drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microsemi PQI-based storage controllers
   4  *    Copyright (c) 2019-2020 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          "1.2.16-012"
  37 #define DRIVER_MAJOR            1
  38 #define DRIVER_MINOR            2
  39 #define DRIVER_RELEASE          16
  40 #define DRIVER_REVISION         12
  41
  42 #define DRIVER_NAME             "Microsemi PQI 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 MODULE_AUTHOR("Microsemi");
  49 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  50         DRIVER_VERSION);
  51 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  52 MODULE_VERSION(DRIVER_VERSION);
  53 MODULE_LICENSE("GPL");
  54
  55 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  56 static void pqi_ctrl_offline_worker(struct work_struct *work);
  57 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  58 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  59 static void pqi_scan_start(struct Scsi_Host *shost);
  60 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  61         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  62         struct pqi_io_request *io_request);
  63 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  64         struct pqi_iu_header *request, unsigned int flags,
  65         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  66 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  67         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  68         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  69         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  70 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  71 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  72 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info);
  73 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
  74         u32 bytes_requested);
  75 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  76 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  77 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  78         struct pqi_scsi_dev *device, unsigned long timeout_secs);
  79
  80 /* for flags argument to pqi_submit_raid_request_synchronous() */
  81 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  82
  83 static struct scsi_transport_template *pqi_sas_transport_template;
  84
  85 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  86
  87 enum pqi_lockup_action {
  88         NONE,
  89         REBOOT,
  90         PANIC
  91 };
  92
  93 static enum pqi_lockup_action pqi_lockup_action = NONE;
  94
  95 static struct {
  96         enum pqi_lockup_action  action;
  97         char                    *name;
  98 } pqi_lockup_actions[] = {
  99         {
 100                 .action = NONE,
 101                 .name = "none",
 102         },
 103         {
 104                 .action = REBOOT,
 105                 .name = "reboot",
 106         },
 107         {
 108                 .action = PANIC,
 109                 .name = "panic",
 110         },
 111 };
 112
 113 static unsigned int pqi_supported_event_types[] = {
 114         PQI_EVENT_TYPE_HOTPLUG,
 115         PQI_EVENT_TYPE_HARDWARE,
 116         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 117         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 118         PQI_EVENT_TYPE_OFA,
 119         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 120         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 121 };
 122
 123 static int pqi_disable_device_id_wildcards;
 124 module_param_named(disable_device_id_wildcards,
 125         pqi_disable_device_id_wildcards, int, 0644);
 126 MODULE_PARM_DESC(disable_device_id_wildcards,
 127         "Disable device ID wildcards.");
 128
 129 static int pqi_disable_heartbeat;
 130 module_param_named(disable_heartbeat,
 131         pqi_disable_heartbeat, int, 0644);
 132 MODULE_PARM_DESC(disable_heartbeat,
 133         "Disable heartbeat.");
 134
 135 static int pqi_disable_ctrl_shutdown;
 136 module_param_named(disable_ctrl_shutdown,
 137         pqi_disable_ctrl_shutdown, int, 0644);
 138 MODULE_PARM_DESC(disable_ctrl_shutdown,
 139         "Disable controller shutdown when controller locked up.");
 140
 141 static char *pqi_lockup_action_param;
 142 module_param_named(lockup_action,
 143         pqi_lockup_action_param, charp, 0644);
 144 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 145         "\t\tSupported: none, reboot, panic\n"
 146         "\t\tDefault: none");
 147
 148 static int pqi_expose_ld_first;
 149 module_param_named(expose_ld_first,
 150         pqi_expose_ld_first, int, 0644);
 151 MODULE_PARM_DESC(expose_ld_first,
 152         "Expose logical drives before physical drives.");
 153
 154 static int pqi_hide_vsep;
 155 module_param_named(hide_vsep,
 156         pqi_hide_vsep, int, 0644);
 157 MODULE_PARM_DESC(hide_vsep,
 158         "Hide the virtual SEP for direct attached drives.");
 159
 160 static char *raid_levels[] = {
 161         "RAID-0",
 162         "RAID-4",
 163         "RAID-1(1+0)",
 164         "RAID-5",
 165         "RAID-5+1",
 166         "RAID-ADG",
 167         "RAID-1(ADM)",
 168 };
 169
 170 static char *pqi_raid_level_to_string(u8 raid_level)
 171 {
 172         if (raid_level < ARRAY_SIZE(raid_levels))
 173                 return raid_levels[raid_level];
 174
 175         return "RAID UNKNOWN";
 176 }
 177
 178 #define SA_RAID_0               0
 179 #define SA_RAID_4               1
 180 #define SA_RAID_1               2       /* also used for RAID 10 */
 181 #define SA_RAID_5               3       /* also used for RAID 50 */
 182 #define SA_RAID_51              4
 183 #define SA_RAID_6               5       /* also used for RAID 60 */
 184 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 185 #define SA_RAID_MAX             SA_RAID_ADM
 186 #define SA_RAID_UNKNOWN         0xff
 187
 188 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 189 {
 190         pqi_prep_for_scsi_done(scmd);
 191         scmd->scsi_done(scmd);
 192 }
 193
 194 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 195 {
 196         sdev->no_write_same = 1;
 197 }
 198
 199 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 200 {
 201         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 202 }
 203
 204 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 205 {
 206         return !device->is_physical_device;
 207 }
 208
 209 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 210 {
 211         return scsi3addr[2] != 0;
 212 }
 213
 214 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 215 {
 216         return !ctrl_info->controller_online;
 217 }
 218
 219 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 220 {
 221         if (ctrl_info->controller_online)
 222                 if (!sis_is_firmware_running(ctrl_info))
 223                         pqi_take_ctrl_offline(ctrl_info);
 224 }
 225
 226 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 227 {
 228         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 229 }
 230
 231 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 232         struct pqi_ctrl_info *ctrl_info)
 233 {
 234         return sis_read_driver_scratch(ctrl_info);
 235 }
 236
 237 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 238         enum pqi_ctrl_mode mode)
 239 {
 240         sis_write_driver_scratch(ctrl_info, mode);
 241 }
 242
 243 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 244 {
 245         ctrl_info->block_device_reset = true;
 246 }
 247
 248 static inline bool pqi_device_reset_blocked(struct pqi_ctrl_info *ctrl_info)
 249 {
 250         return ctrl_info->block_device_reset;
 251 }
 252
 253 static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 254 {
 255         return ctrl_info->block_requests;
 256 }
 257
 258 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 259 {
 260         ctrl_info->block_requests = true;
 261         scsi_block_requests(ctrl_info->scsi_host);
 262 }
 263
 264 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 265 {
 266         ctrl_info->block_requests = false;
 267         wake_up_all(&ctrl_info->block_requests_wait);
 268         pqi_retry_raid_bypass_requests(ctrl_info);
 269         scsi_unblock_requests(ctrl_info->scsi_host);
 270 }
 271
 272 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 273         unsigned long timeout_msecs)
 274 {
 275         unsigned long remaining_msecs;
 276
 277         if (!pqi_ctrl_blocked(ctrl_info))
 278                 return timeout_msecs;
 279
 280         atomic_inc(&ctrl_info->num_blocked_threads);
 281
 282         if (timeout_msecs == NO_TIMEOUT) {
 283                 wait_event(ctrl_info->block_requests_wait,
 284                         !pqi_ctrl_blocked(ctrl_info));
 285                 remaining_msecs = timeout_msecs;
 286         } else {
 287                 unsigned long remaining_jiffies;
 288
 289                 remaining_jiffies =
 290                         wait_event_timeout(ctrl_info->block_requests_wait,
 291                                 !pqi_ctrl_blocked(ctrl_info),
 292                                 msecs_to_jiffies(timeout_msecs));
 293                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 294         }
 295
 296         atomic_dec(&ctrl_info->num_blocked_threads);
 297
 298         return remaining_msecs;
 299 }
 300
 301 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 302 {
 303         while (atomic_read(&ctrl_info->num_busy_threads) >
 304                 atomic_read(&ctrl_info->num_blocked_threads))
 305                 usleep_range(1000, 2000);
 306 }
 307
 308 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 309 {
 310         return device->device_offline;
 311 }
 312
 313 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 314 {
 315         device->in_reset = true;
 316 }
 317
 318 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 319 {
 320         device->in_reset = false;
 321 }
 322
 323 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 324 {
 325         return device->in_reset;
 326 }
 327
 328 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 329 {
 330         ctrl_info->in_ofa = true;
 331 }
 332
 333 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 334 {
 335         ctrl_info->in_ofa = false;
 336 }
 337
 338 static inline bool pqi_ctrl_in_ofa(struct pqi_ctrl_info *ctrl_info)
 339 {
 340         return ctrl_info->in_ofa;
 341 }
 342
 343 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 344 {
 345         device->in_remove = true;
 346 }
 347
 348 static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
 349 {
 350         return device->in_remove;
 351 }
 352
 353 static inline void pqi_ctrl_shutdown_start(struct pqi_ctrl_info *ctrl_info)
 354 {
 355         ctrl_info->in_shutdown = true;
 356 }
 357
 358 static inline bool pqi_ctrl_in_shutdown(struct pqi_ctrl_info *ctrl_info)
 359 {
 360         return ctrl_info->in_shutdown;
 361 }
 362
 363 static inline void pqi_schedule_rescan_worker_with_delay(
 364         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 365 {
 366         if (pqi_ctrl_offline(ctrl_info))
 367                 return;
 368         if (pqi_ctrl_in_ofa(ctrl_info))
 369                 return;
 370
 371         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 372 }
 373
 374 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 375 {
 376         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 377 }
 378
 379 #define PQI_RESCAN_WORK_DELAY   (10 * PQI_HZ)
 380
 381 static inline void pqi_schedule_rescan_worker_delayed(
 382         struct pqi_ctrl_info *ctrl_info)
 383 {
 384         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 385 }
 386
 387 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 388 {
 389         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 390 }
 391
 392 static inline void pqi_cancel_event_worker(struct pqi_ctrl_info *ctrl_info)
 393 {
 394         cancel_work_sync(&ctrl_info->event_work);
 395 }
 396
 397 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 398 {
 399         if (!ctrl_info->heartbeat_counter)
 400                 return 0;
 401
 402         return readl(ctrl_info->heartbeat_counter);
 403 }
 404
 405 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 406 {
 407         if (!ctrl_info->soft_reset_status)
 408                 return 0;
 409
 410         return readb(ctrl_info->soft_reset_status);
 411 }
 412
 413 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info,
 414         u8 clear)
 415 {
 416         u8 status;
 417
 418         if (!ctrl_info->soft_reset_status)
 419                 return;
 420
 421         status = pqi_read_soft_reset_status(ctrl_info);
 422         status &= ~clear;
 423         writeb(status, ctrl_info->soft_reset_status);
 424 }
 425
 426 static int pqi_map_single(struct pci_dev *pci_dev,
 427         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 428         size_t buffer_length, enum dma_data_direction data_direction)
 429 {
 430         dma_addr_t bus_address;
 431
 432         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 433                 return 0;
 434
 435         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 436                 data_direction);
 437         if (dma_mapping_error(&pci_dev->dev, bus_address))
 438                 return -ENOMEM;
 439
 440         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 441         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 442         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 443
 444         return 0;
 445 }
 446
 447 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 448         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 449         enum dma_data_direction data_direction)
 450 {
 451         int i;
 452
 453         if (data_direction == DMA_NONE)
 454                 return;
 455
 456         for (i = 0; i < num_descriptors; i++)
 457                 dma_unmap_single(&pci_dev->dev,
 458                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 459                         get_unaligned_le32(&descriptors[i].length),
 460                         data_direction);
 461 }
 462
 463 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 464         struct pqi_raid_path_request *request, u8 cmd,
 465         u8 *scsi3addr, void *buffer, size_t buffer_length,
 466         u16 vpd_page, enum dma_data_direction *dir)
 467 {
 468         u8 *cdb;
 469         size_t cdb_length = buffer_length;
 470
 471         memset(request, 0, sizeof(*request));
 472
 473         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 474         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 475                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 476                 &request->header.iu_length);
 477         put_unaligned_le32(buffer_length, &request->buffer_length);
 478         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 479         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 480         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 481
 482         cdb = request->cdb;
 483
 484         switch (cmd) {
 485         case INQUIRY:
 486                 request->data_direction = SOP_READ_FLAG;
 487                 cdb[0] = INQUIRY;
 488                 if (vpd_page & VPD_PAGE) {
 489                         cdb[1] = 0x1;
 490                         cdb[2] = (u8)vpd_page;
 491                 }
 492                 cdb[4] = (u8)cdb_length;
 493                 break;
 494         case CISS_REPORT_LOG:
 495         case CISS_REPORT_PHYS:
 496                 request->data_direction = SOP_READ_FLAG;
 497                 cdb[0] = cmd;
 498                 if (cmd == CISS_REPORT_PHYS)
 499                         cdb[1] = CISS_REPORT_PHYS_FLAG_OTHER;
 500                 else
 501                         cdb[1] = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
 502                 put_unaligned_be32(cdb_length, &cdb[6]);
 503                 break;
 504         case CISS_GET_RAID_MAP:
 505                 request->data_direction = SOP_READ_FLAG;
 506                 cdb[0] = CISS_READ;
 507                 cdb[1] = CISS_GET_RAID_MAP;
 508                 put_unaligned_be32(cdb_length, &cdb[6]);
 509                 break;
 510         case SA_FLUSH_CACHE:
 511                 request->data_direction = SOP_WRITE_FLAG;
 512                 cdb[0] = BMIC_WRITE;
 513                 cdb[6] = BMIC_FLUSH_CACHE;
 514                 put_unaligned_be16(cdb_length, &cdb[7]);
 515                 break;
 516         case BMIC_SENSE_DIAG_OPTIONS:
 517                 cdb_length = 0;
 518                 fallthrough;
 519         case BMIC_IDENTIFY_CONTROLLER:
 520         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 521         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 522                 request->data_direction = SOP_READ_FLAG;
 523                 cdb[0] = BMIC_READ;
 524                 cdb[6] = cmd;
 525                 put_unaligned_be16(cdb_length, &cdb[7]);
 526                 break;
 527         case BMIC_SET_DIAG_OPTIONS:
 528                 cdb_length = 0;
 529                 fallthrough;
 530         case BMIC_WRITE_HOST_WELLNESS:
 531                 request->data_direction = SOP_WRITE_FLAG;
 532                 cdb[0] = BMIC_WRITE;
 533                 cdb[6] = cmd;
 534                 put_unaligned_be16(cdb_length, &cdb[7]);
 535                 break;
 536         case BMIC_CSMI_PASSTHRU:
 537                 request->data_direction = SOP_BIDIRECTIONAL;
 538                 cdb[0] = BMIC_WRITE;
 539                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 540                 cdb[6] = cmd;
 541                 put_unaligned_be16(cdb_length, &cdb[7]);
 542                 break;
 543         default:
 544                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
 545                 break;
 546         }
 547
 548         switch (request->data_direction) {
 549         case SOP_READ_FLAG:
 550                 *dir = DMA_FROM_DEVICE;
 551                 break;
 552         case SOP_WRITE_FLAG:
 553                 *dir = DMA_TO_DEVICE;
 554                 break;
 555         case SOP_NO_DIRECTION_FLAG:
 556                 *dir = DMA_NONE;
 557                 break;
 558         default:
 559                 *dir = DMA_BIDIRECTIONAL;
 560                 break;
 561         }
 562
 563         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 564                 buffer, buffer_length, *dir);
 565 }
 566
 567 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 568 {
 569         io_request->scmd = NULL;
 570         io_request->status = 0;
 571         io_request->error_info = NULL;
 572         io_request->raid_bypass = false;
 573 }
 574
 575 static struct pqi_io_request *pqi_alloc_io_request(
 576         struct pqi_ctrl_info *ctrl_info)
 577 {
 578         struct pqi_io_request *io_request;
 579         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 580
 581         while (1) {
 582                 io_request = &ctrl_info->io_request_pool[i];
 583                 if (atomic_inc_return(&io_request->refcount) == 1)
 584                         break;
 585                 atomic_dec(&io_request->refcount);
 586                 i = (i + 1) % ctrl_info->max_io_slots;
 587         }
 588
 589         /* benignly racy */
 590         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 591
 592         pqi_reinit_io_request(io_request);
 593
 594         return io_request;
 595 }
 596
 597 static void pqi_free_io_request(struct pqi_io_request *io_request)
 598 {
 599         atomic_dec(&io_request->refcount);
 600 }
 601
 602 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 603         u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 604         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
 605 {
 606         int rc;
 607         struct pqi_raid_path_request request;
 608         enum dma_data_direction dir;
 609
 610         rc = pqi_build_raid_path_request(ctrl_info, &request,
 611                 cmd, scsi3addr, buffer,
 612                 buffer_length, vpd_page, &dir);
 613         if (rc)
 614                 return rc;
 615
 616         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 617                 error_info, timeout_msecs);
 618
 619         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 620
 621         return rc;
 622 }
 623
 624 /* helper functions for pqi_send_scsi_raid_request */
 625
 626 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 627         u8 cmd, void *buffer, size_t buffer_length)
 628 {
 629         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 630                 buffer, buffer_length, 0, NULL, NO_TIMEOUT);
 631 }
 632
 633 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 634         u8 cmd, void *buffer, size_t buffer_length,
 635         struct pqi_raid_error_info *error_info)
 636 {
 637         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 638                 buffer, buffer_length, 0, error_info, NO_TIMEOUT);
 639 }
 640
 641 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 642         struct bmic_identify_controller *buffer)
 643 {
 644         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 645                 buffer, sizeof(*buffer));
 646 }
 647
 648 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 649         struct bmic_sense_subsystem_info *sense_info)
 650 {
 651         return pqi_send_ctrl_raid_request(ctrl_info,
 652                 BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
 653                 sizeof(*sense_info));
 654 }
 655
 656 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 657         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 658 {
 659         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 660                 buffer, buffer_length, vpd_page, NULL, NO_TIMEOUT);
 661 }
 662
 663 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 664         struct pqi_scsi_dev *device,
 665         struct bmic_identify_physical_device *buffer, size_t buffer_length)
 666 {
 667         int rc;
 668         enum dma_data_direction dir;
 669         u16 bmic_device_index;
 670         struct pqi_raid_path_request request;
 671
 672         rc = pqi_build_raid_path_request(ctrl_info, &request,
 673                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 674                 buffer_length, 0, &dir);
 675         if (rc)
 676                 return rc;
 677
 678         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 679         request.cdb[2] = (u8)bmic_device_index;
 680         request.cdb[9] = (u8)(bmic_device_index >> 8);
 681
 682         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 683                 0, NULL, NO_TIMEOUT);
 684
 685         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 686
 687         return rc;
 688 }
 689
 690 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 691         enum bmic_flush_cache_shutdown_event shutdown_event)
 692 {
 693         int rc;
 694         struct bmic_flush_cache *flush_cache;
 695
 696         /*
 697          * Don't bother trying to flush the cache if the controller is
 698          * locked up.
 699          */
 700         if (pqi_ctrl_offline(ctrl_info))
 701                 return -ENXIO;
 702
 703         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 704         if (!flush_cache)
 705                 return -ENOMEM;
 706
 707         flush_cache->shutdown_event = shutdown_event;
 708
 709         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 710                 sizeof(*flush_cache));
 711
 712         kfree(flush_cache);
 713
 714         return rc;
 715 }
 716
 717 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 718         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 719         struct pqi_raid_error_info *error_info)
 720 {
 721         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 722                 buffer, buffer_length, error_info);
 723 }
 724
 725 #define PQI_FETCH_PTRAID_DATA           (1 << 31)
 726
 727 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 728 {
 729         int rc;
 730         struct bmic_diag_options *diag;
 731
 732         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 733         if (!diag)
 734                 return -ENOMEM;
 735
 736         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 737                 diag, sizeof(*diag));
 738         if (rc)
 739                 goto out;
 740
 741         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 742
 743         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
 744                 sizeof(*diag));
 745
 746 out:
 747         kfree(diag);
 748
 749         return rc;
 750 }
 751
 752 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 753         void *buffer, size_t buffer_length)
 754 {
 755         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 756                 buffer, buffer_length);
 757 }
 758
 759 #pragma pack(1)
 760
 761 struct bmic_host_wellness_driver_version {
 762         u8      start_tag[4];
 763         u8      driver_version_tag[2];
 764         __le16  driver_version_length;
 765         char    driver_version[32];
 766         u8      dont_write_tag[2];
 767         u8      end_tag[2];
 768 };
 769
 770 #pragma pack()
 771
 772 static int pqi_write_driver_version_to_host_wellness(
 773         struct pqi_ctrl_info *ctrl_info)
 774 {
 775         int rc;
 776         struct bmic_host_wellness_driver_version *buffer;
 777         size_t buffer_length;
 778
 779         buffer_length = sizeof(*buffer);
 780
 781         buffer = kmalloc(buffer_length, GFP_KERNEL);
 782         if (!buffer)
 783                 return -ENOMEM;
 784
 785         buffer->start_tag[0] = '<';
 786         buffer->start_tag[1] = 'H';
 787         buffer->start_tag[2] = 'W';
 788         buffer->start_tag[3] = '>';
 789         buffer->driver_version_tag[0] = 'D';
 790         buffer->driver_version_tag[1] = 'V';
 791         put_unaligned_le16(sizeof(buffer->driver_version),
 792                 &buffer->driver_version_length);
 793         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 794                 sizeof(buffer->driver_version) - 1);
 795         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 796         buffer->dont_write_tag[0] = 'D';
 797         buffer->dont_write_tag[1] = 'W';
 798         buffer->end_tag[0] = 'Z';
 799         buffer->end_tag[1] = 'Z';
 800
 801         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 802
 803         kfree(buffer);
 804
 805         return rc;
 806 }
 807
 808 #pragma pack(1)
 809
 810 struct bmic_host_wellness_time {
 811         u8      start_tag[4];
 812         u8      time_tag[2];
 813         __le16  time_length;
 814         u8      time[8];
 815         u8      dont_write_tag[2];
 816         u8      end_tag[2];
 817 };
 818
 819 #pragma pack()
 820
 821 static int pqi_write_current_time_to_host_wellness(
 822         struct pqi_ctrl_info *ctrl_info)
 823 {
 824         int rc;
 825         struct bmic_host_wellness_time *buffer;
 826         size_t buffer_length;
 827         time64_t local_time;
 828         unsigned int year;
 829         struct tm tm;
 830
 831         buffer_length = sizeof(*buffer);
 832
 833         buffer = kmalloc(buffer_length, GFP_KERNEL);
 834         if (!buffer)
 835                 return -ENOMEM;
 836
 837         buffer->start_tag[0] = '<';
 838         buffer->start_tag[1] = 'H';
 839         buffer->start_tag[2] = 'W';
 840         buffer->start_tag[3] = '>';
 841         buffer->time_tag[0] = 'T';
 842         buffer->time_tag[1] = 'D';
 843         put_unaligned_le16(sizeof(buffer->time),
 844                 &buffer->time_length);
 845
 846         local_time = ktime_get_real_seconds();
 847         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 848         year = tm.tm_year + 1900;
 849
 850         buffer->time[0] = bin2bcd(tm.tm_hour);
 851         buffer->time[1] = bin2bcd(tm.tm_min);
 852         buffer->time[2] = bin2bcd(tm.tm_sec);
 853         buffer->time[3] = 0;
 854         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 855         buffer->time[5] = bin2bcd(tm.tm_mday);
 856         buffer->time[6] = bin2bcd(year / 100);
 857         buffer->time[7] = bin2bcd(year % 100);
 858
 859         buffer->dont_write_tag[0] = 'D';
 860         buffer->dont_write_tag[1] = 'W';
 861         buffer->end_tag[0] = 'Z';
 862         buffer->end_tag[1] = 'Z';
 863
 864         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 865
 866         kfree(buffer);
 867
 868         return rc;
 869 }
 870
 871 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * PQI_HZ)
 872
 873 static void pqi_update_time_worker(struct work_struct *work)
 874 {
 875         int rc;
 876         struct pqi_ctrl_info *ctrl_info;
 877
 878         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 879                 update_time_work);
 880
 881         if (pqi_ctrl_offline(ctrl_info))
 882                 return;
 883
 884         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 885         if (rc)
 886                 dev_warn(&ctrl_info->pci_dev->dev,
 887                         "error updating time on controller\n");
 888
 889         schedule_delayed_work(&ctrl_info->update_time_work,
 890                 PQI_UPDATE_TIME_WORK_INTERVAL);
 891 }
 892
 893 static inline void pqi_schedule_update_time_worker(
 894         struct pqi_ctrl_info *ctrl_info)
 895 {
 896         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 897 }
 898
 899 static inline void pqi_cancel_update_time_worker(
 900         struct pqi_ctrl_info *ctrl_info)
 901 {
 902         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 903 }
 904
 905 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 906         void *buffer, size_t buffer_length)
 907 {
 908         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer,
 909                 buffer_length);
 910 }
 911
 912 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 913         void **buffer)
 914 {
 915         int rc;
 916         size_t lun_list_length;
 917         size_t lun_data_length;
 918         size_t new_lun_list_length;
 919         void *lun_data = NULL;
 920         struct report_lun_header *report_lun_header;
 921
 922         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 923         if (!report_lun_header) {
 924                 rc = -ENOMEM;
 925                 goto out;
 926         }
 927
 928         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 929                 sizeof(*report_lun_header));
 930         if (rc)
 931                 goto out;
 932
 933         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 934
 935 again:
 936         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 937
 938         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 939         if (!lun_data) {
 940                 rc = -ENOMEM;
 941                 goto out;
 942         }
 943
 944         if (lun_list_length == 0) {
 945                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 946                 goto out;
 947         }
 948
 949         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 950         if (rc)
 951                 goto out;
 952
 953         new_lun_list_length = get_unaligned_be32(
 954                 &((struct report_lun_header *)lun_data)->list_length);
 955
 956         if (new_lun_list_length > lun_list_length) {
 957                 lun_list_length = new_lun_list_length;
 958                 kfree(lun_data);
 959                 goto again;
 960         }
 961
 962 out:
 963         kfree(report_lun_header);
 964
 965         if (rc) {
 966                 kfree(lun_data);
 967                 lun_data = NULL;
 968         }
 969
 970         *buffer = lun_data;
 971
 972         return rc;
 973 }
 974
 975 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 976         void **buffer)
 977 {
 978         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 979                 buffer);
 980 }
 981
 982 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 983         void **buffer)
 984 {
 985         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 986 }
 987
 988 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 989         struct report_phys_lun_extended **physdev_list,
 990         struct report_log_lun_extended **logdev_list)
 991 {
 992         int rc;
 993         size_t logdev_list_length;
 994         size_t logdev_data_length;
 995         struct report_log_lun_extended *internal_logdev_list;
 996         struct report_log_lun_extended *logdev_data;
 997         struct report_lun_header report_lun_header;
 998
 999         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
1000         if (rc)
1001                 dev_err(&ctrl_info->pci_dev->dev,
1002                         "report physical LUNs failed\n");
1003
1004         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
1005         if (rc)
1006                 dev_err(&ctrl_info->pci_dev->dev,
1007                         "report logical LUNs failed\n");
1008
1009         /*
1010          * Tack the controller itself onto the end of the logical device list.
1011          */
1012
1013         logdev_data = *logdev_list;
1014
1015         if (logdev_data) {
1016                 logdev_list_length =
1017                         get_unaligned_be32(&logdev_data->header.list_length);
1018         } else {
1019                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1020                 logdev_data =
1021                         (struct report_log_lun_extended *)&report_lun_header;
1022                 logdev_list_length = 0;
1023         }
1024
1025         logdev_data_length = sizeof(struct report_lun_header) +
1026                 logdev_list_length;
1027
1028         internal_logdev_list = kmalloc(logdev_data_length +
1029                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
1030         if (!internal_logdev_list) {
1031                 kfree(*logdev_list);
1032                 *logdev_list = NULL;
1033                 return -ENOMEM;
1034         }
1035
1036         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1037         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1038                 sizeof(struct report_log_lun_extended_entry));
1039         put_unaligned_be32(logdev_list_length +
1040                 sizeof(struct report_log_lun_extended_entry),
1041                 &internal_logdev_list->header.list_length);
1042
1043         kfree(*logdev_list);
1044         *logdev_list = internal_logdev_list;
1045
1046         return 0;
1047 }
1048
1049 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1050         int bus, int target, int lun)
1051 {
1052         device->bus = bus;
1053         device->target = target;
1054         device->lun = lun;
1055 }
1056
1057 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1058 {
1059         u8 *scsi3addr;
1060         u32 lunid;
1061         int bus;
1062         int target;
1063         int lun;
1064
1065         scsi3addr = device->scsi3addr;
1066         lunid = get_unaligned_le32(scsi3addr);
1067
1068         if (pqi_is_hba_lunid(scsi3addr)) {
1069                 /* The specified device is the controller. */
1070                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1071                 device->target_lun_valid = true;
1072                 return;
1073         }
1074
1075         if (pqi_is_logical_device(device)) {
1076                 if (device->is_external_raid_device) {
1077                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1078                         target = (lunid >> 16) & 0x3fff;
1079                         lun = lunid & 0xff;
1080                 } else {
1081                         bus = PQI_RAID_VOLUME_BUS;
1082                         target = 0;
1083                         lun = lunid & 0x3fff;
1084                 }
1085                 pqi_set_bus_target_lun(device, bus, target, lun);
1086                 device->target_lun_valid = true;
1087                 return;
1088         }
1089
1090         /*
1091          * Defer target and LUN assignment for non-controller physical devices
1092          * because the SAS transport layer will make these assignments later.
1093          */
1094         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1095 }
1096
1097 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1098         struct pqi_scsi_dev *device)
1099 {
1100         int rc;
1101         u8 raid_level;
1102         u8 *buffer;
1103
1104         raid_level = SA_RAID_UNKNOWN;
1105
1106         buffer = kmalloc(64, GFP_KERNEL);
1107         if (buffer) {
1108                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1109                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1110                 if (rc == 0) {
1111                         raid_level = buffer[8];
1112                         if (raid_level > SA_RAID_MAX)
1113                                 raid_level = SA_RAID_UNKNOWN;
1114                 }
1115                 kfree(buffer);
1116         }
1117
1118         device->raid_level = raid_level;
1119 }
1120
1121 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1122         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1123 {
1124         char *err_msg;
1125         u32 raid_map_size;
1126         u32 r5or6_blocks_per_row;
1127
1128         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1129
1130         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1131                 err_msg = "RAID map too small";
1132                 goto bad_raid_map;
1133         }
1134
1135         if (device->raid_level == SA_RAID_1) {
1136                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1137                         err_msg = "invalid RAID-1 map";
1138                         goto bad_raid_map;
1139                 }
1140         } else if (device->raid_level == SA_RAID_ADM) {
1141                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1142                         err_msg = "invalid RAID-1(ADM) map";
1143                         goto bad_raid_map;
1144                 }
1145         } else if ((device->raid_level == SA_RAID_5 ||
1146                 device->raid_level == SA_RAID_6) &&
1147                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1148                 /* RAID 50/60 */
1149                 r5or6_blocks_per_row =
1150                         get_unaligned_le16(&raid_map->strip_size) *
1151                         get_unaligned_le16(&raid_map->data_disks_per_row);
1152                 if (r5or6_blocks_per_row == 0) {
1153                         err_msg = "invalid RAID-5 or RAID-6 map";
1154                         goto bad_raid_map;
1155                 }
1156         }
1157
1158         return 0;
1159
1160 bad_raid_map:
1161         dev_warn(&ctrl_info->pci_dev->dev,
1162                 "logical device %08x%08x %s\n",
1163                 *((u32 *)&device->scsi3addr),
1164                 *((u32 *)&device->scsi3addr[4]), err_msg);
1165
1166         return -EINVAL;
1167 }
1168
1169 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1170         struct pqi_scsi_dev *device)
1171 {
1172         int rc;
1173         u32 raid_map_size;
1174         struct raid_map *raid_map;
1175
1176         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1177         if (!raid_map)
1178                 return -ENOMEM;
1179
1180         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1181                 device->scsi3addr, raid_map, sizeof(*raid_map),
1182                 0, NULL, NO_TIMEOUT);
1183
1184         if (rc)
1185                 goto error;
1186
1187         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1188
1189         if (raid_map_size > sizeof(*raid_map)) {
1190
1191                 kfree(raid_map);
1192
1193                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1194                 if (!raid_map)
1195                         return -ENOMEM;
1196
1197                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1198                         device->scsi3addr, raid_map, raid_map_size,
1199                         0, NULL, NO_TIMEOUT);
1200                 if (rc)
1201                         goto error;
1202
1203                 if (get_unaligned_le32(&raid_map->structure_size)
1204                         != raid_map_size) {
1205                         dev_warn(&ctrl_info->pci_dev->dev,
1206                                 "Requested %d bytes, received %d bytes",
1207                                 raid_map_size,
1208                                 get_unaligned_le32(&raid_map->structure_size));
1209                         goto error;
1210                 }
1211         }
1212
1213         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1214         if (rc)
1215                 goto error;
1216
1217         device->raid_map = raid_map;
1218
1219         return 0;
1220
1221 error:
1222         kfree(raid_map);
1223
1224         return rc;
1225 }
1226
1227 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1228         struct pqi_scsi_dev *device)
1229 {
1230         int rc;
1231         u8 *buffer;
1232         u8 bypass_status;
1233
1234         buffer = kmalloc(64, GFP_KERNEL);
1235         if (!buffer)
1236                 return;
1237
1238         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1239                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1240         if (rc)
1241                 goto out;
1242
1243 #define RAID_BYPASS_STATUS              4
1244 #define RAID_BYPASS_CONFIGURED          0x1
1245 #define RAID_BYPASS_ENABLED             0x2
1246
1247         bypass_status = buffer[RAID_BYPASS_STATUS];
1248         device->raid_bypass_configured =
1249                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1250         if (device->raid_bypass_configured &&
1251                 (bypass_status & RAID_BYPASS_ENABLED) &&
1252                 pqi_get_raid_map(ctrl_info, device) == 0)
1253                 device->raid_bypass_enabled = true;
1254
1255 out:
1256         kfree(buffer);
1257 }
1258
1259 /*
1260  * Use vendor-specific VPD to determine online/offline status of a volume.
1261  */
1262
1263 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1264         struct pqi_scsi_dev *device)
1265 {
1266         int rc;
1267         size_t page_length;
1268         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1269         bool volume_offline = true;
1270         u32 volume_flags;
1271         struct ciss_vpd_logical_volume_status *vpd;
1272
1273         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1274         if (!vpd)
1275                 goto no_buffer;
1276
1277         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1278                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1279         if (rc)
1280                 goto out;
1281
1282         if (vpd->page_code != CISS_VPD_LV_STATUS)
1283                 goto out;
1284
1285         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1286                 volume_status) + vpd->page_length;
1287         if (page_length < sizeof(*vpd))
1288                 goto out;
1289
1290         volume_status = vpd->volume_status;
1291         volume_flags = get_unaligned_be32(&vpd->flags);
1292         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1293
1294 out:
1295         kfree(vpd);
1296 no_buffer:
1297         device->volume_status = volume_status;
1298         device->volume_offline = volume_offline;
1299 }
1300
1301 static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
1302         struct pqi_scsi_dev *device,
1303         struct bmic_identify_physical_device *id_phys)
1304 {
1305         int rc;
1306
1307         memset(id_phys, 0, sizeof(*id_phys));
1308
1309         rc = pqi_identify_physical_device(ctrl_info, device,
1310                 id_phys, sizeof(*id_phys));
1311         if (rc) {
1312                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1313                 return rc;
1314         }
1315
1316         scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
1317         scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
1318
1319         memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
1320         memcpy(device->model, &id_phys->model[8], sizeof(device->model));
1321
1322         device->box_index = id_phys->box_index;
1323         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1324         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1325         device->queue_depth =
1326                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1327         device->active_path_index = id_phys->active_path_number;
1328         device->path_map = id_phys->redundant_path_present_map;
1329         memcpy(&device->box,
1330                 &id_phys->alternate_paths_phys_box_on_port,
1331                 sizeof(device->box));
1332         memcpy(&device->phys_connector,
1333                 &id_phys->alternate_paths_phys_connector,
1334                 sizeof(device->phys_connector));
1335         device->bay = id_phys->phys_bay_in_box;
1336
1337         return 0;
1338 }
1339
1340 static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
1341         struct pqi_scsi_dev *device)
1342 {
1343         int rc;
1344         u8 *buffer;
1345
1346         buffer = kmalloc(64, GFP_KERNEL);
1347         if (!buffer)
1348                 return -ENOMEM;
1349
1350         /* Send an inquiry to the device to see what it is. */
1351         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1352         if (rc)
1353                 goto out;
1354
1355         scsi_sanitize_inquiry_string(&buffer[8], 8);
1356         scsi_sanitize_inquiry_string(&buffer[16], 16);
1357
1358         device->devtype = buffer[0] & 0x1f;
1359         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1360         memcpy(device->model, &buffer[16], sizeof(device->model));
1361
1362         if (device->devtype == TYPE_DISK) {
1363                 if (device->is_external_raid_device) {
1364                         device->raid_level = SA_RAID_UNKNOWN;
1365                         device->volume_status = CISS_LV_OK;
1366                         device->volume_offline = false;
1367                 } else {
1368                         pqi_get_raid_level(ctrl_info, device);
1369                         pqi_get_raid_bypass_status(ctrl_info, device);
1370                         pqi_get_volume_status(ctrl_info, device);
1371                 }
1372         }
1373
1374 out:
1375         kfree(buffer);
1376
1377         return rc;
1378 }
1379
1380 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1381         struct pqi_scsi_dev *device,
1382         struct bmic_identify_physical_device *id_phys)
1383 {
1384         int rc;
1385
1386         if (device->is_expander_smp_device)
1387                 return 0;
1388
1389         if (pqi_is_logical_device(device))
1390                 rc = pqi_get_logical_device_info(ctrl_info, device);
1391         else
1392                 rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
1393
1394         return rc;
1395 }
1396
1397 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1398         struct pqi_scsi_dev *device)
1399 {
1400         char *status;
1401         static const char unknown_state_str[] =
1402                 "Volume is in an unknown state (%u)";
1403         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1404
1405         switch (device->volume_status) {
1406         case CISS_LV_OK:
1407                 status = "Volume online";
1408                 break;
1409         case CISS_LV_FAILED:
1410                 status = "Volume failed";
1411                 break;
1412         case CISS_LV_NOT_CONFIGURED:
1413                 status = "Volume not configured";
1414                 break;
1415         case CISS_LV_DEGRADED:
1416                 status = "Volume degraded";
1417                 break;
1418         case CISS_LV_READY_FOR_RECOVERY:
1419                 status = "Volume ready for recovery operation";
1420                 break;
1421         case CISS_LV_UNDERGOING_RECOVERY:
1422                 status = "Volume undergoing recovery";
1423                 break;
1424         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1425                 status = "Wrong physical drive was replaced";
1426                 break;
1427         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1428                 status = "A physical drive not properly connected";
1429                 break;
1430         case CISS_LV_HARDWARE_OVERHEATING:
1431                 status = "Hardware is overheating";
1432                 break;
1433         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1434                 status = "Hardware has overheated";
1435                 break;
1436         case CISS_LV_UNDERGOING_EXPANSION:
1437                 status = "Volume undergoing expansion";
1438                 break;
1439         case CISS_LV_NOT_AVAILABLE:
1440                 status = "Volume waiting for transforming volume";
1441                 break;
1442         case CISS_LV_QUEUED_FOR_EXPANSION:
1443                 status = "Volume queued for expansion";
1444                 break;
1445         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1446                 status = "Volume disabled due to SCSI ID conflict";
1447                 break;
1448         case CISS_LV_EJECTED:
1449                 status = "Volume has been ejected";
1450                 break;
1451         case CISS_LV_UNDERGOING_ERASE:
1452                 status = "Volume undergoing background erase";
1453                 break;
1454         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1455                 status = "Volume ready for predictive spare rebuild";
1456                 break;
1457         case CISS_LV_UNDERGOING_RPI:
1458                 status = "Volume undergoing rapid parity initialization";
1459                 break;
1460         case CISS_LV_PENDING_RPI:
1461                 status = "Volume queued for rapid parity initialization";
1462                 break;
1463         case CISS_LV_ENCRYPTED_NO_KEY:
1464                 status = "Encrypted volume inaccessible - key not present";
1465                 break;
1466         case CISS_LV_UNDERGOING_ENCRYPTION:
1467                 status = "Volume undergoing encryption process";
1468                 break;
1469         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1470                 status = "Volume undergoing encryption re-keying process";
1471                 break;
1472         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1473                 status = "Volume encrypted but encryption is disabled";
1474                 break;
1475         case CISS_LV_PENDING_ENCRYPTION:
1476                 status = "Volume pending migration to encrypted state";
1477                 break;
1478         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1479                 status = "Volume pending encryption rekeying";
1480                 break;
1481         case CISS_LV_NOT_SUPPORTED:
1482                 status = "Volume not supported on this controller";
1483                 break;
1484         case CISS_LV_STATUS_UNAVAILABLE:
1485                 status = "Volume status not available";
1486                 break;
1487         default:
1488                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1489                         unknown_state_str, device->volume_status);
1490                 status = unknown_state_buffer;
1491                 break;
1492         }
1493
1494         dev_info(&ctrl_info->pci_dev->dev,
1495                 "scsi %d:%d:%d:%d %s\n",
1496                 ctrl_info->scsi_host->host_no,
1497                 device->bus, device->target, device->lun, status);
1498 }
1499
1500 static void pqi_rescan_worker(struct work_struct *work)
1501 {
1502         struct pqi_ctrl_info *ctrl_info;
1503
1504         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1505                 rescan_work);
1506
1507         pqi_scan_scsi_devices(ctrl_info);
1508 }
1509
1510 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1511         struct pqi_scsi_dev *device)
1512 {
1513         int rc;
1514
1515         if (pqi_is_logical_device(device))
1516                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1517                         device->target, device->lun);
1518         else
1519                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1520
1521         return rc;
1522 }
1523
1524 #define PQI_PENDING_IO_TIMEOUT_SECS     20
1525
1526 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1527         struct pqi_scsi_dev *device)
1528 {
1529         int rc;
1530
1531         pqi_device_remove_start(device);
1532
1533         rc = pqi_device_wait_for_pending_io(ctrl_info, device, PQI_PENDING_IO_TIMEOUT_SECS);
1534         if (rc)
1535                 dev_err(&ctrl_info->pci_dev->dev,
1536                         "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
1537                         ctrl_info->scsi_host->host_no, device->bus,
1538                         device->target, device->lun,
1539                         atomic_read(&device->scsi_cmds_outstanding));
1540
1541         if (pqi_is_logical_device(device))
1542                 scsi_remove_device(device->sdev);
1543         else
1544                 pqi_remove_sas_device(device);
1545 }
1546
1547 /* Assumes the SCSI device list lock is held. */
1548
1549 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1550         int bus, int target, int lun)
1551 {
1552         struct pqi_scsi_dev *device;
1553
1554         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1555                 if (device->bus == bus && device->target == target && device->lun == lun)
1556                         return device;
1557
1558         return NULL;
1559 }
1560
1561 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1562         struct pqi_scsi_dev *dev2)
1563 {
1564         if (dev1->is_physical_device != dev2->is_physical_device)
1565                 return false;
1566
1567         if (dev1->is_physical_device)
1568                 return dev1->wwid == dev2->wwid;
1569
1570         return memcmp(dev1->volume_id, dev2->volume_id,
1571                 sizeof(dev1->volume_id)) == 0;
1572 }
1573
1574 enum pqi_find_result {
1575         DEVICE_NOT_FOUND,
1576         DEVICE_CHANGED,
1577         DEVICE_SAME,
1578 };
1579
1580 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1581         struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
1582 {
1583         struct pqi_scsi_dev *device;
1584
1585         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
1586                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
1587                         *matching_device = device;
1588                         if (pqi_device_equal(device_to_find, device)) {
1589                                 if (device_to_find->volume_offline)
1590                                         return DEVICE_CHANGED;
1591                                 return DEVICE_SAME;
1592                         }
1593                         return DEVICE_CHANGED;
1594                 }
1595         }
1596
1597         return DEVICE_NOT_FOUND;
1598 }
1599
1600 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1601 {
1602         if (device->is_expander_smp_device)
1603                 return "Enclosure SMP    ";
1604
1605         return scsi_device_type(device->devtype);
1606 }
1607
1608 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1609
1610 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1611         char *action, struct pqi_scsi_dev *device)
1612 {
1613         ssize_t count;
1614         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1615
1616         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1617                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1618
1619         if (device->target_lun_valid)
1620                 count += scnprintf(buffer + count,
1621                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1622                         "%d:%d",
1623                         device->target,
1624                         device->lun);
1625         else
1626                 count += scnprintf(buffer + count,
1627                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1628                         "-:-");
1629
1630         if (pqi_is_logical_device(device))
1631                 count += scnprintf(buffer + count,
1632                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1633                         " %08x%08x",
1634                         *((u32 *)&device->scsi3addr),
1635                         *((u32 *)&device->scsi3addr[4]));
1636         else
1637                 count += scnprintf(buffer + count,
1638                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1639                         " %016llx", device->sas_address);
1640
1641         count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1642                 " %s %.8s %.16s ",
1643                 pqi_device_type(device),
1644                 device->vendor,
1645                 device->model);
1646
1647         if (pqi_is_logical_device(device)) {
1648                 if (device->devtype == TYPE_DISK)
1649                         count += scnprintf(buffer + count,
1650                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1651                                 "SSDSmartPathCap%c En%c %-12s",
1652                                 device->raid_bypass_configured ? '+' : '-',
1653                                 device->raid_bypass_enabled ? '+' : '-',
1654                                 pqi_raid_level_to_string(device->raid_level));
1655         } else {
1656                 count += scnprintf(buffer + count,
1657                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1658                         "AIO%c", device->aio_enabled ? '+' : '-');
1659                 if (device->devtype == TYPE_DISK ||
1660                         device->devtype == TYPE_ZBC)
1661                         count += scnprintf(buffer + count,
1662                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1663                                 " qd=%-6d", device->queue_depth);
1664         }
1665
1666         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1667 }
1668
1669 /* Assumes the SCSI device list lock is held. */
1670
1671 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1672         struct pqi_scsi_dev *new_device)
1673 {
1674         existing_device->devtype = new_device->devtype;
1675         existing_device->device_type = new_device->device_type;
1676         existing_device->bus = new_device->bus;
1677         if (new_device->target_lun_valid) {
1678                 existing_device->target = new_device->target;
1679                 existing_device->lun = new_device->lun;
1680                 existing_device->target_lun_valid = true;
1681         }
1682
1683         if ((existing_device->volume_status == CISS_LV_QUEUED_FOR_EXPANSION ||
1684                 existing_device->volume_status == CISS_LV_UNDERGOING_EXPANSION) &&
1685                 new_device->volume_status == CISS_LV_OK)
1686                 existing_device->rescan = true;
1687
1688         /* By definition, the scsi3addr and wwid fields are already the same. */
1689
1690         existing_device->is_physical_device = new_device->is_physical_device;
1691         existing_device->is_external_raid_device =
1692                 new_device->is_external_raid_device;
1693         existing_device->is_expander_smp_device =
1694                 new_device->is_expander_smp_device;
1695         existing_device->aio_enabled = new_device->aio_enabled;
1696         memcpy(existing_device->vendor, new_device->vendor,
1697                 sizeof(existing_device->vendor));
1698         memcpy(existing_device->model, new_device->model,
1699                 sizeof(existing_device->model));
1700         existing_device->sas_address = new_device->sas_address;
1701         existing_device->raid_level = new_device->raid_level;
1702         existing_device->queue_depth = new_device->queue_depth;
1703         existing_device->aio_handle = new_device->aio_handle;
1704         existing_device->volume_status = new_device->volume_status;
1705         existing_device->active_path_index = new_device->active_path_index;
1706         existing_device->path_map = new_device->path_map;
1707         existing_device->bay = new_device->bay;
1708         existing_device->box_index = new_device->box_index;
1709         existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
1710         existing_device->phy_connected_dev_type =
1711                 new_device->phy_connected_dev_type;
1712         memcpy(existing_device->box, new_device->box,
1713                 sizeof(existing_device->box));
1714         memcpy(existing_device->phys_connector, new_device->phys_connector,
1715                 sizeof(existing_device->phys_connector));
1716         existing_device->offload_to_mirror = 0;
1717         kfree(existing_device->raid_map);
1718         existing_device->raid_map = new_device->raid_map;
1719         existing_device->raid_bypass_configured =
1720                 new_device->raid_bypass_configured;
1721         existing_device->raid_bypass_enabled =
1722                 new_device->raid_bypass_enabled;
1723         existing_device->device_offline = false;
1724
1725         /* To prevent this from being freed later. */
1726         new_device->raid_map = NULL;
1727 }
1728
1729 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1730 {
1731         if (device) {
1732                 kfree(device->raid_map);
1733                 kfree(device);
1734         }
1735 }
1736
1737 /*
1738  * Called when exposing a new device to the OS fails in order to re-adjust
1739  * our internal SCSI device list to match the SCSI ML's view.
1740  */
1741
1742 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1743         struct pqi_scsi_dev *device)
1744 {
1745         unsigned long flags;
1746
1747         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1748         list_del(&device->scsi_device_list_entry);
1749         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1750
1751         /* Allow the device structure to be freed later. */
1752         device->keep_device = false;
1753 }
1754
1755 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
1756 {
1757         if (device->is_expander_smp_device)
1758                 return device->sas_port != NULL;
1759
1760         return device->sdev != NULL;
1761 }
1762
1763 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1764         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1765 {
1766         int rc;
1767         unsigned int i;
1768         unsigned long flags;
1769         enum pqi_find_result find_result;
1770         struct pqi_scsi_dev *device;
1771         struct pqi_scsi_dev *next;
1772         struct pqi_scsi_dev *matching_device;
1773         LIST_HEAD(add_list);
1774         LIST_HEAD(delete_list);
1775
1776         /*
1777          * The idea here is to do as little work as possible while holding the
1778          * spinlock.  That's why we go to great pains to defer anything other
1779          * than updating the internal device list until after we release the
1780          * spinlock.
1781          */
1782
1783         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1784
1785         /* Assume that all devices in the existing list have gone away. */
1786         list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
1787                 device->device_gone = true;
1788
1789         for (i = 0; i < num_new_devices; i++) {
1790                 device = new_device_list[i];
1791
1792                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1793                         &matching_device);
1794
1795                 switch (find_result) {
1796                 case DEVICE_SAME:
1797                         /*
1798                          * The newly found device is already in the existing
1799                          * device list.
1800                          */
1801                         device->new_device = false;
1802                         matching_device->device_gone = false;
1803                         pqi_scsi_update_device(matching_device, device);
1804                         break;
1805                 case DEVICE_NOT_FOUND:
1806                         /*
1807                          * The newly found device is NOT in the existing device
1808                          * list.
1809                          */
1810                         device->new_device = true;
1811                         break;
1812                 case DEVICE_CHANGED:
1813                         /*
1814                          * The original device has gone away and we need to add
1815                          * the new device.
1816                          */
1817                         device->new_device = true;
1818                         break;
1819                 }
1820         }
1821
1822         /* Process all devices that have gone away. */
1823         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1824                 scsi_device_list_entry) {
1825                 if (device->device_gone) {
1826                         list_del_init(&device->scsi_device_list_entry);
1827                         list_add_tail(&device->delete_list_entry, &delete_list);
1828                 }
1829         }
1830
1831         /* Process all new devices. */
1832         for (i = 0; i < num_new_devices; i++) {
1833                 device = new_device_list[i];
1834                 if (!device->new_device)
1835                         continue;
1836                 if (device->volume_offline)
1837                         continue;
1838                 list_add_tail(&device->scsi_device_list_entry,
1839                         &ctrl_info->scsi_device_list);
1840                 list_add_tail(&device->add_list_entry, &add_list);
1841                 /* To prevent this device structure from being freed later. */
1842                 device->keep_device = true;
1843         }
1844
1845         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1846
1847         if (pqi_ctrl_in_ofa(ctrl_info))
1848                 pqi_ctrl_ofa_done(ctrl_info);
1849
1850         /* Remove all devices that have gone away. */
1851         list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
1852                 if (device->volume_offline) {
1853                         pqi_dev_info(ctrl_info, "offline", device);
1854                         pqi_show_volume_status(ctrl_info, device);
1855                 }
1856                 list_del(&device->delete_list_entry);
1857                 if (pqi_is_device_added(device)) {
1858                         pqi_remove_device(ctrl_info, device);
1859                 } else {
1860                         if (!device->volume_offline)
1861                                 pqi_dev_info(ctrl_info, "removed", device);
1862                         pqi_free_device(device);
1863                 }
1864         }
1865
1866         /*
1867          * Notify the SCSI ML if the queue depth of any existing device has
1868          * changed.
1869          */
1870         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1871                 scsi_device_list_entry) {
1872                 if (device->sdev) {
1873                         if (device->queue_depth !=
1874                                 device->advertised_queue_depth) {
1875                                 device->advertised_queue_depth = device->queue_depth;
1876                                 scsi_change_queue_depth(device->sdev,
1877                                         device->advertised_queue_depth);
1878                         }
1879                         if (device->rescan) {
1880                                 scsi_rescan_device(&device->sdev->sdev_gendev);
1881                                 device->rescan = false;
1882                         }
1883                 }
1884         }
1885
1886         /* Expose any new devices. */
1887         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1888                 if (!pqi_is_device_added(device)) {
1889                         rc = pqi_add_device(ctrl_info, device);
1890                         if (rc == 0) {
1891                                 pqi_dev_info(ctrl_info, "added", device);
1892                         } else {
1893                                 dev_warn(&ctrl_info->pci_dev->dev,
1894                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1895                                         ctrl_info->scsi_host->host_no,
1896                                         device->bus, device->target,
1897                                         device->lun);
1898                                 pqi_fixup_botched_add(ctrl_info, device);
1899                         }
1900                 }
1901         }
1902 }
1903
1904 static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1905 {
1906         /*
1907          * Only support the HBA controller itself as a RAID
1908          * controller.  If it's a RAID controller other than
1909          * the HBA itself (an external RAID controller, for
1910          * example), we don't support it.
1911          */
1912         if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
1913                 !pqi_is_hba_lunid(device->scsi3addr))
1914                 return false;
1915
1916         return true;
1917 }
1918
1919 static inline bool pqi_skip_device(u8 *scsi3addr)
1920 {
1921         /* Ignore all masked devices. */
1922         if (MASKED_DEVICE(scsi3addr))
1923                 return true;
1924
1925         return false;
1926 }
1927
1928 static inline void pqi_mask_device(u8 *scsi3addr)
1929 {
1930         scsi3addr[3] |= 0xc0;
1931 }
1932
1933 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
1934 {
1935         switch (device->device_type) {
1936         case SA_DEVICE_TYPE_SAS:
1937         case SA_DEVICE_TYPE_EXPANDER_SMP:
1938         case SA_DEVICE_TYPE_SES:
1939                 return true;
1940         }
1941
1942         return false;
1943 }
1944
1945 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
1946 {
1947         return !device->is_physical_device ||
1948                 !pqi_skip_device(device->scsi3addr);
1949 }
1950
1951 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1952 {
1953         int i;
1954         int rc;
1955         LIST_HEAD(new_device_list_head);
1956         struct report_phys_lun_extended *physdev_list = NULL;
1957         struct report_log_lun_extended *logdev_list = NULL;
1958         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1959         struct report_log_lun_extended_entry *log_lun_ext_entry;
1960         struct bmic_identify_physical_device *id_phys = NULL;
1961         u32 num_physicals;
1962         u32 num_logicals;
1963         struct pqi_scsi_dev **new_device_list = NULL;
1964         struct pqi_scsi_dev *device;
1965         struct pqi_scsi_dev *next;
1966         unsigned int num_new_devices;
1967         unsigned int num_valid_devices;
1968         bool is_physical_device;
1969         u8 *scsi3addr;
1970         unsigned int physical_index;
1971         unsigned int logical_index;
1972         static char *out_of_memory_msg =
1973                 "failed to allocate memory, device discovery stopped";
1974
1975         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1976         if (rc)
1977                 goto out;
1978
1979         if (physdev_list)
1980                 num_physicals =
1981                         get_unaligned_be32(&physdev_list->header.list_length)
1982                                 / sizeof(physdev_list->lun_entries[0]);
1983         else
1984                 num_physicals = 0;
1985
1986         if (logdev_list)
1987                 num_logicals =
1988                         get_unaligned_be32(&logdev_list->header.list_length)
1989                                 / sizeof(logdev_list->lun_entries[0]);
1990         else
1991                 num_logicals = 0;
1992
1993         if (num_physicals) {
1994                 /*
1995                  * We need this buffer for calls to pqi_get_physical_disk_info()
1996                  * below.  We allocate it here instead of inside
1997                  * pqi_get_physical_disk_info() because it's a fairly large
1998                  * buffer.
1999                  */
2000                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
2001                 if (!id_phys) {
2002                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2003                                 out_of_memory_msg);
2004                         rc = -ENOMEM;
2005                         goto out;
2006                 }
2007
2008                 if (pqi_hide_vsep) {
2009                         for (i = num_physicals - 1; i >= 0; i--) {
2010                                 phys_lun_ext_entry =
2011                                                 &physdev_list->lun_entries[i];
2012                                 if (CISS_GET_DRIVE_NUMBER(
2013                                         phys_lun_ext_entry->lunid) ==
2014                                                 PQI_VSEP_CISS_BTL) {
2015                                         pqi_mask_device(
2016                                                 phys_lun_ext_entry->lunid);
2017                                         break;
2018                                 }
2019                         }
2020                 }
2021         }
2022
2023         num_new_devices = num_physicals + num_logicals;
2024
2025         new_device_list = kmalloc_array(num_new_devices,
2026                                         sizeof(*new_device_list),
2027                                         GFP_KERNEL);
2028         if (!new_device_list) {
2029                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2030                 rc = -ENOMEM;
2031                 goto out;
2032         }
2033
2034         for (i = 0; i < num_new_devices; i++) {
2035                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2036                 if (!device) {
2037                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2038                                 out_of_memory_msg);
2039                         rc = -ENOMEM;
2040                         goto out;
2041                 }
2042                 list_add_tail(&device->new_device_list_entry,
2043                         &new_device_list_head);
2044         }
2045
2046         device = NULL;
2047         num_valid_devices = 0;
2048         physical_index = 0;
2049         logical_index = 0;
2050
2051         for (i = 0; i < num_new_devices; i++) {
2052
2053                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2054                         (pqi_expose_ld_first && i >= num_logicals)) {
2055                         is_physical_device = true;
2056                         phys_lun_ext_entry =
2057                                 &physdev_list->lun_entries[physical_index++];
2058                         log_lun_ext_entry = NULL;
2059                         scsi3addr = phys_lun_ext_entry->lunid;
2060                 } else {
2061                         is_physical_device = false;
2062                         phys_lun_ext_entry = NULL;
2063                         log_lun_ext_entry =
2064                                 &logdev_list->lun_entries[logical_index++];
2065                         scsi3addr = log_lun_ext_entry->lunid;
2066                 }
2067
2068                 if (is_physical_device && pqi_skip_device(scsi3addr))
2069                         continue;
2070
2071                 if (device)
2072                         device = list_next_entry(device, new_device_list_entry);
2073                 else
2074                         device = list_first_entry(&new_device_list_head,
2075                                 struct pqi_scsi_dev, new_device_list_entry);
2076
2077                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2078                 device->is_physical_device = is_physical_device;
2079                 if (is_physical_device) {
2080                         device->device_type = phys_lun_ext_entry->device_type;
2081                         if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
2082                                 device->is_expander_smp_device = true;
2083                 } else {
2084                         device->is_external_raid_device =
2085                                 pqi_is_external_raid_addr(scsi3addr);
2086                 }
2087
2088                 if (!pqi_is_supported_device(device))
2089                         continue;
2090
2091                 /* Gather information about the device. */
2092                 rc = pqi_get_device_info(ctrl_info, device, id_phys);
2093                 if (rc == -ENOMEM) {
2094                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2095                                 out_of_memory_msg);
2096                         goto out;
2097                 }
2098                 if (rc) {
2099                         if (device->is_physical_device)
2100                                 dev_warn(&ctrl_info->pci_dev->dev,
2101                                         "obtaining device info failed, skipping physical device %016llx\n",
2102                                         get_unaligned_be64(
2103                                                 &phys_lun_ext_entry->wwid));
2104                         else
2105                                 dev_warn(&ctrl_info->pci_dev->dev,
2106                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2107                                         *((u32 *)&device->scsi3addr),
2108                                         *((u32 *)&device->scsi3addr[4]));
2109                         rc = 0;
2110                         continue;
2111                 }
2112
2113                 pqi_assign_bus_target_lun(device);
2114
2115                 if (device->is_physical_device) {
2116                         device->wwid = phys_lun_ext_entry->wwid;
2117                         if ((phys_lun_ext_entry->device_flags &
2118                                 CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
2119                                 phys_lun_ext_entry->aio_handle) {
2120                                 device->aio_enabled = true;
2121                                 device->aio_handle =
2122                                         phys_lun_ext_entry->aio_handle;
2123                         }
2124                 } else {
2125                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
2126                                 sizeof(device->volume_id));
2127                 }
2128
2129                 if (pqi_is_device_with_sas_address(device))
2130                         device->sas_address = get_unaligned_be64(&device->wwid);
2131
2132                 new_device_list[num_valid_devices++] = device;
2133         }
2134
2135         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2136
2137 out:
2138         list_for_each_entry_safe(device, next, &new_device_list_head,
2139                 new_device_list_entry) {
2140                 if (device->keep_device)
2141                         continue;
2142                 list_del(&device->new_device_list_entry);
2143                 pqi_free_device(device);
2144         }
2145
2146         kfree(new_device_list);
2147         kfree(physdev_list);
2148         kfree(logdev_list);
2149         kfree(id_phys);
2150
2151         return rc;
2152 }
2153
2154 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2155 {
2156         int rc = 0;
2157
2158         if (pqi_ctrl_offline(ctrl_info))
2159                 return -ENXIO;
2160
2161         if (!mutex_trylock(&ctrl_info->scan_mutex)) {
2162                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2163                 rc = -EINPROGRESS;
2164         } else {
2165                 rc = pqi_update_scsi_devices(ctrl_info);
2166                 if (rc)
2167                         pqi_schedule_rescan_worker_delayed(ctrl_info);
2168                 mutex_unlock(&ctrl_info->scan_mutex);
2169         }
2170
2171         return rc;
2172 }
2173
2174 static void pqi_scan_start(struct Scsi_Host *shost)
2175 {
2176         struct pqi_ctrl_info *ctrl_info;
2177
2178         ctrl_info = shost_to_hba(shost);
2179         if (pqi_ctrl_in_ofa(ctrl_info))
2180                 return;
2181
2182         pqi_scan_scsi_devices(ctrl_info);
2183 }
2184
2185 /* Returns TRUE if scan is finished. */
2186
2187 static int pqi_scan_finished(struct Scsi_Host *shost,
2188         unsigned long elapsed_time)
2189 {
2190         struct pqi_ctrl_info *ctrl_info;
2191
2192         ctrl_info = shost_priv(shost);
2193
2194         return !mutex_is_locked(&ctrl_info->scan_mutex);
2195 }
2196
2197 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2198 {
2199         mutex_lock(&ctrl_info->scan_mutex);
2200         mutex_unlock(&ctrl_info->scan_mutex);
2201 }
2202
2203 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2204 {
2205         mutex_lock(&ctrl_info->lun_reset_mutex);
2206         mutex_unlock(&ctrl_info->lun_reset_mutex);
2207 }
2208
2209 static void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
2210 {
2211         mutex_lock(&ctrl_info->ofa_mutex);
2212         mutex_unlock(&ctrl_info->ofa_mutex);
2213 }
2214
2215 static inline void pqi_set_encryption_info(
2216         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2217         u64 first_block)
2218 {
2219         u32 volume_blk_size;
2220
2221         /*
2222          * Set the encryption tweak values based on logical block address.
2223          * If the block size is 512, the tweak value is equal to the LBA.
2224          * For other block sizes, tweak value is (LBA * block size) / 512.
2225          */
2226         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2227         if (volume_blk_size != 512)
2228                 first_block = (first_block * volume_blk_size) / 512;
2229
2230         encryption_info->data_encryption_key_index =
2231                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2232         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2233         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2234 }
2235
2236 /*
2237  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2238  */
2239
2240 #define PQI_RAID_BYPASS_INELIGIBLE      1
2241
2242 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2243         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2244         struct pqi_queue_group *queue_group)
2245 {
2246         struct raid_map *raid_map;
2247         bool is_write = false;
2248         u32 map_index;
2249         u64 first_block;
2250         u64 last_block;
2251         u32 block_cnt;
2252         u32 blocks_per_row;
2253         u64 first_row;
2254         u64 last_row;
2255         u32 first_row_offset;
2256         u32 last_row_offset;
2257         u32 first_column;
2258         u32 last_column;
2259         u64 r0_first_row;
2260         u64 r0_last_row;
2261         u32 r5or6_blocks_per_row;
2262         u64 r5or6_first_row;
2263         u64 r5or6_last_row;
2264         u32 r5or6_first_row_offset;
2265         u32 r5or6_last_row_offset;
2266         u32 r5or6_first_column;
2267         u32 r5or6_last_column;
2268         u16 data_disks_per_row;
2269         u32 total_disks_per_row;
2270         u16 layout_map_count;
2271         u32 stripesize;
2272         u16 strip_size;
2273         u32 first_group;
2274         u32 last_group;
2275         u32 current_group;
2276         u32 map_row;
2277         u32 aio_handle;
2278         u64 disk_block;
2279         u32 disk_block_cnt;
2280         u8 cdb[16];
2281         u8 cdb_length;
2282         int offload_to_mirror;
2283         struct pqi_encryption_info *encryption_info_ptr;
2284         struct pqi_encryption_info encryption_info;
2285 #if BITS_PER_LONG == 32
2286         u64 tmpdiv;
2287 #endif
2288
2289         /* Check for valid opcode, get LBA and block count. */
2290         switch (scmd->cmnd[0]) {
2291         case WRITE_6:
2292                 is_write = true;
2293                 fallthrough;
2294         case READ_6:
2295                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2296                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2297                 block_cnt = (u32)scmd->cmnd[4];
2298                 if (block_cnt == 0)
2299                         block_cnt = 256;
2300                 break;
2301         case WRITE_10:
2302                 is_write = true;
2303                 fallthrough;
2304         case READ_10:
2305                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2306                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2307                 break;
2308         case WRITE_12:
2309                 is_write = true;
2310                 fallthrough;
2311         case READ_12:
2312                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2313                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2314                 break;
2315         case WRITE_16:
2316                 is_write = true;
2317                 fallthrough;
2318         case READ_16:
2319                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2320                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2321                 break;
2322         default:
2323                 /* Process via normal I/O path. */
2324                 return PQI_RAID_BYPASS_INELIGIBLE;
2325         }
2326
2327         /* Check for write to non-RAID-0. */
2328         if (is_write && device->raid_level != SA_RAID_0)
2329                 return PQI_RAID_BYPASS_INELIGIBLE;
2330
2331         if (unlikely(block_cnt == 0))
2332                 return PQI_RAID_BYPASS_INELIGIBLE;
2333
2334         last_block = first_block + block_cnt - 1;
2335         raid_map = device->raid_map;
2336
2337         /* Check for invalid block or wraparound. */
2338         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2339                 last_block < first_block)
2340                 return PQI_RAID_BYPASS_INELIGIBLE;
2341
2342         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2343         strip_size = get_unaligned_le16(&raid_map->strip_size);
2344         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2345
2346         /* Calculate stripe information for the request. */
2347         blocks_per_row = data_disks_per_row * strip_size;
2348 #if BITS_PER_LONG == 32
2349         tmpdiv = first_block;
2350         do_div(tmpdiv, blocks_per_row);
2351         first_row = tmpdiv;
2352         tmpdiv = last_block;
2353         do_div(tmpdiv, blocks_per_row);
2354         last_row = tmpdiv;
2355         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2356         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2357         tmpdiv = first_row_offset;
2358         do_div(tmpdiv, strip_size);
2359         first_column = tmpdiv;
2360         tmpdiv = last_row_offset;
2361         do_div(tmpdiv, strip_size);
2362         last_column = tmpdiv;
2363 #else
2364         first_row = first_block / blocks_per_row;
2365         last_row = last_block / blocks_per_row;
2366         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2367         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2368         first_column = first_row_offset / strip_size;
2369         last_column = last_row_offset / strip_size;
2370 #endif
2371
2372         /* If this isn't a single row/column then give to the controller. */
2373         if (first_row != last_row || first_column != last_column)
2374                 return PQI_RAID_BYPASS_INELIGIBLE;
2375
2376         /* Proceeding with driver mapping. */
2377         total_disks_per_row = data_disks_per_row +
2378                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2379         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2380                 get_unaligned_le16(&raid_map->row_cnt);
2381         map_index = (map_row * total_disks_per_row) + first_column;
2382
2383         /* RAID 1 */
2384         if (device->raid_level == SA_RAID_1) {
2385                 if (device->offload_to_mirror)
2386                         map_index += data_disks_per_row;
2387                 device->offload_to_mirror = !device->offload_to_mirror;
2388         } else if (device->raid_level == SA_RAID_ADM) {
2389                 /* RAID ADM */
2390                 /*
2391                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2392                  * divisible by 3.
2393                  */
2394                 offload_to_mirror = device->offload_to_mirror;
2395                 if (offload_to_mirror == 0)  {
2396                         /* use physical disk in the first mirrored group. */
2397                         map_index %= data_disks_per_row;
2398                 } else {
2399                         do {
2400                                 /*
2401                                  * Determine mirror group that map_index
2402                                  * indicates.
2403                                  */
2404                                 current_group = map_index / data_disks_per_row;
2405
2406                                 if (offload_to_mirror != current_group) {
2407                                         if (current_group <
2408                                                 layout_map_count - 1) {
2409                                                 /*
2410                                                  * Select raid index from
2411                                                  * next group.
2412                                                  */
2413                                                 map_index += data_disks_per_row;
2414                                                 current_group++;
2415                                         } else {
2416                                                 /*
2417                                                  * Select raid index from first
2418                                                  * group.
2419                                                  */
2420                                                 map_index %= data_disks_per_row;
2421                                                 current_group = 0;
2422                                         }
2423                                 }
2424                         } while (offload_to_mirror != current_group);
2425                 }
2426
2427                 /* Set mirror group to use next time. */
2428                 offload_to_mirror =
2429                         (offload_to_mirror >= layout_map_count - 1) ?
2430                                 0 : offload_to_mirror + 1;
2431                 device->offload_to_mirror = offload_to_mirror;
2432                 /*
2433                  * Avoid direct use of device->offload_to_mirror within this
2434                  * function since multiple threads might simultaneously
2435                  * increment it beyond the range of device->layout_map_count -1.
2436                  */
2437         } else if ((device->raid_level == SA_RAID_5 ||
2438                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2439                 /* RAID 50/60 */
2440                 /* Verify first and last block are in same RAID group */
2441                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2442                 stripesize = r5or6_blocks_per_row * layout_map_count;
2443 #if BITS_PER_LONG == 32
2444                 tmpdiv = first_block;
2445                 first_group = do_div(tmpdiv, stripesize);
2446                 tmpdiv = first_group;
2447                 do_div(tmpdiv, r5or6_blocks_per_row);
2448                 first_group = tmpdiv;
2449                 tmpdiv = last_block;
2450                 last_group = do_div(tmpdiv, stripesize);
2451                 tmpdiv = last_group;
2452                 do_div(tmpdiv, r5or6_blocks_per_row);
2453                 last_group = tmpdiv;
2454 #else
2455                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2456                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2457 #endif
2458                 if (first_group != last_group)
2459                         return PQI_RAID_BYPASS_INELIGIBLE;
2460
2461                 /* Verify request is in a single row of RAID 5/6 */
2462 #if BITS_PER_LONG == 32
2463                 tmpdiv = first_block;
2464                 do_div(tmpdiv, stripesize);
2465                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2466                 tmpdiv = last_block;
2467                 do_div(tmpdiv, stripesize);
2468                 r5or6_last_row = r0_last_row = tmpdiv;
2469 #else
2470                 first_row = r5or6_first_row = r0_first_row =
2471                         first_block / stripesize;
2472                 r5or6_last_row = r0_last_row = last_block / stripesize;
2473 #endif
2474                 if (r5or6_first_row != r5or6_last_row)
2475                         return PQI_RAID_BYPASS_INELIGIBLE;
2476
2477                 /* Verify request is in a single column */
2478 #if BITS_PER_LONG == 32
2479                 tmpdiv = first_block;
2480                 first_row_offset = do_div(tmpdiv, stripesize);
2481                 tmpdiv = first_row_offset;
2482                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2483                 r5or6_first_row_offset = first_row_offset;
2484                 tmpdiv = last_block;
2485                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2486                 tmpdiv = r5or6_last_row_offset;
2487                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2488                 tmpdiv = r5or6_first_row_offset;
2489                 do_div(tmpdiv, strip_size);
2490                 first_column = r5or6_first_column = tmpdiv;
2491                 tmpdiv = r5or6_last_row_offset;
2492                 do_div(tmpdiv, strip_size);
2493                 r5or6_last_column = tmpdiv;
2494 #else
2495                 first_row_offset = r5or6_first_row_offset =
2496                         (u32)((first_block % stripesize) %
2497                         r5or6_blocks_per_row);
2498
2499                 r5or6_last_row_offset =
2500                         (u32)((last_block % stripesize) %
2501                         r5or6_blocks_per_row);
2502
2503                 first_column = r5or6_first_row_offset / strip_size;
2504                 r5or6_first_column = first_column;
2505                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2506 #endif
2507                 if (r5or6_first_column != r5or6_last_column)
2508                         return PQI_RAID_BYPASS_INELIGIBLE;
2509
2510                 /* Request is eligible */
2511                 map_row =
2512                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2513                         get_unaligned_le16(&raid_map->row_cnt);
2514
2515                 map_index = (first_group *
2516                         (get_unaligned_le16(&raid_map->row_cnt) *
2517                         total_disks_per_row)) +
2518                         (map_row * total_disks_per_row) + first_column;
2519         }
2520
2521         aio_handle = raid_map->disk_data[map_index].aio_handle;
2522         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2523                 first_row * strip_size +
2524                 (first_row_offset - first_column * strip_size);
2525         disk_block_cnt = block_cnt;
2526
2527         /* Handle differing logical/physical block sizes. */
2528         if (raid_map->phys_blk_shift) {
2529                 disk_block <<= raid_map->phys_blk_shift;
2530                 disk_block_cnt <<= raid_map->phys_blk_shift;
2531         }
2532
2533         if (unlikely(disk_block_cnt > 0xffff))
2534                 return PQI_RAID_BYPASS_INELIGIBLE;
2535
2536         /* Build the new CDB for the physical disk I/O. */
2537         if (disk_block > 0xffffffff) {
2538                 cdb[0] = is_write ? WRITE_16 : READ_16;
2539                 cdb[1] = 0;
2540                 put_unaligned_be64(disk_block, &cdb[2]);
2541                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2542                 cdb[14] = 0;
2543                 cdb[15] = 0;
2544                 cdb_length = 16;
2545         } else {
2546                 cdb[0] = is_write ? WRITE_10 : READ_10;
2547                 cdb[1] = 0;
2548                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2549                 cdb[6] = 0;
2550                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2551                 cdb[9] = 0;
2552                 cdb_length = 10;
2553         }
2554
2555         if (get_unaligned_le16(&raid_map->flags) &
2556                 RAID_MAP_ENCRYPTION_ENABLED) {
2557                 pqi_set_encryption_info(&encryption_info, raid_map,
2558                         first_block);
2559                 encryption_info_ptr = &encryption_info;
2560         } else {
2561                 encryption_info_ptr = NULL;
2562         }
2563
2564         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2565                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2566 }
2567
2568 #define PQI_STATUS_IDLE         0x0
2569
2570 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2571 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2572
2573 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2574 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2575 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2576 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2577 #define PQI_DEVICE_STATE_ERROR                          0x4
2578
2579 #define PQI_MODE_READY_TIMEOUT_SECS             30
2580 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2581
2582 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2583 {
2584         struct pqi_device_registers __iomem *pqi_registers;
2585         unsigned long timeout;
2586         u64 signature;
2587         u8 status;
2588
2589         pqi_registers = ctrl_info->pqi_registers;
2590         timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies;
2591
2592         while (1) {
2593                 signature = readq(&pqi_registers->signature);
2594                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2595                         sizeof(signature)) == 0)
2596                         break;
2597                 if (time_after(jiffies, timeout)) {
2598                         dev_err(&ctrl_info->pci_dev->dev,
2599                                 "timed out waiting for PQI signature\n");
2600                         return -ETIMEDOUT;
2601                 }
2602                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2603         }
2604
2605         while (1) {
2606                 status = readb(&pqi_registers->function_and_status_code);
2607                 if (status == PQI_STATUS_IDLE)
2608                         break;
2609                 if (time_after(jiffies, timeout)) {
2610                         dev_err(&ctrl_info->pci_dev->dev,
2611                                 "timed out waiting for PQI IDLE\n");
2612                         return -ETIMEDOUT;
2613                 }
2614                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2615         }
2616
2617         while (1) {
2618                 if (readl(&pqi_registers->device_status) ==
2619                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2620                         break;
2621                 if (time_after(jiffies, timeout)) {
2622                         dev_err(&ctrl_info->pci_dev->dev,
2623                                 "timed out waiting for PQI all registers ready\n");
2624                         return -ETIMEDOUT;
2625                 }
2626                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2627         }
2628
2629         return 0;
2630 }
2631
2632 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2633 {
2634         struct pqi_scsi_dev *device;
2635
2636         device = io_request->scmd->device->hostdata;
2637         device->raid_bypass_enabled = false;
2638         device->aio_enabled = false;
2639 }
2640
2641 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2642 {
2643         struct pqi_ctrl_info *ctrl_info;
2644         struct pqi_scsi_dev *device;
2645
2646         device = sdev->hostdata;
2647         if (device->device_offline)
2648                 return;
2649
2650         device->device_offline = true;
2651         ctrl_info = shost_to_hba(sdev->host);
2652         pqi_schedule_rescan_worker(ctrl_info);
2653         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
2654                 path, ctrl_info->scsi_host->host_no, device->bus,
2655                 device->target, device->lun);
2656 }
2657
2658 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2659 {
2660         u8 scsi_status;
2661         u8 host_byte;
2662         struct scsi_cmnd *scmd;
2663         struct pqi_raid_error_info *error_info;
2664         size_t sense_data_length;
2665         int residual_count;
2666         int xfer_count;
2667         struct scsi_sense_hdr sshdr;
2668
2669         scmd = io_request->scmd;
2670         if (!scmd)
2671                 return;
2672
2673         error_info = io_request->error_info;
2674         scsi_status = error_info->status;
2675         host_byte = DID_OK;
2676
2677         switch (error_info->data_out_result) {
2678         case PQI_DATA_IN_OUT_GOOD:
2679                 break;
2680         case PQI_DATA_IN_OUT_UNDERFLOW:
2681                 xfer_count =
2682                         get_unaligned_le32(&error_info->data_out_transferred);
2683                 residual_count = scsi_bufflen(scmd) - xfer_count;
2684                 scsi_set_resid(scmd, residual_count);
2685                 if (xfer_count < scmd->underflow)
2686                         host_byte = DID_SOFT_ERROR;
2687                 break;
2688         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2689         case PQI_DATA_IN_OUT_ABORTED:
2690                 host_byte = DID_ABORT;
2691                 break;
2692         case PQI_DATA_IN_OUT_TIMEOUT:
2693                 host_byte = DID_TIME_OUT;
2694                 break;
2695         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2696         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2697         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2698         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2699         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2700         case PQI_DATA_IN_OUT_ERROR:
2701         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2702         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2703         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2704         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2705         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2706         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2707         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2708         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2709         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2710         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2711         default:
2712                 host_byte = DID_ERROR;
2713                 break;
2714         }
2715
2716         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2717         if (sense_data_length == 0)
2718                 sense_data_length =
2719                         get_unaligned_le16(&error_info->response_data_length);
2720         if (sense_data_length) {
2721                 if (sense_data_length > sizeof(error_info->data))
2722                         sense_data_length = sizeof(error_info->data);
2723
2724                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2725                         scsi_normalize_sense(error_info->data,
2726                                 sense_data_length, &sshdr) &&
2727                                 sshdr.sense_key == HARDWARE_ERROR &&
2728                                 sshdr.asc == 0x3e) {
2729                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
2730                         struct pqi_scsi_dev *device = scmd->device->hostdata;
2731
2732                         switch (sshdr.ascq) {
2733                         case 0x1: /* LOGICAL UNIT FAILURE */
2734                                 if (printk_ratelimit())
2735                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
2736                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
2737                                 pqi_take_device_offline(scmd->device, "RAID");
2738                                 host_byte = DID_NO_CONNECT;
2739                                 break;
2740
2741                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
2742                                 if (printk_ratelimit())
2743                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
2744                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
2745                                 break;
2746                         }
2747                 }
2748
2749                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2750                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2751                 memcpy(scmd->sense_buffer, error_info->data,
2752                         sense_data_length);
2753         }
2754
2755         scmd->result = scsi_status;
2756         set_host_byte(scmd, host_byte);
2757 }
2758
2759 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2760 {
2761         u8 scsi_status;
2762         u8 host_byte;
2763         struct scsi_cmnd *scmd;
2764         struct pqi_aio_error_info *error_info;
2765         size_t sense_data_length;
2766         int residual_count;
2767         int xfer_count;
2768         bool device_offline;
2769
2770         scmd = io_request->scmd;
2771         error_info = io_request->error_info;
2772         host_byte = DID_OK;
2773         sense_data_length = 0;
2774         device_offline = false;
2775
2776         switch (error_info->service_response) {
2777         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2778                 scsi_status = error_info->status;
2779                 break;
2780         case PQI_AIO_SERV_RESPONSE_FAILURE:
2781                 switch (error_info->status) {
2782                 case PQI_AIO_STATUS_IO_ABORTED:
2783                         scsi_status = SAM_STAT_TASK_ABORTED;
2784                         break;
2785                 case PQI_AIO_STATUS_UNDERRUN:
2786                         scsi_status = SAM_STAT_GOOD;
2787                         residual_count = get_unaligned_le32(
2788                                                 &error_info->residual_count);
2789                         scsi_set_resid(scmd, residual_count);
2790                         xfer_count = scsi_bufflen(scmd) - residual_count;
2791                         if (xfer_count < scmd->underflow)
2792                                 host_byte = DID_SOFT_ERROR;
2793                         break;
2794                 case PQI_AIO_STATUS_OVERRUN:
2795                         scsi_status = SAM_STAT_GOOD;
2796                         break;
2797                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2798                         pqi_aio_path_disabled(io_request);
2799                         scsi_status = SAM_STAT_GOOD;
2800                         io_request->status = -EAGAIN;
2801                         break;
2802                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2803                 case PQI_AIO_STATUS_INVALID_DEVICE:
2804                         if (!io_request->raid_bypass) {
2805                                 device_offline = true;
2806                                 pqi_take_device_offline(scmd->device, "AIO");
2807                                 host_byte = DID_NO_CONNECT;
2808                         }
2809                         scsi_status = SAM_STAT_CHECK_CONDITION;
2810                         break;
2811                 case PQI_AIO_STATUS_IO_ERROR:
2812                 default:
2813                         scsi_status = SAM_STAT_CHECK_CONDITION;
2814                         break;
2815                 }
2816                 break;
2817         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2818         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2819                 scsi_status = SAM_STAT_GOOD;
2820                 break;
2821         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2822         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2823         default:
2824                 scsi_status = SAM_STAT_CHECK_CONDITION;
2825                 break;
2826         }
2827
2828         if (error_info->data_present) {
2829                 sense_data_length =
2830                         get_unaligned_le16(&error_info->data_length);
2831                 if (sense_data_length) {
2832                         if (sense_data_length > sizeof(error_info->data))
2833                                 sense_data_length = sizeof(error_info->data);
2834                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2835                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2836                         memcpy(scmd->sense_buffer, error_info->data,
2837                                 sense_data_length);
2838                 }
2839         }
2840
2841         if (device_offline && sense_data_length == 0)
2842                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2843                         0x3e, 0x1);
2844
2845         scmd->result = scsi_status;
2846         set_host_byte(scmd, host_byte);
2847 }
2848
2849 static void pqi_process_io_error(unsigned int iu_type,
2850         struct pqi_io_request *io_request)
2851 {
2852         switch (iu_type) {
2853         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2854                 pqi_process_raid_io_error(io_request);
2855                 break;
2856         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2857                 pqi_process_aio_io_error(io_request);
2858                 break;
2859         }
2860 }
2861
2862 static int pqi_interpret_task_management_response(
2863         struct pqi_task_management_response *response)
2864 {
2865         int rc;
2866
2867         switch (response->response_code) {
2868         case SOP_TMF_COMPLETE:
2869         case SOP_TMF_FUNCTION_SUCCEEDED:
2870                 rc = 0;
2871                 break;
2872         case SOP_TMF_REJECTED:
2873                 rc = -EAGAIN;
2874                 break;
2875         default:
2876                 rc = -EIO;
2877                 break;
2878         }
2879
2880         return rc;
2881 }
2882
2883 static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info)
2884 {
2885         pqi_take_ctrl_offline(ctrl_info);
2886 }
2887
2888 static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
2889 {
2890         int num_responses;
2891         pqi_index_t oq_pi;
2892         pqi_index_t oq_ci;
2893         struct pqi_io_request *io_request;
2894         struct pqi_io_response *response;
2895         u16 request_id;
2896
2897         num_responses = 0;
2898         oq_ci = queue_group->oq_ci_copy;
2899
2900         while (1) {
2901                 oq_pi = readl(queue_group->oq_pi);
2902                 if (oq_pi >= ctrl_info->num_elements_per_oq) {
2903                         pqi_invalid_response(ctrl_info);
2904                         dev_err(&ctrl_info->pci_dev->dev,
2905                                 "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
2906                                 oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
2907                         return -1;
2908                 }
2909                 if (oq_pi == oq_ci)
2910                         break;
2911
2912                 num_responses++;
2913                 response = queue_group->oq_element_array +
2914                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2915
2916                 request_id = get_unaligned_le16(&response->request_id);
2917                 if (request_id >= ctrl_info->max_io_slots) {
2918                         pqi_invalid_response(ctrl_info);
2919                         dev_err(&ctrl_info->pci_dev->dev,
2920                                 "request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
2921                                 request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
2922                         return -1;
2923                 }
2924
2925                 io_request = &ctrl_info->io_request_pool[request_id];
2926                 if (atomic_read(&io_request->refcount) == 0) {
2927                         pqi_invalid_response(ctrl_info);
2928                         dev_err(&ctrl_info->pci_dev->dev,
2929                                 "request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
2930                                 request_id, oq_pi, oq_ci);
2931                         return -1;
2932                 }
2933
2934                 switch (response->header.iu_type) {
2935                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2936                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2937                         if (io_request->scmd)
2938                                 io_request->scmd->result = 0;
2939                         fallthrough;
2940                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2941                         break;
2942                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
2943                         io_request->status =
2944                                 get_unaligned_le16(
2945                                 &((struct pqi_vendor_general_response *)
2946                                         response)->status);
2947                         break;
2948                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2949                         io_request->status =
2950                                 pqi_interpret_task_management_response(
2951                                         (void *)response);
2952                         break;
2953                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2954                         pqi_aio_path_disabled(io_request);
2955                         io_request->status = -EAGAIN;
2956                         break;
2957                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2958                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2959                         io_request->error_info = ctrl_info->error_buffer +
2960                                 (get_unaligned_le16(&response->error_index) *
2961                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2962                         pqi_process_io_error(response->header.iu_type, io_request);
2963                         break;
2964                 default:
2965                         pqi_invalid_response(ctrl_info);
2966                         dev_err(&ctrl_info->pci_dev->dev,
2967                                 "unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
2968                                 response->header.iu_type, oq_pi, oq_ci);
2969                         return -1;
2970                 }
2971
2972                 io_request->io_complete_callback(io_request, io_request->context);
2973
2974                 /*
2975                  * Note that the I/O request structure CANNOT BE TOUCHED after
2976                  * returning from the I/O completion callback!
2977                  */
2978                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2979         }
2980
2981         if (num_responses) {
2982                 queue_group->oq_ci_copy = oq_ci;
2983                 writel(oq_ci, queue_group->oq_ci);
2984         }
2985
2986         return num_responses;
2987 }
2988
2989 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2990         unsigned int ci, unsigned int elements_in_queue)
2991 {
2992         unsigned int num_elements_used;
2993
2994         if (pi >= ci)
2995                 num_elements_used = pi - ci;
2996         else
2997                 num_elements_used = elements_in_queue - ci + pi;
2998
2999         return elements_in_queue - num_elements_used - 1;
3000 }
3001
3002 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3003         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3004 {
3005         pqi_index_t iq_pi;
3006         pqi_index_t iq_ci;
3007         unsigned long flags;
3008         void *next_element;
3009         struct pqi_queue_group *queue_group;
3010
3011         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3012         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3013
3014         while (1) {
3015                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3016
3017                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3018                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3019
3020                 if (pqi_num_elements_free(iq_pi, iq_ci,
3021                         ctrl_info->num_elements_per_iq))
3022                         break;
3023
3024                 spin_unlock_irqrestore(
3025                         &queue_group->submit_lock[RAID_PATH], flags);
3026
3027                 if (pqi_ctrl_offline(ctrl_info))
3028                         return;
3029         }
3030
3031         next_element = queue_group->iq_element_array[RAID_PATH] +
3032                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3033
3034         memcpy(next_element, iu, iu_length);
3035
3036         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3037         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3038
3039         /*
3040          * This write notifies the controller that an IU is available to be
3041          * processed.
3042          */
3043         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3044
3045         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3046 }
3047
3048 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3049         struct pqi_event *event)
3050 {
3051         struct pqi_event_acknowledge_request request;
3052
3053         memset(&request, 0, sizeof(request));
3054
3055         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3056         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3057                 &request.header.iu_length);
3058         request.event_type = event->event_type;
3059         request.event_id = event->event_id;
3060         request.additional_event_id = event->additional_event_id;
3061
3062         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3063 }
3064
3065 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3066 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3067
3068 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3069         struct pqi_ctrl_info *ctrl_info)
3070 {
3071         unsigned long timeout;
3072         u8 status;
3073
3074         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies;
3075
3076         while (1) {
3077                 status = pqi_read_soft_reset_status(ctrl_info);
3078                 if (status & PQI_SOFT_RESET_INITIATE)
3079                         return RESET_INITIATE_DRIVER;
3080
3081                 if (status & PQI_SOFT_RESET_ABORT)
3082                         return RESET_ABORT;
3083
3084                 if (time_after(jiffies, timeout)) {
3085                         dev_err(&ctrl_info->pci_dev->dev,
3086                                 "timed out waiting for soft reset status\n");
3087                         return RESET_TIMEDOUT;
3088                 }
3089
3090                 if (!sis_is_firmware_running(ctrl_info))
3091                         return RESET_NORESPONSE;
3092
3093                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3094         }
3095 }
3096
3097 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info,
3098         enum pqi_soft_reset_status reset_status)
3099 {
3100         int rc;
3101
3102         switch (reset_status) {
3103         case RESET_INITIATE_DRIVER:
3104         case RESET_TIMEDOUT:
3105                 dev_info(&ctrl_info->pci_dev->dev,
3106                         "resetting controller %u\n", ctrl_info->ctrl_id);
3107                 sis_soft_reset(ctrl_info);
3108                 fallthrough;
3109         case RESET_INITIATE_FIRMWARE:
3110                 rc = pqi_ofa_ctrl_restart(ctrl_info);
3111                 pqi_ofa_free_host_buffer(ctrl_info);
3112                 dev_info(&ctrl_info->pci_dev->dev,
3113                         "Online Firmware Activation for controller %u: %s\n",
3114                         ctrl_info->ctrl_id, rc == 0 ? "SUCCESS" : "FAILED");
3115                 break;
3116         case RESET_ABORT:
3117                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3118                 dev_info(&ctrl_info->pci_dev->dev,
3119                         "Online Firmware Activation for controller %u: %s\n",
3120                         ctrl_info->ctrl_id, "ABORTED");
3121                 break;
3122         case RESET_NORESPONSE:
3123                 pqi_ofa_free_host_buffer(ctrl_info);
3124                 pqi_take_ctrl_offline(ctrl_info);
3125                 break;
3126         }
3127 }
3128
3129 static void pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3130         struct pqi_event *event)
3131 {
3132         u16 event_id;
3133         enum pqi_soft_reset_status status;
3134
3135         event_id = get_unaligned_le16(&event->event_id);
3136
3137         mutex_lock(&ctrl_info->ofa_mutex);
3138
3139         if (event_id == PQI_EVENT_OFA_QUIESCE) {
3140                 dev_info(&ctrl_info->pci_dev->dev,
3141                         "Received Online Firmware Activation quiesce event for controller %u\n",
3142                         ctrl_info->ctrl_id);
3143                 pqi_ofa_ctrl_quiesce(ctrl_info);
3144                 pqi_acknowledge_event(ctrl_info, event);
3145                 if (ctrl_info->soft_reset_handshake_supported) {
3146                         status = pqi_poll_for_soft_reset_status(ctrl_info);
3147                         pqi_process_soft_reset(ctrl_info, status);
3148                 } else {
3149                         pqi_process_soft_reset(ctrl_info,
3150                                         RESET_INITIATE_FIRMWARE);
3151                 }
3152
3153         } else if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3154                 pqi_acknowledge_event(ctrl_info, event);
3155                 pqi_ofa_setup_host_buffer(ctrl_info,
3156                         le32_to_cpu(event->ofa_bytes_requested));
3157                 pqi_ofa_host_memory_update(ctrl_info);
3158         } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3159                 pqi_ofa_free_host_buffer(ctrl_info);
3160                 pqi_acknowledge_event(ctrl_info, event);
3161                 dev_info(&ctrl_info->pci_dev->dev,
3162                         "Online Firmware Activation(%u) cancel reason : %u\n",
3163                         ctrl_info->ctrl_id, event->ofa_cancel_reason);
3164         }
3165
3166         mutex_unlock(&ctrl_info->ofa_mutex);
3167 }
3168
3169 static void pqi_event_worker(struct work_struct *work)
3170 {
3171         unsigned int i;
3172         struct pqi_ctrl_info *ctrl_info;
3173         struct pqi_event *event;
3174
3175         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3176
3177         pqi_ctrl_busy(ctrl_info);
3178         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
3179         if (pqi_ctrl_offline(ctrl_info))
3180                 goto out;
3181
3182         pqi_schedule_rescan_worker_delayed(ctrl_info);
3183
3184         event = ctrl_info->events;
3185         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3186                 if (event->pending) {
3187                         event->pending = false;
3188                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3189                                 pqi_ctrl_unbusy(ctrl_info);
3190                                 pqi_ofa_process_event(ctrl_info, event);
3191                                 return;
3192                         }
3193                         pqi_acknowledge_event(ctrl_info, event);
3194                 }
3195                 event++;
3196         }
3197
3198 out:
3199         pqi_ctrl_unbusy(ctrl_info);
3200 }
3201
3202 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * PQI_HZ)
3203
3204 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3205 {
3206         int num_interrupts;
3207         u32 heartbeat_count;
3208         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
3209                                                      heartbeat_timer);
3210
3211         pqi_check_ctrl_health(ctrl_info);
3212         if (pqi_ctrl_offline(ctrl_info))
3213                 return;
3214
3215         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3216         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3217
3218         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3219                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3220                         dev_err(&ctrl_info->pci_dev->dev,
3221                                 "no heartbeat detected - last heartbeat count: %u\n",
3222                                 heartbeat_count);
3223                         pqi_take_ctrl_offline(ctrl_info);
3224                         return;
3225                 }
3226         } else {
3227                 ctrl_info->previous_num_interrupts = num_interrupts;
3228         }
3229
3230         ctrl_info->previous_heartbeat_count = heartbeat_count;
3231         mod_timer(&ctrl_info->heartbeat_timer,
3232                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3233 }
3234
3235 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3236 {
3237         if (!ctrl_info->heartbeat_counter)
3238                 return;
3239
3240         ctrl_info->previous_num_interrupts =
3241                 atomic_read(&ctrl_info->num_interrupts);
3242         ctrl_info->previous_heartbeat_count =
3243                 pqi_read_heartbeat_counter(ctrl_info);
3244
3245         ctrl_info->heartbeat_timer.expires =
3246                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3247         add_timer(&ctrl_info->heartbeat_timer);
3248 }
3249
3250 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3251 {
3252         del_timer_sync(&ctrl_info->heartbeat_timer);
3253 }
3254
3255 static inline int pqi_event_type_to_event_index(unsigned int event_type)
3256 {
3257         int index;
3258
3259         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
3260                 if (event_type == pqi_supported_event_types[index])
3261                         return index;
3262
3263         return -1;
3264 }
3265
3266 static inline bool pqi_is_supported_event(unsigned int event_type)
3267 {
3268         return pqi_event_type_to_event_index(event_type) != -1;
3269 }
3270
3271 static void pqi_ofa_capture_event_payload(struct pqi_event *event,
3272         struct pqi_event_response *response)
3273 {
3274         u16 event_id;
3275
3276         event_id = get_unaligned_le16(&event->event_id);
3277
3278         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3279                 if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3280                         event->ofa_bytes_requested =
3281                         response->data.ofa_memory_allocation.bytes_requested;
3282                 } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3283                         event->ofa_cancel_reason =
3284                         response->data.ofa_cancelled.reason;
3285                 }
3286         }
3287 }
3288
3289 static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3290 {
3291         int num_events;
3292         pqi_index_t oq_pi;
3293         pqi_index_t oq_ci;
3294         struct pqi_event_queue *event_queue;
3295         struct pqi_event_response *response;
3296         struct pqi_event *event;
3297         int event_index;
3298
3299         event_queue = &ctrl_info->event_queue;
3300         num_events = 0;
3301         oq_ci = event_queue->oq_ci_copy;
3302
3303         while (1) {
3304                 oq_pi = readl(event_queue->oq_pi);
3305                 if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
3306                         pqi_invalid_response(ctrl_info);
3307                         dev_err(&ctrl_info->pci_dev->dev,
3308                                 "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
3309                                 oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
3310                         return -1;
3311                 }
3312
3313                 if (oq_pi == oq_ci)
3314                         break;
3315
3316                 num_events++;
3317                 response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3318
3319                 event_index =
3320                         pqi_event_type_to_event_index(response->event_type);
3321
3322                 if (event_index >= 0 && response->request_acknowledge) {
3323                         event = &ctrl_info->events[event_index];
3324                         event->pending = true;
3325                         event->event_type = response->event_type;
3326                         event->event_id = response->event_id;
3327                         event->additional_event_id = response->additional_event_id;
3328                         if (event->event_type == PQI_EVENT_TYPE_OFA)
3329                                 pqi_ofa_capture_event_payload(event, response);
3330                 }
3331
3332                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3333         }
3334
3335         if (num_events) {
3336                 event_queue->oq_ci_copy = oq_ci;
3337                 writel(oq_ci, event_queue->oq_ci);
3338                 schedule_work(&ctrl_info->event_work);
3339         }
3340
3341         return num_events;
3342 }
3343
3344 #define PQI_LEGACY_INTX_MASK    0x1
3345
3346 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
3347         bool enable_intx)
3348 {
3349         u32 intx_mask;
3350         struct pqi_device_registers __iomem *pqi_registers;
3351         volatile void __iomem *register_addr;
3352
3353         pqi_registers = ctrl_info->pqi_registers;
3354
3355         if (enable_intx)
3356                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3357         else
3358                 register_addr = &pqi_registers->legacy_intx_mask_set;
3359
3360         intx_mask = readl(register_addr);
3361         intx_mask |= PQI_LEGACY_INTX_MASK;
3362         writel(intx_mask, register_addr);
3363 }
3364
3365 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3366         enum pqi_irq_mode new_mode)
3367 {
3368         switch (ctrl_info->irq_mode) {
3369         case IRQ_MODE_MSIX:
3370                 switch (new_mode) {
3371                 case IRQ_MODE_MSIX:
3372                         break;
3373                 case IRQ_MODE_INTX:
3374                         pqi_configure_legacy_intx(ctrl_info, true);
3375                         sis_enable_intx(ctrl_info);
3376                         break;
3377                 case IRQ_MODE_NONE:
3378                         break;
3379                 }
3380                 break;
3381         case IRQ_MODE_INTX:
3382                 switch (new_mode) {
3383                 case IRQ_MODE_MSIX:
3384                         pqi_configure_legacy_intx(ctrl_info, false);
3385                         sis_enable_msix(ctrl_info);
3386                         break;
3387                 case IRQ_MODE_INTX:
3388                         break;
3389                 case IRQ_MODE_NONE:
3390                         pqi_configure_legacy_intx(ctrl_info, false);
3391                         break;
3392                 }
3393                 break;
3394         case IRQ_MODE_NONE:
3395                 switch (new_mode) {
3396                 case IRQ_MODE_MSIX:
3397                         sis_enable_msix(ctrl_info);
3398                         break;
3399                 case IRQ_MODE_INTX:
3400                         pqi_configure_legacy_intx(ctrl_info, true);
3401                         sis_enable_intx(ctrl_info);
3402                         break;
3403                 case IRQ_MODE_NONE:
3404                         break;
3405                 }
3406                 break;
3407         }
3408
3409         ctrl_info->irq_mode = new_mode;
3410 }
3411
3412 #define PQI_LEGACY_INTX_PENDING         0x1
3413
3414 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3415 {
3416         bool valid_irq;
3417         u32 intx_status;
3418
3419         switch (ctrl_info->irq_mode) {
3420         case IRQ_MODE_MSIX:
3421                 valid_irq = true;
3422                 break;
3423         case IRQ_MODE_INTX:
3424                 intx_status =
3425                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3426                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3427                         valid_irq = true;
3428                 else
3429                         valid_irq = false;
3430                 break;
3431         case IRQ_MODE_NONE:
3432         default:
3433                 valid_irq = false;
3434                 break;
3435         }
3436
3437         return valid_irq;
3438 }
3439
3440 static irqreturn_t pqi_irq_handler(int irq, void *data)
3441 {
3442         struct pqi_ctrl_info *ctrl_info;
3443         struct pqi_queue_group *queue_group;
3444         int num_io_responses_handled;
3445         int num_events_handled;
3446
3447         queue_group = data;
3448         ctrl_info = queue_group->ctrl_info;
3449
3450         if (!pqi_is_valid_irq(ctrl_info))
3451                 return IRQ_NONE;
3452
3453         num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3454         if (num_io_responses_handled < 0)
3455                 goto out;
3456
3457         if (irq == ctrl_info->event_irq) {
3458                 num_events_handled = pqi_process_event_intr(ctrl_info);
3459                 if (num_events_handled < 0)
3460                         goto out;
3461         } else {
3462                 num_events_handled = 0;
3463         }
3464
3465         if (num_io_responses_handled + num_events_handled > 0)
3466                 atomic_inc(&ctrl_info->num_interrupts);
3467
3468         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3469         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3470
3471 out:
3472         return IRQ_HANDLED;
3473 }
3474
3475 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3476 {
3477         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3478         int i;
3479         int rc;
3480
3481         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3482
3483         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3484                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3485                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3486                 if (rc) {
3487                         dev_err(&pci_dev->dev,
3488                                 "irq %u init failed with error %d\n",
3489                                 pci_irq_vector(pci_dev, i), rc);
3490                         return rc;
3491                 }
3492                 ctrl_info->num_msix_vectors_initialized++;
3493         }
3494
3495         return 0;
3496 }
3497
3498 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3499 {
3500         int i;
3501
3502         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3503                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3504                         &ctrl_info->queue_groups[i]);
3505
3506         ctrl_info->num_msix_vectors_initialized = 0;
3507 }
3508
3509 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3510 {
3511         int num_vectors_enabled;
3512
3513         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3514                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3515                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3516         if (num_vectors_enabled < 0) {
3517                 dev_err(&ctrl_info->pci_dev->dev,
3518                         "MSI-X init failed with error %d\n",
3519                         num_vectors_enabled);
3520                 return num_vectors_enabled;
3521         }
3522
3523         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3524         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3525         return 0;
3526 }
3527
3528 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3529 {
3530         if (ctrl_info->num_msix_vectors_enabled) {
3531                 pci_free_irq_vectors(ctrl_info->pci_dev);
3532                 ctrl_info->num_msix_vectors_enabled = 0;
3533         }
3534 }
3535
3536 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3537 {
3538         unsigned int i;
3539         size_t alloc_length;
3540         size_t element_array_length_per_iq;
3541         size_t element_array_length_per_oq;
3542         void *element_array;
3543         void __iomem *next_queue_index;
3544         void *aligned_pointer;
3545         unsigned int num_inbound_queues;
3546         unsigned int num_outbound_queues;
3547         unsigned int num_queue_indexes;
3548         struct pqi_queue_group *queue_group;
3549
3550         element_array_length_per_iq =
3551                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3552                 ctrl_info->num_elements_per_iq;
3553         element_array_length_per_oq =
3554                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3555                 ctrl_info->num_elements_per_oq;
3556         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3557         num_outbound_queues = ctrl_info->num_queue_groups;
3558         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3559
3560         aligned_pointer = NULL;
3561
3562         for (i = 0; i < num_inbound_queues; i++) {
3563                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3564                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3565                 aligned_pointer += element_array_length_per_iq;
3566         }
3567
3568         for (i = 0; i < num_outbound_queues; i++) {
3569                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3570                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3571                 aligned_pointer += element_array_length_per_oq;
3572         }
3573
3574         aligned_pointer = PTR_ALIGN(aligned_pointer,
3575                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3576         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3577                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3578
3579         for (i = 0; i < num_queue_indexes; i++) {
3580                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3581                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3582                 aligned_pointer += sizeof(pqi_index_t);
3583         }
3584
3585         alloc_length = (size_t)aligned_pointer +
3586                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3587
3588         alloc_length += PQI_EXTRA_SGL_MEMORY;
3589
3590         ctrl_info->queue_memory_base =
3591                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3592                                    &ctrl_info->queue_memory_base_dma_handle,
3593                                    GFP_KERNEL);
3594
3595         if (!ctrl_info->queue_memory_base)
3596                 return -ENOMEM;
3597
3598         ctrl_info->queue_memory_length = alloc_length;
3599
3600         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3601                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3602
3603         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3604                 queue_group = &ctrl_info->queue_groups[i];
3605                 queue_group->iq_element_array[RAID_PATH] = element_array;
3606                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3607                         ctrl_info->queue_memory_base_dma_handle +
3608                                 (element_array - ctrl_info->queue_memory_base);
3609                 element_array += element_array_length_per_iq;
3610                 element_array = PTR_ALIGN(element_array,
3611                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3612                 queue_group->iq_element_array[AIO_PATH] = element_array;
3613                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3614                         ctrl_info->queue_memory_base_dma_handle +
3615                         (element_array - ctrl_info->queue_memory_base);
3616                 element_array += element_array_length_per_iq;
3617                 element_array = PTR_ALIGN(element_array,
3618                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3619         }
3620
3621         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3622                 queue_group = &ctrl_info->queue_groups[i];
3623                 queue_group->oq_element_array = element_array;
3624                 queue_group->oq_element_array_bus_addr =
3625                         ctrl_info->queue_memory_base_dma_handle +
3626                         (element_array - ctrl_info->queue_memory_base);
3627                 element_array += element_array_length_per_oq;
3628                 element_array = PTR_ALIGN(element_array,
3629                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3630         }
3631
3632         ctrl_info->event_queue.oq_element_array = element_array;
3633         ctrl_info->event_queue.oq_element_array_bus_addr =
3634                 ctrl_info->queue_memory_base_dma_handle +
3635                 (element_array - ctrl_info->queue_memory_base);
3636         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3637                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3638
3639         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
3640                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3641
3642         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3643                 queue_group = &ctrl_info->queue_groups[i];
3644                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3645                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3646                         ctrl_info->queue_memory_base_dma_handle +
3647                         (next_queue_index -
3648                         (void __iomem *)ctrl_info->queue_memory_base);
3649                 next_queue_index += sizeof(pqi_index_t);
3650                 next_queue_index = PTR_ALIGN(next_queue_index,
3651                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3652                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3653                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3654                         ctrl_info->queue_memory_base_dma_handle +
3655                         (next_queue_index -
3656                         (void __iomem *)ctrl_info->queue_memory_base);
3657                 next_queue_index += sizeof(pqi_index_t);
3658                 next_queue_index = PTR_ALIGN(next_queue_index,
3659                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3660                 queue_group->oq_pi = next_queue_index;
3661                 queue_group->oq_pi_bus_addr =
3662                         ctrl_info->queue_memory_base_dma_handle +
3663                         (next_queue_index -
3664                         (void __iomem *)ctrl_info->queue_memory_base);
3665                 next_queue_index += sizeof(pqi_index_t);
3666                 next_queue_index = PTR_ALIGN(next_queue_index,
3667                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3668         }
3669
3670         ctrl_info->event_queue.oq_pi = next_queue_index;
3671         ctrl_info->event_queue.oq_pi_bus_addr =
3672                 ctrl_info->queue_memory_base_dma_handle +
3673                 (next_queue_index -
3674                 (void __iomem *)ctrl_info->queue_memory_base);
3675
3676         return 0;
3677 }
3678
3679 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3680 {
3681         unsigned int i;
3682         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3683         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3684
3685         /*
3686          * Initialize the backpointers to the controller structure in
3687          * each operational queue group structure.
3688          */
3689         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3690                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3691
3692         /*
3693          * Assign IDs to all operational queues.  Note that the IDs
3694          * assigned to operational IQs are independent of the IDs
3695          * assigned to operational OQs.
3696          */
3697         ctrl_info->event_queue.oq_id = next_oq_id++;
3698         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3699                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3700                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3701                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3702         }
3703
3704         /*
3705          * Assign MSI-X table entry indexes to all queues.  Note that the
3706          * interrupt for the event queue is shared with the first queue group.
3707          */
3708         ctrl_info->event_queue.int_msg_num = 0;
3709         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3710                 ctrl_info->queue_groups[i].int_msg_num = i;
3711
3712         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3713                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3714                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3715                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3716                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3717         }
3718 }
3719
3720 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3721 {
3722         size_t alloc_length;
3723         struct pqi_admin_queues_aligned *admin_queues_aligned;
3724         struct pqi_admin_queues *admin_queues;
3725
3726         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3727                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3728
3729         ctrl_info->admin_queue_memory_base =
3730                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3731                                    &ctrl_info->admin_queue_memory_base_dma_handle,
3732                                    GFP_KERNEL);
3733
3734         if (!ctrl_info->admin_queue_memory_base)
3735                 return -ENOMEM;
3736
3737         ctrl_info->admin_queue_memory_length = alloc_length;
3738
3739         admin_queues = &ctrl_info->admin_queues;
3740         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3741                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3742         admin_queues->iq_element_array =
3743                 &admin_queues_aligned->iq_element_array;
3744         admin_queues->oq_element_array =
3745                 &admin_queues_aligned->oq_element_array;
3746         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3747         admin_queues->oq_pi =
3748                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
3749
3750         admin_queues->iq_element_array_bus_addr =
3751                 ctrl_info->admin_queue_memory_base_dma_handle +
3752                 (admin_queues->iq_element_array -
3753                 ctrl_info->admin_queue_memory_base);
3754         admin_queues->oq_element_array_bus_addr =
3755                 ctrl_info->admin_queue_memory_base_dma_handle +
3756                 (admin_queues->oq_element_array -
3757                 ctrl_info->admin_queue_memory_base);
3758         admin_queues->iq_ci_bus_addr =
3759                 ctrl_info->admin_queue_memory_base_dma_handle +
3760                 ((void *)admin_queues->iq_ci -
3761                 ctrl_info->admin_queue_memory_base);
3762         admin_queues->oq_pi_bus_addr =
3763                 ctrl_info->admin_queue_memory_base_dma_handle +
3764                 ((void __iomem *)admin_queues->oq_pi -
3765                 (void __iomem *)ctrl_info->admin_queue_memory_base);
3766
3767         return 0;
3768 }
3769
3770 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          PQI_HZ
3771 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3772
3773 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3774 {
3775         struct pqi_device_registers __iomem *pqi_registers;
3776         struct pqi_admin_queues *admin_queues;
3777         unsigned long timeout;
3778         u8 status;
3779         u32 reg;
3780
3781         pqi_registers = ctrl_info->pqi_registers;
3782         admin_queues = &ctrl_info->admin_queues;
3783
3784         writeq((u64)admin_queues->iq_element_array_bus_addr,
3785                 &pqi_registers->admin_iq_element_array_addr);
3786         writeq((u64)admin_queues->oq_element_array_bus_addr,
3787                 &pqi_registers->admin_oq_element_array_addr);
3788         writeq((u64)admin_queues->iq_ci_bus_addr,
3789                 &pqi_registers->admin_iq_ci_addr);
3790         writeq((u64)admin_queues->oq_pi_bus_addr,
3791                 &pqi_registers->admin_oq_pi_addr);
3792
3793         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3794                 (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
3795                 (admin_queues->int_msg_num << 16);
3796         writel(reg, &pqi_registers->admin_iq_num_elements);
3797         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3798                 &pqi_registers->function_and_status_code);
3799
3800         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3801         while (1) {
3802                 status = readb(&pqi_registers->function_and_status_code);
3803                 if (status == PQI_STATUS_IDLE)
3804                         break;
3805                 if (time_after(jiffies, timeout))
3806                         return -ETIMEDOUT;
3807                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3808         }
3809
3810         /*
3811          * The offset registers are not initialized to the correct
3812          * offsets until *after* the create admin queue pair command
3813          * completes successfully.
3814          */
3815         admin_queues->iq_pi = ctrl_info->iomem_base +
3816                 PQI_DEVICE_REGISTERS_OFFSET +
3817                 readq(&pqi_registers->admin_iq_pi_offset);
3818         admin_queues->oq_ci = ctrl_info->iomem_base +
3819                 PQI_DEVICE_REGISTERS_OFFSET +
3820                 readq(&pqi_registers->admin_oq_ci_offset);
3821
3822         return 0;
3823 }
3824
3825 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3826         struct pqi_general_admin_request *request)
3827 {
3828         struct pqi_admin_queues *admin_queues;
3829         void *next_element;
3830         pqi_index_t iq_pi;
3831
3832         admin_queues = &ctrl_info->admin_queues;
3833         iq_pi = admin_queues->iq_pi_copy;
3834
3835         next_element = admin_queues->iq_element_array +
3836                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3837
3838         memcpy(next_element, request, sizeof(*request));
3839
3840         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3841         admin_queues->iq_pi_copy = iq_pi;
3842
3843         /*
3844          * This write notifies the controller that an IU is available to be
3845          * processed.
3846          */
3847         writel(iq_pi, admin_queues->iq_pi);
3848 }
3849
3850 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3851
3852 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3853         struct pqi_general_admin_response *response)
3854 {
3855         struct pqi_admin_queues *admin_queues;
3856         pqi_index_t oq_pi;
3857         pqi_index_t oq_ci;
3858         unsigned long timeout;
3859
3860         admin_queues = &ctrl_info->admin_queues;
3861         oq_ci = admin_queues->oq_ci_copy;
3862
3863         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies;
3864
3865         while (1) {
3866                 oq_pi = readl(admin_queues->oq_pi);
3867                 if (oq_pi != oq_ci)
3868                         break;
3869                 if (time_after(jiffies, timeout)) {
3870                         dev_err(&ctrl_info->pci_dev->dev,
3871                                 "timed out waiting for admin response\n");
3872                         return -ETIMEDOUT;
3873                 }
3874                 if (!sis_is_firmware_running(ctrl_info))
3875                         return -ENXIO;
3876                 usleep_range(1000, 2000);
3877         }
3878
3879         memcpy(response, admin_queues->oq_element_array +
3880                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3881
3882         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3883         admin_queues->oq_ci_copy = oq_ci;
3884         writel(oq_ci, admin_queues->oq_ci);
3885
3886         return 0;
3887 }
3888
3889 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3890         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3891         struct pqi_io_request *io_request)
3892 {
3893         struct pqi_io_request *next;
3894         void *next_element;
3895         pqi_index_t iq_pi;
3896         pqi_index_t iq_ci;
3897         size_t iu_length;
3898         unsigned long flags;
3899         unsigned int num_elements_needed;
3900         unsigned int num_elements_to_end_of_queue;
3901         size_t copy_count;
3902         struct pqi_iu_header *request;
3903
3904         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3905
3906         if (io_request) {
3907                 io_request->queue_group = queue_group;
3908                 list_add_tail(&io_request->request_list_entry,
3909                         &queue_group->request_list[path]);
3910         }
3911
3912         iq_pi = queue_group->iq_pi_copy[path];
3913
3914         list_for_each_entry_safe(io_request, next,
3915                 &queue_group->request_list[path], request_list_entry) {
3916
3917                 request = io_request->iu;
3918
3919                 iu_length = get_unaligned_le16(&request->iu_length) +
3920                         PQI_REQUEST_HEADER_LENGTH;
3921                 num_elements_needed =
3922                         DIV_ROUND_UP(iu_length,
3923                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3924
3925                 iq_ci = readl(queue_group->iq_ci[path]);
3926
3927                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3928                         ctrl_info->num_elements_per_iq))
3929                         break;
3930
3931                 put_unaligned_le16(queue_group->oq_id,
3932                         &request->response_queue_id);
3933
3934                 next_element = queue_group->iq_element_array[path] +
3935                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3936
3937                 num_elements_to_end_of_queue =
3938                         ctrl_info->num_elements_per_iq - iq_pi;
3939
3940                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3941                         memcpy(next_element, request, iu_length);
3942                 } else {
3943                         copy_count = num_elements_to_end_of_queue *
3944                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3945                         memcpy(next_element, request, copy_count);
3946                         memcpy(queue_group->iq_element_array[path],
3947                                 (u8 *)request + copy_count,
3948                                 iu_length - copy_count);
3949                 }
3950
3951                 iq_pi = (iq_pi + num_elements_needed) %
3952                         ctrl_info->num_elements_per_iq;
3953
3954                 list_del(&io_request->request_list_entry);
3955         }
3956
3957         if (iq_pi != queue_group->iq_pi_copy[path]) {
3958                 queue_group->iq_pi_copy[path] = iq_pi;
3959                 /*
3960                  * This write notifies the controller that one or more IUs are
3961                  * available to be processed.
3962                  */
3963                 writel(iq_pi, queue_group->iq_pi[path]);
3964         }
3965
3966         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3967 }
3968
3969 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3970
3971 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3972         struct completion *wait)
3973 {
3974         int rc;
3975
3976         while (1) {
3977                 if (wait_for_completion_io_timeout(wait,
3978                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) {
3979                         rc = 0;
3980                         break;
3981                 }
3982
3983                 pqi_check_ctrl_health(ctrl_info);
3984                 if (pqi_ctrl_offline(ctrl_info)) {
3985                         rc = -ENXIO;
3986                         break;
3987                 }
3988         }
3989
3990         return rc;
3991 }
3992
3993 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3994         void *context)
3995 {
3996         struct completion *waiting = context;
3997
3998         complete(waiting);
3999 }
4000
4001 static int pqi_process_raid_io_error_synchronous(
4002         struct pqi_raid_error_info *error_info)
4003 {
4004         int rc = -EIO;
4005
4006         switch (error_info->data_out_result) {
4007         case PQI_DATA_IN_OUT_GOOD:
4008                 if (error_info->status == SAM_STAT_GOOD)
4009                         rc = 0;
4010                 break;
4011         case PQI_DATA_IN_OUT_UNDERFLOW:
4012                 if (error_info->status == SAM_STAT_GOOD ||
4013                         error_info->status == SAM_STAT_CHECK_CONDITION)
4014                         rc = 0;
4015                 break;
4016         case PQI_DATA_IN_OUT_ABORTED:
4017                 rc = PQI_CMD_STATUS_ABORTED;
4018                 break;
4019         }
4020
4021         return rc;
4022 }
4023
4024 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4025         struct pqi_iu_header *request, unsigned int flags,
4026         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
4027 {
4028         int rc = 0;
4029         struct pqi_io_request *io_request;
4030         unsigned long start_jiffies;
4031         unsigned long msecs_blocked;
4032         size_t iu_length;
4033         DECLARE_COMPLETION_ONSTACK(wait);
4034
4035         /*
4036          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
4037          * are mutually exclusive.
4038          */
4039
4040         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4041                 if (down_interruptible(&ctrl_info->sync_request_sem))
4042                         return -ERESTARTSYS;
4043         } else {
4044                 if (timeout_msecs == NO_TIMEOUT) {
4045                         down(&ctrl_info->sync_request_sem);
4046                 } else {
4047                         start_jiffies = jiffies;
4048                         if (down_timeout(&ctrl_info->sync_request_sem,
4049                                 msecs_to_jiffies(timeout_msecs)))
4050                                 return -ETIMEDOUT;
4051                         msecs_blocked =
4052                                 jiffies_to_msecs(jiffies - start_jiffies);
4053                         if (msecs_blocked >= timeout_msecs) {
4054                                 rc = -ETIMEDOUT;
4055                                 goto out;
4056                         }
4057                         timeout_msecs -= msecs_blocked;
4058                 }
4059         }
4060
4061         pqi_ctrl_busy(ctrl_info);
4062         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
4063         if (timeout_msecs == 0) {
4064                 pqi_ctrl_unbusy(ctrl_info);
4065                 rc = -ETIMEDOUT;
4066                 goto out;
4067         }
4068
4069         if (pqi_ctrl_offline(ctrl_info)) {
4070                 pqi_ctrl_unbusy(ctrl_info);
4071                 rc = -ENXIO;
4072                 goto out;
4073         }
4074
4075         atomic_inc(&ctrl_info->sync_cmds_outstanding);
4076
4077         io_request = pqi_alloc_io_request(ctrl_info);
4078
4079         put_unaligned_le16(io_request->index,
4080                 &(((struct pqi_raid_path_request *)request)->request_id));
4081
4082         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4083                 ((struct pqi_raid_path_request *)request)->error_index =
4084                         ((struct pqi_raid_path_request *)request)->request_id;
4085
4086         iu_length = get_unaligned_le16(&request->iu_length) +
4087                 PQI_REQUEST_HEADER_LENGTH;
4088         memcpy(io_request->iu, request, iu_length);
4089
4090         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4091         io_request->context = &wait;
4092
4093         pqi_start_io(ctrl_info,
4094                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4095                 io_request);
4096
4097         pqi_ctrl_unbusy(ctrl_info);
4098
4099         if (timeout_msecs == NO_TIMEOUT) {
4100                 pqi_wait_for_completion_io(ctrl_info, &wait);
4101         } else {
4102                 if (!wait_for_completion_io_timeout(&wait,
4103                         msecs_to_jiffies(timeout_msecs))) {
4104                         dev_warn(&ctrl_info->pci_dev->dev,
4105                                 "command timed out\n");
4106                         rc = -ETIMEDOUT;
4107                 }
4108         }
4109
4110         if (error_info) {
4111                 if (io_request->error_info)
4112                         memcpy(error_info, io_request->error_info,
4113                                 sizeof(*error_info));
4114                 else
4115                         memset(error_info, 0, sizeof(*error_info));
4116         } else if (rc == 0 && io_request->error_info) {
4117                 rc = pqi_process_raid_io_error_synchronous(
4118                         io_request->error_info);
4119         }
4120
4121         pqi_free_io_request(io_request);
4122
4123         atomic_dec(&ctrl_info->sync_cmds_outstanding);
4124 out:
4125         up(&ctrl_info->sync_request_sem);
4126
4127         return rc;
4128 }
4129
4130 static int pqi_validate_admin_response(
4131         struct pqi_general_admin_response *response, u8 expected_function_code)
4132 {
4133         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4134                 return -EINVAL;
4135
4136         if (get_unaligned_le16(&response->header.iu_length) !=
4137                 PQI_GENERAL_ADMIN_IU_LENGTH)
4138                 return -EINVAL;
4139
4140         if (response->function_code != expected_function_code)
4141                 return -EINVAL;
4142
4143         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4144                 return -EINVAL;
4145
4146         return 0;
4147 }
4148
4149 static int pqi_submit_admin_request_synchronous(
4150         struct pqi_ctrl_info *ctrl_info,
4151         struct pqi_general_admin_request *request,
4152         struct pqi_general_admin_response *response)
4153 {
4154         int rc;
4155
4156         pqi_submit_admin_request(ctrl_info, request);
4157
4158         rc = pqi_poll_for_admin_response(ctrl_info, response);
4159
4160         if (rc == 0)
4161                 rc = pqi_validate_admin_response(response,
4162                         request->function_code);
4163
4164         return rc;
4165 }
4166
4167 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4168 {
4169         int rc;
4170         struct pqi_general_admin_request request;
4171         struct pqi_general_admin_response response;
4172         struct pqi_device_capability *capability;
4173         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4174
4175         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4176         if (!capability)
4177                 return -ENOMEM;
4178
4179         memset(&request, 0, sizeof(request));
4180
4181         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4182         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4183                 &request.header.iu_length);
4184         request.function_code =
4185                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4186         put_unaligned_le32(sizeof(*capability),
4187                 &request.data.report_device_capability.buffer_length);
4188
4189         rc = pqi_map_single(ctrl_info->pci_dev,
4190                 &request.data.report_device_capability.sg_descriptor,
4191                 capability, sizeof(*capability),
4192                 DMA_FROM_DEVICE);
4193         if (rc)
4194                 goto out;
4195
4196         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4197                 &response);
4198
4199         pqi_pci_unmap(ctrl_info->pci_dev,
4200                 &request.data.report_device_capability.sg_descriptor, 1,
4201                 DMA_FROM_DEVICE);
4202
4203         if (rc)
4204                 goto out;
4205
4206         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4207                 rc = -EIO;
4208                 goto out;
4209         }
4210
4211         ctrl_info->max_inbound_queues =
4212                 get_unaligned_le16(&capability->max_inbound_queues);
4213         ctrl_info->max_elements_per_iq =
4214                 get_unaligned_le16(&capability->max_elements_per_iq);
4215         ctrl_info->max_iq_element_length =
4216                 get_unaligned_le16(&capability->max_iq_element_length)
4217                 * 16;
4218         ctrl_info->max_outbound_queues =
4219                 get_unaligned_le16(&capability->max_outbound_queues);
4220         ctrl_info->max_elements_per_oq =
4221                 get_unaligned_le16(&capability->max_elements_per_oq);
4222         ctrl_info->max_oq_element_length =
4223                 get_unaligned_le16(&capability->max_oq_element_length)
4224                 * 16;
4225
4226         sop_iu_layer_descriptor =
4227                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4228
4229         ctrl_info->max_inbound_iu_length_per_firmware =
4230                 get_unaligned_le16(
4231                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4232         ctrl_info->inbound_spanning_supported =
4233                 sop_iu_layer_descriptor->inbound_spanning_supported;
4234         ctrl_info->outbound_spanning_supported =
4235                 sop_iu_layer_descriptor->outbound_spanning_supported;
4236
4237 out:
4238         kfree(capability);
4239
4240         return rc;
4241 }
4242
4243 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4244 {
4245         if (ctrl_info->max_iq_element_length <
4246                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4247                 dev_err(&ctrl_info->pci_dev->dev,
4248                         "max. inbound queue element length of %d is less than the required length of %d\n",
4249                         ctrl_info->max_iq_element_length,
4250                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4251                 return -EINVAL;
4252         }
4253
4254         if (ctrl_info->max_oq_element_length <
4255                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4256                 dev_err(&ctrl_info->pci_dev->dev,
4257                         "max. outbound queue element length of %d is less than the required length of %d\n",
4258                         ctrl_info->max_oq_element_length,
4259                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4260                 return -EINVAL;
4261         }
4262
4263         if (ctrl_info->max_inbound_iu_length_per_firmware <
4264                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4265                 dev_err(&ctrl_info->pci_dev->dev,
4266                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4267                         ctrl_info->max_inbound_iu_length_per_firmware,
4268                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4269                 return -EINVAL;
4270         }
4271
4272         if (!ctrl_info->inbound_spanning_supported) {
4273                 dev_err(&ctrl_info->pci_dev->dev,
4274                         "the controller does not support inbound spanning\n");
4275                 return -EINVAL;
4276         }
4277
4278         if (ctrl_info->outbound_spanning_supported) {
4279                 dev_err(&ctrl_info->pci_dev->dev,
4280                         "the controller supports outbound spanning but this driver does not\n");
4281                 return -EINVAL;
4282         }
4283
4284         return 0;
4285 }
4286
4287 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4288 {
4289         int rc;
4290         struct pqi_event_queue *event_queue;
4291         struct pqi_general_admin_request request;
4292         struct pqi_general_admin_response response;
4293
4294         event_queue = &ctrl_info->event_queue;
4295
4296         /*
4297          * Create OQ (Outbound Queue - device to host queue) to dedicate
4298          * to events.
4299          */
4300         memset(&request, 0, sizeof(request));
4301         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4302         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4303                 &request.header.iu_length);
4304         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4305         put_unaligned_le16(event_queue->oq_id,
4306                 &request.data.create_operational_oq.queue_id);
4307         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4308                 &request.data.create_operational_oq.element_array_addr);
4309         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4310                 &request.data.create_operational_oq.pi_addr);
4311         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4312                 &request.data.create_operational_oq.num_elements);
4313         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4314                 &request.data.create_operational_oq.element_length);
4315         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4316         put_unaligned_le16(event_queue->int_msg_num,
4317                 &request.data.create_operational_oq.int_msg_num);
4318
4319         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4320                 &response);
4321         if (rc)
4322                 return rc;
4323
4324         event_queue->oq_ci = ctrl_info->iomem_base +
4325                 PQI_DEVICE_REGISTERS_OFFSET +
4326                 get_unaligned_le64(
4327                         &response.data.create_operational_oq.oq_ci_offset);
4328
4329         return 0;
4330 }
4331
4332 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4333         unsigned int group_number)
4334 {
4335         int rc;
4336         struct pqi_queue_group *queue_group;
4337         struct pqi_general_admin_request request;
4338         struct pqi_general_admin_response response;
4339
4340         queue_group = &ctrl_info->queue_groups[group_number];
4341
4342         /*
4343          * Create IQ (Inbound Queue - host to device queue) for
4344          * RAID path.
4345          */
4346         memset(&request, 0, sizeof(request));
4347         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4348         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4349                 &request.header.iu_length);
4350         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4351         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4352                 &request.data.create_operational_iq.queue_id);
4353         put_unaligned_le64(
4354                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4355                 &request.data.create_operational_iq.element_array_addr);
4356         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4357                 &request.data.create_operational_iq.ci_addr);
4358         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4359                 &request.data.create_operational_iq.num_elements);
4360         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4361                 &request.data.create_operational_iq.element_length);
4362         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4363
4364         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4365                 &response);
4366         if (rc) {
4367                 dev_err(&ctrl_info->pci_dev->dev,
4368                         "error creating inbound RAID queue\n");
4369                 return rc;
4370         }
4371
4372         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4373                 PQI_DEVICE_REGISTERS_OFFSET +
4374                 get_unaligned_le64(
4375                         &response.data.create_operational_iq.iq_pi_offset);
4376
4377         /*
4378          * Create IQ (Inbound Queue - host to device queue) for
4379          * Advanced I/O (AIO) path.
4380          */
4381         memset(&request, 0, sizeof(request));
4382         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4383         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4384                 &request.header.iu_length);
4385         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4386         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4387                 &request.data.create_operational_iq.queue_id);
4388         put_unaligned_le64((u64)queue_group->
4389                 iq_element_array_bus_addr[AIO_PATH],
4390                 &request.data.create_operational_iq.element_array_addr);
4391         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4392                 &request.data.create_operational_iq.ci_addr);
4393         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4394                 &request.data.create_operational_iq.num_elements);
4395         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4396                 &request.data.create_operational_iq.element_length);
4397         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4398
4399         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4400                 &response);
4401         if (rc) {
4402                 dev_err(&ctrl_info->pci_dev->dev,
4403                         "error creating inbound AIO queue\n");
4404                 return rc;
4405         }
4406
4407         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4408                 PQI_DEVICE_REGISTERS_OFFSET +
4409                 get_unaligned_le64(
4410                         &response.data.create_operational_iq.iq_pi_offset);
4411
4412         /*
4413          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4414          * assumed to be for RAID path I/O unless we change the queue's
4415          * property.
4416          */
4417         memset(&request, 0, sizeof(request));
4418         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4419         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4420                 &request.header.iu_length);
4421         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4422         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4423                 &request.data.change_operational_iq_properties.queue_id);
4424         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4425                 &request.data.change_operational_iq_properties.vendor_specific);
4426
4427         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4428                 &response);
4429         if (rc) {
4430                 dev_err(&ctrl_info->pci_dev->dev,
4431                         "error changing queue property\n");
4432                 return rc;
4433         }
4434
4435         /*
4436          * Create OQ (Outbound Queue - device to host queue).
4437          */
4438         memset(&request, 0, sizeof(request));
4439         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4440         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4441                 &request.header.iu_length);
4442         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4443         put_unaligned_le16(queue_group->oq_id,
4444                 &request.data.create_operational_oq.queue_id);
4445         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4446                 &request.data.create_operational_oq.element_array_addr);
4447         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4448                 &request.data.create_operational_oq.pi_addr);
4449         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4450                 &request.data.create_operational_oq.num_elements);
4451         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4452                 &request.data.create_operational_oq.element_length);
4453         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4454         put_unaligned_le16(queue_group->int_msg_num,
4455                 &request.data.create_operational_oq.int_msg_num);
4456
4457         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4458                 &response);
4459         if (rc) {
4460                 dev_err(&ctrl_info->pci_dev->dev,
4461                         "error creating outbound queue\n");
4462                 return rc;
4463         }
4464
4465         queue_group->oq_ci = ctrl_info->iomem_base +
4466                 PQI_DEVICE_REGISTERS_OFFSET +
4467                 get_unaligned_le64(
4468                         &response.data.create_operational_oq.oq_ci_offset);
4469
4470         return 0;
4471 }
4472
4473 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4474 {
4475         int rc;
4476         unsigned int i;
4477
4478         rc = pqi_create_event_queue(ctrl_info);
4479         if (rc) {
4480                 dev_err(&ctrl_info->pci_dev->dev,
4481                         "error creating event queue\n");
4482                 return rc;
4483         }
4484
4485         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4486                 rc = pqi_create_queue_group(ctrl_info, i);
4487                 if (rc) {
4488                         dev_err(&ctrl_info->pci_dev->dev,
4489                                 "error creating queue group number %u/%u\n",
4490                                 i, ctrl_info->num_queue_groups);
4491                         return rc;
4492                 }
4493         }
4494
4495         return 0;
4496 }
4497
4498 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4499         (offsetof(struct pqi_event_config, descriptors) + \
4500         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4501
4502 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4503         bool enable_events)
4504 {
4505         int rc;
4506         unsigned int i;
4507         struct pqi_event_config *event_config;
4508         struct pqi_event_descriptor *event_descriptor;
4509         struct pqi_general_management_request request;
4510
4511         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4512                 GFP_KERNEL);
4513         if (!event_config)
4514                 return -ENOMEM;
4515
4516         memset(&request, 0, sizeof(request));
4517
4518         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4519         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4520                 data.report_event_configuration.sg_descriptors[1]) -
4521                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4522         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4523                 &request.data.report_event_configuration.buffer_length);
4524
4525         rc = pqi_map_single(ctrl_info->pci_dev,
4526                 request.data.report_event_configuration.sg_descriptors,
4527                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4528                 DMA_FROM_DEVICE);
4529         if (rc)
4530                 goto out;
4531
4532         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4533                 0, NULL, NO_TIMEOUT);
4534
4535         pqi_pci_unmap(ctrl_info->pci_dev,
4536                 request.data.report_event_configuration.sg_descriptors, 1,
4537                 DMA_FROM_DEVICE);
4538
4539         if (rc)
4540                 goto out;
4541
4542         for (i = 0; i < event_config->num_event_descriptors; i++) {
4543                 event_descriptor = &event_config->descriptors[i];
4544                 if (enable_events &&
4545                         pqi_is_supported_event(event_descriptor->event_type))
4546                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4547                                         &event_descriptor->oq_id);
4548                 else
4549                         put_unaligned_le16(0, &event_descriptor->oq_id);
4550         }
4551
4552         memset(&request, 0, sizeof(request));
4553
4554         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4555         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4556                 data.report_event_configuration.sg_descriptors[1]) -
4557                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4558         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4559                 &request.data.report_event_configuration.buffer_length);
4560
4561         rc = pqi_map_single(ctrl_info->pci_dev,
4562                 request.data.report_event_configuration.sg_descriptors,
4563                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4564                 DMA_TO_DEVICE);
4565         if (rc)
4566                 goto out;
4567
4568         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4569                 NULL, NO_TIMEOUT);
4570
4571         pqi_pci_unmap(ctrl_info->pci_dev,
4572                 request.data.report_event_configuration.sg_descriptors, 1,
4573                 DMA_TO_DEVICE);
4574
4575 out:
4576         kfree(event_config);
4577
4578         return rc;
4579 }
4580
4581 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4582 {
4583         return pqi_configure_events(ctrl_info, true);
4584 }
4585
4586 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4587 {
4588         return pqi_configure_events(ctrl_info, false);
4589 }
4590
4591 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4592 {
4593         unsigned int i;
4594         struct device *dev;
4595         size_t sg_chain_buffer_length;
4596         struct pqi_io_request *io_request;
4597
4598         if (!ctrl_info->io_request_pool)
4599                 return;
4600
4601         dev = &ctrl_info->pci_dev->dev;
4602         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4603         io_request = ctrl_info->io_request_pool;
4604
4605         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4606                 kfree(io_request->iu);
4607                 if (!io_request->sg_chain_buffer)
4608                         break;
4609                 dma_free_coherent(dev, sg_chain_buffer_length,
4610                         io_request->sg_chain_buffer,
4611                         io_request->sg_chain_buffer_dma_handle);
4612                 io_request++;
4613         }
4614
4615         kfree(ctrl_info->io_request_pool);
4616         ctrl_info->io_request_pool = NULL;
4617 }
4618
4619 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4620 {
4621
4622         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
4623                                      ctrl_info->error_buffer_length,
4624                                      &ctrl_info->error_buffer_dma_handle,
4625                                      GFP_KERNEL);
4626         if (!ctrl_info->error_buffer)
4627                 return -ENOMEM;
4628
4629         return 0;
4630 }
4631
4632 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4633 {
4634         unsigned int i;
4635         void *sg_chain_buffer;
4636         size_t sg_chain_buffer_length;
4637         dma_addr_t sg_chain_buffer_dma_handle;
4638         struct device *dev;
4639         struct pqi_io_request *io_request;
4640
4641         ctrl_info->io_request_pool =
4642                 kcalloc(ctrl_info->max_io_slots,
4643                         sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4644
4645         if (!ctrl_info->io_request_pool) {
4646                 dev_err(&ctrl_info->pci_dev->dev,
4647                         "failed to allocate I/O request pool\n");
4648                 goto error;
4649         }
4650
4651         dev = &ctrl_info->pci_dev->dev;
4652         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4653         io_request = ctrl_info->io_request_pool;
4654
4655         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4656                 io_request->iu =
4657                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4658
4659                 if (!io_request->iu) {
4660                         dev_err(&ctrl_info->pci_dev->dev,
4661                                 "failed to allocate IU buffers\n");
4662                         goto error;
4663                 }
4664
4665                 sg_chain_buffer = dma_alloc_coherent(dev,
4666                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4667                         GFP_KERNEL);
4668
4669                 if (!sg_chain_buffer) {
4670                         dev_err(&ctrl_info->pci_dev->dev,
4671                                 "failed to allocate PQI scatter-gather chain buffers\n");
4672                         goto error;
4673                 }
4674
4675                 io_request->index = i;
4676                 io_request->sg_chain_buffer = sg_chain_buffer;
4677                 io_request->sg_chain_buffer_dma_handle =
4678                         sg_chain_buffer_dma_handle;
4679                 io_request++;
4680         }
4681
4682         return 0;
4683
4684 error:
4685         pqi_free_all_io_requests(ctrl_info);
4686
4687         return -ENOMEM;
4688 }
4689
4690 /*
4691  * Calculate required resources that are sized based on max. outstanding
4692  * requests and max. transfer size.
4693  */
4694
4695 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4696 {
4697         u32 max_transfer_size;
4698         u32 max_sg_entries;
4699
4700         ctrl_info->scsi_ml_can_queue =
4701                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4702         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4703
4704         ctrl_info->error_buffer_length =
4705                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4706
4707         if (reset_devices)
4708                 max_transfer_size = min(ctrl_info->max_transfer_size,
4709                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4710         else
4711                 max_transfer_size = min(ctrl_info->max_transfer_size,
4712                         PQI_MAX_TRANSFER_SIZE);
4713
4714         max_sg_entries = max_transfer_size / PAGE_SIZE;
4715
4716         /* +1 to cover when the buffer is not page-aligned. */
4717         max_sg_entries++;
4718
4719         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4720
4721         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4722
4723         ctrl_info->sg_chain_buffer_length =
4724                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4725                 PQI_EXTRA_SGL_MEMORY;
4726         ctrl_info->sg_tablesize = max_sg_entries;
4727         ctrl_info->max_sectors = max_transfer_size / 512;
4728 }
4729
4730 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4731 {
4732         int num_queue_groups;
4733         u16 num_elements_per_iq;
4734         u16 num_elements_per_oq;
4735
4736         if (reset_devices) {
4737                 num_queue_groups = 1;
4738         } else {
4739                 int num_cpus;
4740                 int max_queue_groups;
4741
4742                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4743                         ctrl_info->max_outbound_queues - 1);
4744                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4745
4746                 num_cpus = num_online_cpus();
4747                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4748                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4749         }
4750
4751         ctrl_info->num_queue_groups = num_queue_groups;
4752         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4753
4754         /*
4755          * Make sure that the max. inbound IU length is an even multiple
4756          * of our inbound element length.
4757          */
4758         ctrl_info->max_inbound_iu_length =
4759                 (ctrl_info->max_inbound_iu_length_per_firmware /
4760                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4761                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4762
4763         num_elements_per_iq =
4764                 (ctrl_info->max_inbound_iu_length /
4765                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4766
4767         /* Add one because one element in each queue is unusable. */
4768         num_elements_per_iq++;
4769
4770         num_elements_per_iq = min(num_elements_per_iq,
4771                 ctrl_info->max_elements_per_iq);
4772
4773         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4774         num_elements_per_oq = min(num_elements_per_oq,
4775                 ctrl_info->max_elements_per_oq);
4776
4777         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4778         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4779
4780         ctrl_info->max_sg_per_iu =
4781                 ((ctrl_info->max_inbound_iu_length -
4782                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4783                 sizeof(struct pqi_sg_descriptor)) +
4784                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4785 }
4786
4787 static inline void pqi_set_sg_descriptor(
4788         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4789 {
4790         u64 address = (u64)sg_dma_address(sg);
4791         unsigned int length = sg_dma_len(sg);
4792
4793         put_unaligned_le64(address, &sg_descriptor->address);
4794         put_unaligned_le32(length, &sg_descriptor->length);
4795         put_unaligned_le32(0, &sg_descriptor->flags);
4796 }
4797
4798 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4799         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4800         struct pqi_io_request *io_request)
4801 {
4802         int i;
4803         u16 iu_length;
4804         int sg_count;
4805         bool chained;
4806         unsigned int num_sg_in_iu;
4807         unsigned int max_sg_per_iu;
4808         struct scatterlist *sg;
4809         struct pqi_sg_descriptor *sg_descriptor;
4810
4811         sg_count = scsi_dma_map(scmd);
4812         if (sg_count < 0)
4813                 return sg_count;
4814
4815         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4816                 PQI_REQUEST_HEADER_LENGTH;
4817
4818         if (sg_count == 0)
4819                 goto out;
4820
4821         sg = scsi_sglist(scmd);
4822         sg_descriptor = request->sg_descriptors;
4823         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4824         chained = false;
4825         num_sg_in_iu = 0;
4826         i = 0;
4827
4828         while (1) {
4829                 pqi_set_sg_descriptor(sg_descriptor, sg);
4830                 if (!chained)
4831                         num_sg_in_iu++;
4832                 i++;
4833                 if (i == sg_count)
4834                         break;
4835                 sg_descriptor++;
4836                 if (i == max_sg_per_iu) {
4837                         put_unaligned_le64(
4838                                 (u64)io_request->sg_chain_buffer_dma_handle,
4839                                 &sg_descriptor->address);
4840                         put_unaligned_le32((sg_count - num_sg_in_iu)
4841                                 * sizeof(*sg_descriptor),
4842                                 &sg_descriptor->length);
4843                         put_unaligned_le32(CISS_SG_CHAIN,
4844                                 &sg_descriptor->flags);
4845                         chained = true;
4846                         num_sg_in_iu++;
4847                         sg_descriptor = io_request->sg_chain_buffer;
4848                 }
4849                 sg = sg_next(sg);
4850         }
4851
4852         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4853         request->partial = chained;
4854         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4855
4856 out:
4857         put_unaligned_le16(iu_length, &request->header.iu_length);
4858
4859         return 0;
4860 }
4861
4862 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4863         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4864         struct pqi_io_request *io_request)
4865 {
4866         int i;
4867         u16 iu_length;
4868         int sg_count;
4869         bool chained;
4870         unsigned int num_sg_in_iu;
4871         unsigned int max_sg_per_iu;
4872         struct scatterlist *sg;
4873         struct pqi_sg_descriptor *sg_descriptor;
4874
4875         sg_count = scsi_dma_map(scmd);
4876         if (sg_count < 0)
4877                 return sg_count;
4878
4879         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4880                 PQI_REQUEST_HEADER_LENGTH;
4881         num_sg_in_iu = 0;
4882
4883         if (sg_count == 0)
4884                 goto out;
4885
4886         sg = scsi_sglist(scmd);
4887         sg_descriptor = request->sg_descriptors;
4888         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4889         chained = false;
4890         i = 0;
4891
4892         while (1) {
4893                 pqi_set_sg_descriptor(sg_descriptor, sg);
4894                 if (!chained)
4895                         num_sg_in_iu++;
4896                 i++;
4897                 if (i == sg_count)
4898                         break;
4899                 sg_descriptor++;
4900                 if (i == max_sg_per_iu) {
4901                         put_unaligned_le64(
4902                                 (u64)io_request->sg_chain_buffer_dma_handle,
4903                                 &sg_descriptor->address);
4904                         put_unaligned_le32((sg_count - num_sg_in_iu)
4905                                 * sizeof(*sg_descriptor),
4906                                 &sg_descriptor->length);
4907                         put_unaligned_le32(CISS_SG_CHAIN,
4908                                 &sg_descriptor->flags);
4909                         chained = true;
4910                         num_sg_in_iu++;
4911                         sg_descriptor = io_request->sg_chain_buffer;
4912                 }
4913                 sg = sg_next(sg);
4914         }
4915
4916         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4917         request->partial = chained;
4918         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4919
4920 out:
4921         put_unaligned_le16(iu_length, &request->header.iu_length);
4922         request->num_sg_descriptors = num_sg_in_iu;
4923
4924         return 0;
4925 }
4926
4927 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4928         void *context)
4929 {
4930         struct scsi_cmnd *scmd;
4931
4932         scmd = io_request->scmd;
4933         pqi_free_io_request(io_request);
4934         scsi_dma_unmap(scmd);
4935         pqi_scsi_done(scmd);
4936 }
4937
4938 static int pqi_raid_submit_scsi_cmd_with_io_request(
4939         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4940         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4941         struct pqi_queue_group *queue_group)
4942 {
4943         int rc;
4944         size_t cdb_length;
4945         struct pqi_raid_path_request *request;
4946
4947         io_request->io_complete_callback = pqi_raid_io_complete;
4948         io_request->scmd = scmd;
4949
4950         request = io_request->iu;
4951         memset(request, 0,
4952                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4953
4954         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4955         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4956         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4957         put_unaligned_le16(io_request->index, &request->request_id);
4958         request->error_index = request->request_id;
4959         memcpy(request->lun_number, device->scsi3addr,
4960                 sizeof(request->lun_number));
4961
4962         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4963         memcpy(request->cdb, scmd->cmnd, cdb_length);
4964
4965         switch (cdb_length) {
4966         case 6:
4967         case 10:
4968         case 12:
4969         case 16:
4970                 /* No bytes in the Additional CDB bytes field */
4971                 request->additional_cdb_bytes_usage =
4972                         SOP_ADDITIONAL_CDB_BYTES_0;
4973                 break;
4974         case 20:
4975                 /* 4 bytes in the Additional cdb field */
4976                 request->additional_cdb_bytes_usage =
4977                         SOP_ADDITIONAL_CDB_BYTES_4;
4978                 break;
4979         case 24:
4980                 /* 8 bytes in the Additional cdb field */
4981                 request->additional_cdb_bytes_usage =
4982                         SOP_ADDITIONAL_CDB_BYTES_8;
4983                 break;
4984         case 28:
4985                 /* 12 bytes in the Additional cdb field */
4986                 request->additional_cdb_bytes_usage =
4987                         SOP_ADDITIONAL_CDB_BYTES_12;
4988                 break;
4989         case 32:
4990         default:
4991                 /* 16 bytes in the Additional cdb field */
4992                 request->additional_cdb_bytes_usage =
4993                         SOP_ADDITIONAL_CDB_BYTES_16;
4994                 break;
4995         }
4996
4997         switch (scmd->sc_data_direction) {
4998         case DMA_TO_DEVICE:
4999                 request->data_direction = SOP_READ_FLAG;
5000                 break;
5001         case DMA_FROM_DEVICE:
5002                 request->data_direction = SOP_WRITE_FLAG;
5003                 break;
5004         case DMA_NONE:
5005                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5006                 break;
5007         case DMA_BIDIRECTIONAL:
5008                 request->data_direction = SOP_BIDIRECTIONAL;
5009                 break;
5010         default:
5011                 dev_err(&ctrl_info->pci_dev->dev,
5012                         "unknown data direction: %d\n",
5013                         scmd->sc_data_direction);
5014                 break;
5015         }
5016
5017         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5018         if (rc) {
5019                 pqi_free_io_request(io_request);
5020                 return SCSI_MLQUEUE_HOST_BUSY;
5021         }
5022
5023         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5024
5025         return 0;
5026 }
5027
5028 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5029         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5030         struct pqi_queue_group *queue_group)
5031 {
5032         struct pqi_io_request *io_request;
5033
5034         io_request = pqi_alloc_io_request(ctrl_info);
5035
5036         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5037                 device, scmd, queue_group);
5038 }
5039
5040 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
5041 {
5042         if (!pqi_ctrl_blocked(ctrl_info))
5043                 schedule_work(&ctrl_info->raid_bypass_retry_work);
5044 }
5045
5046 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5047 {
5048         struct scsi_cmnd *scmd;
5049         struct pqi_scsi_dev *device;
5050         struct pqi_ctrl_info *ctrl_info;
5051
5052         if (!io_request->raid_bypass)
5053                 return false;
5054
5055         scmd = io_request->scmd;
5056         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5057                 return false;
5058         if (host_byte(scmd->result) == DID_NO_CONNECT)
5059                 return false;
5060
5061         device = scmd->device->hostdata;
5062         if (pqi_device_offline(device))
5063                 return false;
5064
5065         ctrl_info = shost_to_hba(scmd->device->host);
5066         if (pqi_ctrl_offline(ctrl_info))
5067                 return false;
5068
5069         return true;
5070 }
5071
5072 static inline void pqi_add_to_raid_bypass_retry_list(
5073         struct pqi_ctrl_info *ctrl_info,
5074         struct pqi_io_request *io_request, bool at_head)
5075 {
5076         unsigned long flags;
5077
5078         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5079         if (at_head)
5080                 list_add(&io_request->request_list_entry,
5081                         &ctrl_info->raid_bypass_retry_list);
5082         else
5083                 list_add_tail(&io_request->request_list_entry,
5084                         &ctrl_info->raid_bypass_retry_list);
5085         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5086 }
5087
5088 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
5089         void *context)
5090 {
5091         struct scsi_cmnd *scmd;
5092
5093         scmd = io_request->scmd;
5094         pqi_free_io_request(io_request);
5095         pqi_scsi_done(scmd);
5096 }
5097
5098 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
5099 {
5100         struct scsi_cmnd *scmd;
5101         struct pqi_ctrl_info *ctrl_info;
5102
5103         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
5104         scmd = io_request->scmd;
5105         scmd->result = 0;
5106         ctrl_info = shost_to_hba(scmd->device->host);
5107
5108         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
5109         pqi_schedule_bypass_retry(ctrl_info);
5110 }
5111
5112 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
5113 {
5114         struct scsi_cmnd *scmd;
5115         struct pqi_scsi_dev *device;
5116         struct pqi_ctrl_info *ctrl_info;
5117         struct pqi_queue_group *queue_group;
5118
5119         scmd = io_request->scmd;
5120         device = scmd->device->hostdata;
5121         if (pqi_device_in_reset(device)) {
5122                 pqi_free_io_request(io_request);
5123                 set_host_byte(scmd, DID_RESET);
5124                 pqi_scsi_done(scmd);
5125                 return 0;
5126         }
5127
5128         ctrl_info = shost_to_hba(scmd->device->host);
5129         queue_group = io_request->queue_group;
5130
5131         pqi_reinit_io_request(io_request);
5132
5133         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5134                 device, scmd, queue_group);
5135 }
5136
5137 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
5138         struct pqi_ctrl_info *ctrl_info)
5139 {
5140         unsigned long flags;
5141         struct pqi_io_request *io_request;
5142
5143         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5144         io_request = list_first_entry_or_null(
5145                 &ctrl_info->raid_bypass_retry_list,
5146                 struct pqi_io_request, request_list_entry);
5147         if (io_request)
5148                 list_del(&io_request->request_list_entry);
5149         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5150
5151         return io_request;
5152 }
5153
5154 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
5155 {
5156         int rc;
5157         struct pqi_io_request *io_request;
5158
5159         pqi_ctrl_busy(ctrl_info);
5160
5161         while (1) {
5162                 if (pqi_ctrl_blocked(ctrl_info))
5163                         break;
5164                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
5165                 if (!io_request)
5166                         break;
5167                 rc = pqi_retry_raid_bypass(io_request);
5168                 if (rc) {
5169                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
5170                                 true);
5171                         pqi_schedule_bypass_retry(ctrl_info);
5172                         break;
5173                 }
5174         }
5175
5176         pqi_ctrl_unbusy(ctrl_info);
5177 }
5178
5179 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
5180 {
5181         struct pqi_ctrl_info *ctrl_info;
5182
5183         ctrl_info = container_of(work, struct pqi_ctrl_info,
5184                 raid_bypass_retry_work);
5185         pqi_retry_raid_bypass_requests(ctrl_info);
5186 }
5187
5188 static void pqi_clear_all_queued_raid_bypass_retries(
5189         struct pqi_ctrl_info *ctrl_info)
5190 {
5191         unsigned long flags;
5192
5193         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5194         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
5195         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5196 }
5197
5198 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5199         void *context)
5200 {
5201         struct scsi_cmnd *scmd;
5202
5203         scmd = io_request->scmd;
5204         scsi_dma_unmap(scmd);
5205         if (io_request->status == -EAGAIN)
5206                 set_host_byte(scmd, DID_IMM_RETRY);
5207         else if (pqi_raid_bypass_retry_needed(io_request)) {
5208                 pqi_queue_raid_bypass_retry(io_request);
5209                 return;
5210         }
5211         pqi_free_io_request(io_request);
5212         pqi_scsi_done(scmd);
5213 }
5214
5215 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5216         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5217         struct pqi_queue_group *queue_group)
5218 {
5219         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5220                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
5221 }
5222
5223 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5224         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5225         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5226         struct pqi_encryption_info *encryption_info, bool raid_bypass)
5227 {
5228         int rc;
5229         struct pqi_io_request *io_request;
5230         struct pqi_aio_path_request *request;
5231
5232         io_request = pqi_alloc_io_request(ctrl_info);
5233         io_request->io_complete_callback = pqi_aio_io_complete;
5234         io_request->scmd = scmd;
5235         io_request->raid_bypass = raid_bypass;
5236
5237         request = io_request->iu;
5238         memset(request, 0,
5239                 offsetof(struct pqi_raid_path_request, sg_descriptors));
5240
5241         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5242         put_unaligned_le32(aio_handle, &request->nexus_id);
5243         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5244         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5245         put_unaligned_le16(io_request->index, &request->request_id);
5246         request->error_index = request->request_id;
5247         if (cdb_length > sizeof(request->cdb))
5248                 cdb_length = sizeof(request->cdb);
5249         request->cdb_length = cdb_length;
5250         memcpy(request->cdb, cdb, cdb_length);
5251
5252         switch (scmd->sc_data_direction) {
5253         case DMA_TO_DEVICE:
5254                 request->data_direction = SOP_READ_FLAG;
5255                 break;
5256         case DMA_FROM_DEVICE:
5257                 request->data_direction = SOP_WRITE_FLAG;
5258                 break;
5259         case DMA_NONE:
5260                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5261                 break;
5262         case DMA_BIDIRECTIONAL:
5263                 request->data_direction = SOP_BIDIRECTIONAL;
5264                 break;
5265         default:
5266                 dev_err(&ctrl_info->pci_dev->dev,
5267                         "unknown data direction: %d\n",
5268                         scmd->sc_data_direction);
5269                 break;
5270         }
5271
5272         if (encryption_info) {
5273                 request->encryption_enable = true;
5274                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5275                         &request->data_encryption_key_index);
5276                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5277                         &request->encrypt_tweak_lower);
5278                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5279                         &request->encrypt_tweak_upper);
5280         }
5281
5282         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5283         if (rc) {
5284                 pqi_free_io_request(io_request);
5285                 return SCSI_MLQUEUE_HOST_BUSY;
5286         }
5287
5288         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5289
5290         return 0;
5291 }
5292
5293 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5294         struct scsi_cmnd *scmd)
5295 {
5296         u16 hw_queue;
5297
5298         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
5299         if (hw_queue > ctrl_info->max_hw_queue_index)
5300                 hw_queue = 0;
5301
5302         return hw_queue;
5303 }
5304
5305 /*
5306  * This function gets called just before we hand the completed SCSI request
5307  * back to the SML.
5308  */
5309
5310 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5311 {
5312         struct pqi_scsi_dev *device;
5313
5314         if (!scmd->device) {
5315                 set_host_byte(scmd, DID_NO_CONNECT);
5316                 return;
5317         }
5318
5319         device = scmd->device->hostdata;
5320         if (!device) {
5321                 set_host_byte(scmd, DID_NO_CONNECT);
5322                 return;
5323         }
5324
5325         atomic_dec(&device->scsi_cmds_outstanding);
5326 }
5327
5328 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
5329         struct scsi_cmnd *scmd)
5330 {
5331         int rc;
5332         struct pqi_ctrl_info *ctrl_info;
5333         struct pqi_scsi_dev *device;
5334         u16 hw_queue;
5335         struct pqi_queue_group *queue_group;
5336         bool raid_bypassed;
5337
5338         device = scmd->device->hostdata;
5339         ctrl_info = shost_to_hba(shost);
5340
5341         if (!device) {
5342                 set_host_byte(scmd, DID_NO_CONNECT);
5343                 pqi_scsi_done(scmd);
5344                 return 0;
5345         }
5346
5347         atomic_inc(&device->scsi_cmds_outstanding);
5348
5349         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
5350                 set_host_byte(scmd, DID_NO_CONNECT);
5351                 pqi_scsi_done(scmd);
5352                 return 0;
5353         }
5354
5355         pqi_ctrl_busy(ctrl_info);
5356         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device) ||
5357             pqi_ctrl_in_ofa(ctrl_info) || pqi_ctrl_in_shutdown(ctrl_info)) {
5358                 rc = SCSI_MLQUEUE_HOST_BUSY;
5359                 goto out;
5360         }
5361
5362         /*
5363          * This is necessary because the SML doesn't zero out this field during
5364          * error recovery.
5365          */
5366         scmd->result = 0;
5367
5368         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5369         queue_group = &ctrl_info->queue_groups[hw_queue];
5370
5371         if (pqi_is_logical_device(device)) {
5372                 raid_bypassed = false;
5373                 if (device->raid_bypass_enabled &&
5374                         !blk_rq_is_passthrough(scmd->request)) {
5375                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5376                                 scmd, queue_group);
5377                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
5378                                 raid_bypassed = true;
5379                                 atomic_inc(&device->raid_bypass_cnt);
5380                         }
5381                 }
5382                 if (!raid_bypassed)
5383                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5384         } else {
5385                 if (device->aio_enabled)
5386                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5387                 else
5388                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
5389         }
5390
5391 out:
5392         pqi_ctrl_unbusy(ctrl_info);
5393         if (rc)
5394                 atomic_dec(&device->scsi_cmds_outstanding);
5395
5396         return rc;
5397 }
5398
5399 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5400         struct pqi_queue_group *queue_group)
5401 {
5402         unsigned int path;
5403         unsigned long flags;
5404         bool list_is_empty;
5405
5406         for (path = 0; path < 2; path++) {
5407                 while (1) {
5408                         spin_lock_irqsave(
5409                                 &queue_group->submit_lock[path], flags);
5410                         list_is_empty =
5411                                 list_empty(&queue_group->request_list[path]);
5412                         spin_unlock_irqrestore(
5413                                 &queue_group->submit_lock[path], flags);
5414                         if (list_is_empty)
5415                                 break;
5416                         pqi_check_ctrl_health(ctrl_info);
5417                         if (pqi_ctrl_offline(ctrl_info))
5418                                 return -ENXIO;
5419                         usleep_range(1000, 2000);
5420                 }
5421         }
5422
5423         return 0;
5424 }
5425
5426 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5427 {
5428         int rc;
5429         unsigned int i;
5430         unsigned int path;
5431         struct pqi_queue_group *queue_group;
5432         pqi_index_t iq_pi;
5433         pqi_index_t iq_ci;
5434
5435         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5436                 queue_group = &ctrl_info->queue_groups[i];
5437
5438                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5439                 if (rc)
5440                         return rc;
5441
5442                 for (path = 0; path < 2; path++) {
5443                         iq_pi = queue_group->iq_pi_copy[path];
5444
5445                         while (1) {
5446                                 iq_ci = readl(queue_group->iq_ci[path]);
5447                                 if (iq_ci == iq_pi)
5448                                         break;
5449                                 pqi_check_ctrl_health(ctrl_info);
5450                                 if (pqi_ctrl_offline(ctrl_info))
5451                                         return -ENXIO;
5452                                 usleep_range(1000, 2000);
5453                         }
5454                 }
5455         }
5456
5457         return 0;
5458 }
5459
5460 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5461         struct pqi_scsi_dev *device)
5462 {
5463         unsigned int i;
5464         unsigned int path;
5465         struct pqi_queue_group *queue_group;
5466         unsigned long flags;
5467         struct pqi_io_request *io_request;
5468         struct pqi_io_request *next;
5469         struct scsi_cmnd *scmd;
5470         struct pqi_scsi_dev *scsi_device;
5471
5472         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5473                 queue_group = &ctrl_info->queue_groups[i];
5474
5475                 for (path = 0; path < 2; path++) {
5476                         spin_lock_irqsave(
5477                                 &queue_group->submit_lock[path], flags);
5478
5479                         list_for_each_entry_safe(io_request, next,
5480                                 &queue_group->request_list[path],
5481                                 request_list_entry) {
5482                                 scmd = io_request->scmd;
5483                                 if (!scmd)
5484                                         continue;
5485
5486                                 scsi_device = scmd->device->hostdata;
5487                                 if (scsi_device != device)
5488                                         continue;
5489
5490                                 list_del(&io_request->request_list_entry);
5491                                 set_host_byte(scmd, DID_RESET);
5492                                 pqi_scsi_done(scmd);
5493                         }
5494
5495                         spin_unlock_irqrestore(
5496                                 &queue_group->submit_lock[path], flags);
5497                 }
5498         }
5499 }
5500
5501 static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info)
5502 {
5503         unsigned int i;
5504         unsigned int path;
5505         struct pqi_queue_group *queue_group;
5506         unsigned long flags;
5507         struct pqi_io_request *io_request;
5508         struct pqi_io_request *next;
5509         struct scsi_cmnd *scmd;
5510
5511         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5512                 queue_group = &ctrl_info->queue_groups[i];
5513
5514                 for (path = 0; path < 2; path++) {
5515                         spin_lock_irqsave(&queue_group->submit_lock[path],
5516                                                 flags);
5517
5518                         list_for_each_entry_safe(io_request, next,
5519                                 &queue_group->request_list[path],
5520                                 request_list_entry) {
5521
5522                                 scmd = io_request->scmd;
5523                                 if (!scmd)
5524                                         continue;
5525
5526                                 list_del(&io_request->request_list_entry);
5527                                 set_host_byte(scmd, DID_RESET);
5528                                 pqi_scsi_done(scmd);
5529                         }
5530
5531                         spin_unlock_irqrestore(
5532                                 &queue_group->submit_lock[path], flags);
5533                 }
5534         }
5535 }
5536
5537 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5538         struct pqi_scsi_dev *device, unsigned long timeout_secs)
5539 {
5540         unsigned long timeout;
5541
5542         timeout = (timeout_secs * PQI_HZ) + jiffies;
5543
5544         while (atomic_read(&device->scsi_cmds_outstanding)) {
5545                 pqi_check_ctrl_health(ctrl_info);
5546                 if (pqi_ctrl_offline(ctrl_info))
5547                         return -ENXIO;
5548                 if (timeout_secs != NO_TIMEOUT) {
5549                         if (time_after(jiffies, timeout)) {
5550                                 dev_err(&ctrl_info->pci_dev->dev,
5551                                         "timed out waiting for pending IO\n");
5552                                 return -ETIMEDOUT;
5553                         }
5554                 }
5555                 usleep_range(1000, 2000);
5556         }
5557
5558         return 0;
5559 }
5560
5561 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5562         unsigned long timeout_secs)
5563 {
5564         bool io_pending;
5565         unsigned long flags;
5566         unsigned long timeout;
5567         struct pqi_scsi_dev *device;
5568
5569         timeout = (timeout_secs * PQI_HZ) + jiffies;
5570         while (1) {
5571                 io_pending = false;
5572
5573                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5574                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5575                         scsi_device_list_entry) {
5576                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5577                                 io_pending = true;
5578                                 break;
5579                         }
5580                 }
5581                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5582                                         flags);
5583
5584                 if (!io_pending)
5585                         break;
5586
5587                 pqi_check_ctrl_health(ctrl_info);
5588                 if (pqi_ctrl_offline(ctrl_info))
5589                         return -ENXIO;
5590
5591                 if (timeout_secs != NO_TIMEOUT) {
5592                         if (time_after(jiffies, timeout)) {
5593                                 dev_err(&ctrl_info->pci_dev->dev,
5594                                         "timed out waiting for pending IO\n");
5595                                 return -ETIMEDOUT;
5596                         }
5597                 }
5598                 usleep_range(1000, 2000);
5599         }
5600
5601         return 0;
5602 }
5603
5604 static int pqi_ctrl_wait_for_pending_sync_cmds(struct pqi_ctrl_info *ctrl_info)
5605 {
5606         while (atomic_read(&ctrl_info->sync_cmds_outstanding)) {
5607                 pqi_check_ctrl_health(ctrl_info);
5608                 if (pqi_ctrl_offline(ctrl_info))
5609                         return -ENXIO;
5610                 usleep_range(1000, 2000);
5611         }
5612
5613         return 0;
5614 }
5615
5616 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5617         void *context)
5618 {
5619         struct completion *waiting = context;
5620
5621         complete(waiting);
5622 }
5623
5624 #define PQI_LUN_RESET_TIMEOUT_SECS              30
5625 #define PQI_LUN_RESET_POLL_COMPLETION_SECS      10
5626
5627 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5628         struct pqi_scsi_dev *device, struct completion *wait)
5629 {
5630         int rc;
5631
5632         while (1) {
5633                 if (wait_for_completion_io_timeout(wait,
5634                         PQI_LUN_RESET_POLL_COMPLETION_SECS * PQI_HZ)) {
5635                         rc = 0;
5636                         break;
5637                 }
5638
5639                 pqi_check_ctrl_health(ctrl_info);
5640                 if (pqi_ctrl_offline(ctrl_info)) {
5641                         rc = -ENXIO;
5642                         break;
5643                 }
5644         }
5645
5646         return rc;
5647 }
5648
5649 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5650         struct pqi_scsi_dev *device)
5651 {
5652         int rc;
5653         struct pqi_io_request *io_request;
5654         DECLARE_COMPLETION_ONSTACK(wait);
5655         struct pqi_task_management_request *request;
5656
5657         io_request = pqi_alloc_io_request(ctrl_info);
5658         io_request->io_complete_callback = pqi_lun_reset_complete;
5659         io_request->context = &wait;
5660
5661         request = io_request->iu;
5662         memset(request, 0, sizeof(*request));
5663
5664         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5665         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5666                 &request->header.iu_length);
5667         put_unaligned_le16(io_request->index, &request->request_id);
5668         memcpy(request->lun_number, device->scsi3addr,
5669                 sizeof(request->lun_number));
5670         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5671         if (ctrl_info->tmf_iu_timeout_supported)
5672                 put_unaligned_le16(PQI_LUN_RESET_TIMEOUT_SECS,
5673                                         &request->timeout);
5674
5675         pqi_start_io(ctrl_info,
5676                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5677                 io_request);
5678
5679         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5680         if (rc == 0)
5681                 rc = io_request->status;
5682
5683         pqi_free_io_request(io_request);
5684
5685         return rc;
5686 }
5687
5688 /* Performs a reset at the LUN level. */
5689
5690 #define PQI_LUN_RESET_RETRIES                   3
5691 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS      10000
5692 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS   120
5693
5694 static int _pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5695         struct pqi_scsi_dev *device)
5696 {
5697         int rc;
5698         unsigned int retries;
5699         unsigned long timeout_secs;
5700
5701         for (retries = 0;;) {
5702                 rc = pqi_lun_reset(ctrl_info, device);
5703                 if (rc == 0 || ++retries > PQI_LUN_RESET_RETRIES)
5704                         break;
5705                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
5706         }
5707
5708         timeout_secs = rc ? PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS : NO_TIMEOUT;
5709
5710         rc |= pqi_device_wait_for_pending_io(ctrl_info, device, timeout_secs);
5711
5712         return rc == 0 ? SUCCESS : FAILED;
5713 }
5714
5715 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5716         struct pqi_scsi_dev *device)
5717 {
5718         int rc;
5719
5720         mutex_lock(&ctrl_info->lun_reset_mutex);
5721
5722         pqi_ctrl_block_requests(ctrl_info);
5723         pqi_ctrl_wait_until_quiesced(ctrl_info);
5724         pqi_fail_io_queued_for_device(ctrl_info, device);
5725         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5726         pqi_device_reset_start(device);
5727         pqi_ctrl_unblock_requests(ctrl_info);
5728
5729         if (rc)
5730                 rc = FAILED;
5731         else
5732                 rc = _pqi_device_reset(ctrl_info, device);
5733
5734         pqi_device_reset_done(device);
5735
5736         mutex_unlock(&ctrl_info->lun_reset_mutex);
5737
5738         return rc;
5739 }
5740
5741 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5742 {
5743         int rc;
5744         struct Scsi_Host *shost;
5745         struct pqi_ctrl_info *ctrl_info;
5746         struct pqi_scsi_dev *device;
5747
5748         shost = scmd->device->host;
5749         ctrl_info = shost_to_hba(shost);
5750         device = scmd->device->hostdata;
5751
5752         dev_err(&ctrl_info->pci_dev->dev,
5753                 "resetting scsi %d:%d:%d:%d\n",
5754                 shost->host_no, device->bus, device->target, device->lun);
5755
5756         pqi_check_ctrl_health(ctrl_info);
5757         if (pqi_ctrl_offline(ctrl_info) ||
5758                 pqi_device_reset_blocked(ctrl_info)) {
5759                 rc = FAILED;
5760                 goto out;
5761         }
5762
5763         pqi_wait_until_ofa_finished(ctrl_info);
5764
5765         atomic_inc(&ctrl_info->sync_cmds_outstanding);
5766         rc = pqi_device_reset(ctrl_info, device);
5767         atomic_dec(&ctrl_info->sync_cmds_outstanding);
5768
5769 out:
5770         dev_err(&ctrl_info->pci_dev->dev,
5771                 "reset of scsi %d:%d:%d:%d: %s\n",
5772                 shost->host_no, device->bus, device->target, device->lun,
5773                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5774
5775         return rc;
5776 }
5777
5778 static int pqi_slave_alloc(struct scsi_device *sdev)
5779 {
5780         struct pqi_scsi_dev *device;
5781         unsigned long flags;
5782         struct pqi_ctrl_info *ctrl_info;
5783         struct scsi_target *starget;
5784         struct sas_rphy *rphy;
5785
5786         ctrl_info = shost_to_hba(sdev->host);
5787
5788         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5789
5790         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5791                 starget = scsi_target(sdev);
5792                 rphy = target_to_rphy(starget);
5793                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5794                 if (device) {
5795                         device->target = sdev_id(sdev);
5796                         device->lun = sdev->lun;
5797                         device->target_lun_valid = true;
5798                 }
5799         } else {
5800                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5801                         sdev_id(sdev), sdev->lun);
5802         }
5803
5804         if (device) {
5805                 sdev->hostdata = device;
5806                 device->sdev = sdev;
5807                 if (device->queue_depth) {
5808                         device->advertised_queue_depth = device->queue_depth;
5809                         scsi_change_queue_depth(sdev,
5810                                 device->advertised_queue_depth);
5811                 }
5812                 if (pqi_is_logical_device(device))
5813                         pqi_disable_write_same(sdev);
5814                 else
5815                         sdev->allow_restart = 1;
5816         }
5817
5818         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5819
5820         return 0;
5821 }
5822
5823 static int pqi_map_queues(struct Scsi_Host *shost)
5824 {
5825         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5826
5827         return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
5828                                         ctrl_info->pci_dev, 0);
5829 }
5830
5831 static int pqi_slave_configure(struct scsi_device *sdev)
5832 {
5833         struct pqi_scsi_dev *device;
5834
5835         device = sdev->hostdata;
5836         device->devtype = sdev->type;
5837
5838         return 0;
5839 }
5840
5841 static void pqi_slave_destroy(struct scsi_device *sdev)
5842 {
5843         unsigned long flags;
5844         struct pqi_scsi_dev *device;
5845         struct pqi_ctrl_info *ctrl_info;
5846
5847         ctrl_info = shost_to_hba(sdev->host);
5848
5849         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5850
5851         device = sdev->hostdata;
5852         if (device) {
5853                 sdev->hostdata = NULL;
5854                 if (!list_empty(&device->scsi_device_list_entry))
5855                         list_del(&device->scsi_device_list_entry);
5856         }
5857
5858         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5859
5860         if (device) {
5861                 pqi_dev_info(ctrl_info, "removed", device);
5862                 pqi_free_device(device);
5863         }
5864 }
5865
5866 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5867 {
5868         struct pci_dev *pci_dev;
5869         u32 subsystem_vendor;
5870         u32 subsystem_device;
5871         cciss_pci_info_struct pciinfo;
5872
5873         if (!arg)
5874                 return -EINVAL;
5875
5876         pci_dev = ctrl_info->pci_dev;
5877
5878         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5879         pciinfo.bus = pci_dev->bus->number;
5880         pciinfo.dev_fn = pci_dev->devfn;
5881         subsystem_vendor = pci_dev->subsystem_vendor;
5882         subsystem_device = pci_dev->subsystem_device;
5883         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
5884
5885         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5886                 return -EFAULT;
5887
5888         return 0;
5889 }
5890
5891 static int pqi_getdrivver_ioctl(void __user *arg)
5892 {
5893         u32 version;
5894
5895         if (!arg)
5896                 return -EINVAL;
5897
5898         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5899                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5900
5901         if (copy_to_user(arg, &version, sizeof(version)))
5902                 return -EFAULT;
5903
5904         return 0;
5905 }
5906
5907 struct ciss_error_info {
5908         u8      scsi_status;
5909         int     command_status;
5910         size_t  sense_data_length;
5911 };
5912
5913 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5914         struct ciss_error_info *ciss_error_info)
5915 {
5916         int ciss_cmd_status;
5917         size_t sense_data_length;
5918
5919         switch (pqi_error_info->data_out_result) {
5920         case PQI_DATA_IN_OUT_GOOD:
5921                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5922                 break;
5923         case PQI_DATA_IN_OUT_UNDERFLOW:
5924                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5925                 break;
5926         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5927                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5928                 break;
5929         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5930         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5931         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5932         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5933         case PQI_DATA_IN_OUT_ERROR:
5934                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5935                 break;
5936         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5937         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5938         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5939         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5940         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5941         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5942         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5943         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5944         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5945         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5946                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5947                 break;
5948         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5949                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5950                 break;
5951         case PQI_DATA_IN_OUT_ABORTED:
5952                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5953                 break;
5954         case PQI_DATA_IN_OUT_TIMEOUT:
5955                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5956                 break;
5957         default:
5958                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5959                 break;
5960         }
5961
5962         sense_data_length =
5963                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5964         if (sense_data_length == 0)
5965                 sense_data_length =
5966                 get_unaligned_le16(&pqi_error_info->response_data_length);
5967         if (sense_data_length)
5968                 if (sense_data_length > sizeof(pqi_error_info->data))
5969                         sense_data_length = sizeof(pqi_error_info->data);
5970
5971         ciss_error_info->scsi_status = pqi_error_info->status;
5972         ciss_error_info->command_status = ciss_cmd_status;
5973         ciss_error_info->sense_data_length = sense_data_length;
5974 }
5975
5976 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5977 {
5978         int rc;
5979         char *kernel_buffer = NULL;
5980         u16 iu_length;
5981         size_t sense_data_length;
5982         IOCTL_Command_struct iocommand;
5983         struct pqi_raid_path_request request;
5984         struct pqi_raid_error_info pqi_error_info;
5985         struct ciss_error_info ciss_error_info;
5986
5987         if (pqi_ctrl_offline(ctrl_info))
5988                 return -ENXIO;
5989         if (!arg)
5990                 return -EINVAL;
5991         if (!capable(CAP_SYS_RAWIO))
5992                 return -EPERM;
5993         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5994                 return -EFAULT;
5995         if (iocommand.buf_size < 1 &&
5996                 iocommand.Request.Type.Direction != XFER_NONE)
5997                 return -EINVAL;
5998         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5999                 return -EINVAL;
6000         if (iocommand.Request.Type.Type != TYPE_CMD)
6001                 return -EINVAL;
6002
6003         switch (iocommand.Request.Type.Direction) {
6004         case XFER_NONE:
6005         case XFER_WRITE:
6006         case XFER_READ:
6007         case XFER_READ | XFER_WRITE:
6008                 break;
6009         default:
6010                 return -EINVAL;
6011         }
6012
6013         if (iocommand.buf_size > 0) {
6014                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
6015                 if (!kernel_buffer)
6016                         return -ENOMEM;
6017                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6018                         if (copy_from_user(kernel_buffer, iocommand.buf,
6019                                 iocommand.buf_size)) {
6020                                 rc = -EFAULT;
6021                                 goto out;
6022                         }
6023                 } else {
6024                         memset(kernel_buffer, 0, iocommand.buf_size);
6025                 }
6026         }
6027
6028         memset(&request, 0, sizeof(request));
6029
6030         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
6031         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
6032                 PQI_REQUEST_HEADER_LENGTH;
6033         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
6034                 sizeof(request.lun_number));
6035         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
6036         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
6037
6038         switch (iocommand.Request.Type.Direction) {
6039         case XFER_NONE:
6040                 request.data_direction = SOP_NO_DIRECTION_FLAG;
6041                 break;
6042         case XFER_WRITE:
6043                 request.data_direction = SOP_WRITE_FLAG;
6044                 break;
6045         case XFER_READ:
6046                 request.data_direction = SOP_READ_FLAG;
6047                 break;
6048         case XFER_READ | XFER_WRITE:
6049                 request.data_direction = SOP_BIDIRECTIONAL;
6050                 break;
6051         }
6052
6053         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6054
6055         if (iocommand.buf_size > 0) {
6056                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6057
6058                 rc = pqi_map_single(ctrl_info->pci_dev,
6059                         &request.sg_descriptors[0], kernel_buffer,
6060                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6061                 if (rc)
6062                         goto out;
6063
6064                 iu_length += sizeof(request.sg_descriptors[0]);
6065         }
6066
6067         put_unaligned_le16(iu_length, &request.header.iu_length);
6068
6069         if (ctrl_info->raid_iu_timeout_supported)
6070                 put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
6071
6072         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6073                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
6074
6075         if (iocommand.buf_size > 0)
6076                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6077                         DMA_BIDIRECTIONAL);
6078
6079         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6080
6081         if (rc == 0) {
6082                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6083                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6084                 iocommand.error_info.CommandStatus =
6085                         ciss_error_info.command_status;
6086                 sense_data_length = ciss_error_info.sense_data_length;
6087                 if (sense_data_length) {
6088                         if (sense_data_length >
6089                                 sizeof(iocommand.error_info.SenseInfo))
6090                                 sense_data_length =
6091                                         sizeof(iocommand.error_info.SenseInfo);
6092                         memcpy(iocommand.error_info.SenseInfo,
6093                                 pqi_error_info.data, sense_data_length);
6094                         iocommand.error_info.SenseLen = sense_data_length;
6095                 }
6096         }
6097
6098         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6099                 rc = -EFAULT;
6100                 goto out;
6101         }
6102
6103         if (rc == 0 && iocommand.buf_size > 0 &&
6104                 (iocommand.Request.Type.Direction & XFER_READ)) {
6105                 if (copy_to_user(iocommand.buf, kernel_buffer,
6106                         iocommand.buf_size)) {
6107                         rc = -EFAULT;
6108                 }
6109         }
6110
6111 out:
6112         kfree(kernel_buffer);
6113
6114         return rc;
6115 }
6116
6117 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6118                      void __user *arg)
6119 {
6120         int rc;
6121         struct pqi_ctrl_info *ctrl_info;
6122
6123         ctrl_info = shost_to_hba(sdev->host);
6124
6125         if (pqi_ctrl_in_ofa(ctrl_info) || pqi_ctrl_in_shutdown(ctrl_info))
6126                 return -EBUSY;
6127
6128         switch (cmd) {
6129         case CCISS_DEREGDISK:
6130         case CCISS_REGNEWDISK:
6131         case CCISS_REGNEWD:
6132                 rc = pqi_scan_scsi_devices(ctrl_info);
6133                 break;
6134         case CCISS_GETPCIINFO:
6135                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6136                 break;
6137         case CCISS_GETDRIVVER:
6138                 rc = pqi_getdrivver_ioctl(arg);
6139                 break;
6140         case CCISS_PASSTHRU:
6141                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6142                 break;
6143         default:
6144                 rc = -EINVAL;
6145                 break;
6146         }
6147
6148         return rc;
6149 }
6150
6151 static ssize_t pqi_firmware_version_show(struct device *dev,
6152         struct device_attribute *attr, char *buffer)
6153 {
6154         struct Scsi_Host *shost;
6155         struct pqi_ctrl_info *ctrl_info;
6156
6157         shost = class_to_shost(dev);
6158         ctrl_info = shost_to_hba(shost);
6159
6160         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6161 }
6162
6163 static ssize_t pqi_driver_version_show(struct device *dev,
6164         struct device_attribute *attr, char *buffer)
6165 {
6166         return snprintf(buffer, PAGE_SIZE, "%s\n",
6167                         DRIVER_VERSION BUILD_TIMESTAMP);
6168 }
6169
6170 static ssize_t pqi_serial_number_show(struct device *dev,
6171         struct device_attribute *attr, char *buffer)
6172 {
6173         struct Scsi_Host *shost;
6174         struct pqi_ctrl_info *ctrl_info;
6175
6176         shost = class_to_shost(dev);
6177         ctrl_info = shost_to_hba(shost);
6178
6179         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6180 }
6181
6182 static ssize_t pqi_model_show(struct device *dev,
6183         struct device_attribute *attr, char *buffer)
6184 {
6185         struct Scsi_Host *shost;
6186         struct pqi_ctrl_info *ctrl_info;
6187
6188         shost = class_to_shost(dev);
6189         ctrl_info = shost_to_hba(shost);
6190
6191         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6192 }
6193
6194 static ssize_t pqi_vendor_show(struct device *dev,
6195         struct device_attribute *attr, char *buffer)
6196 {
6197         struct Scsi_Host *shost;
6198         struct pqi_ctrl_info *ctrl_info;
6199
6200         shost = class_to_shost(dev);
6201         ctrl_info = shost_to_hba(shost);
6202
6203         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6204 }
6205
6206 static ssize_t pqi_host_rescan_store(struct device *dev,
6207         struct device_attribute *attr, const char *buffer, size_t count)
6208 {
6209         struct Scsi_Host *shost = class_to_shost(dev);
6210
6211         pqi_scan_start(shost);
6212
6213         return count;
6214 }
6215
6216 static ssize_t pqi_lockup_action_show(struct device *dev,
6217         struct device_attribute *attr, char *buffer)
6218 {
6219         int count = 0;
6220         unsigned int i;
6221
6222         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6223                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6224                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6225                                 "[%s] ", pqi_lockup_actions[i].name);
6226                 else
6227                         count += scnprintf(buffer + count, PAGE_SIZE - count,
6228                                 "%s ", pqi_lockup_actions[i].name);
6229         }
6230
6231         count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
6232
6233         return count;
6234 }
6235
6236 static ssize_t pqi_lockup_action_store(struct device *dev,
6237         struct device_attribute *attr, const char *buffer, size_t count)
6238 {
6239         unsigned int i;
6240         char *action_name;
6241         char action_name_buffer[32];
6242
6243         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6244         action_name = strstrip(action_name_buffer);
6245
6246         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6247                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6248                         pqi_lockup_action = pqi_lockup_actions[i].action;
6249                         return count;
6250                 }
6251         }
6252
6253         return -EINVAL;
6254 }
6255
6256 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
6257 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
6258 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
6259 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
6260 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
6261 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6262 static DEVICE_ATTR(lockup_action, 0644,
6263         pqi_lockup_action_show, pqi_lockup_action_store);
6264
6265 static struct device_attribute *pqi_shost_attrs[] = {
6266         &dev_attr_driver_version,
6267         &dev_attr_firmware_version,
6268         &dev_attr_model,
6269         &dev_attr_serial_number,
6270         &dev_attr_vendor,
6271         &dev_attr_rescan,
6272         &dev_attr_lockup_action,
6273         NULL
6274 };
6275
6276 static ssize_t pqi_unique_id_show(struct device *dev,
6277         struct device_attribute *attr, char *buffer)
6278 {
6279         struct pqi_ctrl_info *ctrl_info;
6280         struct scsi_device *sdev;
6281         struct pqi_scsi_dev *device;
6282         unsigned long flags;
6283         u8 unique_id[16];
6284
6285         sdev = to_scsi_device(dev);
6286         ctrl_info = shost_to_hba(sdev->host);
6287
6288         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6289
6290         device = sdev->hostdata;
6291         if (!device) {
6292                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6293                 return -ENODEV;
6294         }
6295
6296         if (device->is_physical_device) {
6297                 memset(unique_id, 0, 8);
6298                 memcpy(unique_id + 8, &device->wwid, sizeof(device->wwid));
6299         } else {
6300                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
6301         }
6302
6303         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6304
6305         return snprintf(buffer, PAGE_SIZE,
6306                 "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
6307                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
6308                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
6309                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
6310                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
6311 }
6312
6313 static ssize_t pqi_lunid_show(struct device *dev,
6314         struct device_attribute *attr, char *buffer)
6315 {
6316         struct pqi_ctrl_info *ctrl_info;
6317         struct scsi_device *sdev;
6318         struct pqi_scsi_dev *device;
6319         unsigned long flags;
6320         u8 lunid[8];
6321
6322         sdev = to_scsi_device(dev);
6323         ctrl_info = shost_to_hba(sdev->host);
6324
6325         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6326
6327         device = sdev->hostdata;
6328         if (!device) {
6329                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6330                 return -ENODEV;
6331         }
6332
6333         memcpy(lunid, device->scsi3addr, sizeof(lunid));
6334
6335         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6336
6337         return snprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
6338 }
6339
6340 #define MAX_PATHS       8
6341
6342 static ssize_t pqi_path_info_show(struct device *dev,
6343         struct device_attribute *attr, char *buf)
6344 {
6345         struct pqi_ctrl_info *ctrl_info;
6346         struct scsi_device *sdev;
6347         struct pqi_scsi_dev *device;
6348         unsigned long flags;
6349         int i;
6350         int output_len = 0;
6351         u8 box;
6352         u8 bay;
6353         u8 path_map_index;
6354         char *active;
6355         u8 phys_connector[2];
6356
6357         sdev = to_scsi_device(dev);
6358         ctrl_info = shost_to_hba(sdev->host);
6359
6360         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6361
6362         device = sdev->hostdata;
6363         if (!device) {
6364                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6365                 return -ENODEV;
6366         }
6367
6368         bay = device->bay;
6369         for (i = 0; i < MAX_PATHS; i++) {
6370                 path_map_index = 1 << i;
6371                 if (i == device->active_path_index)
6372                         active = "Active";
6373                 else if (device->path_map & path_map_index)
6374                         active = "Inactive";
6375                 else
6376                         continue;
6377
6378                 output_len += scnprintf(buf + output_len,
6379                                         PAGE_SIZE - output_len,
6380                                         "[%d:%d:%d:%d] %20.20s ",
6381                                         ctrl_info->scsi_host->host_no,
6382                                         device->bus, device->target,
6383                                         device->lun,
6384                                         scsi_device_type(device->devtype));
6385
6386                 if (device->devtype == TYPE_RAID ||
6387                         pqi_is_logical_device(device))
6388                         goto end_buffer;
6389
6390                 memcpy(&phys_connector, &device->phys_connector[i],
6391                         sizeof(phys_connector));
6392                 if (phys_connector[0] < '0')
6393                         phys_connector[0] = '0';
6394                 if (phys_connector[1] < '0')
6395                         phys_connector[1] = '0';
6396
6397                 output_len += scnprintf(buf + output_len,
6398                                         PAGE_SIZE - output_len,
6399                                         "PORT: %.2s ", phys_connector);
6400
6401                 box = device->box[i];
6402                 if (box != 0 && box != 0xFF)
6403                         output_len += scnprintf(buf + output_len,
6404                                                 PAGE_SIZE - output_len,
6405                                                 "BOX: %hhu ", box);
6406
6407                 if ((device->devtype == TYPE_DISK ||
6408                         device->devtype == TYPE_ZBC) &&
6409                         pqi_expose_device(device))
6410                         output_len += scnprintf(buf + output_len,
6411                                                 PAGE_SIZE - output_len,
6412                                                 "BAY: %hhu ", bay);
6413
6414 end_buffer:
6415                 output_len += scnprintf(buf + output_len,
6416                                         PAGE_SIZE - output_len,
6417                                         "%s\n", active);
6418         }
6419
6420         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6421
6422         return output_len;
6423 }
6424
6425 static ssize_t pqi_sas_address_show(struct device *dev,
6426         struct device_attribute *attr, char *buffer)
6427 {
6428         struct pqi_ctrl_info *ctrl_info;
6429         struct scsi_device *sdev;
6430         struct pqi_scsi_dev *device;
6431         unsigned long flags;
6432         u64 sas_address;
6433
6434         sdev = to_scsi_device(dev);
6435         ctrl_info = shost_to_hba(sdev->host);
6436
6437         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6438
6439         device = sdev->hostdata;
6440         if (!device || !pqi_is_device_with_sas_address(device)) {
6441                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6442                 return -ENODEV;
6443         }
6444
6445         sas_address = device->sas_address;
6446
6447         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6448
6449         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
6450 }
6451
6452 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
6453         struct device_attribute *attr, char *buffer)
6454 {
6455         struct pqi_ctrl_info *ctrl_info;
6456         struct scsi_device *sdev;
6457         struct pqi_scsi_dev *device;
6458         unsigned long flags;
6459
6460         sdev = to_scsi_device(dev);
6461         ctrl_info = shost_to_hba(sdev->host);
6462
6463         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6464
6465         device = sdev->hostdata;
6466         if (!device) {
6467                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6468                 return -ENODEV;
6469         }
6470
6471         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
6472         buffer[1] = '\n';
6473         buffer[2] = '\0';
6474
6475         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6476
6477         return 2;
6478 }
6479
6480 static ssize_t pqi_raid_level_show(struct device *dev,
6481         struct device_attribute *attr, char *buffer)
6482 {
6483         struct pqi_ctrl_info *ctrl_info;
6484         struct scsi_device *sdev;
6485         struct pqi_scsi_dev *device;
6486         unsigned long flags;
6487         char *raid_level;
6488
6489         sdev = to_scsi_device(dev);
6490         ctrl_info = shost_to_hba(sdev->host);
6491
6492         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6493
6494         device = sdev->hostdata;
6495         if (!device) {
6496                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6497                 return -ENODEV;
6498         }
6499
6500         if (pqi_is_logical_device(device))
6501                 raid_level = pqi_raid_level_to_string(device->raid_level);
6502         else
6503                 raid_level = "N/A";
6504
6505         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6506
6507         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
6508 }
6509
6510 static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
6511         struct device_attribute *attr, char *buffer)
6512 {
6513         struct pqi_ctrl_info *ctrl_info;
6514         struct scsi_device *sdev;
6515         struct pqi_scsi_dev *device;
6516         unsigned long flags;
6517         int raid_bypass_cnt;
6518
6519         sdev = to_scsi_device(dev);
6520         ctrl_info = shost_to_hba(sdev->host);
6521
6522         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6523
6524         device = sdev->hostdata;
6525         if (!device) {
6526                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6527                 return -ENODEV;
6528         }
6529
6530         raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt);
6531
6532         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6533
6534         return snprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
6535 }
6536
6537 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
6538 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
6539 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
6540 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
6541 static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
6542 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
6543 static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
6544
6545 static struct device_attribute *pqi_sdev_attrs[] = {
6546         &dev_attr_lunid,
6547         &dev_attr_unique_id,
6548         &dev_attr_path_info,
6549         &dev_attr_sas_address,
6550         &dev_attr_ssd_smart_path_enabled,
6551         &dev_attr_raid_level,
6552         &dev_attr_raid_bypass_cnt,
6553         NULL
6554 };
6555
6556 static struct scsi_host_template pqi_driver_template = {
6557         .module = THIS_MODULE,
6558         .name = DRIVER_NAME_SHORT,
6559         .proc_name = DRIVER_NAME_SHORT,
6560         .queuecommand = pqi_scsi_queue_command,
6561         .scan_start = pqi_scan_start,
6562         .scan_finished = pqi_scan_finished,
6563         .this_id = -1,
6564         .eh_device_reset_handler = pqi_eh_device_reset_handler,
6565         .ioctl = pqi_ioctl,
6566         .slave_alloc = pqi_slave_alloc,
6567         .slave_configure = pqi_slave_configure,
6568         .slave_destroy = pqi_slave_destroy,
6569         .map_queues = pqi_map_queues,
6570         .sdev_attrs = pqi_sdev_attrs,
6571         .shost_attrs = pqi_shost_attrs,
6572 };
6573
6574 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
6575 {
6576         int rc;
6577         struct Scsi_Host *shost;
6578
6579         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
6580         if (!shost) {
6581                 dev_err(&ctrl_info->pci_dev->dev,
6582                         "scsi_host_alloc failed for controller %u\n",
6583                         ctrl_info->ctrl_id);
6584                 return -ENOMEM;
6585         }
6586
6587         shost->io_port = 0;
6588         shost->n_io_port = 0;
6589         shost->this_id = -1;
6590         shost->max_channel = PQI_MAX_BUS;
6591         shost->max_cmd_len = MAX_COMMAND_SIZE;
6592         shost->max_lun = ~0;
6593         shost->max_id = ~0;
6594         shost->max_sectors = ctrl_info->max_sectors;
6595         shost->can_queue = ctrl_info->scsi_ml_can_queue;
6596         shost->cmd_per_lun = shost->can_queue;
6597         shost->sg_tablesize = ctrl_info->sg_tablesize;
6598         shost->transportt = pqi_sas_transport_template;
6599         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
6600         shost->unique_id = shost->irq;
6601         shost->nr_hw_queues = ctrl_info->num_queue_groups;
6602         shost->hostdata[0] = (unsigned long)ctrl_info;
6603
6604         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
6605         if (rc) {
6606                 dev_err(&ctrl_info->pci_dev->dev,
6607                         "scsi_add_host failed for controller %u\n",
6608                         ctrl_info->ctrl_id);
6609                 goto free_host;
6610         }
6611
6612         rc = pqi_add_sas_host(shost, ctrl_info);
6613         if (rc) {
6614                 dev_err(&ctrl_info->pci_dev->dev,
6615                         "add SAS host failed for controller %u\n",
6616                         ctrl_info->ctrl_id);
6617                 goto remove_host;
6618         }
6619
6620         ctrl_info->scsi_host = shost;
6621
6622         return 0;
6623
6624 remove_host:
6625         scsi_remove_host(shost);
6626 free_host:
6627         scsi_host_put(shost);
6628
6629         return rc;
6630 }
6631
6632 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
6633 {
6634         struct Scsi_Host *shost;
6635
6636         pqi_delete_sas_host(ctrl_info);
6637
6638         shost = ctrl_info->scsi_host;
6639         if (!shost)
6640                 return;
6641
6642         scsi_remove_host(shost);
6643         scsi_host_put(shost);
6644 }
6645
6646 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
6647 {
6648         int rc = 0;
6649         struct pqi_device_registers __iomem *pqi_registers;
6650         unsigned long timeout;
6651         unsigned int timeout_msecs;
6652         union pqi_reset_register reset_reg;
6653
6654         pqi_registers = ctrl_info->pqi_registers;
6655         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
6656         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
6657
6658         while (1) {
6659                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
6660                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
6661                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
6662                         break;
6663                 pqi_check_ctrl_health(ctrl_info);
6664                 if (pqi_ctrl_offline(ctrl_info)) {
6665                         rc = -ENXIO;
6666                         break;
6667                 }
6668                 if (time_after(jiffies, timeout)) {
6669                         rc = -ETIMEDOUT;
6670                         break;
6671                 }
6672         }
6673
6674         return rc;
6675 }
6676
6677 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
6678 {
6679         int rc;
6680         union pqi_reset_register reset_reg;
6681
6682         if (ctrl_info->pqi_reset_quiesce_supported) {
6683                 rc = sis_pqi_reset_quiesce(ctrl_info);
6684                 if (rc) {
6685                         dev_err(&ctrl_info->pci_dev->dev,
6686                                 "PQI reset failed during quiesce with error %d\n",
6687                                 rc);
6688                         return rc;
6689                 }
6690         }
6691
6692         reset_reg.all_bits = 0;
6693         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
6694         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
6695
6696         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
6697
6698         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
6699         if (rc)
6700                 dev_err(&ctrl_info->pci_dev->dev,
6701                         "PQI reset failed with error %d\n", rc);
6702
6703         return rc;
6704 }
6705
6706 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
6707 {
6708         int rc;
6709         struct bmic_sense_subsystem_info *sense_info;
6710
6711         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
6712         if (!sense_info)
6713                 return -ENOMEM;
6714
6715         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
6716         if (rc)
6717                 goto out;
6718
6719         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
6720                 sizeof(sense_info->ctrl_serial_number));
6721         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
6722
6723 out:
6724         kfree(sense_info);
6725
6726         return rc;
6727 }
6728
6729 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
6730 {
6731         int rc;
6732         struct bmic_identify_controller *identify;
6733
6734         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
6735         if (!identify)
6736                 return -ENOMEM;
6737
6738         rc = pqi_identify_controller(ctrl_info, identify);
6739         if (rc)
6740                 goto out;
6741
6742         memcpy(ctrl_info->firmware_version, identify->firmware_version,
6743                 sizeof(identify->firmware_version));
6744         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
6745         snprintf(ctrl_info->firmware_version +
6746                 strlen(ctrl_info->firmware_version),
6747                 sizeof(ctrl_info->firmware_version),
6748                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
6749
6750         memcpy(ctrl_info->model, identify->product_id,
6751                 sizeof(identify->product_id));
6752         ctrl_info->model[sizeof(identify->product_id)] = '\0';
6753
6754         memcpy(ctrl_info->vendor, identify->vendor_id,
6755                 sizeof(identify->vendor_id));
6756         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
6757
6758 out:
6759         kfree(identify);
6760
6761         return rc;
6762 }
6763
6764 struct pqi_config_table_section_info {
6765         struct pqi_ctrl_info *ctrl_info;
6766         void            *section;
6767         u32             section_offset;
6768         void __iomem    *section_iomem_addr;
6769 };
6770
6771 static inline bool pqi_is_firmware_feature_supported(
6772         struct pqi_config_table_firmware_features *firmware_features,
6773         unsigned int bit_position)
6774 {
6775         unsigned int byte_index;
6776
6777         byte_index = bit_position / BITS_PER_BYTE;
6778
6779         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
6780                 return false;
6781
6782         return firmware_features->features_supported[byte_index] &
6783                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6784 }
6785
6786 static inline bool pqi_is_firmware_feature_enabled(
6787         struct pqi_config_table_firmware_features *firmware_features,
6788         void __iomem *firmware_features_iomem_addr,
6789         unsigned int bit_position)
6790 {
6791         unsigned int byte_index;
6792         u8 __iomem *features_enabled_iomem_addr;
6793
6794         byte_index = (bit_position / BITS_PER_BYTE) +
6795                 (le16_to_cpu(firmware_features->num_elements) * 2);
6796
6797         features_enabled_iomem_addr = firmware_features_iomem_addr +
6798                 offsetof(struct pqi_config_table_firmware_features,
6799                         features_supported) + byte_index;
6800
6801         return *((__force u8 *)features_enabled_iomem_addr) &
6802                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6803 }
6804
6805 static inline void pqi_request_firmware_feature(
6806         struct pqi_config_table_firmware_features *firmware_features,
6807         unsigned int bit_position)
6808 {
6809         unsigned int byte_index;
6810
6811         byte_index = (bit_position / BITS_PER_BYTE) +
6812                 le16_to_cpu(firmware_features->num_elements);
6813
6814         firmware_features->features_supported[byte_index] |=
6815                 (1 << (bit_position % BITS_PER_BYTE));
6816 }
6817
6818 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
6819         u16 first_section, u16 last_section)
6820 {
6821         struct pqi_vendor_general_request request;
6822
6823         memset(&request, 0, sizeof(request));
6824
6825         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
6826         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
6827                 &request.header.iu_length);
6828         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
6829                 &request.function_code);
6830         put_unaligned_le16(first_section,
6831                 &request.data.config_table_update.first_section);
6832         put_unaligned_le16(last_section,
6833                 &request.data.config_table_update.last_section);
6834
6835         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6836                 0, NULL, NO_TIMEOUT);
6837 }
6838
6839 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
6840         struct pqi_config_table_firmware_features *firmware_features,
6841         void __iomem *firmware_features_iomem_addr)
6842 {
6843         void *features_requested;
6844         void __iomem *features_requested_iomem_addr;
6845
6846         features_requested = firmware_features->features_supported +
6847                 le16_to_cpu(firmware_features->num_elements);
6848
6849         features_requested_iomem_addr = firmware_features_iomem_addr +
6850                 (features_requested - (void *)firmware_features);
6851
6852         memcpy_toio(features_requested_iomem_addr, features_requested,
6853                 le16_to_cpu(firmware_features->num_elements));
6854
6855         return pqi_config_table_update(ctrl_info,
6856                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
6857                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
6858 }
6859
6860 struct pqi_firmware_feature {
6861         char            *feature_name;
6862         unsigned int    feature_bit;
6863         bool            supported;
6864         bool            enabled;
6865         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
6866                 struct pqi_firmware_feature *firmware_feature);
6867 };
6868
6869 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
6870         struct pqi_firmware_feature *firmware_feature)
6871 {
6872         if (!firmware_feature->supported) {
6873                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
6874                         firmware_feature->feature_name);
6875                 return;
6876         }
6877
6878         if (firmware_feature->enabled) {
6879                 dev_info(&ctrl_info->pci_dev->dev,
6880                         "%s enabled\n", firmware_feature->feature_name);
6881                 return;
6882         }
6883
6884         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
6885                 firmware_feature->feature_name);
6886 }
6887
6888 static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
6889         struct pqi_firmware_feature *firmware_feature)
6890 {
6891         switch (firmware_feature->feature_bit) {
6892         case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
6893                 ctrl_info->soft_reset_handshake_supported =
6894                         firmware_feature->enabled;
6895                 break;
6896         case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
6897                 ctrl_info->raid_iu_timeout_supported =
6898                         firmware_feature->enabled;
6899                 break;
6900         case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
6901                 ctrl_info->tmf_iu_timeout_supported =
6902                         firmware_feature->enabled;
6903                 break;
6904         }
6905
6906         pqi_firmware_feature_status(ctrl_info, firmware_feature);
6907 }
6908
6909 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
6910         struct pqi_firmware_feature *firmware_feature)
6911 {
6912         if (firmware_feature->feature_status)
6913                 firmware_feature->feature_status(ctrl_info, firmware_feature);
6914 }
6915
6916 static DEFINE_MUTEX(pqi_firmware_features_mutex);
6917
6918 static struct pqi_firmware_feature pqi_firmware_features[] = {
6919         {
6920                 .feature_name = "Online Firmware Activation",
6921                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
6922                 .feature_status = pqi_firmware_feature_status,
6923         },
6924         {
6925                 .feature_name = "Serial Management Protocol",
6926                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
6927                 .feature_status = pqi_firmware_feature_status,
6928         },
6929         {
6930                 .feature_name = "New Soft Reset Handshake",
6931                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
6932                 .feature_status = pqi_ctrl_update_feature_flags,
6933         },
6934         {
6935                 .feature_name = "RAID IU Timeout",
6936                 .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
6937                 .feature_status = pqi_ctrl_update_feature_flags,
6938         },
6939         {
6940                 .feature_name = "TMF IU Timeout",
6941                 .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
6942                 .feature_status = pqi_ctrl_update_feature_flags,
6943         },
6944 };
6945
6946 static void pqi_process_firmware_features(
6947         struct pqi_config_table_section_info *section_info)
6948 {
6949         int rc;
6950         struct pqi_ctrl_info *ctrl_info;
6951         struct pqi_config_table_firmware_features *firmware_features;
6952         void __iomem *firmware_features_iomem_addr;
6953         unsigned int i;
6954         unsigned int num_features_supported;
6955
6956         ctrl_info = section_info->ctrl_info;
6957         firmware_features = section_info->section;
6958         firmware_features_iomem_addr = section_info->section_iomem_addr;
6959
6960         for (i = 0, num_features_supported = 0;
6961                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
6962                 if (pqi_is_firmware_feature_supported(firmware_features,
6963                         pqi_firmware_features[i].feature_bit)) {
6964                         pqi_firmware_features[i].supported = true;
6965                         num_features_supported++;
6966                 } else {
6967                         pqi_firmware_feature_update(ctrl_info,
6968                                 &pqi_firmware_features[i]);
6969                 }
6970         }
6971
6972         if (num_features_supported == 0)
6973                 return;
6974
6975         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6976                 if (!pqi_firmware_features[i].supported)
6977                         continue;
6978                 pqi_request_firmware_feature(firmware_features,
6979                         pqi_firmware_features[i].feature_bit);
6980         }
6981
6982         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
6983                 firmware_features_iomem_addr);
6984         if (rc) {
6985                 dev_err(&ctrl_info->pci_dev->dev,
6986                         "failed to enable firmware features in PQI configuration table\n");
6987                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6988                         if (!pqi_firmware_features[i].supported)
6989                                 continue;
6990                         pqi_firmware_feature_update(ctrl_info,
6991                                 &pqi_firmware_features[i]);
6992                 }
6993                 return;
6994         }
6995
6996         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6997                 if (!pqi_firmware_features[i].supported)
6998                         continue;
6999                 if (pqi_is_firmware_feature_enabled(firmware_features,
7000                         firmware_features_iomem_addr,
7001                         pqi_firmware_features[i].feature_bit)) {
7002                         pqi_firmware_features[i].enabled = true;
7003                 }
7004                 pqi_firmware_feature_update(ctrl_info,
7005                         &pqi_firmware_features[i]);
7006         }
7007 }
7008
7009 static void pqi_init_firmware_features(void)
7010 {
7011         unsigned int i;
7012
7013         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
7014                 pqi_firmware_features[i].supported = false;
7015                 pqi_firmware_features[i].enabled = false;
7016         }
7017 }
7018
7019 static void pqi_process_firmware_features_section(
7020         struct pqi_config_table_section_info *section_info)
7021 {
7022         mutex_lock(&pqi_firmware_features_mutex);
7023         pqi_init_firmware_features();
7024         pqi_process_firmware_features(section_info);
7025         mutex_unlock(&pqi_firmware_features_mutex);
7026 }
7027
7028 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
7029 {
7030         u32 table_length;
7031         u32 section_offset;
7032         void __iomem *table_iomem_addr;
7033         struct pqi_config_table *config_table;
7034         struct pqi_config_table_section_header *section;
7035         struct pqi_config_table_section_info section_info;
7036
7037         table_length = ctrl_info->config_table_length;
7038         if (table_length == 0)
7039                 return 0;
7040
7041         config_table = kmalloc(table_length, GFP_KERNEL);
7042         if (!config_table) {
7043                 dev_err(&ctrl_info->pci_dev->dev,
7044                         "failed to allocate memory for PQI configuration table\n");
7045                 return -ENOMEM;
7046         }
7047
7048         /*
7049          * Copy the config table contents from I/O memory space into the
7050          * temporary buffer.
7051          */
7052         table_iomem_addr = ctrl_info->iomem_base +
7053                 ctrl_info->config_table_offset;
7054         memcpy_fromio(config_table, table_iomem_addr, table_length);
7055
7056         section_info.ctrl_info = ctrl_info;
7057         section_offset =
7058                 get_unaligned_le32(&config_table->first_section_offset);
7059
7060         while (section_offset) {
7061                 section = (void *)config_table + section_offset;
7062
7063                 section_info.section = section;
7064                 section_info.section_offset = section_offset;
7065                 section_info.section_iomem_addr =
7066                         table_iomem_addr + section_offset;
7067
7068                 switch (get_unaligned_le16(&section->section_id)) {
7069                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
7070                         pqi_process_firmware_features_section(&section_info);
7071                         break;
7072                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
7073                         if (pqi_disable_heartbeat)
7074                                 dev_warn(&ctrl_info->pci_dev->dev,
7075                                 "heartbeat disabled by module parameter\n");
7076                         else
7077                                 ctrl_info->heartbeat_counter =
7078                                         table_iomem_addr +
7079                                         section_offset +
7080                                         offsetof(
7081                                         struct pqi_config_table_heartbeat,
7082                                                 heartbeat_counter);
7083                         break;
7084                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
7085                         ctrl_info->soft_reset_status =
7086                                 table_iomem_addr +
7087                                 section_offset +
7088                                 offsetof(struct pqi_config_table_soft_reset,
7089                                                 soft_reset_status);
7090                         break;
7091                 }
7092
7093                 section_offset =
7094                         get_unaligned_le16(&section->next_section_offset);
7095         }
7096
7097         kfree(config_table);
7098
7099         return 0;
7100 }
7101
7102 /* Switches the controller from PQI mode back into SIS mode. */
7103
7104 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
7105 {
7106         int rc;
7107
7108         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
7109         rc = pqi_reset(ctrl_info);
7110         if (rc)
7111                 return rc;
7112         rc = sis_reenable_sis_mode(ctrl_info);
7113         if (rc) {
7114                 dev_err(&ctrl_info->pci_dev->dev,
7115                         "re-enabling SIS mode failed with error %d\n", rc);
7116                 return rc;
7117         }
7118         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7119
7120         return 0;
7121 }
7122
7123 /*
7124  * If the controller isn't already in SIS mode, this function forces it into
7125  * SIS mode.
7126  */
7127
7128 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
7129 {
7130         if (!sis_is_firmware_running(ctrl_info))
7131                 return -ENXIO;
7132
7133         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
7134                 return 0;
7135
7136         if (sis_is_kernel_up(ctrl_info)) {
7137                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7138                 return 0;
7139         }
7140
7141         return pqi_revert_to_sis_mode(ctrl_info);
7142 }
7143
7144 #define PQI_POST_RESET_DELAY_B4_MSGU_READY      5000
7145
7146 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
7147 {
7148         int rc;
7149
7150         if (reset_devices) {
7151                 sis_soft_reset(ctrl_info);
7152                 msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY);
7153         } else {
7154                 rc = pqi_force_sis_mode(ctrl_info);
7155                 if (rc)
7156                         return rc;
7157         }
7158
7159         /*
7160          * Wait until the controller is ready to start accepting SIS
7161          * commands.
7162          */
7163         rc = sis_wait_for_ctrl_ready(ctrl_info);
7164         if (rc)
7165                 return rc;
7166
7167         /*
7168          * Get the controller properties.  This allows us to determine
7169          * whether or not it supports PQI mode.
7170          */
7171         rc = sis_get_ctrl_properties(ctrl_info);
7172         if (rc) {
7173                 dev_err(&ctrl_info->pci_dev->dev,
7174                         "error obtaining controller properties\n");
7175                 return rc;
7176         }
7177
7178         rc = sis_get_pqi_capabilities(ctrl_info);
7179         if (rc) {
7180                 dev_err(&ctrl_info->pci_dev->dev,
7181                         "error obtaining controller capabilities\n");
7182                 return rc;
7183         }
7184
7185         if (reset_devices) {
7186                 if (ctrl_info->max_outstanding_requests >
7187                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
7188                         ctrl_info->max_outstanding_requests =
7189                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
7190         } else {
7191                 if (ctrl_info->max_outstanding_requests >
7192                         PQI_MAX_OUTSTANDING_REQUESTS)
7193                         ctrl_info->max_outstanding_requests =
7194                                         PQI_MAX_OUTSTANDING_REQUESTS;
7195         }
7196
7197         pqi_calculate_io_resources(ctrl_info);
7198
7199         rc = pqi_alloc_error_buffer(ctrl_info);
7200         if (rc) {
7201                 dev_err(&ctrl_info->pci_dev->dev,
7202                         "failed to allocate PQI error buffer\n");
7203                 return rc;
7204         }
7205
7206         /*
7207          * If the function we are about to call succeeds, the
7208          * controller will transition from legacy SIS mode
7209          * into PQI mode.
7210          */
7211         rc = sis_init_base_struct_addr(ctrl_info);
7212         if (rc) {
7213                 dev_err(&ctrl_info->pci_dev->dev,
7214                         "error initializing PQI mode\n");
7215                 return rc;
7216         }
7217
7218         /* Wait for the controller to complete the SIS -> PQI transition. */
7219         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7220         if (rc) {
7221                 dev_err(&ctrl_info->pci_dev->dev,
7222                         "transition to PQI mode failed\n");
7223                 return rc;
7224         }
7225
7226         /* From here on, we are running in PQI mode. */
7227         ctrl_info->pqi_mode_enabled = true;
7228         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7229
7230         rc = pqi_alloc_admin_queues(ctrl_info);
7231         if (rc) {
7232                 dev_err(&ctrl_info->pci_dev->dev,
7233                         "failed to allocate admin queues\n");
7234                 return rc;
7235         }
7236
7237         rc = pqi_create_admin_queues(ctrl_info);
7238         if (rc) {
7239                 dev_err(&ctrl_info->pci_dev->dev,
7240                         "error creating admin queues\n");
7241                 return rc;
7242         }
7243
7244         rc = pqi_report_device_capability(ctrl_info);
7245         if (rc) {
7246                 dev_err(&ctrl_info->pci_dev->dev,
7247                         "obtaining device capability failed\n");
7248                 return rc;
7249         }
7250
7251         rc = pqi_validate_device_capability(ctrl_info);
7252         if (rc)
7253                 return rc;
7254
7255         pqi_calculate_queue_resources(ctrl_info);
7256
7257         rc = pqi_enable_msix_interrupts(ctrl_info);
7258         if (rc)
7259                 return rc;
7260
7261         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
7262                 ctrl_info->max_msix_vectors =
7263                         ctrl_info->num_msix_vectors_enabled;
7264                 pqi_calculate_queue_resources(ctrl_info);
7265         }
7266
7267         rc = pqi_alloc_io_resources(ctrl_info);
7268         if (rc)
7269                 return rc;
7270
7271         rc = pqi_alloc_operational_queues(ctrl_info);
7272         if (rc) {
7273                 dev_err(&ctrl_info->pci_dev->dev,
7274                         "failed to allocate operational queues\n");
7275                 return rc;
7276         }
7277
7278         pqi_init_operational_queues(ctrl_info);
7279
7280         rc = pqi_request_irqs(ctrl_info);
7281         if (rc)
7282                 return rc;
7283
7284         rc = pqi_create_queues(ctrl_info);
7285         if (rc)
7286                 return rc;
7287
7288         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7289
7290         ctrl_info->controller_online = true;
7291
7292         rc = pqi_process_config_table(ctrl_info);
7293         if (rc)
7294                 return rc;
7295
7296         pqi_start_heartbeat_timer(ctrl_info);
7297
7298         rc = pqi_enable_events(ctrl_info);
7299         if (rc) {
7300                 dev_err(&ctrl_info->pci_dev->dev,
7301                         "error enabling events\n");
7302                 return rc;
7303         }
7304
7305         /* Register with the SCSI subsystem. */
7306         rc = pqi_register_scsi(ctrl_info);
7307         if (rc)
7308                 return rc;
7309
7310         rc = pqi_get_ctrl_product_details(ctrl_info);
7311         if (rc) {
7312                 dev_err(&ctrl_info->pci_dev->dev,
7313                         "error obtaining product details\n");
7314                 return rc;
7315         }
7316
7317         rc = pqi_get_ctrl_serial_number(ctrl_info);
7318         if (rc) {
7319                 dev_err(&ctrl_info->pci_dev->dev,
7320                         "error obtaining ctrl serial number\n");
7321                 return rc;
7322         }
7323
7324         rc = pqi_set_diag_rescan(ctrl_info);
7325         if (rc) {
7326                 dev_err(&ctrl_info->pci_dev->dev,
7327                         "error enabling multi-lun rescan\n");
7328                 return rc;
7329         }
7330
7331         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7332         if (rc) {
7333                 dev_err(&ctrl_info->pci_dev->dev,
7334                         "error updating host wellness\n");
7335                 return rc;
7336         }
7337
7338         pqi_schedule_update_time_worker(ctrl_info);
7339
7340         pqi_scan_scsi_devices(ctrl_info);
7341
7342         return 0;
7343 }
7344
7345 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
7346 {
7347         unsigned int i;
7348         struct pqi_admin_queues *admin_queues;
7349         struct pqi_event_queue *event_queue;
7350
7351         admin_queues = &ctrl_info->admin_queues;
7352         admin_queues->iq_pi_copy = 0;
7353         admin_queues->oq_ci_copy = 0;
7354         writel(0, admin_queues->oq_pi);
7355
7356         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
7357                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
7358                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
7359                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
7360
7361                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
7362                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
7363                 writel(0, ctrl_info->queue_groups[i].oq_pi);
7364         }
7365
7366         event_queue = &ctrl_info->event_queue;
7367         writel(0, event_queue->oq_pi);
7368         event_queue->oq_ci_copy = 0;
7369 }
7370
7371 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
7372 {
7373         int rc;
7374
7375         rc = pqi_force_sis_mode(ctrl_info);
7376         if (rc)
7377                 return rc;
7378
7379         /*
7380          * Wait until the controller is ready to start accepting SIS
7381          * commands.
7382          */
7383         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
7384         if (rc)
7385                 return rc;
7386
7387         /*
7388          * Get the controller properties.  This allows us to determine
7389          * whether or not it supports PQI mode.
7390          */
7391         rc = sis_get_ctrl_properties(ctrl_info);
7392         if (rc) {
7393                 dev_err(&ctrl_info->pci_dev->dev,
7394                         "error obtaining controller properties\n");
7395                 return rc;
7396         }
7397
7398         rc = sis_get_pqi_capabilities(ctrl_info);
7399         if (rc) {
7400                 dev_err(&ctrl_info->pci_dev->dev,
7401                         "error obtaining controller capabilities\n");
7402                 return rc;
7403         }
7404
7405         /*
7406          * If the function we are about to call succeeds, the
7407          * controller will transition from legacy SIS mode
7408          * into PQI mode.
7409          */
7410         rc = sis_init_base_struct_addr(ctrl_info);
7411         if (rc) {
7412                 dev_err(&ctrl_info->pci_dev->dev,
7413                         "error initializing PQI mode\n");
7414                 return rc;
7415         }
7416
7417         /* Wait for the controller to complete the SIS -> PQI transition. */
7418         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7419         if (rc) {
7420                 dev_err(&ctrl_info->pci_dev->dev,
7421                         "transition to PQI mode failed\n");
7422                 return rc;
7423         }
7424
7425         /* From here on, we are running in PQI mode. */
7426         ctrl_info->pqi_mode_enabled = true;
7427         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7428
7429         pqi_reinit_queues(ctrl_info);
7430
7431         rc = pqi_create_admin_queues(ctrl_info);
7432         if (rc) {
7433                 dev_err(&ctrl_info->pci_dev->dev,
7434                         "error creating admin queues\n");
7435                 return rc;
7436         }
7437
7438         rc = pqi_create_queues(ctrl_info);
7439         if (rc)
7440                 return rc;
7441
7442         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7443
7444         ctrl_info->controller_online = true;
7445         pqi_ctrl_unblock_requests(ctrl_info);
7446
7447         rc = pqi_process_config_table(ctrl_info);
7448         if (rc)
7449                 return rc;
7450
7451         pqi_start_heartbeat_timer(ctrl_info);
7452
7453         rc = pqi_enable_events(ctrl_info);
7454         if (rc) {
7455                 dev_err(&ctrl_info->pci_dev->dev,
7456                         "error enabling events\n");
7457                 return rc;
7458         }
7459
7460         rc = pqi_get_ctrl_product_details(ctrl_info);
7461         if (rc) {
7462                 dev_err(&ctrl_info->pci_dev->dev,
7463                         "error obtaining product details\n");
7464                 return rc;
7465         }
7466
7467         rc = pqi_set_diag_rescan(ctrl_info);
7468         if (rc) {
7469                 dev_err(&ctrl_info->pci_dev->dev,
7470                         "error enabling multi-lun rescan\n");
7471                 return rc;
7472         }
7473
7474         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7475         if (rc) {
7476                 dev_err(&ctrl_info->pci_dev->dev,
7477                         "error updating host wellness\n");
7478                 return rc;
7479         }
7480
7481         pqi_schedule_update_time_worker(ctrl_info);
7482
7483         pqi_scan_scsi_devices(ctrl_info);
7484
7485         return 0;
7486 }
7487
7488 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
7489         u16 timeout)
7490 {
7491         int rc;
7492
7493         rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
7494                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
7495
7496         return pcibios_err_to_errno(rc);
7497 }
7498
7499 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
7500 {
7501         int rc;
7502         u64 mask;
7503
7504         rc = pci_enable_device(ctrl_info->pci_dev);
7505         if (rc) {
7506                 dev_err(&ctrl_info->pci_dev->dev,
7507                         "failed to enable PCI device\n");
7508                 return rc;
7509         }
7510
7511         if (sizeof(dma_addr_t) > 4)
7512                 mask = DMA_BIT_MASK(64);
7513         else
7514                 mask = DMA_BIT_MASK(32);
7515
7516         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
7517         if (rc) {
7518                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
7519                 goto disable_device;
7520         }
7521
7522         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
7523         if (rc) {
7524                 dev_err(&ctrl_info->pci_dev->dev,
7525                         "failed to obtain PCI resources\n");
7526                 goto disable_device;
7527         }
7528
7529         ctrl_info->iomem_base = ioremap(pci_resource_start(
7530                 ctrl_info->pci_dev, 0),
7531                 sizeof(struct pqi_ctrl_registers));
7532         if (!ctrl_info->iomem_base) {
7533                 dev_err(&ctrl_info->pci_dev->dev,
7534                         "failed to map memory for controller registers\n");
7535                 rc = -ENOMEM;
7536                 goto release_regions;
7537         }
7538
7539 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
7540
7541         /* Increase the PCIe completion timeout. */
7542         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
7543                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
7544         if (rc) {
7545                 dev_err(&ctrl_info->pci_dev->dev,
7546                         "failed to set PCIe completion timeout\n");
7547                 goto release_regions;
7548         }
7549
7550         /* Enable bus mastering. */
7551         pci_set_master(ctrl_info->pci_dev);
7552
7553         ctrl_info->registers = ctrl_info->iomem_base;
7554         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
7555
7556         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
7557
7558         return 0;
7559
7560 release_regions:
7561         pci_release_regions(ctrl_info->pci_dev);
7562 disable_device:
7563         pci_disable_device(ctrl_info->pci_dev);
7564
7565         return rc;
7566 }
7567
7568 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
7569 {
7570         iounmap(ctrl_info->iomem_base);
7571         pci_release_regions(ctrl_info->pci_dev);
7572         if (pci_is_enabled(ctrl_info->pci_dev))
7573                 pci_disable_device(ctrl_info->pci_dev);
7574         pci_set_drvdata(ctrl_info->pci_dev, NULL);
7575 }
7576
7577 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
7578 {
7579         struct pqi_ctrl_info *ctrl_info;
7580
7581         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
7582                         GFP_KERNEL, numa_node);
7583         if (!ctrl_info)
7584                 return NULL;
7585
7586         mutex_init(&ctrl_info->scan_mutex);
7587         mutex_init(&ctrl_info->lun_reset_mutex);
7588         mutex_init(&ctrl_info->ofa_mutex);
7589
7590         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
7591         spin_lock_init(&ctrl_info->scsi_device_list_lock);
7592
7593         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
7594         atomic_set(&ctrl_info->num_interrupts, 0);
7595         atomic_set(&ctrl_info->sync_cmds_outstanding, 0);
7596
7597         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
7598         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
7599
7600         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
7601         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
7602
7603         sema_init(&ctrl_info->sync_request_sem,
7604                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
7605         init_waitqueue_head(&ctrl_info->block_requests_wait);
7606
7607         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
7608         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
7609         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
7610                 pqi_raid_bypass_retry_worker);
7611
7612         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
7613         ctrl_info->irq_mode = IRQ_MODE_NONE;
7614         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
7615
7616         return ctrl_info;
7617 }
7618
7619 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
7620 {
7621         kfree(ctrl_info);
7622 }
7623
7624 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
7625 {
7626         pqi_free_irqs(ctrl_info);
7627         pqi_disable_msix_interrupts(ctrl_info);
7628 }
7629
7630 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
7631 {
7632         pqi_stop_heartbeat_timer(ctrl_info);
7633         pqi_free_interrupts(ctrl_info);
7634         if (ctrl_info->queue_memory_base)
7635                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7636                         ctrl_info->queue_memory_length,
7637                         ctrl_info->queue_memory_base,
7638                         ctrl_info->queue_memory_base_dma_handle);
7639         if (ctrl_info->admin_queue_memory_base)
7640                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7641                         ctrl_info->admin_queue_memory_length,
7642                         ctrl_info->admin_queue_memory_base,
7643                         ctrl_info->admin_queue_memory_base_dma_handle);
7644         pqi_free_all_io_requests(ctrl_info);
7645         if (ctrl_info->error_buffer)
7646                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7647                         ctrl_info->error_buffer_length,
7648                         ctrl_info->error_buffer,
7649                         ctrl_info->error_buffer_dma_handle);
7650         if (ctrl_info->iomem_base)
7651                 pqi_cleanup_pci_init(ctrl_info);
7652         pqi_free_ctrl_info(ctrl_info);
7653 }
7654
7655 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
7656 {
7657         pqi_cancel_rescan_worker(ctrl_info);
7658         pqi_cancel_update_time_worker(ctrl_info);
7659         pqi_unregister_scsi(ctrl_info);
7660         if (ctrl_info->pqi_mode_enabled)
7661                 pqi_revert_to_sis_mode(ctrl_info);
7662         pqi_free_ctrl_resources(ctrl_info);
7663 }
7664
7665 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
7666 {
7667         pqi_cancel_update_time_worker(ctrl_info);
7668         pqi_cancel_rescan_worker(ctrl_info);
7669         pqi_wait_until_lun_reset_finished(ctrl_info);
7670         pqi_wait_until_scan_finished(ctrl_info);
7671         pqi_ctrl_ofa_start(ctrl_info);
7672         pqi_ctrl_block_requests(ctrl_info);
7673         pqi_ctrl_wait_until_quiesced(ctrl_info);
7674         pqi_ctrl_wait_for_pending_io(ctrl_info, PQI_PENDING_IO_TIMEOUT_SECS);
7675         pqi_fail_io_queued_for_all_devices(ctrl_info);
7676         pqi_wait_until_inbound_queues_empty(ctrl_info);
7677         pqi_stop_heartbeat_timer(ctrl_info);
7678         ctrl_info->pqi_mode_enabled = false;
7679         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7680 }
7681
7682 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
7683 {
7684         pqi_ofa_free_host_buffer(ctrl_info);
7685         ctrl_info->pqi_mode_enabled = true;
7686         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7687         ctrl_info->controller_online = true;
7688         pqi_ctrl_unblock_requests(ctrl_info);
7689         pqi_start_heartbeat_timer(ctrl_info);
7690         pqi_schedule_update_time_worker(ctrl_info);
7691         pqi_clear_soft_reset_status(ctrl_info,
7692                 PQI_SOFT_RESET_ABORT);
7693         pqi_scan_scsi_devices(ctrl_info);
7694 }
7695
7696 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info,
7697         u32 total_size, u32 chunk_size)
7698 {
7699         u32 sg_count;
7700         u32 size;
7701         int i;
7702         struct pqi_sg_descriptor *mem_descriptor = NULL;
7703         struct device *dev;
7704         struct pqi_ofa_memory *ofap;
7705
7706         dev = &ctrl_info->pci_dev->dev;
7707
7708         sg_count = (total_size + chunk_size - 1);
7709         sg_count /= chunk_size;
7710
7711         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7712
7713         if (sg_count*chunk_size < total_size)
7714                 goto out;
7715
7716         ctrl_info->pqi_ofa_chunk_virt_addr =
7717                                 kcalloc(sg_count, sizeof(void *), GFP_KERNEL);
7718         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
7719                 goto out;
7720
7721         for (size = 0, i = 0; size < total_size; size += chunk_size, i++) {
7722                 dma_addr_t dma_handle;
7723
7724                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
7725                         dma_alloc_coherent(dev, chunk_size, &dma_handle,
7726                                            GFP_KERNEL);
7727
7728                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
7729                         break;
7730
7731                 mem_descriptor = &ofap->sg_descriptor[i];
7732                 put_unaligned_le64 ((u64) dma_handle, &mem_descriptor->address);
7733                 put_unaligned_le32 (chunk_size, &mem_descriptor->length);
7734         }
7735
7736         if (!size || size < total_size)
7737                 goto out_free_chunks;
7738
7739         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
7740         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
7741         put_unaligned_le32(size, &ofap->bytes_allocated);
7742
7743         return 0;
7744
7745 out_free_chunks:
7746         while (--i >= 0) {
7747                 mem_descriptor = &ofap->sg_descriptor[i];
7748                 dma_free_coherent(dev, chunk_size,
7749                                 ctrl_info->pqi_ofa_chunk_virt_addr[i],
7750                                 get_unaligned_le64(&mem_descriptor->address));
7751         }
7752         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7753
7754 out:
7755         put_unaligned_le32 (0, &ofap->bytes_allocated);
7756         return -ENOMEM;
7757 }
7758
7759 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
7760 {
7761         u32 total_size;
7762         u32 min_chunk_size;
7763         u32 chunk_sz;
7764
7765         total_size = le32_to_cpu(
7766                         ctrl_info->pqi_ofa_mem_virt_addr->bytes_allocated);
7767         min_chunk_size = total_size / PQI_OFA_MAX_SG_DESCRIPTORS;
7768
7769         for (chunk_sz = total_size; chunk_sz >= min_chunk_size; chunk_sz /= 2)
7770                 if (!pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_sz))
7771                         return 0;
7772
7773         return -ENOMEM;
7774 }
7775
7776 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
7777         u32 bytes_requested)
7778 {
7779         struct pqi_ofa_memory *pqi_ofa_memory;
7780         struct device *dev;
7781
7782         dev = &ctrl_info->pci_dev->dev;
7783         pqi_ofa_memory = dma_alloc_coherent(dev,
7784                                             PQI_OFA_MEMORY_DESCRIPTOR_LENGTH,
7785                                             &ctrl_info->pqi_ofa_mem_dma_handle,
7786                                             GFP_KERNEL);
7787
7788         if (!pqi_ofa_memory)
7789                 return;
7790
7791         put_unaligned_le16(PQI_OFA_VERSION, &pqi_ofa_memory->version);
7792         memcpy(&pqi_ofa_memory->signature, PQI_OFA_SIGNATURE,
7793                                         sizeof(pqi_ofa_memory->signature));
7794         pqi_ofa_memory->bytes_allocated = cpu_to_le32(bytes_requested);
7795
7796         ctrl_info->pqi_ofa_mem_virt_addr = pqi_ofa_memory;
7797
7798         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
7799                 dev_err(dev, "Failed to allocate host buffer of size = %u",
7800                         bytes_requested);
7801         }
7802
7803         return;
7804 }
7805
7806 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
7807 {
7808         int i;
7809         struct pqi_sg_descriptor *mem_descriptor;
7810         struct pqi_ofa_memory *ofap;
7811
7812         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7813
7814         if (!ofap)
7815                 return;
7816
7817         if (!ofap->bytes_allocated)
7818                 goto out;
7819
7820         mem_descriptor = ofap->sg_descriptor;
7821
7822         for (i = 0; i < get_unaligned_le16(&ofap->num_memory_descriptors);
7823                 i++) {
7824                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7825                         get_unaligned_le32(&mem_descriptor[i].length),
7826                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
7827                         get_unaligned_le64(&mem_descriptor[i].address));
7828         }
7829         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7830
7831 out:
7832         dma_free_coherent(&ctrl_info->pci_dev->dev,
7833                         PQI_OFA_MEMORY_DESCRIPTOR_LENGTH, ofap,
7834                         ctrl_info->pqi_ofa_mem_dma_handle);
7835         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
7836 }
7837
7838 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
7839 {
7840         struct pqi_vendor_general_request request;
7841         size_t size;
7842         struct pqi_ofa_memory *ofap;
7843
7844         memset(&request, 0, sizeof(request));
7845
7846         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7847
7848         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7849         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7850                 &request.header.iu_length);
7851         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
7852                 &request.function_code);
7853
7854         if (ofap) {
7855                 size = offsetof(struct pqi_ofa_memory, sg_descriptor) +
7856                         get_unaligned_le16(&ofap->num_memory_descriptors) *
7857                         sizeof(struct pqi_sg_descriptor);
7858
7859                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
7860                         &request.data.ofa_memory_allocation.buffer_address);
7861                 put_unaligned_le32(size,
7862                         &request.data.ofa_memory_allocation.buffer_length);
7863
7864         }
7865
7866         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
7867                 0, NULL, NO_TIMEOUT);
7868 }
7869
7870 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info)
7871 {
7872         msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY);
7873         return pqi_ctrl_init_resume(ctrl_info);
7874 }
7875
7876 static void pqi_perform_lockup_action(void)
7877 {
7878         switch (pqi_lockup_action) {
7879         case PANIC:
7880                 panic("FATAL: Smart Family Controller lockup detected");
7881                 break;
7882         case REBOOT:
7883                 emergency_restart();
7884                 break;
7885         case NONE:
7886         default:
7887                 break;
7888         }
7889 }
7890
7891 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
7892         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
7893         .status = SAM_STAT_CHECK_CONDITION,
7894 };
7895
7896 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
7897 {
7898         unsigned int i;
7899         struct pqi_io_request *io_request;
7900         struct scsi_cmnd *scmd;
7901
7902         for (i = 0; i < ctrl_info->max_io_slots; i++) {
7903                 io_request = &ctrl_info->io_request_pool[i];
7904                 if (atomic_read(&io_request->refcount) == 0)
7905                         continue;
7906
7907                 scmd = io_request->scmd;
7908                 if (scmd) {
7909                         set_host_byte(scmd, DID_NO_CONNECT);
7910                 } else {
7911                         io_request->status = -ENXIO;
7912                         io_request->error_info =
7913                                 &pqi_ctrl_offline_raid_error_info;
7914                 }
7915
7916                 io_request->io_complete_callback(io_request,
7917                         io_request->context);
7918         }
7919 }
7920
7921 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
7922 {
7923         pqi_perform_lockup_action();
7924         pqi_stop_heartbeat_timer(ctrl_info);
7925         pqi_free_interrupts(ctrl_info);
7926         pqi_cancel_rescan_worker(ctrl_info);
7927         pqi_cancel_update_time_worker(ctrl_info);
7928         pqi_ctrl_wait_until_quiesced(ctrl_info);
7929         pqi_fail_all_outstanding_requests(ctrl_info);
7930         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
7931         pqi_ctrl_unblock_requests(ctrl_info);
7932 }
7933
7934 static void pqi_ctrl_offline_worker(struct work_struct *work)
7935 {
7936         struct pqi_ctrl_info *ctrl_info;
7937
7938         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
7939         pqi_take_ctrl_offline_deferred(ctrl_info);
7940 }
7941
7942 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
7943 {
7944         if (!ctrl_info->controller_online)
7945                 return;
7946
7947         ctrl_info->controller_online = false;
7948         ctrl_info->pqi_mode_enabled = false;
7949         pqi_ctrl_block_requests(ctrl_info);
7950         if (!pqi_disable_ctrl_shutdown)
7951                 sis_shutdown_ctrl(ctrl_info);
7952         pci_disable_device(ctrl_info->pci_dev);
7953         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
7954         schedule_work(&ctrl_info->ctrl_offline_work);
7955 }
7956
7957 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
7958         const struct pci_device_id *id)
7959 {
7960         char *ctrl_description;
7961
7962         if (id->driver_data)
7963                 ctrl_description = (char *)id->driver_data;
7964         else
7965                 ctrl_description = "Microsemi Smart Family Controller";
7966
7967         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
7968 }
7969
7970 static int pqi_pci_probe(struct pci_dev *pci_dev,
7971         const struct pci_device_id *id)
7972 {
7973         int rc;
7974         int node, cp_node;
7975         struct pqi_ctrl_info *ctrl_info;
7976
7977         pqi_print_ctrl_info(pci_dev, id);
7978
7979         if (pqi_disable_device_id_wildcards &&
7980                 id->subvendor == PCI_ANY_ID &&
7981                 id->subdevice == PCI_ANY_ID) {
7982                 dev_warn(&pci_dev->dev,
7983                         "controller not probed because device ID wildcards are disabled\n");
7984                 return -ENODEV;
7985         }
7986
7987         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
7988                 dev_warn(&pci_dev->dev,
7989                         "controller device ID matched using wildcards\n");
7990
7991         node = dev_to_node(&pci_dev->dev);
7992         if (node == NUMA_NO_NODE) {
7993                 cp_node = cpu_to_node(0);
7994                 if (cp_node == NUMA_NO_NODE)
7995                         cp_node = 0;
7996                 set_dev_node(&pci_dev->dev, cp_node);
7997         }
7998
7999         ctrl_info = pqi_alloc_ctrl_info(node);
8000         if (!ctrl_info) {
8001                 dev_err(&pci_dev->dev,
8002                         "failed to allocate controller info block\n");
8003                 return -ENOMEM;
8004         }
8005
8006         ctrl_info->pci_dev = pci_dev;
8007
8008         rc = pqi_pci_init(ctrl_info);
8009         if (rc)
8010                 goto error;
8011
8012         rc = pqi_ctrl_init(ctrl_info);
8013         if (rc)
8014                 goto error;
8015
8016         return 0;
8017
8018 error:
8019         pqi_remove_ctrl(ctrl_info);
8020
8021         return rc;
8022 }
8023
8024 static void pqi_pci_remove(struct pci_dev *pci_dev)
8025 {
8026         struct pqi_ctrl_info *ctrl_info;
8027
8028         ctrl_info = pci_get_drvdata(pci_dev);
8029         if (!ctrl_info)
8030                 return;
8031
8032         pqi_remove_ctrl(ctrl_info);
8033 }
8034
8035 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
8036 {
8037         unsigned int i;
8038         struct pqi_io_request *io_request;
8039         struct scsi_cmnd *scmd;
8040
8041         for (i = 0; i < ctrl_info->max_io_slots; i++) {
8042                 io_request = &ctrl_info->io_request_pool[i];
8043                 if (atomic_read(&io_request->refcount) == 0)
8044                         continue;
8045                 scmd = io_request->scmd;
8046                 WARN_ON(scmd != NULL); /* IO command from SML */
8047                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
8048         }
8049 }
8050
8051 static void pqi_shutdown(struct pci_dev *pci_dev)
8052 {
8053         int rc;
8054         struct pqi_ctrl_info *ctrl_info;
8055
8056         ctrl_info = pci_get_drvdata(pci_dev);
8057         if (!ctrl_info) {
8058                 dev_err(&pci_dev->dev,
8059                         "cache could not be flushed\n");
8060                 return;
8061         }
8062
8063         pqi_disable_events(ctrl_info);
8064         pqi_wait_until_ofa_finished(ctrl_info);
8065         pqi_cancel_update_time_worker(ctrl_info);
8066         pqi_cancel_rescan_worker(ctrl_info);
8067         pqi_cancel_event_worker(ctrl_info);
8068
8069         pqi_ctrl_shutdown_start(ctrl_info);
8070         pqi_ctrl_wait_until_quiesced(ctrl_info);
8071
8072         rc = pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
8073         if (rc) {
8074                 dev_err(&pci_dev->dev,
8075                         "wait for pending I/O failed\n");
8076                 return;
8077         }
8078
8079         pqi_ctrl_block_device_reset(ctrl_info);
8080         pqi_wait_until_lun_reset_finished(ctrl_info);
8081
8082         /*
8083          * Write all data in the controller's battery-backed cache to
8084          * storage.
8085          */
8086         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
8087         if (rc)
8088                 dev_err(&pci_dev->dev,
8089                         "unable to flush controller cache\n");
8090
8091         pqi_ctrl_block_requests(ctrl_info);
8092
8093         rc = pqi_ctrl_wait_for_pending_sync_cmds(ctrl_info);
8094         if (rc) {
8095                 dev_err(&pci_dev->dev,
8096                         "wait for pending sync cmds failed\n");
8097                 return;
8098         }
8099
8100         pqi_crash_if_pending_command(ctrl_info);
8101         pqi_reset(ctrl_info);
8102 }
8103
8104 static void pqi_process_lockup_action_param(void)
8105 {
8106         unsigned int i;
8107
8108         if (!pqi_lockup_action_param)
8109                 return;
8110
8111         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
8112                 if (strcmp(pqi_lockup_action_param,
8113                         pqi_lockup_actions[i].name) == 0) {
8114                         pqi_lockup_action = pqi_lockup_actions[i].action;
8115                         return;
8116                 }
8117         }
8118
8119         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
8120                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
8121 }
8122
8123 static void pqi_process_module_params(void)
8124 {
8125         pqi_process_lockup_action_param();
8126 }
8127
8128 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
8129 {
8130         struct pqi_ctrl_info *ctrl_info;
8131
8132         ctrl_info = pci_get_drvdata(pci_dev);
8133
8134         pqi_disable_events(ctrl_info);
8135         pqi_cancel_update_time_worker(ctrl_info);
8136         pqi_cancel_rescan_worker(ctrl_info);
8137         pqi_wait_until_scan_finished(ctrl_info);
8138         pqi_wait_until_lun_reset_finished(ctrl_info);
8139         pqi_wait_until_ofa_finished(ctrl_info);
8140         pqi_flush_cache(ctrl_info, SUSPEND);
8141         pqi_ctrl_block_requests(ctrl_info);
8142         pqi_ctrl_wait_until_quiesced(ctrl_info);
8143         pqi_wait_until_inbound_queues_empty(ctrl_info);
8144         pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
8145         pqi_stop_heartbeat_timer(ctrl_info);
8146
8147         if (state.event == PM_EVENT_FREEZE)
8148                 return 0;
8149
8150         pci_save_state(pci_dev);
8151         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
8152
8153         ctrl_info->controller_online = false;
8154         ctrl_info->pqi_mode_enabled = false;
8155
8156         return 0;
8157 }
8158
8159 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
8160 {
8161         int rc;
8162         struct pqi_ctrl_info *ctrl_info;
8163
8164         ctrl_info = pci_get_drvdata(pci_dev);
8165
8166         if (pci_dev->current_state != PCI_D0) {
8167                 ctrl_info->max_hw_queue_index = 0;
8168                 pqi_free_interrupts(ctrl_info);
8169                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
8170                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
8171                         IRQF_SHARED, DRIVER_NAME_SHORT,
8172                         &ctrl_info->queue_groups[0]);
8173                 if (rc) {
8174                         dev_err(&ctrl_info->pci_dev->dev,
8175                                 "irq %u init failed with error %d\n",
8176                                 pci_dev->irq, rc);
8177                         return rc;
8178                 }
8179                 pqi_start_heartbeat_timer(ctrl_info);
8180                 pqi_ctrl_unblock_requests(ctrl_info);
8181                 return 0;
8182         }
8183
8184         pci_set_power_state(pci_dev, PCI_D0);
8185         pci_restore_state(pci_dev);
8186
8187         return pqi_ctrl_init_resume(ctrl_info);
8188 }
8189
8190 /* Define the PCI IDs for the controllers that we support. */
8191 static const struct pci_device_id pqi_pci_id_table[] = {
8192         {
8193                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8194                                0x105b, 0x1211)
8195         },
8196         {
8197                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8198                                0x105b, 0x1321)
8199         },
8200         {
8201                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8202                                0x152d, 0x8a22)
8203         },
8204         {
8205                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8206                                0x152d, 0x8a23)
8207         },
8208         {
8209                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8210                                0x152d, 0x8a24)
8211         },
8212         {
8213                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8214                                0x152d, 0x8a36)
8215         },
8216         {
8217                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8218                                0x152d, 0x8a37)
8219         },
8220         {
8221                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8222                                0x193d, 0x1104)
8223         },
8224         {
8225                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8226                                0x193d, 0x1105)
8227         },
8228         {
8229                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8230                                0x193d, 0x1106)
8231         },
8232         {
8233                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8234                                0x193d, 0x1107)
8235         },
8236         {
8237                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8238                                0x193d, 0x8460)
8239         },
8240         {
8241                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8242                                0x193d, 0x8461)
8243         },
8244         {
8245                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8246                                0x193d, 0xc460)
8247         },
8248         {
8249                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8250                                0x193d, 0xc461)
8251         },
8252         {
8253                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8254                                0x193d, 0xf460)
8255         },
8256         {
8257                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8258                                0x193d, 0xf461)
8259         },
8260         {
8261                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8262                                0x1bd4, 0x0045)
8263         },
8264         {
8265                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8266                                0x1bd4, 0x0046)
8267         },
8268         {
8269                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8270                                0x1bd4, 0x0047)
8271         },
8272         {
8273                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8274                                0x1bd4, 0x0048)
8275         },
8276         {
8277                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8278                                0x1bd4, 0x004a)
8279         },
8280         {
8281                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8282                                0x1bd4, 0x004b)
8283         },
8284         {
8285                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8286                                0x1bd4, 0x004c)
8287         },
8288         {
8289                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8290                                0x1bd4, 0x004f)
8291         },
8292         {
8293                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8294                                0x19e5, 0xd227)
8295         },
8296         {
8297                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8298                                0x19e5, 0xd228)
8299         },
8300         {
8301                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8302                                0x19e5, 0xd229)
8303         },
8304         {
8305                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8306                                0x19e5, 0xd22a)
8307         },
8308         {
8309                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8310                                0x19e5, 0xd22b)
8311         },
8312         {
8313                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8314                                0x19e5, 0xd22c)
8315         },
8316         {
8317                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8318                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
8319         },
8320         {
8321                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8322                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
8323         },
8324         {
8325                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8326                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
8327         },
8328         {
8329                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8330                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
8331         },
8332         {
8333                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8334                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
8335         },
8336         {
8337                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8338                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
8339         },
8340         {
8341                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8342                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
8343         },
8344         {
8345                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8346                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
8347         },
8348         {
8349                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8350                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
8351         },
8352         {
8353                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8354                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
8355         },
8356         {
8357                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8358                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
8359         },
8360         {
8361                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8362                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
8363         },
8364         {
8365                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8366                                PCI_VENDOR_ID_ADAPTEC2, 0x080a)
8367         },
8368         {
8369                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8370                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
8371         },
8372         {
8373                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8374                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
8375         },
8376         {
8377                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8378                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
8379         },
8380         {
8381                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8382                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
8383         },
8384         {
8385                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8386                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
8387         },
8388         {
8389                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8390                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
8391         },
8392         {
8393                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8394                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
8395         },
8396         {
8397                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8398                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
8399         },
8400         {
8401                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8402                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
8403         },
8404         {
8405                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8406                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
8407         },
8408         {
8409                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8410                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
8411         },
8412         {
8413                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8414                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
8415         },
8416         {
8417                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8418                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
8419         },
8420         {
8421                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8422                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
8423         },
8424         {
8425                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8426                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
8427         },
8428         {
8429                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8430                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
8431         },
8432         {
8433                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8434                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
8435         },
8436         {
8437                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8438                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
8439         },
8440         {
8441                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8442                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
8443         },
8444         {
8445                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8446                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
8447         },
8448         {
8449                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8450                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
8451         },
8452         {
8453                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8454                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
8455         },
8456         {
8457                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8458                                PCI_VENDOR_ID_DELL, 0x1fe0)
8459         },
8460         {
8461                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8462                                PCI_VENDOR_ID_HP, 0x0600)
8463         },
8464         {
8465                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8466                                PCI_VENDOR_ID_HP, 0x0601)
8467         },
8468         {
8469                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8470                                PCI_VENDOR_ID_HP, 0x0602)
8471         },
8472         {
8473                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8474                                PCI_VENDOR_ID_HP, 0x0603)
8475         },
8476         {
8477                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8478                                PCI_VENDOR_ID_HP, 0x0609)
8479         },
8480         {
8481                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8482                                PCI_VENDOR_ID_HP, 0x0650)
8483         },
8484         {
8485                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8486                                PCI_VENDOR_ID_HP, 0x0651)
8487         },
8488         {
8489                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8490                                PCI_VENDOR_ID_HP, 0x0652)
8491         },
8492         {
8493                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8494                                PCI_VENDOR_ID_HP, 0x0653)
8495         },
8496         {
8497                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8498                                PCI_VENDOR_ID_HP, 0x0654)
8499         },
8500         {
8501                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8502                                PCI_VENDOR_ID_HP, 0x0655)
8503         },
8504         {
8505                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8506                                PCI_VENDOR_ID_HP, 0x0700)
8507         },
8508         {
8509                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8510                                PCI_VENDOR_ID_HP, 0x0701)
8511         },
8512         {
8513                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8514                                PCI_VENDOR_ID_HP, 0x1001)
8515         },
8516         {
8517                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8518                                PCI_VENDOR_ID_HP, 0x1100)
8519         },
8520         {
8521                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8522                                PCI_VENDOR_ID_HP, 0x1101)
8523         },
8524         {
8525                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8526                                0x1d8d, 0x0800)
8527         },
8528         {
8529                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8530                                0x1d8d, 0x0908)
8531         },
8532         {
8533                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8534                                0x1d8d, 0x0806)
8535         },
8536         {
8537                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8538                                0x1d8d, 0x0916)
8539         },
8540         {
8541                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8542                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
8543         },
8544         {
8545                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8546                                PCI_ANY_ID, PCI_ANY_ID)
8547         },
8548         { 0 }
8549 };
8550
8551 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
8552
8553 static struct pci_driver pqi_pci_driver = {
8554         .name = DRIVER_NAME_SHORT,
8555         .id_table = pqi_pci_id_table,
8556         .probe = pqi_pci_probe,
8557         .remove = pqi_pci_remove,
8558         .shutdown = pqi_shutdown,
8559 #if defined(CONFIG_PM)
8560         .suspend = pqi_suspend,
8561         .resume = pqi_resume,
8562 #endif
8563 };
8564
8565 static int __init pqi_init(void)
8566 {
8567         int rc;
8568
8569         pr_info(DRIVER_NAME "\n");
8570
8571         pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
8572         if (!pqi_sas_transport_template)
8573                 return -ENODEV;
8574
8575         pqi_process_module_params();
8576
8577         rc = pci_register_driver(&pqi_pci_driver);
8578         if (rc)
8579                 sas_release_transport(pqi_sas_transport_template);
8580
8581         return rc;
8582 }
8583
8584 static void __exit pqi_cleanup(void)
8585 {
8586         pci_unregister_driver(&pqi_pci_driver);
8587         sas_release_transport(pqi_sas_transport_template);
8588 }
8589
8590 module_init(pqi_init);
8591 module_exit(pqi_cleanup);
8592
8593 static void __attribute__((unused)) verify_structures(void)
8594 {
8595         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8596                 sis_host_to_ctrl_doorbell) != 0x20);
8597         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8598                 sis_interrupt_mask) != 0x34);
8599         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8600                 sis_ctrl_to_host_doorbell) != 0x9c);
8601         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8602                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
8603         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8604                 sis_driver_scratch) != 0xb0);
8605         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8606                 sis_firmware_status) != 0xbc);
8607         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8608                 sis_mailbox) != 0x1000);
8609         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8610                 pqi_registers) != 0x4000);
8611
8612         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8613                 iu_type) != 0x0);
8614         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8615                 iu_length) != 0x2);
8616         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8617                 response_queue_id) != 0x4);
8618         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8619                 work_area) != 0x6);
8620         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
8621
8622         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8623                 status) != 0x0);
8624         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8625                 service_response) != 0x1);
8626         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8627                 data_present) != 0x2);
8628         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8629                 reserved) != 0x3);
8630         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8631                 residual_count) != 0x4);
8632         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8633                 data_length) != 0x8);
8634         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8635                 reserved1) != 0xa);
8636         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8637                 data) != 0xc);
8638         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
8639
8640         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8641                 data_in_result) != 0x0);
8642         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8643                 data_out_result) != 0x1);
8644         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8645                 reserved) != 0x2);
8646         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8647                 status) != 0x5);
8648         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8649                 status_qualifier) != 0x6);
8650         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8651                 sense_data_length) != 0x8);
8652         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8653                 response_data_length) != 0xa);
8654         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8655                 data_in_transferred) != 0xc);
8656         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8657                 data_out_transferred) != 0x10);
8658         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8659                 data) != 0x14);
8660         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
8661
8662         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8663                 signature) != 0x0);
8664         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8665                 function_and_status_code) != 0x8);
8666         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8667                 max_admin_iq_elements) != 0x10);
8668         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8669                 max_admin_oq_elements) != 0x11);
8670         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8671                 admin_iq_element_length) != 0x12);
8672         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8673                 admin_oq_element_length) != 0x13);
8674         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8675                 max_reset_timeout) != 0x14);
8676         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8677                 legacy_intx_status) != 0x18);
8678         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8679                 legacy_intx_mask_set) != 0x1c);
8680         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8681                 legacy_intx_mask_clear) != 0x20);
8682         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8683                 device_status) != 0x40);
8684         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8685                 admin_iq_pi_offset) != 0x48);
8686         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8687                 admin_oq_ci_offset) != 0x50);
8688         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8689                 admin_iq_element_array_addr) != 0x58);
8690         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8691                 admin_oq_element_array_addr) != 0x60);
8692         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8693                 admin_iq_ci_addr) != 0x68);
8694         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8695                 admin_oq_pi_addr) != 0x70);
8696         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8697                 admin_iq_num_elements) != 0x78);
8698         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8699                 admin_oq_num_elements) != 0x79);
8700         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8701                 admin_queue_int_msg_num) != 0x7a);
8702         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8703                 device_error) != 0x80);
8704         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8705                 error_details) != 0x88);
8706         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8707                 device_reset) != 0x90);
8708         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8709                 power_action) != 0x94);
8710         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
8711
8712         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8713                 header.iu_type) != 0);
8714         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8715                 header.iu_length) != 2);
8716         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8717                 header.work_area) != 6);
8718         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8719                 request_id) != 8);
8720         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8721                 function_code) != 10);
8722         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8723                 data.report_device_capability.buffer_length) != 44);
8724         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8725                 data.report_device_capability.sg_descriptor) != 48);
8726         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8727                 data.create_operational_iq.queue_id) != 12);
8728         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8729                 data.create_operational_iq.element_array_addr) != 16);
8730         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8731                 data.create_operational_iq.ci_addr) != 24);
8732         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8733                 data.create_operational_iq.num_elements) != 32);
8734         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8735                 data.create_operational_iq.element_length) != 34);
8736         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8737                 data.create_operational_iq.queue_protocol) != 36);
8738         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8739                 data.create_operational_oq.queue_id) != 12);
8740         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8741                 data.create_operational_oq.element_array_addr) != 16);
8742         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8743                 data.create_operational_oq.pi_addr) != 24);
8744         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8745                 data.create_operational_oq.num_elements) != 32);
8746         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8747                 data.create_operational_oq.element_length) != 34);
8748         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8749                 data.create_operational_oq.queue_protocol) != 36);
8750         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8751                 data.create_operational_oq.int_msg_num) != 40);
8752         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8753                 data.create_operational_oq.coalescing_count) != 42);
8754         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8755                 data.create_operational_oq.min_coalescing_time) != 44);
8756         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8757                 data.create_operational_oq.max_coalescing_time) != 48);
8758         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8759                 data.delete_operational_queue.queue_id) != 12);
8760         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
8761         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
8762                 data.create_operational_iq) != 64 - 11);
8763         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
8764                 data.create_operational_oq) != 64 - 11);
8765         BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
8766                 data.delete_operational_queue) != 64 - 11);
8767
8768         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8769                 header.iu_type) != 0);
8770         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8771                 header.iu_length) != 2);
8772         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8773                 header.work_area) != 6);
8774         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8775                 request_id) != 8);
8776         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8777                 function_code) != 10);
8778         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8779                 status) != 11);
8780         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8781                 data.create_operational_iq.status_descriptor) != 12);
8782         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8783                 data.create_operational_iq.iq_pi_offset) != 16);
8784         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8785                 data.create_operational_oq.status_descriptor) != 12);
8786         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8787                 data.create_operational_oq.oq_ci_offset) != 16);
8788         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
8789
8790         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8791                 header.iu_type) != 0);
8792         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8793                 header.iu_length) != 2);
8794         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8795                 header.response_queue_id) != 4);
8796         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8797                 header.work_area) != 6);
8798         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8799                 request_id) != 8);
8800         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8801                 nexus_id) != 10);
8802         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8803                 buffer_length) != 12);
8804         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8805                 lun_number) != 16);
8806         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8807                 protocol_specific) != 24);
8808         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8809                 error_index) != 27);
8810         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8811                 cdb) != 32);
8812         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8813                 timeout) != 60);
8814         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8815                 sg_descriptors) != 64);
8816         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
8817                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8818
8819         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8820                 header.iu_type) != 0);
8821         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8822                 header.iu_length) != 2);
8823         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8824                 header.response_queue_id) != 4);
8825         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8826                 header.work_area) != 6);
8827         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8828                 request_id) != 8);
8829         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8830                 nexus_id) != 12);
8831         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8832                 buffer_length) != 16);
8833         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8834                 data_encryption_key_index) != 22);
8835         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8836                 encrypt_tweak_lower) != 24);
8837         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8838                 encrypt_tweak_upper) != 28);
8839         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8840                 cdb) != 32);
8841         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8842                 error_index) != 48);
8843         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8844                 num_sg_descriptors) != 50);
8845         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8846                 cdb_length) != 51);
8847         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8848                 lun_number) != 52);
8849         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8850                 sg_descriptors) != 64);
8851         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
8852                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8853
8854         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8855                 header.iu_type) != 0);
8856         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8857                 header.iu_length) != 2);
8858         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8859                 request_id) != 8);
8860         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8861                 error_index) != 10);
8862
8863         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8864                 header.iu_type) != 0);
8865         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8866                 header.iu_length) != 2);
8867         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8868                 header.response_queue_id) != 4);
8869         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8870                 request_id) != 8);
8871         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8872                 data.report_event_configuration.buffer_length) != 12);
8873         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8874                 data.report_event_configuration.sg_descriptors) != 16);
8875         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8876                 data.set_event_configuration.global_event_oq_id) != 10);
8877         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8878                 data.set_event_configuration.buffer_length) != 12);
8879         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8880                 data.set_event_configuration.sg_descriptors) != 16);
8881
8882         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8883                 max_inbound_iu_length) != 6);
8884         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8885                 max_outbound_iu_length) != 14);
8886         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
8887
8888         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8889                 data_length) != 0);
8890         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8891                 iq_arbitration_priority_support_bitmask) != 8);
8892         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8893                 maximum_aw_a) != 9);
8894         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8895                 maximum_aw_b) != 10);
8896         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8897                 maximum_aw_c) != 11);
8898         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8899                 max_inbound_queues) != 16);
8900         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8901                 max_elements_per_iq) != 18);
8902         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8903                 max_iq_element_length) != 24);
8904         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8905                 min_iq_element_length) != 26);
8906         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8907                 max_outbound_queues) != 30);
8908         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8909                 max_elements_per_oq) != 32);
8910         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8911                 intr_coalescing_time_granularity) != 34);
8912         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8913                 max_oq_element_length) != 36);
8914         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8915                 min_oq_element_length) != 38);
8916         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8917                 iu_layer_descriptors) != 64);
8918         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
8919
8920         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8921                 event_type) != 0);
8922         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8923                 oq_id) != 2);
8924         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
8925
8926         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8927                 num_event_descriptors) != 2);
8928         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8929                 descriptors) != 4);
8930
8931         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
8932                 ARRAY_SIZE(pqi_supported_event_types));
8933
8934         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8935                 header.iu_type) != 0);
8936         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8937                 header.iu_length) != 2);
8938         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8939                 event_type) != 8);
8940         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8941                 event_id) != 10);
8942         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8943                 additional_event_id) != 12);
8944         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8945                 data) != 16);
8946         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
8947
8948         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8949                 header.iu_type) != 0);
8950         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8951                 header.iu_length) != 2);
8952         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8953                 event_type) != 8);
8954         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8955                 event_id) != 10);
8956         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8957                 additional_event_id) != 12);
8958         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
8959
8960         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8961                 header.iu_type) != 0);
8962         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8963                 header.iu_length) != 2);
8964         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8965                 request_id) != 8);
8966         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8967                 nexus_id) != 10);
8968         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8969                 timeout) != 14);
8970         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8971                 lun_number) != 16);
8972         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8973                 protocol_specific) != 24);
8974         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8975                 outbound_queue_id_to_manage) != 26);
8976         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8977                 request_id_to_manage) != 28);
8978         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8979                 task_management_function) != 30);
8980         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
8981
8982         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8983                 header.iu_type) != 0);
8984         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8985                 header.iu_length) != 2);
8986         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8987                 request_id) != 8);
8988         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8989                 nexus_id) != 10);
8990         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8991                 additional_response_info) != 12);
8992         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8993                 response_code) != 15);
8994         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
8995
8996         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8997                 configured_logical_drive_count) != 0);
8998         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8999                 configuration_signature) != 1);
9000         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9001                 firmware_version) != 5);
9002         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9003                 extended_logical_unit_count) != 154);
9004         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9005                 firmware_build_number) != 190);
9006         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
9007                 controller_mode) != 292);
9008
9009         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9010                 phys_bay_in_box) != 115);
9011         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9012                 device_type) != 120);
9013         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9014                 redundant_path_present_map) != 1736);
9015         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9016                 active_path_number) != 1738);
9017         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9018                 alternate_paths_phys_connector) != 1739);
9019         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9020                 alternate_paths_phys_box_on_port) != 1755);
9021         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
9022                 current_queue_depth_limit) != 1796);
9023         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
9024
9025         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
9026         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
9027         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
9028                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9029         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
9030                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9031         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
9032         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
9033                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9034         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
9035         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
9036                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
9037
9038         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
9039         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
9040                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
9041 }