drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microchip PQI-based storage controllers
   4  *    Copyright (c) 2019-2021 Microchip Technology Inc. and its subsidiaries
   5  *    Copyright (c) 2016-2018 Microsemi Corporation
   6  *    Copyright (c) 2016 PMC-Sierra, Inc.
   7  *
   8  *    Questions/Comments/Bugfixes to storagedev@microchip.com
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/sched.h>
  18 #include <linux/rtc.h>
  19 #include <linux/bcd.h>
  20 #include <linux/reboot.h>
  21 #include <linux/cciss_ioctl.h>
  22 #include <linux/blk-mq-pci.h>
  23 #include <scsi/scsi_host.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_transport_sas.h>
  28 #include <asm/unaligned.h>
  29 #include "smartpqi.h"
  30 #include "smartpqi_sis.h"
  31
  32 #if !defined(BUILD_TIMESTAMP)
  33 #define BUILD_TIMESTAMP
  34 #endif
  35
  36 #define DRIVER_VERSION          "2.1.12-055"
  37 #define DRIVER_MAJOR            2
  38 #define DRIVER_MINOR            1
  39 #define DRIVER_RELEASE          12
  40 #define DRIVER_REVISION         55
  41
  42 #define DRIVER_NAME             "Microchip SmartPQI Driver (v" \
  43                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  44 #define DRIVER_NAME_SHORT       "smartpqi"
  45
  46 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  47
  48 #define PQI_POST_RESET_DELAY_SECS                       5
  49 #define PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS      10
  50
  51 MODULE_AUTHOR("Microchip");
  52 MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
  53         DRIVER_VERSION);
  54 MODULE_VERSION(DRIVER_VERSION);
  55 MODULE_LICENSE("GPL");
  56
  57 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
  58         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason);
  59 static void pqi_ctrl_offline_worker(struct work_struct *work);
  60 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  61 static void pqi_scan_start(struct Scsi_Host *shost);
  62 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  63         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  64         struct pqi_io_request *io_request);
  65 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  66         struct pqi_iu_header *request, unsigned int flags,
  67         struct pqi_raid_error_info *error_info);
  68 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  69         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  70         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  71         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  72 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
  73         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  74         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  75         struct pqi_scsi_dev_raid_map_data *rmd);
  76 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
  77         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
  78         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
  79         struct pqi_scsi_dev_raid_map_data *rmd);
  80 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  81 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  82 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
  83 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
  84 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  85 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  86 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  87         struct pqi_scsi_dev *device, unsigned long timeout_msecs);
  88
  89 /* for flags argument to pqi_submit_raid_request_synchronous() */
  90 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  91
  92 static struct scsi_transport_template *pqi_sas_transport_template;
  93
  94 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  95
  96 enum pqi_lockup_action {
  97         NONE,
  98         REBOOT,
  99         PANIC
 100 };
 101
 102 static enum pqi_lockup_action pqi_lockup_action = NONE;
 103
 104 static struct {
 105         enum pqi_lockup_action  action;
 106         char                    *name;
 107 } pqi_lockup_actions[] = {
 108         {
 109                 .action = NONE,
 110                 .name = "none",
 111         },
 112         {
 113                 .action = REBOOT,
 114                 .name = "reboot",
 115         },
 116         {
 117                 .action = PANIC,
 118                 .name = "panic",
 119         },
 120 };
 121
 122 static unsigned int pqi_supported_event_types[] = {
 123         PQI_EVENT_TYPE_HOTPLUG,
 124         PQI_EVENT_TYPE_HARDWARE,
 125         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 126         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 127         PQI_EVENT_TYPE_OFA,
 128         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 129         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 130 };
 131
 132 static int pqi_disable_device_id_wildcards;
 133 module_param_named(disable_device_id_wildcards,
 134         pqi_disable_device_id_wildcards, int, 0644);
 135 MODULE_PARM_DESC(disable_device_id_wildcards,
 136         "Disable device ID wildcards.");
 137
 138 static int pqi_disable_heartbeat;
 139 module_param_named(disable_heartbeat,
 140         pqi_disable_heartbeat, int, 0644);
 141 MODULE_PARM_DESC(disable_heartbeat,
 142         "Disable heartbeat.");
 143
 144 static int pqi_disable_ctrl_shutdown;
 145 module_param_named(disable_ctrl_shutdown,
 146         pqi_disable_ctrl_shutdown, int, 0644);
 147 MODULE_PARM_DESC(disable_ctrl_shutdown,
 148         "Disable controller shutdown when controller locked up.");
 149
 150 static char *pqi_lockup_action_param;
 151 module_param_named(lockup_action,
 152         pqi_lockup_action_param, charp, 0644);
 153 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 154         "\t\tSupported: none, reboot, panic\n"
 155         "\t\tDefault: none");
 156
 157 static int pqi_expose_ld_first;
 158 module_param_named(expose_ld_first,
 159         pqi_expose_ld_first, int, 0644);
 160 MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
 161
 162 static int pqi_hide_vsep;
 163 module_param_named(hide_vsep,
 164         pqi_hide_vsep, int, 0644);
 165 MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
 166
 167 static char *raid_levels[] = {
 168         "RAID-0",
 169         "RAID-4",
 170         "RAID-1(1+0)",
 171         "RAID-5",
 172         "RAID-5+1",
 173         "RAID-6",
 174         "RAID-1(Triple)",
 175 };
 176
 177 static char *pqi_raid_level_to_string(u8 raid_level)
 178 {
 179         if (raid_level < ARRAY_SIZE(raid_levels))
 180                 return raid_levels[raid_level];
 181
 182         return "RAID UNKNOWN";
 183 }
 184
 185 #define SA_RAID_0               0
 186 #define SA_RAID_4               1
 187 #define SA_RAID_1               2       /* also used for RAID 10 */
 188 #define SA_RAID_5               3       /* also used for RAID 50 */
 189 #define SA_RAID_51              4
 190 #define SA_RAID_6               5       /* also used for RAID 60 */
 191 #define SA_RAID_TRIPLE          6       /* also used for RAID 1+0 Triple */
 192 #define SA_RAID_MAX             SA_RAID_TRIPLE
 193 #define SA_RAID_UNKNOWN         0xff
 194
 195 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 196 {
 197         pqi_prep_for_scsi_done(scmd);
 198         scsi_done(scmd);
 199 }
 200
 201 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 202 {
 203         sdev->no_write_same = 1;
 204 }
 205
 206 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 207 {
 208         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 209 }
 210
 211 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 212 {
 213         return !device->is_physical_device;
 214 }
 215
 216 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 217 {
 218         return scsi3addr[2] != 0;
 219 }
 220
 221 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 222 {
 223         return !ctrl_info->controller_online;
 224 }
 225
 226 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 227 {
 228         if (ctrl_info->controller_online)
 229                 if (!sis_is_firmware_running(ctrl_info))
 230                         pqi_take_ctrl_offline(ctrl_info, PQI_FIRMWARE_KERNEL_NOT_UP);
 231 }
 232
 233 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 234 {
 235         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 236 }
 237
 238 #define PQI_DRIVER_SCRATCH_PQI_MODE                     0x1
 239 #define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED          0x2
 240
 241 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
 242 {
 243         return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
 244 }
 245
 246 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 247         enum pqi_ctrl_mode mode)
 248 {
 249         u32 driver_scratch;
 250
 251         driver_scratch = sis_read_driver_scratch(ctrl_info);
 252
 253         if (mode == PQI_MODE)
 254                 driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
 255         else
 256                 driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
 257
 258         sis_write_driver_scratch(ctrl_info, driver_scratch);
 259 }
 260
 261 static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
 262 {
 263         return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
 264 }
 265
 266 static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
 267 {
 268         u32 driver_scratch;
 269
 270         driver_scratch = sis_read_driver_scratch(ctrl_info);
 271
 272         if (is_supported)
 273                 driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 274         else
 275                 driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
 276
 277         sis_write_driver_scratch(ctrl_info, driver_scratch);
 278 }
 279
 280 static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
 281 {
 282         ctrl_info->scan_blocked = true;
 283         mutex_lock(&ctrl_info->scan_mutex);
 284 }
 285
 286 static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
 287 {
 288         ctrl_info->scan_blocked = false;
 289         mutex_unlock(&ctrl_info->scan_mutex);
 290 }
 291
 292 static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
 293 {
 294         return ctrl_info->scan_blocked;
 295 }
 296
 297 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 298 {
 299         mutex_lock(&ctrl_info->lun_reset_mutex);
 300 }
 301
 302 static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
 303 {
 304         mutex_unlock(&ctrl_info->lun_reset_mutex);
 305 }
 306
 307 static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
 308 {
 309         struct Scsi_Host *shost;
 310         unsigned int num_loops;
 311         int msecs_sleep;
 312
 313         shost = ctrl_info->scsi_host;
 314
 315         scsi_block_requests(shost);
 316
 317         num_loops = 0;
 318         msecs_sleep = 20;
 319         while (scsi_host_busy(shost)) {
 320                 num_loops++;
 321                 if (num_loops == 10)
 322                         msecs_sleep = 500;
 323                 msleep(msecs_sleep);
 324         }
 325 }
 326
 327 static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 328 {
 329         scsi_unblock_requests(ctrl_info->scsi_host);
 330 }
 331
 332 static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 333 {
 334         atomic_inc(&ctrl_info->num_busy_threads);
 335 }
 336
 337 static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 338 {
 339         atomic_dec(&ctrl_info->num_busy_threads);
 340 }
 341
 342 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 343 {
 344         return ctrl_info->block_requests;
 345 }
 346
 347 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 348 {
 349         ctrl_info->block_requests = true;
 350 }
 351
 352 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 353 {
 354         ctrl_info->block_requests = false;
 355         wake_up_all(&ctrl_info->block_requests_wait);
 356 }
 357
 358 static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 359 {
 360         if (!pqi_ctrl_blocked(ctrl_info))
 361                 return;
 362
 363         atomic_inc(&ctrl_info->num_blocked_threads);
 364         wait_event(ctrl_info->block_requests_wait,
 365                 !pqi_ctrl_blocked(ctrl_info));
 366         atomic_dec(&ctrl_info->num_blocked_threads);
 367 }
 368
 369 #define PQI_QUIESCE_WARNING_TIMEOUT_SECS                10
 370
 371 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 372 {
 373         unsigned long start_jiffies;
 374         unsigned long warning_timeout;
 375         bool displayed_warning;
 376
 377         displayed_warning = false;
 378         start_jiffies = jiffies;
 379         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
 380
 381         while (atomic_read(&ctrl_info->num_busy_threads) >
 382                 atomic_read(&ctrl_info->num_blocked_threads)) {
 383                 if (time_after(jiffies, warning_timeout)) {
 384                         dev_warn(&ctrl_info->pci_dev->dev,
 385                                 "waiting %u seconds for driver activity to quiesce\n",
 386                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 387                         displayed_warning = true;
 388                         warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
 389                 }
 390                 usleep_range(1000, 2000);
 391         }
 392
 393         if (displayed_warning)
 394                 dev_warn(&ctrl_info->pci_dev->dev,
 395                         "driver activity quiesced after waiting for %u seconds\n",
 396                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
 397 }
 398
 399 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 400 {
 401         return device->device_offline;
 402 }
 403
 404 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 405 {
 406         mutex_lock(&ctrl_info->ofa_mutex);
 407 }
 408
 409 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 410 {
 411         mutex_unlock(&ctrl_info->ofa_mutex);
 412 }
 413
 414 static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
 415 {
 416         mutex_lock(&ctrl_info->ofa_mutex);
 417         mutex_unlock(&ctrl_info->ofa_mutex);
 418 }
 419
 420 static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
 421 {
 422         return mutex_is_locked(&ctrl_info->ofa_mutex);
 423 }
 424
 425 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 426 {
 427         device->in_remove = true;
 428 }
 429
 430 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
 431 {
 432         return device->in_remove;
 433 }
 434
 435 static inline int pqi_event_type_to_event_index(unsigned int event_type)
 436 {
 437         int index;
 438
 439         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
 440                 if (event_type == pqi_supported_event_types[index])
 441                         return index;
 442
 443         return -1;
 444 }
 445
 446 static inline bool pqi_is_supported_event(unsigned int event_type)
 447 {
 448         return pqi_event_type_to_event_index(event_type) != -1;
 449 }
 450
 451 static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
 452         unsigned long delay)
 453 {
 454         if (pqi_ctrl_offline(ctrl_info))
 455                 return;
 456
 457         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 458 }
 459
 460 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 461 {
 462         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 463 }
 464
 465 #define PQI_RESCAN_WORK_DELAY   (10 * PQI_HZ)
 466
 467 static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
 468 {
 469         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 470 }
 471
 472 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 473 {
 474         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 475 }
 476
 477 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 478 {
 479         if (!ctrl_info->heartbeat_counter)
 480                 return 0;
 481
 482         return readl(ctrl_info->heartbeat_counter);
 483 }
 484
 485 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 486 {
 487         return readb(ctrl_info->soft_reset_status);
 488 }
 489
 490 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 491 {
 492         u8 status;
 493
 494         status = pqi_read_soft_reset_status(ctrl_info);
 495         status &= ~PQI_SOFT_RESET_ABORT;
 496         writeb(status, ctrl_info->soft_reset_status);
 497 }
 498
 499 static int pqi_map_single(struct pci_dev *pci_dev,
 500         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 501         size_t buffer_length, enum dma_data_direction data_direction)
 502 {
 503         dma_addr_t bus_address;
 504
 505         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 506                 return 0;
 507
 508         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 509                 data_direction);
 510         if (dma_mapping_error(&pci_dev->dev, bus_address))
 511                 return -ENOMEM;
 512
 513         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 514         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 515         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 516
 517         return 0;
 518 }
 519
 520 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 521         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 522         enum dma_data_direction data_direction)
 523 {
 524         int i;
 525
 526         if (data_direction == DMA_NONE)
 527                 return;
 528
 529         for (i = 0; i < num_descriptors; i++)
 530                 dma_unmap_single(&pci_dev->dev,
 531                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 532                         get_unaligned_le32(&descriptors[i].length),
 533                         data_direction);
 534 }
 535
 536 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 537         struct pqi_raid_path_request *request, u8 cmd,
 538         u8 *scsi3addr, void *buffer, size_t buffer_length,
 539         u16 vpd_page, enum dma_data_direction *dir)
 540 {
 541         u8 *cdb;
 542         size_t cdb_length = buffer_length;
 543
 544         memset(request, 0, sizeof(*request));
 545
 546         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 547         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 548                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 549                 &request->header.iu_length);
 550         put_unaligned_le32(buffer_length, &request->buffer_length);
 551         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 552         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 553         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 554
 555         cdb = request->cdb;
 556
 557         switch (cmd) {
 558         case TEST_UNIT_READY:
 559                 request->data_direction = SOP_READ_FLAG;
 560                 cdb[0] = TEST_UNIT_READY;
 561                 break;
 562         case INQUIRY:
 563                 request->data_direction = SOP_READ_FLAG;
 564                 cdb[0] = INQUIRY;
 565                 if (vpd_page & VPD_PAGE) {
 566                         cdb[1] = 0x1;
 567                         cdb[2] = (u8)vpd_page;
 568                 }
 569                 cdb[4] = (u8)cdb_length;
 570                 break;
 571         case CISS_REPORT_LOG:
 572         case CISS_REPORT_PHYS:
 573                 request->data_direction = SOP_READ_FLAG;
 574                 cdb[0] = cmd;
 575                 if (cmd == CISS_REPORT_PHYS) {
 576                         if (ctrl_info->rpl_extended_format_4_5_supported)
 577                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
 578                         else
 579                                 cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
 580                 } else {
 581                         cdb[1] = ctrl_info->ciss_report_log_flags;
 582                 }
 583                 put_unaligned_be32(cdb_length, &cdb[6]);
 584                 break;
 585         case CISS_GET_RAID_MAP:
 586                 request->data_direction = SOP_READ_FLAG;
 587                 cdb[0] = CISS_READ;
 588                 cdb[1] = CISS_GET_RAID_MAP;
 589                 put_unaligned_be32(cdb_length, &cdb[6]);
 590                 break;
 591         case SA_FLUSH_CACHE:
 592                 request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
 593                 request->data_direction = SOP_WRITE_FLAG;
 594                 cdb[0] = BMIC_WRITE;
 595                 cdb[6] = BMIC_FLUSH_CACHE;
 596                 put_unaligned_be16(cdb_length, &cdb[7]);
 597                 break;
 598         case BMIC_SENSE_DIAG_OPTIONS:
 599                 cdb_length = 0;
 600                 fallthrough;
 601         case BMIC_IDENTIFY_CONTROLLER:
 602         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 603         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 604         case BMIC_SENSE_FEATURE:
 605                 request->data_direction = SOP_READ_FLAG;
 606                 cdb[0] = BMIC_READ;
 607                 cdb[6] = cmd;
 608                 put_unaligned_be16(cdb_length, &cdb[7]);
 609                 break;
 610         case BMIC_SET_DIAG_OPTIONS:
 611                 cdb_length = 0;
 612                 fallthrough;
 613         case BMIC_WRITE_HOST_WELLNESS:
 614                 request->data_direction = SOP_WRITE_FLAG;
 615                 cdb[0] = BMIC_WRITE;
 616                 cdb[6] = cmd;
 617                 put_unaligned_be16(cdb_length, &cdb[7]);
 618                 break;
 619         case BMIC_CSMI_PASSTHRU:
 620                 request->data_direction = SOP_BIDIRECTIONAL;
 621                 cdb[0] = BMIC_WRITE;
 622                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 623                 cdb[6] = cmd;
 624                 put_unaligned_be16(cdb_length, &cdb[7]);
 625                 break;
 626         default:
 627                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
 628                 break;
 629         }
 630
 631         switch (request->data_direction) {
 632         case SOP_READ_FLAG:
 633                 *dir = DMA_FROM_DEVICE;
 634                 break;
 635         case SOP_WRITE_FLAG:
 636                 *dir = DMA_TO_DEVICE;
 637                 break;
 638         case SOP_NO_DIRECTION_FLAG:
 639                 *dir = DMA_NONE;
 640                 break;
 641         default:
 642                 *dir = DMA_BIDIRECTIONAL;
 643                 break;
 644         }
 645
 646         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 647                 buffer, buffer_length, *dir);
 648 }
 649
 650 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 651 {
 652         io_request->scmd = NULL;
 653         io_request->status = 0;
 654         io_request->error_info = NULL;
 655         io_request->raid_bypass = false;
 656 }
 657
 658 static struct pqi_io_request *pqi_alloc_io_request(
 659         struct pqi_ctrl_info *ctrl_info)
 660 {
 661         struct pqi_io_request *io_request;
 662         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 663
 664         while (1) {
 665                 io_request = &ctrl_info->io_request_pool[i];
 666                 if (atomic_inc_return(&io_request->refcount) == 1)
 667                         break;
 668                 atomic_dec(&io_request->refcount);
 669                 i = (i + 1) % ctrl_info->max_io_slots;
 670         }
 671
 672         /* benignly racy */
 673         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 674
 675         pqi_reinit_io_request(io_request);
 676
 677         return io_request;
 678 }
 679
 680 static void pqi_free_io_request(struct pqi_io_request *io_request)
 681 {
 682         atomic_dec(&io_request->refcount);
 683 }
 684
 685 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 686         u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 687         struct pqi_raid_error_info *error_info)
 688 {
 689         int rc;
 690         struct pqi_raid_path_request request;
 691         enum dma_data_direction dir;
 692
 693         rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
 694                 buffer, buffer_length, vpd_page, &dir);
 695         if (rc)
 696                 return rc;
 697
 698         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
 699
 700         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 701
 702         return rc;
 703 }
 704
 705 /* helper functions for pqi_send_scsi_raid_request */
 706
 707 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 708         u8 cmd, void *buffer, size_t buffer_length)
 709 {
 710         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 711                 buffer, buffer_length, 0, NULL);
 712 }
 713
 714 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 715         u8 cmd, void *buffer, size_t buffer_length,
 716         struct pqi_raid_error_info *error_info)
 717 {
 718         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 719                 buffer, buffer_length, 0, error_info);
 720 }
 721
 722 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 723         struct bmic_identify_controller *buffer)
 724 {
 725         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 726                 buffer, sizeof(*buffer));
 727 }
 728
 729 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 730         struct bmic_sense_subsystem_info *sense_info)
 731 {
 732         return pqi_send_ctrl_raid_request(ctrl_info,
 733                 BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
 734                 sizeof(*sense_info));
 735 }
 736
 737 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 738         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 739 {
 740         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 741                 buffer, buffer_length, vpd_page, NULL);
 742 }
 743
 744 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 745         struct pqi_scsi_dev *device,
 746         struct bmic_identify_physical_device *buffer, size_t buffer_length)
 747 {
 748         int rc;
 749         enum dma_data_direction dir;
 750         u16 bmic_device_index;
 751         struct pqi_raid_path_request request;
 752
 753         rc = pqi_build_raid_path_request(ctrl_info, &request,
 754                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 755                 buffer_length, 0, &dir);
 756         if (rc)
 757                 return rc;
 758
 759         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 760         request.cdb[2] = (u8)bmic_device_index;
 761         request.cdb[9] = (u8)(bmic_device_index >> 8);
 762
 763         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 764
 765         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 766
 767         return rc;
 768 }
 769
 770 static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
 771 {
 772         u32 bytes;
 773
 774         bytes = get_unaligned_le16(limit);
 775         if (bytes == 0)
 776                 bytes = ~0;
 777         else
 778                 bytes *= 1024;
 779
 780         return bytes;
 781 }
 782
 783 #pragma pack(1)
 784
 785 struct bmic_sense_feature_buffer {
 786         struct bmic_sense_feature_buffer_header header;
 787         struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
 788 };
 789
 790 #pragma pack()
 791
 792 #define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH       \
 793         offsetofend(struct bmic_sense_feature_buffer, \
 794                 aio_subpage.max_write_raid_1_10_3drive)
 795
 796 #define MINIMUM_AIO_SUBPAGE_LENGTH      \
 797         (offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
 798                 max_write_raid_1_10_3drive) - \
 799                 sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
 800
 801 static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
 802 {
 803         int rc;
 804         enum dma_data_direction dir;
 805         struct pqi_raid_path_request request;
 806         struct bmic_sense_feature_buffer *buffer;
 807
 808         buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
 809         if (!buffer)
 810                 return -ENOMEM;
 811
 812         rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
 813                 buffer, sizeof(*buffer), 0, &dir);
 814         if (rc)
 815                 goto error;
 816
 817         request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
 818         request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
 819
 820         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
 821
 822         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 823
 824         if (rc)
 825                 goto error;
 826
 827         if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
 828                 buffer->header.subpage_code !=
 829                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 830                 get_unaligned_le16(&buffer->header.buffer_length) <
 831                         MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
 832                 buffer->aio_subpage.header.page_code !=
 833                         BMIC_SENSE_FEATURE_IO_PAGE ||
 834                 buffer->aio_subpage.header.subpage_code !=
 835                         BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
 836                 get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
 837                         MINIMUM_AIO_SUBPAGE_LENGTH) {
 838                 goto error;
 839         }
 840
 841         ctrl_info->max_transfer_encrypted_sas_sata =
 842                 pqi_aio_limit_to_bytes(
 843                         &buffer->aio_subpage.max_transfer_encrypted_sas_sata);
 844
 845         ctrl_info->max_transfer_encrypted_nvme =
 846                 pqi_aio_limit_to_bytes(
 847                         &buffer->aio_subpage.max_transfer_encrypted_nvme);
 848
 849         ctrl_info->max_write_raid_5_6 =
 850                 pqi_aio_limit_to_bytes(
 851                         &buffer->aio_subpage.max_write_raid_5_6);
 852
 853         ctrl_info->max_write_raid_1_10_2drive =
 854                 pqi_aio_limit_to_bytes(
 855                         &buffer->aio_subpage.max_write_raid_1_10_2drive);
 856
 857         ctrl_info->max_write_raid_1_10_3drive =
 858                 pqi_aio_limit_to_bytes(
 859                         &buffer->aio_subpage.max_write_raid_1_10_3drive);
 860
 861 error:
 862         kfree(buffer);
 863
 864         return rc;
 865 }
 866
 867 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 868         enum bmic_flush_cache_shutdown_event shutdown_event)
 869 {
 870         int rc;
 871         struct bmic_flush_cache *flush_cache;
 872
 873         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 874         if (!flush_cache)
 875                 return -ENOMEM;
 876
 877         flush_cache->shutdown_event = shutdown_event;
 878
 879         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 880                 sizeof(*flush_cache));
 881
 882         kfree(flush_cache);
 883
 884         return rc;
 885 }
 886
 887 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 888         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 889         struct pqi_raid_error_info *error_info)
 890 {
 891         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 892                 buffer, buffer_length, error_info);
 893 }
 894
 895 #define PQI_FETCH_PTRAID_DATA           (1 << 31)
 896
 897 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 898 {
 899         int rc;
 900         struct bmic_diag_options *diag;
 901
 902         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 903         if (!diag)
 904                 return -ENOMEM;
 905
 906         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 907                 diag, sizeof(*diag));
 908         if (rc)
 909                 goto out;
 910
 911         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 912
 913         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
 914                 sizeof(*diag));
 915
 916 out:
 917         kfree(diag);
 918
 919         return rc;
 920 }
 921
 922 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 923         void *buffer, size_t buffer_length)
 924 {
 925         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 926                 buffer, buffer_length);
 927 }
 928
 929 #pragma pack(1)
 930
 931 struct bmic_host_wellness_driver_version {
 932         u8      start_tag[4];
 933         u8      driver_version_tag[2];
 934         __le16  driver_version_length;
 935         char    driver_version[32];
 936         u8      dont_write_tag[2];
 937         u8      end_tag[2];
 938 };
 939
 940 #pragma pack()
 941
 942 static int pqi_write_driver_version_to_host_wellness(
 943         struct pqi_ctrl_info *ctrl_info)
 944 {
 945         int rc;
 946         struct bmic_host_wellness_driver_version *buffer;
 947         size_t buffer_length;
 948
 949         buffer_length = sizeof(*buffer);
 950
 951         buffer = kmalloc(buffer_length, GFP_KERNEL);
 952         if (!buffer)
 953                 return -ENOMEM;
 954
 955         buffer->start_tag[0] = '<';
 956         buffer->start_tag[1] = 'H';
 957         buffer->start_tag[2] = 'W';
 958         buffer->start_tag[3] = '>';
 959         buffer->driver_version_tag[0] = 'D';
 960         buffer->driver_version_tag[1] = 'V';
 961         put_unaligned_le16(sizeof(buffer->driver_version),
 962                 &buffer->driver_version_length);
 963         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 964                 sizeof(buffer->driver_version) - 1);
 965         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 966         buffer->dont_write_tag[0] = 'D';
 967         buffer->dont_write_tag[1] = 'W';
 968         buffer->end_tag[0] = 'Z';
 969         buffer->end_tag[1] = 'Z';
 970
 971         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 972
 973         kfree(buffer);
 974
 975         return rc;
 976 }
 977
 978 #pragma pack(1)
 979
 980 struct bmic_host_wellness_time {
 981         u8      start_tag[4];
 982         u8      time_tag[2];
 983         __le16  time_length;
 984         u8      time[8];
 985         u8      dont_write_tag[2];
 986         u8      end_tag[2];
 987 };
 988
 989 #pragma pack()
 990
 991 static int pqi_write_current_time_to_host_wellness(
 992         struct pqi_ctrl_info *ctrl_info)
 993 {
 994         int rc;
 995         struct bmic_host_wellness_time *buffer;
 996         size_t buffer_length;
 997         time64_t local_time;
 998         unsigned int year;
 999         struct tm tm;
1000
1001         buffer_length = sizeof(*buffer);
1002
1003         buffer = kmalloc(buffer_length, GFP_KERNEL);
1004         if (!buffer)
1005                 return -ENOMEM;
1006
1007         buffer->start_tag[0] = '<';
1008         buffer->start_tag[1] = 'H';
1009         buffer->start_tag[2] = 'W';
1010         buffer->start_tag[3] = '>';
1011         buffer->time_tag[0] = 'T';
1012         buffer->time_tag[1] = 'D';
1013         put_unaligned_le16(sizeof(buffer->time),
1014                 &buffer->time_length);
1015
1016         local_time = ktime_get_real_seconds();
1017         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
1018         year = tm.tm_year + 1900;
1019
1020         buffer->time[0] = bin2bcd(tm.tm_hour);
1021         buffer->time[1] = bin2bcd(tm.tm_min);
1022         buffer->time[2] = bin2bcd(tm.tm_sec);
1023         buffer->time[3] = 0;
1024         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
1025         buffer->time[5] = bin2bcd(tm.tm_mday);
1026         buffer->time[6] = bin2bcd(year / 100);
1027         buffer->time[7] = bin2bcd(year % 100);
1028
1029         buffer->dont_write_tag[0] = 'D';
1030         buffer->dont_write_tag[1] = 'W';
1031         buffer->end_tag[0] = 'Z';
1032         buffer->end_tag[1] = 'Z';
1033
1034         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
1035
1036         kfree(buffer);
1037
1038         return rc;
1039 }
1040
1041 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * PQI_HZ)
1042
1043 static void pqi_update_time_worker(struct work_struct *work)
1044 {
1045         int rc;
1046         struct pqi_ctrl_info *ctrl_info;
1047
1048         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1049                 update_time_work);
1050
1051         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
1052         if (rc)
1053                 dev_warn(&ctrl_info->pci_dev->dev,
1054                         "error updating time on controller\n");
1055
1056         schedule_delayed_work(&ctrl_info->update_time_work,
1057                 PQI_UPDATE_TIME_WORK_INTERVAL);
1058 }
1059
1060 static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1061 {
1062         schedule_delayed_work(&ctrl_info->update_time_work, 0);
1063 }
1064
1065 static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
1066 {
1067         cancel_delayed_work_sync(&ctrl_info->update_time_work);
1068 }
1069
1070 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
1071         size_t buffer_length)
1072 {
1073         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
1074 }
1075
1076 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
1077 {
1078         int rc;
1079         size_t lun_list_length;
1080         size_t lun_data_length;
1081         size_t new_lun_list_length;
1082         void *lun_data = NULL;
1083         struct report_lun_header *report_lun_header;
1084
1085         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
1086         if (!report_lun_header) {
1087                 rc = -ENOMEM;
1088                 goto out;
1089         }
1090
1091         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
1092         if (rc)
1093                 goto out;
1094
1095         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
1096
1097 again:
1098         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
1099
1100         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
1101         if (!lun_data) {
1102                 rc = -ENOMEM;
1103                 goto out;
1104         }
1105
1106         if (lun_list_length == 0) {
1107                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
1108                 goto out;
1109         }
1110
1111         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
1112         if (rc)
1113                 goto out;
1114
1115         new_lun_list_length =
1116                 get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
1117
1118         if (new_lun_list_length > lun_list_length) {
1119                 lun_list_length = new_lun_list_length;
1120                 kfree(lun_data);
1121                 goto again;
1122         }
1123
1124 out:
1125         kfree(report_lun_header);
1126
1127         if (rc) {
1128                 kfree(lun_data);
1129                 lun_data = NULL;
1130         }
1131
1132         *buffer = lun_data;
1133
1134         return rc;
1135 }
1136
1137 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1138 {
1139         int rc;
1140         unsigned int i;
1141         u8 rpl_response_format;
1142         u32 num_physicals;
1143         size_t rpl_16byte_wwid_list_length;
1144         void *rpl_list;
1145         struct report_lun_header *rpl_header;
1146         struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
1147         struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
1148
1149         rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
1150         if (rc)
1151                 return rc;
1152
1153         if (ctrl_info->rpl_extended_format_4_5_supported) {
1154                 rpl_header = rpl_list;
1155                 rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
1156                 if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
1157                         *buffer = rpl_list;
1158                         return 0;
1159                 } else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
1160                         dev_err(&ctrl_info->pci_dev->dev,
1161                                 "RPL returned unsupported data format %u\n",
1162                                 rpl_response_format);
1163                         return -EINVAL;
1164                 } else {
1165                         dev_warn(&ctrl_info->pci_dev->dev,
1166                                 "RPL returned extended format 2 instead of 4\n");
1167                 }
1168         }
1169
1170         rpl_8byte_wwid_list = rpl_list;
1171         num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
1172         rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid));
1173
1174         rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL);
1175         if (!rpl_16byte_wwid_list)
1176                 return -ENOMEM;
1177
1178         put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
1179                 &rpl_16byte_wwid_list->header.list_length);
1180         rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
1181
1182         for (i = 0; i < num_physicals; i++) {
1183                 memcpy(&rpl_16byte_wwid_list->lun_entries[i].lunid, &rpl_8byte_wwid_list->lun_entries[i].lunid, sizeof(rpl_8byte_wwid_list->lun_entries[i].lunid));
1184                 memset(&rpl_16byte_wwid_list->lun_entries[i].wwid, 0, 8);
1185                 memcpy(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], &rpl_8byte_wwid_list->lun_entries[i].wwid, sizeof(rpl_8byte_wwid_list->lun_entries[i].wwid));
1186                 rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
1187                 rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
1188                 rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
1189                 rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
1190                 rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
1191         }
1192
1193         kfree(rpl_8byte_wwid_list);
1194         *buffer = rpl_16byte_wwid_list;
1195
1196         return 0;
1197 }
1198
1199 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
1200 {
1201         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
1202 }
1203
1204 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
1205         struct report_phys_lun_16byte_wwid_list **physdev_list,
1206         struct report_log_lun_list **logdev_list)
1207 {
1208         int rc;
1209         size_t logdev_list_length;
1210         size_t logdev_data_length;
1211         struct report_log_lun_list *internal_logdev_list;
1212         struct report_log_lun_list *logdev_data;
1213         struct report_lun_header report_lun_header;
1214
1215         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1216         if (rc)
1217                 dev_err(&ctrl_info->pci_dev->dev,
1218                         "report physical LUNs failed\n");
1219
1220         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1221         if (rc)
1222                 dev_err(&ctrl_info->pci_dev->dev,
1223                         "report logical LUNs failed\n");
1224
1225         /*
1226          * Tack the controller itself onto the end of the logical device list.
1227          */
1228
1229         logdev_data = *logdev_list;
1230
1231         if (logdev_data) {
1232                 logdev_list_length =
1233                         get_unaligned_be32(&logdev_data->header.list_length);
1234         } else {
1235                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1236                 logdev_data =
1237                         (struct report_log_lun_list *)&report_lun_header;
1238                 logdev_list_length = 0;
1239         }
1240
1241         logdev_data_length = sizeof(struct report_lun_header) +
1242                 logdev_list_length;
1243
1244         internal_logdev_list = kmalloc(logdev_data_length +
1245                 sizeof(struct report_log_lun), GFP_KERNEL);
1246         if (!internal_logdev_list) {
1247                 kfree(*logdev_list);
1248                 *logdev_list = NULL;
1249                 return -ENOMEM;
1250         }
1251
1252         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1253         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1254                 sizeof(struct report_log_lun));
1255         put_unaligned_be32(logdev_list_length +
1256                 sizeof(struct report_log_lun),
1257                 &internal_logdev_list->header.list_length);
1258
1259         kfree(*logdev_list);
1260         *logdev_list = internal_logdev_list;
1261
1262         return 0;
1263 }
1264
1265 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1266         int bus, int target, int lun)
1267 {
1268         device->bus = bus;
1269         device->target = target;
1270         device->lun = lun;
1271 }
1272
1273 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1274 {
1275         u8 *scsi3addr;
1276         u32 lunid;
1277         int bus;
1278         int target;
1279         int lun;
1280
1281         scsi3addr = device->scsi3addr;
1282         lunid = get_unaligned_le32(scsi3addr);
1283
1284         if (pqi_is_hba_lunid(scsi3addr)) {
1285                 /* The specified device is the controller. */
1286                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1287                 device->target_lun_valid = true;
1288                 return;
1289         }
1290
1291         if (pqi_is_logical_device(device)) {
1292                 if (device->is_external_raid_device) {
1293                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1294                         target = (lunid >> 16) & 0x3fff;
1295                         lun = lunid & 0xff;
1296                 } else {
1297                         bus = PQI_RAID_VOLUME_BUS;
1298                         target = 0;
1299                         lun = lunid & 0x3fff;
1300                 }
1301                 pqi_set_bus_target_lun(device, bus, target, lun);
1302                 device->target_lun_valid = true;
1303                 return;
1304         }
1305
1306         /*
1307          * Defer target and LUN assignment for non-controller physical devices
1308          * because the SAS transport layer will make these assignments later.
1309          */
1310         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1311 }
1312
1313 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1314         struct pqi_scsi_dev *device)
1315 {
1316         int rc;
1317         u8 raid_level;
1318         u8 *buffer;
1319
1320         raid_level = SA_RAID_UNKNOWN;
1321
1322         buffer = kmalloc(64, GFP_KERNEL);
1323         if (buffer) {
1324                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1325                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1326                 if (rc == 0) {
1327                         raid_level = buffer[8];
1328                         if (raid_level > SA_RAID_MAX)
1329                                 raid_level = SA_RAID_UNKNOWN;
1330                 }
1331                 kfree(buffer);
1332         }
1333
1334         device->raid_level = raid_level;
1335 }
1336
1337 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1338         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1339 {
1340         char *err_msg;
1341         u32 raid_map_size;
1342         u32 r5or6_blocks_per_row;
1343
1344         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1345
1346         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1347                 err_msg = "RAID map too small";
1348                 goto bad_raid_map;
1349         }
1350
1351         if (device->raid_level == SA_RAID_1) {
1352                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1353                         err_msg = "invalid RAID-1 map";
1354                         goto bad_raid_map;
1355                 }
1356         } else if (device->raid_level == SA_RAID_TRIPLE) {
1357                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1358                         err_msg = "invalid RAID-1(Triple) map";
1359                         goto bad_raid_map;
1360                 }
1361         } else if ((device->raid_level == SA_RAID_5 ||
1362                 device->raid_level == SA_RAID_6) &&
1363                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1364                 /* RAID 50/60 */
1365                 r5or6_blocks_per_row =
1366                         get_unaligned_le16(&raid_map->strip_size) *
1367                         get_unaligned_le16(&raid_map->data_disks_per_row);
1368                 if (r5or6_blocks_per_row == 0) {
1369                         err_msg = "invalid RAID-5 or RAID-6 map";
1370                         goto bad_raid_map;
1371                 }
1372         }
1373
1374         return 0;
1375
1376 bad_raid_map:
1377         dev_warn(&ctrl_info->pci_dev->dev,
1378                 "logical device %08x%08x %s\n",
1379                 *((u32 *)&device->scsi3addr),
1380                 *((u32 *)&device->scsi3addr[4]), err_msg);
1381
1382         return -EINVAL;
1383 }
1384
1385 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1386         struct pqi_scsi_dev *device)
1387 {
1388         int rc;
1389         u32 raid_map_size;
1390         struct raid_map *raid_map;
1391
1392         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1393         if (!raid_map)
1394                 return -ENOMEM;
1395
1396         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1397                 device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
1398         if (rc)
1399                 goto error;
1400
1401         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1402
1403         if (raid_map_size > sizeof(*raid_map)) {
1404
1405                 kfree(raid_map);
1406
1407                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1408                 if (!raid_map)
1409                         return -ENOMEM;
1410
1411                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1412                         device->scsi3addr, raid_map, raid_map_size, 0, NULL);
1413                 if (rc)
1414                         goto error;
1415
1416                 if (get_unaligned_le32(&raid_map->structure_size)
1417                         != raid_map_size) {
1418                         dev_warn(&ctrl_info->pci_dev->dev,
1419                                 "requested %u bytes, received %u bytes\n",
1420                                 raid_map_size,
1421                                 get_unaligned_le32(&raid_map->structure_size));
1422                         rc = -EINVAL;
1423                         goto error;
1424                 }
1425         }
1426
1427         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1428         if (rc)
1429                 goto error;
1430
1431         device->raid_map = raid_map;
1432
1433         return 0;
1434
1435 error:
1436         kfree(raid_map);
1437
1438         return rc;
1439 }
1440
1441 static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
1442         struct pqi_scsi_dev *device)
1443 {
1444         if (!ctrl_info->lv_drive_type_mix_valid) {
1445                 device->max_transfer_encrypted = ~0;
1446                 return;
1447         }
1448
1449         switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
1450         case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
1451         case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
1452         case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
1453         case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
1454         case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
1455         case LV_DRIVE_TYPE_MIX_SAS_ONLY:
1456         case LV_DRIVE_TYPE_MIX_SATA_ONLY:
1457                 device->max_transfer_encrypted =
1458                         ctrl_info->max_transfer_encrypted_sas_sata;
1459                 break;
1460         case LV_DRIVE_TYPE_MIX_NVME_ONLY:
1461                 device->max_transfer_encrypted =
1462                         ctrl_info->max_transfer_encrypted_nvme;
1463                 break;
1464         case LV_DRIVE_TYPE_MIX_UNKNOWN:
1465         case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
1466         default:
1467                 device->max_transfer_encrypted =
1468                         min(ctrl_info->max_transfer_encrypted_sas_sata,
1469                                 ctrl_info->max_transfer_encrypted_nvme);
1470                 break;
1471         }
1472 }
1473
1474 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1475         struct pqi_scsi_dev *device)
1476 {
1477         int rc;
1478         u8 *buffer;
1479         u8 bypass_status;
1480
1481         buffer = kmalloc(64, GFP_KERNEL);
1482         if (!buffer)
1483                 return;
1484
1485         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1486                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1487         if (rc)
1488                 goto out;
1489
1490 #define RAID_BYPASS_STATUS              4
1491 #define RAID_BYPASS_CONFIGURED          0x1
1492 #define RAID_BYPASS_ENABLED             0x2
1493
1494         bypass_status = buffer[RAID_BYPASS_STATUS];
1495         device->raid_bypass_configured =
1496                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1497         if (device->raid_bypass_configured &&
1498                 (bypass_status & RAID_BYPASS_ENABLED) &&
1499                 pqi_get_raid_map(ctrl_info, device) == 0) {
1500                 device->raid_bypass_enabled = true;
1501                 if (get_unaligned_le16(&device->raid_map->flags) &
1502                         RAID_MAP_ENCRYPTION_ENABLED)
1503                         pqi_set_max_transfer_encrypted(ctrl_info, device);
1504         }
1505
1506 out:
1507         kfree(buffer);
1508 }
1509
1510 /*
1511  * Use vendor-specific VPD to determine online/offline status of a volume.
1512  */
1513
1514 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1515         struct pqi_scsi_dev *device)
1516 {
1517         int rc;
1518         size_t page_length;
1519         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1520         bool volume_offline = true;
1521         u32 volume_flags;
1522         struct ciss_vpd_logical_volume_status *vpd;
1523
1524         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1525         if (!vpd)
1526                 goto no_buffer;
1527
1528         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1529                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1530         if (rc)
1531                 goto out;
1532
1533         if (vpd->page_code != CISS_VPD_LV_STATUS)
1534                 goto out;
1535
1536         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1537                 volume_status) + vpd->page_length;
1538         if (page_length < sizeof(*vpd))
1539                 goto out;
1540
1541         volume_status = vpd->volume_status;
1542         volume_flags = get_unaligned_be32(&vpd->flags);
1543         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1544
1545 out:
1546         kfree(vpd);
1547 no_buffer:
1548         device->volume_status = volume_status;
1549         device->volume_offline = volume_offline;
1550 }
1551
1552 #define PQI_DEVICE_PHY_MAP_SUPPORTED    0x10
1553
1554 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1555         struct pqi_scsi_dev *device,
1556         struct bmic_identify_physical_device *id_phys)
1557 {
1558         int rc;
1559
1560         memset(id_phys, 0, sizeof(*id_phys));
1561
1562         rc = pqi_identify_physical_device(ctrl_info, device,
1563                 id_phys, sizeof(*id_phys));
1564         if (rc) {
1565                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1566                 return rc;
1567         }
1568
1569         scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1570         scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1571
1572         memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1573         memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1574
1575         device->box_index = id_phys->box_index;
1576         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1577         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1578         device->queue_depth =
1579                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1580         device->active_path_index = id_phys->active_path_number;
1581         device->path_map = id_phys->redundant_path_present_map;
1582         memcpy(&device->box,
1583                 &id_phys->alternate_paths_phys_box_on_port,
1584                 sizeof(device->box));
1585         memcpy(&device->phys_connector,
1586                 &id_phys->alternate_paths_phys_connector,
1587                 sizeof(device->phys_connector));
1588         device->bay = id_phys->phys_bay_in_box;
1589
1590         memcpy(&device->page_83_identifier, &id_phys->page_83_identifier,
1591                 sizeof(device->page_83_identifier));
1592
1593         if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
1594                 id_phys->phy_count)
1595                 device->phy_id =
1596                         id_phys->phy_to_phy_map[device->active_path_index];
1597         else
1598                 device->phy_id = 0xFF;
1599
1600         return 0;
1601 }
1602
1603 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1604         struct pqi_scsi_dev *device)
1605 {
1606         int rc;
1607         u8 *buffer;
1608
1609         buffer = kmalloc(64, GFP_KERNEL);
1610         if (!buffer)
1611                 return -ENOMEM;
1612
1613         /* Send an inquiry to the device to see what it is. */
1614         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1615         if (rc)
1616                 goto out;
1617
1618         scsi_sanitize_inquiry_string(&buffer[8], 8);
1619         scsi_sanitize_inquiry_string(&buffer[16], 16);
1620
1621         device->devtype = buffer[0] & 0x1f;
1622         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1623         memcpy(device->model, &buffer[16], sizeof(device->model));
1624
1625         if (device->devtype == TYPE_DISK) {
1626                 if (device->is_external_raid_device) {
1627                         device->raid_level = SA_RAID_UNKNOWN;
1628                         device->volume_status = CISS_LV_OK;
1629                         device->volume_offline = false;
1630                 } else {
1631                         pqi_get_raid_level(ctrl_info, device);
1632                         pqi_get_raid_bypass_status(ctrl_info, device);
1633                         pqi_get_volume_status(ctrl_info, device);
1634                 }
1635         }
1636
1637 out:
1638         kfree(buffer);
1639
1640         return rc;
1641 }
1642
1643 /*
1644  * Prevent adding drive to OS for some corner cases such as a drive
1645  * undergoing a sanitize operation. Some OSes will continue to poll
1646  * the drive until the sanitize completes, which can take hours,
1647  * resulting in long bootup delays. Commands such as TUR, READ_CAP
1648  * are allowed, but READ/WRITE cause check condition. So the OS
1649  * cannot check/read the partition table.
1650  * Note: devices that have completed sanitize must be re-enabled
1651  *       using the management utility.
1652  */
1653 static bool pqi_keep_device_offline(struct pqi_ctrl_info *ctrl_info,
1654         struct pqi_scsi_dev *device)
1655 {
1656         u8 scsi_status;
1657         int rc;
1658         enum dma_data_direction dir;
1659         char *buffer;
1660         int buffer_length = 64;
1661         size_t sense_data_length;
1662         struct scsi_sense_hdr sshdr;
1663         struct pqi_raid_path_request request;
1664         struct pqi_raid_error_info error_info;
1665         bool offline = false; /* Assume keep online */
1666
1667         /* Do not check controllers. */
1668         if (pqi_is_hba_lunid(device->scsi3addr))
1669                 return false;
1670
1671         /* Do not check LVs. */
1672         if (pqi_is_logical_device(device))
1673                 return false;
1674
1675         buffer = kmalloc(buffer_length, GFP_KERNEL);
1676         if (!buffer)
1677                 return false; /* Assume not offline */
1678
1679         /* Check for SANITIZE in progress using TUR */
1680         rc = pqi_build_raid_path_request(ctrl_info, &request,
1681                 TEST_UNIT_READY, RAID_CTLR_LUNID, buffer,
1682                 buffer_length, 0, &dir);
1683         if (rc)
1684                 goto out; /* Assume not offline */
1685
1686         memcpy(request.lun_number, device->scsi3addr, sizeof(request.lun_number));
1687
1688         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, &error_info);
1689
1690         if (rc)
1691                 goto out; /* Assume not offline */
1692
1693         scsi_status = error_info.status;
1694         sense_data_length = get_unaligned_le16(&error_info.sense_data_length);
1695         if (sense_data_length == 0)
1696                 sense_data_length =
1697                         get_unaligned_le16(&error_info.response_data_length);
1698         if (sense_data_length) {
1699                 if (sense_data_length > sizeof(error_info.data))
1700                         sense_data_length = sizeof(error_info.data);
1701
1702                 /*
1703                  * Check for sanitize in progress: asc:0x04, ascq: 0x1b
1704                  */
1705                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
1706                         scsi_normalize_sense(error_info.data,
1707                                 sense_data_length, &sshdr) &&
1708                                 sshdr.sense_key == NOT_READY &&
1709                                 sshdr.asc == 0x04 &&
1710                                 sshdr.ascq == 0x1b) {
1711                         device->device_offline = true;
1712                         offline = true;
1713                         goto out; /* Keep device offline */
1714                 }
1715         }
1716
1717 out:
1718         kfree(buffer);
1719         return offline;
1720 }
1721
1722 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1723         struct pqi_scsi_dev *device,
1724         struct bmic_identify_physical_device *id_phys)
1725 {
1726         int rc;
1727
1728         if (device->is_expander_smp_device)
1729                 return 0;
1730
1731         if (pqi_is_logical_device(device))
1732                 rc = pqi_get_logical_device_info(ctrl_info, device);
1733         else
1734                 rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1735
1736         return rc;
1737 }
1738
1739 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1740         struct pqi_scsi_dev *device)
1741 {
1742         char *status;
1743         static const char unknown_state_str[] =
1744                 "Volume is in an unknown state (%u)";
1745         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1746
1747         switch (device->volume_status) {
1748         case CISS_LV_OK:
1749                 status = "Volume online";
1750                 break;
1751         case CISS_LV_FAILED:
1752                 status = "Volume failed";
1753                 break;
1754         case CISS_LV_NOT_CONFIGURED:
1755                 status = "Volume not configured";
1756                 break;
1757         case CISS_LV_DEGRADED:
1758                 status = "Volume degraded";
1759                 break;
1760         case CISS_LV_READY_FOR_RECOVERY:
1761                 status = "Volume ready for recovery operation";
1762                 break;
1763         case CISS_LV_UNDERGOING_RECOVERY:
1764                 status = "Volume undergoing recovery";
1765                 break;
1766         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1767                 status = "Wrong physical drive was replaced";
1768                 break;
1769         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1770                 status = "A physical drive not properly connected";
1771                 break;
1772         case CISS_LV_HARDWARE_OVERHEATING:
1773                 status = "Hardware is overheating";
1774                 break;
1775         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1776                 status = "Hardware has overheated";
1777                 break;
1778         case CISS_LV_UNDERGOING_EXPANSION:
1779                 status = "Volume undergoing expansion";
1780                 break;
1781         case CISS_LV_NOT_AVAILABLE:
1782                 status = "Volume waiting for transforming volume";
1783                 break;
1784         case CISS_LV_QUEUED_FOR_EXPANSION:
1785                 status = "Volume queued for expansion";
1786                 break;
1787         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1788                 status = "Volume disabled due to SCSI ID conflict";
1789                 break;
1790         case CISS_LV_EJECTED:
1791                 status = "Volume has been ejected";
1792                 break;
1793         case CISS_LV_UNDERGOING_ERASE:
1794                 status = "Volume undergoing background erase";
1795                 break;
1796         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1797                 status = "Volume ready for predictive spare rebuild";
1798                 break;
1799         case CISS_LV_UNDERGOING_RPI:
1800                 status = "Volume undergoing rapid parity initialization";
1801                 break;
1802         case CISS_LV_PENDING_RPI:
1803                 status = "Volume queued for rapid parity initialization";
1804                 break;
1805         case CISS_LV_ENCRYPTED_NO_KEY:
1806                 status = "Encrypted volume inaccessible - key not present";
1807                 break;
1808         case CISS_LV_UNDERGOING_ENCRYPTION:
1809                 status = "Volume undergoing encryption process";
1810                 break;
1811         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1812                 status = "Volume undergoing encryption re-keying process";
1813                 break;
1814         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1815                 status = "Volume encrypted but encryption is disabled";
1816                 break;
1817         case CISS_LV_PENDING_ENCRYPTION:
1818                 status = "Volume pending migration to encrypted state";
1819                 break;
1820         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1821                 status = "Volume pending encryption rekeying";
1822                 break;
1823         case CISS_LV_NOT_SUPPORTED:
1824                 status = "Volume not supported on this controller";
1825                 break;
1826         case CISS_LV_STATUS_UNAVAILABLE:
1827                 status = "Volume status not available";
1828                 break;
1829         default:
1830                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1831                         unknown_state_str, device->volume_status);
1832                 status = unknown_state_buffer;
1833                 break;
1834         }
1835
1836         dev_info(&ctrl_info->pci_dev->dev,
1837                 "scsi %d:%d:%d:%d %s\n",
1838                 ctrl_info->scsi_host->host_no,
1839                 device->bus, device->target, device->lun, status);
1840 }
1841
1842 static void pqi_rescan_worker(struct work_struct *work)
1843 {
1844         struct pqi_ctrl_info *ctrl_info;
1845
1846         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1847                 rescan_work);
1848
1849         pqi_scan_scsi_devices(ctrl_info);
1850 }
1851
1852 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1853         struct pqi_scsi_dev *device)
1854 {
1855         int rc;
1856
1857         if (pqi_is_logical_device(device))
1858                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1859                         device->target, device->lun);
1860         else
1861                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1862
1863         return rc;
1864 }
1865
1866 #define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS      (20 * 1000)
1867
1868 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
1869 {
1870         int rc;
1871
1872         rc = pqi_device_wait_for_pending_io(ctrl_info, device,
1873                 PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
1874         if (rc)
1875                 dev_err(&ctrl_info->pci_dev->dev,
1876                         "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1877                         ctrl_info->scsi_host->host_no, device->bus,
1878                         device->target, device->lun,
1879                         atomic_read(&device->scsi_cmds_outstanding));
1880
1881         if (pqi_is_logical_device(device))
1882                 scsi_remove_device(device->sdev);
1883         else
1884                 pqi_remove_sas_device(device);
1885
1886         pqi_device_remove_start(device);
1887 }
1888
1889 /* Assumes the SCSI device list lock is held. */
1890
1891 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1892         int bus, int target, int lun)
1893 {
1894         struct pqi_scsi_dev *device;
1895
1896         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1897                 if (device->bus == bus && device->target == target && device->lun == lun)
1898                         return device;
1899
1900         return NULL;
1901 }
1902
1903 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
1904 {
1905         if (dev1->is_physical_device != dev2->is_physical_device)
1906                 return false;
1907
1908         if (dev1->is_physical_device)
1909                 return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
1910
1911         return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
1912 }
1913
1914 enum pqi_find_result {
1915         DEVICE_NOT_FOUND,
1916         DEVICE_CHANGED,
1917         DEVICE_SAME,
1918 };
1919
1920 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1921         struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1922 {
1923         struct pqi_scsi_dev *device;
1924
1925         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1926                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1927                         *matching_device = device;
1928                         if (pqi_device_equal(device_to_find, device)) {
1929                                 if (device_to_find->volume_offline)
1930                                         return DEVICE_CHANGED;
1931                                 return DEVICE_SAME;
1932                         }
1933                         return DEVICE_CHANGED;
1934                 }
1935         }
1936
1937         return DEVICE_NOT_FOUND;
1938 }
1939
1940 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1941 {
1942         if (device->is_expander_smp_device)
1943                 return "Enclosure SMP    ";
1944
1945         return scsi_device_type(device->devtype);
1946 }
1947
1948 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1949
1950 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1951         char *action, struct pqi_scsi_dev *device)
1952 {
1953         ssize_t count;
1954         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1955
1956         count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1957                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1958
1959         if (device->target_lun_valid)
1960                 count += scnprintf(buffer + count,
1961                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1962                         "%d:%d",
1963                         device->target,
1964                         device->lun);
1965         else
1966                 count += scnprintf(buffer + count,
1967                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1968                         "-:-");
1969
1970         if (pqi_is_logical_device(device))
1971                 count += scnprintf(buffer + count,
1972                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1973                         " %08x%08x",
1974                         *((u32 *)&device->scsi3addr),
1975                         *((u32 *)&device->scsi3addr[4]));
1976         else
1977                 count += scnprintf(buffer + count,
1978                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1979                         " %016llx%016llx",
1980                         get_unaligned_be64(&device->wwid[0]),
1981                         get_unaligned_be64(&device->wwid[8]));
1982
1983         count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1984                 " %s %.8s %.16s ",
1985                 pqi_device_type(device),
1986                 device->vendor,
1987                 device->model);
1988
1989         if (pqi_is_logical_device(device)) {
1990                 if (device->devtype == TYPE_DISK)
1991                         count += scnprintf(buffer + count,
1992                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1993                                 "SSDSmartPathCap%c En%c %-12s",
1994                                 device->raid_bypass_configured ? '+' : '-',
1995                                 device->raid_bypass_enabled ? '+' : '-',
1996                                 pqi_raid_level_to_string(device->raid_level));
1997         } else {
1998                 count += scnprintf(buffer + count,
1999                         PQI_DEV_INFO_BUFFER_LENGTH - count,
2000                         "AIO%c", device->aio_enabled ? '+' : '-');
2001                 if (device->devtype == TYPE_DISK ||
2002                         device->devtype == TYPE_ZBC)
2003                         count += scnprintf(buffer + count,
2004                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
2005                                 " qd=%-6d", device->queue_depth);
2006         }
2007
2008         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
2009 }
2010
2011 /* Assumes the SCSI device list lock is held. */
2012
2013 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
2014         struct pqi_scsi_dev *new_device)
2015 {
2016         existing_device->device_type = new_device->device_type;
2017         existing_device->bus = new_device->bus;
2018         if (new_device->target_lun_valid) {
2019                 existing_device->target = new_device->target;
2020                 existing_device->lun = new_device->lun;
2021                 existing_device->target_lun_valid = true;
2022         }
2023
2024         if ((existing_device->volume_status == CISS_LV_QUEUED_FOR_EXPANSION ||
2025                 existing_device->volume_status == CISS_LV_UNDERGOING_EXPANSION) &&
2026                 new_device->volume_status == CISS_LV_OK)
2027                 existing_device->rescan = true;
2028
2029         /* By definition, the scsi3addr and wwid fields are already the same. */
2030
2031         existing_device->is_physical_device = new_device->is_physical_device;
2032         existing_device->is_external_raid_device =
2033                 new_device->is_external_raid_device;
2034         existing_device->is_expander_smp_device =
2035                 new_device->is_expander_smp_device;
2036         existing_device->aio_enabled = new_device->aio_enabled;
2037         memcpy(existing_device->vendor, new_device->vendor,
2038                 sizeof(existing_device->vendor));
2039         memcpy(existing_device->model, new_device->model,
2040                 sizeof(existing_device->model));
2041         existing_device->sas_address = new_device->sas_address;
2042         existing_device->raid_level = new_device->raid_level;
2043         existing_device->queue_depth = new_device->queue_depth;
2044         existing_device->aio_handle = new_device->aio_handle;
2045         existing_device->volume_status = new_device->volume_status;
2046         existing_device->active_path_index = new_device->active_path_index;
2047         existing_device->phy_id = new_device->phy_id;
2048         existing_device->path_map = new_device->path_map;
2049         existing_device->bay = new_device->bay;
2050         existing_device->box_index = new_device->box_index;
2051         existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
2052         existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
2053         memcpy(existing_device->box, new_device->box,
2054                 sizeof(existing_device->box));
2055         memcpy(existing_device->phys_connector, new_device->phys_connector,
2056                 sizeof(existing_device->phys_connector));
2057         existing_device->next_bypass_group = 0;
2058         kfree(existing_device->raid_map);
2059         existing_device->raid_map = new_device->raid_map;
2060         existing_device->raid_bypass_configured =
2061                 new_device->raid_bypass_configured;
2062         existing_device->raid_bypass_enabled =
2063                 new_device->raid_bypass_enabled;
2064         existing_device->device_offline = false;
2065
2066         /* To prevent this from being freed later. */
2067         new_device->raid_map = NULL;
2068 }
2069
2070 static inline void pqi_free_device(struct pqi_scsi_dev *device)
2071 {
2072         if (device) {
2073                 kfree(device->raid_map);
2074                 kfree(device);
2075         }
2076 }
2077
2078 /*
2079  * Called when exposing a new device to the OS fails in order to re-adjust
2080  * our internal SCSI device list to match the SCSI ML's view.
2081  */
2082
2083 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
2084         struct pqi_scsi_dev *device)
2085 {
2086         unsigned long flags;
2087
2088         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2089         list_del(&device->scsi_device_list_entry);
2090         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2091
2092         /* Allow the device structure to be freed later. */
2093         device->keep_device = false;
2094 }
2095
2096 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
2097 {
2098         if (device->is_expander_smp_device)
2099                 return device->sas_port != NULL;
2100
2101         return device->sdev != NULL;
2102 }
2103
2104 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
2105         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
2106 {
2107         int rc;
2108         unsigned int i;
2109         unsigned long flags;
2110         enum pqi_find_result find_result;
2111         struct pqi_scsi_dev *device;
2112         struct pqi_scsi_dev *next;
2113         struct pqi_scsi_dev *matching_device;
2114         LIST_HEAD(add_list);
2115         LIST_HEAD(delete_list);
2116
2117         /*
2118          * The idea here is to do as little work as possible while holding the
2119          * spinlock.  That's why we go to great pains to defer anything other
2120          * than updating the internal device list until after we release the
2121          * spinlock.
2122          */
2123
2124         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2125
2126         /* Assume that all devices in the existing list have gone away. */
2127         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
2128                 device->device_gone = true;
2129
2130         for (i = 0; i < num_new_devices; i++) {
2131                 device = new_device_list[i];
2132
2133                 find_result = pqi_scsi_find_entry(ctrl_info, device,
2134                         &matching_device);
2135
2136                 switch (find_result) {
2137                 case DEVICE_SAME:
2138                         /*
2139                          * The newly found device is already in the existing
2140                          * device list.
2141                          */
2142                         device->new_device = false;
2143                         matching_device->device_gone = false;
2144                         pqi_scsi_update_device(matching_device, device);
2145                         break;
2146                 case DEVICE_NOT_FOUND:
2147                         /*
2148                          * The newly found device is NOT in the existing device
2149                          * list.
2150                          */
2151                         device->new_device = true;
2152                         break;
2153                 case DEVICE_CHANGED:
2154                         /*
2155                          * The original device has gone away and we need to add
2156                          * the new device.
2157                          */
2158                         device->new_device = true;
2159                         break;
2160                 }
2161         }
2162
2163         /* Process all devices that have gone away. */
2164         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2165                 scsi_device_list_entry) {
2166                 if (device->device_gone) {
2167                         list_del(&device->scsi_device_list_entry);
2168                         list_add_tail(&device->delete_list_entry, &delete_list);
2169                 }
2170         }
2171
2172         /* Process all new devices. */
2173         for (i = 0; i < num_new_devices; i++) {
2174                 device = new_device_list[i];
2175                 if (!device->new_device)
2176                         continue;
2177                 if (device->volume_offline)
2178                         continue;
2179                 list_add_tail(&device->scsi_device_list_entry,
2180                         &ctrl_info->scsi_device_list);
2181                 list_add_tail(&device->add_list_entry, &add_list);
2182                 /* To prevent this device structure from being freed later. */
2183                 device->keep_device = true;
2184         }
2185
2186         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2187
2188         /*
2189          * If OFA is in progress and there are devices that need to be deleted,
2190          * allow any pending reset operations to continue and unblock any SCSI
2191          * requests before removal.
2192          */
2193         if (pqi_ofa_in_progress(ctrl_info)) {
2194                 list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
2195                         if (pqi_is_device_added(device))
2196                                 pqi_device_remove_start(device);
2197                 pqi_ctrl_unblock_device_reset(ctrl_info);
2198                 pqi_scsi_unblock_requests(ctrl_info);
2199         }
2200
2201         /* Remove all devices that have gone away. */
2202         list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
2203                 if (device->volume_offline) {
2204                         pqi_dev_info(ctrl_info, "offline", device);
2205                         pqi_show_volume_status(ctrl_info, device);
2206                 } else {
2207                         pqi_dev_info(ctrl_info, "removed", device);
2208                 }
2209                 if (pqi_is_device_added(device))
2210                         pqi_remove_device(ctrl_info, device);
2211                 list_del(&device->delete_list_entry);
2212                 pqi_free_device(device);
2213         }
2214
2215         /*
2216          * Notify the SCSI ML if the queue depth of any existing device has
2217          * changed.
2218          */
2219         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
2220                 if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
2221                         device->advertised_queue_depth = device->queue_depth;
2222                         scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
2223                         if (device->rescan) {
2224                                 scsi_rescan_device(&device->sdev->sdev_gendev);
2225                                 device->rescan = false;
2226                         }
2227                 }
2228         }
2229
2230         /* Expose any new devices. */
2231         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
2232                 if (!pqi_is_device_added(device)) {
2233                         rc = pqi_add_device(ctrl_info, device);
2234                         if (rc == 0) {
2235                                 pqi_dev_info(ctrl_info, "added", device);
2236                         } else {
2237                                 dev_warn(&ctrl_info->pci_dev->dev,
2238                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
2239                                         ctrl_info->scsi_host->host_no,
2240                                         device->bus, device->target,
2241                                         device->lun);
2242                                 pqi_fixup_botched_add(ctrl_info, device);
2243                         }
2244                 }
2245         }
2246 }
2247
2248 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
2249 {
2250         /*
2251          * Only support the HBA controller itself as a RAID
2252          * controller.  If it's a RAID controller other than
2253          * the HBA itself (an external RAID controller, for
2254          * example), we don't support it.
2255          */
2256         if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
2257                 !pqi_is_hba_lunid(device->scsi3addr))
2258                         return false;
2259
2260         return true;
2261 }
2262
2263 static inline bool pqi_skip_device(u8 *scsi3addr)
2264 {
2265         /* Ignore all masked devices. */
2266         if (MASKED_DEVICE(scsi3addr))
2267                 return true;
2268
2269         return false;
2270 }
2271
2272 static inline void pqi_mask_device(u8 *scsi3addr)
2273 {
2274         scsi3addr[3] |= 0xc0;
2275 }
2276
2277 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
2278 {
2279         switch (device->device_type) {
2280         case SA_DEVICE_TYPE_SAS:
2281         case SA_DEVICE_TYPE_EXPANDER_SMP:
2282         case SA_DEVICE_TYPE_SES:
2283                 return true;
2284         }
2285
2286         return false;
2287 }
2288
2289 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
2290 {
2291         return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
2292 }
2293
2294 static inline void pqi_set_physical_device_wwid(struct pqi_ctrl_info *ctrl_info,
2295         struct pqi_scsi_dev *device, struct report_phys_lun_16byte_wwid *phys_lun)
2296 {
2297         if (ctrl_info->unique_wwid_in_report_phys_lun_supported ||
2298                 ctrl_info->rpl_extended_format_4_5_supported ||
2299                 pqi_is_device_with_sas_address(device))
2300                 memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
2301         else
2302                 memcpy(&device->wwid[8], device->page_83_identifier, 8);
2303 }
2304
2305 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2306 {
2307         int i;
2308         int rc;
2309         LIST_HEAD(new_device_list_head);
2310         struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
2311         struct report_log_lun_list *logdev_list = NULL;
2312         struct report_phys_lun_16byte_wwid *phys_lun;
2313         struct report_log_lun *log_lun;
2314         struct bmic_identify_physical_device *id_phys = NULL;
2315         u32 num_physicals;
2316         u32 num_logicals;
2317         struct pqi_scsi_dev **new_device_list = NULL;
2318         struct pqi_scsi_dev *device;
2319         struct pqi_scsi_dev *next;
2320         unsigned int num_new_devices;
2321         unsigned int num_valid_devices;
2322         bool is_physical_device;
2323         u8 *scsi3addr;
2324         unsigned int physical_index;
2325         unsigned int logical_index;
2326         static char *out_of_memory_msg =
2327                 "failed to allocate memory, device discovery stopped";
2328
2329         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
2330         if (rc)
2331                 goto out;
2332
2333         if (physdev_list)
2334                 num_physicals =
2335                         get_unaligned_be32(&physdev_list->header.list_length)
2336                                 / sizeof(physdev_list->lun_entries[0]);
2337         else
2338                 num_physicals = 0;
2339
2340         if (logdev_list)
2341                 num_logicals =
2342                         get_unaligned_be32(&logdev_list->header.list_length)
2343                                 / sizeof(logdev_list->lun_entries[0]);
2344         else
2345                 num_logicals = 0;
2346
2347         if (num_physicals) {
2348                 /*
2349                  * We need this buffer for calls to pqi_get_physical_disk_info()
2350                  * below.  We allocate it here instead of inside
2351                  * pqi_get_physical_disk_info() because it's a fairly large
2352                  * buffer.
2353                  */
2354                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2355                 if (!id_phys) {
2356                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2357                                 out_of_memory_msg);
2358                         rc = -ENOMEM;
2359                         goto out;
2360                 }
2361
2362                 if (pqi_hide_vsep) {
2363                         for (i = num_physicals - 1; i >= 0; i--) {
2364                                 phys_lun = &physdev_list->lun_entries[i];
2365                                 if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
2366                                         pqi_mask_device(phys_lun->lunid);
2367                                         break;
2368                                 }
2369                         }
2370                 }
2371         }
2372
2373         if (num_logicals &&
2374                 (logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
2375                 ctrl_info->lv_drive_type_mix_valid = true;
2376
2377         num_new_devices = num_physicals + num_logicals;
2378
2379         new_device_list = kmalloc_array(num_new_devices,
2380                                         sizeof(*new_device_list),
2381                                         GFP_KERNEL);
2382         if (!new_device_list) {
2383                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2384                 rc = -ENOMEM;
2385                 goto out;
2386         }
2387
2388         for (i = 0; i < num_new_devices; i++) {
2389                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2390                 if (!device) {
2391                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2392                                 out_of_memory_msg);
2393                         rc = -ENOMEM;
2394                         goto out;
2395                 }
2396                 list_add_tail(&device->new_device_list_entry,
2397                         &new_device_list_head);
2398         }
2399
2400         device = NULL;
2401         num_valid_devices = 0;
2402         physical_index = 0;
2403         logical_index = 0;
2404
2405         for (i = 0; i < num_new_devices; i++) {
2406
2407                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2408                         (pqi_expose_ld_first && i >= num_logicals)) {
2409                         is_physical_device = true;
2410                         phys_lun = &physdev_list->lun_entries[physical_index++];
2411                         log_lun = NULL;
2412                         scsi3addr = phys_lun->lunid;
2413                 } else {
2414                         is_physical_device = false;
2415                         phys_lun = NULL;
2416                         log_lun = &logdev_list->lun_entries[logical_index++];
2417                         scsi3addr = log_lun->lunid;
2418                 }
2419
2420                 if (is_physical_device && pqi_skip_device(scsi3addr))
2421                         continue;
2422
2423                 if (device)
2424                         device = list_next_entry(device, new_device_list_entry);
2425                 else
2426                         device = list_first_entry(&new_device_list_head,
2427                                 struct pqi_scsi_dev, new_device_list_entry);
2428
2429                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2430                 device->is_physical_device = is_physical_device;
2431                 if (is_physical_device) {
2432                         device->device_type = phys_lun->device_type;
2433                         if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2434                                 device->is_expander_smp_device = true;
2435                 } else {
2436                         device->is_external_raid_device =
2437                                 pqi_is_external_raid_addr(scsi3addr);
2438                 }
2439
2440                 if (!pqi_is_supported_device(device))
2441                         continue;
2442
2443                 /* Do not present disks that the OS cannot fully probe */
2444                 if (pqi_keep_device_offline(ctrl_info, device))
2445                         continue;
2446
2447                 /* Gather information about the device. */
2448                 rc = pqi_get_device_info(ctrl_info, device, id_phys);
2449                 if (rc == -ENOMEM) {
2450                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2451                                 out_of_memory_msg);
2452                         goto out;
2453                 }
2454                 if (rc) {
2455                         if (device->is_physical_device)
2456                                 dev_warn(&ctrl_info->pci_dev->dev,
2457                                         "obtaining device info failed, skipping physical device %016llx%016llx\n",
2458                                         get_unaligned_be64(&phys_lun->wwid[0]),
2459                                         get_unaligned_be64(&phys_lun->wwid[8]));
2460                         else
2461                                 dev_warn(&ctrl_info->pci_dev->dev,
2462                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2463                                         *((u32 *)&device->scsi3addr),
2464                                         *((u32 *)&device->scsi3addr[4]));
2465                         rc = 0;
2466                         continue;
2467                 }
2468
2469                 pqi_assign_bus_target_lun(device);
2470
2471                 if (device->is_physical_device) {
2472                         pqi_set_physical_device_wwid(ctrl_info, device, phys_lun);
2473                         if ((phys_lun->device_flags &
2474                                 CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2475                                 phys_lun->aio_handle) {
2476                                         device->aio_enabled = true;
2477                                         device->aio_handle =
2478                                                 phys_lun->aio_handle;
2479                         }
2480                 } else {
2481                         memcpy(device->volume_id, log_lun->volume_id,
2482                                 sizeof(device->volume_id));
2483                 }
2484
2485                 if (pqi_is_device_with_sas_address(device))
2486                         device->sas_address = get_unaligned_be64(&device->wwid[8]);
2487
2488                 new_device_list[num_valid_devices++] = device;
2489         }
2490
2491         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2492
2493 out:
2494         list_for_each_entry_safe(device, next, &new_device_list_head,
2495                 new_device_list_entry) {
2496                 if (device->keep_device)
2497                         continue;
2498                 list_del(&device->new_device_list_entry);
2499                 pqi_free_device(device);
2500         }
2501
2502         kfree(new_device_list);
2503         kfree(physdev_list);
2504         kfree(logdev_list);
2505         kfree(id_phys);
2506
2507         return rc;
2508 }
2509
2510 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2511 {
2512         unsigned long flags;
2513         struct pqi_scsi_dev *device;
2514         struct pqi_scsi_dev *next;
2515
2516         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2517
2518         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
2519                 scsi_device_list_entry) {
2520                 if (pqi_is_device_added(device))
2521                         pqi_remove_device(ctrl_info, device);
2522                 list_del(&device->scsi_device_list_entry);
2523                 pqi_free_device(device);
2524         }
2525
2526         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
2527 }
2528
2529 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2530 {
2531         int rc;
2532         int mutex_acquired;
2533
2534         if (pqi_ctrl_offline(ctrl_info))
2535                 return -ENXIO;
2536
2537         mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
2538
2539         if (!mutex_acquired) {
2540                 if (pqi_ctrl_scan_blocked(ctrl_info))
2541                         return -EBUSY;
2542                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2543                 return -EINPROGRESS;
2544         }
2545
2546         rc = pqi_update_scsi_devices(ctrl_info);
2547         if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
2548                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2549
2550         mutex_unlock(&ctrl_info->scan_mutex);
2551
2552         return rc;
2553 }
2554
2555 static void pqi_scan_start(struct Scsi_Host *shost)
2556 {
2557         struct pqi_ctrl_info *ctrl_info;
2558
2559         ctrl_info = shost_to_hba(shost);
2560
2561         pqi_scan_scsi_devices(ctrl_info);
2562 }
2563
2564 /* Returns TRUE if scan is finished. */
2565
2566 static int pqi_scan_finished(struct Scsi_Host *shost,
2567         unsigned long elapsed_time)
2568 {
2569         struct pqi_ctrl_info *ctrl_info;
2570
2571         ctrl_info = shost_priv(shost);
2572
2573         return !mutex_is_locked(&ctrl_info->scan_mutex);
2574 }
2575
2576 static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
2577         struct raid_map *raid_map, u64 first_block)
2578 {
2579         u32 volume_blk_size;
2580
2581         /*
2582          * Set the encryption tweak values based on logical block address.
2583          * If the block size is 512, the tweak value is equal to the LBA.
2584          * For other block sizes, tweak value is (LBA * block size) / 512.
2585          */
2586         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2587         if (volume_blk_size != 512)
2588                 first_block = (first_block * volume_blk_size) / 512;
2589
2590         encryption_info->data_encryption_key_index =
2591                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2592         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2593         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2594 }
2595
2596 /*
2597  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2598  */
2599
2600 static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
2601         struct pqi_scsi_dev_raid_map_data *rmd)
2602 {
2603         bool is_supported = true;
2604
2605         switch (rmd->raid_level) {
2606         case SA_RAID_0:
2607                 break;
2608         case SA_RAID_1:
2609                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2610                         rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
2611                         is_supported = false;
2612                 break;
2613         case SA_RAID_TRIPLE:
2614                 if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
2615                         rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
2616                         is_supported = false;
2617                 break;
2618         case SA_RAID_5:
2619                 if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
2620                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2621                         is_supported = false;
2622                 break;
2623         case SA_RAID_6:
2624                 if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
2625                         rmd->data_length > ctrl_info->max_write_raid_5_6))
2626                         is_supported = false;
2627                 break;
2628         default:
2629                 is_supported = false;
2630                 break;
2631         }
2632
2633         return is_supported;
2634 }
2635
2636 #define PQI_RAID_BYPASS_INELIGIBLE      1
2637
2638 static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
2639         struct pqi_scsi_dev_raid_map_data *rmd)
2640 {
2641         /* Check for valid opcode, get LBA and block count. */
2642         switch (scmd->cmnd[0]) {
2643         case WRITE_6:
2644                 rmd->is_write = true;
2645                 fallthrough;
2646         case READ_6:
2647                 rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2648                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2649                 rmd->block_cnt = (u32)scmd->cmnd[4];
2650                 if (rmd->block_cnt == 0)
2651                         rmd->block_cnt = 256;
2652                 break;
2653         case WRITE_10:
2654                 rmd->is_write = true;
2655                 fallthrough;
2656         case READ_10:
2657                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2658                 rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2659                 break;
2660         case WRITE_12:
2661                 rmd->is_write = true;
2662                 fallthrough;
2663         case READ_12:
2664                 rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2665                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2666                 break;
2667         case WRITE_16:
2668                 rmd->is_write = true;
2669                 fallthrough;
2670         case READ_16:
2671                 rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
2672                 rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2673                 break;
2674         default:
2675                 /* Process via normal I/O path. */
2676                 return PQI_RAID_BYPASS_INELIGIBLE;
2677         }
2678
2679         put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
2680
2681         return 0;
2682 }
2683
2684 static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
2685         struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
2686 {
2687 #if BITS_PER_LONG == 32
2688         u64 tmpdiv;
2689 #endif
2690
2691         rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
2692
2693         /* Check for invalid block or wraparound. */
2694         if (rmd->last_block >=
2695                 get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2696                 rmd->last_block < rmd->first_block)
2697                 return PQI_RAID_BYPASS_INELIGIBLE;
2698
2699         rmd->data_disks_per_row =
2700                 get_unaligned_le16(&raid_map->data_disks_per_row);
2701         rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
2702         rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2703
2704         /* Calculate stripe information for the request. */
2705         rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
2706         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2707                 return PQI_RAID_BYPASS_INELIGIBLE;
2708 #if BITS_PER_LONG == 32
2709         tmpdiv = rmd->first_block;
2710         do_div(tmpdiv, rmd->blocks_per_row);
2711         rmd->first_row = tmpdiv;
2712         tmpdiv = rmd->last_block;
2713         do_div(tmpdiv, rmd->blocks_per_row);
2714         rmd->last_row = tmpdiv;
2715         rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
2716         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
2717         tmpdiv = rmd->first_row_offset;
2718         do_div(tmpdiv, rmd->strip_size);
2719         rmd->first_column = tmpdiv;
2720         tmpdiv = rmd->last_row_offset;
2721         do_div(tmpdiv, rmd->strip_size);
2722         rmd->last_column = tmpdiv;
2723 #else
2724         rmd->first_row = rmd->first_block / rmd->blocks_per_row;
2725         rmd->last_row = rmd->last_block / rmd->blocks_per_row;
2726         rmd->first_row_offset = (u32)(rmd->first_block -
2727                 (rmd->first_row * rmd->blocks_per_row));
2728         rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
2729                 rmd->blocks_per_row));
2730         rmd->first_column = rmd->first_row_offset / rmd->strip_size;
2731         rmd->last_column = rmd->last_row_offset / rmd->strip_size;
2732 #endif
2733
2734         /* If this isn't a single row/column then give to the controller. */
2735         if (rmd->first_row != rmd->last_row ||
2736                 rmd->first_column != rmd->last_column)
2737                 return PQI_RAID_BYPASS_INELIGIBLE;
2738
2739         /* Proceeding with driver mapping. */
2740         rmd->total_disks_per_row = rmd->data_disks_per_row +
2741                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2742         rmd->map_row = ((u32)(rmd->first_row >>
2743                 raid_map->parity_rotation_shift)) %
2744                 get_unaligned_le16(&raid_map->row_cnt);
2745         rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
2746                 rmd->first_column;
2747
2748         return 0;
2749 }
2750
2751 static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
2752         struct raid_map *raid_map)
2753 {
2754 #if BITS_PER_LONG == 32
2755         u64 tmpdiv;
2756 #endif
2757
2758         if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
2759                 return PQI_RAID_BYPASS_INELIGIBLE;
2760
2761         /* RAID 50/60 */
2762         /* Verify first and last block are in same RAID group. */
2763         rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
2764 #if BITS_PER_LONG == 32
2765         tmpdiv = rmd->first_block;
2766         rmd->first_group = do_div(tmpdiv, rmd->stripesize);
2767         tmpdiv = rmd->first_group;
2768         do_div(tmpdiv, rmd->blocks_per_row);
2769         rmd->first_group = tmpdiv;
2770         tmpdiv = rmd->last_block;
2771         rmd->last_group = do_div(tmpdiv, rmd->stripesize);
2772         tmpdiv = rmd->last_group;
2773         do_div(tmpdiv, rmd->blocks_per_row);
2774         rmd->last_group = tmpdiv;
2775 #else
2776         rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
2777         rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
2778 #endif
2779         if (rmd->first_group != rmd->last_group)
2780                 return PQI_RAID_BYPASS_INELIGIBLE;
2781
2782         /* Verify request is in a single row of RAID 5/6. */
2783 #if BITS_PER_LONG == 32
2784         tmpdiv = rmd->first_block;
2785         do_div(tmpdiv, rmd->stripesize);
2786         rmd->first_row = tmpdiv;
2787         rmd->r5or6_first_row = tmpdiv;
2788         tmpdiv = rmd->last_block;
2789         do_div(tmpdiv, rmd->stripesize);
2790         rmd->r5or6_last_row = tmpdiv;
2791 #else
2792         rmd->first_row = rmd->r5or6_first_row =
2793                 rmd->first_block / rmd->stripesize;
2794         rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
2795 #endif
2796         if (rmd->r5or6_first_row != rmd->r5or6_last_row)
2797                 return PQI_RAID_BYPASS_INELIGIBLE;
2798
2799         /* Verify request is in a single column. */
2800 #if BITS_PER_LONG == 32
2801         tmpdiv = rmd->first_block;
2802         rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
2803         tmpdiv = rmd->first_row_offset;
2804         rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
2805         rmd->r5or6_first_row_offset = rmd->first_row_offset;
2806         tmpdiv = rmd->last_block;
2807         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
2808         tmpdiv = rmd->r5or6_last_row_offset;
2809         rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
2810         tmpdiv = rmd->r5or6_first_row_offset;
2811         do_div(tmpdiv, rmd->strip_size);
2812         rmd->first_column = rmd->r5or6_first_column = tmpdiv;
2813         tmpdiv = rmd->r5or6_last_row_offset;
2814         do_div(tmpdiv, rmd->strip_size);
2815         rmd->r5or6_last_column = tmpdiv;
2816 #else
2817         rmd->first_row_offset = rmd->r5or6_first_row_offset =
2818                 (u32)((rmd->first_block % rmd->stripesize) %
2819                 rmd->blocks_per_row);
2820
2821         rmd->r5or6_last_row_offset =
2822                 (u32)((rmd->last_block % rmd->stripesize) %
2823                 rmd->blocks_per_row);
2824
2825         rmd->first_column =
2826                 rmd->r5or6_first_row_offset / rmd->strip_size;
2827         rmd->r5or6_first_column = rmd->first_column;
2828         rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
2829 #endif
2830         if (rmd->r5or6_first_column != rmd->r5or6_last_column)
2831                 return PQI_RAID_BYPASS_INELIGIBLE;
2832
2833         /* Request is eligible. */
2834         rmd->map_row =
2835                 ((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
2836                 get_unaligned_le16(&raid_map->row_cnt);
2837
2838         rmd->map_index = (rmd->first_group *
2839                 (get_unaligned_le16(&raid_map->row_cnt) *
2840                 rmd->total_disks_per_row)) +
2841                 (rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
2842
2843         if (rmd->is_write) {
2844                 u32 index;
2845
2846                 /*
2847                  * p_parity_it_nexus and q_parity_it_nexus are pointers to the
2848                  * parity entries inside the device's raid_map.
2849                  *
2850                  * A device's RAID map is bounded by: number of RAID disks squared.
2851                  *
2852                  * The devices RAID map size is checked during device
2853                  * initialization.
2854                  */
2855                 index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
2856                 index *= rmd->total_disks_per_row;
2857                 index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
2858
2859                 rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
2860                 if (rmd->raid_level == SA_RAID_6) {
2861                         rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
2862                         rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
2863                 }
2864 #if BITS_PER_LONG == 32
2865                 tmpdiv = rmd->first_block;
2866                 do_div(tmpdiv, rmd->blocks_per_row);
2867                 rmd->row = tmpdiv;
2868 #else
2869                 rmd->row = rmd->first_block / rmd->blocks_per_row;
2870 #endif
2871         }
2872
2873         return 0;
2874 }
2875
2876 static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
2877 {
2878         /* Build the new CDB for the physical disk I/O. */
2879         if (rmd->disk_block > 0xffffffff) {
2880                 rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
2881                 rmd->cdb[1] = 0;
2882                 put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
2883                 put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
2884                 rmd->cdb[14] = 0;
2885                 rmd->cdb[15] = 0;
2886                 rmd->cdb_length = 16;
2887         } else {
2888                 rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
2889                 rmd->cdb[1] = 0;
2890                 put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
2891                 rmd->cdb[6] = 0;
2892                 put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
2893                 rmd->cdb[9] = 0;
2894                 rmd->cdb_length = 10;
2895         }
2896 }
2897
2898 static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
2899         struct pqi_scsi_dev_raid_map_data *rmd)
2900 {
2901         u32 index;
2902         u32 group;
2903
2904         group = rmd->map_index / rmd->data_disks_per_row;
2905
2906         index = rmd->map_index - (group * rmd->data_disks_per_row);
2907         rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
2908         index += rmd->data_disks_per_row;
2909         rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
2910         if (rmd->layout_map_count > 2) {
2911                 index += rmd->data_disks_per_row;
2912                 rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
2913         }
2914
2915         rmd->num_it_nexus_entries = rmd->layout_map_count;
2916 }
2917
2918 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2919         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2920         struct pqi_queue_group *queue_group)
2921 {
2922         int rc;
2923         struct raid_map *raid_map;
2924         u32 group;
2925         u32 next_bypass_group;
2926         struct pqi_encryption_info *encryption_info_ptr;
2927         struct pqi_encryption_info encryption_info;
2928         struct pqi_scsi_dev_raid_map_data rmd = { 0 };
2929
2930         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
2931         if (rc)
2932                 return PQI_RAID_BYPASS_INELIGIBLE;
2933
2934         rmd.raid_level = device->raid_level;
2935
2936         if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
2937                 return PQI_RAID_BYPASS_INELIGIBLE;
2938
2939         if (unlikely(rmd.block_cnt == 0))
2940                 return PQI_RAID_BYPASS_INELIGIBLE;
2941
2942         raid_map = device->raid_map;
2943
2944         rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
2945         if (rc)
2946                 return PQI_RAID_BYPASS_INELIGIBLE;
2947
2948         if (device->raid_level == SA_RAID_1 ||
2949                 device->raid_level == SA_RAID_TRIPLE) {
2950                 if (rmd.is_write) {
2951                         pqi_calc_aio_r1_nexus(raid_map, &rmd);
2952                 } else {
2953                         group = device->next_bypass_group;
2954                         next_bypass_group = group + 1;
2955                         if (next_bypass_group >= rmd.layout_map_count)
2956                                 next_bypass_group = 0;
2957                         device->next_bypass_group = next_bypass_group;
2958                         rmd.map_index += group * rmd.data_disks_per_row;
2959                 }
2960         } else if ((device->raid_level == SA_RAID_5 ||
2961                 device->raid_level == SA_RAID_6) &&
2962                 (rmd.layout_map_count > 1 || rmd.is_write)) {
2963                 rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
2964                 if (rc)
2965                         return PQI_RAID_BYPASS_INELIGIBLE;
2966         }
2967
2968         if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
2969                 return PQI_RAID_BYPASS_INELIGIBLE;
2970
2971         rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
2972         rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2973                 rmd.first_row * rmd.strip_size +
2974                 (rmd.first_row_offset - rmd.first_column * rmd.strip_size);
2975         rmd.disk_block_cnt = rmd.block_cnt;
2976
2977         /* Handle differing logical/physical block sizes. */
2978         if (raid_map->phys_blk_shift) {
2979                 rmd.disk_block <<= raid_map->phys_blk_shift;
2980                 rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
2981         }
2982
2983         if (unlikely(rmd.disk_block_cnt > 0xffff))
2984                 return PQI_RAID_BYPASS_INELIGIBLE;
2985
2986         pqi_set_aio_cdb(&rmd);
2987
2988         if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
2989                 if (rmd.data_length > device->max_transfer_encrypted)
2990                         return PQI_RAID_BYPASS_INELIGIBLE;
2991                 pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
2992                 encryption_info_ptr = &encryption_info;
2993         } else {
2994                 encryption_info_ptr = NULL;
2995         }
2996
2997         if (rmd.is_write) {
2998                 switch (device->raid_level) {
2999                 case SA_RAID_1:
3000                 case SA_RAID_TRIPLE:
3001                         return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
3002                                 encryption_info_ptr, device, &rmd);
3003                 case SA_RAID_5:
3004                 case SA_RAID_6:
3005                         return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
3006                                 encryption_info_ptr, device, &rmd);
3007                 }
3008         }
3009
3010         return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
3011                 rmd.cdb, rmd.cdb_length, queue_group,
3012                 encryption_info_ptr, true);
3013 }
3014
3015 #define PQI_STATUS_IDLE         0x0
3016
3017 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
3018 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
3019
3020 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
3021 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
3022 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
3023 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
3024 #define PQI_DEVICE_STATE_ERROR                          0x4
3025
3026 #define PQI_MODE_READY_TIMEOUT_SECS             30
3027 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
3028
3029 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
3030 {
3031         struct pqi_device_registers __iomem *pqi_registers;
3032         unsigned long timeout;
3033         u64 signature;
3034         u8 status;
3035
3036         pqi_registers = ctrl_info->pqi_registers;
3037         timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies;
3038
3039         while (1) {
3040                 signature = readq(&pqi_registers->signature);
3041                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
3042                         sizeof(signature)) == 0)
3043                         break;
3044                 if (time_after(jiffies, timeout)) {
3045                         dev_err(&ctrl_info->pci_dev->dev,
3046                                 "timed out waiting for PQI signature\n");
3047                         return -ETIMEDOUT;
3048                 }
3049                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3050         }
3051
3052         while (1) {
3053                 status = readb(&pqi_registers->function_and_status_code);
3054                 if (status == PQI_STATUS_IDLE)
3055                         break;
3056                 if (time_after(jiffies, timeout)) {
3057                         dev_err(&ctrl_info->pci_dev->dev,
3058                                 "timed out waiting for PQI IDLE\n");
3059                         return -ETIMEDOUT;
3060                 }
3061                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3062         }
3063
3064         while (1) {
3065                 if (readl(&pqi_registers->device_status) ==
3066                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
3067                         break;
3068                 if (time_after(jiffies, timeout)) {
3069                         dev_err(&ctrl_info->pci_dev->dev,
3070                                 "timed out waiting for PQI all registers ready\n");
3071                         return -ETIMEDOUT;
3072                 }
3073                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
3074         }
3075
3076         return 0;
3077 }
3078
3079 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
3080 {
3081         struct pqi_scsi_dev *device;
3082
3083         device = io_request->scmd->device->hostdata;
3084         device->raid_bypass_enabled = false;
3085         device->aio_enabled = false;
3086 }
3087
3088 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
3089 {
3090         struct pqi_ctrl_info *ctrl_info;
3091         struct pqi_scsi_dev *device;
3092
3093         device = sdev->hostdata;
3094         if (device->device_offline)
3095                 return;
3096
3097         device->device_offline = true;
3098         ctrl_info = shost_to_hba(sdev->host);
3099         pqi_schedule_rescan_worker(ctrl_info);
3100         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
3101                 path, ctrl_info->scsi_host->host_no, device->bus,
3102                 device->target, device->lun);
3103 }
3104
3105 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
3106 {
3107         u8 scsi_status;
3108         u8 host_byte;
3109         struct scsi_cmnd *scmd;
3110         struct pqi_raid_error_info *error_info;
3111         size_t sense_data_length;
3112         int residual_count;
3113         int xfer_count;
3114         struct scsi_sense_hdr sshdr;
3115
3116         scmd = io_request->scmd;
3117         if (!scmd)
3118                 return;
3119
3120         error_info = io_request->error_info;
3121         scsi_status = error_info->status;
3122         host_byte = DID_OK;
3123
3124         switch (error_info->data_out_result) {
3125         case PQI_DATA_IN_OUT_GOOD:
3126                 break;
3127         case PQI_DATA_IN_OUT_UNDERFLOW:
3128                 xfer_count =
3129                         get_unaligned_le32(&error_info->data_out_transferred);
3130                 residual_count = scsi_bufflen(scmd) - xfer_count;
3131                 scsi_set_resid(scmd, residual_count);
3132                 if (xfer_count < scmd->underflow)
3133                         host_byte = DID_SOFT_ERROR;
3134                 break;
3135         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
3136         case PQI_DATA_IN_OUT_ABORTED:
3137                 host_byte = DID_ABORT;
3138                 break;
3139         case PQI_DATA_IN_OUT_TIMEOUT:
3140                 host_byte = DID_TIME_OUT;
3141                 break;
3142         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
3143         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
3144         case PQI_DATA_IN_OUT_BUFFER_ERROR:
3145         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
3146         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
3147         case PQI_DATA_IN_OUT_ERROR:
3148         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
3149         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
3150         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
3151         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
3152         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
3153         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
3154         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
3155         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
3156         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
3157         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
3158         default:
3159                 host_byte = DID_ERROR;
3160                 break;
3161         }
3162
3163         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
3164         if (sense_data_length == 0)
3165                 sense_data_length =
3166                         get_unaligned_le16(&error_info->response_data_length);
3167         if (sense_data_length) {
3168                 if (sense_data_length > sizeof(error_info->data))
3169                         sense_data_length = sizeof(error_info->data);
3170
3171                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3172                         scsi_normalize_sense(error_info->data,
3173                                 sense_data_length, &sshdr) &&
3174                                 sshdr.sense_key == HARDWARE_ERROR &&
3175                                 sshdr.asc == 0x3e) {
3176                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
3177                         struct pqi_scsi_dev *device = scmd->device->hostdata;
3178
3179                         switch (sshdr.ascq) {
3180                         case 0x1: /* LOGICAL UNIT FAILURE */
3181                                 if (printk_ratelimit())
3182                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
3183                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3184                                 pqi_take_device_offline(scmd->device, "RAID");
3185                                 host_byte = DID_NO_CONNECT;
3186                                 break;
3187
3188                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
3189                                 if (printk_ratelimit())
3190                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
3191                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
3192                                 break;
3193                         }
3194                 }
3195
3196                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3197                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
3198                 memcpy(scmd->sense_buffer, error_info->data,
3199                         sense_data_length);
3200         }
3201
3202         scmd->result = scsi_status;
3203         set_host_byte(scmd, host_byte);
3204 }
3205
3206 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
3207 {
3208         u8 scsi_status;
3209         u8 host_byte;
3210         struct scsi_cmnd *scmd;
3211         struct pqi_aio_error_info *error_info;
3212         size_t sense_data_length;
3213         int residual_count;
3214         int xfer_count;
3215         bool device_offline;
3216
3217         scmd = io_request->scmd;
3218         error_info = io_request->error_info;
3219         host_byte = DID_OK;
3220         sense_data_length = 0;
3221         device_offline = false;
3222
3223         switch (error_info->service_response) {
3224         case PQI_AIO_SERV_RESPONSE_COMPLETE:
3225                 scsi_status = error_info->status;
3226                 break;
3227         case PQI_AIO_SERV_RESPONSE_FAILURE:
3228                 switch (error_info->status) {
3229                 case PQI_AIO_STATUS_IO_ABORTED:
3230                         scsi_status = SAM_STAT_TASK_ABORTED;
3231                         break;
3232                 case PQI_AIO_STATUS_UNDERRUN:
3233                         scsi_status = SAM_STAT_GOOD;
3234                         residual_count = get_unaligned_le32(
3235                                                 &error_info->residual_count);
3236                         scsi_set_resid(scmd, residual_count);
3237                         xfer_count = scsi_bufflen(scmd) - residual_count;
3238                         if (xfer_count < scmd->underflow)
3239                                 host_byte = DID_SOFT_ERROR;
3240                         break;
3241                 case PQI_AIO_STATUS_OVERRUN:
3242                         scsi_status = SAM_STAT_GOOD;
3243                         break;
3244                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
3245                         pqi_aio_path_disabled(io_request);
3246                         scsi_status = SAM_STAT_GOOD;
3247                         io_request->status = -EAGAIN;
3248                         break;
3249                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
3250                 case PQI_AIO_STATUS_INVALID_DEVICE:
3251                         if (!io_request->raid_bypass) {
3252                                 device_offline = true;
3253                                 pqi_take_device_offline(scmd->device, "AIO");
3254                                 host_byte = DID_NO_CONNECT;
3255                         }
3256                         scsi_status = SAM_STAT_CHECK_CONDITION;
3257                         break;
3258                 case PQI_AIO_STATUS_IO_ERROR:
3259                 default:
3260                         scsi_status = SAM_STAT_CHECK_CONDITION;
3261                         break;
3262                 }
3263                 break;
3264         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
3265         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
3266                 scsi_status = SAM_STAT_GOOD;
3267                 break;
3268         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
3269         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
3270         default:
3271                 scsi_status = SAM_STAT_CHECK_CONDITION;
3272                 break;
3273         }
3274
3275         if (error_info->data_present) {
3276                 sense_data_length =
3277                         get_unaligned_le16(&error_info->data_length);
3278                 if (sense_data_length) {
3279                         if (sense_data_length > sizeof(error_info->data))
3280                                 sense_data_length = sizeof(error_info->data);
3281                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
3282                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
3283                         memcpy(scmd->sense_buffer, error_info->data,
3284                                 sense_data_length);
3285                 }
3286         }
3287
3288         if (device_offline && sense_data_length == 0)
3289                 scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
3290
3291         scmd->result = scsi_status;
3292         set_host_byte(scmd, host_byte);
3293 }
3294
3295 static void pqi_process_io_error(unsigned int iu_type,
3296         struct pqi_io_request *io_request)
3297 {
3298         switch (iu_type) {
3299         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3300                 pqi_process_raid_io_error(io_request);
3301                 break;
3302         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3303                 pqi_process_aio_io_error(io_request);
3304                 break;
3305         }
3306 }
3307
3308 static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
3309         struct pqi_task_management_response *response)
3310 {
3311         int rc;
3312
3313         switch (response->response_code) {
3314         case SOP_TMF_COMPLETE:
3315         case SOP_TMF_FUNCTION_SUCCEEDED:
3316                 rc = 0;
3317                 break;
3318         case SOP_TMF_REJECTED:
3319                 rc = -EAGAIN;
3320                 break;
3321         default:
3322                 rc = -EIO;
3323                 break;
3324         }
3325
3326         if (rc)
3327                 dev_err(&ctrl_info->pci_dev->dev,
3328                         "Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
3329
3330         return rc;
3331 }
3332
3333 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info,
3334         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
3335 {
3336         pqi_take_ctrl_offline(ctrl_info, ctrl_shutdown_reason);
3337 }
3338
3339 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
3340 {
3341         int num_responses;
3342         pqi_index_t oq_pi;
3343         pqi_index_t oq_ci;
3344         struct pqi_io_request *io_request;
3345         struct pqi_io_response *response;
3346         u16 request_id;
3347
3348         num_responses = 0;
3349         oq_ci = queue_group->oq_ci_copy;
3350
3351         while (1) {
3352                 oq_pi = readl(queue_group->oq_pi);
3353                 if (oq_pi >= ctrl_info->num_elements_per_oq) {
3354                         pqi_invalid_response(ctrl_info, PQI_IO_PI_OUT_OF_RANGE);
3355                         dev_err(&ctrl_info->pci_dev->dev,
3356                                 "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3357                                 oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
3358                         return -1;
3359                 }
3360                 if (oq_pi == oq_ci)
3361                         break;
3362
3363                 num_responses++;
3364                 response = queue_group->oq_element_array +
3365                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3366
3367                 request_id = get_unaligned_le16(&response->request_id);
3368                 if (request_id >= ctrl_info->max_io_slots) {
3369                         pqi_invalid_response(ctrl_info, PQI_INVALID_REQ_ID);
3370                         dev_err(&ctrl_info->pci_dev->dev,
3371                                 "request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
3372                                 request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
3373                         return -1;
3374                 }
3375
3376                 io_request = &ctrl_info->io_request_pool[request_id];
3377                 if (atomic_read(&io_request->refcount) == 0) {
3378                         pqi_invalid_response(ctrl_info, PQI_UNMATCHED_REQ_ID);
3379                         dev_err(&ctrl_info->pci_dev->dev,
3380                                 "request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
3381                                 request_id, oq_pi, oq_ci);
3382                         return -1;
3383                 }
3384
3385                 switch (response->header.iu_type) {
3386                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
3387                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
3388                         if (io_request->scmd)
3389                                 io_request->scmd->result = 0;
3390                         fallthrough;
3391                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
3392                         break;
3393                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
3394                         io_request->status =
3395                                 get_unaligned_le16(
3396                                 &((struct pqi_vendor_general_response *)response)->status);
3397                         break;
3398                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
3399                         io_request->status = pqi_interpret_task_management_response(ctrl_info,
3400                                 (void *)response);
3401                         break;
3402                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
3403                         pqi_aio_path_disabled(io_request);
3404                         io_request->status = -EAGAIN;
3405                         break;
3406                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
3407                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
3408                         io_request->error_info = ctrl_info->error_buffer +
3409                                 (get_unaligned_le16(&response->error_index) *
3410                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
3411                         pqi_process_io_error(response->header.iu_type, io_request);
3412                         break;
3413                 default:
3414                         pqi_invalid_response(ctrl_info, PQI_UNEXPECTED_IU_TYPE);
3415                         dev_err(&ctrl_info->pci_dev->dev,
3416                                 "unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
3417                                 response->header.iu_type, oq_pi, oq_ci);
3418                         return -1;
3419                 }
3420
3421                 io_request->io_complete_callback(io_request, io_request->context);
3422
3423                 /*
3424                  * Note that the I/O request structure CANNOT BE TOUCHED after
3425                  * returning from the I/O completion callback!
3426                  */
3427                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
3428         }
3429
3430         if (num_responses) {
3431                 queue_group->oq_ci_copy = oq_ci;
3432                 writel(oq_ci, queue_group->oq_ci);
3433         }
3434
3435         return num_responses;
3436 }
3437
3438 static inline unsigned int pqi_num_elements_free(unsigned int pi,
3439         unsigned int ci, unsigned int elements_in_queue)
3440 {
3441         unsigned int num_elements_used;
3442
3443         if (pi >= ci)
3444                 num_elements_used = pi - ci;
3445         else
3446                 num_elements_used = elements_in_queue - ci + pi;
3447
3448         return elements_in_queue - num_elements_used - 1;
3449 }
3450
3451 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3452         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3453 {
3454         pqi_index_t iq_pi;
3455         pqi_index_t iq_ci;
3456         unsigned long flags;
3457         void *next_element;
3458         struct pqi_queue_group *queue_group;
3459
3460         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3461         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3462
3463         while (1) {
3464                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3465
3466                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3467                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3468
3469                 if (pqi_num_elements_free(iq_pi, iq_ci,
3470                         ctrl_info->num_elements_per_iq))
3471                         break;
3472
3473                 spin_unlock_irqrestore(
3474                         &queue_group->submit_lock[RAID_PATH], flags);
3475
3476                 if (pqi_ctrl_offline(ctrl_info))
3477                         return;
3478         }
3479
3480         next_element = queue_group->iq_element_array[RAID_PATH] +
3481                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3482
3483         memcpy(next_element, iu, iu_length);
3484
3485         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3486         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3487
3488         /*
3489          * This write notifies the controller that an IU is available to be
3490          * processed.
3491          */
3492         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3493
3494         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3495 }
3496
3497 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3498         struct pqi_event *event)
3499 {
3500         struct pqi_event_acknowledge_request request;
3501
3502         memset(&request, 0, sizeof(request));
3503
3504         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3505         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3506                 &request.header.iu_length);
3507         request.event_type = event->event_type;
3508         put_unaligned_le16(event->event_id, &request.event_id);
3509         put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
3510
3511         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3512 }
3513
3514 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3515 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3516
3517 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3518         struct pqi_ctrl_info *ctrl_info)
3519 {
3520         u8 status;
3521         unsigned long timeout;
3522
3523         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies;
3524
3525         while (1) {
3526                 status = pqi_read_soft_reset_status(ctrl_info);
3527                 if (status & PQI_SOFT_RESET_INITIATE)
3528                         return RESET_INITIATE_DRIVER;
3529
3530                 if (status & PQI_SOFT_RESET_ABORT)
3531                         return RESET_ABORT;
3532
3533                 if (!sis_is_firmware_running(ctrl_info))
3534                         return RESET_NORESPONSE;
3535
3536                 if (time_after(jiffies, timeout)) {
3537                         dev_warn(&ctrl_info->pci_dev->dev,
3538                                 "timed out waiting for soft reset status\n");
3539                         return RESET_TIMEDOUT;
3540                 }
3541
3542                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3543         }
3544 }
3545
3546 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
3547 {
3548         int rc;
3549         unsigned int delay_secs;
3550         enum pqi_soft_reset_status reset_status;
3551
3552         if (ctrl_info->soft_reset_handshake_supported)
3553                 reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
3554         else
3555                 reset_status = RESET_INITIATE_FIRMWARE;
3556
3557         delay_secs = PQI_POST_RESET_DELAY_SECS;
3558
3559         switch (reset_status) {
3560         case RESET_TIMEDOUT:
3561                 delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
3562                 fallthrough;
3563         case RESET_INITIATE_DRIVER:
3564                 dev_info(&ctrl_info->pci_dev->dev,
3565                                 "Online Firmware Activation: resetting controller\n");
3566                 sis_soft_reset(ctrl_info);
3567                 fallthrough;
3568         case RESET_INITIATE_FIRMWARE:
3569                 ctrl_info->pqi_mode_enabled = false;
3570                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
3571                 rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
3572                 pqi_ofa_free_host_buffer(ctrl_info);
3573                 pqi_ctrl_ofa_done(ctrl_info);
3574                 dev_info(&ctrl_info->pci_dev->dev,
3575                                 "Online Firmware Activation: %s\n",
3576                                 rc == 0 ? "SUCCESS" : "FAILED");
3577                 break;
3578         case RESET_ABORT:
3579                 dev_info(&ctrl_info->pci_dev->dev,
3580                                 "Online Firmware Activation ABORTED\n");
3581                 if (ctrl_info->soft_reset_handshake_supported)
3582                         pqi_clear_soft_reset_status(ctrl_info);
3583                 pqi_ofa_free_host_buffer(ctrl_info);
3584                 pqi_ctrl_ofa_done(ctrl_info);
3585                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3586                 break;
3587         case RESET_NORESPONSE:
3588                 fallthrough;
3589         default:
3590                 dev_err(&ctrl_info->pci_dev->dev,
3591                         "unexpected Online Firmware Activation reset status: 0x%x\n",
3592                         reset_status);
3593                 pqi_ofa_free_host_buffer(ctrl_info);
3594                 pqi_ctrl_ofa_done(ctrl_info);
3595                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3596                 pqi_take_ctrl_offline(ctrl_info, PQI_OFA_RESPONSE_TIMEOUT);
3597                 break;
3598         }
3599 }
3600
3601 static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
3602 {
3603         struct pqi_ctrl_info *ctrl_info;
3604
3605         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
3606
3607         pqi_ctrl_ofa_start(ctrl_info);
3608         pqi_ofa_setup_host_buffer(ctrl_info);
3609         pqi_ofa_host_memory_update(ctrl_info);
3610 }
3611
3612 static void pqi_ofa_quiesce_worker(struct work_struct *work)
3613 {
3614         struct pqi_ctrl_info *ctrl_info;
3615         struct pqi_event *event;
3616
3617         ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
3618
3619         event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
3620
3621         pqi_ofa_ctrl_quiesce(ctrl_info);
3622         pqi_acknowledge_event(ctrl_info, event);
3623         pqi_process_soft_reset(ctrl_info);
3624 }
3625
3626 static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3627         struct pqi_event *event)
3628 {
3629         bool ack_event;
3630
3631         ack_event = true;
3632
3633         switch (event->event_id) {
3634         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3635                 dev_info(&ctrl_info->pci_dev->dev,
3636                         "received Online Firmware Activation memory allocation request\n");
3637                 schedule_work(&ctrl_info->ofa_memory_alloc_work);
3638                 break;
3639         case PQI_EVENT_OFA_QUIESCE:
3640                 dev_info(&ctrl_info->pci_dev->dev,
3641                         "received Online Firmware Activation quiesce request\n");
3642                 schedule_work(&ctrl_info->ofa_quiesce_work);
3643                 ack_event = false;
3644                 break;
3645         case PQI_EVENT_OFA_CANCELED:
3646                 dev_info(&ctrl_info->pci_dev->dev,
3647                         "received Online Firmware Activation cancel request: reason: %u\n",
3648                         ctrl_info->ofa_cancel_reason);
3649                 pqi_ofa_free_host_buffer(ctrl_info);
3650                 pqi_ctrl_ofa_done(ctrl_info);
3651                 break;
3652         default:
3653                 dev_err(&ctrl_info->pci_dev->dev,
3654                         "received unknown Online Firmware Activation request: event ID: %u\n",
3655                         event->event_id);
3656                 break;
3657         }
3658
3659         return ack_event;
3660 }
3661
3662 static void pqi_event_worker(struct work_struct *work)
3663 {
3664         unsigned int i;
3665         bool rescan_needed;
3666         struct pqi_ctrl_info *ctrl_info;
3667         struct pqi_event *event;
3668         bool ack_event;
3669
3670         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3671
3672         pqi_ctrl_busy(ctrl_info);
3673         pqi_wait_if_ctrl_blocked(ctrl_info);
3674         if (pqi_ctrl_offline(ctrl_info))
3675                 goto out;
3676
3677         rescan_needed = false;
3678         event = ctrl_info->events;
3679         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3680                 if (event->pending) {
3681                         event->pending = false;
3682                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3683                                 ack_event = pqi_ofa_process_event(ctrl_info, event);
3684                         } else {
3685                                 ack_event = true;
3686                                 rescan_needed = true;
3687                         }
3688                         if (ack_event)
3689                                 pqi_acknowledge_event(ctrl_info, event);
3690                 }
3691                 event++;
3692         }
3693
3694         if (rescan_needed)
3695                 pqi_schedule_rescan_worker_delayed(ctrl_info);
3696
3697 out:
3698         pqi_ctrl_unbusy(ctrl_info);
3699 }
3700
3701 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * PQI_HZ)
3702
3703 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3704 {
3705         int num_interrupts;
3706         u32 heartbeat_count;
3707         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
3708
3709         pqi_check_ctrl_health(ctrl_info);
3710         if (pqi_ctrl_offline(ctrl_info))
3711                 return;
3712
3713         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3714         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3715
3716         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3717                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3718                         dev_err(&ctrl_info->pci_dev->dev,
3719                                 "no heartbeat detected - last heartbeat count: %u\n",
3720                                 heartbeat_count);
3721                         pqi_take_ctrl_offline(ctrl_info, PQI_NO_HEARTBEAT);
3722                         return;
3723                 }
3724         } else {
3725                 ctrl_info->previous_num_interrupts = num_interrupts;
3726         }
3727
3728         ctrl_info->previous_heartbeat_count = heartbeat_count;
3729         mod_timer(&ctrl_info->heartbeat_timer,
3730                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3731 }
3732
3733 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3734 {
3735         if (!ctrl_info->heartbeat_counter)
3736                 return;
3737
3738         ctrl_info->previous_num_interrupts =
3739                 atomic_read(&ctrl_info->num_interrupts);
3740         ctrl_info->previous_heartbeat_count =
3741                 pqi_read_heartbeat_counter(ctrl_info);
3742
3743         ctrl_info->heartbeat_timer.expires =
3744                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3745         add_timer(&ctrl_info->heartbeat_timer);
3746 }
3747
3748 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3749 {
3750         del_timer_sync(&ctrl_info->heartbeat_timer);
3751 }
3752
3753 static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
3754         struct pqi_event *event, struct pqi_event_response *response)
3755 {
3756         switch (event->event_id) {
3757         case PQI_EVENT_OFA_MEMORY_ALLOCATION:
3758                 ctrl_info->ofa_bytes_requested =
3759                         get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
3760                 break;
3761         case PQI_EVENT_OFA_CANCELED:
3762                 ctrl_info->ofa_cancel_reason =
3763                         get_unaligned_le16(&response->data.ofa_cancelled.reason);
3764                 break;
3765         }
3766 }
3767
3768 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3769 {
3770         int num_events;
3771         pqi_index_t oq_pi;
3772         pqi_index_t oq_ci;
3773         struct pqi_event_queue *event_queue;
3774         struct pqi_event_response *response;
3775         struct pqi_event *event;
3776         int event_index;
3777
3778         event_queue = &ctrl_info->event_queue;
3779         num_events = 0;
3780         oq_ci = event_queue->oq_ci_copy;
3781
3782         while (1) {
3783                 oq_pi = readl(event_queue->oq_pi);
3784                 if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3785                         pqi_invalid_response(ctrl_info, PQI_EVENT_PI_OUT_OF_RANGE);
3786                         dev_err(&ctrl_info->pci_dev->dev,
3787                                 "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3788                                 oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3789                         return -1;
3790                 }
3791
3792                 if (oq_pi == oq_ci)
3793                         break;
3794
3795                 num_events++;
3796                 response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3797
3798                 event_index = pqi_event_type_to_event_index(response->event_type);
3799
3800                 if (event_index >= 0 && response->request_acknowledge) {
3801                         event = &ctrl_info->events[event_index];
3802                         event->pending = true;
3803                         event->event_type = response->event_type;
3804                         event->event_id = get_unaligned_le16(&response->event_id);
3805                         event->additional_event_id =
3806                                 get_unaligned_le32(&response->additional_event_id);
3807                         if (event->event_type == PQI_EVENT_TYPE_OFA)
3808                                 pqi_ofa_capture_event_payload(ctrl_info, event, response);
3809                 }
3810
3811                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3812         }
3813
3814         if (num_events) {
3815                 event_queue->oq_ci_copy = oq_ci;
3816                 writel(oq_ci, event_queue->oq_ci);
3817                 schedule_work(&ctrl_info->event_work);
3818         }
3819
3820         return num_events;
3821 }
3822
3823 #define PQI_LEGACY_INTX_MASK    0x1
3824
3825 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
3826 {
3827         u32 intx_mask;
3828         struct pqi_device_registers __iomem *pqi_registers;
3829         volatile void __iomem *register_addr;
3830
3831         pqi_registers = ctrl_info->pqi_registers;
3832
3833         if (enable_intx)
3834                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3835         else
3836                 register_addr = &pqi_registers->legacy_intx_mask_set;
3837
3838         intx_mask = readl(register_addr);
3839         intx_mask |= PQI_LEGACY_INTX_MASK;
3840         writel(intx_mask, register_addr);
3841 }
3842
3843 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3844         enum pqi_irq_mode new_mode)
3845 {
3846         switch (ctrl_info->irq_mode) {
3847         case IRQ_MODE_MSIX:
3848                 switch (new_mode) {
3849                 case IRQ_MODE_MSIX:
3850                         break;
3851                 case IRQ_MODE_INTX:
3852                         pqi_configure_legacy_intx(ctrl_info, true);
3853                         sis_enable_intx(ctrl_info);
3854                         break;
3855                 case IRQ_MODE_NONE:
3856                         break;
3857                 }
3858                 break;
3859         case IRQ_MODE_INTX:
3860                 switch (new_mode) {
3861                 case IRQ_MODE_MSIX:
3862                         pqi_configure_legacy_intx(ctrl_info, false);
3863                         sis_enable_msix(ctrl_info);
3864                         break;
3865                 case IRQ_MODE_INTX:
3866                         break;
3867                 case IRQ_MODE_NONE:
3868                         pqi_configure_legacy_intx(ctrl_info, false);
3869                         break;
3870                 }
3871                 break;
3872         case IRQ_MODE_NONE:
3873                 switch (new_mode) {
3874                 case IRQ_MODE_MSIX:
3875                         sis_enable_msix(ctrl_info);
3876                         break;
3877                 case IRQ_MODE_INTX:
3878                         pqi_configure_legacy_intx(ctrl_info, true);
3879                         sis_enable_intx(ctrl_info);
3880                         break;
3881                 case IRQ_MODE_NONE:
3882                         break;
3883                 }
3884                 break;
3885         }
3886
3887         ctrl_info->irq_mode = new_mode;
3888 }
3889
3890 #define PQI_LEGACY_INTX_PENDING         0x1
3891
3892 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3893 {
3894         bool valid_irq;
3895         u32 intx_status;
3896
3897         switch (ctrl_info->irq_mode) {
3898         case IRQ_MODE_MSIX:
3899                 valid_irq = true;
3900                 break;
3901         case IRQ_MODE_INTX:
3902                 intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
3903                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3904                         valid_irq = true;
3905                 else
3906                         valid_irq = false;
3907                 break;
3908         case IRQ_MODE_NONE:
3909         default:
3910                 valid_irq = false;
3911                 break;
3912         }
3913
3914         return valid_irq;
3915 }
3916
3917 static irqreturn_t pqi_irq_handler(int irq, void *data)
3918 {
3919         struct pqi_ctrl_info *ctrl_info;
3920         struct pqi_queue_group *queue_group;
3921         int num_io_responses_handled;
3922         int num_events_handled;
3923
3924         queue_group = data;
3925         ctrl_info = queue_group->ctrl_info;
3926
3927         if (!pqi_is_valid_irq(ctrl_info))
3928                 return IRQ_NONE;
3929
3930         num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3931         if (num_io_responses_handled < 0)
3932                 goto out;
3933
3934         if (irq == ctrl_info->event_irq) {
3935                 num_events_handled = pqi_process_event_intr(ctrl_info);
3936                 if (num_events_handled < 0)
3937                         goto out;
3938         } else {
3939                 num_events_handled = 0;
3940         }
3941
3942         if (num_io_responses_handled + num_events_handled > 0)
3943                 atomic_inc(&ctrl_info->num_interrupts);
3944
3945         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3946         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3947
3948 out:
3949         return IRQ_HANDLED;
3950 }
3951
3952 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3953 {
3954         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3955         int i;
3956         int rc;
3957
3958         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3959
3960         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3961                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3962                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3963                 if (rc) {
3964                         dev_err(&pci_dev->dev,
3965                                 "irq %u init failed with error %d\n",
3966                                 pci_irq_vector(pci_dev, i), rc);
3967                         return rc;
3968                 }
3969                 ctrl_info->num_msix_vectors_initialized++;
3970         }
3971
3972         return 0;
3973 }
3974
3975 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3976 {
3977         int i;
3978
3979         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3980                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3981                         &ctrl_info->queue_groups[i]);
3982
3983         ctrl_info->num_msix_vectors_initialized = 0;
3984 }
3985
3986 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3987 {
3988         int num_vectors_enabled;
3989
3990         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3991                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3992                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3993         if (num_vectors_enabled < 0) {
3994                 dev_err(&ctrl_info->pci_dev->dev,
3995                         "MSI-X init failed with error %d\n",
3996                         num_vectors_enabled);
3997                 return num_vectors_enabled;
3998         }
3999
4000         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
4001         ctrl_info->irq_mode = IRQ_MODE_MSIX;
4002         return 0;
4003 }
4004
4005 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
4006 {
4007         if (ctrl_info->num_msix_vectors_enabled) {
4008                 pci_free_irq_vectors(ctrl_info->pci_dev);
4009                 ctrl_info->num_msix_vectors_enabled = 0;
4010         }
4011 }
4012
4013 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
4014 {
4015         unsigned int i;
4016         size_t alloc_length;
4017         size_t element_array_length_per_iq;
4018         size_t element_array_length_per_oq;
4019         void *element_array;
4020         void __iomem *next_queue_index;
4021         void *aligned_pointer;
4022         unsigned int num_inbound_queues;
4023         unsigned int num_outbound_queues;
4024         unsigned int num_queue_indexes;
4025         struct pqi_queue_group *queue_group;
4026
4027         element_array_length_per_iq =
4028                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
4029                 ctrl_info->num_elements_per_iq;
4030         element_array_length_per_oq =
4031                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
4032                 ctrl_info->num_elements_per_oq;
4033         num_inbound_queues = ctrl_info->num_queue_groups * 2;
4034         num_outbound_queues = ctrl_info->num_queue_groups;
4035         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
4036
4037         aligned_pointer = NULL;
4038
4039         for (i = 0; i < num_inbound_queues; i++) {
4040                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4041                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4042                 aligned_pointer += element_array_length_per_iq;
4043         }
4044
4045         for (i = 0; i < num_outbound_queues; i++) {
4046                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4047                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4048                 aligned_pointer += element_array_length_per_oq;
4049         }
4050
4051         aligned_pointer = PTR_ALIGN(aligned_pointer,
4052                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4053         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4054                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4055
4056         for (i = 0; i < num_queue_indexes; i++) {
4057                 aligned_pointer = PTR_ALIGN(aligned_pointer,
4058                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4059                 aligned_pointer += sizeof(pqi_index_t);
4060         }
4061
4062         alloc_length = (size_t)aligned_pointer +
4063                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4064
4065         alloc_length += PQI_EXTRA_SGL_MEMORY;
4066
4067         ctrl_info->queue_memory_base =
4068                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4069                                    &ctrl_info->queue_memory_base_dma_handle,
4070                                    GFP_KERNEL);
4071
4072         if (!ctrl_info->queue_memory_base)
4073                 return -ENOMEM;
4074
4075         ctrl_info->queue_memory_length = alloc_length;
4076
4077         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
4078                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4079
4080         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4081                 queue_group = &ctrl_info->queue_groups[i];
4082                 queue_group->iq_element_array[RAID_PATH] = element_array;
4083                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
4084                         ctrl_info->queue_memory_base_dma_handle +
4085                                 (element_array - ctrl_info->queue_memory_base);
4086                 element_array += element_array_length_per_iq;
4087                 element_array = PTR_ALIGN(element_array,
4088                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4089                 queue_group->iq_element_array[AIO_PATH] = element_array;
4090                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
4091                         ctrl_info->queue_memory_base_dma_handle +
4092                         (element_array - ctrl_info->queue_memory_base);
4093                 element_array += element_array_length_per_iq;
4094                 element_array = PTR_ALIGN(element_array,
4095                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4096         }
4097
4098         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4099                 queue_group = &ctrl_info->queue_groups[i];
4100                 queue_group->oq_element_array = element_array;
4101                 queue_group->oq_element_array_bus_addr =
4102                         ctrl_info->queue_memory_base_dma_handle +
4103                         (element_array - ctrl_info->queue_memory_base);
4104                 element_array += element_array_length_per_oq;
4105                 element_array = PTR_ALIGN(element_array,
4106                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4107         }
4108
4109         ctrl_info->event_queue.oq_element_array = element_array;
4110         ctrl_info->event_queue.oq_element_array_bus_addr =
4111                 ctrl_info->queue_memory_base_dma_handle +
4112                 (element_array - ctrl_info->queue_memory_base);
4113         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
4114                 PQI_EVENT_OQ_ELEMENT_LENGTH;
4115
4116         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
4117                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
4118
4119         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4120                 queue_group = &ctrl_info->queue_groups[i];
4121                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
4122                 queue_group->iq_ci_bus_addr[RAID_PATH] =
4123                         ctrl_info->queue_memory_base_dma_handle +
4124                         (next_queue_index -
4125                         (void __iomem *)ctrl_info->queue_memory_base);
4126                 next_queue_index += sizeof(pqi_index_t);
4127                 next_queue_index = PTR_ALIGN(next_queue_index,
4128                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4129                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
4130                 queue_group->iq_ci_bus_addr[AIO_PATH] =
4131                         ctrl_info->queue_memory_base_dma_handle +
4132                         (next_queue_index -
4133                         (void __iomem *)ctrl_info->queue_memory_base);
4134                 next_queue_index += sizeof(pqi_index_t);
4135                 next_queue_index = PTR_ALIGN(next_queue_index,
4136                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4137                 queue_group->oq_pi = next_queue_index;
4138                 queue_group->oq_pi_bus_addr =
4139                         ctrl_info->queue_memory_base_dma_handle +
4140                         (next_queue_index -
4141                         (void __iomem *)ctrl_info->queue_memory_base);
4142                 next_queue_index += sizeof(pqi_index_t);
4143                 next_queue_index = PTR_ALIGN(next_queue_index,
4144                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
4145         }
4146
4147         ctrl_info->event_queue.oq_pi = next_queue_index;
4148         ctrl_info->event_queue.oq_pi_bus_addr =
4149                 ctrl_info->queue_memory_base_dma_handle +
4150                 (next_queue_index -
4151                 (void __iomem *)ctrl_info->queue_memory_base);
4152
4153         return 0;
4154 }
4155
4156 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
4157 {
4158         unsigned int i;
4159         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4160         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
4161
4162         /*
4163          * Initialize the backpointers to the controller structure in
4164          * each operational queue group structure.
4165          */
4166         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4167                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
4168
4169         /*
4170          * Assign IDs to all operational queues.  Note that the IDs
4171          * assigned to operational IQs are independent of the IDs
4172          * assigned to operational OQs.
4173          */
4174         ctrl_info->event_queue.oq_id = next_oq_id++;
4175         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4176                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
4177                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
4178                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
4179         }
4180
4181         /*
4182          * Assign MSI-X table entry indexes to all queues.  Note that the
4183          * interrupt for the event queue is shared with the first queue group.
4184          */
4185         ctrl_info->event_queue.int_msg_num = 0;
4186         for (i = 0; i < ctrl_info->num_queue_groups; i++)
4187                 ctrl_info->queue_groups[i].int_msg_num = i;
4188
4189         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4190                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
4191                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
4192                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
4193                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
4194         }
4195 }
4196
4197 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
4198 {
4199         size_t alloc_length;
4200         struct pqi_admin_queues_aligned *admin_queues_aligned;
4201         struct pqi_admin_queues *admin_queues;
4202
4203         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
4204                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
4205
4206         ctrl_info->admin_queue_memory_base =
4207                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
4208                                    &ctrl_info->admin_queue_memory_base_dma_handle,
4209                                    GFP_KERNEL);
4210
4211         if (!ctrl_info->admin_queue_memory_base)
4212                 return -ENOMEM;
4213
4214         ctrl_info->admin_queue_memory_length = alloc_length;
4215
4216         admin_queues = &ctrl_info->admin_queues;
4217         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
4218                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
4219         admin_queues->iq_element_array =
4220                 &admin_queues_aligned->iq_element_array;
4221         admin_queues->oq_element_array =
4222                 &admin_queues_aligned->oq_element_array;
4223         admin_queues->iq_ci =
4224                 (pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
4225         admin_queues->oq_pi =
4226                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
4227
4228         admin_queues->iq_element_array_bus_addr =
4229                 ctrl_info->admin_queue_memory_base_dma_handle +
4230                 (admin_queues->iq_element_array -
4231                 ctrl_info->admin_queue_memory_base);
4232         admin_queues->oq_element_array_bus_addr =
4233                 ctrl_info->admin_queue_memory_base_dma_handle +
4234                 (admin_queues->oq_element_array -
4235                 ctrl_info->admin_queue_memory_base);
4236         admin_queues->iq_ci_bus_addr =
4237                 ctrl_info->admin_queue_memory_base_dma_handle +
4238                 ((void __iomem *)admin_queues->iq_ci -
4239                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4240         admin_queues->oq_pi_bus_addr =
4241                 ctrl_info->admin_queue_memory_base_dma_handle +
4242                 ((void __iomem *)admin_queues->oq_pi -
4243                 (void __iomem *)ctrl_info->admin_queue_memory_base);
4244
4245         return 0;
4246 }
4247
4248 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          PQI_HZ
4249 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
4250
4251 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
4252 {
4253         struct pqi_device_registers __iomem *pqi_registers;
4254         struct pqi_admin_queues *admin_queues;
4255         unsigned long timeout;
4256         u8 status;
4257         u32 reg;
4258
4259         pqi_registers = ctrl_info->pqi_registers;
4260         admin_queues = &ctrl_info->admin_queues;
4261
4262         writeq((u64)admin_queues->iq_element_array_bus_addr,
4263                 &pqi_registers->admin_iq_element_array_addr);
4264         writeq((u64)admin_queues->oq_element_array_bus_addr,
4265                 &pqi_registers->admin_oq_element_array_addr);
4266         writeq((u64)admin_queues->iq_ci_bus_addr,
4267                 &pqi_registers->admin_iq_ci_addr);
4268         writeq((u64)admin_queues->oq_pi_bus_addr,
4269                 &pqi_registers->admin_oq_pi_addr);
4270
4271         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
4272                 (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
4273                 (admin_queues->int_msg_num << 16);
4274         writel(reg, &pqi_registers->admin_iq_num_elements);
4275
4276         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
4277                 &pqi_registers->function_and_status_code);
4278
4279         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
4280         while (1) {
4281                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
4282                 status = readb(&pqi_registers->function_and_status_code);
4283                 if (status == PQI_STATUS_IDLE)
4284                         break;
4285                 if (time_after(jiffies, timeout))
4286                         return -ETIMEDOUT;
4287         }
4288
4289         /*
4290          * The offset registers are not initialized to the correct
4291          * offsets until *after* the create admin queue pair command
4292          * completes successfully.
4293          */
4294         admin_queues->iq_pi = ctrl_info->iomem_base +
4295                 PQI_DEVICE_REGISTERS_OFFSET +
4296                 readq(&pqi_registers->admin_iq_pi_offset);
4297         admin_queues->oq_ci = ctrl_info->iomem_base +
4298                 PQI_DEVICE_REGISTERS_OFFSET +
4299                 readq(&pqi_registers->admin_oq_ci_offset);
4300
4301         return 0;
4302 }
4303
4304 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
4305         struct pqi_general_admin_request *request)
4306 {
4307         struct pqi_admin_queues *admin_queues;
4308         void *next_element;
4309         pqi_index_t iq_pi;
4310
4311         admin_queues = &ctrl_info->admin_queues;
4312         iq_pi = admin_queues->iq_pi_copy;
4313
4314         next_element = admin_queues->iq_element_array +
4315                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
4316
4317         memcpy(next_element, request, sizeof(*request));
4318
4319         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
4320         admin_queues->iq_pi_copy = iq_pi;
4321
4322         /*
4323          * This write notifies the controller that an IU is available to be
4324          * processed.
4325          */
4326         writel(iq_pi, admin_queues->iq_pi);
4327 }
4328
4329 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
4330
4331 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
4332         struct pqi_general_admin_response *response)
4333 {
4334         struct pqi_admin_queues *admin_queues;
4335         pqi_index_t oq_pi;
4336         pqi_index_t oq_ci;
4337         unsigned long timeout;
4338
4339         admin_queues = &ctrl_info->admin_queues;
4340         oq_ci = admin_queues->oq_ci_copy;
4341
4342         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies;
4343
4344         while (1) {
4345                 oq_pi = readl(admin_queues->oq_pi);
4346                 if (oq_pi != oq_ci)
4347                         break;
4348                 if (time_after(jiffies, timeout)) {
4349                         dev_err(&ctrl_info->pci_dev->dev,
4350                                 "timed out waiting for admin response\n");
4351                         return -ETIMEDOUT;
4352                 }
4353                 if (!sis_is_firmware_running(ctrl_info))
4354                         return -ENXIO;
4355                 usleep_range(1000, 2000);
4356         }
4357
4358         memcpy(response, admin_queues->oq_element_array +
4359                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
4360
4361         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
4362         admin_queues->oq_ci_copy = oq_ci;
4363         writel(oq_ci, admin_queues->oq_ci);
4364
4365         return 0;
4366 }
4367
4368 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
4369         struct pqi_queue_group *queue_group, enum pqi_io_path path,
4370         struct pqi_io_request *io_request)
4371 {
4372         struct pqi_io_request *next;
4373         void *next_element;
4374         pqi_index_t iq_pi;
4375         pqi_index_t iq_ci;
4376         size_t iu_length;
4377         unsigned long flags;
4378         unsigned int num_elements_needed;
4379         unsigned int num_elements_to_end_of_queue;
4380         size_t copy_count;
4381         struct pqi_iu_header *request;
4382
4383         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
4384
4385         if (io_request) {
4386                 io_request->queue_group = queue_group;
4387                 list_add_tail(&io_request->request_list_entry,
4388                         &queue_group->request_list[path]);
4389         }
4390
4391         iq_pi = queue_group->iq_pi_copy[path];
4392
4393         list_for_each_entry_safe(io_request, next,
4394                 &queue_group->request_list[path], request_list_entry) {
4395
4396                 request = io_request->iu;
4397
4398                 iu_length = get_unaligned_le16(&request->iu_length) +
4399                         PQI_REQUEST_HEADER_LENGTH;
4400                 num_elements_needed =
4401                         DIV_ROUND_UP(iu_length,
4402                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4403
4404                 iq_ci = readl(queue_group->iq_ci[path]);
4405
4406                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
4407                         ctrl_info->num_elements_per_iq))
4408                         break;
4409
4410                 put_unaligned_le16(queue_group->oq_id,
4411                         &request->response_queue_id);
4412
4413                 next_element = queue_group->iq_element_array[path] +
4414                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4415
4416                 num_elements_to_end_of_queue =
4417                         ctrl_info->num_elements_per_iq - iq_pi;
4418
4419                 if (num_elements_needed <= num_elements_to_end_of_queue) {
4420                         memcpy(next_element, request, iu_length);
4421                 } else {
4422                         copy_count = num_elements_to_end_of_queue *
4423                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4424                         memcpy(next_element, request, copy_count);
4425                         memcpy(queue_group->iq_element_array[path],
4426                                 (u8 *)request + copy_count,
4427                                 iu_length - copy_count);
4428                 }
4429
4430                 iq_pi = (iq_pi + num_elements_needed) %
4431                         ctrl_info->num_elements_per_iq;
4432
4433                 list_del(&io_request->request_list_entry);
4434         }
4435
4436         if (iq_pi != queue_group->iq_pi_copy[path]) {
4437                 queue_group->iq_pi_copy[path] = iq_pi;
4438                 /*
4439                  * This write notifies the controller that one or more IUs are
4440                  * available to be processed.
4441                  */
4442                 writel(iq_pi, queue_group->iq_pi[path]);
4443         }
4444
4445         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
4446 }
4447
4448 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
4449
4450 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
4451         struct completion *wait)
4452 {
4453         int rc;
4454
4455         while (1) {
4456                 if (wait_for_completion_io_timeout(wait,
4457                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) {
4458                         rc = 0;
4459                         break;
4460                 }
4461
4462                 pqi_check_ctrl_health(ctrl_info);
4463                 if (pqi_ctrl_offline(ctrl_info)) {
4464                         rc = -ENXIO;
4465                         break;
4466                 }
4467         }
4468
4469         return rc;
4470 }
4471
4472 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
4473         void *context)
4474 {
4475         struct completion *waiting = context;
4476
4477         complete(waiting);
4478 }
4479
4480 static int pqi_process_raid_io_error_synchronous(
4481         struct pqi_raid_error_info *error_info)
4482 {
4483         int rc = -EIO;
4484
4485         switch (error_info->data_out_result) {
4486         case PQI_DATA_IN_OUT_GOOD:
4487                 if (error_info->status == SAM_STAT_GOOD)
4488                         rc = 0;
4489                 break;
4490         case PQI_DATA_IN_OUT_UNDERFLOW:
4491                 if (error_info->status == SAM_STAT_GOOD ||
4492                         error_info->status == SAM_STAT_CHECK_CONDITION)
4493                         rc = 0;
4494                 break;
4495         case PQI_DATA_IN_OUT_ABORTED:
4496                 rc = PQI_CMD_STATUS_ABORTED;
4497                 break;
4498         }
4499
4500         return rc;
4501 }
4502
4503 static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
4504 {
4505         return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
4506 }
4507
4508 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4509         struct pqi_iu_header *request, unsigned int flags,
4510         struct pqi_raid_error_info *error_info)
4511 {
4512         int rc = 0;
4513         struct pqi_io_request *io_request;
4514         size_t iu_length;
4515         DECLARE_COMPLETION_ONSTACK(wait);
4516
4517         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4518                 if (down_interruptible(&ctrl_info->sync_request_sem))
4519                         return -ERESTARTSYS;
4520         } else {
4521                 down(&ctrl_info->sync_request_sem);
4522         }
4523
4524         pqi_ctrl_busy(ctrl_info);
4525         /*
4526          * Wait for other admin queue updates such as;
4527          * config table changes, OFA memory updates, ...
4528          */
4529         if (pqi_is_blockable_request(request))
4530                 pqi_wait_if_ctrl_blocked(ctrl_info);
4531
4532         if (pqi_ctrl_offline(ctrl_info)) {
4533                 rc = -ENXIO;
4534                 goto out;
4535         }
4536
4537         io_request = pqi_alloc_io_request(ctrl_info);
4538
4539         put_unaligned_le16(io_request->index,
4540                 &(((struct pqi_raid_path_request *)request)->request_id));
4541
4542         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4543                 ((struct pqi_raid_path_request *)request)->error_index =
4544                         ((struct pqi_raid_path_request *)request)->request_id;
4545
4546         iu_length = get_unaligned_le16(&request->iu_length) +
4547                 PQI_REQUEST_HEADER_LENGTH;
4548         memcpy(io_request->iu, request, iu_length);
4549
4550         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4551         io_request->context = &wait;
4552
4553         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4554                 io_request);
4555
4556         pqi_wait_for_completion_io(ctrl_info, &wait);
4557
4558         if (error_info) {
4559                 if (io_request->error_info)
4560                         memcpy(error_info, io_request->error_info, sizeof(*error_info));
4561                 else
4562                         memset(error_info, 0, sizeof(*error_info));
4563         } else if (rc == 0 && io_request->error_info) {
4564                 rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
4565         }
4566
4567         pqi_free_io_request(io_request);
4568
4569 out:
4570         pqi_ctrl_unbusy(ctrl_info);
4571         up(&ctrl_info->sync_request_sem);
4572
4573         return rc;
4574 }
4575
4576 static int pqi_validate_admin_response(
4577         struct pqi_general_admin_response *response, u8 expected_function_code)
4578 {
4579         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4580                 return -EINVAL;
4581
4582         if (get_unaligned_le16(&response->header.iu_length) !=
4583                 PQI_GENERAL_ADMIN_IU_LENGTH)
4584                 return -EINVAL;
4585
4586         if (response->function_code != expected_function_code)
4587                 return -EINVAL;
4588
4589         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4590                 return -EINVAL;
4591
4592         return 0;
4593 }
4594
4595 static int pqi_submit_admin_request_synchronous(
4596         struct pqi_ctrl_info *ctrl_info,
4597         struct pqi_general_admin_request *request,
4598         struct pqi_general_admin_response *response)
4599 {
4600         int rc;
4601
4602         pqi_submit_admin_request(ctrl_info, request);
4603
4604         rc = pqi_poll_for_admin_response(ctrl_info, response);
4605
4606         if (rc == 0)
4607                 rc = pqi_validate_admin_response(response, request->function_code);
4608
4609         return rc;
4610 }
4611
4612 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4613 {
4614         int rc;
4615         struct pqi_general_admin_request request;
4616         struct pqi_general_admin_response response;
4617         struct pqi_device_capability *capability;
4618         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4619
4620         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4621         if (!capability)
4622                 return -ENOMEM;
4623
4624         memset(&request, 0, sizeof(request));
4625
4626         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4627         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4628                 &request.header.iu_length);
4629         request.function_code =
4630                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4631         put_unaligned_le32(sizeof(*capability),
4632                 &request.data.report_device_capability.buffer_length);
4633
4634         rc = pqi_map_single(ctrl_info->pci_dev,
4635                 &request.data.report_device_capability.sg_descriptor,
4636                 capability, sizeof(*capability),
4637                 DMA_FROM_DEVICE);
4638         if (rc)
4639                 goto out;
4640
4641         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
4642
4643         pqi_pci_unmap(ctrl_info->pci_dev,
4644                 &request.data.report_device_capability.sg_descriptor, 1,
4645                 DMA_FROM_DEVICE);
4646
4647         if (rc)
4648                 goto out;
4649
4650         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4651                 rc = -EIO;
4652                 goto out;
4653         }
4654
4655         ctrl_info->max_inbound_queues =
4656                 get_unaligned_le16(&capability->max_inbound_queues);
4657         ctrl_info->max_elements_per_iq =
4658                 get_unaligned_le16(&capability->max_elements_per_iq);
4659         ctrl_info->max_iq_element_length =
4660                 get_unaligned_le16(&capability->max_iq_element_length)
4661                 * 16;
4662         ctrl_info->max_outbound_queues =
4663                 get_unaligned_le16(&capability->max_outbound_queues);
4664         ctrl_info->max_elements_per_oq =
4665                 get_unaligned_le16(&capability->max_elements_per_oq);
4666         ctrl_info->max_oq_element_length =
4667                 get_unaligned_le16(&capability->max_oq_element_length)
4668                 * 16;
4669
4670         sop_iu_layer_descriptor =
4671                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4672
4673         ctrl_info->max_inbound_iu_length_per_firmware =
4674                 get_unaligned_le16(
4675                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4676         ctrl_info->inbound_spanning_supported =
4677                 sop_iu_layer_descriptor->inbound_spanning_supported;
4678         ctrl_info->outbound_spanning_supported =
4679                 sop_iu_layer_descriptor->outbound_spanning_supported;
4680
4681 out:
4682         kfree(capability);
4683
4684         return rc;
4685 }
4686
4687 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4688 {
4689         if (ctrl_info->max_iq_element_length <
4690                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4691                 dev_err(&ctrl_info->pci_dev->dev,
4692                         "max. inbound queue element length of %d is less than the required length of %d\n",
4693                         ctrl_info->max_iq_element_length,
4694                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4695                 return -EINVAL;
4696         }
4697
4698         if (ctrl_info->max_oq_element_length <
4699                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4700                 dev_err(&ctrl_info->pci_dev->dev,
4701                         "max. outbound queue element length of %d is less than the required length of %d\n",
4702                         ctrl_info->max_oq_element_length,
4703                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4704                 return -EINVAL;
4705         }
4706
4707         if (ctrl_info->max_inbound_iu_length_per_firmware <
4708                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4709                 dev_err(&ctrl_info->pci_dev->dev,
4710                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4711                         ctrl_info->max_inbound_iu_length_per_firmware,
4712                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4713                 return -EINVAL;
4714         }
4715
4716         if (!ctrl_info->inbound_spanning_supported) {
4717                 dev_err(&ctrl_info->pci_dev->dev,
4718                         "the controller does not support inbound spanning\n");
4719                 return -EINVAL;
4720         }
4721
4722         if (ctrl_info->outbound_spanning_supported) {
4723                 dev_err(&ctrl_info->pci_dev->dev,
4724                         "the controller supports outbound spanning but this driver does not\n");
4725                 return -EINVAL;
4726         }
4727
4728         return 0;
4729 }
4730
4731 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4732 {
4733         int rc;
4734         struct pqi_event_queue *event_queue;
4735         struct pqi_general_admin_request request;
4736         struct pqi_general_admin_response response;
4737
4738         event_queue = &ctrl_info->event_queue;
4739
4740         /*
4741          * Create OQ (Outbound Queue - device to host queue) to dedicate
4742          * to events.
4743          */
4744         memset(&request, 0, sizeof(request));
4745         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4746         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4747                 &request.header.iu_length);
4748         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4749         put_unaligned_le16(event_queue->oq_id,
4750                 &request.data.create_operational_oq.queue_id);
4751         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4752                 &request.data.create_operational_oq.element_array_addr);
4753         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4754                 &request.data.create_operational_oq.pi_addr);
4755         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4756                 &request.data.create_operational_oq.num_elements);
4757         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4758                 &request.data.create_operational_oq.element_length);
4759         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4760         put_unaligned_le16(event_queue->int_msg_num,
4761                 &request.data.create_operational_oq.int_msg_num);
4762
4763         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4764                 &response);
4765         if (rc)
4766                 return rc;
4767
4768         event_queue->oq_ci = ctrl_info->iomem_base +
4769                 PQI_DEVICE_REGISTERS_OFFSET +
4770                 get_unaligned_le64(
4771                         &response.data.create_operational_oq.oq_ci_offset);
4772
4773         return 0;
4774 }
4775
4776 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4777         unsigned int group_number)
4778 {
4779         int rc;
4780         struct pqi_queue_group *queue_group;
4781         struct pqi_general_admin_request request;
4782         struct pqi_general_admin_response response;
4783
4784         queue_group = &ctrl_info->queue_groups[group_number];
4785
4786         /*
4787          * Create IQ (Inbound Queue - host to device queue) for
4788          * RAID path.
4789          */
4790         memset(&request, 0, sizeof(request));
4791         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4792         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4793                 &request.header.iu_length);
4794         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4795         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4796                 &request.data.create_operational_iq.queue_id);
4797         put_unaligned_le64(
4798                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4799                 &request.data.create_operational_iq.element_array_addr);
4800         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4801                 &request.data.create_operational_iq.ci_addr);
4802         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4803                 &request.data.create_operational_iq.num_elements);
4804         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4805                 &request.data.create_operational_iq.element_length);
4806         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4807
4808         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4809                 &response);
4810         if (rc) {
4811                 dev_err(&ctrl_info->pci_dev->dev,
4812                         "error creating inbound RAID queue\n");
4813                 return rc;
4814         }
4815
4816         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4817                 PQI_DEVICE_REGISTERS_OFFSET +
4818                 get_unaligned_le64(
4819                         &response.data.create_operational_iq.iq_pi_offset);
4820
4821         /*
4822          * Create IQ (Inbound Queue - host to device queue) for
4823          * Advanced I/O (AIO) path.
4824          */
4825         memset(&request, 0, sizeof(request));
4826         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4827         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4828                 &request.header.iu_length);
4829         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4830         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4831                 &request.data.create_operational_iq.queue_id);
4832         put_unaligned_le64((u64)queue_group->
4833                 iq_element_array_bus_addr[AIO_PATH],
4834                 &request.data.create_operational_iq.element_array_addr);
4835         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4836                 &request.data.create_operational_iq.ci_addr);
4837         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4838                 &request.data.create_operational_iq.num_elements);
4839         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4840                 &request.data.create_operational_iq.element_length);
4841         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4842
4843         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4844                 &response);
4845         if (rc) {
4846                 dev_err(&ctrl_info->pci_dev->dev,
4847                         "error creating inbound AIO queue\n");
4848                 return rc;
4849         }
4850
4851         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4852                 PQI_DEVICE_REGISTERS_OFFSET +
4853                 get_unaligned_le64(
4854                         &response.data.create_operational_iq.iq_pi_offset);
4855
4856         /*
4857          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4858          * assumed to be for RAID path I/O unless we change the queue's
4859          * property.
4860          */
4861         memset(&request, 0, sizeof(request));
4862         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4863         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4864                 &request.header.iu_length);
4865         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4866         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4867                 &request.data.change_operational_iq_properties.queue_id);
4868         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4869                 &request.data.change_operational_iq_properties.vendor_specific);
4870
4871         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4872                 &response);
4873         if (rc) {
4874                 dev_err(&ctrl_info->pci_dev->dev,
4875                         "error changing queue property\n");
4876                 return rc;
4877         }
4878
4879         /*
4880          * Create OQ (Outbound Queue - device to host queue).
4881          */
4882         memset(&request, 0, sizeof(request));
4883         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4884         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4885                 &request.header.iu_length);
4886         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4887         put_unaligned_le16(queue_group->oq_id,
4888                 &request.data.create_operational_oq.queue_id);
4889         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4890                 &request.data.create_operational_oq.element_array_addr);
4891         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4892                 &request.data.create_operational_oq.pi_addr);
4893         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4894                 &request.data.create_operational_oq.num_elements);
4895         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4896                 &request.data.create_operational_oq.element_length);
4897         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4898         put_unaligned_le16(queue_group->int_msg_num,
4899                 &request.data.create_operational_oq.int_msg_num);
4900
4901         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4902                 &response);
4903         if (rc) {
4904                 dev_err(&ctrl_info->pci_dev->dev,
4905                         "error creating outbound queue\n");
4906                 return rc;
4907         }
4908
4909         queue_group->oq_ci = ctrl_info->iomem_base +
4910                 PQI_DEVICE_REGISTERS_OFFSET +
4911                 get_unaligned_le64(
4912                         &response.data.create_operational_oq.oq_ci_offset);
4913
4914         return 0;
4915 }
4916
4917 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4918 {
4919         int rc;
4920         unsigned int i;
4921
4922         rc = pqi_create_event_queue(ctrl_info);
4923         if (rc) {
4924                 dev_err(&ctrl_info->pci_dev->dev,
4925                         "error creating event queue\n");
4926                 return rc;
4927         }
4928
4929         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4930                 rc = pqi_create_queue_group(ctrl_info, i);
4931                 if (rc) {
4932                         dev_err(&ctrl_info->pci_dev->dev,
4933                                 "error creating queue group number %u/%u\n",
4934                                 i, ctrl_info->num_queue_groups);
4935                         return rc;
4936                 }
4937         }
4938
4939         return 0;
4940 }
4941
4942 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4943         struct_size((struct pqi_event_config *)0, descriptors, PQI_MAX_EVENT_DESCRIPTORS)
4944
4945 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4946         bool enable_events)
4947 {
4948         int rc;
4949         unsigned int i;
4950         struct pqi_event_config *event_config;
4951         struct pqi_event_descriptor *event_descriptor;
4952         struct pqi_general_management_request request;
4953
4954         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4955                 GFP_KERNEL);
4956         if (!event_config)
4957                 return -ENOMEM;
4958
4959         memset(&request, 0, sizeof(request));
4960
4961         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4962         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4963                 data.report_event_configuration.sg_descriptors[1]) -
4964                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4965         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4966                 &request.data.report_event_configuration.buffer_length);
4967
4968         rc = pqi_map_single(ctrl_info->pci_dev,
4969                 request.data.report_event_configuration.sg_descriptors,
4970                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4971                 DMA_FROM_DEVICE);
4972         if (rc)
4973                 goto out;
4974
4975         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
4976
4977         pqi_pci_unmap(ctrl_info->pci_dev,
4978                 request.data.report_event_configuration.sg_descriptors, 1,
4979                 DMA_FROM_DEVICE);
4980
4981         if (rc)
4982                 goto out;
4983
4984         for (i = 0; i < event_config->num_event_descriptors; i++) {
4985                 event_descriptor = &event_config->descriptors[i];
4986                 if (enable_events &&
4987                         pqi_is_supported_event(event_descriptor->event_type))
4988                                 put_unaligned_le16(ctrl_info->event_queue.oq_id,
4989                                         &event_descriptor->oq_id);
4990                 else
4991                         put_unaligned_le16(0, &event_descriptor->oq_id);
4992         }
4993
4994         memset(&request, 0, sizeof(request));
4995
4996         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4997         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4998                 data.report_event_configuration.sg_descriptors[1]) -
4999                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
5000         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5001                 &request.data.report_event_configuration.buffer_length);
5002
5003         rc = pqi_map_single(ctrl_info->pci_dev,
5004                 request.data.report_event_configuration.sg_descriptors,
5005                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
5006                 DMA_TO_DEVICE);
5007         if (rc)
5008                 goto out;
5009
5010         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
5011
5012         pqi_pci_unmap(ctrl_info->pci_dev,
5013                 request.data.report_event_configuration.sg_descriptors, 1,
5014                 DMA_TO_DEVICE);
5015
5016 out:
5017         kfree(event_config);
5018
5019         return rc;
5020 }
5021
5022 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
5023 {
5024         return pqi_configure_events(ctrl_info, true);
5025 }
5026
5027 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
5028 {
5029         unsigned int i;
5030         struct device *dev;
5031         size_t sg_chain_buffer_length;
5032         struct pqi_io_request *io_request;
5033
5034         if (!ctrl_info->io_request_pool)
5035                 return;
5036
5037         dev = &ctrl_info->pci_dev->dev;
5038         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5039         io_request = ctrl_info->io_request_pool;
5040
5041         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5042                 kfree(io_request->iu);
5043                 if (!io_request->sg_chain_buffer)
5044                         break;
5045                 dma_free_coherent(dev, sg_chain_buffer_length,
5046                         io_request->sg_chain_buffer,
5047                         io_request->sg_chain_buffer_dma_handle);
5048                 io_request++;
5049         }
5050
5051         kfree(ctrl_info->io_request_pool);
5052         ctrl_info->io_request_pool = NULL;
5053 }
5054
5055 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
5056 {
5057         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
5058                                      ctrl_info->error_buffer_length,
5059                                      &ctrl_info->error_buffer_dma_handle,
5060                                      GFP_KERNEL);
5061         if (!ctrl_info->error_buffer)
5062                 return -ENOMEM;
5063
5064         return 0;
5065 }
5066
5067 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
5068 {
5069         unsigned int i;
5070         void *sg_chain_buffer;
5071         size_t sg_chain_buffer_length;
5072         dma_addr_t sg_chain_buffer_dma_handle;
5073         struct device *dev;
5074         struct pqi_io_request *io_request;
5075
5076         ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
5077                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
5078
5079         if (!ctrl_info->io_request_pool) {
5080                 dev_err(&ctrl_info->pci_dev->dev,
5081                         "failed to allocate I/O request pool\n");
5082                 goto error;
5083         }
5084
5085         dev = &ctrl_info->pci_dev->dev;
5086         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
5087         io_request = ctrl_info->io_request_pool;
5088
5089         for (i = 0; i < ctrl_info->max_io_slots; i++) {
5090                 io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
5091
5092                 if (!io_request->iu) {
5093                         dev_err(&ctrl_info->pci_dev->dev,
5094                                 "failed to allocate IU buffers\n");
5095                         goto error;
5096                 }
5097
5098                 sg_chain_buffer = dma_alloc_coherent(dev,
5099                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
5100                         GFP_KERNEL);
5101
5102                 if (!sg_chain_buffer) {
5103                         dev_err(&ctrl_info->pci_dev->dev,
5104                                 "failed to allocate PQI scatter-gather chain buffers\n");
5105                         goto error;
5106                 }
5107
5108                 io_request->index = i;
5109                 io_request->sg_chain_buffer = sg_chain_buffer;
5110                 io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
5111                 io_request++;
5112         }
5113
5114         return 0;
5115
5116 error:
5117         pqi_free_all_io_requests(ctrl_info);
5118
5119         return -ENOMEM;
5120 }
5121
5122 /*
5123  * Calculate required resources that are sized based on max. outstanding
5124  * requests and max. transfer size.
5125  */
5126
5127 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
5128 {
5129         u32 max_transfer_size;
5130         u32 max_sg_entries;
5131
5132         ctrl_info->scsi_ml_can_queue =
5133                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
5134         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
5135
5136         ctrl_info->error_buffer_length =
5137                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
5138
5139         if (reset_devices)
5140                 max_transfer_size = min(ctrl_info->max_transfer_size,
5141                         PQI_MAX_TRANSFER_SIZE_KDUMP);
5142         else
5143                 max_transfer_size = min(ctrl_info->max_transfer_size,
5144                         PQI_MAX_TRANSFER_SIZE);
5145
5146         max_sg_entries = max_transfer_size / PAGE_SIZE;
5147
5148         /* +1 to cover when the buffer is not page-aligned. */
5149         max_sg_entries++;
5150
5151         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
5152
5153         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
5154
5155         ctrl_info->sg_chain_buffer_length =
5156                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
5157                 PQI_EXTRA_SGL_MEMORY;
5158         ctrl_info->sg_tablesize = max_sg_entries;
5159         ctrl_info->max_sectors = max_transfer_size / 512;
5160 }
5161
5162 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
5163 {
5164         int num_queue_groups;
5165         u16 num_elements_per_iq;
5166         u16 num_elements_per_oq;
5167
5168         if (reset_devices) {
5169                 num_queue_groups = 1;
5170         } else {
5171                 int num_cpus;
5172                 int max_queue_groups;
5173
5174                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
5175                         ctrl_info->max_outbound_queues - 1);
5176                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
5177
5178                 num_cpus = num_online_cpus();
5179                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
5180                 num_queue_groups = min(num_queue_groups, max_queue_groups);
5181         }
5182
5183         ctrl_info->num_queue_groups = num_queue_groups;
5184         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
5185
5186         /*
5187          * Make sure that the max. inbound IU length is an even multiple
5188          * of our inbound element length.
5189          */
5190         ctrl_info->max_inbound_iu_length =
5191                 (ctrl_info->max_inbound_iu_length_per_firmware /
5192                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
5193                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
5194
5195         num_elements_per_iq =
5196                 (ctrl_info->max_inbound_iu_length /
5197                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
5198
5199         /* Add one because one element in each queue is unusable. */
5200         num_elements_per_iq++;
5201
5202         num_elements_per_iq = min(num_elements_per_iq,
5203                 ctrl_info->max_elements_per_iq);
5204
5205         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
5206         num_elements_per_oq = min(num_elements_per_oq,
5207                 ctrl_info->max_elements_per_oq);
5208
5209         ctrl_info->num_elements_per_iq = num_elements_per_iq;
5210         ctrl_info->num_elements_per_oq = num_elements_per_oq;
5211
5212         ctrl_info->max_sg_per_iu =
5213                 ((ctrl_info->max_inbound_iu_length -
5214                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5215                 sizeof(struct pqi_sg_descriptor)) +
5216                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
5217
5218         ctrl_info->max_sg_per_r56_iu =
5219                 ((ctrl_info->max_inbound_iu_length -
5220                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
5221                 sizeof(struct pqi_sg_descriptor)) +
5222                 PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
5223 }
5224
5225 static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
5226         struct scatterlist *sg)
5227 {
5228         u64 address = (u64)sg_dma_address(sg);
5229         unsigned int length = sg_dma_len(sg);
5230
5231         put_unaligned_le64(address, &sg_descriptor->address);
5232         put_unaligned_le32(length, &sg_descriptor->length);
5233         put_unaligned_le32(0, &sg_descriptor->flags);
5234 }
5235
5236 static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
5237         struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
5238         int max_sg_per_iu, bool *chained)
5239 {
5240         int i;
5241         unsigned int num_sg_in_iu;
5242
5243         *chained = false;
5244         i = 0;
5245         num_sg_in_iu = 0;
5246         max_sg_per_iu--;        /* Subtract 1 to leave room for chain marker. */
5247
5248         while (1) {
5249                 pqi_set_sg_descriptor(sg_descriptor, sg);
5250                 if (!*chained)
5251                         num_sg_in_iu++;
5252                 i++;
5253                 if (i == sg_count)
5254                         break;
5255                 sg_descriptor++;
5256                 if (i == max_sg_per_iu) {
5257                         put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
5258                                 &sg_descriptor->address);
5259                         put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
5260                                 &sg_descriptor->length);
5261                         put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
5262                         *chained = true;
5263                         num_sg_in_iu++;
5264                         sg_descriptor = io_request->sg_chain_buffer;
5265                 }
5266                 sg = sg_next(sg);
5267         }
5268
5269         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
5270
5271         return num_sg_in_iu;
5272 }
5273
5274 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
5275         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
5276         struct pqi_io_request *io_request)
5277 {
5278         u16 iu_length;
5279         int sg_count;
5280         bool chained;
5281         unsigned int num_sg_in_iu;
5282         struct scatterlist *sg;
5283         struct pqi_sg_descriptor *sg_descriptor;
5284
5285         sg_count = scsi_dma_map(scmd);
5286         if (sg_count < 0)
5287                 return sg_count;
5288
5289         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5290                 PQI_REQUEST_HEADER_LENGTH;
5291
5292         if (sg_count == 0)
5293                 goto out;
5294
5295         sg = scsi_sglist(scmd);
5296         sg_descriptor = request->sg_descriptors;
5297
5298         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5299                 ctrl_info->max_sg_per_iu, &chained);
5300
5301         request->partial = chained;
5302         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5303
5304 out:
5305         put_unaligned_le16(iu_length, &request->header.iu_length);
5306
5307         return 0;
5308 }
5309
5310 static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
5311         struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
5312         struct pqi_io_request *io_request)
5313 {
5314         u16 iu_length;
5315         int sg_count;
5316         bool chained;
5317         unsigned int num_sg_in_iu;
5318         struct scatterlist *sg;
5319         struct pqi_sg_descriptor *sg_descriptor;
5320
5321         sg_count = scsi_dma_map(scmd);
5322         if (sg_count < 0)
5323                 return sg_count;
5324
5325         iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
5326                 PQI_REQUEST_HEADER_LENGTH;
5327         num_sg_in_iu = 0;
5328
5329         if (sg_count == 0)
5330                 goto out;
5331
5332         sg = scsi_sglist(scmd);
5333         sg_descriptor = request->sg_descriptors;
5334
5335         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5336                 ctrl_info->max_sg_per_iu, &chained);
5337
5338         request->partial = chained;
5339         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5340
5341 out:
5342         put_unaligned_le16(iu_length, &request->header.iu_length);
5343         request->num_sg_descriptors = num_sg_in_iu;
5344
5345         return 0;
5346 }
5347
5348 static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
5349         struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
5350         struct pqi_io_request *io_request)
5351 {
5352         u16 iu_length;
5353         int sg_count;
5354         bool chained;
5355         unsigned int num_sg_in_iu;
5356         struct scatterlist *sg;
5357         struct pqi_sg_descriptor *sg_descriptor;
5358
5359         sg_count = scsi_dma_map(scmd);
5360         if (sg_count < 0)
5361                 return sg_count;
5362
5363         iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
5364                 PQI_REQUEST_HEADER_LENGTH;
5365         num_sg_in_iu = 0;
5366
5367         if (sg_count != 0) {
5368                 sg = scsi_sglist(scmd);
5369                 sg_descriptor = request->sg_descriptors;
5370
5371                 num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5372                         ctrl_info->max_sg_per_r56_iu, &chained);
5373
5374                 request->partial = chained;
5375                 iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5376         }
5377
5378         put_unaligned_le16(iu_length, &request->header.iu_length);
5379         request->num_sg_descriptors = num_sg_in_iu;
5380
5381         return 0;
5382 }
5383
5384 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
5385         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
5386         struct pqi_io_request *io_request)
5387 {
5388         u16 iu_length;
5389         int sg_count;
5390         bool chained;
5391         unsigned int num_sg_in_iu;
5392         struct scatterlist *sg;
5393         struct pqi_sg_descriptor *sg_descriptor;
5394
5395         sg_count = scsi_dma_map(scmd);
5396         if (sg_count < 0)
5397                 return sg_count;
5398
5399         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
5400                 PQI_REQUEST_HEADER_LENGTH;
5401         num_sg_in_iu = 0;
5402
5403         if (sg_count == 0)
5404                 goto out;
5405
5406         sg = scsi_sglist(scmd);
5407         sg_descriptor = request->sg_descriptors;
5408
5409         num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
5410                 ctrl_info->max_sg_per_iu, &chained);
5411
5412         request->partial = chained;
5413         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
5414
5415 out:
5416         put_unaligned_le16(iu_length, &request->header.iu_length);
5417         request->num_sg_descriptors = num_sg_in_iu;
5418
5419         return 0;
5420 }
5421
5422 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
5423         void *context)
5424 {
5425         struct scsi_cmnd *scmd;
5426
5427         scmd = io_request->scmd;
5428         pqi_free_io_request(io_request);
5429         scsi_dma_unmap(scmd);
5430         pqi_scsi_done(scmd);
5431 }
5432
5433 static int pqi_raid_submit_scsi_cmd_with_io_request(
5434         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
5435         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5436         struct pqi_queue_group *queue_group)
5437 {
5438         int rc;
5439         size_t cdb_length;
5440         struct pqi_raid_path_request *request;
5441
5442         io_request->io_complete_callback = pqi_raid_io_complete;
5443         io_request->scmd = scmd;
5444
5445         request = io_request->iu;
5446         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5447
5448         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5449         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5450         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5451         put_unaligned_le16(io_request->index, &request->request_id);
5452         request->error_index = request->request_id;
5453         memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
5454
5455         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
5456         memcpy(request->cdb, scmd->cmnd, cdb_length);
5457
5458         switch (cdb_length) {
5459         case 6:
5460         case 10:
5461         case 12:
5462         case 16:
5463                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5464                 break;
5465         case 20:
5466                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
5467                 break;
5468         case 24:
5469                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
5470                 break;
5471         case 28:
5472                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
5473                 break;
5474         case 32:
5475         default:
5476                 request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
5477                 break;
5478         }
5479
5480         switch (scmd->sc_data_direction) {
5481         case DMA_TO_DEVICE:
5482                 request->data_direction = SOP_READ_FLAG;
5483                 break;
5484         case DMA_FROM_DEVICE:
5485                 request->data_direction = SOP_WRITE_FLAG;
5486                 break;
5487         case DMA_NONE:
5488                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5489                 break;
5490         case DMA_BIDIRECTIONAL:
5491                 request->data_direction = SOP_BIDIRECTIONAL;
5492                 break;
5493         default:
5494                 dev_err(&ctrl_info->pci_dev->dev,
5495                         "unknown data direction: %d\n",
5496                         scmd->sc_data_direction);
5497                 break;
5498         }
5499
5500         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5501         if (rc) {
5502                 pqi_free_io_request(io_request);
5503                 return SCSI_MLQUEUE_HOST_BUSY;
5504         }
5505
5506         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5507
5508         return 0;
5509 }
5510
5511 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5512         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5513         struct pqi_queue_group *queue_group)
5514 {
5515         struct pqi_io_request *io_request;
5516
5517         io_request = pqi_alloc_io_request(ctrl_info);
5518
5519         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5520                 device, scmd, queue_group);
5521 }
5522
5523 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5524 {
5525         struct scsi_cmnd *scmd;
5526         struct pqi_scsi_dev *device;
5527         struct pqi_ctrl_info *ctrl_info;
5528
5529         if (!io_request->raid_bypass)
5530                 return false;
5531
5532         scmd = io_request->scmd;
5533         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5534                 return false;
5535         if (host_byte(scmd->result) == DID_NO_CONNECT)
5536                 return false;
5537
5538         device = scmd->device->hostdata;
5539         if (pqi_device_offline(device) || pqi_device_in_remove(device))
5540                 return false;
5541
5542         ctrl_info = shost_to_hba(scmd->device->host);
5543         if (pqi_ctrl_offline(ctrl_info))
5544                 return false;
5545
5546         return true;
5547 }
5548
5549 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5550         void *context)
5551 {
5552         struct scsi_cmnd *scmd;
5553
5554         scmd = io_request->scmd;
5555         scsi_dma_unmap(scmd);
5556         if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
5557                 set_host_byte(scmd, DID_IMM_RETRY);
5558                 scmd->SCp.this_residual++;
5559         }
5560
5561         pqi_free_io_request(io_request);
5562         pqi_scsi_done(scmd);
5563 }
5564
5565 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5566         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5567         struct pqi_queue_group *queue_group)
5568 {
5569         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5570                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
5571 }
5572
5573 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5574         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5575         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5576         struct pqi_encryption_info *encryption_info, bool raid_bypass)
5577 {
5578         int rc;
5579         struct pqi_io_request *io_request;
5580         struct pqi_aio_path_request *request;
5581
5582         io_request = pqi_alloc_io_request(ctrl_info);
5583         io_request->io_complete_callback = pqi_aio_io_complete;
5584         io_request->scmd = scmd;
5585         io_request->raid_bypass = raid_bypass;
5586
5587         request = io_request->iu;
5588         memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
5589
5590         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5591         put_unaligned_le32(aio_handle, &request->nexus_id);
5592         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5593         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5594         put_unaligned_le16(io_request->index, &request->request_id);
5595         request->error_index = request->request_id;
5596         if (cdb_length > sizeof(request->cdb))
5597                 cdb_length = sizeof(request->cdb);
5598         request->cdb_length = cdb_length;
5599         memcpy(request->cdb, cdb, cdb_length);
5600
5601         switch (scmd->sc_data_direction) {
5602         case DMA_TO_DEVICE:
5603                 request->data_direction = SOP_READ_FLAG;
5604                 break;
5605         case DMA_FROM_DEVICE:
5606                 request->data_direction = SOP_WRITE_FLAG;
5607                 break;
5608         case DMA_NONE:
5609                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5610                 break;
5611         case DMA_BIDIRECTIONAL:
5612                 request->data_direction = SOP_BIDIRECTIONAL;
5613                 break;
5614         default:
5615                 dev_err(&ctrl_info->pci_dev->dev,
5616                         "unknown data direction: %d\n",
5617                         scmd->sc_data_direction);
5618                 break;
5619         }
5620
5621         if (encryption_info) {
5622                 request->encryption_enable = true;
5623                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5624                         &request->data_encryption_key_index);
5625                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5626                         &request->encrypt_tweak_lower);
5627                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5628                         &request->encrypt_tweak_upper);
5629         }
5630
5631         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5632         if (rc) {
5633                 pqi_free_io_request(io_request);
5634                 return SCSI_MLQUEUE_HOST_BUSY;
5635         }
5636
5637         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5638
5639         return 0;
5640 }
5641
5642 static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
5643         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5644         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5645         struct pqi_scsi_dev_raid_map_data *rmd)
5646 {
5647         int rc;
5648         struct pqi_io_request *io_request;
5649         struct pqi_aio_r1_path_request *r1_request;
5650
5651         io_request = pqi_alloc_io_request(ctrl_info);
5652         io_request->io_complete_callback = pqi_aio_io_complete;
5653         io_request->scmd = scmd;
5654         io_request->raid_bypass = true;
5655
5656         r1_request = io_request->iu;
5657         memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
5658
5659         r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
5660         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
5661         r1_request->num_drives = rmd->num_it_nexus_entries;
5662         put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
5663         put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
5664         if (rmd->num_it_nexus_entries == 3)
5665                 put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
5666
5667         put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
5668         r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5669         put_unaligned_le16(io_request->index, &r1_request->request_id);
5670         r1_request->error_index = r1_request->request_id;
5671         if (rmd->cdb_length > sizeof(r1_request->cdb))
5672                 rmd->cdb_length = sizeof(r1_request->cdb);
5673         r1_request->cdb_length = rmd->cdb_length;
5674         memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
5675
5676         /* The direction is always write. */
5677         r1_request->data_direction = SOP_READ_FLAG;
5678
5679         if (encryption_info) {
5680                 r1_request->encryption_enable = true;
5681                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5682                                 &r1_request->data_encryption_key_index);
5683                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5684                                 &r1_request->encrypt_tweak_lower);
5685                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5686                                 &r1_request->encrypt_tweak_upper);
5687         }
5688
5689         rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
5690         if (rc) {
5691                 pqi_free_io_request(io_request);
5692                 return SCSI_MLQUEUE_HOST_BUSY;
5693         }
5694
5695         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5696
5697         return 0;
5698 }
5699
5700 static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
5701         struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
5702         struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
5703         struct pqi_scsi_dev_raid_map_data *rmd)
5704 {
5705         int rc;
5706         struct pqi_io_request *io_request;
5707         struct pqi_aio_r56_path_request *r56_request;
5708
5709         io_request = pqi_alloc_io_request(ctrl_info);
5710         io_request->io_complete_callback = pqi_aio_io_complete;
5711         io_request->scmd = scmd;
5712         io_request->raid_bypass = true;
5713
5714         r56_request = io_request->iu;
5715         memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
5716
5717         if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
5718                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
5719         else
5720                 r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
5721
5722         put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
5723         put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
5724         put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
5725         if (rmd->raid_level == SA_RAID_6) {
5726                 put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
5727                 r56_request->xor_multiplier = rmd->xor_mult;
5728         }
5729         put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
5730         r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5731         put_unaligned_le64(rmd->row, &r56_request->row);
5732
5733         put_unaligned_le16(io_request->index, &r56_request->request_id);
5734         r56_request->error_index = r56_request->request_id;
5735
5736         if (rmd->cdb_length > sizeof(r56_request->cdb))
5737                 rmd->cdb_length = sizeof(r56_request->cdb);
5738         r56_request->cdb_length = rmd->cdb_length;
5739         memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
5740
5741         /* The direction is always write. */
5742         r56_request->data_direction = SOP_READ_FLAG;
5743
5744         if (encryption_info) {
5745                 r56_request->encryption_enable = true;
5746                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5747                                 &r56_request->data_encryption_key_index);
5748                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5749                                 &r56_request->encrypt_tweak_lower);
5750                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5751                                 &r56_request->encrypt_tweak_upper);
5752         }
5753
5754         rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
5755         if (rc) {
5756                 pqi_free_io_request(io_request);
5757                 return SCSI_MLQUEUE_HOST_BUSY;
5758         }
5759
5760         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5761
5762         return 0;
5763 }
5764
5765 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5766         struct scsi_cmnd *scmd)
5767 {
5768         u16 hw_queue;
5769
5770         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
5771         if (hw_queue > ctrl_info->max_hw_queue_index)
5772                 hw_queue = 0;
5773
5774         return hw_queue;
5775 }
5776
5777 static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
5778 {
5779         if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
5780                 return false;
5781
5782         return scmd->SCp.this_residual == 0;
5783 }
5784
5785 /*
5786  * This function gets called just before we hand the completed SCSI request
5787  * back to the SML.
5788  */
5789
5790 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5791 {
5792         struct pqi_scsi_dev *device;
5793
5794         if (!scmd->device) {
5795                 set_host_byte(scmd, DID_NO_CONNECT);
5796                 return;
5797         }
5798
5799         device = scmd->device->hostdata;
5800         if (!device) {
5801                 set_host_byte(scmd, DID_NO_CONNECT);
5802                 return;
5803         }
5804
5805         atomic_dec(&device->scsi_cmds_outstanding);
5806 }
5807
5808 static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
5809         struct scsi_cmnd *scmd)
5810 {
5811         u32 oldest_jiffies;
5812         u8 lru_index;
5813         int i;
5814         int rc;
5815         struct pqi_scsi_dev *device;
5816         struct pqi_stream_data *pqi_stream_data;
5817         struct pqi_scsi_dev_raid_map_data rmd;
5818
5819         if (!ctrl_info->enable_stream_detection)
5820                 return false;
5821
5822         rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
5823         if (rc)
5824                 return false;
5825
5826         /* Check writes only. */
5827         if (!rmd.is_write)
5828                 return false;
5829
5830         device = scmd->device->hostdata;
5831
5832         /* Check for RAID 5/6 streams. */
5833         if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
5834                 return false;
5835
5836         /*
5837          * If controller does not support AIO RAID{5,6} writes, need to send
5838          * requests down non-AIO path.
5839          */
5840         if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
5841                 (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
5842                 return true;
5843
5844         lru_index = 0;
5845         oldest_jiffies = INT_MAX;
5846         for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
5847                 pqi_stream_data = &device->stream_data[i];
5848                 /*
5849                  * Check for adjacent request or request is within
5850                  * the previous request.
5851                  */
5852                 if ((pqi_stream_data->next_lba &&
5853                         rmd.first_block >= pqi_stream_data->next_lba) &&
5854                         rmd.first_block <= pqi_stream_data->next_lba +
5855                                 rmd.block_cnt) {
5856                         pqi_stream_data->next_lba = rmd.first_block +
5857                                 rmd.block_cnt;
5858                         pqi_stream_data->last_accessed = jiffies;
5859                         return true;
5860                 }
5861
5862                 /* unused entry */
5863                 if (pqi_stream_data->last_accessed == 0) {
5864                         lru_index = i;
5865                         break;
5866                 }
5867
5868                 /* Find entry with oldest last accessed time. */
5869                 if (pqi_stream_data->last_accessed <= oldest_jiffies) {
5870                         oldest_jiffies = pqi_stream_data->last_accessed;
5871                         lru_index = i;
5872                 }
5873         }
5874
5875         /* Set LRU entry. */
5876         pqi_stream_data = &device->stream_data[lru_index];
5877         pqi_stream_data->last_accessed = jiffies;
5878         pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
5879
5880         return false;
5881 }
5882
5883 static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
5884 {
5885         int rc;
5886         struct pqi_ctrl_info *ctrl_info;
5887         struct pqi_scsi_dev *device;
5888         u16 hw_queue;
5889         struct pqi_queue_group *queue_group;
5890         bool raid_bypassed;
5891
5892         device = scmd->device->hostdata;
5893
5894         if (!device) {
5895                 set_host_byte(scmd, DID_NO_CONNECT);
5896                 pqi_scsi_done(scmd);
5897                 return 0;
5898         }
5899
5900         atomic_inc(&device->scsi_cmds_outstanding);
5901
5902         ctrl_info = shost_to_hba(shost);
5903
5904         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
5905                 set_host_byte(scmd, DID_NO_CONNECT);
5906                 pqi_scsi_done(scmd);
5907                 return 0;
5908         }
5909
5910         if (pqi_ctrl_blocked(ctrl_info)) {
5911                 rc = SCSI_MLQUEUE_HOST_BUSY;
5912                 goto out;
5913         }
5914
5915         /*
5916          * This is necessary because the SML doesn't zero out this field during
5917          * error recovery.
5918          */
5919         scmd->result = 0;
5920
5921         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5922         queue_group = &ctrl_info->queue_groups[hw_queue];
5923
5924         if (pqi_is_logical_device(device)) {
5925                 raid_bypassed = false;
5926                 if (device->raid_bypass_enabled &&
5927                         pqi_is_bypass_eligible_request(scmd) &&
5928                         !pqi_is_parity_write_stream(ctrl_info, scmd)) {
5929                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5930                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
5931                                 raid_bypassed = true;
5932                                 atomic_inc(&device->raid_bypass_cnt);
5933                         }
5934                 }
5935                 if (!raid_bypassed)
5936                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5937         } else {
5938                 if (device->aio_enabled)
5939                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5940                 else
5941                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5942         }
5943
5944 out:
5945         if (rc)
5946                 atomic_dec(&device->scsi_cmds_outstanding);
5947
5948         return rc;
5949 }
5950
5951 static unsigned int pqi_queued_io_count(struct pqi_ctrl_info *ctrl_info)
5952 {
5953         unsigned int i;
5954         unsigned int path;
5955         unsigned long flags;
5956         unsigned int queued_io_count;
5957         struct pqi_queue_group *queue_group;
5958         struct pqi_io_request *io_request;
5959
5960         queued_io_count = 0;
5961
5962         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5963                 queue_group = &ctrl_info->queue_groups[i];
5964                 for (path = 0; path < 2; path++) {
5965                         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
5966                         list_for_each_entry(io_request, &queue_group->request_list[path], request_list_entry)
5967                                 queued_io_count++;
5968                         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
5969                 }
5970         }
5971
5972         return queued_io_count;
5973 }
5974
5975 static unsigned int pqi_nonempty_inbound_queue_count(struct pqi_ctrl_info *ctrl_info)
5976 {
5977         unsigned int i;
5978         unsigned int path;
5979         unsigned int nonempty_inbound_queue_count;
5980         struct pqi_queue_group *queue_group;
5981         pqi_index_t iq_pi;
5982         pqi_index_t iq_ci;
5983
5984         nonempty_inbound_queue_count = 0;
5985
5986         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5987                 queue_group = &ctrl_info->queue_groups[i];
5988                 for (path = 0; path < 2; path++) {
5989                         iq_pi = queue_group->iq_pi_copy[path];
5990                         iq_ci = readl(queue_group->iq_ci[path]);
5991                         if (iq_ci != iq_pi)
5992                                 nonempty_inbound_queue_count++;
5993                 }
5994         }
5995
5996         return nonempty_inbound_queue_count;
5997 }
5998
5999 #define PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS        10
6000
6001 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
6002 {
6003         unsigned long start_jiffies;
6004         unsigned long warning_timeout;
6005         unsigned int queued_io_count;
6006         unsigned int nonempty_inbound_queue_count;
6007         bool displayed_warning;
6008
6009         displayed_warning = false;
6010         start_jiffies = jiffies;
6011         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
6012
6013         while (1) {
6014                 queued_io_count = pqi_queued_io_count(ctrl_info);
6015                 nonempty_inbound_queue_count = pqi_nonempty_inbound_queue_count(ctrl_info);
6016                 if (queued_io_count == 0 && nonempty_inbound_queue_count == 0)
6017                         break;
6018                 pqi_check_ctrl_health(ctrl_info);
6019                 if (pqi_ctrl_offline(ctrl_info))
6020                         return -ENXIO;
6021                 if (time_after(jiffies, warning_timeout)) {
6022                         dev_warn(&ctrl_info->pci_dev->dev,
6023                                 "waiting %u seconds for queued I/O to drain (queued I/O count: %u; non-empty inbound queue count: %u)\n",
6024                                 jiffies_to_msecs(jiffies - start_jiffies) / 1000, queued_io_count, nonempty_inbound_queue_count);
6025                         displayed_warning = true;
6026                         warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
6027                 }
6028                 usleep_range(1000, 2000);
6029         }
6030
6031         if (displayed_warning)
6032                 dev_warn(&ctrl_info->pci_dev->dev,
6033                         "queued I/O drained after waiting for %u seconds\n",
6034                         jiffies_to_msecs(jiffies - start_jiffies) / 1000);
6035
6036         return 0;
6037 }
6038
6039 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
6040         struct pqi_scsi_dev *device)
6041 {
6042         unsigned int i;
6043         unsigned int path;
6044         struct pqi_queue_group *queue_group;
6045         unsigned long flags;
6046         struct pqi_io_request *io_request;
6047         struct pqi_io_request *next;
6048         struct scsi_cmnd *scmd;
6049         struct pqi_scsi_dev *scsi_device;
6050
6051         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6052                 queue_group = &ctrl_info->queue_groups[i];
6053
6054                 for (path = 0; path < 2; path++) {
6055                         spin_lock_irqsave(
6056                                 &queue_group->submit_lock[path], flags);
6057
6058                         list_for_each_entry_safe(io_request, next,
6059                                 &queue_group->request_list[path],
6060                                 request_list_entry) {
6061
6062                                 scmd = io_request->scmd;
6063                                 if (!scmd)
6064                                         continue;
6065
6066                                 scsi_device = scmd->device->hostdata;
6067                                 if (scsi_device != device)
6068                                         continue;
6069
6070                                 list_del(&io_request->request_list_entry);
6071                                 set_host_byte(scmd, DID_RESET);
6072                                 pqi_free_io_request(io_request);
6073                                 scsi_dma_unmap(scmd);
6074                                 pqi_scsi_done(scmd);
6075                         }
6076
6077                         spin_unlock_irqrestore(
6078                                 &queue_group->submit_lock[path], flags);
6079                 }
6080         }
6081 }
6082
6083 #define PQI_PENDING_IO_WARNING_TIMEOUT_SECS     10
6084
6085 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
6086         struct pqi_scsi_dev *device, unsigned long timeout_msecs)
6087 {
6088         int cmds_outstanding;
6089         unsigned long start_jiffies;
6090         unsigned long warning_timeout;
6091         unsigned long msecs_waiting;
6092
6093         start_jiffies = jiffies;
6094         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * PQI_HZ) + start_jiffies;
6095
6096         while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding)) > 0) {
6097                 pqi_check_ctrl_health(ctrl_info);
6098                 if (pqi_ctrl_offline(ctrl_info))
6099                         return -ENXIO;
6100                 msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
6101                 if (msecs_waiting >= timeout_msecs) {
6102                         dev_err(&ctrl_info->pci_dev->dev,
6103                                 "scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
6104                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6105                                 device->lun, msecs_waiting / 1000, cmds_outstanding);
6106                         return -ETIMEDOUT;
6107                 }
6108                 if (time_after(jiffies, warning_timeout)) {
6109                         dev_warn(&ctrl_info->pci_dev->dev,
6110                                 "scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
6111                                 ctrl_info->scsi_host->host_no, device->bus, device->target,
6112                                 device->lun, msecs_waiting / 1000, cmds_outstanding);
6113                         warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * PQI_HZ) + jiffies;
6114                 }
6115                 usleep_range(1000, 2000);
6116         }
6117
6118         return 0;
6119 }
6120
6121 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
6122         void *context)
6123 {
6124         struct completion *waiting = context;
6125
6126         complete(waiting);
6127 }
6128
6129 #define PQI_LUN_RESET_POLL_COMPLETION_SECS      10
6130
6131 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
6132         struct pqi_scsi_dev *device, struct completion *wait)
6133 {
6134         int rc;
6135         unsigned int wait_secs;
6136         int cmds_outstanding;
6137
6138         wait_secs = 0;
6139
6140         while (1) {
6141                 if (wait_for_completion_io_timeout(wait,
6142                         PQI_LUN_RESET_POLL_COMPLETION_SECS * PQI_HZ)) {
6143                         rc = 0;
6144                         break;
6145                 }
6146
6147                 pqi_check_ctrl_health(ctrl_info);
6148                 if (pqi_ctrl_offline(ctrl_info)) {
6149                         rc = -ENXIO;
6150                         break;
6151                 }
6152
6153                 wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
6154                 cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding);
6155                 dev_warn(&ctrl_info->pci_dev->dev,
6156                         "scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete (%d command(s) outstanding)\n",
6157                         ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun, wait_secs, cmds_outstanding);
6158         }
6159
6160         return rc;
6161 }
6162
6163 #define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS     30
6164
6165 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
6166 {
6167         int rc;
6168         struct pqi_io_request *io_request;
6169         DECLARE_COMPLETION_ONSTACK(wait);
6170         struct pqi_task_management_request *request;
6171
6172         io_request = pqi_alloc_io_request(ctrl_info);
6173         io_request->io_complete_callback = pqi_lun_reset_complete;
6174         io_request->context = &wait;
6175
6176         request = io_request->iu;
6177         memset(request, 0, sizeof(*request));
6178
6179         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
6180         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
6181                 &request->header.iu_length);
6182         put_unaligned_le16(io_request->index, &request->request_id);
6183         memcpy(request->lun_number, device->scsi3addr,
6184                 sizeof(request->lun_number));
6185         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
6186         if (ctrl_info->tmf_iu_timeout_supported)
6187                 put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
6188
6189         pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
6190                 io_request);
6191
6192         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
6193         if (rc == 0)
6194                 rc = io_request->status;
6195
6196         pqi_free_io_request(io_request);
6197
6198         return rc;
6199 }
6200
6201 #define PQI_LUN_RESET_RETRIES                           3
6202 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS              (10 * 1000)
6203 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS          (10 * 60 * 1000)
6204 #define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS   (2 * 60 * 1000)
6205
6206 static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
6207 {
6208         int reset_rc;
6209         int wait_rc;
6210         unsigned int retries;
6211         unsigned long timeout_msecs;
6212
6213         for (retries = 0;;) {
6214                 reset_rc = pqi_lun_reset(ctrl_info, device);
6215                 if (reset_rc == 0 || ++retries > PQI_LUN_RESET_RETRIES)
6216                         break;
6217                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
6218         }
6219
6220         timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
6221                 PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
6222
6223         wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, timeout_msecs);
6224         if (wait_rc && reset_rc == 0)
6225                 reset_rc = wait_rc;
6226
6227         return reset_rc == 0 ? SUCCESS : FAILED;
6228 }
6229
6230 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
6231         struct pqi_scsi_dev *device)
6232 {
6233         int rc;
6234
6235         pqi_ctrl_block_requests(ctrl_info);
6236         pqi_ctrl_wait_until_quiesced(ctrl_info);
6237         pqi_fail_io_queued_for_device(ctrl_info, device);
6238         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
6239         if (rc)
6240                 rc = FAILED;
6241         else
6242                 rc = pqi_lun_reset_with_retries(ctrl_info, device);
6243         pqi_ctrl_unblock_requests(ctrl_info);
6244
6245         return rc;
6246 }
6247
6248 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
6249 {
6250         int rc;
6251         struct Scsi_Host *shost;
6252         struct pqi_ctrl_info *ctrl_info;
6253         struct pqi_scsi_dev *device;
6254
6255         shost = scmd->device->host;
6256         ctrl_info = shost_to_hba(shost);
6257         device = scmd->device->hostdata;
6258
6259         mutex_lock(&ctrl_info->lun_reset_mutex);
6260
6261         dev_err(&ctrl_info->pci_dev->dev,
6262                 "resetting scsi %d:%d:%d:%d due to cmd 0x%02x\n",
6263                 shost->host_no,
6264                 device->bus, device->target, device->lun,
6265                 scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff);
6266
6267         pqi_check_ctrl_health(ctrl_info);
6268         if (pqi_ctrl_offline(ctrl_info))
6269                 rc = FAILED;
6270         else
6271                 rc = pqi_device_reset(ctrl_info, device);
6272
6273         dev_err(&ctrl_info->pci_dev->dev,
6274                 "reset of scsi %d:%d:%d:%d: %s\n",
6275                 shost->host_no, device->bus, device->target, device->lun,
6276                 rc == SUCCESS ? "SUCCESS" : "FAILED");
6277
6278         mutex_unlock(&ctrl_info->lun_reset_mutex);
6279
6280         return rc;
6281 }
6282
6283 static int pqi_slave_alloc(struct scsi_device *sdev)
6284 {
6285         struct pqi_scsi_dev *device;
6286         unsigned long flags;
6287         struct pqi_ctrl_info *ctrl_info;
6288         struct scsi_target *starget;
6289         struct sas_rphy *rphy;
6290
6291         ctrl_info = shost_to_hba(sdev->host);
6292
6293         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6294
6295         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
6296                 starget = scsi_target(sdev);
6297                 rphy = target_to_rphy(starget);
6298                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
6299                 if (device) {
6300                         if (device->target_lun_valid) {
6301                                 device->ignore_device = true;
6302                         } else {
6303                                 device->target = sdev_id(sdev);
6304                                 device->lun = sdev->lun;
6305                                 device->target_lun_valid = true;
6306                         }
6307                 }
6308         } else {
6309                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
6310                         sdev_id(sdev), sdev->lun);
6311         }
6312
6313         if (device) {
6314                 sdev->hostdata = device;
6315                 device->sdev = sdev;
6316                 if (device->queue_depth) {
6317                         device->advertised_queue_depth = device->queue_depth;
6318                         scsi_change_queue_depth(sdev,
6319                                 device->advertised_queue_depth);
6320                 }
6321                 if (pqi_is_logical_device(device)) {
6322                         pqi_disable_write_same(sdev);
6323                 } else {
6324                         sdev->allow_restart = 1;
6325                         if (device->device_type == SA_DEVICE_TYPE_NVME)
6326                                 pqi_disable_write_same(sdev);
6327                 }
6328         }
6329
6330         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6331
6332         return 0;
6333 }
6334
6335 static int pqi_map_queues(struct Scsi_Host *shost)
6336 {
6337         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6338
6339         return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
6340                                         ctrl_info->pci_dev, 0);
6341 }
6342
6343 static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
6344 {
6345         return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
6346 }
6347
6348 static int pqi_slave_configure(struct scsi_device *sdev)
6349 {
6350         int rc = 0;
6351         struct pqi_scsi_dev *device;
6352
6353         device = sdev->hostdata;
6354         device->devtype = sdev->type;
6355
6356         if (pqi_is_tape_changer_device(device) && device->ignore_device) {
6357                 rc = -ENXIO;
6358                 device->ignore_device = false;
6359         }
6360
6361         return rc;
6362 }
6363
6364 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6365 {
6366         struct pci_dev *pci_dev;
6367         u32 subsystem_vendor;
6368         u32 subsystem_device;
6369         cciss_pci_info_struct pciinfo;
6370
6371         if (!arg)
6372                 return -EINVAL;
6373
6374         pci_dev = ctrl_info->pci_dev;
6375
6376         pciinfo.domain = pci_domain_nr(pci_dev->bus);
6377         pciinfo.bus = pci_dev->bus->number;
6378         pciinfo.dev_fn = pci_dev->devfn;
6379         subsystem_vendor = pci_dev->subsystem_vendor;
6380         subsystem_device = pci_dev->subsystem_device;
6381         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
6382
6383         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
6384                 return -EFAULT;
6385
6386         return 0;
6387 }
6388
6389 static int pqi_getdrivver_ioctl(void __user *arg)
6390 {
6391         u32 version;
6392
6393         if (!arg)
6394                 return -EINVAL;
6395
6396         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
6397                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
6398
6399         if (copy_to_user(arg, &version, sizeof(version)))
6400                 return -EFAULT;
6401
6402         return 0;
6403 }
6404
6405 struct ciss_error_info {
6406         u8      scsi_status;
6407         int     command_status;
6408         size_t  sense_data_length;
6409 };
6410
6411 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
6412         struct ciss_error_info *ciss_error_info)
6413 {
6414         int ciss_cmd_status;
6415         size_t sense_data_length;
6416
6417         switch (pqi_error_info->data_out_result) {
6418         case PQI_DATA_IN_OUT_GOOD:
6419                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
6420                 break;
6421         case PQI_DATA_IN_OUT_UNDERFLOW:
6422                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
6423                 break;
6424         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
6425                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
6426                 break;
6427         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
6428         case PQI_DATA_IN_OUT_BUFFER_ERROR:
6429         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
6430         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
6431         case PQI_DATA_IN_OUT_ERROR:
6432                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
6433                 break;
6434         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
6435         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
6436         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
6437         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
6438         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
6439         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
6440         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
6441         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
6442         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
6443         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
6444                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
6445                 break;
6446         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
6447                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
6448                 break;
6449         case PQI_DATA_IN_OUT_ABORTED:
6450                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
6451                 break;
6452         case PQI_DATA_IN_OUT_TIMEOUT:
6453                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
6454                 break;
6455         default:
6456                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
6457                 break;
6458         }
6459
6460         sense_data_length =
6461                 get_unaligned_le16(&pqi_error_info->sense_data_length);
6462         if (sense_data_length == 0)
6463                 sense_data_length =
6464                 get_unaligned_le16(&pqi_error_info->response_data_length);
6465         if (sense_data_length)
6466                 if (sense_data_length > sizeof(pqi_error_info->data))
6467                         sense_data_length = sizeof(pqi_error_info->data);
6468
6469         ciss_error_info->scsi_status = pqi_error_info->status;
6470         ciss_error_info->command_status = ciss_cmd_status;
6471         ciss_error_info->sense_data_length = sense_data_length;
6472 }
6473
6474 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
6475 {
6476         int rc;
6477         char *kernel_buffer = NULL;
6478         u16 iu_length;
6479         size_t sense_data_length;
6480         IOCTL_Command_struct iocommand;
6481         struct pqi_raid_path_request request;
6482         struct pqi_raid_error_info pqi_error_info;
6483         struct ciss_error_info ciss_error_info;
6484
6485         if (pqi_ctrl_offline(ctrl_info))
6486                 return -ENXIO;
6487         if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
6488                 return -EBUSY;
6489         if (!arg)
6490                 return -EINVAL;
6491         if (!capable(CAP_SYS_RAWIO))
6492                 return -EPERM;
6493         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
6494                 return -EFAULT;
6495         if (iocommand.buf_size < 1 &&
6496                 iocommand.Request.Type.Direction != XFER_NONE)
6497                 return -EINVAL;
6498         if (iocommand.Request.CDBLen > sizeof(request.cdb))
6499                 return -EINVAL;
6500         if (iocommand.Request.Type.Type != TYPE_CMD)
6501                 return -EINVAL;
6502
6503         switch (iocommand.Request.Type.Direction) {
6504         case XFER_NONE:
6505         case XFER_WRITE:
6506         case XFER_READ:
6507         case XFER_READ | XFER_WRITE:
6508                 break;
6509         default:
6510                 return -EINVAL;
6511         }
6512
6513         if (iocommand.buf_size > 0) {
6514                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6515                 if (!kernel_buffer)
6516                         return -ENOMEM;
6517                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6518                         if (copy_from_user(kernel_buffer, iocommand.buf,
6519                                 iocommand.buf_size)) {
6520                                 rc = -EFAULT;
6521                                 goto out;
6522                         }
6523                 } else {
6524                         memset(kernel_buffer, 0, iocommand.buf_size);
6525                 }
6526         }
6527
6528         memset(&request, 0, sizeof(request));
6529
6530         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6531         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6532                 PQI_REQUEST_HEADER_LENGTH;
6533         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6534                 sizeof(request.lun_number));
6535         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6536         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6537
6538         switch (iocommand.Request.Type.Direction) {
6539         case XFER_NONE:
6540                 request.data_direction = SOP_NO_DIRECTION_FLAG;
6541                 break;
6542         case XFER_WRITE:
6543                 request.data_direction = SOP_WRITE_FLAG;
6544                 break;
6545         case XFER_READ:
6546                 request.data_direction = SOP_READ_FLAG;
6547                 break;
6548         case XFER_READ | XFER_WRITE:
6549                 request.data_direction = SOP_BIDIRECTIONAL;
6550                 break;
6551         }
6552
6553         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6554
6555         if (iocommand.buf_size > 0) {
6556                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6557
6558                 rc = pqi_map_single(ctrl_info->pci_dev,
6559                         &request.sg_descriptors[0], kernel_buffer,
6560                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6561                 if (rc)
6562                         goto out;
6563
6564                 iu_length += sizeof(request.sg_descriptors[0]);
6565         }
6566
6567         put_unaligned_le16(iu_length, &request.header.iu_length);
6568
6569         if (ctrl_info->raid_iu_timeout_supported)
6570                 put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6571
6572         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6573                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
6574
6575         if (iocommand.buf_size > 0)
6576                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6577                         DMA_BIDIRECTIONAL);
6578
6579         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6580
6581         if (rc == 0) {
6582                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6583                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6584                 iocommand.error_info.CommandStatus =
6585                         ciss_error_info.command_status;
6586                 sense_data_length = ciss_error_info.sense_data_length;
6587                 if (sense_data_length) {
6588                         if (sense_data_length >
6589                                 sizeof(iocommand.error_info.SenseInfo))
6590                                 sense_data_length =
6591                                         sizeof(iocommand.error_info.SenseInfo);
6592                         memcpy(iocommand.error_info.SenseInfo,
6593                                 pqi_error_info.data, sense_data_length);
6594                         iocommand.error_info.SenseLen = sense_data_length;
6595                 }
6596         }
6597
6598         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6599                 rc = -EFAULT;
6600                 goto out;
6601         }
6602
6603         if (rc == 0 && iocommand.buf_size > 0 &&
6604                 (iocommand.Request.Type.Direction & XFER_READ)) {
6605                 if (copy_to_user(iocommand.buf, kernel_buffer,
6606                         iocommand.buf_size)) {
6607                         rc = -EFAULT;
6608                 }
6609         }
6610
6611 out:
6612         kfree(kernel_buffer);
6613
6614         return rc;
6615 }
6616
6617 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6618                      void __user *arg)
6619 {
6620         int rc;
6621         struct pqi_ctrl_info *ctrl_info;
6622
6623         ctrl_info = shost_to_hba(sdev->host);
6624
6625         switch (cmd) {
6626         case CCISS_DEREGDISK:
6627         case CCISS_REGNEWDISK:
6628         case CCISS_REGNEWD:
6629                 rc = pqi_scan_scsi_devices(ctrl_info);
6630                 break;
6631         case CCISS_GETPCIINFO:
6632                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6633                 break;
6634         case CCISS_GETDRIVVER:
6635                 rc = pqi_getdrivver_ioctl(arg);
6636                 break;
6637         case CCISS_PASSTHRU:
6638                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6639                 break;
6640         default:
6641                 rc = -EINVAL;
6642                 break;
6643         }
6644
6645         return rc;
6646 }
6647
6648 static ssize_t pqi_firmware_version_show(struct device *dev,
6649         struct device_attribute *attr, char *buffer)
6650 {
6651         struct Scsi_Host *shost;
6652         struct pqi_ctrl_info *ctrl_info;
6653
6654         shost = class_to_shost(dev);
6655         ctrl_info = shost_to_hba(shost);
6656
6657         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6658 }
6659
6660 static ssize_t pqi_driver_version_show(struct device *dev,
6661         struct device_attribute *attr, char *buffer)
6662 {
6663         return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6664 }
6665
6666 static ssize_t pqi_serial_number_show(struct device *dev,
6667         struct device_attribute *attr, char *buffer)
6668 {
6669         struct Scsi_Host *shost;
6670         struct pqi_ctrl_info *ctrl_info;
6671
6672         shost = class_to_shost(dev);
6673         ctrl_info = shost_to_hba(shost);
6674
6675         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6676 }
6677
6678 static ssize_t pqi_model_show(struct device *dev,
6679         struct device_attribute *attr, char *buffer)
6680 {
6681         struct Scsi_Host *shost;
6682         struct pqi_ctrl_info *ctrl_info;
6683
6684         shost = class_to_shost(dev);
6685         ctrl_info = shost_to_hba(shost);
6686
6687         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6688 }
6689
6690 static ssize_t pqi_vendor_show(struct device *dev,
6691         struct device_attribute *attr, char *buffer)
6692 {
6693         struct Scsi_Host *shost;
6694         struct pqi_ctrl_info *ctrl_info;
6695
6696         shost = class_to_shost(dev);
6697         ctrl_info = shost_to_hba(shost);
6698
6699         return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6700 }
6701
6702 static ssize_t pqi_host_rescan_store(struct device *dev,
6703         struct device_attribute *attr, const char *buffer, size_t count)
6704 {
6705         struct Scsi_Host *shost = class_to_shost(dev);
6706
6707         pqi_scan_start(shost);
6708
6709         return count;
6710 }
6711
6712 static ssize_t pqi_lockup_action_show(struct device *dev,
6713         struct device_attribute *attr, char *buffer)
6714 {
6715         int count = 0;
6716         unsigned int i;
6717
6718         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6719                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6720                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6721                                 "[%s] ", pqi_lockup_actions[i].name);
6722                 else
6723                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6724                                 "%s ", pqi_lockup_actions[i].name);
6725         }
6726
6727         count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6728
6729         return count;
6730 }
6731
6732 static ssize_t pqi_lockup_action_store(struct device *dev,
6733         struct device_attribute *attr, const char *buffer, size_t count)
6734 {
6735         unsigned int i;
6736         char *action_name;
6737         char action_name_buffer[32];
6738
6739         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6740         action_name = strstrip(action_name_buffer);
6741
6742         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6743                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6744                         pqi_lockup_action = pqi_lockup_actions[i].action;
6745                         return count;
6746                 }
6747         }
6748
6749         return -EINVAL;
6750 }
6751
6752 static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
6753         struct device_attribute *attr, char *buffer)
6754 {
6755         struct Scsi_Host *shost = class_to_shost(dev);
6756         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6757
6758         return scnprintf(buffer, 10, "%x\n",
6759                         ctrl_info->enable_stream_detection);
6760 }
6761
6762 static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
6763         struct device_attribute *attr, const char *buffer, size_t count)
6764 {
6765         struct Scsi_Host *shost = class_to_shost(dev);
6766         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6767         u8 set_stream_detection = 0;
6768
6769         if (kstrtou8(buffer, 0, &set_stream_detection))
6770                 return -EINVAL;
6771
6772         if (set_stream_detection > 0)
6773                 set_stream_detection = 1;
6774
6775         ctrl_info->enable_stream_detection = set_stream_detection;
6776
6777         return count;
6778 }
6779
6780 static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
6781         struct device_attribute *attr, char *buffer)
6782 {
6783         struct Scsi_Host *shost = class_to_shost(dev);
6784         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6785
6786         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
6787 }
6788
6789 static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
6790         struct device_attribute *attr, const char *buffer, size_t count)
6791 {
6792         struct Scsi_Host *shost = class_to_shost(dev);
6793         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6794         u8 set_r5_writes = 0;
6795
6796         if (kstrtou8(buffer, 0, &set_r5_writes))
6797                 return -EINVAL;
6798
6799         if (set_r5_writes > 0)
6800                 set_r5_writes = 1;
6801
6802         ctrl_info->enable_r5_writes = set_r5_writes;
6803
6804         return count;
6805 }
6806
6807 static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
6808         struct device_attribute *attr, char *buffer)
6809 {
6810         struct Scsi_Host *shost = class_to_shost(dev);
6811         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6812
6813         return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
6814 }
6815
6816 static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
6817         struct device_attribute *attr, const char *buffer, size_t count)
6818 {
6819         struct Scsi_Host *shost = class_to_shost(dev);
6820         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
6821         u8 set_r6_writes = 0;
6822
6823         if (kstrtou8(buffer, 0, &set_r6_writes))
6824                 return -EINVAL;
6825
6826         if (set_r6_writes > 0)
6827                 set_r6_writes = 1;
6828
6829         ctrl_info->enable_r6_writes = set_r6_writes;
6830
6831         return count;
6832 }
6833
6834 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
6835 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
6836 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
6837 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
6838 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
6839 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6840 static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
6841         pqi_lockup_action_store);
6842 static DEVICE_ATTR(enable_stream_detection, 0644,
6843         pqi_host_enable_stream_detection_show,
6844         pqi_host_enable_stream_detection_store);
6845 static DEVICE_ATTR(enable_r5_writes, 0644,
6846         pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
6847 static DEVICE_ATTR(enable_r6_writes, 0644,
6848         pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
6849
6850 static struct attribute *pqi_shost_attrs[] = {
6851         &dev_attr_driver_version.attr,
6852         &dev_attr_firmware_version.attr,
6853         &dev_attr_model.attr,
6854         &dev_attr_serial_number.attr,
6855         &dev_attr_vendor.attr,
6856         &dev_attr_rescan.attr,
6857         &dev_attr_lockup_action.attr,
6858         &dev_attr_enable_stream_detection.attr,
6859         &dev_attr_enable_r5_writes.attr,
6860         &dev_attr_enable_r6_writes.attr,
6861         NULL
6862 };
6863
6864 ATTRIBUTE_GROUPS(pqi_shost);
6865
6866 static ssize_t pqi_unique_id_show(struct device *dev,
6867         struct device_attribute *attr, char *buffer)
6868 {
6869         struct pqi_ctrl_info *ctrl_info;
6870         struct scsi_device *sdev;
6871         struct pqi_scsi_dev *device;
6872         unsigned long flags;
6873         u8 unique_id[16];
6874
6875         sdev = to_scsi_device(dev);
6876         ctrl_info = shost_to_hba(sdev->host);
6877
6878         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6879
6880         device = sdev->hostdata;
6881         if (!device) {
6882                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6883                 return -ENODEV;
6884         }
6885
6886         if (device->is_physical_device)
6887                 memcpy(unique_id, device->wwid, sizeof(device->wwid));
6888         else
6889                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
6890
6891         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6892
6893         return scnprintf(buffer, PAGE_SIZE,
6894                 "%02X%02X%02X%02X%02X%02X%02X%02X"
6895                 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
6896                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
6897                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
6898                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
6899                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
6900 }
6901
6902 static ssize_t pqi_lunid_show(struct device *dev,
6903         struct device_attribute *attr, char *buffer)
6904 {
6905         struct pqi_ctrl_info *ctrl_info;
6906         struct scsi_device *sdev;
6907         struct pqi_scsi_dev *device;
6908         unsigned long flags;
6909         u8 lunid[8];
6910
6911         sdev = to_scsi_device(dev);
6912         ctrl_info = shost_to_hba(sdev->host);
6913
6914         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6915
6916         device = sdev->hostdata;
6917         if (!device) {
6918                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6919                 return -ENODEV;
6920         }
6921
6922         memcpy(lunid, device->scsi3addr, sizeof(lunid));
6923
6924         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6925
6926         return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
6927 }
6928
6929 #define MAX_PATHS       8
6930
6931 static ssize_t pqi_path_info_show(struct device *dev,
6932         struct device_attribute *attr, char *buf)
6933 {
6934         struct pqi_ctrl_info *ctrl_info;
6935         struct scsi_device *sdev;
6936         struct pqi_scsi_dev *device;
6937         unsigned long flags;
6938         int i;
6939         int output_len = 0;
6940         u8 box;
6941         u8 bay;
6942         u8 path_map_index;
6943         char *active;
6944         u8 phys_connector[2];
6945
6946         sdev = to_scsi_device(dev);
6947         ctrl_info = shost_to_hba(sdev->host);
6948
6949         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6950
6951         device = sdev->hostdata;
6952         if (!device) {
6953                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6954                 return -ENODEV;
6955         }
6956
6957         bay = device->bay;
6958         for (i = 0; i < MAX_PATHS; i++) {
6959                 path_map_index = 1 << i;
6960                 if (i == device->active_path_index)
6961                         active = "Active";
6962                 else if (device->path_map & path_map_index)
6963                         active = "Inactive";
6964                 else
6965                         continue;
6966
6967                 output_len += scnprintf(buf + output_len,
6968                                         PAGE_SIZE - output_len,
6969                                         "[%d:%d:%d:%d] %20.20s ",
6970                                         ctrl_info->scsi_host->host_no,
6971                                         device->bus, device->target,
6972                                         device->lun,
6973                                         scsi_device_type(device->devtype));
6974
6975                 if (device->devtype == TYPE_RAID ||
6976                         pqi_is_logical_device(device))
6977                         goto end_buffer;
6978
6979                 memcpy(&phys_connector, &device->phys_connector[i],
6980                         sizeof(phys_connector));
6981                 if (phys_connector[0] < '0')
6982                         phys_connector[0] = '0';
6983                 if (phys_connector[1] < '0')
6984                         phys_connector[1] = '0';
6985
6986                 output_len += scnprintf(buf + output_len,
6987                                         PAGE_SIZE - output_len,
6988                                         "PORT: %.2s ", phys_connector);
6989
6990                 box = device->box[i];
6991                 if (box != 0 && box != 0xFF)
6992                         output_len += scnprintf(buf + output_len,
6993                                                 PAGE_SIZE - output_len,
6994                                                 "BOX: %hhu ", box);
6995
6996                 if ((device->devtype == TYPE_DISK ||
6997                         device->devtype == TYPE_ZBC) &&
6998                         pqi_expose_device(device))
6999                         output_len += scnprintf(buf + output_len,
7000                                                 PAGE_SIZE - output_len,
7001                                                 "BAY: %hhu ", bay);
7002
7003 end_buffer:
7004                 output_len += scnprintf(buf + output_len,
7005                                         PAGE_SIZE - output_len,
7006                                         "%s\n", active);
7007         }
7008
7009         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7010
7011         return output_len;
7012 }
7013
7014 static ssize_t pqi_sas_address_show(struct device *dev,
7015         struct device_attribute *attr, char *buffer)
7016 {
7017         struct pqi_ctrl_info *ctrl_info;
7018         struct scsi_device *sdev;
7019         struct pqi_scsi_dev *device;
7020         unsigned long flags;
7021         u64 sas_address;
7022
7023         sdev = to_scsi_device(dev);
7024         ctrl_info = shost_to_hba(sdev->host);
7025
7026         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7027
7028         device = sdev->hostdata;
7029         if (!device || !pqi_is_device_with_sas_address(device)) {
7030                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7031                 return -ENODEV;
7032         }
7033
7034         sas_address = device->sas_address;
7035
7036         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7037
7038         return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
7039 }
7040
7041 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
7042         struct device_attribute *attr, char *buffer)
7043 {
7044         struct pqi_ctrl_info *ctrl_info;
7045         struct scsi_device *sdev;
7046         struct pqi_scsi_dev *device;
7047         unsigned long flags;
7048
7049         sdev = to_scsi_device(dev);
7050         ctrl_info = shost_to_hba(sdev->host);
7051
7052         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7053
7054         device = sdev->hostdata;
7055         if (!device) {
7056                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7057                 return -ENODEV;
7058         }
7059
7060         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
7061         buffer[1] = '\n';
7062         buffer[2] = '\0';
7063
7064         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7065
7066         return 2;
7067 }
7068
7069 static ssize_t pqi_raid_level_show(struct device *dev,
7070         struct device_attribute *attr, char *buffer)
7071 {
7072         struct pqi_ctrl_info *ctrl_info;
7073         struct scsi_device *sdev;
7074         struct pqi_scsi_dev *device;
7075         unsigned long flags;
7076         char *raid_level;
7077
7078         sdev = to_scsi_device(dev);
7079         ctrl_info = shost_to_hba(sdev->host);
7080
7081         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7082
7083         device = sdev->hostdata;
7084         if (!device) {
7085                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7086                 return -ENODEV;
7087         }
7088
7089         if (pqi_is_logical_device(device))
7090                 raid_level = pqi_raid_level_to_string(device->raid_level);
7091         else
7092                 raid_level = "N/A";
7093
7094         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7095
7096         return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
7097 }
7098
7099 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
7100         struct device_attribute *attr, char *buffer)
7101 {
7102         struct pqi_ctrl_info *ctrl_info;
7103         struct scsi_device *sdev;
7104         struct pqi_scsi_dev *device;
7105         unsigned long flags;
7106         int raid_bypass_cnt;
7107
7108         sdev = to_scsi_device(dev);
7109         ctrl_info = shost_to_hba(sdev->host);
7110
7111         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
7112
7113         device = sdev->hostdata;
7114         if (!device) {
7115                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7116                 return -ENODEV;
7117         }
7118
7119         raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt);
7120
7121         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
7122
7123         return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
7124 }
7125
7126 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
7127 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
7128 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
7129 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
7130 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
7131 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
7132 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
7133
7134 static struct attribute *pqi_sdev_attrs[] = {
7135         &dev_attr_lunid.attr,
7136         &dev_attr_unique_id.attr,
7137         &dev_attr_path_info.attr,
7138         &dev_attr_sas_address.attr,
7139         &dev_attr_ssd_smart_path_enabled.attr,
7140         &dev_attr_raid_level.attr,
7141         &dev_attr_raid_bypass_cnt.attr,
7142         NULL
7143 };
7144
7145 ATTRIBUTE_GROUPS(pqi_sdev);
7146
7147 static struct scsi_host_template pqi_driver_template = {
7148         .module = THIS_MODULE,
7149         .name = DRIVER_NAME_SHORT,
7150         .proc_name = DRIVER_NAME_SHORT,
7151         .queuecommand = pqi_scsi_queue_command,
7152         .scan_start = pqi_scan_start,
7153         .scan_finished = pqi_scan_finished,
7154         .this_id = -1,
7155         .eh_device_reset_handler = pqi_eh_device_reset_handler,
7156         .ioctl = pqi_ioctl,
7157         .slave_alloc = pqi_slave_alloc,
7158         .slave_configure = pqi_slave_configure,
7159         .map_queues = pqi_map_queues,
7160         .sdev_groups = pqi_sdev_groups,
7161         .shost_groups = pqi_shost_groups,
7162 };
7163
7164 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
7165 {
7166         int rc;
7167         struct Scsi_Host *shost;
7168
7169         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
7170         if (!shost) {
7171                 dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
7172                 return -ENOMEM;
7173         }
7174
7175         shost->io_port = 0;
7176         shost->n_io_port = 0;
7177         shost->this_id = -1;
7178         shost->max_channel = PQI_MAX_BUS;
7179         shost->max_cmd_len = MAX_COMMAND_SIZE;
7180         shost->max_lun = ~0;
7181         shost->max_id = ~0;
7182         shost->max_sectors = ctrl_info->max_sectors;
7183         shost->can_queue = ctrl_info->scsi_ml_can_queue;
7184         shost->cmd_per_lun = shost->can_queue;
7185         shost->sg_tablesize = ctrl_info->sg_tablesize;
7186         shost->transportt = pqi_sas_transport_template;
7187         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
7188         shost->unique_id = shost->irq;
7189         shost->nr_hw_queues = ctrl_info->num_queue_groups;
7190         shost->host_tagset = 1;
7191         shost->hostdata[0] = (unsigned long)ctrl_info;
7192
7193         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
7194         if (rc) {
7195                 dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
7196                 goto free_host;
7197         }
7198
7199         rc = pqi_add_sas_host(shost, ctrl_info);
7200         if (rc) {
7201                 dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
7202                 goto remove_host;
7203         }
7204
7205         ctrl_info->scsi_host = shost;
7206
7207         return 0;
7208
7209 remove_host:
7210         scsi_remove_host(shost);
7211 free_host:
7212         scsi_host_put(shost);
7213
7214         return rc;
7215 }
7216
7217 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
7218 {
7219         struct Scsi_Host *shost;
7220
7221         pqi_delete_sas_host(ctrl_info);
7222
7223         shost = ctrl_info->scsi_host;
7224         if (!shost)
7225                 return;
7226
7227         scsi_remove_host(shost);
7228         scsi_host_put(shost);
7229 }
7230
7231 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
7232 {
7233         int rc = 0;
7234         struct pqi_device_registers __iomem *pqi_registers;
7235         unsigned long timeout;
7236         unsigned int timeout_msecs;
7237         union pqi_reset_register reset_reg;
7238
7239         pqi_registers = ctrl_info->pqi_registers;
7240         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
7241         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
7242
7243         while (1) {
7244                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
7245                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
7246                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
7247                         break;
7248                 pqi_check_ctrl_health(ctrl_info);
7249                 if (pqi_ctrl_offline(ctrl_info)) {
7250                         rc = -ENXIO;
7251                         break;
7252                 }
7253                 if (time_after(jiffies, timeout)) {
7254                         rc = -ETIMEDOUT;
7255                         break;
7256                 }
7257         }
7258
7259         return rc;
7260 }
7261
7262 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
7263 {
7264         int rc;
7265         union pqi_reset_register reset_reg;
7266
7267         if (ctrl_info->pqi_reset_quiesce_supported) {
7268                 rc = sis_pqi_reset_quiesce(ctrl_info);
7269                 if (rc) {
7270                         dev_err(&ctrl_info->pci_dev->dev,
7271                                 "PQI reset failed during quiesce with error %d\n", rc);
7272                         return rc;
7273                 }
7274         }
7275
7276         reset_reg.all_bits = 0;
7277         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
7278         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
7279
7280         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
7281
7282         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
7283         if (rc)
7284                 dev_err(&ctrl_info->pci_dev->dev,
7285                         "PQI reset failed with error %d\n", rc);
7286
7287         return rc;
7288 }
7289
7290 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
7291 {
7292         int rc;
7293         struct bmic_sense_subsystem_info *sense_info;
7294
7295         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
7296         if (!sense_info)
7297                 return -ENOMEM;
7298
7299         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
7300         if (rc)
7301                 goto out;
7302
7303         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
7304                 sizeof(sense_info->ctrl_serial_number));
7305         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
7306
7307 out:
7308         kfree(sense_info);
7309
7310         return rc;
7311 }
7312
7313 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
7314 {
7315         int rc;
7316         struct bmic_identify_controller *identify;
7317
7318         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
7319         if (!identify)
7320                 return -ENOMEM;
7321
7322         rc = pqi_identify_controller(ctrl_info, identify);
7323         if (rc)
7324                 goto out;
7325
7326         if (get_unaligned_le32(&identify->extra_controller_flags) &
7327                 BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
7328                 memcpy(ctrl_info->firmware_version,
7329                         identify->firmware_version_long,
7330                         sizeof(identify->firmware_version_long));
7331         } else {
7332                 memcpy(ctrl_info->firmware_version,
7333                         identify->firmware_version_short,
7334                         sizeof(identify->firmware_version_short));
7335                 ctrl_info->firmware_version
7336                         [sizeof(identify->firmware_version_short)] = '\0';
7337                 snprintf(ctrl_info->firmware_version +
7338                         strlen(ctrl_info->firmware_version),
7339                         sizeof(ctrl_info->firmware_version) -
7340                         sizeof(identify->firmware_version_short),
7341                         "-%u",
7342                         get_unaligned_le16(&identify->firmware_build_number));
7343         }
7344
7345         memcpy(ctrl_info->model, identify->product_id,
7346                 sizeof(identify->product_id));
7347         ctrl_info->model[sizeof(identify->product_id)] = '\0';
7348
7349         memcpy(ctrl_info->vendor, identify->vendor_id,
7350                 sizeof(identify->vendor_id));
7351         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
7352
7353 out:
7354         kfree(identify);
7355
7356         return rc;
7357 }
7358
7359 struct pqi_config_table_section_info {
7360         struct pqi_ctrl_info *ctrl_info;
7361         void            *section;
7362         u32             section_offset;
7363         void __iomem    *section_iomem_addr;
7364 };
7365
7366 static inline bool pqi_is_firmware_feature_supported(
7367         struct pqi_config_table_firmware_features *firmware_features,
7368         unsigned int bit_position)
7369 {
7370         unsigned int byte_index;
7371
7372         byte_index = bit_position / BITS_PER_BYTE;
7373
7374         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
7375                 return false;
7376
7377         return firmware_features->features_supported[byte_index] &
7378                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7379 }
7380
7381 static inline bool pqi_is_firmware_feature_enabled(
7382         struct pqi_config_table_firmware_features *firmware_features,
7383         void __iomem *firmware_features_iomem_addr,
7384         unsigned int bit_position)
7385 {
7386         unsigned int byte_index;
7387         u8 __iomem *features_enabled_iomem_addr;
7388
7389         byte_index = (bit_position / BITS_PER_BYTE) +
7390                 (le16_to_cpu(firmware_features->num_elements) * 2);
7391
7392         features_enabled_iomem_addr = firmware_features_iomem_addr +
7393                 offsetof(struct pqi_config_table_firmware_features,
7394                         features_supported) + byte_index;
7395
7396         return *((__force u8 *)features_enabled_iomem_addr) &
7397                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
7398 }
7399
7400 static inline void pqi_request_firmware_feature(
7401         struct pqi_config_table_firmware_features *firmware_features,
7402         unsigned int bit_position)
7403 {
7404         unsigned int byte_index;
7405
7406         byte_index = (bit_position / BITS_PER_BYTE) +
7407                 le16_to_cpu(firmware_features->num_elements);
7408
7409         firmware_features->features_supported[byte_index] |=
7410                 (1 << (bit_position % BITS_PER_BYTE));
7411 }
7412
7413 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
7414         u16 first_section, u16 last_section)
7415 {
7416         struct pqi_vendor_general_request request;
7417
7418         memset(&request, 0, sizeof(request));
7419
7420         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7421         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7422                 &request.header.iu_length);
7423         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
7424                 &request.function_code);
7425         put_unaligned_le16(first_section,
7426                 &request.data.config_table_update.first_section);
7427         put_unaligned_le16(last_section,
7428                 &request.data.config_table_update.last_section);
7429
7430         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
7431 }
7432
7433 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
7434         struct pqi_config_table_firmware_features *firmware_features,
7435         void __iomem *firmware_features_iomem_addr)
7436 {
7437         void *features_requested;
7438         void __iomem *features_requested_iomem_addr;
7439         void __iomem *host_max_known_feature_iomem_addr;
7440
7441         features_requested = firmware_features->features_supported +
7442                 le16_to_cpu(firmware_features->num_elements);
7443
7444         features_requested_iomem_addr = firmware_features_iomem_addr +
7445                 (features_requested - (void *)firmware_features);
7446
7447         memcpy_toio(features_requested_iomem_addr, features_requested,
7448                 le16_to_cpu(firmware_features->num_elements));
7449
7450         if (pqi_is_firmware_feature_supported(firmware_features,
7451                 PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
7452                 host_max_known_feature_iomem_addr =
7453                         features_requested_iomem_addr +
7454                         (le16_to_cpu(firmware_features->num_elements) * 2) +
7455                         sizeof(__le16);
7456                 writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
7457                         host_max_known_feature_iomem_addr);
7458         }
7459
7460         return pqi_config_table_update(ctrl_info,
7461                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
7462                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
7463 }
7464
7465 struct pqi_firmware_feature {
7466         char            *feature_name;
7467         unsigned int    feature_bit;
7468         bool            supported;
7469         bool            enabled;
7470         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
7471                 struct pqi_firmware_feature *firmware_feature);
7472 };
7473
7474 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
7475         struct pqi_firmware_feature *firmware_feature)
7476 {
7477         if (!firmware_feature->supported) {
7478                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
7479                         firmware_feature->feature_name);
7480                 return;
7481         }
7482
7483         if (firmware_feature->enabled) {
7484                 dev_info(&ctrl_info->pci_dev->dev,
7485                         "%s enabled\n", firmware_feature->feature_name);
7486                 return;
7487         }
7488
7489         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
7490                 firmware_feature->feature_name);
7491 }
7492
7493 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
7494         struct pqi_firmware_feature *firmware_feature)
7495 {
7496         switch (firmware_feature->feature_bit) {
7497         case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
7498                 ctrl_info->enable_r1_writes = firmware_feature->enabled;
7499                 break;
7500         case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
7501                 ctrl_info->enable_r5_writes = firmware_feature->enabled;
7502                 break;
7503         case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
7504                 ctrl_info->enable_r6_writes = firmware_feature->enabled;
7505                 break;
7506         case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
7507                 ctrl_info->soft_reset_handshake_supported =
7508                         firmware_feature->enabled &&
7509                         pqi_read_soft_reset_status(ctrl_info);
7510                 break;
7511         case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
7512                 ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
7513                 break;
7514         case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
7515                 ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
7516                 break;
7517         case PQI_FIRMWARE_FEATURE_UNIQUE_WWID_IN_REPORT_PHYS_LUN:
7518                 ctrl_info->unique_wwid_in_report_phys_lun_supported =
7519                         firmware_feature->enabled;
7520                 break;
7521         case PQI_FIRMWARE_FEATURE_FW_TRIAGE:
7522                 ctrl_info->firmware_triage_supported = firmware_feature->enabled;
7523                 pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
7524                 break;
7525         case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
7526                 ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
7527                 break;
7528         }
7529
7530         pqi_firmware_feature_status(ctrl_info, firmware_feature);
7531 }
7532
7533 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
7534         struct pqi_firmware_feature *firmware_feature)
7535 {
7536         if (firmware_feature->feature_status)
7537                 firmware_feature->feature_status(ctrl_info, firmware_feature);
7538 }
7539
7540 static DEFINE_MUTEX(pqi_firmware_features_mutex);
7541
7542 static struct pqi_firmware_feature pqi_firmware_features[] = {
7543         {
7544                 .feature_name = "Online Firmware Activation",
7545                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
7546                 .feature_status = pqi_firmware_feature_status,
7547         },
7548         {
7549                 .feature_name = "Serial Management Protocol",
7550                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
7551                 .feature_status = pqi_firmware_feature_status,
7552         },
7553         {
7554                 .feature_name = "Maximum Known Feature",
7555                 .feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
7556                 .feature_status = pqi_firmware_feature_status,
7557         },
7558         {
7559                 .feature_name = "RAID 0 Read Bypass",
7560                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
7561                 .feature_status = pqi_firmware_feature_status,
7562         },
7563         {
7564                 .feature_name = "RAID 1 Read Bypass",
7565                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
7566                 .feature_status = pqi_firmware_feature_status,
7567         },
7568         {
7569                 .feature_name = "RAID 5 Read Bypass",
7570                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
7571                 .feature_status = pqi_firmware_feature_status,
7572         },
7573         {
7574                 .feature_name = "RAID 6 Read Bypass",
7575                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
7576                 .feature_status = pqi_firmware_feature_status,
7577         },
7578         {
7579                 .feature_name = "RAID 0 Write Bypass",
7580                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
7581                 .feature_status = pqi_firmware_feature_status,
7582         },
7583         {
7584                 .feature_name = "RAID 1 Write Bypass",
7585                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
7586                 .feature_status = pqi_ctrl_update_feature_flags,
7587         },
7588         {
7589                 .feature_name = "RAID 5 Write Bypass",
7590                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
7591                 .feature_status = pqi_ctrl_update_feature_flags,
7592         },
7593         {
7594                 .feature_name = "RAID 6 Write Bypass",
7595                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
7596                 .feature_status = pqi_ctrl_update_feature_flags,
7597         },
7598         {
7599                 .feature_name = "New Soft Reset Handshake",
7600                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
7601                 .feature_status = pqi_ctrl_update_feature_flags,
7602         },
7603         {
7604                 .feature_name = "RAID IU Timeout",
7605                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
7606                 .feature_status = pqi_ctrl_update_feature_flags,
7607         },
7608         {
7609                 .feature_name = "TMF IU Timeout",
7610                 .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
7611                 .feature_status = pqi_ctrl_update_feature_flags,
7612         },
7613         {
7614                 .feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
7615                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
7616                 .feature_status = pqi_firmware_feature_status,
7617         },
7618         {
7619                 .feature_name = "Unique WWID in Report Physical LUN",
7620                 .feature_bit = PQI_FIRMWARE_FEATURE_UNIQUE_WWID_IN_REPORT_PHYS_LUN,
7621                 .feature_status = pqi_ctrl_update_feature_flags,
7622         },
7623         {
7624                 .feature_name = "Firmware Triage",
7625                 .feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
7626                 .feature_status = pqi_ctrl_update_feature_flags,
7627         },
7628         {
7629                 .feature_name = "RPL Extended Formats 4 and 5",
7630                 .feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
7631                 .feature_status = pqi_ctrl_update_feature_flags,
7632         },
7633 };
7634
7635 static void pqi_process_firmware_features(
7636         struct pqi_config_table_section_info *section_info)
7637 {
7638         int rc;
7639         struct pqi_ctrl_info *ctrl_info;
7640         struct pqi_config_table_firmware_features *firmware_features;
7641         void __iomem *firmware_features_iomem_addr;
7642         unsigned int i;
7643         unsigned int num_features_supported;
7644
7645         ctrl_info = section_info->ctrl_info;
7646         firmware_features = section_info->section;
7647         firmware_features_iomem_addr = section_info->section_iomem_addr;
7648
7649         for (i = 0, num_features_supported = 0;
7650                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
7651                 if (pqi_is_firmware_feature_supported(firmware_features,
7652                         pqi_firmware_features[i].feature_bit)) {
7653                         pqi_firmware_features[i].supported = true;
7654                         num_features_supported++;
7655                 } else {
7656                         pqi_firmware_feature_update(ctrl_info,
7657                                 &pqi_firmware_features[i]);
7658                 }
7659         }
7660
7661         if (num_features_supported == 0)
7662                 return;
7663
7664         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7665                 if (!pqi_firmware_features[i].supported)
7666                         continue;
7667                 pqi_request_firmware_feature(firmware_features,
7668                         pqi_firmware_features[i].feature_bit);
7669         }
7670
7671         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
7672                 firmware_features_iomem_addr);
7673         if (rc) {
7674                 dev_err(&ctrl_info->pci_dev->dev,
7675                         "failed to enable firmware features in PQI configuration table\n");
7676                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7677                         if (!pqi_firmware_features[i].supported)
7678                                 continue;
7679                         pqi_firmware_feature_update(ctrl_info,
7680                                 &pqi_firmware_features[i]);
7681                 }
7682                 return;
7683         }
7684
7685         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7686                 if (!pqi_firmware_features[i].supported)
7687                         continue;
7688                 if (pqi_is_firmware_feature_enabled(firmware_features,
7689                         firmware_features_iomem_addr,
7690                         pqi_firmware_features[i].feature_bit)) {
7691                                 pqi_firmware_features[i].enabled = true;
7692                 }
7693                 pqi_firmware_feature_update(ctrl_info,
7694                         &pqi_firmware_features[i]);
7695         }
7696 }
7697
7698 static void pqi_init_firmware_features(void)
7699 {
7700         unsigned int i;
7701
7702         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7703                 pqi_firmware_features[i].supported = false;
7704                 pqi_firmware_features[i].enabled = false;
7705         }
7706 }
7707
7708 static void pqi_process_firmware_features_section(
7709         struct pqi_config_table_section_info *section_info)
7710 {
7711         mutex_lock(&pqi_firmware_features_mutex);
7712         pqi_init_firmware_features();
7713         pqi_process_firmware_features(section_info);
7714         mutex_unlock(&pqi_firmware_features_mutex);
7715 }
7716
7717 /*
7718  * Reset all controller settings that can be initialized during the processing
7719  * of the PQI Configuration Table.
7720  */
7721
7722 static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
7723 {
7724         ctrl_info->heartbeat_counter = NULL;
7725         ctrl_info->soft_reset_status = NULL;
7726         ctrl_info->soft_reset_handshake_supported = false;
7727         ctrl_info->enable_r1_writes = false;
7728         ctrl_info->enable_r5_writes = false;
7729         ctrl_info->enable_r6_writes = false;
7730         ctrl_info->raid_iu_timeout_supported = false;
7731         ctrl_info->tmf_iu_timeout_supported = false;
7732         ctrl_info->unique_wwid_in_report_phys_lun_supported = false;
7733         ctrl_info->firmware_triage_supported = false;
7734         ctrl_info->rpl_extended_format_4_5_supported = false;
7735 }
7736
7737 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
7738 {
7739         u32 table_length;
7740         u32 section_offset;
7741         bool firmware_feature_section_present;
7742         void __iomem *table_iomem_addr;
7743         struct pqi_config_table *config_table;
7744         struct pqi_config_table_section_header *section;
7745         struct pqi_config_table_section_info section_info;
7746         struct pqi_config_table_section_info feature_section_info;
7747
7748         table_length = ctrl_info->config_table_length;
7749         if (table_length == 0)
7750                 return 0;
7751
7752         config_table = kmalloc(table_length, GFP_KERNEL);
7753         if (!config_table) {
7754                 dev_err(&ctrl_info->pci_dev->dev,
7755                         "failed to allocate memory for PQI configuration table\n");
7756                 return -ENOMEM;
7757         }
7758
7759         /*
7760          * Copy the config table contents from I/O memory space into the
7761          * temporary buffer.
7762          */
7763         table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
7764         memcpy_fromio(config_table, table_iomem_addr, table_length);
7765
7766         firmware_feature_section_present = false;
7767         section_info.ctrl_info = ctrl_info;
7768         section_offset = get_unaligned_le32(&config_table->first_section_offset);
7769
7770         while (section_offset) {
7771                 section = (void *)config_table + section_offset;
7772
7773                 section_info.section = section;
7774                 section_info.section_offset = section_offset;
7775                 section_info.section_iomem_addr = table_iomem_addr + section_offset;
7776
7777                 switch (get_unaligned_le16(&section->section_id)) {
7778                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
7779                         firmware_feature_section_present = true;
7780                         feature_section_info = section_info;
7781                         break;
7782                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
7783                         if (pqi_disable_heartbeat)
7784                                 dev_warn(&ctrl_info->pci_dev->dev,
7785                                 "heartbeat disabled by module parameter\n");
7786                         else
7787                                 ctrl_info->heartbeat_counter =
7788                                         table_iomem_addr +
7789                                         section_offset +
7790                                         offsetof(struct pqi_config_table_heartbeat,
7791                                                 heartbeat_counter);
7792                         break;
7793                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
7794                         ctrl_info->soft_reset_status =
7795                                 table_iomem_addr +
7796                                 section_offset +
7797                                 offsetof(struct pqi_config_table_soft_reset,
7798                                         soft_reset_status);
7799                         break;
7800                 }
7801
7802                 section_offset = get_unaligned_le16(&section->next_section_offset);
7803         }
7804
7805         /*
7806          * We process the firmware feature section after all other sections
7807          * have been processed so that the feature bit callbacks can take
7808          * into account the settings configured by other sections.
7809          */
7810         if (firmware_feature_section_present)
7811                 pqi_process_firmware_features_section(&feature_section_info);
7812
7813         kfree(config_table);
7814
7815         return 0;
7816 }
7817
7818 /* Switches the controller from PQI mode back into SIS mode. */
7819
7820 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
7821 {
7822         int rc;
7823
7824         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
7825         rc = pqi_reset(ctrl_info);
7826         if (rc)
7827                 return rc;
7828         rc = sis_reenable_sis_mode(ctrl_info);
7829         if (rc) {
7830                 dev_err(&ctrl_info->pci_dev->dev,
7831                         "re-enabling SIS mode failed with error %d\n", rc);
7832                 return rc;
7833         }
7834         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7835
7836         return 0;
7837 }
7838
7839 /*
7840  * If the controller isn't already in SIS mode, this function forces it into
7841  * SIS mode.
7842  */
7843
7844 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
7845 {
7846         if (!sis_is_firmware_running(ctrl_info))
7847                 return -ENXIO;
7848
7849         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
7850                 return 0;
7851
7852         if (sis_is_kernel_up(ctrl_info)) {
7853                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7854                 return 0;
7855         }
7856
7857         return pqi_revert_to_sis_mode(ctrl_info);
7858 }
7859
7860 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
7861 {
7862         int rc;
7863         u32 product_id;
7864
7865         if (reset_devices) {
7866                 if (pqi_is_fw_triage_supported(ctrl_info)) {
7867                         rc = sis_wait_for_fw_triage_completion(ctrl_info);
7868                         if (rc)
7869                                 return rc;
7870                 }
7871                 sis_soft_reset(ctrl_info);
7872                 msleep(PQI_POST_RESET_DELAY_SECS * PQI_HZ);
7873         } else {
7874                 rc = pqi_force_sis_mode(ctrl_info);
7875                 if (rc)
7876                         return rc;
7877         }
7878
7879         /*
7880          * Wait until the controller is ready to start accepting SIS
7881          * commands.
7882          */
7883         rc = sis_wait_for_ctrl_ready(ctrl_info);
7884         if (rc)
7885                 return rc;
7886
7887         /*
7888          * Get the controller properties.  This allows us to determine
7889          * whether or not it supports PQI mode.
7890          */
7891         rc = sis_get_ctrl_properties(ctrl_info);
7892         if (rc) {
7893                 dev_err(&ctrl_info->pci_dev->dev,
7894                         "error obtaining controller properties\n");
7895                 return rc;
7896         }
7897
7898         rc = sis_get_pqi_capabilities(ctrl_info);
7899         if (rc) {
7900                 dev_err(&ctrl_info->pci_dev->dev,
7901                         "error obtaining controller capabilities\n");
7902                 return rc;
7903         }
7904
7905         product_id = sis_get_product_id(ctrl_info);
7906         ctrl_info->product_id = (u8)product_id;
7907         ctrl_info->product_revision = (u8)(product_id >> 8);
7908
7909         if (reset_devices) {
7910                 if (ctrl_info->max_outstanding_requests >
7911                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
7912                                 ctrl_info->max_outstanding_requests =
7913                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
7914         } else {
7915                 if (ctrl_info->max_outstanding_requests >
7916                         PQI_MAX_OUTSTANDING_REQUESTS)
7917                                 ctrl_info->max_outstanding_requests =
7918                                         PQI_MAX_OUTSTANDING_REQUESTS;
7919         }
7920
7921         pqi_calculate_io_resources(ctrl_info);
7922
7923         rc = pqi_alloc_error_buffer(ctrl_info);
7924         if (rc) {
7925                 dev_err(&ctrl_info->pci_dev->dev,
7926                         "failed to allocate PQI error buffer\n");
7927                 return rc;
7928         }
7929
7930         /*
7931          * If the function we are about to call succeeds, the
7932          * controller will transition from legacy SIS mode
7933          * into PQI mode.
7934          */
7935         rc = sis_init_base_struct_addr(ctrl_info);
7936         if (rc) {
7937                 dev_err(&ctrl_info->pci_dev->dev,
7938                         "error initializing PQI mode\n");
7939                 return rc;
7940         }
7941
7942         /* Wait for the controller to complete the SIS -> PQI transition. */
7943         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7944         if (rc) {
7945                 dev_err(&ctrl_info->pci_dev->dev,
7946                         "transition to PQI mode failed\n");
7947                 return rc;
7948         }
7949
7950         /* From here on, we are running in PQI mode. */
7951         ctrl_info->pqi_mode_enabled = true;
7952         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7953
7954         rc = pqi_alloc_admin_queues(ctrl_info);
7955         if (rc) {
7956                 dev_err(&ctrl_info->pci_dev->dev,
7957                         "failed to allocate admin queues\n");
7958                 return rc;
7959         }
7960
7961         rc = pqi_create_admin_queues(ctrl_info);
7962         if (rc) {
7963                 dev_err(&ctrl_info->pci_dev->dev,
7964                         "error creating admin queues\n");
7965                 return rc;
7966         }
7967
7968         rc = pqi_report_device_capability(ctrl_info);
7969         if (rc) {
7970                 dev_err(&ctrl_info->pci_dev->dev,
7971                         "obtaining device capability failed\n");
7972                 return rc;
7973         }
7974
7975         rc = pqi_validate_device_capability(ctrl_info);
7976         if (rc)
7977                 return rc;
7978
7979         pqi_calculate_queue_resources(ctrl_info);
7980
7981         rc = pqi_enable_msix_interrupts(ctrl_info);
7982         if (rc)
7983                 return rc;
7984
7985         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
7986                 ctrl_info->max_msix_vectors =
7987                         ctrl_info->num_msix_vectors_enabled;
7988                 pqi_calculate_queue_resources(ctrl_info);
7989         }
7990
7991         rc = pqi_alloc_io_resources(ctrl_info);
7992         if (rc)
7993                 return rc;
7994
7995         rc = pqi_alloc_operational_queues(ctrl_info);
7996         if (rc) {
7997                 dev_err(&ctrl_info->pci_dev->dev,
7998                         "failed to allocate operational queues\n");
7999                 return rc;
8000         }
8001
8002         pqi_init_operational_queues(ctrl_info);
8003
8004         rc = pqi_create_queues(ctrl_info);
8005         if (rc)
8006                 return rc;
8007
8008         rc = pqi_request_irqs(ctrl_info);
8009         if (rc)
8010                 return rc;
8011
8012         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8013
8014         ctrl_info->controller_online = true;
8015
8016         rc = pqi_process_config_table(ctrl_info);
8017         if (rc)
8018                 return rc;
8019
8020         pqi_start_heartbeat_timer(ctrl_info);
8021
8022         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8023                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8024                 if (rc) { /* Supported features not returned correctly. */
8025                         dev_err(&ctrl_info->pci_dev->dev,
8026                                 "error obtaining advanced RAID bypass configuration\n");
8027                         return rc;
8028                 }
8029                 ctrl_info->ciss_report_log_flags |=
8030                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8031         }
8032
8033         rc = pqi_enable_events(ctrl_info);
8034         if (rc) {
8035                 dev_err(&ctrl_info->pci_dev->dev,
8036                         "error enabling events\n");
8037                 return rc;
8038         }
8039
8040         /* Register with the SCSI subsystem. */
8041         rc = pqi_register_scsi(ctrl_info);
8042         if (rc)
8043                 return rc;
8044
8045         rc = pqi_get_ctrl_product_details(ctrl_info);
8046         if (rc) {
8047                 dev_err(&ctrl_info->pci_dev->dev,
8048                         "error obtaining product details\n");
8049                 return rc;
8050         }
8051
8052         rc = pqi_get_ctrl_serial_number(ctrl_info);
8053         if (rc) {
8054                 dev_err(&ctrl_info->pci_dev->dev,
8055                         "error obtaining ctrl serial number\n");
8056                 return rc;
8057         }
8058
8059         rc = pqi_set_diag_rescan(ctrl_info);
8060         if (rc) {
8061                 dev_err(&ctrl_info->pci_dev->dev,
8062                         "error enabling multi-lun rescan\n");
8063                 return rc;
8064         }
8065
8066         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8067         if (rc) {
8068                 dev_err(&ctrl_info->pci_dev->dev,
8069                         "error updating host wellness\n");
8070                 return rc;
8071         }
8072
8073         pqi_schedule_update_time_worker(ctrl_info);
8074
8075         pqi_scan_scsi_devices(ctrl_info);
8076
8077         return 0;
8078 }
8079
8080 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
8081 {
8082         unsigned int i;
8083         struct pqi_admin_queues *admin_queues;
8084         struct pqi_event_queue *event_queue;
8085
8086         admin_queues = &ctrl_info->admin_queues;
8087         admin_queues->iq_pi_copy = 0;
8088         admin_queues->oq_ci_copy = 0;
8089         writel(0, admin_queues->oq_pi);
8090
8091         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
8092                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
8093                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
8094                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
8095
8096                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
8097                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
8098                 writel(0, ctrl_info->queue_groups[i].oq_pi);
8099         }
8100
8101         event_queue = &ctrl_info->event_queue;
8102         writel(0, event_queue->oq_pi);
8103         event_queue->oq_ci_copy = 0;
8104 }
8105
8106 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
8107 {
8108         int rc;
8109
8110         rc = pqi_force_sis_mode(ctrl_info);
8111         if (rc)
8112                 return rc;
8113
8114         /*
8115          * Wait until the controller is ready to start accepting SIS
8116          * commands.
8117          */
8118         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
8119         if (rc)
8120                 return rc;
8121
8122         /*
8123          * Get the controller properties.  This allows us to determine
8124          * whether or not it supports PQI mode.
8125          */
8126         rc = sis_get_ctrl_properties(ctrl_info);
8127         if (rc) {
8128                 dev_err(&ctrl_info->pci_dev->dev,
8129                         "error obtaining controller properties\n");
8130                 return rc;
8131         }
8132
8133         rc = sis_get_pqi_capabilities(ctrl_info);
8134         if (rc) {
8135                 dev_err(&ctrl_info->pci_dev->dev,
8136                         "error obtaining controller capabilities\n");
8137                 return rc;
8138         }
8139
8140         /*
8141          * If the function we are about to call succeeds, the
8142          * controller will transition from legacy SIS mode
8143          * into PQI mode.
8144          */
8145         rc = sis_init_base_struct_addr(ctrl_info);
8146         if (rc) {
8147                 dev_err(&ctrl_info->pci_dev->dev,
8148                         "error initializing PQI mode\n");
8149                 return rc;
8150         }
8151
8152         /* Wait for the controller to complete the SIS -> PQI transition. */
8153         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
8154         if (rc) {
8155                 dev_err(&ctrl_info->pci_dev->dev,
8156                         "transition to PQI mode failed\n");
8157                 return rc;
8158         }
8159
8160         /* From here on, we are running in PQI mode. */
8161         ctrl_info->pqi_mode_enabled = true;
8162         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
8163
8164         pqi_reinit_queues(ctrl_info);
8165
8166         rc = pqi_create_admin_queues(ctrl_info);
8167         if (rc) {
8168                 dev_err(&ctrl_info->pci_dev->dev,
8169                         "error creating admin queues\n");
8170                 return rc;
8171         }
8172
8173         rc = pqi_create_queues(ctrl_info);
8174         if (rc)
8175                 return rc;
8176
8177         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
8178
8179         ctrl_info->controller_online = true;
8180         pqi_ctrl_unblock_requests(ctrl_info);
8181
8182         pqi_ctrl_reset_config(ctrl_info);
8183
8184         rc = pqi_process_config_table(ctrl_info);
8185         if (rc)
8186                 return rc;
8187
8188         pqi_start_heartbeat_timer(ctrl_info);
8189
8190         if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
8191                 rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
8192                 if (rc) {
8193                         dev_err(&ctrl_info->pci_dev->dev,
8194                                 "error obtaining advanced RAID bypass configuration\n");
8195                         return rc;
8196                 }
8197                 ctrl_info->ciss_report_log_flags |=
8198                         CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
8199         }
8200
8201         rc = pqi_enable_events(ctrl_info);
8202         if (rc) {
8203                 dev_err(&ctrl_info->pci_dev->dev,
8204                         "error enabling events\n");
8205                 return rc;
8206         }
8207
8208         rc = pqi_get_ctrl_product_details(ctrl_info);
8209         if (rc) {
8210                 dev_err(&ctrl_info->pci_dev->dev,
8211                         "error obtaining product details\n");
8212                 return rc;
8213         }
8214
8215         rc = pqi_set_diag_rescan(ctrl_info);
8216         if (rc) {
8217                 dev_err(&ctrl_info->pci_dev->dev,
8218                         "error enabling multi-lun rescan\n");
8219                 return rc;
8220         }
8221
8222         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
8223         if (rc) {
8224                 dev_err(&ctrl_info->pci_dev->dev,
8225                         "error updating host wellness\n");
8226                 return rc;
8227         }
8228
8229         if (pqi_ofa_in_progress(ctrl_info))
8230                 pqi_ctrl_unblock_scan(ctrl_info);
8231
8232         pqi_scan_scsi_devices(ctrl_info);
8233
8234         return 0;
8235 }
8236
8237 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
8238 {
8239         int rc;
8240
8241         rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
8242                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
8243
8244         return pcibios_err_to_errno(rc);
8245 }
8246
8247 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
8248 {
8249         int rc;
8250         u64 mask;
8251
8252         rc = pci_enable_device(ctrl_info->pci_dev);
8253         if (rc) {
8254                 dev_err(&ctrl_info->pci_dev->dev,
8255                         "failed to enable PCI device\n");
8256                 return rc;
8257         }
8258
8259         if (sizeof(dma_addr_t) > 4)
8260                 mask = DMA_BIT_MASK(64);
8261         else
8262                 mask = DMA_BIT_MASK(32);
8263
8264         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
8265         if (rc) {
8266                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
8267                 goto disable_device;
8268         }
8269
8270         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
8271         if (rc) {
8272                 dev_err(&ctrl_info->pci_dev->dev,
8273                         "failed to obtain PCI resources\n");
8274                 goto disable_device;
8275         }
8276
8277         ctrl_info->iomem_base = ioremap(pci_resource_start(
8278                 ctrl_info->pci_dev, 0),
8279                 sizeof(struct pqi_ctrl_registers));
8280         if (!ctrl_info->iomem_base) {
8281                 dev_err(&ctrl_info->pci_dev->dev,
8282                         "failed to map memory for controller registers\n");
8283                 rc = -ENOMEM;
8284                 goto release_regions;
8285         }
8286
8287 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
8288
8289         /* Increase the PCIe completion timeout. */
8290         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
8291                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
8292         if (rc) {
8293                 dev_err(&ctrl_info->pci_dev->dev,
8294                         "failed to set PCIe completion timeout\n");
8295                 goto release_regions;
8296         }
8297
8298         /* Enable bus mastering. */
8299         pci_set_master(ctrl_info->pci_dev);
8300
8301         ctrl_info->registers = ctrl_info->iomem_base;
8302         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
8303
8304         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
8305
8306         return 0;
8307
8308 release_regions:
8309         pci_release_regions(ctrl_info->pci_dev);
8310 disable_device:
8311         pci_disable_device(ctrl_info->pci_dev);
8312
8313         return rc;
8314 }
8315
8316 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
8317 {
8318         iounmap(ctrl_info->iomem_base);
8319         pci_release_regions(ctrl_info->pci_dev);
8320         if (pci_is_enabled(ctrl_info->pci_dev))
8321                 pci_disable_device(ctrl_info->pci_dev);
8322         pci_set_drvdata(ctrl_info->pci_dev, NULL);
8323 }
8324
8325 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
8326 {
8327         struct pqi_ctrl_info *ctrl_info;
8328
8329         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
8330                         GFP_KERNEL, numa_node);
8331         if (!ctrl_info)
8332                 return NULL;
8333
8334         mutex_init(&ctrl_info->scan_mutex);
8335         mutex_init(&ctrl_info->lun_reset_mutex);
8336         mutex_init(&ctrl_info->ofa_mutex);
8337
8338         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
8339         spin_lock_init(&ctrl_info->scsi_device_list_lock);
8340
8341         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
8342         atomic_set(&ctrl_info->num_interrupts, 0);
8343
8344         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
8345         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
8346
8347         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
8348         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
8349
8350         INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
8351         INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
8352
8353         sema_init(&ctrl_info->sync_request_sem,
8354                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
8355         init_waitqueue_head(&ctrl_info->block_requests_wait);
8356
8357         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
8358         ctrl_info->irq_mode = IRQ_MODE_NONE;
8359         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
8360
8361         ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
8362         ctrl_info->max_transfer_encrypted_sas_sata =
8363                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
8364         ctrl_info->max_transfer_encrypted_nvme =
8365                 PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
8366         ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
8367         ctrl_info->max_write_raid_1_10_2drive = ~0;
8368         ctrl_info->max_write_raid_1_10_3drive = ~0;
8369
8370         return ctrl_info;
8371 }
8372
8373 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
8374 {
8375         kfree(ctrl_info);
8376 }
8377
8378 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
8379 {
8380         pqi_free_irqs(ctrl_info);
8381         pqi_disable_msix_interrupts(ctrl_info);
8382 }
8383
8384 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
8385 {
8386         pqi_stop_heartbeat_timer(ctrl_info);
8387         pqi_free_interrupts(ctrl_info);
8388         if (ctrl_info->queue_memory_base)
8389                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8390                         ctrl_info->queue_memory_length,
8391                         ctrl_info->queue_memory_base,
8392                         ctrl_info->queue_memory_base_dma_handle);
8393         if (ctrl_info->admin_queue_memory_base)
8394                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8395                         ctrl_info->admin_queue_memory_length,
8396                         ctrl_info->admin_queue_memory_base,
8397                         ctrl_info->admin_queue_memory_base_dma_handle);
8398         pqi_free_all_io_requests(ctrl_info);
8399         if (ctrl_info->error_buffer)
8400                 dma_free_coherent(&ctrl_info->pci_dev->dev,
8401                         ctrl_info->error_buffer_length,
8402                         ctrl_info->error_buffer,
8403                         ctrl_info->error_buffer_dma_handle);
8404         if (ctrl_info->iomem_base)
8405                 pqi_cleanup_pci_init(ctrl_info);
8406         pqi_free_ctrl_info(ctrl_info);
8407 }
8408
8409 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
8410 {
8411         pqi_cancel_rescan_worker(ctrl_info);
8412         pqi_cancel_update_time_worker(ctrl_info);
8413         pqi_remove_all_scsi_devices(ctrl_info);
8414         pqi_unregister_scsi(ctrl_info);
8415         if (ctrl_info->pqi_mode_enabled)
8416                 pqi_revert_to_sis_mode(ctrl_info);
8417         pqi_free_ctrl_resources(ctrl_info);
8418 }
8419
8420 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
8421 {
8422         pqi_ctrl_block_scan(ctrl_info);
8423         pqi_scsi_block_requests(ctrl_info);
8424         pqi_ctrl_block_device_reset(ctrl_info);
8425         pqi_ctrl_block_requests(ctrl_info);
8426         pqi_ctrl_wait_until_quiesced(ctrl_info);
8427         pqi_stop_heartbeat_timer(ctrl_info);
8428 }
8429
8430 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
8431 {
8432         pqi_start_heartbeat_timer(ctrl_info);
8433         pqi_ctrl_unblock_requests(ctrl_info);
8434         pqi_ctrl_unblock_device_reset(ctrl_info);
8435         pqi_scsi_unblock_requests(ctrl_info);
8436         pqi_ctrl_unblock_scan(ctrl_info);
8437 }
8438
8439 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
8440 {
8441         int i;
8442         u32 sg_count;
8443         struct device *dev;
8444         struct pqi_ofa_memory *ofap;
8445         struct pqi_sg_descriptor *mem_descriptor;
8446         dma_addr_t dma_handle;
8447
8448         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8449
8450         sg_count = DIV_ROUND_UP(total_size, chunk_size);
8451         if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
8452                 goto out;
8453
8454         ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
8455         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
8456                 goto out;
8457
8458         dev = &ctrl_info->pci_dev->dev;
8459
8460         for (i = 0; i < sg_count; i++) {
8461                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
8462                         dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
8463                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
8464                         goto out_free_chunks;
8465                 mem_descriptor = &ofap->sg_descriptor[i];
8466                 put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
8467                 put_unaligned_le32(chunk_size, &mem_descriptor->length);
8468         }
8469
8470         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
8471         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
8472         put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
8473
8474         return 0;
8475
8476 out_free_chunks:
8477         while (--i >= 0) {
8478                 mem_descriptor = &ofap->sg_descriptor[i];
8479                 dma_free_coherent(dev, chunk_size,
8480                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8481                         get_unaligned_le64(&mem_descriptor->address));
8482         }
8483         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8484
8485 out:
8486         return -ENOMEM;
8487 }
8488
8489 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
8490 {
8491         u32 total_size;
8492         u32 chunk_size;
8493         u32 min_chunk_size;
8494
8495         if (ctrl_info->ofa_bytes_requested == 0)
8496                 return 0;
8497
8498         total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
8499         min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
8500         min_chunk_size = PAGE_ALIGN(min_chunk_size);
8501
8502         for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
8503                 if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
8504                         return 0;
8505                 chunk_size /= 2;
8506                 chunk_size = PAGE_ALIGN(chunk_size);
8507         }
8508
8509         return -ENOMEM;
8510 }
8511
8512 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
8513 {
8514         struct device *dev;
8515         struct pqi_ofa_memory *ofap;
8516
8517         dev = &ctrl_info->pci_dev->dev;
8518
8519         ofap = dma_alloc_coherent(dev, sizeof(*ofap),
8520                 &ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
8521         if (!ofap)
8522                 return;
8523
8524         ctrl_info->pqi_ofa_mem_virt_addr = ofap;
8525
8526         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
8527                 dev_err(dev,
8528                         "failed to allocate host buffer for Online Firmware Activation\n");
8529                 dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
8530                 ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8531                 return;
8532         }
8533
8534         put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
8535         memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
8536 }
8537
8538 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
8539 {
8540         unsigned int i;
8541         struct device *dev;
8542         struct pqi_ofa_memory *ofap;
8543         struct pqi_sg_descriptor *mem_descriptor;
8544         unsigned int num_memory_descriptors;
8545
8546         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8547         if (!ofap)
8548                 return;
8549
8550         dev = &ctrl_info->pci_dev->dev;
8551
8552         if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
8553                 goto out;
8554
8555         mem_descriptor = ofap->sg_descriptor;
8556         num_memory_descriptors =
8557                 get_unaligned_le16(&ofap->num_memory_descriptors);
8558
8559         for (i = 0; i < num_memory_descriptors; i++) {
8560                 dma_free_coherent(dev,
8561                         get_unaligned_le32(&mem_descriptor[i].length),
8562                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
8563                         get_unaligned_le64(&mem_descriptor[i].address));
8564         }
8565         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
8566
8567 out:
8568         dma_free_coherent(dev, sizeof(*ofap), ofap,
8569                 ctrl_info->pqi_ofa_mem_dma_handle);
8570         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
8571 }
8572
8573 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
8574 {
8575         u32 buffer_length;
8576         struct pqi_vendor_general_request request;
8577         struct pqi_ofa_memory *ofap;
8578
8579         memset(&request, 0, sizeof(request));
8580
8581         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
8582         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
8583                 &request.header.iu_length);
8584         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
8585                 &request.function_code);
8586
8587         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
8588
8589         if (ofap) {
8590                 buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
8591                         get_unaligned_le16(&ofap->num_memory_descriptors) *
8592                         sizeof(struct pqi_sg_descriptor);
8593
8594                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
8595                         &request.data.ofa_memory_allocation.buffer_address);
8596                 put_unaligned_le32(buffer_length,
8597                         &request.data.ofa_memory_allocation.buffer_length);
8598         }
8599
8600         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
8601 }
8602
8603 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
8604 {
8605         ssleep(delay_secs);
8606
8607         return pqi_ctrl_init_resume(ctrl_info);
8608 }
8609
8610 static void pqi_perform_lockup_action(void)
8611 {
8612         switch (pqi_lockup_action) {
8613         case PANIC:
8614                 panic("FATAL: Smart Family Controller lockup detected");
8615                 break;
8616         case REBOOT:
8617                 emergency_restart();
8618                 break;
8619         case NONE:
8620         default:
8621                 break;
8622         }
8623 }
8624
8625 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
8626         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
8627         .status = SAM_STAT_CHECK_CONDITION,
8628 };
8629
8630 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
8631 {
8632         unsigned int i;
8633         struct pqi_io_request *io_request;
8634         struct scsi_cmnd *scmd;
8635         struct scsi_device *sdev;
8636
8637         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8638                 io_request = &ctrl_info->io_request_pool[i];
8639                 if (atomic_read(&io_request->refcount) == 0)
8640                         continue;
8641
8642                 scmd = io_request->scmd;
8643                 if (scmd) {
8644                         sdev = scmd->device;
8645                         if (!sdev || !scsi_device_online(sdev)) {
8646                                 pqi_free_io_request(io_request);
8647                                 continue;
8648                         } else {
8649                                 set_host_byte(scmd, DID_NO_CONNECT);
8650                         }
8651                 } else {
8652                         io_request->status = -ENXIO;
8653                         io_request->error_info =
8654                                 &pqi_ctrl_offline_raid_error_info;
8655                 }
8656
8657                 io_request->io_complete_callback(io_request,
8658                         io_request->context);
8659         }
8660 }
8661
8662 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
8663 {
8664         pqi_perform_lockup_action();
8665         pqi_stop_heartbeat_timer(ctrl_info);
8666         pqi_free_interrupts(ctrl_info);
8667         pqi_cancel_rescan_worker(ctrl_info);
8668         pqi_cancel_update_time_worker(ctrl_info);
8669         pqi_ctrl_wait_until_quiesced(ctrl_info);
8670         pqi_fail_all_outstanding_requests(ctrl_info);
8671         pqi_ctrl_unblock_requests(ctrl_info);
8672 }
8673
8674 static void pqi_ctrl_offline_worker(struct work_struct *work)
8675 {
8676         struct pqi_ctrl_info *ctrl_info;
8677
8678         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
8679         pqi_take_ctrl_offline_deferred(ctrl_info);
8680 }
8681
8682 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
8683         enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
8684 {
8685         if (!ctrl_info->controller_online)
8686                 return;
8687
8688         ctrl_info->controller_online = false;
8689         ctrl_info->pqi_mode_enabled = false;
8690         pqi_ctrl_block_requests(ctrl_info);
8691         if (!pqi_disable_ctrl_shutdown)
8692                 sis_shutdown_ctrl(ctrl_info, ctrl_shutdown_reason);
8693         pci_disable_device(ctrl_info->pci_dev);
8694         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
8695         schedule_work(&ctrl_info->ctrl_offline_work);
8696 }
8697
8698 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
8699         const struct pci_device_id *id)
8700 {
8701         char *ctrl_description;
8702
8703         if (id->driver_data)
8704                 ctrl_description = (char *)id->driver_data;
8705         else
8706                 ctrl_description = "Microchip Smart Family Controller";
8707
8708         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
8709 }
8710
8711 static int pqi_pci_probe(struct pci_dev *pci_dev,
8712         const struct pci_device_id *id)
8713 {
8714         int rc;
8715         int node, cp_node;
8716         struct pqi_ctrl_info *ctrl_info;
8717
8718         pqi_print_ctrl_info(pci_dev, id);
8719
8720         if (pqi_disable_device_id_wildcards &&
8721                 id->subvendor == PCI_ANY_ID &&
8722                 id->subdevice == PCI_ANY_ID) {
8723                 dev_warn(&pci_dev->dev,
8724                         "controller not probed because device ID wildcards are disabled\n");
8725                 return -ENODEV;
8726         }
8727
8728         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
8729                 dev_warn(&pci_dev->dev,
8730                         "controller device ID matched using wildcards\n");
8731
8732         node = dev_to_node(&pci_dev->dev);
8733         if (node == NUMA_NO_NODE) {
8734                 cp_node = cpu_to_node(0);
8735                 if (cp_node == NUMA_NO_NODE)
8736                         cp_node = 0;
8737                 set_dev_node(&pci_dev->dev, cp_node);
8738         }
8739
8740         ctrl_info = pqi_alloc_ctrl_info(node);
8741         if (!ctrl_info) {
8742                 dev_err(&pci_dev->dev,
8743                         "failed to allocate controller info block\n");
8744                 return -ENOMEM;
8745         }
8746
8747         ctrl_info->pci_dev = pci_dev;
8748
8749         rc = pqi_pci_init(ctrl_info);
8750         if (rc)
8751                 goto error;
8752
8753         rc = pqi_ctrl_init(ctrl_info);
8754         if (rc)
8755                 goto error;
8756
8757         return 0;
8758
8759 error:
8760         pqi_remove_ctrl(ctrl_info);
8761
8762         return rc;
8763 }
8764
8765 static void pqi_pci_remove(struct pci_dev *pci_dev)
8766 {
8767         struct pqi_ctrl_info *ctrl_info;
8768
8769         ctrl_info = pci_get_drvdata(pci_dev);
8770         if (!ctrl_info)
8771                 return;
8772
8773         pqi_remove_ctrl(ctrl_info);
8774 }
8775
8776 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
8777 {
8778         unsigned int i;
8779         struct pqi_io_request *io_request;
8780         struct scsi_cmnd *scmd;
8781
8782         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8783                 io_request = &ctrl_info->io_request_pool[i];
8784                 if (atomic_read(&io_request->refcount) == 0)
8785                         continue;
8786                 scmd = io_request->scmd;
8787                 WARN_ON(scmd != NULL); /* IO command from SML */
8788                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
8789         }
8790 }
8791
8792 static void pqi_shutdown(struct pci_dev *pci_dev)
8793 {
8794         int rc;
8795         struct pqi_ctrl_info *ctrl_info;
8796
8797         ctrl_info = pci_get_drvdata(pci_dev);
8798         if (!ctrl_info) {
8799                 dev_err(&pci_dev->dev,
8800                         "cache could not be flushed\n");
8801                 return;
8802         }
8803
8804         pqi_wait_until_ofa_finished(ctrl_info);
8805
8806         pqi_scsi_block_requests(ctrl_info);
8807         pqi_ctrl_block_device_reset(ctrl_info);
8808         pqi_ctrl_block_requests(ctrl_info);
8809         pqi_ctrl_wait_until_quiesced(ctrl_info);
8810
8811         /*
8812          * Write all data in the controller's battery-backed cache to
8813          * storage.
8814          */
8815         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
8816         if (rc)
8817                 dev_err(&pci_dev->dev,
8818                         "unable to flush controller cache\n");
8819
8820         pqi_crash_if_pending_command(ctrl_info);
8821         pqi_reset(ctrl_info);
8822 }
8823
8824 static void pqi_process_lockup_action_param(void)
8825 {
8826         unsigned int i;
8827
8828         if (!pqi_lockup_action_param)
8829                 return;
8830
8831         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
8832                 if (strcmp(pqi_lockup_action_param,
8833                         pqi_lockup_actions[i].name) == 0) {
8834                         pqi_lockup_action = pqi_lockup_actions[i].action;
8835                         return;
8836                 }
8837         }
8838
8839         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
8840                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
8841 }
8842
8843 static void pqi_process_module_params(void)
8844 {
8845         pqi_process_lockup_action_param();
8846 }
8847
8848 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
8849 {
8850         struct pqi_ctrl_info *ctrl_info;
8851
8852         ctrl_info = pci_get_drvdata(pci_dev);
8853
8854         pqi_wait_until_ofa_finished(ctrl_info);
8855
8856         pqi_ctrl_block_scan(ctrl_info);
8857         pqi_scsi_block_requests(ctrl_info);
8858         pqi_ctrl_block_device_reset(ctrl_info);
8859         pqi_ctrl_block_requests(ctrl_info);
8860         pqi_ctrl_wait_until_quiesced(ctrl_info);
8861         pqi_flush_cache(ctrl_info, SUSPEND);
8862         pqi_stop_heartbeat_timer(ctrl_info);
8863
8864         pqi_crash_if_pending_command(ctrl_info);
8865
8866         if (state.event == PM_EVENT_FREEZE)
8867                 return 0;
8868
8869         pci_save_state(pci_dev);
8870         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
8871
8872         ctrl_info->controller_online = false;
8873         ctrl_info->pqi_mode_enabled = false;
8874
8875         return 0;
8876 }
8877
8878 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
8879 {
8880         int rc;
8881         struct pqi_ctrl_info *ctrl_info;
8882
8883         ctrl_info = pci_get_drvdata(pci_dev);
8884
8885         if (pci_dev->current_state != PCI_D0) {
8886                 ctrl_info->max_hw_queue_index = 0;
8887                 pqi_free_interrupts(ctrl_info);
8888                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
8889                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
8890                         IRQF_SHARED, DRIVER_NAME_SHORT,
8891                         &ctrl_info->queue_groups[0]);
8892                 if (rc) {
8893                         dev_err(&ctrl_info->pci_dev->dev,
8894                                 "irq %u init failed with error %d\n",
8895                                 pci_dev->irq, rc);
8896                         return rc;
8897                 }
8898                 pqi_ctrl_unblock_device_reset(ctrl_info);
8899                 pqi_ctrl_unblock_requests(ctrl_info);
8900                 pqi_scsi_unblock_requests(ctrl_info);
8901                 pqi_ctrl_unblock_scan(ctrl_info);
8902                 return 0;
8903         }
8904
8905         pci_set_power_state(pci_dev, PCI_D0);
8906         pci_restore_state(pci_dev);
8907
8908         pqi_ctrl_unblock_device_reset(ctrl_info);
8909         pqi_ctrl_unblock_requests(ctrl_info);
8910         pqi_scsi_unblock_requests(ctrl_info);
8911         pqi_ctrl_unblock_scan(ctrl_info);
8912
8913         return pqi_ctrl_init_resume(ctrl_info);
8914 }
8915
8916 /* Define the PCI IDs for the controllers that we support. */
8917 static const struct pci_device_id pqi_pci_id_table[] = {
8918         {
8919                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8920                                0x105b, 0x1211)
8921         },
8922         {
8923                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8924                                0x105b, 0x1321)
8925         },
8926         {
8927                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8928                                0x152d, 0x8a22)
8929         },
8930         {
8931                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8932                                0x152d, 0x8a23)
8933         },
8934         {
8935                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8936                                0x152d, 0x8a24)
8937         },
8938         {
8939                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8940                                0x152d, 0x8a36)
8941         },
8942         {
8943                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8944                                0x152d, 0x8a37)
8945         },
8946         {
8947                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8948                                0x193d, 0x8460)
8949         },
8950         {
8951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8952                                0x193d, 0x1104)
8953         },
8954         {
8955                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8956                                0x193d, 0x1105)
8957         },
8958         {
8959                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8960                                0x193d, 0x1106)
8961         },
8962         {
8963                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8964                                0x193d, 0x1107)
8965         },
8966         {
8967                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8968                                0x193d, 0x1108)
8969         },
8970         {
8971                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8972                                0x193d, 0x1109)
8973         },
8974         {
8975                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8976                                0x193d, 0x8460)
8977         },
8978         {
8979                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8980                                0x193d, 0x8461)
8981         },
8982         {
8983                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8984                                0x193d, 0xc460)
8985         },
8986         {
8987                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8988                                0x193d, 0xc461)
8989         },
8990         {
8991                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8992                                0x193d, 0xf460)
8993         },
8994         {
8995                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8996                                0x193d, 0xf461)
8997         },
8998         {
8999                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9000                                0x1bd4, 0x0045)
9001         },
9002         {
9003                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9004                                0x1bd4, 0x0046)
9005         },
9006         {
9007                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9008                                0x1bd4, 0x0047)
9009         },
9010         {
9011                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9012                                0x1bd4, 0x0048)
9013         },
9014         {
9015                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9016                                0x1bd4, 0x004a)
9017         },
9018         {
9019                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9020                                0x1bd4, 0x004b)
9021         },
9022         {
9023                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9024                                0x1bd4, 0x004c)
9025         },
9026         {
9027                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9028                                0x1bd4, 0x004f)
9029         },
9030         {
9031                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9032                                0x1bd4, 0x0051)
9033         },
9034         {
9035                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9036                                0x1bd4, 0x0052)
9037         },
9038         {
9039                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9040                                0x1bd4, 0x0053)
9041         },
9042         {
9043                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9044                                0x1bd4, 0x0054)
9045         },
9046         {
9047                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9048                                0x19e5, 0xd227)
9049         },
9050         {
9051                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9052                                0x19e5, 0xd228)
9053         },
9054         {
9055                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9056                                0x19e5, 0xd229)
9057         },
9058         {
9059                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9060                                0x19e5, 0xd22a)
9061         },
9062         {
9063                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9064                                0x19e5, 0xd22b)
9065         },
9066         {
9067                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9068                                0x19e5, 0xd22c)
9069         },
9070         {
9071                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9072                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
9073         },
9074         {
9075                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9076                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
9077         },
9078         {
9079                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9080                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
9081         },
9082         {
9083                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9084                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
9085         },
9086         {
9087                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9088                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
9089         },
9090         {
9091                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9092                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
9093         },
9094         {
9095                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9096                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
9097         },
9098         {
9099                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9100                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
9101         },
9102         {
9103                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9104                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
9105         },
9106         {
9107                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9108                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
9109         },
9110         {
9111                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9112                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
9113         },
9114         {
9115                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9116                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
9117         },
9118         {
9119                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9120                                PCI_VENDOR_ID_ADAPTEC2, 0x080a)
9121         },
9122         {
9123                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9124                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
9125         },
9126         {
9127                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9128                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
9129         },
9130         {
9131                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9132                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
9133         },
9134         {
9135                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9136                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
9137         },
9138         {
9139                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9140                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
9141         },
9142         {
9143                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9144                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
9145         },
9146         {
9147                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9148                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
9149         },
9150         {
9151                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9152                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
9153         },
9154         {
9155                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9156                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
9157         },
9158         {
9159                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9160                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
9161         },
9162         {
9163                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9164                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
9165         },
9166         {
9167                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9168                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
9169         },
9170         {
9171                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9172                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
9173         },
9174         {
9175                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9176                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
9177         },
9178         {
9179                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9180                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
9181         },
9182         {
9183                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9184                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
9185         },
9186         {
9187                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9188                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
9189         },
9190         {
9191                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9192                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
9193         },
9194         {
9195                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9196                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
9197         },
9198         {
9199                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9200                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
9201         },
9202         {
9203                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9204                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
9205         },
9206         {
9207                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9208                                PCI_VENDOR_ID_ADAPTEC2, 0x1400)
9209         },
9210         {
9211                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9212                                PCI_VENDOR_ID_ADAPTEC2, 0x1402)
9213         },
9214         {
9215                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9216                                PCI_VENDOR_ID_ADAPTEC2, 0x1410)
9217         },
9218         {
9219                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9220                                PCI_VENDOR_ID_ADAPTEC2, 0x1411)
9221         },
9222         {
9223                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9224                                PCI_VENDOR_ID_ADAPTEC2, 0x1412)
9225         },
9226         {
9227                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9228                                PCI_VENDOR_ID_ADAPTEC2, 0x1420)
9229         },
9230         {
9231                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9232                                PCI_VENDOR_ID_ADAPTEC2, 0x1430)
9233         },
9234         {
9235                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9236                                PCI_VENDOR_ID_ADAPTEC2, 0x1440)
9237         },
9238         {
9239                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9240                                PCI_VENDOR_ID_ADAPTEC2, 0x1441)
9241         },
9242         {
9243                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9244                                PCI_VENDOR_ID_ADAPTEC2, 0x1450)
9245         },
9246         {
9247                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9248                                PCI_VENDOR_ID_ADAPTEC2, 0x1452)
9249         },
9250         {
9251                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9252                                PCI_VENDOR_ID_ADAPTEC2, 0x1460)
9253         },
9254         {
9255                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9256                                PCI_VENDOR_ID_ADAPTEC2, 0x1461)
9257         },
9258         {
9259                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9260                                PCI_VENDOR_ID_ADAPTEC2, 0x1462)
9261         },
9262         {
9263                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9264                                PCI_VENDOR_ID_ADAPTEC2, 0x1470)
9265         },
9266         {
9267                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9268                                PCI_VENDOR_ID_ADAPTEC2, 0x1471)
9269         },
9270         {
9271                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9272                                PCI_VENDOR_ID_ADAPTEC2, 0x1472)
9273         },
9274         {
9275                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9276                                PCI_VENDOR_ID_ADAPTEC2, 0x1480)
9277         },
9278         {
9279                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9280                                PCI_VENDOR_ID_ADAPTEC2, 0x1490)
9281         },
9282         {
9283                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9284                                PCI_VENDOR_ID_ADAPTEC2, 0x1491)
9285         },
9286         {
9287                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9288                                PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
9289         },
9290         {
9291                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9292                                PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
9293         },
9294         {
9295                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9296                                PCI_VENDOR_ID_ADAPTEC2, 0x14a2)
9297         },
9298         {
9299                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9300                                PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
9301         },
9302         {
9303                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9304                                PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
9305         },
9306         {
9307                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9308                                PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
9309         },
9310         {
9311                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9312                                PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
9313         },
9314         {
9315                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9316                                PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
9317         },
9318         {
9319                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9320                                PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
9321         },
9322         {
9323                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9324                                PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
9325         },
9326         {
9327                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9328                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
9329         },
9330         {
9331                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9332                                PCI_VENDOR_ID_DELL, 0x1fe0)
9333         },
9334         {
9335                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9336                                PCI_VENDOR_ID_HP, 0x0600)
9337         },
9338         {
9339                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9340                                PCI_VENDOR_ID_HP, 0x0601)
9341         },
9342         {
9343                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9344                                PCI_VENDOR_ID_HP, 0x0602)
9345         },
9346         {
9347                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9348                                PCI_VENDOR_ID_HP, 0x0603)
9349         },
9350         {
9351                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9352                                PCI_VENDOR_ID_HP, 0x0609)
9353         },
9354         {
9355                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9356                                PCI_VENDOR_ID_HP, 0x0650)
9357         },
9358         {
9359                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9360                                PCI_VENDOR_ID_HP, 0x0651)
9361         },
9362         {
9363                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9364                                PCI_VENDOR_ID_HP, 0x0652)
9365         },
9366         {
9367                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9368                                PCI_VENDOR_ID_HP, 0x0653)
9369         },
9370         {
9371                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9372                                PCI_VENDOR_ID_HP, 0x0654)
9373         },
9374         {
9375                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9376                                PCI_VENDOR_ID_HP, 0x0655)
9377         },
9378         {
9379                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9380                                PCI_VENDOR_ID_HP, 0x0700)
9381         },
9382         {
9383                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9384                                PCI_VENDOR_ID_HP, 0x0701)
9385         },
9386         {
9387                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9388                                PCI_VENDOR_ID_HP, 0x1001)
9389         },
9390         {
9391                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9392                                PCI_VENDOR_ID_HP, 0x1002)
9393         },
9394         {
9395                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9396                                PCI_VENDOR_ID_HP, 0x1100)
9397         },
9398         {
9399                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9400                                PCI_VENDOR_ID_HP, 0x1101)
9401         },
9402         {
9403                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9404                                0x1590, 0x0294)
9405         },
9406         {
9407                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9408                                0x1590, 0x02db)
9409         },
9410         {
9411                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9412                                0x1590, 0x02dc)
9413         },
9414         {
9415                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9416                                0x1590, 0x032e)
9417         },
9418         {
9419                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9420                                0x1d8d, 0x0800)
9421         },
9422         {
9423                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9424                                0x1d8d, 0x0908)
9425         },
9426         {
9427                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9428                                0x1d8d, 0x0806)
9429         },
9430         {
9431                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9432                                0x1d8d, 0x0916)
9433         },
9434         {
9435                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9436                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
9437         },
9438         {
9439                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9440                                0x1dfc, 0x3161)
9441         },
9442         {
9443                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9444                                0x1cf2, 0x5445)
9445         },
9446         {
9447                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9448                                0x1cf2, 0x5446)
9449         },
9450         {
9451                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9452                                0x1cf2, 0x5447)
9453         },
9454         {
9455                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9456                                0x1cf2, 0x0b27)
9457         },
9458         {
9459                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9460                                0x1cf2, 0x0b29)
9461         },
9462         {
9463                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9464                                0x1cf2, 0x0b45)
9465         },
9466         {
9467                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
9468                                PCI_ANY_ID, PCI_ANY_ID)
9469         },
9470         { 0 }
9471 };
9472
9473 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
9474
9475 static struct pci_driver pqi_pci_driver = {
9476         .name = DRIVER_NAME_SHORT,
9477         .id_table = pqi_pci_id_table,
9478         .probe = pqi_pci_probe,
9479         .remove = pqi_pci_remove,
9480         .shutdown = pqi_shutdown,
9481 #if defined(CONFIG_PM)
9482         .suspend = pqi_suspend,
9483         .resume = pqi_resume,
9484 #endif
9485 };
9486
9487 static int __init pqi_init(void)
9488 {
9489         int rc;
9490
9491         pr_info(DRIVER_NAME "\n");
9492
9493         pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
9494         if (!pqi_sas_transport_template)
9495                 return -ENODEV;
9496
9497         pqi_process_module_params();
9498
9499         rc = pci_register_driver(&pqi_pci_driver);
9500         if (rc)
9501                 sas_release_transport(pqi_sas_transport_template);
9502
9503         return rc;
9504 }
9505
9506 static void __exit pqi_cleanup(void)
9507 {
9508         pci_unregister_driver(&pqi_pci_driver);
9509         sas_release_transport(pqi_sas_transport_template);
9510 }
9511
9512 module_init(pqi_init);
9513 module_exit(pqi_cleanup);
9514
9515 static void __attribute__((unused)) verify_structures(void)
9516 {
9517         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9518                 sis_host_to_ctrl_doorbell) != 0x20);
9519         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9520                 sis_interrupt_mask) != 0x34);
9521         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9522                 sis_ctrl_to_host_doorbell) != 0x9c);
9523         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9524                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
9525         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9526                 sis_driver_scratch) != 0xb0);
9527         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9528                 sis_product_identifier) != 0xb4);
9529         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9530                 sis_firmware_status) != 0xbc);
9531         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9532                 sis_ctrl_shutdown_reason_code) != 0xcc);
9533         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9534                 sis_mailbox) != 0x1000);
9535         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
9536                 pqi_registers) != 0x4000);
9537
9538         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9539                 iu_type) != 0x0);
9540         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9541                 iu_length) != 0x2);
9542         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9543                 response_queue_id) != 0x4);
9544         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
9545                 driver_flags) != 0x6);
9546         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
9547
9548         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9549                 status) != 0x0);
9550         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9551                 service_response) != 0x1);
9552         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9553                 data_present) != 0x2);
9554         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9555                 reserved) != 0x3);
9556         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9557                 residual_count) != 0x4);
9558         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9559                 data_length) != 0x8);
9560         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9561                 reserved1) != 0xa);
9562         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
9563                 data) != 0xc);
9564         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
9565
9566         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9567                 data_in_result) != 0x0);
9568         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9569                 data_out_result) != 0x1);
9570         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9571                 reserved) != 0x2);
9572         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9573                 status) != 0x5);
9574         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9575                 status_qualifier) != 0x6);
9576         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9577                 sense_data_length) != 0x8);
9578         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9579                 response_data_length) != 0xa);
9580         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9581                 data_in_transferred) != 0xc);
9582         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9583                 data_out_transferred) != 0x10);
9584         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
9585                 data) != 0x14);
9586         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
9587
9588         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9589                 signature) != 0x0);
9590         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9591                 function_and_status_code) != 0x8);
9592         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9593                 max_admin_iq_elements) != 0x10);
9594         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9595                 max_admin_oq_elements) != 0x11);
9596         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9597                 admin_iq_element_length) != 0x12);
9598         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9599                 admin_oq_element_length) != 0x13);
9600         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9601                 max_reset_timeout) != 0x14);
9602         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9603                 legacy_intx_status) != 0x18);
9604         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9605                 legacy_intx_mask_set) != 0x1c);
9606         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9607                 legacy_intx_mask_clear) != 0x20);
9608         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9609                 device_status) != 0x40);
9610         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9611                 admin_iq_pi_offset) != 0x48);
9612         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9613                 admin_oq_ci_offset) != 0x50);
9614         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9615                 admin_iq_element_array_addr) != 0x58);
9616         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9617                 admin_oq_element_array_addr) != 0x60);
9618         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9619                 admin_iq_ci_addr) != 0x68);
9620         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9621                 admin_oq_pi_addr) != 0x70);
9622         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9623                 admin_iq_num_elements) != 0x78);
9624         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9625                 admin_oq_num_elements) != 0x79);
9626         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9627                 admin_queue_int_msg_num) != 0x7a);
9628         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9629                 device_error) != 0x80);
9630         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9631                 error_details) != 0x88);
9632         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9633                 device_reset) != 0x90);
9634         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
9635                 power_action) != 0x94);
9636         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
9637
9638         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9639                 header.iu_type) != 0);
9640         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9641                 header.iu_length) != 2);
9642         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9643                 header.driver_flags) != 6);
9644         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9645                 request_id) != 8);
9646         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9647                 function_code) != 10);
9648         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9649                 data.report_device_capability.buffer_length) != 44);
9650         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9651                 data.report_device_capability.sg_descriptor) != 48);
9652         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9653                 data.create_operational_iq.queue_id) != 12);
9654         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9655                 data.create_operational_iq.element_array_addr) != 16);
9656         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9657                 data.create_operational_iq.ci_addr) != 24);
9658         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9659                 data.create_operational_iq.num_elements) != 32);
9660         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9661                 data.create_operational_iq.element_length) != 34);
9662         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9663                 data.create_operational_iq.queue_protocol) != 36);
9664         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9665                 data.create_operational_oq.queue_id) != 12);
9666         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9667                 data.create_operational_oq.element_array_addr) != 16);
9668         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9669                 data.create_operational_oq.pi_addr) != 24);
9670         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9671                 data.create_operational_oq.num_elements) != 32);
9672         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9673                 data.create_operational_oq.element_length) != 34);
9674         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9675                 data.create_operational_oq.queue_protocol) != 36);
9676         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9677                 data.create_operational_oq.int_msg_num) != 40);
9678         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9679                 data.create_operational_oq.coalescing_count) != 42);
9680         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9681                 data.create_operational_oq.min_coalescing_time) != 44);
9682         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9683                 data.create_operational_oq.max_coalescing_time) != 48);
9684         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
9685                 data.delete_operational_queue.queue_id) != 12);
9686         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
9687         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
9688                 data.create_operational_iq) != 64 - 11);
9689         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
9690                 data.create_operational_oq) != 64 - 11);
9691         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
9692                 data.delete_operational_queue) != 64 - 11);
9693
9694         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9695                 header.iu_type) != 0);
9696         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9697                 header.iu_length) != 2);
9698         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9699                 header.driver_flags) != 6);
9700         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9701                 request_id) != 8);
9702         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9703                 function_code) != 10);
9704         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9705                 status) != 11);
9706         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9707                 data.create_operational_iq.status_descriptor) != 12);
9708         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9709                 data.create_operational_iq.iq_pi_offset) != 16);
9710         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9711                 data.create_operational_oq.status_descriptor) != 12);
9712         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
9713                 data.create_operational_oq.oq_ci_offset) != 16);
9714         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
9715
9716         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9717                 header.iu_type) != 0);
9718         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9719                 header.iu_length) != 2);
9720         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9721                 header.response_queue_id) != 4);
9722         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9723                 header.driver_flags) != 6);
9724         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9725                 request_id) != 8);
9726         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9727                 nexus_id) != 10);
9728         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9729                 buffer_length) != 12);
9730         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9731                 lun_number) != 16);
9732         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9733                 protocol_specific) != 24);
9734         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9735                 error_index) != 27);
9736         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9737                 cdb) != 32);
9738         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9739                 timeout) != 60);
9740         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
9741                 sg_descriptors) != 64);
9742         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
9743                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
9744
9745         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9746                 header.iu_type) != 0);
9747         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9748                 header.iu_length) != 2);
9749         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9750                 header.response_queue_id) != 4);
9751         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9752                 header.driver_flags) != 6);
9753         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9754                 request_id) != 8);
9755         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9756                 nexus_id) != 12);
9757         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9758                 buffer_length) != 16);
9759         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9760                 data_encryption_key_index) != 22);
9761         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9762                 encrypt_tweak_lower) != 24);
9763         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9764                 encrypt_tweak_upper) != 28);
9765         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9766                 cdb) != 32);
9767         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9768                 error_index) != 48);
9769         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9770                 num_sg_descriptors) != 50);
9771         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9772                 cdb_length) != 51);
9773         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9774                 lun_number) != 52);
9775         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
9776                 sg_descriptors) != 64);
9777         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
9778                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
9779
9780         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9781                 header.iu_type) != 0);
9782         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9783                 header.iu_length) != 2);
9784         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9785                 request_id) != 8);
9786         BUILD_BUG_ON(offsetof(struct pqi_io_response,
9787                 error_index) != 10);
9788
9789         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9790                 header.iu_type) != 0);
9791         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9792                 header.iu_length) != 2);
9793         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9794                 header.response_queue_id) != 4);
9795         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9796                 request_id) != 8);
9797         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9798                 data.report_event_configuration.buffer_length) != 12);
9799         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9800                 data.report_event_configuration.sg_descriptors) != 16);
9801         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9802                 data.set_event_configuration.global_event_oq_id) != 10);
9803         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9804                 data.set_event_configuration.buffer_length) != 12);
9805         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
9806                 data.set_event_configuration.sg_descriptors) != 16);
9807
9808         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
9809                 max_inbound_iu_length) != 6);
9810         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
9811                 max_outbound_iu_length) != 14);
9812         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
9813
9814         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9815                 data_length) != 0);
9816         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9817                 iq_arbitration_priority_support_bitmask) != 8);
9818         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9819                 maximum_aw_a) != 9);
9820         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9821                 maximum_aw_b) != 10);
9822         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9823                 maximum_aw_c) != 11);
9824         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9825                 max_inbound_queues) != 16);
9826         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9827                 max_elements_per_iq) != 18);
9828         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9829                 max_iq_element_length) != 24);
9830         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9831                 min_iq_element_length) != 26);
9832         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9833                 max_outbound_queues) != 30);
9834         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9835                 max_elements_per_oq) != 32);
9836         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9837                 intr_coalescing_time_granularity) != 34);
9838         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9839                 max_oq_element_length) != 36);
9840         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9841                 min_oq_element_length) != 38);
9842         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
9843                 iu_layer_descriptors) != 64);
9844         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
9845
9846         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
9847                 event_type) != 0);
9848         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
9849                 oq_id) != 2);
9850         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
9851
9852         BUILD_BUG_ON(offsetof(struct pqi_event_config,
9853                 num_event_descriptors) != 2);
9854         BUILD_BUG_ON(offsetof(struct pqi_event_config,
9855                 descriptors) != 4);
9856
9857         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
9858                 ARRAY_SIZE(pqi_supported_event_types));
9859
9860         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9861                 header.iu_type) != 0);
9862         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9863                 header.iu_length) != 2);
9864         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9865                 event_type) != 8);
9866         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9867                 event_id) != 10);
9868         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9869                 additional_event_id) != 12);
9870         BUILD_BUG_ON(offsetof(struct pqi_event_response,
9871                 data) != 16);
9872         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
9873
9874         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9875                 header.iu_type) != 0);
9876         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9877                 header.iu_length) != 2);
9878         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9879                 event_type) != 8);
9880         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9881                 event_id) != 10);
9882         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
9883                 additional_event_id) != 12);
9884         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
9885
9886         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9887                 header.iu_type) != 0);
9888         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9889                 header.iu_length) != 2);
9890         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9891                 request_id) != 8);
9892         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9893                 nexus_id) != 10);
9894         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9895                 timeout) != 14);
9896         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9897                 lun_number) != 16);
9898         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9899                 protocol_specific) != 24);
9900         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9901                 outbound_queue_id_to_manage) != 26);
9902         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9903                 request_id_to_manage) != 28);
9904         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
9905                 task_management_function) != 30);
9906         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
9907
9908         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9909                 header.iu_type) != 0);
9910         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9911                 header.iu_length) != 2);
9912         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9913                 request_id) != 8);
9914         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9915                 nexus_id) != 10);
9916         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9917                 additional_response_info) != 12);
9918         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
9919                 response_code) != 15);
9920         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
9921
9922         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9923                 configured_logical_drive_count) != 0);
9924         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9925                 configuration_signature) != 1);
9926         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9927                 firmware_version_short) != 5);
9928         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9929                 extended_logical_unit_count) != 154);
9930         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9931                 firmware_build_number) != 190);
9932         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9933                 vendor_id) != 200);
9934         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9935                 product_id) != 208);
9936         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9937                 extra_controller_flags) != 286);
9938         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9939                 controller_mode) != 292);
9940         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9941                 spare_part_number) != 293);
9942         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9943                 firmware_version_long) != 325);
9944
9945         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9946                 phys_bay_in_box) != 115);
9947         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9948                 device_type) != 120);
9949         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9950                 redundant_path_present_map) != 1736);
9951         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9952                 active_path_number) != 1738);
9953         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9954                 alternate_paths_phys_connector) != 1739);
9955         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9956                 alternate_paths_phys_box_on_port) != 1755);
9957         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9958                 current_queue_depth_limit) != 1796);
9959         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
9960
9961         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
9962         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
9963                 page_code) != 0);
9964         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
9965                 subpage_code) != 1);
9966         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
9967                 buffer_length) != 2);
9968
9969         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
9970         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
9971                 page_code) != 0);
9972         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
9973                 subpage_code) != 1);
9974         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
9975                 page_length) != 2);
9976
9977         BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
9978                 != 18);
9979         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9980                 header) != 0);
9981         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9982                 firmware_read_support) != 4);
9983         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9984                 driver_read_support) != 5);
9985         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9986                 firmware_write_support) != 6);
9987         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9988                 driver_write_support) != 7);
9989         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9990                 max_transfer_encrypted_sas_sata) != 8);
9991         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9992                 max_transfer_encrypted_nvme) != 10);
9993         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9994                 max_write_raid_5_6) != 12);
9995         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9996                 max_write_raid_1_10_2drive) != 14);
9997         BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
9998                 max_write_raid_1_10_3drive) != 16);
9999
10000         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
10001         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
10002         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
10003                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10004         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
10005                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10006         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
10007         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
10008                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10009         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
10010         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
10011                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
10012
10013         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
10014         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
10015                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
10016 }