternate_paths_phys_box_on_port,
1261                 sizeof(device->box));
1262         memcpy(&device->phys_connector,
1263                 &id_phys->alternate_paths_phys_connector,
1264                 sizeof(device->phys_connector));
1265         device->bay = id_phys->phys_bay_in_box;
1266 }
1267
1268 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1269         struct pqi_scsi_dev *device)
1270 {
1271         char *status;
1272         static const char unknown_state_str[] =
1273                 "Volume is in an unknown state (%u)";
1274         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1275
1276         switch (device->volume_status) {
1277         case CISS_LV_OK:
1278                 status = "Volume online";
1279                 break;
1280         case CISS_LV_FAILED:
1281                 status = "Volume failed";
1282                 break;
1283         case CISS_LV_NOT_CONFIGURED:
1284                 status = "Volume not configured";
1285                 break;
1286         case CISS_LV_DEGRADED:
1287                 status = "Volume degraded";
1288                 break;
1289         case CISS_LV_READY_FOR_RECOVERY:
1290                 status = "Volume ready for recovery operation";
1291                 break;
1292         case CISS_LV_UNDERGOING_RECOVERY:
1293                 status = "Volume undergoing recovery";
1294                 break;
1295         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1296                 status = "Wrong physical drive was replaced";
1297                 break;
1298         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1299                 status = "A physical drive not properly connected";
1300                 break;
1301         case CISS_LV_HARDWARE_OVERHEATING:
1302                 status = "Hardware is overheating";
1303                 break;
1304         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1305                 status = "Hardware has overheated";
1306                 break;
1307         case CISS_LV_UNDERGOING_EXPANSION:
1308                 status = "Volume undergoing expansion";
1309                 break;
1310         case CISS_LV_NOT_AVAILABLE:
1311                 status = "Volume waiting for transforming volume";
1312                 break;
1313         case CISS_LV_QUEUED_FOR_EXPANSION:
1314                 status = "Volume queued for expansion";
1315                 break;
1316         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1317                 status = "Volume disabled due to SCSI ID conflict";
1318                 break;
1319         case CISS_LV_EJECTED:
1320                 status = "Volume has been ejected";
1321                 break;
1322         case CISS_LV_UNDERGOING_ERASE:
1323                 status = "Volume undergoing background erase";
1324                 break;
1325         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1326                 status = "Volume ready for predictive spare rebuild";
1327                 break;
1328         case CISS_LV_UNDERGOING_RPI:
1329                 status = "Volume undergoing rapid parity initialization";
1330                 break;
1331         case CISS_LV_PENDING_RPI:
1332                 status = "Volume queued for rapid parity initialization";
1333                 break;
1334         case CISS_LV_ENCRYPTED_NO_KEY:
1335                 status = "Encrypted volume inaccessible - key not present";
1336                 break;
1337         case CISS_LV_UNDERGOING_ENCRYPTION:
1338                 status = "Volume undergoing encryption process";
1339                 break;
1340         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1341                 status = "Volume undergoing encryption re-keying process";
1342                 break;
1343         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1344                 status = "Volume encrypted but encryption is disabled";
1345                 break;
1346         case CISS_LV_PENDING_ENCRYPTION:
1347                 status = "Volume pending migration to encrypted state";
1348                 break;
1349         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1350                 status = "Volume pending encryption rekeying";
1351                 break;
1352         case CISS_LV_NOT_SUPPORTED:
1353                 status = "Volume not supported on this controller";
1354                 break;
1355         case CISS_LV_STATUS_UNAVAILABLE:
1356                 status = "Volume status not available";
1357                 break;
1358         default:
1359                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1360                         unknown_state_str, device->volume_status);
1361                 status = unknown_state_buffer;
1362                 break;
1363         }
1364
1365         dev_info(&ctrl_info->pci_dev->dev,
1366                 "scsi %d:%d:%d:%d %s\n",
1367                 ctrl_info->scsi_host->host_no,
1368                 device->bus, device->target, device->lun, status);
1369 }
1370
1371 static void pqi_rescan_worker(struct work_struct *work)
1372 {
1373         struct pqi_ctrl_info *ctrl_info;
1374
1375         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1376                 rescan_work);
1377
1378         pqi_scan_scsi_devices(ctrl_info);
1379 }
1380
1381 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1382         struct pqi_scsi_dev *device)
1383 {
1384         int rc;
1385
1386         if (pqi_is_logical_device(device))
1387                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1388                         device->target, device->lun);
1389         else
1390                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1391
1392         return rc;
1393 }
1394
1395 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1396         struct pqi_scsi_dev *device)
1397 {
1398         if (pqi_is_logical_device(device))
1399                 scsi_remove_device(device->sdev);
1400         else
1401                 pqi_remove_sas_device(device);
1402 }
1403
1404 /* Assumes the SCSI device list lock is held. */
1405
1406 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1407         int bus, int target, int lun)
1408 {
1409         struct pqi_scsi_dev *device;
1410
1411         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1412                 scsi_device_list_entry)
1413                 if (device->bus == bus && device->target == target &&
1414                         device->lun == lun)
1415                         return device;
1416
1417         return NULL;
1418 }
1419
1420 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1421         struct pqi_scsi_dev *dev2)
1422 {
1423         if (dev1->is_physical_device != dev2->is_physical_device)
1424                 return false;
1425
1426         if (dev1->is_physical_device)
1427                 return dev1->wwid == dev2->wwid;
1428
1429         return memcmp(dev1->volume_id, dev2->volume_id,
1430                 sizeof(dev1->volume_id)) == 0;
1431 }
1432
1433 enum pqi_find_result {
1434         DEVICE_NOT_FOUND,
1435         DEVICE_CHANGED,
1436         DEVICE_SAME,
1437 };
1438
1439 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1440         struct pqi_scsi_dev *device_to_find,
1441         struct pqi_scsi_dev **matching_device)
1442 {
1443         struct pqi_scsi_dev *device;
1444
1445         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1446                 scsi_device_list_entry) {
1447                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1448                         device->scsi3addr)) {
1449                         *matching_device = device;
1450                         if (pqi_device_equal(device_to_find, device)) {
1451                                 if (device_to_find->volume_offline)
1452                                         return DEVICE_CHANGED;
1453                                 return DEVICE_SAME;
1454                         }
1455                         return DEVICE_CHANGED;
1456                 }
1457         }
1458
1459         return DEVICE_NOT_FOUND;
1460 }
1461
1462 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1463
1464 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1465         char *action, struct pqi_scsi_dev *device)
1466 {
1467         ssize_t count;
1468         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1469
1470         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1471                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1472
1473         if (device->target_lun_valid)
1474                 count += snprintf(buffer + count,
1475                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1476                         "%d:%d",
1477                         device->target,
1478                         device->lun);
1479         else
1480                 count += snprintf(buffer + count,
1481                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1482                         "-:-");
1483
1484         if (pqi_is_logical_device(device))
1485                 count += snprintf(buffer + count,
1486                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1487                         " %08x%08x",
1488                         *((u32 *)&device->scsi3addr),
1489                         *((u32 *)&device->scsi3addr[4]));
1490         else
1491                 count += snprintf(buffer + count,
1492                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1493                         " %016llx", device->sas_address);
1494
1495         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1496                 " %s %.8s %.16s ",
1497                 scsi_device_type(device->devtype),
1498                 device->vendor,
1499                 device->model);
1500
1501         if (pqi_is_logical_device(device)) {
1502                 if (device->devtype == TYPE_DISK)
1503                         count += snprintf(buffer + count,
1504                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1505                                 "SSDSmartPathCap%c En%c %-12s",
1506                                 device->raid_bypass_configured ? '+' : '-',
1507                                 device->raid_bypass_enabled ? '+' : '-',
1508                                 pqi_raid_level_to_string(device->raid_level));
1509         } else {
1510                 count += snprintf(buffer + count,
1511                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1512                         "AIO%c", device->aio_enabled ? '+' : '-');
1513                 if (device->devtype == TYPE_DISK ||
1514                         device->devtype == TYPE_ZBC)
1515                         count += snprintf(buffer + count,
1516                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1517                                 " qd=%-6d", device->queue_depth);
1518         }
1519
1520         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1521 }
1522
1523 /* Assumes the SCSI device list lock is held. */
1524
1525 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1526         struct pqi_scsi_dev *new_device)
1527 {
1528         existing_device->devtype = new_device->devtype;
1529         existing_device->device_type = new_device->device_type;
1530         existing_device->bus = new_device->bus;
1531         if (new_device->target_lun_valid) {
1532                 existing_device->target = new_device->target;
1533                 existing_device->lun = new_device->lun;
1534                 existing_device->target_lun_valid = true;
1535         }
1536
1537         /* By definition, the scsi3addr and wwid fields are already the same. */
1538
1539         existing_device->is_physical_device = new_device->is_physical_device;
1540         existing_device->is_external_raid_device =
1541                 new_device->is_external_raid_device;
1542         existing_device->aio_enabled = new_device->aio_enabled;
1543         memcpy(existing_device->vendor, new_device->vendor,
1544                 sizeof(existing_device->vendor));
1545         memcpy(existing_device->model, new_device->model,
1546                 sizeof(existing_device->model));
1547         existing_device->sas_address = new_device->sas_address;
1548         existing_device->raid_level = new_device->raid_level;
1549         existing_device->queue_depth = new_device->queue_depth;
1550         existing_device->aio_handle = new_device->aio_handle;
1551         existing_device->volume_status = new_device->volume_status;
1552         existing_device->active_path_index = new_device->active_path_index;
1553         existing_device->path_map = new_device->path_map;
1554         existing_device->bay = new_device->bay;
1555         memcpy(existing_device->box, new_device->box,
1556                 sizeof(existing_device->box));
1557         memcpy(existing_device->phys_connector, new_device->phys_connector,
1558                 sizeof(existing_device->phys_connector));
1559         existing_device->offload_to_mirror = 0;
1560         kfree(existing_device->raid_map);
1561         existing_device->raid_map = new_device->raid_map;
1562         existing_device->raid_bypass_configured =
1563                 new_device->raid_bypass_configured;
1564         existing_device->raid_bypass_enabled =
1565                 new_device->raid_bypass_enabled;
1566
1567         /* To prevent this from being freed later. */
1568         new_device->raid_map = NULL;
1569 }
1570
1571 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1572 {
1573         if (device) {
1574                 kfree(device->raid_map);
1575                 kfree(device);
1576         }
1577 }
1578
1579 /*
1580  * Called when exposing a new device to the OS fails in order to re-adjust
1581  * our internal SCSI device list to match the SCSI ML's view.
1582  */
1583
1584 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1585         struct pqi_scsi_dev *device)
1586 {
1587         unsigned long flags;
1588
1589         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1590         list_del(&device->scsi_device_list_entry);
1591         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1592
1593         /* Allow the device structure to be freed later. */
1594         device->keep_device = false;
1595 }
1596
1597 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1598         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1599 {
1600         int rc;
1601         unsigned int i;
1602         unsigned long flags;
1603         enum pqi_find_result find_result;
1604         struct pqi_scsi_dev *device;
1605         struct pqi_scsi_dev *next;
1606         struct pqi_scsi_dev *matching_device;
1607         LIST_HEAD(add_list);
1608         LIST_HEAD(delete_list);
1609
1610         /*
1611          * The idea here is to do as little work as possible while holding the
1612          * spinlock.  That's why we go to great pains to defer anything other
1613          * than updating the internal device list until after we release the
1614          * spinlock.
1615          */
1616
1617         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1618
1619         /* Assume that all devices in the existing list have gone away. */
1620         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1621                 scsi_device_list_entry)
1622                 device->device_gone = true;
1623
1624         for (i = 0; i < num_new_devices; i++) {
1625                 device = new_device_list[i];
1626
1627                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1628                                                 &matching_device);
1629
1630                 switch (find_result) {
1631                 case DEVICE_SAME:
1632                         /*
1633                          * The newly found device is already in the existing
1634                          * device list.
1635                          */
1636                         device->new_device = false;
1637                         matching_device->device_gone = false;
1638                         pqi_scsi_update_device(matching_device, device);
1639                         break;
1640                 case DEVICE_NOT_FOUND:
1641                         /*
1642                          * The newly found device is NOT in the existing device
1643                          * list.
1644                          */
1645                         device->new_device = true;
1646                         break;
1647                 case DEVICE_CHANGED:
1648                         /*
1649                          * The original device has gone away and we need to add
1650                          * the new device.
1651                          */
1652                         device->new_device = true;
1653                         break;
1654                 }
1655         }
1656
1657         /* Process all devices that have gone away. */
1658         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1659                 scsi_device_list_entry) {
1660                 if (device->device_gone) {
1661                         list_del(&device->scsi_device_list_entry);
1662                         list_add_tail(&device->delete_list_entry, &delete_list);
1663                 }
1664         }
1665
1666         /* Process all new devices. */
1667         for (i = 0; i < num_new_devices; i++) {
1668                 device = new_device_list[i];
1669                 if (!device->new_device)
1670                         continue;
1671                 if (device->volume_offline)
1672                         continue;
1673                 list_add_tail(&device->scsi_device_list_entry,
1674                         &ctrl_info->scsi_device_list);
1675                 list_add_tail(&device->add_list_entry, &add_list);
1676                 /* To prevent this device structure from being freed later. */
1677                 device->keep_device = true;
1678         }
1679
1680         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1681
1682         /* Remove all devices that have gone away. */
1683         list_for_each_entry_safe(device, next, &delete_list,
1684                 delete_list_entry) {
1685                 if (device->volume_offline) {
1686                         pqi_dev_info(ctrl_info, "offline", device);
1687                         pqi_show_volume_status(ctrl_info, device);
1688                 } else {
1689                         pqi_dev_info(ctrl_info, "removed", device);
1690                 }
1691                 if (device->sdev)
1692                         pqi_remove_device(ctrl_info, device);
1693                 list_del(&device->delete_list_entry);
1694                 pqi_free_device(device);
1695         }
1696
1697         /*
1698          * Notify the SCSI ML if the queue depth of any existing device has
1699          * changed.
1700          */
1701         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1702                 scsi_device_list_entry) {
1703                 if (device->sdev && device->queue_depth !=
1704                         device->advertised_queue_depth) {
1705                         device->advertised_queue_depth = device->queue_depth;
1706                         scsi_change_queue_depth(device->sdev,
1707                                 device->advertised_queue_depth);
1708                 }
1709         }
1710
1711         /* Expose any new devices. */
1712         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1713                 if (!device->sdev) {
1714                         pqi_dev_info(ctrl_info, "added", device);
1715                         rc = pqi_add_device(ctrl_info, device);
1716                         if (rc) {
1717                                 dev_warn(&ctrl_info->pci_dev->dev,
1718                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1719                                         ctrl_info->scsi_host->host_no,
1720                                         device->bus, device->target,
1721                                         device->lun);
1722                                 pqi_fixup_botched_add(ctrl_info, device);
1723                         }
1724                 }
1725         }
1726 }
1727
1728 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1729 {
1730         bool is_supported = false;
1731
1732         switch (device->devtype) {
1733         case TYPE_DISK:
1734         case TYPE_ZBC:
1735         case TYPE_TAPE:
1736         case TYPE_MEDIUM_CHANGER:
1737         case TYPE_ENCLOSURE:
1738                 is_supported = true;
1739                 break;
1740         case TYPE_RAID:
1741                 /*
1742                  * Only support the HBA controller itself as a RAID
1743                  * controller.  If it's a RAID controller other than
1744                  * the HBA itself (an external RAID controller, for
1745                  * example), we don't support it.
1746                  */
1747                 if (pqi_is_hba_lunid(device->scsi3addr))
1748                         is_supported = true;
1749                 break;
1750         }
1751
1752         return is_supported;
1753 }
1754
1755 static inline bool pqi_skip_device(u8 *scsi3addr)
1756 {
1757         /* Ignore all masked devices. */
1758         if (MASKED_DEVICE(scsi3addr))
1759                 return true;
1760
1761         return false;
1762 }
1763
1764 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1765 {
1766         int i;
1767         int rc;
1768         LIST_HEAD(new_device_list_head);
1769         struct report_phys_lun_extended *physdev_list = NULL;
1770         struct report_log_lun_extended *logdev_list = NULL;
1771         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1772         struct report_log_lun_extended_entry *log_lun_ext_entry;
1773         struct bmic_identify_physical_device *id_phys = NULL;
1774         u32 num_physicals;
1775         u32 num_logicals;
1776         struct pqi_scsi_dev **new_device_list = NULL;
1777         struct pqi_scsi_dev *device;
1778         struct pqi_scsi_dev *next;
1779         unsigned int num_new_devices;
1780         unsigned int num_valid_devices;
1781         bool is_physical_device;
1782         u8 *scsi3addr;
1783         static char *out_of_memory_msg =
1784                 "failed to allocate memory, device discovery stopped";
1785
1786         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1787         if (rc)
1788                 goto out;
1789
1790         if (physdev_list)
1791                 num_physicals =
1792                         get_unaligned_be32(&physdev_list->header.list_length)
1793                                 / sizeof(physdev_list->lun_entries[0]);
1794         else
1795                 num_physicals = 0;
1796
1797         if (logdev_list)
1798                 num_logicals =
1799                         get_unaligned_be32(&logdev_list->header.list_length)
1800                                 / sizeof(logdev_list->lun_entries[0]);
1801         else
1802                 num_logicals = 0;
1803
1804         if (num_physicals) {
1805                 /*
1806                  * We need this buffer for calls to pqi_get_physical_disk_info()
1807                  * below.  We allocate it here instead of inside
1808                  * pqi_get_physical_disk_info() because it's a fairly large
1809                  * buffer.
1810                  */
1811                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1812                 if (!id_phys) {
1813                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1814                                 out_of_memory_msg);
1815                         rc = -ENOMEM;
1816                         goto out;
1817                 }
1818         }
1819
1820         num_new_devices = num_physicals + num_logicals;
1821
1822         new_device_list = kmalloc(sizeof(*new_device_list) *
1823                 num_new_devices, GFP_KERNEL);
1824         if (!new_device_list) {
1825                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1826                 rc = -ENOMEM;
1827                 goto out;
1828         }
1829
1830         for (i = 0; i < num_new_devices; i++) {
1831                 device = kzalloc(sizeof(*device), GFP_KERNEL);
1832                 if (!device) {
1833                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1834                                 out_of_memory_msg);
1835                         rc = -ENOMEM;
1836                         goto out;
1837                 }
1838                 list_add_tail(&device->new_device_list_entry,
1839                         &new_device_list_head);
1840         }
1841
1842         device = NULL;
1843         num_valid_devices = 0;
1844
1845         for (i = 0; i < num_new_devices; i++) {
1846
1847                 if (i < num_physicals) {
1848                         is_physical_device = true;
1849                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
1850                         log_lun_ext_entry = NULL;
1851                         scsi3addr = phys_lun_ext_entry->lunid;
1852                 } else {
1853                         is_physical_device = false;
1854                         phys_lun_ext_entry = NULL;
1855                         log_lun_ext_entry =
1856                                 &logdev_list->lun_entries[i - num_physicals];
1857                         scsi3addr = log_lun_ext_entry->lunid;
1858                 }
1859
1860                 if (is_physical_device && pqi_skip_device(scsi3addr))
1861                         continue;
1862
1863                 if (device)
1864                         device = list_next_entry(device, new_device_list_entry);
1865                 else
1866                         device = list_first_entry(&new_device_list_head,
1867                                 struct pqi_scsi_dev, new_device_list_entry);
1868
1869                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1870                 device->is_physical_device = is_physical_device;
1871                 if (!is_physical_device)
1872                         device->is_external_raid_device =
1873                                 pqi_is_external_raid_addr(scsi3addr);
1874
1875                 /* Gather information about the device. */
1876                 rc = pqi_get_device_info(ctrl_info, device);
1877                 if (rc == -ENOMEM) {
1878                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1879                                 out_of_memory_msg);
1880                         goto out;
1881                 }
1882                 if (rc) {
1883                         if (device->is_physical_device)
1884                                 dev_warn(&ctrl_info->pci_dev->dev,
1885                                         "obtaining device info failed, skipping physical device %016llx\n",
1886                                         get_unaligned_be64(
1887                                                 &phys_lun_ext_entry->wwid));
1888                         else
1889                                 dev_warn(&ctrl_info->pci_dev->dev,
1890                                         "obtaining device info failed, skipping logical device %08x%08x\n",
1891                                         *((u32 *)&device->scsi3addr),
1892                                         *((u32 *)&device->scsi3addr[4]));
1893                         rc = 0;
1894                         continue;
1895                 }
1896
1897                 if (!pqi_is_supported_device(device))
1898                         continue;
1899
1900                 pqi_assign_bus_target_lun(device);
1901
1902                 if (device->is_physical_device) {
1903                         device->wwid = phys_lun_ext_entry->wwid;
1904                         if ((phys_lun_ext_entry->device_flags &
1905                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1906                                 phys_lun_ext_entry->aio_handle)
1907                                 device->aio_enabled = true;
1908                 } else {
1909                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1910                                 sizeof(device->volume_id));
1911                 }
1912
1913                 switch (device->devtype) {
1914                 case TYPE_DISK:
1915                 case TYPE_ZBC:
1916                 case TYPE_ENCLOSURE:
1917                         if (device->is_physical_device) {
1918                                 device->sas_address =
1919                                         get_unaligned_be64(&device->wwid);
1920                                 if (device->devtype == TYPE_DISK ||
1921                                         device->devtype == TYPE_ZBC) {
1922                                         device->aio_handle =
1923                                                 phys_lun_ext_entry->aio_handle;
1924                                         pqi_get_physical_disk_info(ctrl_info,
1925                                                 device, id_phys);
1926                                 }
1927                         }
1928                         break;
1929                 }
1930
1931                 new_device_list[num_valid_devices++] = device;
1932         }
1933
1934         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1935
1936 out:
1937         list_for_each_entry_safe(device, next, &new_device_list_head,
1938                 new_device_list_entry) {
1939                 if (device->keep_device)
1940                         continue;
1941                 list_del(&device->new_device_list_entry);
1942                 pqi_free_device(device);
1943         }
1944
1945         kfree(new_device_list);
1946         kfree(physdev_list);
1947         kfree(logdev_list);
1948         kfree(id_phys);
1949
1950         return rc;
1951 }
1952
1953 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1954 {
1955         unsigned long flags;
1956         struct pqi_scsi_dev *device;
1957
1958         while (1) {
1959                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1960
1961                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
1962                         struct pqi_scsi_dev, scsi_device_list_entry);
1963                 if (device)
1964                         list_del(&device->scsi_device_list_entry);
1965
1966                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
1967                         flags);
1968
1969                 if (!device)
1970                         break;
1971
1972                 if (device->sdev)
1973                         pqi_remove_device(ctrl_info, device);
1974                 pqi_free_device(device);
1975         }
1976 }
1977
1978 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1979 {
1980         int rc;
1981
1982         if (pqi_ctrl_offline(ctrl_info))
1983                 return -ENXIO;
1984
1985         mutex_lock(&ctrl_info->scan_mutex);
1986
1987         rc = pqi_update_scsi_devices(ctrl_info);
1988         if (rc)
1989                 pqi_schedule_rescan_worker_delayed(ctrl_info);
1990
1991         mutex_unlock(&ctrl_info->scan_mutex);
1992
1993         return rc;
1994 }
1995
1996 static void pqi_scan_start(struct Scsi_Host *shost)
1997 {
1998         pqi_scan_scsi_devices(shost_to_hba(shost));
1999 }
2000
2001 /* Returns TRUE if scan is finished. */
2002
2003 static int pqi_scan_finished(struct Scsi_Host *shost,
2004         unsigned long elapsed_time)
2005 {
2006         struct pqi_ctrl_info *ctrl_info;
2007
2008         ctrl_info = shost_priv(shost);
2009
2010         return !mutex_is_locked(&ctrl_info->scan_mutex);
2011 }
2012
2013 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2014 {
2015         mutex_lock(&ctrl_info->scan_mutex);
2016         mutex_unlock(&ctrl_info->scan_mutex);
2017 }
2018
2019 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2020 {
2021         mutex_lock(&ctrl_info->lun_reset_mutex);
2022         mutex_unlock(&ctrl_info->lun_reset_mutex);
2023 }
2024
2025 static inline void pqi_set_encryption_info(
2026         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2027         u64 first_block)
2028 {
2029         u32 volume_blk_size;
2030
2031         /*
2032          * Set the encryption tweak values based on logical block address.
2033          * If the block size is 512, the tweak value is equal to the LBA.
2034          * For other block sizes, tweak value is (LBA * block size) / 512.
2035          */
2036         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2037         if (volume_blk_size != 512)
2038                 first_block = (first_block * volume_blk_size) / 512;
2039
2040         encryption_info->data_encryption_key_index =
2041                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2042         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2043         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2044 }
2045
2046 /*
2047  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2048  */
2049
2050 #define PQI_RAID_BYPASS_INELIGIBLE      1
2051
2052 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2053         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2054         struct pqi_queue_group *queue_group)
2055 {
2056         struct raid_map *raid_map;
2057         bool is_write = false;
2058         u32 map_index;
2059         u64 first_block;
2060         u64 last_block;
2061         u32 block_cnt;
2062         u32 blocks_per_row;
2063         u64 first_row;
2064         u64 last_row;
2065         u32 first_row_offset;
2066         u32 last_row_offset;
2067         u32 first_column;
2068         u32 last_column;
2069         u64 r0_first_row;
2070         u64 r0_last_row;
2071         u32 r5or6_blocks_per_row;
2072         u64 r5or6_first_row;
2073         u64 r5or6_last_row;
2074         u32 r5or6_first_row_offset;
2075         u32 r5or6_last_row_offset;
2076         u32 r5or6_first_column;
2077         u32 r5or6_last_column;
2078         u16 data_disks_per_row;
2079         u32 total_disks_per_row;
2080         u16 layout_map_count;
2081         u32 stripesize;
2082         u16 strip_size;
2083         u32 first_group;
2084         u32 last_group;
2085         u32 current_group;
2086         u32 map_row;
2087         u32 aio_handle;
2088         u64 disk_block;
2089         u32 disk_block_cnt;
2090         u8 cdb[16];
2091         u8 cdb_length;
2092         int offload_to_mirror;
2093         struct pqi_encryption_info *encryption_info_ptr;
2094         struct pqi_encryption_info encryption_info;
2095 #if BITS_PER_LONG == 32
2096         u64 tmpdiv;
2097 #endif
2098
2099         /* Check for valid opcode, get LBA and block count. */
2100         switch (scmd->cmnd[0]) {
2101         case WRITE_6:
2102                 is_write = true;
2103                 /* fall through */
2104         case READ_6:
2105                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2106                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2107                 block_cnt = (u32)scmd->cmnd[4];
2108                 if (block_cnt == 0)
2109                         block_cnt = 256;
2110                 break;
2111         case WRITE_10:
2112                 is_write = true;
2113                 /* fall through */
2114         case READ_10:
2115                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2116                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2117                 break;
2118         case WRITE_12:
2119                 is_write = true;
2120                 /* fall through */
2121         case READ_12:
2122                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2123                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2124                 break;
2125         case WRITE_16:
2126                 is_write = true;
2127                 /* fall through */
2128         case READ_16:
2129                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2130                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2131                 break;
2132         default:
2133                 /* Process via normal I/O path. */
2134                 return PQI_RAID_BYPASS_INELIGIBLE;
2135         }
2136
2137         /* Check for write to non-RAID-0. */
2138         if (is_write && device->raid_level != SA_RAID_0)
2139                 return PQI_RAID_BYPASS_INELIGIBLE;
2140
2141         if (unlikely(block_cnt == 0))
2142                 return PQI_RAID_BYPASS_INELIGIBLE;
2143
2144         last_block = first_block + block_cnt - 1;
2145         raid_map = device->raid_map;
2146
2147         /* Check for invalid block or wraparound. */
2148         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2149                 last_block < first_block)
2150                 return PQI_RAID_BYPASS_INELIGIBLE;
2151
2152         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2153         strip_size = get_unaligned_le16(&raid_map->strip_size);
2154         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2155
2156         /* Calculate stripe information for the request. */
2157         blocks_per_row = data_disks_per_row * strip_size;
2158 #if BITS_PER_LONG == 32
2159         tmpdiv = first_block;
2160         do_div(tmpdiv, blocks_per_row);
2161         first_row = tmpdiv;
2162         tmpdiv = last_block;
2163         do_div(tmpdiv, blocks_per_row);
2164         last_row = tmpdiv;
2165         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2166         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2167         tmpdiv = first_row_offset;
2168         do_div(tmpdiv, strip_size);
2169         first_column = tmpdiv;
2170         tmpdiv = last_row_offset;
2171         do_div(tmpdiv, strip_size);
2172         last_column = tmpdiv;
2173 #else
2174         first_row = first_block / blocks_per_row;
2175         last_row = last_block / blocks_per_row;
2176         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2177         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2178         first_column = first_row_offset / strip_size;
2179         last_column = last_row_offset / strip_size;
2180 #endif
2181
2182         /* If this isn't a single row/column then give to the controller. */
2183         if (first_row != last_row || first_column != last_column)
2184                 return PQI_RAID_BYPASS_INELIGIBLE;
2185
2186         /* Proceeding with driver mapping. */
2187         total_disks_per_row = data_disks_per_row +
2188                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2189         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2190                 get_unaligned_le16(&raid_map->row_cnt);
2191         map_index = (map_row * total_disks_per_row) + first_column;
2192
2193         /* RAID 1 */
2194         if (device->raid_level == SA_RAID_1) {
2195                 if (device->offload_to_mirror)
2196                         map_index += data_disks_per_row;
2197                 device->offload_to_mirror = !device->offload_to_mirror;
2198         } else if (device->raid_level == SA_RAID_ADM) {
2199                 /* RAID ADM */
2200                 /*
2201                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2202                  * divisible by 3.
2203                  */
2204                 offload_to_mirror = device->offload_to_mirror;
2205                 if (offload_to_mirror == 0)  {
2206                         /* use physical disk in the first mirrored group. */
2207                         map_index %= data_disks_per_row;
2208                 } else {
2209                         do {
2210                                 /*
2211                                  * Determine mirror group that map_index
2212                                  * indicates.
2213                                  */
2214                                 current_group = map_index / data_disks_per_row;
2215
2216                                 if (offload_to_mirror != current_group) {
2217                                         if (current_group <
2218                                                 layout_map_count - 1) {
2219                                                 /*
2220                                                  * Select raid index from
2221                                                  * next group.
2222                                                  */
2223                                                 map_index += data_disks_per_row;
2224                                                 current_group++;
2225                                         } else {
2226                                                 /*
2227                                                  * Select raid index from first
2228                                                  * group.
2229                                                  */
2230                                                 map_index %= data_disks_per_row;
2231                                                 current_group = 0;
2232                                         }
2233                                 }
2234                         } while (offload_to_mirror != current_group);
2235                 }
2236
2237                 /* Set mirror group to use next time. */
2238                 offload_to_mirror =
2239                         (offload_to_mirror >= layout_map_count - 1) ?
2240                                 0 : offload_to_mirror + 1;
2241                 WARN_ON(offload_to_mirror >= layout_map_count);
2242                 device->offload_to_mirror = offload_to_mirror;
2243                 /*
2244                  * Avoid direct use of device->offload_to_mirror within this
2245                  * function since multiple threads might simultaneously
2246                  * increment it beyond the range of device->layout_map_count -1.
2247                  */
2248         } else if ((device->raid_level == SA_RAID_5 ||
2249                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2250                 /* RAID 50/60 */
2251                 /* Verify first and last block are in same RAID group */
2252                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2253                 stripesize = r5or6_blocks_per_row * layout_map_count;
2254 #if BITS_PER_LONG == 32
2255                 tmpdiv = first_block;
2256                 first_group = do_div(tmpdiv, stripesize);
2257                 tmpdiv = first_group;
2258                 do_div(tmpdiv, r5or6_blocks_per_row);
2259                 first_group = tmpdiv;
2260                 tmpdiv = last_block;
2261                 last_group = do_div(tmpdiv, stripesize);
2262                 tmpdiv = last_group;
2263                 do_div(tmpdiv, r5or6_blocks_per_row);
2264                 last_group = tmpdiv;
2265 #else
2266                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2267                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2268 #endif
2269                 if (first_group != last_group)
2270                         return PQI_RAID_BYPASS_INELIGIBLE;
2271
2272                 /* Verify request is in a single row of RAID 5/6 */
2273 #if BITS_PER_LONG == 32
2274                 tmpdiv = first_block;
2275                 do_div(tmpdiv, stripesize);
2276                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2277                 tmpdiv = last_block;
2278                 do_div(tmpdiv, stripesize);
2279                 r5or6_last_row = r0_last_row = tmpdiv;
2280 #else
2281                 first_row = r5or6_first_row = r0_first_row =
2282                         first_block / stripesize;
2283                 r5or6_last_row = r0_last_row = last_block / stripesize;
2284 #endif
2285                 if (r5or6_first_row != r5or6_last_row)
2286                         return PQI_RAID_BYPASS_INELIGIBLE;
2287
2288                 /* Verify request is in a single column */
2289 #if BITS_PER_LONG == 32
2290                 tmpdiv = first_block;
2291                 first_row_offset = do_div(tmpdiv, stripesize);
2292                 tmpdiv = first_row_offset;
2293                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2294                 r5or6_first_row_offset = first_row_offset;
2295                 tmpdiv = last_block;
2296                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2297                 tmpdiv = r5or6_last_row_offset;
2298                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2299                 tmpdiv = r5or6_first_row_offset;
2300                 do_div(tmpdiv, strip_size);
2301                 first_column = r5or6_first_column = tmpdiv;
2302                 tmpdiv = r5or6_last_row_offset;
2303                 do_div(tmpdiv, strip_size);
2304                 r5or6_last_column = tmpdiv;
2305 #else
2306                 first_row_offset = r5or6_first_row_offset =
2307                         (u32)((first_block % stripesize) %
2308                         r5or6_blocks_per_row);
2309
2310                 r5or6_last_row_offset =
2311                         (u32)((last_block % stripesize) %
2312                         r5or6_blocks_per_row);
2313
2314                 first_column = r5or6_first_row_offset / strip_size;
2315                 r5or6_first_column = first_column;
2316                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2317 #endif
2318                 if (r5or6_first_column != r5or6_last_column)
2319                         return PQI_RAID_BYPASS_INELIGIBLE;
2320
2321                 /* Request is eligible */
2322                 map_row =
2323                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2324                         get_unaligned_le16(&raid_map->row_cnt);
2325
2326                 map_index = (first_group *
2327                         (get_unaligned_le16(&raid_map->row_cnt) *
2328                         total_disks_per_row)) +
2329                         (map_row * total_disks_per_row) + first_column;
2330         }
2331
2332         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2333                 return PQI_RAID_BYPASS_INELIGIBLE;
2334
2335         aio_handle = raid_map->disk_data[map_index].aio_handle;
2336         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2337                 first_row * strip_size +
2338                 (first_row_offset - first_column * strip_size);
2339         disk_block_cnt = block_cnt;
2340
2341         /* Handle differing logical/physical block sizes. */
2342         if (raid_map->phys_blk_shift) {
2343                 disk_block <<= raid_map->phys_blk_shift;
2344                 disk_block_cnt <<= raid_map->phys_blk_shift;
2345         }
2346
2347         if (unlikely(disk_block_cnt > 0xffff))
2348                 return PQI_RAID_BYPASS_INELIGIBLE;
2349
2350         /* Build the new CDB for the physical disk I/O. */
2351         if (disk_block > 0xffffffff) {
2352                 cdb[0] = is_write ? WRITE_16 : READ_16;
2353                 cdb[1] = 0;
2354                 put_unaligned_be64(disk_block, &cdb[2]);
2355                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2356                 cdb[14] = 0;
2357                 cdb[15] = 0;
2358                 cdb_length = 16;
2359         } else {
2360                 cdb[0] = is_write ? WRITE_10 : READ_10;
2361                 cdb[1] = 0;
2362                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2363                 cdb[6] = 0;
2364                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2365                 cdb[9] = 0;
2366                 cdb_length = 10;
2367         }
2368
2369         if (get_unaligned_le16(&raid_map->flags) &
2370                 RAID_MAP_ENCRYPTION_ENABLED) {
2371                 pqi_set_encryption_info(&encryption_info, raid_map,
2372                         first_block);
2373                 encryption_info_ptr = &encryption_info;
2374         } else {
2375                 encryption_info_ptr = NULL;
2376         }
2377
2378         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2379                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2380 }
2381
2382 #define PQI_STATUS_IDLE         0x0
2383
2384 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2385 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2386
2387 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2388 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2389 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2390 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2391 #define PQI_DEVICE_STATE_ERROR                          0x4
2392
2393 #define PQI_MODE_READY_TIMEOUT_SECS             30
2394 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2395
2396 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2397 {
2398         struct pqi_device_registers __iomem *pqi_registers;
2399         unsigned long timeout;
2400         u64 signature;
2401         u8 status;
2402
2403         pqi_registers = ctrl_info->pqi_registers;
2404         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2405
2406         while (1) {
2407                 signature = readq(&pqi_registers->signature);
2408                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2409                         sizeof(signature)) == 0)
2410                         break;
2411                 if (time_after(jiffies, timeout)) {
2412                         dev_err(&ctrl_info->pci_dev->dev,
2413                                 "timed out waiting for PQI signature\n");
2414                         return -ETIMEDOUT;
2415                 }
2416                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2417         }
2418
2419         while (1) {
2420                 status = readb(&pqi_registers->function_and_status_code);
2421                 if (status == PQI_STATUS_IDLE)
2422                         break;
2423                 if (time_after(jiffies, timeout)) {
2424                         dev_err(&ctrl_info->pci_dev->dev,
2425                                 "timed out waiting for PQI IDLE\n");
2426                         return -ETIMEDOUT;
2427                 }
2428                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2429         }
2430
2431         while (1) {
2432                 if (readl(&pqi_registers->device_status) ==
2433                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2434                         break;
2435                 if (time_after(jiffies, timeout)) {
2436                         dev_err(&ctrl_info->pci_dev->dev,
2437                                 "timed out waiting for PQI all registers ready\n");
2438                         return -ETIMEDOUT;
2439                 }
2440                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2441         }
2442
2443         return 0;
2444 }
2445
2446 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2447 {
2448         struct pqi_scsi_dev *device;
2449
2450         device = io_request->scmd->device->hostdata;
2451         device->raid_bypass_enabled = false;
2452         device->aio_enabled = false;
2453 }
2454
2455 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2456 {
2457         struct pqi_ctrl_info *ctrl_info;
2458         struct pqi_scsi_dev *device;
2459
2460         device = sdev->hostdata;
2461         if (device->device_offline)
2462                 return;
2463
2464         device->device_offline = true;
2465         scsi_device_set_state(sdev, SDEV_OFFLINE);
2466         ctrl_info = shost_to_hba(sdev->host);
2467         pqi_schedule_rescan_worker(ctrl_info);
2468         dev_err(&ctrl_info->pci_dev->dev, "offlined %s scsi %d:%d:%d:%d\n",
2469                 path, ctrl_info->scsi_host->host_no, device->bus,
2470                 device->target, device->lun);
2471 }
2472
2473 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2474 {
2475         u8 scsi_status;
2476         u8 host_byte;
2477         struct scsi_cmnd *scmd;
2478         struct pqi_raid_error_info *error_info;
2479         size_t sense_data_length;
2480         int residual_count;
2481         int xfer_count;
2482         struct scsi_sense_hdr sshdr;
2483
2484         scmd = io_request->scmd;
2485         if (!scmd)
2486                 return;
2487
2488         error_info = io_request->error_info;
2489         scsi_status = error_info->status;
2490         host_byte = DID_OK;
2491
2492         switch (error_info->data_out_result) {
2493         case PQI_DATA_IN_OUT_GOOD:
2494                 break;
2495         case PQI_DATA_IN_OUT_UNDERFLOW:
2496                 xfer_count =
2497                         get_unaligned_le32(&error_info->data_out_transferred);
2498                 residual_count = scsi_bufflen(scmd) - xfer_count;
2499                 scsi_set_resid(scmd, residual_count);
2500                 if (xfer_count < scmd->underflow)
2501                         host_byte = DID_SOFT_ERROR;
2502                 break;
2503         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2504         case PQI_DATA_IN_OUT_ABORTED:
2505                 host_byte = DID_ABORT;
2506                 break;
2507         case PQI_DATA_IN_OUT_TIMEOUT:
2508                 host_byte = DID_TIME_OUT;
2509                 break;
2510         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2511         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2512         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2513         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2514         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2515         case PQI_DATA_IN_OUT_ERROR:
2516         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2517         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2518         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2519         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2520         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2521         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2522         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2523         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2524         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2525         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2526         default:
2527                 host_byte = DID_ERROR;
2528                 break;
2529         }
2530
2531         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2532         if (sense_data_length == 0)
2533                 sense_data_length =
2534                         get_unaligned_le16(&error_info->response_data_length);
2535         if (sense_data_length) {
2536                 if (sense_data_length > sizeof(error_info->data))
2537                         sense_data_length = sizeof(error_info->data);
2538
2539                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2540                         scsi_normalize_sense(error_info->data,
2541                                 sense_data_length, &sshdr) &&
2542                                 sshdr.sense_key == HARDWARE_ERROR &&
2543                                 sshdr.asc == 0x3e &&
2544                                 sshdr.ascq == 0x1) {
2545                         pqi_take_device_offline(scmd->device, "RAID");
2546                         host_byte = DID_NO_CONNECT;
2547                 }
2548
2549                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2550                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2551                 memcpy(scmd->sense_buffer, error_info->data,
2552                         sense_data_length);
2553         }
2554
2555         scmd->result = scsi_status;
2556         set_host_byte(scmd, host_byte);
2557 }
2558
2559 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2560 {
2561         u8 scsi_status;
2562         u8 host_byte;
2563         struct scsi_cmnd *scmd;
2564         struct pqi_aio_error_info *error_info;
2565         size_t sense_data_length;
2566         int residual_count;
2567         int xfer_count;
2568         bool device_offline;
2569
2570         scmd = io_request->scmd;
2571         error_info = io_request->error_info;
2572         host_byte = DID_OK;
2573         sense_data_length = 0;
2574         device_offline = false;
2575
2576         switch (error_info->service_response) {
2577         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2578                 scsi_status = error_info->status;
2579                 break;
2580         case PQI_AIO_SERV_RESPONSE_FAILURE:
2581                 switch (error_info->status) {
2582                 case PQI_AIO_STATUS_IO_ABORTED:
2583                         scsi_status = SAM_STAT_TASK_ABORTED;
2584                         break;
2585                 case PQI_AIO_STATUS_UNDERRUN:
2586                         scsi_status = SAM_STAT_GOOD;
2587                         residual_count = get_unaligned_le32(
2588                                                 &error_info->residual_count);
2589                         scsi_set_resid(scmd, residual_count);
2590                         xfer_count = scsi_bufflen(scmd) - residual_count;
2591                         if (xfer_count < scmd->underflow)
2592                                 host_byte = DID_SOFT_ERROR;
2593                         break;
2594                 case PQI_AIO_STATUS_OVERRUN:
2595                         scsi_status = SAM_STAT_GOOD;
2596                         break;
2597                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2598                         pqi_aio_path_disabled(io_request);
2599                         scsi_status = SAM_STAT_GOOD;
2600                         io_request->status = -EAGAIN;
2601                         break;
2602                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2603                 case PQI_AIO_STATUS_INVALID_DEVICE:
2604                         if (!io_request->raid_bypass) {
2605                                 device_offline = true;
2606                                 pqi_take_device_offline(scmd->device, "AIO");
2607                                 host_byte = DID_NO_CONNECT;
2608                         }
2609                         scsi_status = SAM_STAT_CHECK_CONDITION;
2610                         break;
2611                 case PQI_AIO_STATUS_IO_ERROR:
2612                 default:
2613                         scsi_status = SAM_STAT_CHECK_CONDITION;
2614                         break;
2615                 }
2616                 break;
2617         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2618         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2619                 scsi_status = SAM_STAT_GOOD;
2620                 break;
2621         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2622         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2623         default:
2624                 scsi_status = SAM_STAT_CHECK_CONDITION;
2625                 break;
2626         }
2627
2628         if (error_info->data_present) {
2629                 sense_data_length =
2630                         get_unaligned_le16(&error_info->data_length);
2631                 if (sense_data_length) {
2632                         if (sense_data_length > sizeof(error_info->data))
2633                                 sense_data_length = sizeof(error_info->data);
2634                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2635                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2636                         memcpy(scmd->sense_buffer, error_info->data,
2637                                 sense_data_length);
2638                 }
2639         }
2640
2641         if (device_offline && sense_data_length == 0)
2642                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2643                         0x3e, 0x1);
2644
2645         scmd->result = scsi_status;
2646         set_host_byte(scmd, host_byte);
2647 }
2648
2649 static void pqi_process_io_error(unsigned int iu_type,
2650         struct pqi_io_request *io_request)
2651 {
2652         switch (iu_type) {
2653         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2654                 pqi_process_raid_io_error(io_request);
2655                 break;
2656         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2657                 pqi_process_aio_io_error(io_request);
2658                 break;
2659         }
2660 }
2661
2662 static int pqi_interpret_task_management_response(
2663         struct pqi_task_management_response *response)
2664 {
2665         int rc;
2666
2667         switch (response->response_code) {
2668         case SOP_TMF_COMPLETE:
2669         case SOP_TMF_FUNCTION_SUCCEEDED:
2670                 rc = 0;
2671                 break;
2672         default:
2673                 rc = -EIO;
2674                 break;
2675         }
2676
2677         return rc;
2678 }
2679
2680 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2681         struct pqi_queue_group *queue_group)
2682 {
2683         unsigned int num_responses;
2684         pqi_index_t oq_pi;
2685         pqi_index_t oq_ci;
2686         struct pqi_io_request *io_request;
2687         struct pqi_io_response *response;
2688         u16 request_id;
2689
2690         num_responses = 0;
2691         oq_ci = queue_group->oq_ci_copy;
2692
2693         while (1) {
2694                 oq_pi = *queue_group->oq_pi;
2695                 if (oq_pi == oq_ci)
2696                         break;
2697
2698                 num_responses++;
2699                 response = queue_group->oq_element_array +
2700                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2701
2702                 request_id = get_unaligned_le16(&response->request_id);
2703                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2704
2705                 io_request = &ctrl_info->io_request_pool[request_id];
2706                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2707
2708                 switch (response->header.iu_type) {
2709                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2710                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2711                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2712                         break;
2713                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2714                         io_request->status =
2715                                 pqi_interpret_task_management_response(
2716                                         (void *)response);
2717                         break;
2718                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2719                         pqi_aio_path_disabled(io_request);
2720                         io_request->status = -EAGAIN;
2721                         break;
2722                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2723                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2724                         io_request->error_info = ctrl_info->error_buffer +
2725                                 (get_unaligned_le16(&response->error_index) *
2726                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2727                         pqi_process_io_error(response->header.iu_type,
2728                                 io_request);
2729                         break;
2730                 default:
2731                         dev_err(&ctrl_info->pci_dev->dev,
2732                                 "unexpected IU type: 0x%x\n",
2733                                 response->header.iu_type);
2734                         break;
2735                 }
2736
2737                 io_request->io_complete_callback(io_request,
2738                         io_request->context);
2739
2740                 /*
2741                  * Note that the I/O request structure CANNOT BE TOUCHED after
2742                  * returning from the I/O completion callback!
2743                  */
2744
2745                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2746         }
2747
2748         if (num_responses) {
2749                 queue_group->oq_ci_copy = oq_ci;
2750                 writel(oq_ci, queue_group->oq_ci);
2751         }
2752
2753         return num_responses;
2754 }
2755
2756 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2757         unsigned int ci, unsigned int elements_in_queue)
2758 {
2759         unsigned int num_elements_used;
2760
2761         if (pi >= ci)
2762                 num_elements_used = pi - ci;
2763         else
2764                 num_elements_used = elements_in_queue - ci + pi;
2765
2766         return elements_in_queue - num_elements_used - 1;
2767 }
2768
2769 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
2770         struct pqi_event_acknowledge_request *iu, size_t iu_length)
2771 {
2772         pqi_index_t iq_pi;
2773         pqi_index_t iq_ci;
2774         unsigned long flags;
2775         void *next_element;
2776         struct pqi_queue_group *queue_group;
2777
2778         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2779         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2780
2781         while (1) {
2782                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2783
2784                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2785                 iq_ci = *queue_group->iq_ci[RAID_PATH];
2786
2787                 if (pqi_num_elements_free(iq_pi, iq_ci,
2788                         ctrl_info->num_elements_per_iq))
2789                         break;
2790
2791                 spin_unlock_irqrestore(
2792                         &queue_group->submit_lock[RAID_PATH], flags);
2793
2794                 if (pqi_ctrl_offline(ctrl_info))
2795                         return;
2796         }
2797
2798         next_element = queue_group->iq_element_array[RAID_PATH] +
2799                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2800
2801         memcpy(next_element, iu, iu_length);
2802
2803         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2804         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2805
2806         /*
2807          * This write notifies the controller that an IU is available to be
2808          * processed.
2809          */
2810         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2811
2812         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2813 }
2814
2815 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2816         struct pqi_event *event)
2817 {
2818         struct pqi_event_acknowledge_request request;
2819
2820         memset(&request, 0, sizeof(request));
2821
2822         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2823         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2824                 &request.header.iu_length);
2825         request.event_type = event->event_type;
2826         request.event_id = event->event_id;
2827         request.additional_event_id = event->additional_event_id;
2828
2829         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
2830 }
2831
2832 static void pqi_event_worker(struct work_struct *work)
2833 {
2834         unsigned int i;
2835         struct pqi_ctrl_info *ctrl_info;
2836         struct pqi_event *event;
2837
2838         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2839
2840         pqi_ctrl_busy(ctrl_info);
2841         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
2842         if (pqi_ctrl_offline(ctrl_info))
2843                 goto out;
2844
2845         pqi_schedule_rescan_worker_delayed(ctrl_info);
2846
2847         event = ctrl_info->events;
2848         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2849                 if (event->pending) {
2850                         event->pending = false;
2851                         pqi_acknowledge_event(ctrl_info, event);
2852                 }
2853                 event++;
2854         }
2855
2856 out:
2857         pqi_ctrl_unbusy(ctrl_info);
2858 }
2859
2860 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * HZ)
2861
2862 static void pqi_heartbeat_timer_handler(unsigned long data)
2863 {
2864         int num_interrupts;
2865         u32 heartbeat_count;
2866         struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
2867
2868         pqi_check_ctrl_health(ctrl_info);
2869         if (pqi_ctrl_offline(ctrl_info))
2870                 return;
2871
2872         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2873         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
2874
2875         if (num_interrupts == ctrl_info->previous_num_interrupts) {
2876                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
2877                         dev_err(&ctrl_info->pci_dev->dev,
2878                                 "no heartbeat detected - last heartbeat count: %u\n",
2879                                 heartbeat_count);
2880                         pqi_take_ctrl_offline(ctrl_info);
2881                         return;
2882                 }
2883         } else {
2884                 ctrl_info->previous_num_interrupts = num_interrupts;
2885         }
2886
2887         ctrl_info->previous_heartbeat_count = heartbeat_count;
2888         mod_timer(&ctrl_info->heartbeat_timer,
2889                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2890 }
2891
2892 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2893 {
2894         if (!ctrl_info->heartbeat_counter)
2895                 return;
2896
2897         ctrl_info->previous_num_interrupts =
2898                 atomic_read(&ctrl_info->num_interrupts);
2899         ctrl_info->previous_heartbeat_count =
2900                 pqi_read_heartbeat_counter(ctrl_info);
2901
2902         ctrl_info->heartbeat_timer.expires =
2903                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2904         ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
2905         ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
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_disable_msix(ctrl_info);
3011                         sis_enable_intx(ctrl_info);
3012                         break;
3013                 case IRQ_MODE_NONE:
3014                         sis_disable_msix(ctrl_info);
3015                         break;
3016                 }
3017                 break;
3018         case IRQ_MODE_INTX:
3019                 switch (new_mode) {
3020                 case IRQ_MODE_MSIX:
3021                         pqi_configure_legacy_intx(ctrl_info, false);
3022                         sis_disable_intx(ctrl_info);
3023                         sis_enable_msix(ctrl_info);
3024                         break;
3025                 case IRQ_MODE_INTX:
3026                         break;
3027                 case IRQ_MODE_NONE:
3028                         pqi_configure_legacy_intx(ctrl_info, false);
3029                         sis_disable_intx(ctrl_info);
3030                         break;
3031                 }
3032                 break;
3033         case IRQ_MODE_NONE:
3034                 switch (new_mode) {
3035                 case IRQ_MODE_MSIX:
3036                         sis_enable_msix(ctrl_info);
3037                         break;
3038                 case IRQ_MODE_INTX:
3039                         pqi_configure_legacy_intx(ctrl_info, true);
3040                         sis_enable_intx(ctrl_info);
3041                         break;
3042                 case IRQ_MODE_NONE:
3043                         break;
3044                 }
3045                 break;
3046         }
3047
3048         ctrl_info->irq_mode = new_mode;
3049 }
3050
3051 #define PQI_LEGACY_INTX_PENDING         0x1
3052
3053 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3054 {
3055         bool valid_irq;
3056         u32 intx_status;
3057
3058         switch (ctrl_info->irq_mode) {
3059         case IRQ_MODE_MSIX:
3060                 valid_irq = true;
3061                 break;
3062         case IRQ_MODE_INTX:
3063                 intx_status =
3064                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3065                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3066                         valid_irq = true;
3067                 else
3068                         valid_irq = false;
3069                 break;
3070         case IRQ_MODE_NONE:
3071         default:
3072                 valid_irq = false;
3073                 break;
3074         }
3075
3076         return valid_irq;
3077 }
3078
3079 static irqreturn_t pqi_irq_handler(int irq, void *data)
3080 {
3081         struct pqi_ctrl_info *ctrl_info;
3082         struct pqi_queue_group *queue_group;
3083         unsigned int num_responses_handled;
3084
3085         queue_group = data;
3086         ctrl_info = queue_group->ctrl_info;
3087
3088         if (!pqi_is_valid_irq(ctrl_info))
3089                 return IRQ_NONE;
3090
3091         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3092
3093         if (irq == ctrl_info->event_irq)
3094                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3095
3096         if (num_responses_handled)
3097                 atomic_inc(&ctrl_info->num_interrupts);
3098
3099         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3100         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3101
3102         return IRQ_HANDLED;
3103 }
3104
3105 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3106 {
3107         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3108         int i;
3109         int rc;
3110
3111         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3112
3113         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3114                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3115                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3116                 if (rc) {
3117                         dev_err(&pci_dev->dev,
3118                                 "irq %u init failed with error %d\n",
3119                                 pci_irq_vector(pci_dev, i), rc);
3120                         return rc;
3121                 }
3122                 ctrl_info->num_msix_vectors_initialized++;
3123         }
3124
3125         return 0;
3126 }
3127
3128 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3129 {
3130         int i;
3131
3132         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3133                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3134                         &ctrl_info->queue_groups[i]);
3135
3136         ctrl_info->num_msix_vectors_initialized = 0;
3137 }
3138
3139 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3140 {
3141         int num_vectors_enabled;
3142
3143         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3144                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3145                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3146         if (num_vectors_enabled < 0) {
3147                 dev_err(&ctrl_info->pci_dev->dev,
3148                         "MSI-X init failed with error %d\n",
3149                         num_vectors_enabled);
3150                 return num_vectors_enabled;
3151         }
3152
3153         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3154         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3155         return 0;
3156 }
3157
3158 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3159 {
3160         if (ctrl_info->num_msix_vectors_enabled) {
3161                 pci_free_irq_vectors(ctrl_info->pci_dev);
3162                 ctrl_info->num_msix_vectors_enabled = 0;
3163         }
3164 }
3165
3166 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3167 {
3168         unsigned int i;
3169         size_t alloc_length;
3170         size_t element_array_length_per_iq;
3171         size_t element_array_length_per_oq;
3172         void *element_array;
3173         void *next_queue_index;
3174         void *aligned_pointer;
3175         unsigned int num_inbound_queues;
3176         unsigned int num_outbound_queues;
3177         unsigned int num_queue_indexes;
3178         struct pqi_queue_group *queue_group;
3179
3180         element_array_length_per_iq =
3181                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3182                 ctrl_info->num_elements_per_iq;
3183         element_array_length_per_oq =
3184                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3185                 ctrl_info->num_elements_per_oq;
3186         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3187         num_outbound_queues = ctrl_info->num_queue_groups;
3188         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3189
3190         aligned_pointer = NULL;
3191
3192         for (i = 0; i < num_inbound_queues; i++) {
3193                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3194                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3195                 aligned_pointer += element_array_length_per_iq;
3196         }
3197
3198         for (i = 0; i < num_outbound_queues; i++) {
3199                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3200                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3201                 aligned_pointer += element_array_length_per_oq;
3202         }
3203
3204         aligned_pointer = PTR_ALIGN(aligned_pointer,
3205                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3206         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3207                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3208
3209         for (i = 0; i < num_queue_indexes; i++) {
3210                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3211                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3212                 aligned_pointer += sizeof(pqi_index_t);
3213         }
3214
3215         alloc_length = (size_t)aligned_pointer +
3216                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3217
3218         alloc_length += PQI_EXTRA_SGL_MEMORY;
3219
3220         ctrl_info->queue_memory_base =
3221                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3222                         alloc_length,
3223                         &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3224
3225         if (!ctrl_info->queue_memory_base)
3226                 return -ENOMEM;
3227
3228         ctrl_info->queue_memory_length = alloc_length;
3229
3230         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3231                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3232
3233         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3234                 queue_group = &ctrl_info->queue_groups[i];
3235                 queue_group->iq_element_array[RAID_PATH] = element_array;
3236                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3237                         ctrl_info->queue_memory_base_dma_handle +
3238                                 (element_array - ctrl_info->queue_memory_base);
3239                 element_array += element_array_length_per_iq;
3240                 element_array = PTR_ALIGN(element_array,
3241                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3242                 queue_group->iq_element_array[AIO_PATH] = element_array;
3243                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3244                         ctrl_info->queue_memory_base_dma_handle +
3245                         (element_array - ctrl_info->queue_memory_base);
3246                 element_array += element_array_length_per_iq;
3247                 element_array = PTR_ALIGN(element_array,
3248                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3249         }
3250
3251         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3252                 queue_group = &ctrl_info->queue_groups[i];
3253                 queue_group->oq_element_array = element_array;
3254                 queue_group->oq_element_array_bus_addr =
3255                         ctrl_info->queue_memory_base_dma_handle +
3256                         (element_array - ctrl_info->queue_memory_base);
3257                 element_array += element_array_length_per_oq;
3258                 element_array = PTR_ALIGN(element_array,
3259                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3260         }
3261
3262         ctrl_info->event_queue.oq_element_array = element_array;
3263         ctrl_info->event_queue.oq_element_array_bus_addr =
3264                 ctrl_info->queue_memory_base_dma_handle +
3265                 (element_array - ctrl_info->queue_memory_base);
3266         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3267                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3268
3269         next_queue_index = PTR_ALIGN(element_array,
3270                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3271
3272         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3273                 queue_group = &ctrl_info->queue_groups[i];
3274                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3275                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3276                         ctrl_info->queue_memory_base_dma_handle +
3277                         (next_queue_index - ctrl_info->queue_memory_base);
3278                 next_queue_index += sizeof(pqi_index_t);
3279                 next_queue_index = PTR_ALIGN(next_queue_index,
3280                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3281                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3282                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3283                         ctrl_info->queue_memory_base_dma_handle +
3284                         (next_queue_index - ctrl_info->queue_memory_base);
3285                 next_queue_index += sizeof(pqi_index_t);
3286                 next_queue_index = PTR_ALIGN(next_queue_index,
3287                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3288                 queue_group->oq_pi = next_queue_index;
3289                 queue_group->oq_pi_bus_addr =
3290                         ctrl_info->queue_memory_base_dma_handle +
3291                         (next_queue_index - ctrl_info->queue_memory_base);
3292                 next_queue_index += sizeof(pqi_index_t);
3293                 next_queue_index = PTR_ALIGN(next_queue_index,
3294                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3295         }
3296
3297         ctrl_info->event_queue.oq_pi = next_queue_index;
3298         ctrl_info->event_queue.oq_pi_bus_addr =
3299                 ctrl_info->queue_memory_base_dma_handle +
3300                 (next_queue_index - ctrl_info->queue_memory_base);
3301
3302         return 0;
3303 }
3304
3305 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3306 {
3307         unsigned int i;
3308         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3309         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3310
3311         /*
3312          * Initialize the backpointers to the controller structure in
3313          * each operational queue group structure.
3314          */
3315         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3316                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3317
3318         /*
3319          * Assign IDs to all operational queues.  Note that the IDs
3320          * assigned to operational IQs are independent of the IDs
3321          * assigned to operational OQs.
3322          */
3323         ctrl_info->event_queue.oq_id = next_oq_id++;
3324         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3325                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3326                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3327                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3328         }
3329
3330         /*
3331          * Assign MSI-X table entry indexes to all queues.  Note that the
3332          * interrupt for the event queue is shared with the first queue group.
3333          */
3334         ctrl_info->event_queue.int_msg_num = 0;
3335         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3336                 ctrl_info->queue_groups[i].int_msg_num = i;
3337
3338         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3339                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3340                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3341                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3342                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3343         }
3344 }
3345
3346 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3347 {
3348         size_t alloc_length;
3349         struct pqi_admin_queues_aligned *admin_queues_aligned;
3350         struct pqi_admin_queues *admin_queues;
3351
3352         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3353                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3354
3355         ctrl_info->admin_queue_memory_base =
3356                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3357                         alloc_length,
3358                         &ctrl_info->admin_queue_memory_base_dma_handle,
3359                         GFP_KERNEL);
3360
3361         if (!ctrl_info->admin_queue_memory_base)
3362                 return -ENOMEM;
3363
3364         ctrl_info->admin_queue_memory_length = alloc_length;
3365
3366         admin_queues = &ctrl_info->admin_queues;
3367         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3368                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3369         admin_queues->iq_element_array =
3370                 &admin_queues_aligned->iq_element_array;
3371         admin_queues->oq_element_array =
3372                 &admin_queues_aligned->oq_element_array;
3373         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3374         admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3375
3376         admin_queues->iq_element_array_bus_addr =
3377                 ctrl_info->admin_queue_memory_base_dma_handle +
3378                 (admin_queues->iq_element_array -
3379                 ctrl_info->admin_queue_memory_base);
3380         admin_queues->oq_element_array_bus_addr =
3381                 ctrl_info->admin_queue_memory_base_dma_handle +
3382                 (admin_queues->oq_element_array -
3383                 ctrl_info->admin_queue_memory_base);
3384         admin_queues->iq_ci_bus_addr =
3385                 ctrl_info->admin_queue_memory_base_dma_handle +
3386                 ((void *)admin_queues->iq_ci -
3387                 ctrl_info->admin_queue_memory_base);
3388         admin_queues->oq_pi_bus_addr =
3389                 ctrl_info->admin_queue_memory_base_dma_handle +
3390                 ((void *)admin_queues->oq_pi -
3391                 ctrl_info->admin_queue_memory_base);
3392
3393         return 0;
3394 }
3395
3396 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
3397 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3398
3399 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3400 {
3401         struct pqi_device_registers __iomem *pqi_registers;
3402         struct pqi_admin_queues *admin_queues;
3403         unsigned long timeout;
3404         u8 status;
3405         u32 reg;
3406
3407         pqi_registers = ctrl_info->pqi_registers;
3408         admin_queues = &ctrl_info->admin_queues;
3409
3410         writeq((u64)admin_queues->iq_element_array_bus_addr,
3411                 &pqi_registers->admin_iq_element_array_addr);
3412         writeq((u64)admin_queues->oq_element_array_bus_addr,
3413                 &pqi_registers->admin_oq_element_array_addr);
3414         writeq((u64)admin_queues->iq_ci_bus_addr,
3415                 &pqi_registers->admin_iq_ci_addr);
3416         writeq((u64)admin_queues->oq_pi_bus_addr,
3417                 &pqi_registers->admin_oq_pi_addr);
3418
3419         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3420                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3421                 (admin_queues->int_msg_num << 16);
3422         writel(reg, &pqi_registers->admin_iq_num_elements);
3423         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3424                 &pqi_registers->function_and_status_code);
3425
3426         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3427         while (1) {
3428                 status = readb(&pqi_registers->function_and_status_code);
3429                 if (status == PQI_STATUS_IDLE)
3430                         break;
3431                 if (time_after(jiffies, timeout))
3432                         return -ETIMEDOUT;
3433                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3434         }
3435
3436         /*
3437          * The offset registers are not initialized to the correct
3438          * offsets until *after* the create admin queue pair command
3439          * completes successfully.
3440          */
3441         admin_queues->iq_pi = ctrl_info->iomem_base +
3442                 PQI_DEVICE_REGISTERS_OFFSET +
3443                 readq(&pqi_registers->admin_iq_pi_offset);
3444         admin_queues->oq_ci = ctrl_info->iomem_base +
3445                 PQI_DEVICE_REGISTERS_OFFSET +
3446                 readq(&pqi_registers->admin_oq_ci_offset);
3447
3448         return 0;
3449 }
3450
3451 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3452         struct pqi_general_admin_request *request)
3453 {
3454         struct pqi_admin_queues *admin_queues;
3455         void *next_element;
3456         pqi_index_t iq_pi;
3457
3458         admin_queues = &ctrl_info->admin_queues;
3459         iq_pi = admin_queues->iq_pi_copy;
3460
3461         next_element = admin_queues->iq_element_array +
3462                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3463
3464         memcpy(next_element, request, sizeof(*request));
3465
3466         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3467         admin_queues->iq_pi_copy = iq_pi;
3468
3469         /*
3470          * This write notifies the controller that an IU is available to be
3471          * processed.
3472          */
3473         writel(iq_pi, admin_queues->iq_pi);
3474 }
3475
3476 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3477
3478 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3479         struct pqi_general_admin_response *response)
3480 {
3481         struct pqi_admin_queues *admin_queues;
3482         pqi_index_t oq_pi;
3483         pqi_index_t oq_ci;
3484         unsigned long timeout;
3485
3486         admin_queues = &ctrl_info->admin_queues;
3487         oq_ci = admin_queues->oq_ci_copy;
3488
3489         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
3490
3491         while (1) {
3492                 oq_pi = *admin_queues->oq_pi;
3493                 if (oq_pi != oq_ci)
3494                         break;
3495                 if (time_after(jiffies, timeout)) {
3496                         dev_err(&ctrl_info->pci_dev->dev,
3497                                 "timed out waiting for admin response\n");
3498                         return -ETIMEDOUT;
3499                 }
3500                 if (!sis_is_firmware_running(ctrl_info))
3501                         return -ENXIO;
3502                 usleep_range(1000, 2000);
3503         }
3504
3505         memcpy(response, admin_queues->oq_element_array +
3506                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3507
3508         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3509         admin_queues->oq_ci_copy = oq_ci;
3510         writel(oq_ci, admin_queues->oq_ci);
3511
3512         return 0;
3513 }
3514
3515 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3516         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3517         struct pqi_io_request *io_request)
3518 {
3519         struct pqi_io_request *next;
3520         void *next_element;
3521         pqi_index_t iq_pi;
3522         pqi_index_t iq_ci;
3523         size_t iu_length;
3524         unsigned long flags;
3525         unsigned int num_elements_needed;
3526         unsigned int num_elements_to_end_of_queue;
3527         size_t copy_count;
3528         struct pqi_iu_header *request;
3529
3530         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3531
3532         if (io_request) {
3533                 io_request->queue_group = queue_group;
3534                 list_add_tail(&io_request->request_list_entry,
3535                         &queue_group->request_list[path]);
3536         }
3537
3538         iq_pi = queue_group->iq_pi_copy[path];
3539
3540         list_for_each_entry_safe(io_request, next,
3541                 &queue_group->request_list[path], request_list_entry) {
3542
3543                 request = io_request->iu;
3544
3545                 iu_length = get_unaligned_le16(&request->iu_length) +
3546                         PQI_REQUEST_HEADER_LENGTH;
3547                 num_elements_needed =
3548                         DIV_ROUND_UP(iu_length,
3549                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3550
3551                 iq_ci = *queue_group->iq_ci[path];
3552
3553                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3554                         ctrl_info->num_elements_per_iq))
3555                         break;
3556
3557                 put_unaligned_le16(queue_group->oq_id,
3558                         &request->response_queue_id);
3559
3560                 next_element = queue_group->iq_element_array[path] +
3561                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3562
3563                 num_elements_to_end_of_queue =
3564                         ctrl_info->num_elements_per_iq - iq_pi;
3565
3566                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3567                         memcpy(next_element, request, iu_length);
3568                 } else {
3569                         copy_count = num_elements_to_end_of_queue *
3570                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3571                         memcpy(next_element, request, copy_count);
3572                         memcpy(queue_group->iq_element_array[path],
3573                                 (u8 *)request + copy_count,
3574                                 iu_length - copy_count);
3575                 }
3576
3577                 iq_pi = (iq_pi + num_elements_needed) %
3578                         ctrl_info->num_elements_per_iq;
3579
3580                 list_del(&io_request->request_list_entry);
3581         }
3582
3583         if (iq_pi != queue_group->iq_pi_copy[path]) {
3584                 queue_group->iq_pi_copy[path] = iq_pi;
3585                 /*
3586                  * This write notifies the controller that one or more IUs are
3587                  * available to be processed.
3588                  */
3589                 writel(iq_pi, queue_group->iq_pi[path]);
3590         }
3591
3592         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3593 }
3594
3595 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3596
3597 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3598         struct completion *wait)
3599 {
3600         int rc;
3601
3602         while (1) {
3603                 if (wait_for_completion_io_timeout(wait,
3604                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
3605                         rc = 0;
3606                         break;
3607                 }
3608
3609                 pqi_check_ctrl_health(ctrl_info);
3610                 if (pqi_ctrl_offline(ctrl_info)) {
3611                         rc = -ENXIO;
3612                         break;
3613                 }
3614         }
3615
3616         return rc;
3617 }
3618
3619 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3620         void *context)
3621 {
3622         struct completion *waiting = context;
3623
3624         complete(waiting);
3625 }
3626
3627 static int pqi_submit_raid_request_synchronous_with_io_request(
3628         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3629         unsigned long timeout_msecs)
3630 {
3631         int rc = 0;
3632         DECLARE_COMPLETION_ONSTACK(wait);
3633
3634         io_request->io_complete_callback = pqi_raid_synchronous_complete;
3635         io_request->context = &wait;
3636
3637         pqi_start_io(ctrl_info,
3638                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3639                 io_request);
3640
3641         if (timeout_msecs == NO_TIMEOUT) {
3642                 pqi_wait_for_completion_io(ctrl_info, &wait);
3643         } else {
3644                 if (!wait_for_completion_io_timeout(&wait,
3645                         msecs_to_jiffies(timeout_msecs))) {
3646                         dev_warn(&ctrl_info->pci_dev->dev,
3647                                 "command timed out\n");
3648                         rc = -ETIMEDOUT;
3649                 }
3650         }
3651
3652         return rc;
3653 }
3654
3655 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3656         struct pqi_iu_header *request, unsigned int flags,
3657         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3658 {
3659         int rc;
3660         struct pqi_io_request *io_request;
3661         unsigned long start_jiffies;
3662         unsigned long msecs_blocked;
3663         size_t iu_length;
3664
3665         /*
3666          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3667          * are mutually exclusive.
3668          */
3669
3670         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3671                 if (down_interruptible(&ctrl_info->sync_request_sem))
3672                         return -ERESTARTSYS;
3673         } else {
3674                 if (timeout_msecs == NO_TIMEOUT) {
3675                         down(&ctrl_info->sync_request_sem);
3676                 } else {
3677                         start_jiffies = jiffies;
3678                         if (down_timeout(&ctrl_info->sync_request_sem,
3679                                 msecs_to_jiffies(timeout_msecs)))
3680                                 return -ETIMEDOUT;
3681                         msecs_blocked =
3682                                 jiffies_to_msecs(jiffies - start_jiffies);
3683                         if (msecs_blocked >= timeout_msecs)
3684                                 return -ETIMEDOUT;
3685                         timeout_msecs -= msecs_blocked;
3686                 }
3687         }
3688
3689         pqi_ctrl_busy(ctrl_info);
3690         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
3691         if (timeout_msecs == 0) {
3692                 rc = -ETIMEDOUT;
3693                 goto out;
3694         }
3695
3696         if (pqi_ctrl_offline(ctrl_info)) {
3697                 rc = -ENXIO;
3698                 goto out;
3699         }
3700
3701         io_request = pqi_alloc_io_request(ctrl_info);
3702
3703         put_unaligned_le16(io_request->index,
3704                 &(((struct pqi_raid_path_request *)request)->request_id));
3705
3706         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3707                 ((struct pqi_raid_path_request *)request)->error_index =
3708                         ((struct pqi_raid_path_request *)request)->request_id;
3709
3710         iu_length = get_unaligned_le16(&request->iu_length) +
3711                 PQI_REQUEST_HEADER_LENGTH;
3712         memcpy(io_request->iu, request, iu_length);
3713
3714         rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3715                 io_request, timeout_msecs);
3716
3717         if (error_info) {
3718                 if (io_request->error_info)
3719                         memcpy(error_info, io_request->error_info,
3720                                 sizeof(*error_info));
3721                 else
3722                         memset(error_info, 0, sizeof(*error_info));
3723         } else if (rc == 0 && io_request->error_info) {
3724                 u8 scsi_status;
3725                 struct pqi_raid_error_info *raid_error_info;
3726
3727                 raid_error_info = io_request->error_info;
3728                 scsi_status = raid_error_info->status;
3729
3730                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3731                         raid_error_info->data_out_result ==
3732                         PQI_DATA_IN_OUT_UNDERFLOW)
3733                         scsi_status = SAM_STAT_GOOD;
3734
3735                 if (scsi_status != SAM_STAT_GOOD)
3736                         rc = -EIO;
3737         }
3738
3739         pqi_free_io_request(io_request);
3740
3741 out:
3742         pqi_ctrl_unbusy(ctrl_info);
3743         up(&ctrl_info->sync_request_sem);
3744
3745         return rc;
3746 }
3747
3748 static int pqi_validate_admin_response(
3749         struct pqi_general_admin_response *response, u8 expected_function_code)
3750 {
3751         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3752                 return -EINVAL;
3753
3754         if (get_unaligned_le16(&response->header.iu_length) !=
3755                 PQI_GENERAL_ADMIN_IU_LENGTH)
3756                 return -EINVAL;
3757
3758         if (response->function_code != expected_function_code)
3759                 return -EINVAL;
3760
3761         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3762                 return -EINVAL;
3763
3764         return 0;
3765 }
3766
3767 static int pqi_submit_admin_request_synchronous(
3768         struct pqi_ctrl_info *ctrl_info,
3769         struct pqi_general_admin_request *request,
3770         struct pqi_general_admin_response *response)
3771 {
3772         int rc;
3773
3774         pqi_submit_admin_request(ctrl_info, request);
3775
3776         rc = pqi_poll_for_admin_response(ctrl_info, response);
3777
3778         if (rc == 0)
3779                 rc = pqi_validate_admin_response(response,
3780                         request->function_code);
3781
3782         return rc;
3783 }
3784
3785 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3786 {
3787         int rc;
3788         struct pqi_general_admin_request request;
3789         struct pqi_general_admin_response response;
3790         struct pqi_device_capability *capability;
3791         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3792
3793         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3794         if (!capability)
3795                 return -ENOMEM;
3796
3797         memset(&request, 0, sizeof(request));
3798
3799         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3800         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3801                 &request.header.iu_length);
3802         request.function_code =
3803                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3804         put_unaligned_le32(sizeof(*capability),
3805                 &request.data.report_device_capability.buffer_length);
3806
3807         rc = pqi_map_single(ctrl_info->pci_dev,
3808                 &request.data.report_device_capability.sg_descriptor,
3809                 capability, sizeof(*capability),
3810                 PCI_DMA_FROMDEVICE);
3811         if (rc)
3812                 goto out;
3813
3814         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3815                 &response);
3816
3817         pqi_pci_unmap(ctrl_info->pci_dev,
3818                 &request.data.report_device_capability.sg_descriptor, 1,
3819                 PCI_DMA_FROMDEVICE);
3820
3821         if (rc)
3822                 goto out;
3823
3824         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3825                 rc = -EIO;
3826                 goto out;
3827         }
3828
3829         ctrl_info->max_inbound_queues =
3830                 get_unaligned_le16(&capability->max_inbound_queues);
3831         ctrl_info->max_elements_per_iq =
3832                 get_unaligned_le16(&capability->max_elements_per_iq);
3833         ctrl_info->max_iq_element_length =
3834                 get_unaligned_le16(&capability->max_iq_element_length)
3835                 * 16;
3836         ctrl_info->max_outbound_queues =
3837                 get_unaligned_le16(&capability->max_outbound_queues);
3838         ctrl_info->max_elements_per_oq =
3839                 get_unaligned_le16(&capability->max_elements_per_oq);
3840         ctrl_info->max_oq_element_length =
3841                 get_unaligned_le16(&capability->max_oq_element_length)
3842                 * 16;
3843
3844         sop_iu_layer_descriptor =
3845                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3846
3847         ctrl_info->max_inbound_iu_length_per_firmware =
3848                 get_unaligned_le16(
3849                         &sop_iu_layer_descriptor->max_inbound_iu_length);
3850         ctrl_info->inbound_spanning_supported =
3851                 sop_iu_layer_descriptor->inbound_spanning_supported;
3852         ctrl_info->outbound_spanning_supported =
3853                 sop_iu_layer_descriptor->outbound_spanning_supported;
3854
3855 out:
3856         kfree(capability);
3857
3858         return rc;
3859 }
3860
3861 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3862 {
3863         if (ctrl_info->max_iq_element_length <
3864                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3865                 dev_err(&ctrl_info->pci_dev->dev,
3866                         "max. inbound queue element length of %d is less than the required length of %d\n",
3867                         ctrl_info->max_iq_element_length,
3868                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3869                 return -EINVAL;
3870         }
3871
3872         if (ctrl_info->max_oq_element_length <
3873                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3874                 dev_err(&ctrl_info->pci_dev->dev,
3875                         "max. outbound queue element length of %d is less than the required length of %d\n",
3876                         ctrl_info->max_oq_element_length,
3877                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3878                 return -EINVAL;
3879         }
3880
3881         if (ctrl_info->max_inbound_iu_length_per_firmware <
3882                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3883                 dev_err(&ctrl_info->pci_dev->dev,
3884                         "max. inbound IU length of %u is less than the min. required length of %d\n",
3885                         ctrl_info->max_inbound_iu_length_per_firmware,
3886                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3887                 return -EINVAL;
3888         }
3889
3890         if (!ctrl_info->inbound_spanning_supported) {
3891                 dev_err(&ctrl_info->pci_dev->dev,
3892                         "the controller does not support inbound spanning\n");
3893                 return -EINVAL;
3894         }
3895
3896         if (ctrl_info->outbound_spanning_supported) {
3897                 dev_err(&ctrl_info->pci_dev->dev,
3898                         "the controller supports outbound spanning but this driver does not\n");
3899                 return -EINVAL;
3900         }
3901
3902         return 0;
3903 }
3904
3905 static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
3906         bool inbound_queue, u16 queue_id)
3907 {
3908         struct pqi_general_admin_request request;
3909         struct pqi_general_admin_response response;
3910
3911         memset(&request, 0, sizeof(request));
3912         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3913         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3914                 &request.header.iu_length);
3915         if (inbound_queue)
3916                 request.function_code =
3917                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
3918         else
3919                 request.function_code =
3920                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
3921         put_unaligned_le16(queue_id,
3922                 &request.data.delete_operational_queue.queue_id);
3923
3924         return pqi_submit_admin_request_synchronous(ctrl_info, &request,
3925                 &response);
3926 }
3927
3928 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3929 {
3930         int rc;
3931         struct pqi_event_queue *event_queue;
3932         struct pqi_general_admin_request request;
3933         struct pqi_general_admin_response response;
3934
3935         event_queue = &ctrl_info->event_queue;
3936
3937         /*
3938          * Create OQ (Outbound Queue - device to host queue) to dedicate
3939          * to events.
3940          */
3941         memset(&request, 0, sizeof(request));
3942         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3943         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3944                 &request.header.iu_length);
3945         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3946         put_unaligned_le16(event_queue->oq_id,
3947                 &request.data.create_operational_oq.queue_id);
3948         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3949                 &request.data.create_operational_oq.element_array_addr);
3950         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3951                 &request.data.create_operational_oq.pi_addr);
3952         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3953                 &request.data.create_operational_oq.num_elements);
3954         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3955                 &request.data.create_operational_oq.element_length);
3956         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3957         put_unaligned_le16(event_queue->int_msg_num,
3958                 &request.data.create_operational_oq.int_msg_num);
3959
3960         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3961                 &response);
3962         if (rc)
3963                 return rc;
3964
3965         event_queue->oq_ci = ctrl_info->iomem_base +
3966                 PQI_DEVICE_REGISTERS_OFFSET +
3967                 get_unaligned_le64(
3968                         &response.data.create_operational_oq.oq_ci_offset);
3969
3970         return 0;
3971 }
3972
3973 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
3974         unsigned int group_number)
3975 {
3976         int rc;
3977         struct pqi_queue_group *queue_group;
3978         struct pqi_general_admin_request request;
3979         struct pqi_general_admin_response response;
3980
3981         queue_group = &ctrl_info->queue_groups[group_number];
3982
3983         /*
3984          * Create IQ (Inbound Queue - host to device queue) for
3985          * RAID path.
3986          */
3987         memset(&request, 0, sizeof(request));
3988         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3989         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3990                 &request.header.iu_length);
3991         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3992         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
3993                 &request.data.create_operational_iq.queue_id);
3994         put_unaligned_le64(
3995                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
3996                 &request.data.create_operational_iq.element_array_addr);
3997         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
3998                 &request.data.create_operational_iq.ci_addr);
3999         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4000                 &request.data.create_operational_iq.num_elements);
4001         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4002                 &request.data.create_operational_iq.element_length);
4003         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4004
4005         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4006                 &response);
4007         if (rc) {
4008                 dev_err(&ctrl_info->pci_dev->dev,
4009                         "error creating inbound RAID queue\n");
4010                 return rc;
4011         }
4012
4013         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4014                 PQI_DEVICE_REGISTERS_OFFSET +
4015                 get_unaligned_le64(
4016                         &response.data.create_operational_iq.iq_pi_offset);
4017
4018         /*
4019          * Create IQ (Inbound Queue - host to device queue) for
4020          * Advanced I/O (AIO) path.
4021          */
4022         memset(&request, 0, sizeof(request));
4023         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4024         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4025                 &request.header.iu_length);
4026         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4027         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4028                 &request.data.create_operational_iq.queue_id);
4029         put_unaligned_le64((u64)queue_group->
4030                 iq_element_array_bus_addr[AIO_PATH],
4031                 &request.data.create_operational_iq.element_array_addr);
4032         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4033                 &request.data.create_operational_iq.ci_addr);
4034         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4035                 &request.data.create_operational_iq.num_elements);
4036         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4037                 &request.data.create_operational_iq.element_length);
4038         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4039
4040         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4041                 &response);
4042         if (rc) {
4043                 dev_err(&ctrl_info->pci_dev->dev,
4044                         "error creating inbound AIO queue\n");
4045                 goto delete_inbound_queue_raid;
4046         }
4047
4048         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4049                 PQI_DEVICE_REGISTERS_OFFSET +
4050                 get_unaligned_le64(
4051                         &response.data.create_operational_iq.iq_pi_offset);
4052
4053         /*
4054          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4055          * assumed to be for RAID path I/O unless we change the queue's
4056          * property.
4057          */
4058         memset(&request, 0, sizeof(request));
4059         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4060         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4061                 &request.header.iu_length);
4062         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4063         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4064                 &request.data.change_operational_iq_properties.queue_id);
4065         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4066                 &request.data.change_operational_iq_properties.vendor_specific);
4067
4068         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4069                 &response);
4070         if (rc) {
4071                 dev_err(&ctrl_info->pci_dev->dev,
4072                         "error changing queue property\n");
4073                 goto delete_inbound_queue_aio;
4074         }
4075
4076         /*
4077          * Create OQ (Outbound Queue - device to host queue).
4078          */
4079         memset(&request, 0, sizeof(request));
4080         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4081         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4082                 &request.header.iu_length);
4083         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4084         put_unaligned_le16(queue_group->oq_id,
4085                 &request.data.create_operational_oq.queue_id);
4086         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4087                 &request.data.create_operational_oq.element_array_addr);
4088         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4089                 &request.data.create_operational_oq.pi_addr);
4090         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4091                 &request.data.create_operational_oq.num_elements);
4092         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4093                 &request.data.create_operational_oq.element_length);
4094         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4095         put_unaligned_le16(queue_group->int_msg_num,
4096                 &request.data.create_operational_oq.int_msg_num);
4097
4098         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4099                 &response);
4100         if (rc) {
4101                 dev_err(&ctrl_info->pci_dev->dev,
4102                         "error creating outbound queue\n");
4103                 goto delete_inbound_queue_aio;
4104         }
4105
4106         queue_group->oq_ci = ctrl_info->iomem_base +
4107                 PQI_DEVICE_REGISTERS_OFFSET +
4108                 get_unaligned_le64(
4109                         &response.data.create_operational_oq.oq_ci_offset);
4110
4111         return 0;
4112
4113 delete_inbound_queue_aio:
4114         pqi_delete_operational_queue(ctrl_info, true,
4115                 queue_group->iq_id[AIO_PATH]);
4116
4117 delete_inbound_queue_raid:
4118         pqi_delete_operational_queue(ctrl_info, true,
4119                 queue_group->iq_id[RAID_PATH]);
4120
4121         return rc;
4122 }
4123
4124 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4125 {
4126         int rc;
4127         unsigned int i;
4128
4129         rc = pqi_create_event_queue(ctrl_info);
4130         if (rc) {
4131                 dev_err(&ctrl_info->pci_dev->dev,
4132                         "error creating event queue\n");
4133                 return rc;
4134         }
4135
4136         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4137                 rc = pqi_create_queue_group(ctrl_info, i);
4138                 if (rc) {
4139                         dev_err(&ctrl_info->pci_dev->dev,
4140                                 "error creating queue group number %u/%u\n",
4141                                 i, ctrl_info->num_queue_groups);
4142                         return rc;
4143                 }
4144         }
4145
4146         return 0;
4147 }
4148
4149 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4150         (offsetof(struct pqi_event_config, descriptors) + \
4151         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4152
4153 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4154         bool enable_events)
4155 {
4156         int rc;
4157         unsigned int i;
4158         struct pqi_event_config *event_config;
4159         struct pqi_event_descriptor *event_descriptor;
4160         struct pqi_general_management_request request;
4161
4162         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4163                 GFP_KERNEL);
4164         if (!event_config)
4165                 return -ENOMEM;
4166
4167         memset(&request, 0, sizeof(request));
4168
4169         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4170         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4171                 data.report_event_configuration.sg_descriptors[1]) -
4172                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4173         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4174                 &request.data.report_event_configuration.buffer_length);
4175
4176         rc = pqi_map_single(ctrl_info->pci_dev,
4177                 request.data.report_event_configuration.sg_descriptors,
4178                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4179                 PCI_DMA_FROMDEVICE);
4180         if (rc)
4181                 goto out;
4182
4183         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4184                 0, NULL, NO_TIMEOUT);
4185
4186         pqi_pci_unmap(ctrl_info->pci_dev,
4187                 request.data.report_event_configuration.sg_descriptors, 1,
4188                 PCI_DMA_FROMDEVICE);
4189
4190         if (rc)
4191                 goto out;
4192
4193         for (i = 0; i < event_config->num_event_descriptors; i++) {
4194                 event_descriptor = &event_config->descriptors[i];
4195                 if (enable_events &&
4196                         pqi_is_supported_event(event_descriptor->event_type))
4197                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4198                                         &event_descriptor->oq_id);
4199                 else
4200                         put_unaligned_le16(0, &event_descriptor->oq_id);
4201         }
4202
4203         memset(&request, 0, sizeof(request));
4204
4205         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4206         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4207                 data.report_event_configuration.sg_descriptors[1]) -
4208                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4209         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4210                 &request.data.report_event_configuration.buffer_length);
4211
4212         rc = pqi_map_single(ctrl_info->pci_dev,
4213                 request.data.report_event_configuration.sg_descriptors,
4214                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4215                 PCI_DMA_TODEVICE);
4216         if (rc)
4217                 goto out;
4218
4219         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4220                 NULL, NO_TIMEOUT);
4221
4222         pqi_pci_unmap(ctrl_info->pci_dev,
4223                 request.data.report_event_configuration.sg_descriptors, 1,
4224                 PCI_DMA_TODEVICE);
4225
4226 out:
4227         kfree(event_config);
4228
4229         return rc;
4230 }
4231
4232 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4233 {
4234         return pqi_configure_events(ctrl_info, true);
4235 }
4236
4237 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4238 {
4239         return pqi_configure_events(ctrl_info, false);
4240 }
4241
4242 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4243 {
4244         unsigned int i;
4245         struct device *dev;
4246         size_t sg_chain_buffer_length;
4247         struct pqi_io_request *io_request;
4248
4249         if (!ctrl_info->io_request_pool)
4250                 return;
4251
4252         dev = &ctrl_info->pci_dev->dev;
4253         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4254         io_request = ctrl_info->io_request_pool;
4255
4256         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4257                 kfree(io_request->iu);
4258                 if (!io_request->sg_chain_buffer)
4259                         break;
4260                 dma_free_coherent(dev, sg_chain_buffer_length,
4261                         io_request->sg_chain_buffer,
4262                         io_request->sg_chain_buffer_dma_handle);
4263                 io_request++;
4264         }
4265
4266         kfree(ctrl_info->io_request_pool);
4267         ctrl_info->io_request_pool = NULL;
4268 }
4269
4270 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4271 {
4272         ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4273                 ctrl_info->error_buffer_length,
4274                 &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4275
4276         if (!ctrl_info->error_buffer)
4277                 return -ENOMEM;
4278
4279         return 0;
4280 }
4281
4282 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4283 {
4284         unsigned int i;
4285         void *sg_chain_buffer;
4286         size_t sg_chain_buffer_length;
4287         dma_addr_t sg_chain_buffer_dma_handle;
4288         struct device *dev;
4289         struct pqi_io_request *io_request;
4290
4291         ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4292                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4293
4294         if (!ctrl_info->io_request_pool) {
4295                 dev_err(&ctrl_info->pci_dev->dev,
4296                         "failed to allocate I/O request pool\n");
4297                 goto error;
4298         }
4299
4300         dev = &ctrl_info->pci_dev->dev;
4301         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4302         io_request = ctrl_info->io_request_pool;
4303
4304         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4305                 io_request->iu =
4306                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4307
4308                 if (!io_request->iu) {
4309                         dev_err(&ctrl_info->pci_dev->dev,
4310                                 "failed to allocate IU buffers\n");
4311                         goto error;
4312                 }
4313
4314                 sg_chain_buffer = dma_alloc_coherent(dev,
4315                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4316                         GFP_KERNEL);
4317
4318                 if (!sg_chain_buffer) {
4319                         dev_err(&ctrl_info->pci_dev->dev,
4320                                 "failed to allocate PQI scatter-gather chain buffers\n");
4321                         goto error;
4322                 }
4323
4324                 io_request->index = i;
4325                 io_request->sg_chain_buffer = sg_chain_buffer;
4326                 io_request->sg_chain_buffer_dma_handle =
4327                         sg_chain_buffer_dma_handle;
4328                 io_request++;
4329         }
4330
4331         return 0;
4332
4333 error:
4334         pqi_free_all_io_requests(ctrl_info);
4335
4336         return -ENOMEM;
4337 }
4338
4339 /*
4340  * Calculate required resources that are sized based on max. outstanding
4341  * requests and max. transfer size.
4342  */
4343
4344 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4345 {
4346         u32 max_transfer_size;
4347         u32 max_sg_entries;
4348
4349         ctrl_info->scsi_ml_can_queue =
4350                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4351         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4352
4353         ctrl_info->error_buffer_length =
4354                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4355
4356         if (reset_devices)
4357                 max_transfer_size = min(ctrl_info->max_transfer_size,
4358                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4359         else
4360                 max_transfer_size = min(ctrl_info->max_transfer_size,
4361                         PQI_MAX_TRANSFER_SIZE);
4362
4363         max_sg_entries = max_transfer_size / PAGE_SIZE;
4364
4365         /* +1 to cover when the buffer is not page-aligned. */
4366         max_sg_entries++;
4367
4368         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4369
4370         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4371
4372         ctrl_info->sg_chain_buffer_length =
4373                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4374                 PQI_EXTRA_SGL_MEMORY;
4375         ctrl_info->sg_tablesize = max_sg_entries;
4376         ctrl_info->max_sectors = max_transfer_size / 512;
4377 }
4378
4379 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4380 {
4381         int num_queue_groups;
4382         u16 num_elements_per_iq;
4383         u16 num_elements_per_oq;
4384
4385         if (reset_devices) {
4386                 num_queue_groups = 1;
4387         } else {
4388                 int num_cpus;
4389                 int max_queue_groups;
4390
4391                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4392                         ctrl_info->max_outbound_queues - 1);
4393                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4394
4395                 num_cpus = num_online_cpus();
4396                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4397                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4398         }
4399
4400         ctrl_info->num_queue_groups = num_queue_groups;
4401         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4402
4403         /*
4404          * Make sure that the max. inbound IU length is an even multiple
4405          * of our inbound element length.
4406          */
4407         ctrl_info->max_inbound_iu_length =
4408                 (ctrl_info->max_inbound_iu_length_per_firmware /
4409                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4410                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4411
4412         num_elements_per_iq =
4413                 (ctrl_info->max_inbound_iu_length /
4414                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4415
4416         /* Add one because one element in each queue is unusable. */
4417         num_elements_per_iq++;
4418
4419         num_elements_per_iq = min(num_elements_per_iq,
4420                 ctrl_info->max_elements_per_iq);
4421
4422         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4423         num_elements_per_oq = min(num_elements_per_oq,
4424                 ctrl_info->max_elements_per_oq);
4425
4426         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4427         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4428
4429         ctrl_info->max_sg_per_iu =
4430                 ((ctrl_info->max_inbound_iu_length -
4431                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4432                 sizeof(struct pqi_sg_descriptor)) +
4433                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4434 }
4435
4436 static inline void pqi_set_sg_descriptor(
4437         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4438 {
4439         u64 address = (u64)sg_dma_address(sg);
4440         unsigned int length = sg_dma_len(sg);
4441
4442         put_unaligned_le64(address, &sg_descriptor->address);
4443         put_unaligned_le32(length, &sg_descriptor->length);
4444         put_unaligned_le32(0, &sg_descriptor->flags);
4445 }
4446
4447 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4448         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4449         struct pqi_io_request *io_request)
4450 {
4451         int i;
4452         u16 iu_length;
4453         int sg_count;
4454         bool chained;
4455         unsigned int num_sg_in_iu;
4456         unsigned int max_sg_per_iu;
4457         struct scatterlist *sg;
4458         struct pqi_sg_descriptor *sg_descriptor;
4459
4460         sg_count = scsi_dma_map(scmd);
4461         if (sg_count < 0)
4462                 return sg_count;
4463
4464         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4465                 PQI_REQUEST_HEADER_LENGTH;
4466
4467         if (sg_count == 0)
4468                 goto out;
4469
4470         sg = scsi_sglist(scmd);
4471         sg_descriptor = request->sg_descriptors;
4472         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4473         chained = false;
4474         num_sg_in_iu = 0;
4475         i = 0;
4476
4477         while (1) {
4478                 pqi_set_sg_descriptor(sg_descriptor, sg);
4479                 if (!chained)
4480                         num_sg_in_iu++;
4481                 i++;
4482                 if (i == sg_count)
4483                         break;
4484                 sg_descriptor++;
4485                 if (i == max_sg_per_iu) {
4486                         put_unaligned_le64(
4487                                 (u64)io_request->sg_chain_buffer_dma_handle,
4488                                 &sg_descriptor->address);
4489                         put_unaligned_le32((sg_count - num_sg_in_iu)
4490                                 * sizeof(*sg_descriptor),
4491                                 &sg_descriptor->length);
4492                         put_unaligned_le32(CISS_SG_CHAIN,
4493                                 &sg_descriptor->flags);
4494                         chained = true;
4495                         num_sg_in_iu++;
4496                         sg_descriptor = io_request->sg_chain_buffer;
4497                 }
4498                 sg = sg_next(sg);
4499         }
4500
4501         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4502         request->partial = chained;
4503         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4504
4505 out:
4506         put_unaligned_le16(iu_length, &request->header.iu_length);
4507
4508         return 0;
4509 }
4510
4511 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4512         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4513         struct pqi_io_request *io_request)
4514 {
4515         int i;
4516         u16 iu_length;
4517         int sg_count;
4518         bool chained;
4519         unsigned int num_sg_in_iu;
4520         unsigned int max_sg_per_iu;
4521         struct scatterlist *sg;
4522         struct pqi_sg_descriptor *sg_descriptor;
4523
4524         sg_count = scsi_dma_map(scmd);
4525         if (sg_count < 0)
4526                 return sg_count;
4527
4528         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4529                 PQI_REQUEST_HEADER_LENGTH;
4530         num_sg_in_iu = 0;
4531
4532         if (sg_count == 0)
4533                 goto out;
4534
4535         sg = scsi_sglist(scmd);
4536         sg_descriptor = request->sg_descriptors;
4537         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4538         chained = false;
4539         i = 0;
4540
4541         while (1) {
4542                 pqi_set_sg_descriptor(sg_descriptor, sg);
4543                 if (!chained)
4544                         num_sg_in_iu++;
4545                 i++;
4546                 if (i == sg_count)
4547                         break;
4548                 sg_descriptor++;
4549                 if (i == max_sg_per_iu) {
4550                         put_unaligned_le64(
4551                                 (u64)io_request->sg_chain_buffer_dma_handle,
4552                                 &sg_descriptor->address);
4553                         put_unaligned_le32((sg_count - num_sg_in_iu)
4554                                 * sizeof(*sg_descriptor),
4555                                 &sg_descriptor->length);
4556                         put_unaligned_le32(CISS_SG_CHAIN,
4557                                 &sg_descriptor->flags);
4558                         chained = true;
4559                         num_sg_in_iu++;
4560                         sg_descriptor = io_request->sg_chain_buffer;
4561                 }
4562                 sg = sg_next(sg);
4563         }
4564
4565         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4566         request->partial = chained;
4567         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4568
4569 out:
4570         put_unaligned_le16(iu_length, &request->header.iu_length);
4571         request->num_sg_descriptors = num_sg_in_iu;
4572
4573         return 0;
4574 }
4575
4576 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4577         void *context)
4578 {
4579         struct scsi_cmnd *scmd;
4580
4581         scmd = io_request->scmd;
4582         pqi_free_io_request(io_request);
4583         scsi_dma_unmap(scmd);
4584         pqi_scsi_done(scmd);
4585 }
4586
4587 static int pqi_raid_submit_scsi_cmd_with_io_request(
4588         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4589         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4590         struct pqi_queue_group *queue_group)
4591 {
4592         int rc;
4593         size_t cdb_length;
4594         struct pqi_raid_path_request *request;
4595
4596         io_request->io_complete_callback = pqi_raid_io_complete;
4597         io_request->scmd = scmd;
4598
4599         request = io_request->iu;
4600         memset(request, 0,
4601                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4602
4603         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4604         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4605         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4606         put_unaligned_le16(io_request->index, &request->request_id);
4607         request->error_index = request->request_id;
4608         memcpy(request->lun_number, device->scsi3addr,
4609                 sizeof(request->lun_number));
4610
4611         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4612         memcpy(request->cdb, scmd->cmnd, cdb_length);
4613
4614         switch (cdb_length) {
4615         case 6:
4616         case 10:
4617         case 12:
4618         case 16:
4619                 /* No bytes in the Additional CDB bytes field */
4620                 request->additional_cdb_bytes_usage =
4621                         SOP_ADDITIONAL_CDB_BYTES_0;
4622                 break;
4623         case 20:
4624                 /* 4 bytes in the Additional cdb field */
4625                 request->additional_cdb_bytes_usage =
4626                         SOP_ADDITIONAL_CDB_BYTES_4;
4627                 break;
4628         case 24:
4629                 /* 8 bytes in the Additional cdb field */
4630                 request->additional_cdb_bytes_usage =
4631                         SOP_ADDITIONAL_CDB_BYTES_8;
4632                 break;
4633         case 28:
4634                 /* 12 bytes in the Additional cdb field */
4635                 request->additional_cdb_bytes_usage =
4636                         SOP_ADDITIONAL_CDB_BYTES_12;
4637                 break;
4638         case 32:
4639         default:
4640                 /* 16 bytes in the Additional cdb field */
4641                 request->additional_cdb_bytes_usage =
4642                         SOP_ADDITIONAL_CDB_BYTES_16;
4643                 break;
4644         }
4645
4646         switch (scmd->sc_data_direction) {
4647         case DMA_TO_DEVICE:
4648                 request->data_direction = SOP_READ_FLAG;
4649                 break;
4650         case DMA_FROM_DEVICE:
4651                 request->data_direction = SOP_WRITE_FLAG;
4652                 break;
4653         case DMA_NONE:
4654                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4655                 break;
4656         case DMA_BIDIRECTIONAL:
4657                 request->data_direction = SOP_BIDIRECTIONAL;
4658                 break;
4659         default:
4660                 dev_err(&ctrl_info->pci_dev->dev,
4661                         "unknown data direction: %d\n",
4662                         scmd->sc_data_direction);
4663                 break;
4664         }
4665
4666         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4667         if (rc) {
4668                 pqi_free_io_request(io_request);
4669                 return SCSI_MLQUEUE_HOST_BUSY;
4670         }
4671
4672         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4673
4674         return 0;
4675 }
4676
4677 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4678         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4679         struct pqi_queue_group *queue_group)
4680 {
4681         struct pqi_io_request *io_request;
4682
4683         io_request = pqi_alloc_io_request(ctrl_info);
4684
4685         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4686                 device, scmd, queue_group);
4687 }
4688
4689 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4690 {
4691         if (!pqi_ctrl_blocked(ctrl_info))
4692                 schedule_work(&ctrl_info->raid_bypass_retry_work);
4693 }
4694
4695 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4696 {
4697         struct scsi_cmnd *scmd;
4698         struct pqi_scsi_dev *device;
4699         struct pqi_ctrl_info *ctrl_info;
4700
4701         if (!io_request->raid_bypass)
4702                 return false;
4703
4704         scmd = io_request->scmd;
4705         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4706                 return false;
4707         if (host_byte(scmd->result) == DID_NO_CONNECT)
4708                 return false;
4709
4710         device = scmd->device->hostdata;
4711         if (pqi_device_offline(device))
4712                 return false;
4713
4714         ctrl_info = shost_to_hba(scmd->device->host);
4715         if (pqi_ctrl_offline(ctrl_info))
4716                 return false;
4717
4718         return true;
4719 }
4720
4721 static inline void pqi_add_to_raid_bypass_retry_list(
4722         struct pqi_ctrl_info *ctrl_info,
4723         struct pqi_io_request *io_request, bool at_head)
4724 {
4725         unsigned long flags;
4726
4727         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4728         if (at_head)
4729                 list_add(&io_request->request_list_entry,
4730                         &ctrl_info->raid_bypass_retry_list);
4731         else
4732                 list_add_tail(&io_request->request_list_entry,
4733                         &ctrl_info->raid_bypass_retry_list);
4734         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4735 }
4736
4737 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4738         void *context)
4739 {
4740         struct scsi_cmnd *scmd;
4741
4742         scmd = io_request->scmd;
4743         pqi_free_io_request(io_request);
4744         pqi_scsi_done(scmd);
4745 }
4746
4747 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4748 {
4749         struct scsi_cmnd *scmd;
4750         struct pqi_ctrl_info *ctrl_info;
4751
4752         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4753         scmd = io_request->scmd;
4754         scmd->result = 0;
4755         ctrl_info = shost_to_hba(scmd->device->host);
4756
4757         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4758         pqi_schedule_bypass_retry(ctrl_info);
4759 }
4760
4761 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4762 {
4763         struct scsi_cmnd *scmd;
4764         struct pqi_scsi_dev *device;
4765         struct pqi_ctrl_info *ctrl_info;
4766         struct pqi_queue_group *queue_group;
4767
4768         scmd = io_request->scmd;
4769         device = scmd->device->hostdata;
4770         if (pqi_device_in_reset(device)) {
4771                 pqi_free_io_request(io_request);
4772                 set_host_byte(scmd, DID_RESET);
4773                 pqi_scsi_done(scmd);
4774                 return 0;
4775         }
4776
4777         ctrl_info = shost_to_hba(scmd->device->host);
4778         queue_group = io_request->queue_group;
4779
4780         pqi_reinit_io_request(io_request);
4781
4782         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4783                 device, scmd, queue_group);
4784 }
4785
4786 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4787         struct pqi_ctrl_info *ctrl_info)
4788 {
4789         unsigned long flags;
4790         struct pqi_io_request *io_request;
4791
4792         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4793         io_request = list_first_entry_or_null(
4794                 &ctrl_info->raid_bypass_retry_list,
4795                 struct pqi_io_request, request_list_entry);
4796         if (io_request)
4797                 list_del(&io_request->request_list_entry);
4798         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4799
4800         return io_request;
4801 }
4802
4803 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4804 {
4805         int rc;
4806         struct pqi_io_request *io_request;
4807
4808         pqi_ctrl_busy(ctrl_info);
4809
4810         while (1) {
4811                 if (pqi_ctrl_blocked(ctrl_info))
4812                         break;
4813                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4814                 if (!io_request)
4815                         break;
4816                 rc = pqi_retry_raid_bypass(io_request);
4817                 if (rc) {
4818                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4819                                 true);
4820                         pqi_schedule_bypass_retry(ctrl_info);
4821                         break;
4822                 }
4823         }
4824
4825         pqi_ctrl_unbusy(ctrl_info);
4826 }
4827
4828 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4829 {
4830         struct pqi_ctrl_info *ctrl_info;
4831
4832         ctrl_info = container_of(work, struct pqi_ctrl_info,
4833                 raid_bypass_retry_work);
4834         pqi_retry_raid_bypass_requests(ctrl_info);
4835 }
4836
4837 static void pqi_clear_all_queued_raid_bypass_retries(
4838         struct pqi_ctrl_info *ctrl_info)
4839 {
4840         unsigned long flags;
4841
4842         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4843         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4844         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4845 }
4846
4847 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4848         void *context)
4849 {
4850         struct scsi_cmnd *scmd;
4851
4852         scmd = io_request->scmd;
4853         scsi_dma_unmap(scmd);
4854         if (io_request->status == -EAGAIN)
4855                 set_host_byte(scmd, DID_IMM_RETRY);
4856         else if (pqi_raid_bypass_retry_needed(io_request)) {
4857                 pqi_queue_raid_bypass_retry(io_request);
4858                 return;
4859         }
4860         pqi_free_io_request(io_request);
4861         pqi_scsi_done(scmd);
4862 }
4863
4864 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4865         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4866         struct pqi_queue_group *queue_group)
4867 {
4868         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4869                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4870 }
4871
4872 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4873         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4874         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4875         struct pqi_encryption_info *encryption_info, bool raid_bypass)
4876 {
4877         int rc;
4878         struct pqi_io_request *io_request;
4879         struct pqi_aio_path_request *request;
4880
4881         io_request = pqi_alloc_io_request(ctrl_info);
4882         io_request->io_complete_callback = pqi_aio_io_complete;
4883         io_request->scmd = scmd;
4884         io_request->raid_bypass = raid_bypass;
4885
4886         request = io_request->iu;
4887         memset(request, 0,
4888                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4889
4890         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4891         put_unaligned_le32(aio_handle, &request->nexus_id);
4892         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4893         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4894         put_unaligned_le16(io_request->index, &request->request_id);
4895         request->error_index = request->request_id;
4896         if (cdb_length > sizeof(request->cdb))
4897                 cdb_length = sizeof(request->cdb);
4898         request->cdb_length = cdb_length;
4899         memcpy(request->cdb, cdb, cdb_length);
4900
4901         switch (scmd->sc_data_direction) {
4902         case DMA_TO_DEVICE:
4903                 request->data_direction = SOP_READ_FLAG;
4904                 break;
4905         case DMA_FROM_DEVICE:
4906                 request->data_direction = SOP_WRITE_FLAG;
4907                 break;
4908         case DMA_NONE:
4909                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4910                 break;
4911         case DMA_BIDIRECTIONAL:
4912                 request->data_direction = SOP_BIDIRECTIONAL;
4913                 break;
4914         default:
4915                 dev_err(&ctrl_info->pci_dev->dev,
4916                         "unknown data direction: %d\n",
4917                         scmd->sc_data_direction);
4918                 break;
4919         }
4920
4921         if (encryption_info) {
4922                 request->encryption_enable = true;
4923                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4924                         &request->data_encryption_key_index);
4925                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4926                         &request->encrypt_tweak_lower);
4927                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4928                         &request->encrypt_tweak_upper);
4929         }
4930
4931         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4932         if (rc) {
4933                 pqi_free_io_request(io_request);
4934                 return SCSI_MLQUEUE_HOST_BUSY;
4935         }
4936
4937         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4938
4939         return 0;
4940 }
4941
4942 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4943         struct scsi_cmnd *scmd)
4944 {
4945         u16 hw_queue;
4946
4947         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4948         if (hw_queue > ctrl_info->max_hw_queue_index)
4949                 hw_queue = 0;
4950
4951         return hw_queue;
4952 }
4953
4954 /*
4955  * This function gets called just before we hand the completed SCSI request
4956  * back to the SML.
4957  */
4958
4959 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4960 {
4961         struct pqi_scsi_dev *device;
4962
4963         device = scmd->device->hostdata;
4964         atomic_dec(&device->scsi_cmds_outstanding);
4965 }
4966
4967 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4968         struct scsi_cmnd *scmd)
4969 {
4970         int rc;
4971         struct pqi_ctrl_info *ctrl_info;
4972         struct pqi_scsi_dev *device;
4973         u16 hw_queue;
4974         struct pqi_queue_group *queue_group;
4975         bool raid_bypassed;
4976
4977         device = scmd->device->hostdata;
4978         ctrl_info = shost_to_hba(shost);
4979
4980         atomic_inc(&device->scsi_cmds_outstanding);
4981
4982         if (pqi_ctrl_offline(ctrl_info)) {
4983                 set_host_byte(scmd, DID_NO_CONNECT);
4984                 pqi_scsi_done(scmd);
4985                 return 0;
4986         }
4987
4988         pqi_ctrl_busy(ctrl_info);
4989         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4990                 rc = SCSI_MLQUEUE_HOST_BUSY;
4991                 goto out;
4992         }
4993
4994         /*
4995          * This is necessary because the SML doesn't zero out this field during
4996          * error recovery.
4997          */
4998         scmd->result = 0;
4999
5000         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5001         queue_group = &ctrl_info->queue_groups[hw_queue];
5002
5003         if (pqi_is_logical_device(device)) {
5004                 raid_bypassed = false;
5005                 if (device->raid_bypass_enabled &&
5006                                 !blk_rq_is_passthrough(scmd->request)) {
5007                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5008                                 scmd, queue_group);
5009                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5010                                 raid_bypassed = true;
5011                 }
5012                 if (!raid_bypassed)
5013                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5014                                 queue_group);
5015         } else {
5016                 if (device->aio_enabled)
5017                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5018                                 queue_group);
5019                 else
5020                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5021                                 queue_group);
5022         }
5023
5024 out:
5025         pqi_ctrl_unbusy(ctrl_info);
5026         if (rc)
5027                 atomic_dec(&device->scsi_cmds_outstanding);
5028
5029         return rc;
5030 }
5031
5032 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5033         struct pqi_queue_group *queue_group)
5034 {
5035         unsigned int path;
5036         unsigned long flags;
5037         bool list_is_empty;
5038
5039         for (path = 0; path < 2; path++) {
5040                 while (1) {
5041                         spin_lock_irqsave(
5042                                 &queue_group->submit_lock[path], flags);
5043                         list_is_empty =
5044                                 list_empty(&queue_group->request_list[path]);
5045                         spin_unlock_irqrestore(
5046                                 &queue_group->submit_lock[path], flags);
5047                         if (list_is_empty)
5048                                 break;
5049                         pqi_check_ctrl_health(ctrl_info);
5050                         if (pqi_ctrl_offline(ctrl_info))
5051                                 return -ENXIO;
5052                         usleep_range(1000, 2000);
5053                 }
5054         }
5055
5056         return 0;
5057 }
5058
5059 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5060 {
5061         int rc;
5062         unsigned int i;
5063         unsigned int path;
5064         struct pqi_queue_group *queue_group;
5065         pqi_index_t iq_pi;
5066         pqi_index_t iq_ci;
5067
5068         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5069                 queue_group = &ctrl_info->queue_groups[i];
5070
5071                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5072                 if (rc)
5073                         return rc;
5074
5075                 for (path = 0; path < 2; path++) {
5076                         iq_pi = queue_group->iq_pi_copy[path];
5077
5078                         while (1) {
5079                                 iq_ci = *queue_group->iq_ci[path];
5080                                 if (iq_ci == iq_pi)
5081                                         break;
5082                                 pqi_check_ctrl_health(ctrl_info);
5083                                 if (pqi_ctrl_offline(ctrl_info))
5084                                         return -ENXIO;
5085                                 usleep_range(1000, 2000);
5086                         }
5087                 }
5088         }
5089
5090         return 0;
5091 }
5092
5093 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5094         struct pqi_scsi_dev *device)
5095 {
5096         unsigned int i;
5097         unsigned int path;
5098         struct pqi_queue_group *queue_group;
5099         unsigned long flags;
5100         struct pqi_io_request *io_request;
5101         struct pqi_io_request *next;
5102         struct scsi_cmnd *scmd;
5103         struct pqi_scsi_dev *scsi_device;
5104
5105         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5106                 queue_group = &ctrl_info->queue_groups[i];
5107
5108                 for (path = 0; path < 2; path++) {
5109                         spin_lock_irqsave(
5110                                 &queue_group->submit_lock[path], flags);
5111
5112                         list_for_each_entry_safe(io_request, next,
5113                                 &queue_group->request_list[path],
5114                                 request_list_entry) {
5115                                 scmd = io_request->scmd;
5116                                 if (!scmd)
5117                                         continue;
5118
5119                                 scsi_device = scmd->device->hostdata;
5120                                 if (scsi_device != device)
5121                                         continue;
5122
5123                                 list_del(&io_request->request_list_entry);
5124                                 set_host_byte(scmd, DID_RESET);
5125                                 pqi_scsi_done(scmd);
5126                         }
5127
5128                         spin_unlock_irqrestore(
5129                                 &queue_group->submit_lock[path], flags);
5130                 }
5131         }
5132 }
5133
5134 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5135         struct pqi_scsi_dev *device)
5136 {
5137         while (atomic_read(&device->scsi_cmds_outstanding)) {
5138                 pqi_check_ctrl_health(ctrl_info);
5139                 if (pqi_ctrl_offline(ctrl_info))
5140                         return -ENXIO;
5141                 usleep_range(1000, 2000);
5142         }
5143
5144         return 0;
5145 }
5146
5147 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5148 {
5149         bool io_pending;
5150         unsigned long flags;
5151         struct pqi_scsi_dev *device;
5152
5153         while (1) {
5154                 io_pending = false;
5155
5156                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5157                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5158                         scsi_device_list_entry) {
5159                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5160                                 io_pending = true;
5161                                 break;
5162                         }
5163                 }
5164                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5165                                         flags);
5166
5167                 if (!io_pending)
5168                         break;
5169
5170                 pqi_check_ctrl_health(ctrl_info);
5171                 if (pqi_ctrl_offline(ctrl_info))
5172                         return -ENXIO;
5173
5174                 usleep_range(1000, 2000);
5175         }
5176
5177         return 0;
5178 }
5179
5180 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5181         void *context)
5182 {
5183         struct completion *waiting = context;
5184
5185         complete(waiting);
5186 }
5187
5188 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5189
5190 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5191         struct pqi_scsi_dev *device, struct completion *wait)
5192 {
5193         int rc;
5194
5195         while (1) {
5196                 if (wait_for_completion_io_timeout(wait,
5197                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5198                         rc = 0;
5199                         break;
5200                 }
5201
5202                 pqi_check_ctrl_health(ctrl_info);
5203                 if (pqi_ctrl_offline(ctrl_info)) {
5204                         rc = -ENXIO;
5205                         break;
5206                 }
5207         }
5208
5209         return rc;
5210 }
5211
5212 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5213         struct pqi_scsi_dev *device)
5214 {
5215         int rc;
5216         struct pqi_io_request *io_request;
5217         DECLARE_COMPLETION_ONSTACK(wait);
5218         struct pqi_task_management_request *request;
5219
5220         io_request = pqi_alloc_io_request(ctrl_info);
5221         io_request->io_complete_callback = pqi_lun_reset_complete;
5222         io_request->context = &wait;
5223
5224         request = io_request->iu;
5225         memset(request, 0, sizeof(*request));
5226
5227         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5228         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5229                 &request->header.iu_length);
5230         put_unaligned_le16(io_request->index, &request->request_id);
5231         memcpy(request->lun_number, device->scsi3addr,
5232                 sizeof(request->lun_number));
5233         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5234
5235         pqi_start_io(ctrl_info,
5236                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5237                 io_request);
5238
5239         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5240         if (rc == 0)
5241                 rc = io_request->status;
5242
5243         pqi_free_io_request(io_request);
5244
5245         return rc;
5246 }
5247
5248 /* Performs a reset at the LUN level. */
5249
5250 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5251         struct pqi_scsi_dev *device)
5252 {
5253         int rc;
5254
5255         rc = pqi_lun_reset(ctrl_info, device);
5256         if (rc == 0)
5257                 rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5258
5259         return rc == 0 ? SUCCESS : FAILED;
5260 }
5261
5262 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5263 {
5264         int rc;
5265         struct Scsi_Host *shost;
5266         struct pqi_ctrl_info *ctrl_info;
5267         struct pqi_scsi_dev *device;
5268
5269         shost = scmd->device->host;
5270         ctrl_info = shost_to_hba(shost);
5271         device = scmd->device->hostdata;
5272
5273         dev_err(&ctrl_info->pci_dev->dev,
5274                 "resetting scsi %d:%d:%d:%d\n",
5275                 shost->host_no, device->bus, device->target, device->lun);
5276
5277         pqi_check_ctrl_health(ctrl_info);
5278         if (pqi_ctrl_offline(ctrl_info)) {
5279                 rc = FAILED;
5280                 goto out;
5281         }
5282
5283         mutex_lock(&ctrl_info->lun_reset_mutex);
5284
5285         pqi_ctrl_block_requests(ctrl_info);
5286         pqi_ctrl_wait_until_quiesced(ctrl_info);
5287         pqi_fail_io_queued_for_device(ctrl_info, device);
5288         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5289         pqi_device_reset_start(device);
5290         pqi_ctrl_unblock_requests(ctrl_info);
5291
5292         if (rc)
5293                 rc = FAILED;
5294         else
5295                 rc = pqi_device_reset(ctrl_info, device);
5296
5297         pqi_device_reset_done(device);
5298
5299         mutex_unlock(&ctrl_info->lun_reset_mutex);
5300
5301 out:
5302         dev_err(&ctrl_info->pci_dev->dev,
5303                 "reset of scsi %d:%d:%d:%d: %s\n",
5304                 shost->host_no, device->bus, device->target, device->lun,
5305                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5306
5307         return rc;
5308 }
5309
5310 static int pqi_slave_alloc(struct scsi_device *sdev)
5311 {
5312         struct pqi_scsi_dev *device;
5313         unsigned long flags;
5314         struct pqi_ctrl_info *ctrl_info;
5315         struct scsi_target *starget;
5316         struct sas_rphy *rphy;
5317
5318         ctrl_info = shost_to_hba(sdev->host);
5319
5320         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5321
5322         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5323                 starget = scsi_target(sdev);
5324                 rphy = target_to_rphy(starget);
5325                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5326                 if (device) {
5327                         device->target = sdev_id(sdev);
5328                         device->lun = sdev->lun;
5329                         device->target_lun_valid = true;
5330                 }
5331         } else {
5332                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5333                         sdev_id(sdev), sdev->lun);
5334         }
5335
5336         if (device) {
5337                 sdev->hostdata = device;
5338                 device->sdev = sdev;
5339                 if (device->queue_depth) {
5340                         device->advertised_queue_depth = device->queue_depth;
5341                         scsi_change_queue_depth(sdev,
5342                                 device->advertised_queue_depth);
5343                 }
5344         }
5345
5346         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5347
5348         return 0;
5349 }
5350
5351 static int pqi_map_queues(struct Scsi_Host *shost)
5352 {
5353         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5354
5355         return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev);
5356 }
5357
5358 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5359         void __user *arg)
5360 {
5361         struct pci_dev *pci_dev;
5362         u32 subsystem_vendor;
5363         u32 subsystem_device;
5364         cciss_pci_info_struct pciinfo;
5365
5366         if (!arg)
5367                 return -EINVAL;
5368
5369         pci_dev = ctrl_info->pci_dev;
5370
5371         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5372         pciinfo.bus = pci_dev->bus->number;
5373         pciinfo.dev_fn = pci_dev->devfn;
5374         subsystem_vendor = pci_dev->subsystem_vendor;
5375         subsystem_device = pci_dev->subsystem_device;
5376         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5377                 subsystem_vendor;
5378
5379         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5380                 return -EFAULT;
5381
5382         return 0;
5383 }
5384
5385 static int pqi_getdrivver_ioctl(void __user *arg)
5386 {
5387         u32 version;
5388
5389         if (!arg)
5390                 return -EINVAL;
5391
5392         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5393                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5394
5395         if (copy_to_user(arg, &version, sizeof(version)))
5396                 return -EFAULT;
5397
5398         return 0;
5399 }
5400
5401 struct ciss_error_info {
5402         u8      scsi_status;
5403         int     command_status;
5404         size_t  sense_data_length;
5405 };
5406
5407 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5408         struct ciss_error_info *ciss_error_info)
5409 {
5410         int ciss_cmd_status;
5411         size_t sense_data_length;
5412
5413         switch (pqi_error_info->data_out_result) {
5414         case PQI_DATA_IN_OUT_GOOD:
5415                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5416                 break;
5417         case PQI_DATA_IN_OUT_UNDERFLOW:
5418                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5419                 break;
5420         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5421                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5422                 break;
5423         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5424         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5425         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5426         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5427         case PQI_DATA_IN_OUT_ERROR:
5428                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5429                 break;
5430         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5431         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5432         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5433         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5434         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5435         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5436         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5437         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5438         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5439         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5440                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5441                 break;
5442         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5443                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5444                 break;
5445         case PQI_DATA_IN_OUT_ABORTED:
5446                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5447                 break;
5448         case PQI_DATA_IN_OUT_TIMEOUT:
5449                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5450                 break;
5451         default:
5452                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5453                 break;
5454         }
5455
5456         sense_data_length =
5457                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5458         if (sense_data_length == 0)
5459                 sense_data_length =
5460                 get_unaligned_le16(&pqi_error_info->response_data_length);
5461         if (sense_data_length)
5462                 if (sense_data_length > sizeof(pqi_error_info->data))
5463                         sense_data_length = sizeof(pqi_error_info->data);
5464
5465         ciss_error_info->scsi_status = pqi_error_info->status;
5466         ciss_error_info->command_status = ciss_cmd_status;
5467         ciss_error_info->sense_data_length = sense_data_length;
5468 }
5469
5470 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5471 {
5472         int rc;
5473         char *kernel_buffer = NULL;
5474         u16 iu_length;
5475         size_t sense_data_length;
5476         IOCTL_Command_struct iocommand;
5477         struct pqi_raid_path_request request;
5478         struct pqi_raid_error_info pqi_error_info;
5479         struct ciss_error_info ciss_error_info;
5480
5481         if (pqi_ctrl_offline(ctrl_info))
5482                 return -ENXIO;
5483         if (!arg)
5484                 return -EINVAL;
5485         if (!capable(CAP_SYS_RAWIO))
5486                 return -EPERM;
5487         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5488                 return -EFAULT;
5489         if (iocommand.buf_size < 1 &&
5490                 iocommand.Request.Type.Direction != XFER_NONE)
5491                 return -EINVAL;
5492         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5493                 return -EINVAL;
5494         if (iocommand.Request.Type.Type != TYPE_CMD)
5495                 return -EINVAL;
5496
5497         switch (iocommand.Request.Type.Direction) {
5498         case XFER_NONE:
5499         case XFER_WRITE:
5500         case XFER_READ:
5501                 break;
5502         default:
5503                 return -EINVAL;
5504         }
5505
5506         if (iocommand.buf_size > 0) {
5507                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5508                 if (!kernel_buffer)
5509                         return -ENOMEM;
5510                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5511                         if (copy_from_user(kernel_buffer, iocommand.buf,
5512                                 iocommand.buf_size)) {
5513                                 rc = -EFAULT;
5514                                 goto out;
5515                         }
5516                 } else {
5517                         memset(kernel_buffer, 0, iocommand.buf_size);
5518                 }
5519         }
5520
5521         memset(&request, 0, sizeof(request));
5522
5523         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5524         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5525                 PQI_REQUEST_HEADER_LENGTH;
5526         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5527                 sizeof(request.lun_number));
5528         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5529         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5530
5531         switch (iocommand.Request.Type.Direction) {
5532         case XFER_NONE:
5533                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5534                 break;
5535         case XFER_WRITE:
5536                 request.data_direction = SOP_WRITE_FLAG;
5537                 break;
5538         case XFER_READ:
5539                 request.data_direction = SOP_READ_FLAG;
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 #define PQI_RESET_ACTION_RESET          0x1
5893
5894 #define PQI_RESET_TYPE_NO_RESET         0x0
5895 #define PQI_RESET_TYPE_SOFT_RESET       0x1
5896 #define PQI_RESET_TYPE_FIRM_RESET       0x2
5897 #define PQI_RESET_TYPE_HARD_RESET       0x3
5898
5899 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5900 {
5901         int rc;
5902         u32 reset_params;
5903
5904         reset_params = (PQI_RESET_ACTION_RESET << 5) |
5905                 PQI_RESET_TYPE_HARD_RESET;
5906
5907         writel(reset_params,
5908                 &ctrl_info->pqi_registers->device_reset);
5909
5910         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
5911         if (rc)
5912                 dev_err(&ctrl_info->pci_dev->dev,
5913                         "PQI reset failed\n");
5914
5915         return rc;
5916 }
5917
5918 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5919 {
5920         int rc;
5921         struct bmic_identify_controller *identify;
5922
5923         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5924         if (!identify)
5925                 return -ENOMEM;
5926
5927         rc = pqi_identify_controller(ctrl_info, identify);
5928         if (rc)
5929                 goto out;
5930
5931         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5932                 sizeof(identify->firmware_version));
5933         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5934         snprintf(ctrl_info->firmware_version +
5935                 strlen(ctrl_info->firmware_version),
5936                 sizeof(ctrl_info->firmware_version),
5937                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5938
5939 out:
5940         kfree(identify);
5941
5942         return rc;
5943 }
5944
5945 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5946 {
5947         u32 table_length;
5948         u32 section_offset;
5949         void __iomem *table_iomem_addr;
5950         struct pqi_config_table *config_table;
5951         struct pqi_config_table_section_header *section;
5952
5953         table_length = ctrl_info->config_table_length;
5954
5955         config_table = kmalloc(table_length, GFP_KERNEL);
5956         if (!config_table) {
5957                 dev_err(&ctrl_info->pci_dev->dev,
5958                         "failed to allocate memory for PQI configuration table\n");
5959                 return -ENOMEM;
5960         }
5961
5962         /*
5963          * Copy the config table contents from I/O memory space into the
5964          * temporary buffer.
5965          */
5966         table_iomem_addr = ctrl_info->iomem_base +
5967                 ctrl_info->config_table_offset;
5968         memcpy_fromio(config_table, table_iomem_addr, table_length);
5969
5970         section_offset =
5971                 get_unaligned_le32(&config_table->first_section_offset);
5972
5973         while (section_offset) {
5974                 section = (void *)config_table + section_offset;
5975
5976                 switch (get_unaligned_le16(&section->section_id)) {
5977                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
5978                         if (pqi_disable_heartbeat)
5979                                 dev_warn(&ctrl_info->pci_dev->dev,
5980                                 "heartbeat disabled by module parameter\n");
5981                         else
5982                                 ctrl_info->heartbeat_counter =
5983                                         table_iomem_addr +
5984                                         section_offset +
5985                                         offsetof(
5986                                         struct pqi_config_table_heartbeat,
5987                                                 heartbeat_counter);
5988                         break;
5989                 }
5990
5991                 section_offset =
5992                         get_unaligned_le16(&section->next_section_offset);
5993         }
5994
5995         kfree(config_table);
5996
5997         return 0;
5998 }
5999
6000 /* Switches the controller from PQI mode back into SIS mode. */
6001
6002 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6003 {
6004         int rc;
6005
6006         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6007         rc = pqi_reset(ctrl_info);
6008         if (rc)
6009                 return rc;
6010         sis_reenable_sis_mode(ctrl_info);
6011         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6012
6013         return 0;
6014 }
6015
6016 /*
6017  * If the controller isn't already in SIS mode, this function forces it into
6018  * SIS mode.
6019  */
6020
6021 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6022 {
6023         if (!sis_is_firmware_running(ctrl_info))
6024                 return -ENXIO;
6025
6026         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6027                 return 0;
6028
6029         if (sis_is_kernel_up(ctrl_info)) {
6030                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6031                 return 0;
6032         }
6033
6034         return pqi_revert_to_sis_mode(ctrl_info);
6035 }
6036
6037 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6038 {
6039         int rc;
6040
6041         rc = pqi_force_sis_mode(ctrl_info);
6042         if (rc)
6043                 return rc;
6044
6045         /*
6046          * Wait until the controller is ready to start accepting SIS
6047          * commands.
6048          */
6049         rc = sis_wait_for_ctrl_ready(ctrl_info);
6050         if (rc)
6051                 return rc;
6052
6053         /*
6054          * Get the controller properties.  This allows us to determine
6055          * whether or not it supports PQI mode.
6056          */
6057         rc = sis_get_ctrl_properties(ctrl_info);
6058         if (rc) {
6059                 dev_err(&ctrl_info->pci_dev->dev,
6060                         "error obtaining controller properties\n");
6061                 return rc;
6062         }
6063
6064         rc = sis_get_pqi_capabilities(ctrl_info);
6065         if (rc) {
6066                 dev_err(&ctrl_info->pci_dev->dev,
6067                         "error obtaining controller capabilities\n");
6068                 return rc;
6069         }
6070
6071         if (reset_devices) {
6072                 if (ctrl_info->max_outstanding_requests >
6073                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6074                         ctrl_info->max_outstanding_requests =
6075                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6076         } else {
6077                 if (ctrl_info->max_outstanding_requests >
6078                         PQI_MAX_OUTSTANDING_REQUESTS)
6079                         ctrl_info->max_outstanding_requests =
6080                                         PQI_MAX_OUTSTANDING_REQUESTS;
6081         }
6082
6083         pqi_calculate_io_resources(ctrl_info);
6084
6085         rc = pqi_alloc_error_buffer(ctrl_info);
6086         if (rc) {
6087                 dev_err(&ctrl_info->pci_dev->dev,
6088                         "failed to allocate PQI error buffer\n");
6089                 return rc;
6090         }
6091
6092         /*
6093          * If the function we are about to call succeeds, the
6094          * controller will transition from legacy SIS mode
6095          * into PQI mode.
6096          */
6097         rc = sis_init_base_struct_addr(ctrl_info);
6098         if (rc) {
6099                 dev_err(&ctrl_info->pci_dev->dev,
6100                         "error initializing PQI mode\n");
6101                 return rc;
6102         }
6103
6104         /* Wait for the controller to complete the SIS -> PQI transition. */
6105         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6106         if (rc) {
6107                 dev_err(&ctrl_info->pci_dev->dev,
6108                         "transition to PQI mode failed\n");
6109                 return rc;
6110         }
6111
6112         /* From here on, we are running in PQI mode. */
6113         ctrl_info->pqi_mode_enabled = true;
6114         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6115
6116         rc = pqi_process_config_table(ctrl_info);
6117         if (rc)
6118                 return rc;
6119
6120         rc = pqi_alloc_admin_queues(ctrl_info);
6121         if (rc) {
6122                 dev_err(&ctrl_info->pci_dev->dev,
6123                         "failed to allocate admin queues\n");
6124                 return rc;
6125         }
6126
6127         rc = pqi_create_admin_queues(ctrl_info);
6128         if (rc) {
6129                 dev_err(&ctrl_info->pci_dev->dev,
6130                         "error creating admin queues\n");
6131                 return rc;
6132         }
6133
6134         rc = pqi_report_device_capability(ctrl_info);
6135         if (rc) {
6136                 dev_err(&ctrl_info->pci_dev->dev,
6137                         "obtaining device capability failed\n");
6138                 return rc;
6139         }
6140
6141         rc = pqi_validate_device_capability(ctrl_info);
6142         if (rc)
6143                 return rc;
6144
6145         pqi_calculate_queue_resources(ctrl_info);
6146
6147         rc = pqi_enable_msix_interrupts(ctrl_info);
6148         if (rc)
6149                 return rc;
6150
6151         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6152                 ctrl_info->max_msix_vectors =
6153                         ctrl_info->num_msix_vectors_enabled;
6154                 pqi_calculate_queue_resources(ctrl_info);
6155         }
6156
6157         rc = pqi_alloc_io_resources(ctrl_info);
6158         if (rc)
6159                 return rc;
6160
6161         rc = pqi_alloc_operational_queues(ctrl_info);
6162         if (rc) {
6163                 dev_err(&ctrl_info->pci_dev->dev,
6164                         "failed to allocate operational queues\n");
6165                 return rc;
6166         }
6167
6168         pqi_init_operational_queues(ctrl_info);
6169
6170         rc = pqi_request_irqs(ctrl_info);
6171         if (rc)
6172                 return rc;
6173
6174         rc = pqi_create_queues(ctrl_info);
6175         if (rc)
6176                 return rc;
6177
6178         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6179
6180         ctrl_info->controller_online = true;
6181         pqi_start_heartbeat_timer(ctrl_info);
6182
6183         rc = pqi_enable_events(ctrl_info);
6184         if (rc) {
6185                 dev_err(&ctrl_info->pci_dev->dev,
6186                         "error enabling events\n");
6187                 return rc;
6188         }
6189
6190         /* Register with the SCSI subsystem. */
6191         rc = pqi_register_scsi(ctrl_info);
6192         if (rc)
6193                 return rc;
6194
6195         rc = pqi_get_ctrl_firmware_version(ctrl_info);
6196         if (rc) {
6197                 dev_err(&ctrl_info->pci_dev->dev,
6198                         "error obtaining firmware version\n");
6199                 return rc;
6200         }
6201
6202         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6203         if (rc) {
6204                 dev_err(&ctrl_info->pci_dev->dev,
6205                         "error updating host wellness\n");
6206                 return rc;
6207         }
6208
6209         pqi_schedule_update_time_worker(ctrl_info);
6210
6211         pqi_scan_scsi_devices(ctrl_info);
6212
6213         return 0;
6214 }
6215
6216 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6217 {
6218         unsigned int i;
6219         struct pqi_admin_queues *admin_queues;
6220         struct pqi_event_queue *event_queue;
6221
6222         admin_queues = &ctrl_info->admin_queues;
6223         admin_queues->iq_pi_copy = 0;
6224         admin_queues->oq_ci_copy = 0;
6225         *admin_queues->oq_pi = 0;
6226
6227         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6228                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6229                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6230                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
6231
6232                 *ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6233                 *ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6234                 *ctrl_info->queue_groups[i].oq_pi = 0;
6235         }
6236
6237         event_queue = &ctrl_info->event_queue;
6238         *event_queue->oq_pi = 0;
6239         event_queue->oq_ci_copy = 0;
6240 }
6241
6242 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6243 {
6244         int rc;
6245
6246         rc = pqi_force_sis_mode(ctrl_info);
6247         if (rc)
6248                 return rc;
6249
6250         /*
6251          * Wait until the controller is ready to start accepting SIS
6252          * commands.
6253          */
6254         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6255         if (rc)
6256                 return rc;
6257
6258         /*
6259          * If the function we are about to call succeeds, the
6260          * controller will transition from legacy SIS mode
6261          * into PQI mode.
6262          */
6263         rc = sis_init_base_struct_addr(ctrl_info);
6264         if (rc) {
6265                 dev_err(&ctrl_info->pci_dev->dev,
6266                         "error initializing PQI mode\n");
6267                 return rc;
6268         }
6269
6270         /* Wait for the controller to complete the SIS -> PQI transition. */
6271         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6272         if (rc) {
6273                 dev_err(&ctrl_info->pci_dev->dev,
6274                         "transition to PQI mode failed\n");
6275                 return rc;
6276         }
6277
6278         /* From here on, we are running in PQI mode. */
6279         ctrl_info->pqi_mode_enabled = true;
6280         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6281
6282         pqi_reinit_queues(ctrl_info);
6283
6284         rc = pqi_create_admin_queues(ctrl_info);
6285         if (rc) {
6286                 dev_err(&ctrl_info->pci_dev->dev,
6287                         "error creating admin queues\n");
6288                 return rc;
6289         }
6290
6291         rc = pqi_create_queues(ctrl_info);
6292         if (rc)
6293                 return rc;
6294
6295         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6296
6297         ctrl_info->controller_online = true;
6298         pqi_start_heartbeat_timer(ctrl_info);
6299         pqi_ctrl_unblock_requests(ctrl_info);
6300
6301         rc = pqi_enable_events(ctrl_info);
6302         if (rc) {
6303                 dev_err(&ctrl_info->pci_dev->dev,
6304                         "error enabling events\n");
6305                 return rc;
6306         }
6307
6308         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6309         if (rc) {
6310                 dev_err(&ctrl_info->pci_dev->dev,
6311                         "error updating host wellness\n");
6312                 return rc;
6313         }
6314
6315         pqi_schedule_update_time_worker(ctrl_info);
6316
6317         pqi_scan_scsi_devices(ctrl_info);
6318
6319         return 0;
6320 }
6321
6322 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6323         u16 timeout)
6324 {
6325         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6326                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6327 }
6328
6329 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6330 {
6331         int rc;
6332         u64 mask;
6333
6334         rc = pci_enable_device(ctrl_info->pci_dev);
6335         if (rc) {
6336                 dev_err(&ctrl_info->pci_dev->dev,
6337                         "failed to enable PCI device\n");
6338                 return rc;
6339         }
6340
6341         if (sizeof(dma_addr_t) > 4)
6342                 mask = DMA_BIT_MASK(64);
6343         else
6344                 mask = DMA_BIT_MASK(32);
6345
6346         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
6347         if (rc) {
6348                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6349                 goto disable_device;
6350         }
6351
6352         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6353         if (rc) {
6354                 dev_err(&ctrl_info->pci_dev->dev,
6355                         "failed to obtain PCI resources\n");
6356                 goto disable_device;
6357         }
6358
6359         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6360                 ctrl_info->pci_dev, 0),
6361                 sizeof(struct pqi_ctrl_registers));
6362         if (!ctrl_info->iomem_base) {
6363                 dev_err(&ctrl_info->pci_dev->dev,
6364                         "failed to map memory for controller registers\n");
6365                 rc = -ENOMEM;
6366                 goto release_regions;
6367         }
6368
6369 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
6370
6371         /* Increase the PCIe completion timeout. */
6372         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6373                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6374         if (rc) {
6375                 dev_err(&ctrl_info->pci_dev->dev,
6376                         "failed to set PCIe completion timeout\n");
6377                 goto release_regions;
6378         }
6379
6380         /* Enable bus mastering. */
6381         pci_set_master(ctrl_info->pci_dev);
6382
6383         ctrl_info->registers = ctrl_info->iomem_base;
6384         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6385
6386         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6387
6388         return 0;
6389
6390 release_regions:
6391         pci_release_regions(ctrl_info->pci_dev);
6392 disable_device:
6393         pci_disable_device(ctrl_info->pci_dev);
6394
6395         return rc;
6396 }
6397
6398 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6399 {
6400         iounmap(ctrl_info->iomem_base);
6401         pci_release_regions(ctrl_info->pci_dev);
6402         if (pci_is_enabled(ctrl_info->pci_dev))
6403                 pci_disable_device(ctrl_info->pci_dev);
6404         pci_set_drvdata(ctrl_info->pci_dev, NULL);
6405 }
6406
6407 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6408 {
6409         struct pqi_ctrl_info *ctrl_info;
6410
6411         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6412                         GFP_KERNEL, numa_node);
6413         if (!ctrl_info)
6414                 return NULL;
6415
6416         mutex_init(&ctrl_info->scan_mutex);
6417         mutex_init(&ctrl_info->lun_reset_mutex);
6418
6419         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6420         spin_lock_init(&ctrl_info->scsi_device_list_lock);
6421
6422         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6423         atomic_set(&ctrl_info->num_interrupts, 0);
6424
6425         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6426         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6427
6428         init_timer(&ctrl_info->heartbeat_timer);
6429         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6430
6431         sema_init(&ctrl_info->sync_request_sem,
6432                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6433         init_waitqueue_head(&ctrl_info->block_requests_wait);
6434
6435         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6436         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6437         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6438                 pqi_raid_bypass_retry_worker);
6439
6440         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6441         ctrl_info->irq_mode = IRQ_MODE_NONE;
6442         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6443
6444         return ctrl_info;
6445 }
6446
6447 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6448 {
6449         kfree(ctrl_info);
6450 }
6451
6452 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6453 {
6454         pqi_free_irqs(ctrl_info);
6455         pqi_disable_msix_interrupts(ctrl_info);
6456 }
6457
6458 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6459 {
6460         pqi_stop_heartbeat_timer(ctrl_info);
6461         pqi_free_interrupts(ctrl_info);
6462         if (ctrl_info->queue_memory_base)
6463                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6464                         ctrl_info->queue_memory_length,
6465                         ctrl_info->queue_memory_base,
6466                         ctrl_info->queue_memory_base_dma_handle);
6467         if (ctrl_info->admin_queue_memory_base)
6468                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6469                         ctrl_info->admin_queue_memory_length,
6470                         ctrl_info->admin_queue_memory_base,
6471                         ctrl_info->admin_queue_memory_base_dma_handle);
6472         pqi_free_all_io_requests(ctrl_info);
6473         if (ctrl_info->error_buffer)
6474                 dma_free_coherent(&ctrl_info->pci_dev->dev,
6475                         ctrl_info->error_buffer_length,
6476                         ctrl_info->error_buffer,
6477                         ctrl_info->error_buffer_dma_handle);
6478         if (ctrl_info->iomem_base)
6479                 pqi_cleanup_pci_init(ctrl_info);
6480         pqi_free_ctrl_info(ctrl_info);
6481 }
6482
6483 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6484 {
6485         pqi_cancel_rescan_worker(ctrl_info);
6486         pqi_cancel_update_time_worker(ctrl_info);
6487         pqi_remove_all_scsi_devices(ctrl_info);
6488         pqi_unregister_scsi(ctrl_info);
6489         if (ctrl_info->pqi_mode_enabled)
6490                 pqi_revert_to_sis_mode(ctrl_info);
6491         pqi_free_ctrl_resources(ctrl_info);
6492 }
6493
6494 static void pqi_perform_lockup_action(void)
6495 {
6496         switch (pqi_lockup_action) {
6497         case PANIC:
6498                 panic("FATAL: Smart Family Controller lockup detected");
6499                 break;
6500         case REBOOT:
6501                 emergency_restart();
6502                 break;
6503         case NONE:
6504         default:
6505                 break;
6506         }
6507 }
6508
6509 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6510         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6511         .status = SAM_STAT_CHECK_CONDITION,
6512 };
6513
6514 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6515 {
6516         unsigned int i;
6517         struct pqi_io_request *io_request;
6518         struct scsi_cmnd *scmd;
6519
6520         for (i = 0; i < ctrl_info->max_io_slots; i++) {
6521                 io_request = &ctrl_info->io_request_pool[i];
6522                 if (atomic_read(&io_request->refcount) == 0)
6523                         continue;
6524
6525                 scmd = io_request->scmd;
6526                 if (scmd) {
6527                         set_host_byte(scmd, DID_NO_CONNECT);
6528                 } else {
6529                         io_request->status = -ENXIO;
6530                         io_request->error_info =
6531                                 &pqi_ctrl_offline_raid_error_info;
6532                 }
6533
6534                 io_request->io_complete_callback(io_request,
6535                         io_request->context);
6536         }
6537 }
6538
6539 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6540 {
6541         pqi_perform_lockup_action();
6542         pqi_stop_heartbeat_timer(ctrl_info);
6543         pqi_free_interrupts(ctrl_info);
6544         pqi_cancel_rescan_worker(ctrl_info);
6545         pqi_cancel_update_time_worker(ctrl_info);
6546         pqi_ctrl_wait_until_quiesced(ctrl_info);
6547         pqi_fail_all_outstanding_requests(ctrl_info);
6548         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6549         pqi_ctrl_unblock_requests(ctrl_info);
6550 }
6551
6552 static void pqi_ctrl_offline_worker(struct work_struct *work)
6553 {
6554         struct pqi_ctrl_info *ctrl_info;
6555
6556         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6557         pqi_take_ctrl_offline_deferred(ctrl_info);
6558 }
6559
6560 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6561 {
6562         if (!ctrl_info->controller_online)
6563                 return;
6564
6565         ctrl_info->controller_online = false;
6566         ctrl_info->pqi_mode_enabled = false;
6567         pqi_ctrl_block_requests(ctrl_info);
6568         if (!pqi_disable_ctrl_shutdown)
6569                 sis_shutdown_ctrl(ctrl_info);
6570         pci_disable_device(ctrl_info->pci_dev);
6571         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6572         schedule_work(&ctrl_info->ctrl_offline_work);
6573 }
6574
6575 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6576         const struct pci_device_id *id)
6577 {
6578         char *ctrl_description;
6579
6580         if (id->driver_data)
6581                 ctrl_description = (char *)id->driver_data;
6582         else
6583                 ctrl_description = "Microsemi Smart Family Controller";
6584
6585         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6586 }
6587
6588 static int pqi_pci_probe(struct pci_dev *pci_dev,
6589         const struct pci_device_id *id)
6590 {
6591         int rc;
6592         int node;
6593         struct pqi_ctrl_info *ctrl_info;
6594
6595         pqi_print_ctrl_info(pci_dev, id);
6596
6597         if (pqi_disable_device_id_wildcards &&
6598                 id->subvendor == PCI_ANY_ID &&
6599                 id->subdevice == PCI_ANY_ID) {
6600                 dev_warn(&pci_dev->dev,
6601                         "controller not probed because device ID wildcards are disabled\n");
6602                 return -ENODEV;
6603         }
6604
6605         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6606                 dev_warn(&pci_dev->dev,
6607                         "controller device ID matched using wildcards\n");
6608
6609         node = dev_to_node(&pci_dev->dev);
6610         if (node == NUMA_NO_NODE)
6611                 set_dev_node(&pci_dev->dev, 0);
6612
6613         ctrl_info = pqi_alloc_ctrl_info(node);
6614         if (!ctrl_info) {
6615                 dev_err(&pci_dev->dev,
6616                         "failed to allocate controller info block\n");
6617                 return -ENOMEM;
6618         }
6619
6620         ctrl_info->pci_dev = pci_dev;
6621
6622         rc = pqi_pci_init(ctrl_info);
6623         if (rc)
6624                 goto error;
6625
6626         rc = pqi_ctrl_init(ctrl_info);
6627         if (rc)
6628                 goto error;
6629
6630         return 0;
6631
6632 error:
6633         pqi_remove_ctrl(ctrl_info);
6634
6635         return rc;
6636 }
6637
6638 static void pqi_pci_remove(struct pci_dev *pci_dev)
6639 {
6640         struct pqi_ctrl_info *ctrl_info;
6641
6642         ctrl_info = pci_get_drvdata(pci_dev);
6643         if (!ctrl_info)
6644                 return;
6645
6646         pqi_remove_ctrl(ctrl_info);
6647 }
6648
6649 static void pqi_shutdown(struct pci_dev *pci_dev)
6650 {
6651         int rc;
6652         struct pqi_ctrl_info *ctrl_info;
6653
6654         ctrl_info = pci_get_drvdata(pci_dev);
6655         if (!ctrl_info)
6656                 goto error;
6657
6658         /*
6659          * Write all data in the controller's battery-backed cache to
6660          * storage.
6661          */
6662         rc = pqi_flush_cache(ctrl_info);
6663         if (rc == 0)
6664                 return;
6665
6666 error:
6667         dev_warn(&pci_dev->dev,
6668                 "unable to flush controller cache\n");
6669 }
6670
6671 static void pqi_process_lockup_action_param(void)
6672 {
6673         unsigned int i;
6674
6675         if (!pqi_lockup_action_param)
6676                 return;
6677
6678         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6679                 if (strcmp(pqi_lockup_action_param,
6680                         pqi_lockup_actions[i].name) == 0) {
6681                         pqi_lockup_action = pqi_lockup_actions[i].action;
6682                         return;
6683                 }
6684         }
6685
6686         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6687                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
6688 }
6689
6690 static void pqi_process_module_params(void)
6691 {
6692         pqi_process_lockup_action_param();
6693 }
6694
6695 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6696 {
6697         struct pqi_ctrl_info *ctrl_info;
6698
6699         ctrl_info = pci_get_drvdata(pci_dev);
6700
6701         pqi_disable_events(ctrl_info);
6702         pqi_cancel_update_time_worker(ctrl_info);
6703         pqi_cancel_rescan_worker(ctrl_info);
6704         pqi_wait_until_scan_finished(ctrl_info);
6705         pqi_wait_until_lun_reset_finished(ctrl_info);
6706         pqi_flush_cache(ctrl_info);
6707         pqi_ctrl_block_requests(ctrl_info);
6708         pqi_ctrl_wait_until_quiesced(ctrl_info);
6709         pqi_wait_until_inbound_queues_empty(ctrl_info);
6710         pqi_ctrl_wait_for_pending_io(ctrl_info);
6711         pqi_stop_heartbeat_timer(ctrl_info);
6712
6713         if (state.event == PM_EVENT_FREEZE)
6714                 return 0;
6715
6716         pci_save_state(pci_dev);
6717         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6718
6719         ctrl_info->controller_online = false;
6720         ctrl_info->pqi_mode_enabled = false;
6721
6722         return 0;
6723 }
6724
6725 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6726 {
6727         int rc;
6728         struct pqi_ctrl_info *ctrl_info;
6729
6730         ctrl_info = pci_get_drvdata(pci_dev);
6731
6732         if (pci_dev->current_state != PCI_D0) {
6733                 ctrl_info->max_hw_queue_index = 0;
6734                 pqi_free_interrupts(ctrl_info);
6735                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6736                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6737                         IRQF_SHARED, DRIVER_NAME_SHORT,
6738                         &ctrl_info->queue_groups[0]);
6739                 if (rc) {
6740                         dev_err(&ctrl_info->pci_dev->dev,
6741                                 "irq %u init failed with error %d\n",
6742                                 pci_dev->irq, rc);
6743                         return rc;
6744                 }
6745                 pqi_start_heartbeat_timer(ctrl_info);
6746                 pqi_ctrl_unblock_requests(ctrl_info);
6747                 return 0;
6748         }
6749
6750         pci_set_power_state(pci_dev, PCI_D0);
6751         pci_restore_state(pci_dev);
6752
6753         return pqi_ctrl_init_resume(ctrl_info);
6754 }
6755
6756 /* Define the PCI IDs for the controllers that we support. */
6757 static const struct pci_device_id pqi_pci_id_table[] = {
6758         {
6759                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6760                                0x152d, 0x8a22)
6761         },
6762         {
6763                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6764                                0x152d, 0x8a23)
6765         },
6766         {
6767                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6768                                0x152d, 0x8a24)
6769         },
6770         {
6771                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6772                                0x152d, 0x8a36)
6773         },
6774         {
6775                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6776                                0x152d, 0x8a37)
6777         },
6778         {
6779                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6780                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6781         },
6782         {
6783                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6784                                PCI_VENDOR_ID_ADAPTEC2, 0x0605)
6785         },
6786         {
6787                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6788                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6789         },
6790         {
6791                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6792                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6793         },
6794         {
6795                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6796                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6797         },
6798         {
6799                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6800                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6801         },
6802         {
6803                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6804                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6805         },
6806         {
6807                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6808                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6809         },
6810         {
6811                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6812                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6813         },
6814         {
6815                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6816                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6817         },
6818         {
6819                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6820                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6821         },
6822         {
6823                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6824                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6825         },
6826         {
6827                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6828                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6829         },
6830         {
6831                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6832                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6833         },
6834         {
6835                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6836                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6837         },
6838         {
6839                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6840                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6841         },
6842         {
6843                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6844                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6845         },
6846         {
6847                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6848                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6849         },
6850         {
6851                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6852                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6853         },
6854         {
6855                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6856                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6857         },
6858         {
6859                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6860                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6861         },
6862         {
6863                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6864                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6865         },
6866         {
6867                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6868                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6869         },
6870         {
6871                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6872                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6873         },
6874         {
6875                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6876                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6877         },
6878         {
6879                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6880                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6881         },
6882         {
6883                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6884                                PCI_VENDOR_ID_HP, 0x0600)
6885         },
6886         {
6887                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6888                                PCI_VENDOR_ID_HP, 0x0601)
6889         },
6890         {
6891                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6892                                PCI_VENDOR_ID_HP, 0x0602)
6893         },
6894         {
6895                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6896                                PCI_VENDOR_ID_HP, 0x0603)
6897         },
6898         {
6899                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6900                                PCI_VENDOR_ID_HP, 0x0604)
6901         },
6902         {
6903                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6904                                PCI_VENDOR_ID_HP, 0x0606)
6905         },
6906         {
6907                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6908                                PCI_VENDOR_ID_HP, 0x0650)
6909         },
6910         {
6911                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6912                                PCI_VENDOR_ID_HP, 0x0651)
6913         },
6914         {
6915                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6916                                PCI_VENDOR_ID_HP, 0x0652)
6917         },
6918         {
6919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6920                                PCI_VENDOR_ID_HP, 0x0653)
6921         },
6922         {
6923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6924                                PCI_VENDOR_ID_HP, 0x0654)
6925         },
6926         {
6927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6928                                PCI_VENDOR_ID_HP, 0x0655)
6929         },
6930         {
6931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6932                                PCI_VENDOR_ID_HP, 0x0656)
6933         },
6934         {
6935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6936                                PCI_VENDOR_ID_HP, 0x0657)
6937         },
6938         {
6939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6940                                PCI_VENDOR_ID_HP, 0x0700)
6941         },
6942         {
6943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6944                                PCI_VENDOR_ID_HP, 0x0701)
6945         },
6946         {
6947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6948                                PCI_VENDOR_ID_HP, 0x1001)
6949         },
6950         {
6951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6952                                PCI_VENDOR_ID_HP, 0x1100)
6953         },
6954         {
6955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6956                                PCI_VENDOR_ID_HP, 0x1101)
6957         },
6958         {
6959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6960                                PCI_VENDOR_ID_HP, 0x1102)
6961         },
6962         {
6963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6964                                PCI_VENDOR_ID_HP, 0x1150)
6965         },
6966         {
6967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6968                                PCI_ANY_ID, PCI_ANY_ID)
6969         },
6970         { 0 }
6971 };
6972
6973 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
6974
6975 static struct pci_driver pqi_pci_driver = {
6976         .name = DRIVER_NAME_SHORT,
6977         .id_table = pqi_pci_id_table,
6978         .probe = pqi_pci_probe,
6979         .remove = pqi_pci_remove,
6980         .shutdown = pqi_shutdown,
6981 #if defined(CONFIG_PM)
6982         .suspend = pqi_suspend,
6983         .resume = pqi_resume,
6984 #endif
6985 };
6986
6987 static int __init pqi_init(void)
6988 {
6989         int rc;
6990
6991         pr_info(DRIVER_NAME "\n");
6992
6993         pqi_sas_transport_template =
6994                 sas_attach_transport(&pqi_sas_transport_functions);
6995         if (!pqi_sas_transport_template)
6996                 return -ENODEV;
6997
6998         pqi_process_module_params();
6999
7000         rc = pci_register_driver(&pqi_pci_driver);
7001         if (rc)
7002                 sas_release_transport(pqi_sas_transport_template);
7003
7004         return rc;
7005 }
7006
7007 static void __exit pqi_cleanup(void)
7008 {
7009         pci_unregister_driver(&pqi_pci_driver);
7010         sas_release_transport(pqi_sas_transport_template);
7011 }
7012
7013 module_init(pqi_init);
7014 module_exit(pqi_cleanup);
7015
7016 static void __attribute__((unused)) verify_structures(void)
7017 {
7018         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7019                 sis_host_to_ctrl_doorbell) != 0x20);
7020         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7021                 sis_interrupt_mask) != 0x34);
7022         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7023                 sis_ctrl_to_host_doorbell) != 0x9c);
7024         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7025                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
7026         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7027                 sis_driver_scratch) != 0xb0);
7028         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7029                 sis_firmware_status) != 0xbc);
7030         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7031                 sis_mailbox) != 0x1000);
7032         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7033                 pqi_registers) != 0x4000);
7034
7035         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7036                 iu_type) != 0x0);
7037         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7038                 iu_length) != 0x2);
7039         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7040                 response_queue_id) != 0x4);
7041         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7042                 work_area) != 0x6);
7043         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7044
7045         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7046                 status) != 0x0);
7047         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7048                 service_response) != 0x1);
7049         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7050                 data_present) != 0x2);
7051         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7052                 reserved) != 0x3);
7053         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7054                 residual_count) != 0x4);
7055         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7056                 data_length) != 0x8);
7057         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7058                 reserved1) != 0xa);
7059         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7060                 data) != 0xc);
7061         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7062
7063         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7064                 data_in_result) != 0x0);
7065         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7066                 data_out_result) != 0x1);
7067         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7068                 reserved) != 0x2);
7069         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7070                 status) != 0x5);
7071         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7072                 status_qualifier) != 0x6);
7073         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7074                 sense_data_length) != 0x8);
7075         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7076                 response_data_length) != 0xa);
7077         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7078                 data_in_transferred) != 0xc);
7079         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7080                 data_out_transferred) != 0x10);
7081         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7082                 data) != 0x14);
7083         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7084
7085         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7086                 signature) != 0x0);
7087         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7088                 function_and_status_code) != 0x8);
7089         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7090                 max_admin_iq_elements) != 0x10);
7091         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7092                 max_admin_oq_elements) != 0x11);
7093         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7094                 admin_iq_element_length) != 0x12);
7095         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7096                 admin_oq_element_length) != 0x13);
7097         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7098                 max_reset_timeout) != 0x14);
7099         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7100                 legacy_intx_status) != 0x18);
7101         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7102                 legacy_intx_mask_set) != 0x1c);
7103         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7104                 legacy_intx_mask_clear) != 0x20);
7105         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7106                 device_status) != 0x40);
7107         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7108                 admin_iq_pi_offset) != 0x48);
7109         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7110                 admin_oq_ci_offset) != 0x50);
7111         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7112                 admin_iq_element_array_addr) != 0x58);
7113         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7114                 admin_oq_element_array_addr) != 0x60);
7115         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7116                 admin_iq_ci_addr) != 0x68);
7117         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7118                 admin_oq_pi_addr) != 0x70);
7119         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7120                 admin_iq_num_elements) != 0x78);
7121         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7122                 admin_oq_num_elements) != 0x79);
7123         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7124                 admin_queue_int_msg_num) != 0x7a);
7125         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7126                 device_error) != 0x80);
7127         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7128                 error_details) != 0x88);
7129         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7130                 device_reset) != 0x90);
7131         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7132                 power_action) != 0x94);
7133         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7134
7135         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7136                 header.iu_type) != 0);
7137         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7138                 header.iu_length) != 2);
7139         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7140                 header.work_area) != 6);
7141         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7142                 request_id) != 8);
7143         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7144                 function_code) != 10);
7145         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7146                 data.report_device_capability.buffer_length) != 44);
7147         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7148                 data.report_device_capability.sg_descriptor) != 48);
7149         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7150                 data.create_operational_iq.queue_id) != 12);
7151         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7152                 data.create_operational_iq.element_array_addr) != 16);
7153         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7154                 data.create_operational_iq.ci_addr) != 24);
7155         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7156                 data.create_operational_iq.num_elements) != 32);
7157         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7158                 data.create_operational_iq.element_length) != 34);
7159         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7160                 data.create_operational_iq.queue_protocol) != 36);
7161         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7162                 data.create_operational_oq.queue_id) != 12);
7163         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7164                 data.create_operational_oq.element_array_addr) != 16);
7165         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7166                 data.create_operational_oq.pi_addr) != 24);
7167         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7168                 data.create_operational_oq.num_elements) != 32);
7169         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7170                 data.create_operational_oq.element_length) != 34);
7171         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7172                 data.create_operational_oq.queue_protocol) != 36);
7173         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7174                 data.create_operational_oq.int_msg_num) != 40);
7175         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7176                 data.create_operational_oq.coalescing_count) != 42);
7177         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7178                 data.create_operational_oq.min_coalescing_time) != 44);
7179         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7180                 data.create_operational_oq.max_coalescing_time) != 48);
7181         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7182                 data.delete_operational_queue.queue_id) != 12);
7183         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7184         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7185                 data.create_operational_iq) != 64 - 11);
7186         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7187                 data.create_operational_oq) != 64 - 11);
7188         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7189                 data.delete_operational_queue) != 64 - 11);
7190
7191         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7192                 header.iu_type) != 0);
7193         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7194                 header.iu_length) != 2);
7195         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7196                 header.work_area) != 6);
7197         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7198                 request_id) != 8);
7199         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7200                 function_code) != 10);
7201         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7202                 status) != 11);
7203         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7204                 data.create_operational_iq.status_descriptor) != 12);
7205         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7206                 data.create_operational_iq.iq_pi_offset) != 16);
7207         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7208                 data.create_operational_oq.status_descriptor) != 12);
7209         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7210                 data.create_operational_oq.oq_ci_offset) != 16);
7211         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7212
7213         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7214                 header.iu_type) != 0);
7215         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7216                 header.iu_length) != 2);
7217         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7218                 header.response_queue_id) != 4);
7219         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7220                 header.work_area) != 6);
7221         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7222                 request_id) != 8);
7223         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7224                 nexus_id) != 10);
7225         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7226                 buffer_length) != 12);
7227         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7228                 lun_number) != 16);
7229         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7230                 protocol_specific) != 24);
7231         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7232                 error_index) != 27);
7233         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7234                 cdb) != 32);
7235         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7236                 sg_descriptors) != 64);
7237         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7238                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7239
7240         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7241                 header.iu_type) != 0);
7242         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7243                 header.iu_length) != 2);
7244         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7245                 header.response_queue_id) != 4);
7246         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7247                 header.work_area) != 6);
7248         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7249                 request_id) != 8);
7250         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7251                 nexus_id) != 12);
7252         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7253                 buffer_length) != 16);
7254         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7255                 data_encryption_key_index) != 22);
7256         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7257                 encrypt_tweak_lower) != 24);
7258         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7259                 encrypt_tweak_upper) != 28);
7260         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7261                 cdb) != 32);
7262         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7263                 error_index) != 48);
7264         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7265                 num_sg_descriptors) != 50);
7266         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7267                 cdb_length) != 51);
7268         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7269                 lun_number) != 52);
7270         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7271                 sg_descriptors) != 64);
7272         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7273                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7274
7275         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7276                 header.iu_type) != 0);
7277         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7278                 header.iu_length) != 2);
7279         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7280                 request_id) != 8);
7281         BUILD_BUG_ON(offsetof(struct pqi_io_response,
7282                 error_index) != 10);
7283
7284         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7285                 header.iu_type) != 0);
7286         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7287                 header.iu_length) != 2);
7288         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7289                 header.response_queue_id) != 4);
7290         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7291                 request_id) != 8);
7292         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7293                 data.report_event_configuration.buffer_length) != 12);
7294         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7295                 data.report_event_configuration.sg_descriptors) != 16);
7296         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7297                 data.set_event_configuration.global_event_oq_id) != 10);
7298         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7299                 data.set_event_configuration.buffer_length) != 12);
7300         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7301                 data.set_event_configuration.sg_descriptors) != 16);
7302
7303         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7304                 max_inbound_iu_length) != 6);
7305         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7306                 max_outbound_iu_length) != 14);
7307         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7308
7309         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7310                 data_length) != 0);
7311         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7312                 iq_arbitration_priority_support_bitmask) != 8);
7313         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7314                 maximum_aw_a) != 9);
7315         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7316                 maximum_aw_b) != 10);
7317         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7318                 maximum_aw_c) != 11);
7319         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7320                 max_inbound_queues) != 16);
7321         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7322                 max_elements_per_iq) != 18);
7323         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7324                 max_iq_element_length) != 24);
7325         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7326                 min_iq_element_length) != 26);
7327         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7328                 max_outbound_queues) != 30);
7329         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7330                 max_elements_per_oq) != 32);
7331         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7332                 intr_coalescing_time_granularity) != 34);
7333         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7334                 max_oq_element_length) != 36);
7335         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7336                 min_oq_element_length) != 38);
7337         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7338                 iu_layer_descriptors) != 64);
7339         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7340
7341         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7342                 event_type) != 0);
7343         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7344                 oq_id) != 2);
7345         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7346
7347         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7348                 num_event_descriptors) != 2);
7349         BUILD_BUG_ON(offsetof(struct pqi_event_config,
7350                 descriptors) != 4);
7351
7352         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7353                 ARRAY_SIZE(pqi_supported_event_types));
7354
7355         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7356                 header.iu_type) != 0);
7357         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7358                 header.iu_length) != 2);
7359         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7360                 event_type) != 8);
7361         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7362                 event_id) != 10);
7363         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7364                 additional_event_id) != 12);
7365         BUILD_BUG_ON(offsetof(struct pqi_event_response,
7366                 data) != 16);
7367         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7368
7369         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7370                 header.iu_type) != 0);
7371         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7372                 header.iu_length) != 2);
7373         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7374                 event_type) != 8);
7375         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7376                 event_id) != 10);
7377         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7378                 additional_event_id) != 12);
7379         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7380
7381         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7382                 header.iu_type) != 0);
7383         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7384                 header.iu_length) != 2);
7385         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7386                 request_id) != 8);
7387         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7388                 nexus_id) != 10);
7389         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7390                 lun_number) != 16);
7391         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7392                 protocol_specific) != 24);
7393         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7394                 outbound_queue_id_to_manage) != 26);
7395         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7396                 request_id_to_manage) != 28);
7397         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7398                 task_management_function) != 30);
7399         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7400
7401         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7402                 header.iu_type) != 0);
7403         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7404                 header.iu_length) != 2);
7405         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7406                 request_id) != 8);
7407         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7408                 nexus_id) != 10);
7409         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7410                 additional_response_info) != 12);
7411         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7412                 response_code) != 15);
7413         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7414
7415         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7416                 configured_logical_drive_count) != 0);
7417         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7418                 configuration_signature) != 1);
7419         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7420                 firmware_version) != 5);
7421         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7422                 extended_logical_unit_count) != 154);
7423         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7424                 firmware_build_number) != 190);
7425         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7426                 controller_mode) != 292);
7427
7428         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7429                 phys_bay_in_box) != 115);
7430         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7431                 device_type) != 120);
7432         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7433                 redundant_path_present_map) != 1736);
7434         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7435                 active_path_number) != 1738);
7436         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7437                 alternate_paths_phys_connector) != 1739);
7438         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7439                 alternate_paths_phys_box_on_port) != 1755);
7440         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7441                 current_queue_depth_limit) != 1796);
7442         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7443
7444         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7445         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7446         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7447                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7448         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7449                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7450         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7451         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7452                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7453         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7454         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7455                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7456
7457         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7458         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7459                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7460 }