drivers/scsi/smartpqi/smartpqi_init.c

   1 /*
   2  *    driver for Microsemi PQI-based storage controllers
   3  *    Copyright (c) 2016 Microsemi Corporation
   4  *    Copyright (c) 2016 PMC-Sierra, Inc.
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; version 2 of the License.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14  *
  15  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  16  *
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/rtc.h>
  26 #include <linux/bcd.h>
  27 #include <linux/cciss_ioctl.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_cmnd.h>
  30 #include <scsi/scsi_device.h>
  31 #include <scsi/scsi_eh.h>
  32 #include <scsi/scsi_transport_sas.h>
  33 #include <asm/unaligned.h>
  34 #include "smartpqi.h"
  35 #include "smartpqi_sis.h"
  36
  37 #if !defined(BUILD_TIMESTAMP)
  38 #define BUILD_TIMESTAMP
  39 #endif
  40
  41 #define DRIVER_VERSION          "0.9.13-370"
  42 #define DRIVER_MAJOR            0
  43 #define DRIVER_MINOR            9
  44 #define DRIVER_RELEASE          13
  45 #define DRIVER_REVISION         370
  46
  47 #define DRIVER_NAME             "Microsemi PQI Driver (v" DRIVER_VERSION ")"
  48 #define DRIVER_NAME_SHORT       "smartpqi"
  49
  50 MODULE_AUTHOR("Microsemi");
  51 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  52         DRIVER_VERSION);
  53 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  54 MODULE_VERSION(DRIVER_VERSION);
  55 MODULE_LICENSE("GPL");
  56
  57 #define PQI_ENABLE_MULTI_QUEUE_SUPPORT  0
  58
  59 static char *hpe_branded_controller = "HPE Smart Array Controller";
  60 static char *microsemi_branded_controller = "Microsemi Smart Family Controller";
  61
  62 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  64 static void pqi_scan_start(struct Scsi_Host *shost);
  65 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  66         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  67         struct pqi_io_request *io_request);
  68 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  69         struct pqi_iu_header *request, unsigned int flags,
  70         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  71 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  72         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  73         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  74         struct pqi_encryption_info *encryption_info);
  75
  76 /* for flags argument to pqi_submit_raid_request_synchronous() */
  77 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  78
  79 static struct scsi_transport_template *pqi_sas_transport_template;
  80
  81 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  82
  83 static int pqi_disable_device_id_wildcards;
  84 module_param_named(disable_device_id_wildcards,
  85         pqi_disable_device_id_wildcards, int, S_IRUGO | S_IWUSR);
  86 MODULE_PARM_DESC(disable_device_id_wildcards,
  87         "Disable device ID wildcards.");
  88
  89 static char *raid_levels[] = {
  90         "RAID-0",
  91         "RAID-4",
  92         "RAID-1(1+0)",
  93         "RAID-5",
  94         "RAID-5+1",
  95         "RAID-ADG",
  96         "RAID-1(ADM)",
  97 };
  98
  99 static char *pqi_raid_level_to_string(u8 raid_level)
 100 {
 101         if (raid_level < ARRAY_SIZE(raid_levels))
 102                 return raid_levels[raid_level];
 103
 104         return "";
 105 }
 106
 107 #define SA_RAID_0               0
 108 #define SA_RAID_4               1
 109 #define SA_RAID_1               2       /* also used for RAID 10 */
 110 #define SA_RAID_5               3       /* also used for RAID 50 */
 111 #define SA_RAID_51              4
 112 #define SA_RAID_6               5       /* also used for RAID 60 */
 113 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 114 #define SA_RAID_MAX             SA_RAID_ADM
 115 #define SA_RAID_UNKNOWN         0xff
 116
 117 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 118 {
 119         scmd->scsi_done(scmd);
 120 }
 121
 122 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 123 {
 124         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 125 }
 126
 127 static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
 128 {
 129         void *hostdata = shost_priv(shost);
 130
 131         return *((struct pqi_ctrl_info **)hostdata);
 132 }
 133
 134 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 135 {
 136         return !device->is_physical_device;
 137 }
 138
 139 static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 140 {
 141         return !ctrl_info->controller_online;
 142 }
 143
 144 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 145 {
 146         if (ctrl_info->controller_online)
 147                 if (!sis_is_firmware_running(ctrl_info))
 148                         pqi_take_ctrl_offline(ctrl_info);
 149 }
 150
 151 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 152 {
 153         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 154 }
 155
 156 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 157         struct pqi_ctrl_info *ctrl_info)
 158 {
 159         return sis_read_driver_scratch(ctrl_info);
 160 }
 161
 162 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 163         enum pqi_ctrl_mode mode)
 164 {
 165         sis_write_driver_scratch(ctrl_info, mode);
 166 }
 167
 168 #define PQI_RESCAN_WORK_INTERVAL        (10 * HZ)
 169
 170 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 171 {
 172         schedule_delayed_work(&ctrl_info->rescan_work,
 173                 PQI_RESCAN_WORK_INTERVAL);
 174 }
 175
 176 static int pqi_map_single(struct pci_dev *pci_dev,
 177         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 178         size_t buffer_length, int data_direction)
 179 {
 180         dma_addr_t bus_address;
 181
 182         if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
 183                 return 0;
 184
 185         bus_address = pci_map_single(pci_dev, buffer, buffer_length,
 186                 data_direction);
 187         if (pci_dma_mapping_error(pci_dev, bus_address))
 188                 return -ENOMEM;
 189
 190         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 191         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 192         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 193
 194         return 0;
 195 }
 196
 197 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 198         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 199         int data_direction)
 200 {
 201         int i;
 202
 203         if (data_direction == PCI_DMA_NONE)
 204                 return;
 205
 206         for (i = 0; i < num_descriptors; i++)
 207                 pci_unmap_single(pci_dev,
 208                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 209                         get_unaligned_le32(&descriptors[i].length),
 210                         data_direction);
 211 }
 212
 213 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 214         struct pqi_raid_path_request *request, u8 cmd,
 215         u8 *scsi3addr, void *buffer, size_t buffer_length,
 216         u16 vpd_page, int *pci_direction)
 217 {
 218         u8 *cdb;
 219         int pci_dir;
 220
 221         memset(request, 0, sizeof(*request));
 222
 223         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 224         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 225                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 226                 &request->header.iu_length);
 227         put_unaligned_le32(buffer_length, &request->buffer_length);
 228         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 229         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 230         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 231
 232         cdb = request->cdb;
 233
 234         switch (cmd) {
 235         case INQUIRY:
 236                 request->data_direction = SOP_READ_FLAG;
 237                 cdb[0] = INQUIRY;
 238                 if (vpd_page & VPD_PAGE) {
 239                         cdb[1] = 0x1;
 240                         cdb[2] = (u8)vpd_page;
 241                 }
 242                 cdb[4] = (u8)buffer_length;
 243                 break;
 244         case CISS_REPORT_LOG:
 245         case CISS_REPORT_PHYS:
 246                 request->data_direction = SOP_READ_FLAG;
 247                 cdb[0] = cmd;
 248                 if (cmd == CISS_REPORT_PHYS)
 249                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 250                 else
 251                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 252                 put_unaligned_be32(buffer_length, &cdb[6]);
 253                 break;
 254         case CISS_GET_RAID_MAP:
 255                 request->data_direction = SOP_READ_FLAG;
 256                 cdb[0] = CISS_READ;
 257                 cdb[1] = CISS_GET_RAID_MAP;
 258                 put_unaligned_be32(buffer_length, &cdb[6]);
 259                 break;
 260         case SA_CACHE_FLUSH:
 261                 request->data_direction = SOP_WRITE_FLAG;
 262                 cdb[0] = BMIC_WRITE;
 263                 cdb[6] = BMIC_CACHE_FLUSH;
 264                 put_unaligned_be16(buffer_length, &cdb[7]);
 265                 break;
 266         case BMIC_IDENTIFY_CONTROLLER:
 267         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 268                 request->data_direction = SOP_READ_FLAG;
 269                 cdb[0] = BMIC_READ;
 270                 cdb[6] = cmd;
 271                 put_unaligned_be16(buffer_length, &cdb[7]);
 272                 break;
 273         case BMIC_WRITE_HOST_WELLNESS:
 274                 request->data_direction = SOP_WRITE_FLAG;
 275                 cdb[0] = BMIC_WRITE;
 276                 cdb[6] = cmd;
 277                 put_unaligned_be16(buffer_length, &cdb[7]);
 278                 break;
 279         default:
 280                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 281                         cmd);
 282                 WARN_ON(cmd);
 283                 break;
 284         }
 285
 286         switch (request->data_direction) {
 287         case SOP_READ_FLAG:
 288                 pci_dir = PCI_DMA_FROMDEVICE;
 289                 break;
 290         case SOP_WRITE_FLAG:
 291                 pci_dir = PCI_DMA_TODEVICE;
 292                 break;
 293         case SOP_NO_DIRECTION_FLAG:
 294                 pci_dir = PCI_DMA_NONE;
 295                 break;
 296         default:
 297                 pci_dir = PCI_DMA_BIDIRECTIONAL;
 298                 break;
 299         }
 300
 301         *pci_direction = pci_dir;
 302
 303         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 304                 buffer, buffer_length, pci_dir);
 305 }
 306
 307 static struct pqi_io_request *pqi_alloc_io_request(
 308         struct pqi_ctrl_info *ctrl_info)
 309 {
 310         struct pqi_io_request *io_request;
 311         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 312
 313         while (1) {
 314                 io_request = &ctrl_info->io_request_pool[i];
 315                 if (atomic_inc_return(&io_request->refcount) == 1)
 316                         break;
 317                 atomic_dec(&io_request->refcount);
 318                 i = (i + 1) % ctrl_info->max_io_slots;
 319         }
 320
 321         /* benignly racy */
 322         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 323
 324         io_request->scmd = NULL;
 325         io_request->status = 0;
 326         io_request->error_info = NULL;
 327
 328         return io_request;
 329 }
 330
 331 static void pqi_free_io_request(struct pqi_io_request *io_request)
 332 {
 333         atomic_dec(&io_request->refcount);
 334 }
 335
 336 static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 337         struct bmic_identify_controller *buffer)
 338 {
 339         int rc;
 340         int pci_direction;
 341         struct pqi_raid_path_request request;
 342
 343         rc = pqi_build_raid_path_request(ctrl_info, &request,
 344                 BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
 345                 sizeof(*buffer), 0, &pci_direction);
 346         if (rc)
 347                 return rc;
 348
 349         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 350                 NULL, NO_TIMEOUT);
 351
 352         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 353                 pci_direction);
 354
 355         return rc;
 356 }
 357
 358 static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 359         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 360 {
 361         int rc;
 362         int pci_direction;
 363         struct pqi_raid_path_request request;
 364
 365         rc = pqi_build_raid_path_request(ctrl_info, &request,
 366                 INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
 367                 &pci_direction);
 368         if (rc)
 369                 return rc;
 370
 371         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 372                 NULL, NO_TIMEOUT);
 373
 374         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 375                 pci_direction);
 376
 377         return rc;
 378 }
 379
 380 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 381         struct pqi_scsi_dev *device,
 382         struct bmic_identify_physical_device *buffer,
 383         size_t buffer_length)
 384 {
 385         int rc;
 386         int pci_direction;
 387         u16 bmic_device_index;
 388         struct pqi_raid_path_request request;
 389
 390         rc = pqi_build_raid_path_request(ctrl_info, &request,
 391                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 392                 buffer_length, 0, &pci_direction);
 393         if (rc)
 394                 return rc;
 395
 396         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 397         request.cdb[2] = (u8)bmic_device_index;
 398         request.cdb[9] = (u8)(bmic_device_index >> 8);
 399
 400         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 401                 0, NULL, NO_TIMEOUT);
 402
 403         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 404                 pci_direction);
 405
 406         return rc;
 407 }
 408
 409 #define SA_CACHE_FLUSH_BUFFER_LENGTH    4
 410
 411 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
 412 {
 413         int rc;
 414         struct pqi_raid_path_request request;
 415         int pci_direction;
 416         u8 *buffer;
 417
 418         /*
 419          * Don't bother trying to flush the cache if the controller is
 420          * locked up.
 421          */
 422         if (pqi_ctrl_offline(ctrl_info))
 423                 return -ENXIO;
 424
 425         buffer = kzalloc(SA_CACHE_FLUSH_BUFFER_LENGTH, GFP_KERNEL);
 426         if (!buffer)
 427                 return -ENOMEM;
 428
 429         rc = pqi_build_raid_path_request(ctrl_info, &request,
 430                 SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
 431                 SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
 432         if (rc)
 433                 goto out;
 434
 435         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 436                 0, NULL, NO_TIMEOUT);
 437
 438         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 439                 pci_direction);
 440
 441 out:
 442         kfree(buffer);
 443
 444         return rc;
 445 }
 446
 447 static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 448         void *buffer, size_t buffer_length)
 449 {
 450         int rc;
 451         struct pqi_raid_path_request request;
 452         int pci_direction;
 453
 454         rc = pqi_build_raid_path_request(ctrl_info, &request,
 455                 BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 456                 buffer_length, 0, &pci_direction);
 457         if (rc)
 458                 return rc;
 459
 460         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 461                 0, NULL, NO_TIMEOUT);
 462
 463         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 464                 pci_direction);
 465
 466         return rc;
 467 }
 468
 469 #pragma pack(1)
 470
 471 struct bmic_host_wellness_driver_version {
 472         u8      start_tag[4];
 473         u8      driver_version_tag[2];
 474         __le16  driver_version_length;
 475         char    driver_version[32];
 476         u8      end_tag[2];
 477 };
 478
 479 #pragma pack()
 480
 481 static int pqi_write_driver_version_to_host_wellness(
 482         struct pqi_ctrl_info *ctrl_info)
 483 {
 484         int rc;
 485         struct bmic_host_wellness_driver_version *buffer;
 486         size_t buffer_length;
 487
 488         buffer_length = sizeof(*buffer);
 489
 490         buffer = kmalloc(buffer_length, GFP_KERNEL);
 491         if (!buffer)
 492                 return -ENOMEM;
 493
 494         buffer->start_tag[0] = '<';
 495         buffer->start_tag[1] = 'H';
 496         buffer->start_tag[2] = 'W';
 497         buffer->start_tag[3] = '>';
 498         buffer->driver_version_tag[0] = 'D';
 499         buffer->driver_version_tag[1] = 'V';
 500         put_unaligned_le16(sizeof(buffer->driver_version),
 501                 &buffer->driver_version_length);
 502         strncpy(buffer->driver_version, DRIVER_VERSION,
 503                 sizeof(buffer->driver_version) - 1);
 504         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 505         buffer->end_tag[0] = 'Z';
 506         buffer->end_tag[1] = 'Z';
 507
 508         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 509
 510         kfree(buffer);
 511
 512         return rc;
 513 }
 514
 515 #pragma pack(1)
 516
 517 struct bmic_host_wellness_time {
 518         u8      start_tag[4];
 519         u8      time_tag[2];
 520         __le16  time_length;
 521         u8      time[8];
 522         u8      dont_write_tag[2];
 523         u8      end_tag[2];
 524 };
 525
 526 #pragma pack()
 527
 528 static int pqi_write_current_time_to_host_wellness(
 529         struct pqi_ctrl_info *ctrl_info)
 530 {
 531         int rc;
 532         struct bmic_host_wellness_time *buffer;
 533         size_t buffer_length;
 534         time64_t local_time;
 535         unsigned int year;
 536         struct timeval time;
 537         struct rtc_time tm;
 538
 539         buffer_length = sizeof(*buffer);
 540
 541         buffer = kmalloc(buffer_length, GFP_KERNEL);
 542         if (!buffer)
 543                 return -ENOMEM;
 544
 545         buffer->start_tag[0] = '<';
 546         buffer->start_tag[1] = 'H';
 547         buffer->start_tag[2] = 'W';
 548         buffer->start_tag[3] = '>';
 549         buffer->time_tag[0] = 'T';
 550         buffer->time_tag[1] = 'D';
 551         put_unaligned_le16(sizeof(buffer->time),
 552                 &buffer->time_length);
 553
 554         do_gettimeofday(&time);
 555         local_time = time.tv_sec - (sys_tz.tz_minuteswest * 60);
 556         rtc_time64_to_tm(local_time, &tm);
 557         year = tm.tm_year + 1900;
 558
 559         buffer->time[0] = bin2bcd(tm.tm_hour);
 560         buffer->time[1] = bin2bcd(tm.tm_min);
 561         buffer->time[2] = bin2bcd(tm.tm_sec);
 562         buffer->time[3] = 0;
 563         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 564         buffer->time[5] = bin2bcd(tm.tm_mday);
 565         buffer->time[6] = bin2bcd(year / 100);
 566         buffer->time[7] = bin2bcd(year % 100);
 567
 568         buffer->dont_write_tag[0] = 'D';
 569         buffer->dont_write_tag[1] = 'W';
 570         buffer->end_tag[0] = 'Z';
 571         buffer->end_tag[1] = 'Z';
 572
 573         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 574
 575         kfree(buffer);
 576
 577         return rc;
 578 }
 579
 580 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * HZ)
 581
 582 static void pqi_update_time_worker(struct work_struct *work)
 583 {
 584         int rc;
 585         struct pqi_ctrl_info *ctrl_info;
 586
 587         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 588                 update_time_work);
 589
 590         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 591         if (rc)
 592                 dev_warn(&ctrl_info->pci_dev->dev,
 593                         "error updating time on controller\n");
 594
 595         schedule_delayed_work(&ctrl_info->update_time_work,
 596                 PQI_UPDATE_TIME_WORK_INTERVAL);
 597 }
 598
 599 static inline void pqi_schedule_update_time_worker(
 600         struct pqi_ctrl_info *ctrl_info)
 601 {
 602         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 603 }
 604
 605 static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 606         void *buffer, size_t buffer_length)
 607 {
 608         int rc;
 609         int pci_direction;
 610         struct pqi_raid_path_request request;
 611
 612         rc = pqi_build_raid_path_request(ctrl_info, &request,
 613                 cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 614         if (rc)
 615                 return rc;
 616
 617         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 618                 NULL, NO_TIMEOUT);
 619
 620         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 621                 pci_direction);
 622
 623         return rc;
 624 }
 625
 626 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 627         void **buffer)
 628 {
 629         int rc;
 630         size_t lun_list_length;
 631         size_t lun_data_length;
 632         size_t new_lun_list_length;
 633         void *lun_data = NULL;
 634         struct report_lun_header *report_lun_header;
 635
 636         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 637         if (!report_lun_header) {
 638                 rc = -ENOMEM;
 639                 goto out;
 640         }
 641
 642         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 643                 sizeof(*report_lun_header));
 644         if (rc)
 645                 goto out;
 646
 647         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 648
 649 again:
 650         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 651
 652         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 653         if (!lun_data) {
 654                 rc = -ENOMEM;
 655                 goto out;
 656         }
 657
 658         if (lun_list_length == 0) {
 659                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 660                 goto out;
 661         }
 662
 663         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 664         if (rc)
 665                 goto out;
 666
 667         new_lun_list_length = get_unaligned_be32(
 668                 &((struct report_lun_header *)lun_data)->list_length);
 669
 670         if (new_lun_list_length > lun_list_length) {
 671                 lun_list_length = new_lun_list_length;
 672                 kfree(lun_data);
 673                 goto again;
 674         }
 675
 676 out:
 677         kfree(report_lun_header);
 678
 679         if (rc) {
 680                 kfree(lun_data);
 681                 lun_data = NULL;
 682         }
 683
 684         *buffer = lun_data;
 685
 686         return rc;
 687 }
 688
 689 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 690         void **buffer)
 691 {
 692         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 693                 buffer);
 694 }
 695
 696 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 697         void **buffer)
 698 {
 699         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 700 }
 701
 702 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 703         struct report_phys_lun_extended **physdev_list,
 704         struct report_log_lun_extended **logdev_list)
 705 {
 706         int rc;
 707         size_t logdev_list_length;
 708         size_t logdev_data_length;
 709         struct report_log_lun_extended *internal_logdev_list;
 710         struct report_log_lun_extended *logdev_data;
 711         struct report_lun_header report_lun_header;
 712
 713         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 714         if (rc)
 715                 dev_err(&ctrl_info->pci_dev->dev,
 716                         "report physical LUNs failed\n");
 717
 718         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 719         if (rc)
 720                 dev_err(&ctrl_info->pci_dev->dev,
 721                         "report logical LUNs failed\n");
 722
 723         /*
 724          * Tack the controller itself onto the end of the logical device list.
 725          */
 726
 727         logdev_data = *logdev_list;
 728
 729         if (logdev_data) {
 730                 logdev_list_length =
 731                         get_unaligned_be32(&logdev_data->header.list_length);
 732         } else {
 733                 memset(&report_lun_header, 0, sizeof(report_lun_header));
 734                 logdev_data =
 735                         (struct report_log_lun_extended *)&report_lun_header;
 736                 logdev_list_length = 0;
 737         }
 738
 739         logdev_data_length = sizeof(struct report_lun_header) +
 740                 logdev_list_length;
 741
 742         internal_logdev_list = kmalloc(logdev_data_length +
 743                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
 744         if (!internal_logdev_list) {
 745                 kfree(*logdev_list);
 746                 *logdev_list = NULL;
 747                 return -ENOMEM;
 748         }
 749
 750         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 751         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 752                 sizeof(struct report_log_lun_extended_entry));
 753         put_unaligned_be32(logdev_list_length +
 754                 sizeof(struct report_log_lun_extended_entry),
 755                 &internal_logdev_list->header.list_length);
 756
 757         kfree(*logdev_list);
 758         *logdev_list = internal_logdev_list;
 759
 760         return 0;
 761 }
 762
 763 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 764         int bus, int target, int lun)
 765 {
 766         device->bus = bus;
 767         device->target = target;
 768         device->lun = lun;
 769 }
 770
 771 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 772 {
 773         u8 *scsi3addr;
 774         u32 lunid;
 775
 776         scsi3addr = device->scsi3addr;
 777         lunid = get_unaligned_le32(scsi3addr);
 778
 779         if (pqi_is_hba_lunid(scsi3addr)) {
 780                 /* The specified device is the controller. */
 781                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 782                 device->target_lun_valid = true;
 783                 return;
 784         }
 785
 786         if (pqi_is_logical_device(device)) {
 787                 pqi_set_bus_target_lun(device, PQI_RAID_VOLUME_BUS, 0,
 788                         lunid & 0x3fff);
 789                 device->target_lun_valid = true;
 790                 return;
 791         }
 792
 793         /*
 794          * Defer target and LUN assignment for non-controller physical devices
 795          * because the SAS transport layer will make these assignments later.
 796          */
 797         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 798 }
 799
 800 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
 801         struct pqi_scsi_dev *device)
 802 {
 803         int rc;
 804         u8 raid_level;
 805         u8 *buffer;
 806
 807         raid_level = SA_RAID_UNKNOWN;
 808
 809         buffer = kmalloc(64, GFP_KERNEL);
 810         if (buffer) {
 811                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
 812                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
 813                 if (rc == 0) {
 814                         raid_level = buffer[8];
 815                         if (raid_level > SA_RAID_MAX)
 816                                 raid_level = SA_RAID_UNKNOWN;
 817                 }
 818                 kfree(buffer);
 819         }
 820
 821         device->raid_level = raid_level;
 822 }
 823
 824 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
 825         struct pqi_scsi_dev *device, struct raid_map *raid_map)
 826 {
 827         char *err_msg;
 828         u32 raid_map_size;
 829         u32 r5or6_blocks_per_row;
 830         unsigned int num_phys_disks;
 831         unsigned int num_raid_map_entries;
 832
 833         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
 834
 835         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
 836                 err_msg = "RAID map too small";
 837                 goto bad_raid_map;
 838         }
 839
 840         if (raid_map_size > sizeof(*raid_map)) {
 841                 err_msg = "RAID map too large";
 842                 goto bad_raid_map;
 843         }
 844
 845         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
 846                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
 847                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
 848         num_raid_map_entries = num_phys_disks *
 849                 get_unaligned_le16(&raid_map->row_cnt);
 850
 851         if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
 852                 err_msg = "invalid number of map entries in RAID map";
 853                 goto bad_raid_map;
 854         }
 855
 856         if (device->raid_level == SA_RAID_1) {
 857                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
 858                         err_msg = "invalid RAID-1 map";
 859                         goto bad_raid_map;
 860                 }
 861         } else if (device->raid_level == SA_RAID_ADM) {
 862                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
 863                         err_msg = "invalid RAID-1(ADM) map";
 864                         goto bad_raid_map;
 865                 }
 866         } else if ((device->raid_level == SA_RAID_5 ||
 867                 device->raid_level == SA_RAID_6) &&
 868                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
 869                 /* RAID 50/60 */
 870                 r5or6_blocks_per_row =
 871                         get_unaligned_le16(&raid_map->strip_size) *
 872                         get_unaligned_le16(&raid_map->data_disks_per_row);
 873                 if (r5or6_blocks_per_row == 0) {
 874                         err_msg = "invalid RAID-5 or RAID-6 map";
 875                         goto bad_raid_map;
 876                 }
 877         }
 878
 879         return 0;
 880
 881 bad_raid_map:
 882         dev_warn(&ctrl_info->pci_dev->dev, "%s\n", err_msg);
 883
 884         return -EINVAL;
 885 }
 886
 887 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
 888         struct pqi_scsi_dev *device)
 889 {
 890         int rc;
 891         int pci_direction;
 892         struct pqi_raid_path_request request;
 893         struct raid_map *raid_map;
 894
 895         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
 896         if (!raid_map)
 897                 return -ENOMEM;
 898
 899         rc = pqi_build_raid_path_request(ctrl_info, &request,
 900                 CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
 901                 sizeof(*raid_map), 0, &pci_direction);
 902         if (rc)
 903                 goto error;
 904
 905         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 906                 NULL, NO_TIMEOUT);
 907
 908         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 909                 pci_direction);
 910
 911         if (rc)
 912                 goto error;
 913
 914         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
 915         if (rc)
 916                 goto error;
 917
 918         device->raid_map = raid_map;
 919
 920         return 0;
 921
 922 error:
 923         kfree(raid_map);
 924
 925         return rc;
 926 }
 927
 928 static void pqi_get_offload_status(struct pqi_ctrl_info *ctrl_info,
 929         struct pqi_scsi_dev *device)
 930 {
 931         int rc;
 932         u8 *buffer;
 933         u8 offload_status;
 934
 935         buffer = kmalloc(64, GFP_KERNEL);
 936         if (!buffer)
 937                 return;
 938
 939         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
 940                 VPD_PAGE | CISS_VPD_LV_OFFLOAD_STATUS, buffer, 64);
 941         if (rc)
 942                 goto out;
 943
 944 #define OFFLOAD_STATUS_BYTE     4
 945 #define OFFLOAD_CONFIGURED_BIT  0x1
 946 #define OFFLOAD_ENABLED_BIT     0x2
 947
 948         offload_status = buffer[OFFLOAD_STATUS_BYTE];
 949         device->offload_configured =
 950                 !!(offload_status & OFFLOAD_CONFIGURED_BIT);
 951         if (device->offload_configured) {
 952                 device->offload_enabled_pending =
 953                         !!(offload_status & OFFLOAD_ENABLED_BIT);
 954                 if (pqi_get_raid_map(ctrl_info, device))
 955                         device->offload_enabled_pending = false;
 956         }
 957
 958 out:
 959         kfree(buffer);
 960 }
 961
 962 /*
 963  * Use vendor-specific VPD to determine online/offline status of a volume.
 964  */
 965
 966 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
 967         struct pqi_scsi_dev *device)
 968 {
 969         int rc;
 970         size_t page_length;
 971         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
 972         bool volume_offline = true;
 973         u32 volume_flags;
 974         struct ciss_vpd_logical_volume_status *vpd;
 975
 976         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
 977         if (!vpd)
 978                 goto no_buffer;
 979
 980         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
 981                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
 982         if (rc)
 983                 goto out;
 984
 985         page_length = offsetof(struct ciss_vpd_logical_volume_status,
 986                 volume_status) + vpd->page_length;
 987         if (page_length < sizeof(*vpd))
 988                 goto out;
 989
 990         volume_status = vpd->volume_status;
 991         volume_flags = get_unaligned_be32(&vpd->flags);
 992         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
 993
 994 out:
 995         kfree(vpd);
 996 no_buffer:
 997         device->volume_status = volume_status;
 998         device->volume_offline = volume_offline;
 999 }
1000
1001 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1002         struct pqi_scsi_dev *device)
1003 {
1004         int rc;
1005         u8 *buffer;
1006
1007         buffer = kmalloc(64, GFP_KERNEL);
1008         if (!buffer)
1009                 return -ENOMEM;
1010
1011         /* Send an inquiry to the device to see what it is. */
1012         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1013         if (rc)
1014                 goto out;
1015
1016         scsi_sanitize_inquiry_string(&buffer[8], 8);
1017         scsi_sanitize_inquiry_string(&buffer[16], 16);
1018
1019         device->devtype = buffer[0] & 0x1f;
1020         memcpy(device->vendor, &buffer[8],
1021                 sizeof(device->vendor));
1022         memcpy(device->model, &buffer[16],
1023                 sizeof(device->model));
1024
1025         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1026                 pqi_get_raid_level(ctrl_info, device);
1027                 pqi_get_offload_status(ctrl_info, device);
1028                 pqi_get_volume_status(ctrl_info, device);
1029         }
1030
1031 out:
1032         kfree(buffer);
1033
1034         return rc;
1035 }
1036
1037 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1038         struct pqi_scsi_dev *device,
1039         struct bmic_identify_physical_device *id_phys)
1040 {
1041         int rc;
1042
1043         memset(id_phys, 0, sizeof(*id_phys));
1044
1045         rc = pqi_identify_physical_device(ctrl_info, device,
1046                 id_phys, sizeof(*id_phys));
1047         if (rc) {
1048                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1049                 return;
1050         }
1051
1052         device->queue_depth =
1053                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1054         device->device_type = id_phys->device_type;
1055         device->active_path_index = id_phys->active_path_number;
1056         device->path_map = id_phys->redundant_path_present_map;
1057         memcpy(&device->box,
1058                 &id_phys->alternate_paths_phys_box_on_port,
1059                 sizeof(device->box));
1060         memcpy(&device->phys_connector,
1061                 &id_phys->alternate_paths_phys_connector,
1062                 sizeof(device->phys_connector));
1063         device->bay = id_phys->phys_bay_in_box;
1064 }
1065
1066 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1067         struct pqi_scsi_dev *device)
1068 {
1069         char *status;
1070         static const char unknown_state_str[] =
1071                 "Volume is in an unknown state (%u)";
1072         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1073
1074         switch (device->volume_status) {
1075         case CISS_LV_OK:
1076                 status = "Volume online";
1077                 break;
1078         case CISS_LV_FAILED:
1079                 status = "Volume failed";
1080                 break;
1081         case CISS_LV_NOT_CONFIGURED:
1082                 status = "Volume not configured";
1083                 break;
1084         case CISS_LV_DEGRADED:
1085                 status = "Volume degraded";
1086                 break;
1087         case CISS_LV_READY_FOR_RECOVERY:
1088                 status = "Volume ready for recovery operation";
1089                 break;
1090         case CISS_LV_UNDERGOING_RECOVERY:
1091                 status = "Volume undergoing recovery";
1092                 break;
1093         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1094                 status = "Wrong physical drive was replaced";
1095                 break;
1096         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1097                 status = "A physical drive not properly connected";
1098                 break;
1099         case CISS_LV_HARDWARE_OVERHEATING:
1100                 status = "Hardware is overheating";
1101                 break;
1102         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1103                 status = "Hardware has overheated";
1104                 break;
1105         case CISS_LV_UNDERGOING_EXPANSION:
1106                 status = "Volume undergoing expansion";
1107                 break;
1108         case CISS_LV_NOT_AVAILABLE:
1109                 status = "Volume waiting for transforming volume";
1110                 break;
1111         case CISS_LV_QUEUED_FOR_EXPANSION:
1112                 status = "Volume queued for expansion";
1113                 break;
1114         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1115                 status = "Volume disabled due to SCSI ID conflict";
1116                 break;
1117         case CISS_LV_EJECTED:
1118                 status = "Volume has been ejected";
1119                 break;
1120         case CISS_LV_UNDERGOING_ERASE:
1121                 status = "Volume undergoing background erase";
1122                 break;
1123         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1124                 status = "Volume ready for predictive spare rebuild";
1125                 break;
1126         case CISS_LV_UNDERGOING_RPI:
1127                 status = "Volume undergoing rapid parity initialization";
1128                 break;
1129         case CISS_LV_PENDING_RPI:
1130                 status = "Volume queued for rapid parity initialization";
1131                 break;
1132         case CISS_LV_ENCRYPTED_NO_KEY:
1133                 status = "Encrypted volume inaccessible - key not present";
1134                 break;
1135         case CISS_LV_UNDERGOING_ENCRYPTION:
1136                 status = "Volume undergoing encryption process";
1137                 break;
1138         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1139                 status = "Volume undergoing encryption re-keying process";
1140                 break;
1141         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1142                 status =
1143                         "Encrypted volume inaccessible - disabled on ctrl";
1144                 break;
1145         case CISS_LV_PENDING_ENCRYPTION:
1146                 status = "Volume pending migration to encrypted state";
1147                 break;
1148         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1149                 status = "Volume pending encryption rekeying";
1150                 break;
1151         case CISS_LV_NOT_SUPPORTED:
1152                 status = "Volume not supported on this controller";
1153                 break;
1154         case CISS_LV_STATUS_UNAVAILABLE:
1155                 status = "Volume status not available";
1156                 break;
1157         default:
1158                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1159                         unknown_state_str, device->volume_status);
1160                 status = unknown_state_buffer;
1161                 break;
1162         }
1163
1164         dev_info(&ctrl_info->pci_dev->dev,
1165                 "scsi %d:%d:%d:%d %s\n",
1166                 ctrl_info->scsi_host->host_no,
1167                 device->bus, device->target, device->lun, status);
1168 }
1169
1170 static struct pqi_scsi_dev *pqi_find_disk_by_aio_handle(
1171         struct pqi_ctrl_info *ctrl_info, u32 aio_handle)
1172 {
1173         struct pqi_scsi_dev *device;
1174
1175         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1176                 scsi_device_list_entry) {
1177                 if (device->devtype != TYPE_DISK && device->devtype != TYPE_ZBC)
1178                         continue;
1179                 if (pqi_is_logical_device(device))
1180                         continue;
1181                 if (device->aio_handle == aio_handle)
1182                         return device;
1183         }
1184
1185         return NULL;
1186 }
1187
1188 static void pqi_update_logical_drive_queue_depth(
1189         struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *logical_drive)
1190 {
1191         unsigned int i;
1192         struct raid_map *raid_map;
1193         struct raid_map_disk_data *disk_data;
1194         struct pqi_scsi_dev *phys_disk;
1195         unsigned int num_phys_disks;
1196         unsigned int num_raid_map_entries;
1197         unsigned int queue_depth;
1198
1199         logical_drive->queue_depth = PQI_LOGICAL_DRIVE_DEFAULT_MAX_QUEUE_DEPTH;
1200
1201         raid_map = logical_drive->raid_map;
1202         if (!raid_map)
1203                 return;
1204
1205         disk_data = raid_map->disk_data;
1206         num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1207                 (get_unaligned_le16(&raid_map->data_disks_per_row) +
1208                 get_unaligned_le16(&raid_map->metadata_disks_per_row));
1209         num_raid_map_entries = num_phys_disks *
1210                 get_unaligned_le16(&raid_map->row_cnt);
1211
1212         queue_depth = 0;
1213         for (i = 0; i < num_raid_map_entries; i++) {
1214                 phys_disk = pqi_find_disk_by_aio_handle(ctrl_info,
1215                         disk_data[i].aio_handle);
1216
1217                 if (!phys_disk) {
1218                         dev_warn(&ctrl_info->pci_dev->dev,
1219                                 "failed to find physical disk for logical drive %016llx\n",
1220                                 get_unaligned_be64(logical_drive->scsi3addr));
1221                         logical_drive->offload_enabled = false;
1222                         logical_drive->offload_enabled_pending = false;
1223                         kfree(raid_map);
1224                         logical_drive->raid_map = NULL;
1225                         return;
1226                 }
1227
1228                 queue_depth += phys_disk->queue_depth;
1229         }
1230
1231         logical_drive->queue_depth = queue_depth;
1232 }
1233
1234 static void pqi_update_all_logical_drive_queue_depths(
1235         struct pqi_ctrl_info *ctrl_info)
1236 {
1237         struct pqi_scsi_dev *device;
1238
1239         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1240                 scsi_device_list_entry) {
1241                 if (device->devtype != TYPE_DISK && device->devtype != TYPE_ZBC)
1242                         continue;
1243                 if (!pqi_is_logical_device(device))
1244                         continue;
1245                 pqi_update_logical_drive_queue_depth(ctrl_info, device);
1246         }
1247 }
1248
1249 static void pqi_rescan_worker(struct work_struct *work)
1250 {
1251         struct pqi_ctrl_info *ctrl_info;
1252
1253         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1254                 rescan_work);
1255
1256         pqi_scan_scsi_devices(ctrl_info);
1257 }
1258
1259 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1260         struct pqi_scsi_dev *device)
1261 {
1262         int rc;
1263
1264         if (pqi_is_logical_device(device))
1265                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1266                         device->target, device->lun);
1267         else
1268                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1269
1270         return rc;
1271 }
1272
1273 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1274         struct pqi_scsi_dev *device)
1275 {
1276         if (pqi_is_logical_device(device))
1277                 scsi_remove_device(device->sdev);
1278         else
1279                 pqi_remove_sas_device(device);
1280 }
1281
1282 /* Assumes the SCSI device list lock is held. */
1283
1284 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1285         int bus, int target, int lun)
1286 {
1287         struct pqi_scsi_dev *device;
1288
1289         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1290                 scsi_device_list_entry)
1291                 if (device->bus == bus && device->target == target &&
1292                         device->lun == lun)
1293                         return device;
1294
1295         return NULL;
1296 }
1297
1298 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1299         struct pqi_scsi_dev *dev2)
1300 {
1301         if (dev1->is_physical_device != dev2->is_physical_device)
1302                 return false;
1303
1304         if (dev1->is_physical_device)
1305                 return dev1->wwid == dev2->wwid;
1306
1307         return memcmp(dev1->volume_id, dev2->volume_id,
1308                 sizeof(dev1->volume_id)) == 0;
1309 }
1310
1311 enum pqi_find_result {
1312         DEVICE_NOT_FOUND,
1313         DEVICE_CHANGED,
1314         DEVICE_SAME,
1315 };
1316
1317 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1318         struct pqi_scsi_dev *device_to_find,
1319         struct pqi_scsi_dev **matching_device)
1320 {
1321         struct pqi_scsi_dev *device;
1322
1323         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1324                 scsi_device_list_entry) {
1325                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1326                         device->scsi3addr)) {
1327                         *matching_device = device;
1328                         if (pqi_device_equal(device_to_find, device)) {
1329                                 if (device_to_find->volume_offline)
1330                                         return DEVICE_CHANGED;
1331                                 return DEVICE_SAME;
1332                         }
1333                         return DEVICE_CHANGED;
1334                 }
1335         }
1336
1337         return DEVICE_NOT_FOUND;
1338 }
1339
1340 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1341         char *action, struct pqi_scsi_dev *device)
1342 {
1343         dev_info(&ctrl_info->pci_dev->dev,
1344                 "%s scsi %d:%d:%d:%d: %s %.8s %.16s %-12s SSDSmartPathCap%c En%c Exp%c qd=%d\n",
1345                 action,
1346                 ctrl_info->scsi_host->host_no,
1347                 device->bus,
1348                 device->target,
1349                 device->lun,
1350                 scsi_device_type(device->devtype),
1351                 device->vendor,
1352                 device->model,
1353                 pqi_raid_level_to_string(device->raid_level),
1354                 device->offload_configured ? '+' : '-',
1355                 device->offload_enabled_pending ? '+' : '-',
1356                 device->expose_device ? '+' : '-',
1357                 device->queue_depth);
1358 }
1359
1360 /* Assumes the SCSI device list lock is held. */
1361
1362 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1363         struct pqi_scsi_dev *new_device)
1364 {
1365         existing_device->devtype = new_device->devtype;
1366         existing_device->device_type = new_device->device_type;
1367         existing_device->bus = new_device->bus;
1368         if (new_device->target_lun_valid) {
1369                 existing_device->target = new_device->target;
1370                 existing_device->lun = new_device->lun;
1371                 existing_device->target_lun_valid = true;
1372         }
1373
1374         /* By definition, the scsi3addr and wwid fields are already the same. */
1375
1376         existing_device->is_physical_device = new_device->is_physical_device;
1377         existing_device->expose_device = new_device->expose_device;
1378         existing_device->no_uld_attach = new_device->no_uld_attach;
1379         existing_device->aio_enabled = new_device->aio_enabled;
1380         memcpy(existing_device->vendor, new_device->vendor,
1381                 sizeof(existing_device->vendor));
1382         memcpy(existing_device->model, new_device->model,
1383                 sizeof(existing_device->model));
1384         existing_device->sas_address = new_device->sas_address;
1385         existing_device->raid_level = new_device->raid_level;
1386         existing_device->queue_depth = new_device->queue_depth;
1387         existing_device->aio_handle = new_device->aio_handle;
1388         existing_device->volume_status = new_device->volume_status;
1389         existing_device->active_path_index = new_device->active_path_index;
1390         existing_device->path_map = new_device->path_map;
1391         existing_device->bay = new_device->bay;
1392         memcpy(existing_device->box, new_device->box,
1393                 sizeof(existing_device->box));
1394         memcpy(existing_device->phys_connector, new_device->phys_connector,
1395                 sizeof(existing_device->phys_connector));
1396         existing_device->offload_configured = new_device->offload_configured;
1397         existing_device->offload_enabled = false;
1398         existing_device->offload_enabled_pending =
1399                 new_device->offload_enabled_pending;
1400         existing_device->offload_to_mirror = 0;
1401         kfree(existing_device->raid_map);
1402         existing_device->raid_map = new_device->raid_map;
1403
1404         /* To prevent this from being freed later. */
1405         new_device->raid_map = NULL;
1406 }
1407
1408 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1409 {
1410         if (device) {
1411                 kfree(device->raid_map);
1412                 kfree(device);
1413         }
1414 }
1415
1416 /*
1417  * Called when exposing a new device to the OS fails in order to re-adjust
1418  * our internal SCSI device list to match the SCSI ML's view.
1419  */
1420
1421 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1422         struct pqi_scsi_dev *device)
1423 {
1424         unsigned long flags;
1425
1426         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1427         list_del(&device->scsi_device_list_entry);
1428         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1429
1430         /* Allow the device structure to be freed later. */
1431         device->keep_device = false;
1432 }
1433
1434 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1435         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1436 {
1437         int rc;
1438         unsigned int i;
1439         unsigned long flags;
1440         enum pqi_find_result find_result;
1441         struct pqi_scsi_dev *device;
1442         struct pqi_scsi_dev *next;
1443         struct pqi_scsi_dev *matching_device;
1444         struct list_head add_list;
1445         struct list_head delete_list;
1446
1447         INIT_LIST_HEAD(&add_list);
1448         INIT_LIST_HEAD(&delete_list);
1449
1450         /*
1451          * The idea here is to do as little work as possible while holding the
1452          * spinlock.  That's why we go to great pains to defer anything other
1453          * than updating the internal device list until after we release the
1454          * spinlock.
1455          */
1456
1457         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1458
1459         /* Assume that all devices in the existing list have gone away. */
1460         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1461                 scsi_device_list_entry)
1462                 device->device_gone = true;
1463
1464         for (i = 0; i < num_new_devices; i++) {
1465                 device = new_device_list[i];
1466
1467                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1468                                                 &matching_device);
1469
1470                 switch (find_result) {
1471                 case DEVICE_SAME:
1472                         /*
1473                          * The newly found device is already in the existing
1474                          * device list.
1475                          */
1476                         device->new_device = false;
1477                         matching_device->device_gone = false;
1478                         pqi_scsi_update_device(matching_device, device);
1479                         break;
1480                 case DEVICE_NOT_FOUND:
1481                         /*
1482                          * The newly found device is NOT in the existing device
1483                          * list.
1484                          */
1485                         device->new_device = true;
1486                         break;
1487                 case DEVICE_CHANGED:
1488                         /*
1489                          * The original device has gone away and we need to add
1490                          * the new device.
1491                          */
1492                         device->new_device = true;
1493                         break;
1494                 default:
1495                         WARN_ON(find_result);
1496                         break;
1497                 }
1498         }
1499
1500         /* Process all devices that have gone away. */
1501         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1502                 scsi_device_list_entry) {
1503                 if (device->device_gone) {
1504                         list_del(&device->scsi_device_list_entry);
1505                         list_add_tail(&device->delete_list_entry, &delete_list);
1506                 }
1507         }
1508
1509         /* Process all new devices. */
1510         for (i = 0; i < num_new_devices; i++) {
1511                 device = new_device_list[i];
1512                 if (!device->new_device)
1513                         continue;
1514                 if (device->volume_offline)
1515                         continue;
1516                 list_add_tail(&device->scsi_device_list_entry,
1517                         &ctrl_info->scsi_device_list);
1518                 list_add_tail(&device->add_list_entry, &add_list);
1519                 /* To prevent this device structure from being freed later. */
1520                 device->keep_device = true;
1521         }
1522
1523         pqi_update_all_logical_drive_queue_depths(ctrl_info);
1524
1525         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1526                 scsi_device_list_entry)
1527                 device->offload_enabled =
1528                         device->offload_enabled_pending;
1529
1530         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1531
1532         /* Remove all devices that have gone away. */
1533         list_for_each_entry_safe(device, next, &delete_list,
1534                 delete_list_entry) {
1535                 if (device->sdev)
1536                         pqi_remove_device(ctrl_info, device);
1537                 if (device->volume_offline) {
1538                         pqi_dev_info(ctrl_info, "offline", device);
1539                         pqi_show_volume_status(ctrl_info, device);
1540                 } else {
1541                         pqi_dev_info(ctrl_info, "removed", device);
1542                 }
1543                 list_del(&device->delete_list_entry);
1544                 pqi_free_device(device);
1545         }
1546
1547         /*
1548          * Notify the SCSI ML if the queue depth of any existing device has
1549          * changed.
1550          */
1551         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1552                 scsi_device_list_entry) {
1553                 if (device->sdev && device->queue_depth !=
1554                         device->advertised_queue_depth) {
1555                         device->advertised_queue_depth = device->queue_depth;
1556                         scsi_change_queue_depth(device->sdev,
1557                                 device->advertised_queue_depth);
1558                 }
1559         }
1560
1561         /* Expose any new devices. */
1562         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1563                 if (device->expose_device && !device->sdev) {
1564                         rc = pqi_add_device(ctrl_info, device);
1565                         if (rc) {
1566                                 dev_warn(&ctrl_info->pci_dev->dev,
1567                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1568                                         ctrl_info->scsi_host->host_no,
1569                                         device->bus, device->target,
1570                                         device->lun);
1571                                 pqi_fixup_botched_add(ctrl_info, device);
1572                                 continue;
1573                         }
1574                 }
1575                 pqi_dev_info(ctrl_info, "added", device);
1576         }
1577 }
1578
1579 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1580 {
1581         bool is_supported = false;
1582
1583         switch (device->devtype) {
1584         case TYPE_DISK:
1585         case TYPE_ZBC:
1586         case TYPE_TAPE:
1587         case TYPE_MEDIUM_CHANGER:
1588         case TYPE_ENCLOSURE:
1589                 is_supported = true;
1590                 break;
1591         case TYPE_RAID:
1592                 /*
1593                  * Only support the HBA controller itself as a RAID
1594                  * controller.  If it's a RAID controller other than
1595                  * the HBA itself (an external RAID controller, MSA500
1596                  * or similar), we don't support it.
1597                  */
1598                 if (pqi_is_hba_lunid(device->scsi3addr))
1599                         is_supported = true;
1600                 break;
1601         }
1602
1603         return is_supported;
1604 }
1605
1606 static inline bool pqi_skip_device(u8 *scsi3addr,
1607         struct report_phys_lun_extended_entry *phys_lun_ext_entry)
1608 {
1609         u8 device_flags;
1610
1611         if (!MASKED_DEVICE(scsi3addr))
1612                 return false;
1613
1614         /* The device is masked. */
1615
1616         device_flags = phys_lun_ext_entry->device_flags;
1617
1618         if (device_flags & REPORT_PHYS_LUN_DEV_FLAG_NON_DISK) {
1619                 /*
1620                  * It's a non-disk device.  We ignore all devices of this type
1621                  * when they're masked.
1622                  */
1623                 return true;
1624         }
1625
1626         return false;
1627 }
1628
1629 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
1630 {
1631         /* Expose all devices except for physical devices that are masked. */
1632         if (device->is_physical_device && MASKED_DEVICE(device->scsi3addr))
1633                 return false;
1634
1635         return true;
1636 }
1637
1638 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1639 {
1640         int i;
1641         int rc;
1642         struct list_head new_device_list_head;
1643         struct report_phys_lun_extended *physdev_list = NULL;
1644         struct report_log_lun_extended *logdev_list = NULL;
1645         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1646         struct report_log_lun_extended_entry *log_lun_ext_entry;
1647         struct bmic_identify_physical_device *id_phys = NULL;
1648         u32 num_physicals;
1649         u32 num_logicals;
1650         struct pqi_scsi_dev **new_device_list = NULL;
1651         struct pqi_scsi_dev *device;
1652         struct pqi_scsi_dev *next;
1653         unsigned int num_new_devices;
1654         unsigned int num_valid_devices;
1655         bool is_physical_device;
1656         u8 *scsi3addr;
1657         static char *out_of_memory_msg =
1658                 "out of memory, device discovery stopped";
1659
1660         INIT_LIST_HEAD(&new_device_list_head);
1661
1662         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1663         if (rc)
1664                 goto out;
1665
1666         if (physdev_list)
1667                 num_physicals =
1668                         get_unaligned_be32(&physdev_list->header.list_length)
1669                                 / sizeof(physdev_list->lun_entries[0]);
1670         else
1671                 num_physicals = 0;
1672
1673         if (logdev_list)
1674                 num_logicals =
1675                         get_unaligned_be32(&logdev_list->header.list_length)
1676                                 / sizeof(logdev_list->lun_entries[0]);
1677         else
1678                 num_logicals = 0;
1679
1680         if (num_physicals) {
1681                 /*
1682                  * We need this buffer for calls to pqi_get_physical_disk_info()
1683                  * below.  We allocate it here instead of inside
1684                  * pqi_get_physical_disk_info() because it's a fairly large
1685                  * buffer.
1686                  */
1687                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1688                 if (!id_phys) {
1689                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1690                                 out_of_memory_msg);
1691                         rc = -ENOMEM;
1692                         goto out;
1693                 }
1694         }
1695
1696         num_new_devices = num_physicals + num_logicals;
1697
1698         new_device_list = kmalloc(sizeof(*new_device_list) *
1699                 num_new_devices, GFP_KERNEL);
1700         if (!new_device_list) {
1701                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1702                 rc = -ENOMEM;
1703                 goto out;
1704         }
1705
1706         for (i = 0; i < num_new_devices; i++) {
1707                 device = kzalloc(sizeof(*device), GFP_KERNEL);
1708                 if (!device) {
1709                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1710                                 out_of_memory_msg);
1711                         rc = -ENOMEM;
1712                         goto out;
1713                 }
1714                 list_add_tail(&device->new_device_list_entry,
1715                         &new_device_list_head);
1716         }
1717
1718         device = NULL;
1719         num_valid_devices = 0;
1720
1721         for (i = 0; i < num_new_devices; i++) {
1722
1723                 if (i < num_physicals) {
1724                         is_physical_device = true;
1725                         phys_lun_ext_entry = &physdev_list->lun_entries[i];
1726                         log_lun_ext_entry = NULL;
1727                         scsi3addr = phys_lun_ext_entry->lunid;
1728                 } else {
1729                         is_physical_device = false;
1730                         phys_lun_ext_entry = NULL;
1731                         log_lun_ext_entry =
1732                                 &logdev_list->lun_entries[i - num_physicals];
1733                         scsi3addr = log_lun_ext_entry->lunid;
1734                 }
1735
1736                 if (is_physical_device &&
1737                         pqi_skip_device(scsi3addr, phys_lun_ext_entry))
1738                         continue;
1739
1740                 if (device)
1741                         device = list_next_entry(device, new_device_list_entry);
1742                 else
1743                         device = list_first_entry(&new_device_list_head,
1744                                 struct pqi_scsi_dev, new_device_list_entry);
1745
1746                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1747                 device->is_physical_device = is_physical_device;
1748                 device->raid_level = SA_RAID_UNKNOWN;
1749
1750                 /* Gather information about the device. */
1751                 rc = pqi_get_device_info(ctrl_info, device);
1752                 if (rc == -ENOMEM) {
1753                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1754                                 out_of_memory_msg);
1755                         goto out;
1756                 }
1757                 if (rc) {
1758                         dev_warn(&ctrl_info->pci_dev->dev,
1759                                 "obtaining device info failed, skipping device %016llx\n",
1760                                 get_unaligned_be64(device->scsi3addr));
1761                         rc = 0;
1762                         continue;
1763                 }
1764
1765                 if (!pqi_is_supported_device(device))
1766                         continue;
1767
1768                 pqi_assign_bus_target_lun(device);
1769
1770                 device->expose_device = pqi_expose_device(device);
1771
1772                 if (device->is_physical_device) {
1773                         device->wwid = phys_lun_ext_entry->wwid;
1774                         if ((phys_lun_ext_entry->device_flags &
1775                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1776                                 phys_lun_ext_entry->aio_handle)
1777                                 device->aio_enabled = true;
1778                 } else {
1779                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1780                                 sizeof(device->volume_id));
1781                 }
1782
1783                 switch (device->devtype) {
1784                 case TYPE_DISK:
1785                 case TYPE_ZBC:
1786                 case TYPE_ENCLOSURE:
1787                         if (device->is_physical_device) {
1788                                 device->sas_address =
1789                                         get_unaligned_be64(&device->wwid);
1790                                 if (device->devtype == TYPE_DISK ||
1791                                         device->devtype == TYPE_ZBC) {
1792                                         device->aio_handle =
1793                                                 phys_lun_ext_entry->aio_handle;
1794                                         pqi_get_physical_disk_info(ctrl_info,
1795                                                 device, id_phys);
1796                                 }
1797                         }
1798                         break;
1799                 }
1800
1801                 new_device_list[num_valid_devices++] = device;
1802         }
1803
1804         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1805
1806 out:
1807         list_for_each_entry_safe(device, next, &new_device_list_head,
1808                 new_device_list_entry) {
1809                 if (device->keep_device)
1810                         continue;
1811                 list_del(&device->new_device_list_entry);
1812                 pqi_free_device(device);
1813         }
1814
1815         kfree(new_device_list);
1816         kfree(physdev_list);
1817         kfree(logdev_list);
1818         kfree(id_phys);
1819
1820         return rc;
1821 }
1822
1823 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1824 {
1825         unsigned long flags;
1826         struct pqi_scsi_dev *device;
1827         struct pqi_scsi_dev *next;
1828
1829         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1830
1831         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1832                 scsi_device_list_entry) {
1833                 if (device->sdev)
1834                         pqi_remove_device(ctrl_info, device);
1835                 list_del(&device->scsi_device_list_entry);
1836                 pqi_free_device(device);
1837         }
1838
1839         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1840 }
1841
1842 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1843 {
1844         int rc;
1845
1846         if (pqi_ctrl_offline(ctrl_info))
1847                 return -ENXIO;
1848
1849         mutex_lock(&ctrl_info->scan_mutex);
1850
1851         rc = pqi_update_scsi_devices(ctrl_info);
1852         if (rc)
1853                 pqi_schedule_rescan_worker(ctrl_info);
1854
1855         mutex_unlock(&ctrl_info->scan_mutex);
1856
1857         return rc;
1858 }
1859
1860 static void pqi_scan_start(struct Scsi_Host *shost)
1861 {
1862         pqi_scan_scsi_devices(shost_to_hba(shost));
1863 }
1864
1865 /* Returns TRUE if scan is finished. */
1866
1867 static int pqi_scan_finished(struct Scsi_Host *shost,
1868         unsigned long elapsed_time)
1869 {
1870         struct pqi_ctrl_info *ctrl_info;
1871
1872         ctrl_info = shost_priv(shost);
1873
1874         return !mutex_is_locked(&ctrl_info->scan_mutex);
1875 }
1876
1877 static inline void pqi_set_encryption_info(
1878         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
1879         u64 first_block)
1880 {
1881         u32 volume_blk_size;
1882
1883         /*
1884          * Set the encryption tweak values based on logical block address.
1885          * If the block size is 512, the tweak value is equal to the LBA.
1886          * For other block sizes, tweak value is (LBA * block size) / 512.
1887          */
1888         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
1889         if (volume_blk_size != 512)
1890                 first_block = (first_block * volume_blk_size) / 512;
1891
1892         encryption_info->data_encryption_key_index =
1893                 get_unaligned_le16(&raid_map->data_encryption_key_index);
1894         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
1895         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
1896 }
1897
1898 /*
1899  * Attempt to perform offload RAID mapping for a logical volume I/O.
1900  */
1901
1902 #define PQI_RAID_BYPASS_INELIGIBLE      1
1903
1904 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
1905         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
1906         struct pqi_queue_group *queue_group)
1907 {
1908         struct raid_map *raid_map;
1909         bool is_write = false;
1910         u32 map_index;
1911         u64 first_block;
1912         u64 last_block;
1913         u32 block_cnt;
1914         u32 blocks_per_row;
1915         u64 first_row;
1916         u64 last_row;
1917         u32 first_row_offset;
1918         u32 last_row_offset;
1919         u32 first_column;
1920         u32 last_column;
1921         u64 r0_first_row;
1922         u64 r0_last_row;
1923         u32 r5or6_blocks_per_row;
1924         u64 r5or6_first_row;
1925         u64 r5or6_last_row;
1926         u32 r5or6_first_row_offset;
1927         u32 r5or6_last_row_offset;
1928         u32 r5or6_first_column;
1929         u32 r5or6_last_column;
1930         u16 data_disks_per_row;
1931         u32 total_disks_per_row;
1932         u16 layout_map_count;
1933         u32 stripesize;
1934         u16 strip_size;
1935         u32 first_group;
1936         u32 last_group;
1937         u32 current_group;
1938         u32 map_row;
1939         u32 aio_handle;
1940         u64 disk_block;
1941         u32 disk_block_cnt;
1942         u8 cdb[16];
1943         u8 cdb_length;
1944         int offload_to_mirror;
1945         struct pqi_encryption_info *encryption_info_ptr;
1946         struct pqi_encryption_info encryption_info;
1947 #if BITS_PER_LONG == 32
1948         u64 tmpdiv;
1949 #endif
1950
1951         /* Check for valid opcode, get LBA and block count. */
1952         switch (scmd->cmnd[0]) {
1953         case WRITE_6:
1954                 is_write = true;
1955                 /* fall through */
1956         case READ_6:
1957                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
1958                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
1959                 block_cnt = (u32)scmd->cmnd[4];
1960                 if (block_cnt == 0)
1961                         block_cnt = 256;
1962                 break;
1963         case WRITE_10:
1964                 is_write = true;
1965                 /* fall through */
1966         case READ_10:
1967                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
1968                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
1969                 break;
1970         case WRITE_12:
1971                 is_write = true;
1972                 /* fall through */
1973         case READ_12:
1974                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
1975                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
1976                 break;
1977         case WRITE_16:
1978                 is_write = true;
1979                 /* fall through */
1980         case READ_16:
1981                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
1982                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
1983                 break;
1984         default:
1985                 /* Process via normal I/O path. */
1986                 return PQI_RAID_BYPASS_INELIGIBLE;
1987         }
1988
1989         /* Check for write to non-RAID-0. */
1990         if (is_write && device->raid_level != SA_RAID_0)
1991                 return PQI_RAID_BYPASS_INELIGIBLE;
1992
1993         if (unlikely(block_cnt == 0))
1994                 return PQI_RAID_BYPASS_INELIGIBLE;
1995
1996         last_block = first_block + block_cnt - 1;
1997         raid_map = device->raid_map;
1998
1999         /* Check for invalid block or wraparound. */
2000         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2001                 last_block < first_block)
2002                 return PQI_RAID_BYPASS_INELIGIBLE;
2003
2004         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2005         strip_size = get_unaligned_le16(&raid_map->strip_size);
2006         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2007
2008         /* Calculate stripe information for the request. */
2009         blocks_per_row = data_disks_per_row * strip_size;
2010 #if BITS_PER_LONG == 32
2011         tmpdiv = first_block;
2012         do_div(tmpdiv, blocks_per_row);
2013         first_row = tmpdiv;
2014         tmpdiv = last_block;
2015         do_div(tmpdiv, blocks_per_row);
2016         last_row = tmpdiv;
2017         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2018         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2019         tmpdiv = first_row_offset;
2020         do_div(tmpdiv, strip_size);
2021         first_column = tmpdiv;
2022         tmpdiv = last_row_offset;
2023         do_div(tmpdiv, strip_size);
2024         last_column = tmpdiv;
2025 #else
2026         first_row = first_block / blocks_per_row;
2027         last_row = last_block / blocks_per_row;
2028         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2029         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2030         first_column = first_row_offset / strip_size;
2031         last_column = last_row_offset / strip_size;
2032 #endif
2033
2034         /* If this isn't a single row/column then give to the controller. */
2035         if (first_row != last_row || first_column != last_column)
2036                 return PQI_RAID_BYPASS_INELIGIBLE;
2037
2038         /* Proceeding with driver mapping. */
2039         total_disks_per_row = data_disks_per_row +
2040                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2041         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2042                 get_unaligned_le16(&raid_map->row_cnt);
2043         map_index = (map_row * total_disks_per_row) + first_column;
2044
2045         /* RAID 1 */
2046         if (device->raid_level == SA_RAID_1) {
2047                 if (device->offload_to_mirror)
2048                         map_index += data_disks_per_row;
2049                 device->offload_to_mirror = !device->offload_to_mirror;
2050         } else if (device->raid_level == SA_RAID_ADM) {
2051                 /* RAID ADM */
2052                 /*
2053                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2054                  * divisible by 3.
2055                  */
2056                 offload_to_mirror = device->offload_to_mirror;
2057                 if (offload_to_mirror == 0)  {
2058                         /* use physical disk in the first mirrored group. */
2059                         map_index %= data_disks_per_row;
2060                 } else {
2061                         do {
2062                                 /*
2063                                  * Determine mirror group that map_index
2064                                  * indicates.
2065                                  */
2066                                 current_group = map_index / data_disks_per_row;
2067
2068                                 if (offload_to_mirror != current_group) {
2069                                         if (current_group <
2070                                                 layout_map_count - 1) {
2071                                                 /*
2072                                                  * Select raid index from
2073                                                  * next group.
2074                                                  */
2075                                                 map_index += data_disks_per_row;
2076                                                 current_group++;
2077                                         } else {
2078                                                 /*
2079                                                  * Select raid index from first
2080                                                  * group.
2081                                                  */
2082                                                 map_index %= data_disks_per_row;
2083                                                 current_group = 0;
2084                                         }
2085                                 }
2086                         } while (offload_to_mirror != current_group);
2087                 }
2088
2089                 /* Set mirror group to use next time. */
2090                 offload_to_mirror =
2091                         (offload_to_mirror >= layout_map_count - 1) ?
2092                                 0 : offload_to_mirror + 1;
2093                 WARN_ON(offload_to_mirror >= layout_map_count);
2094                 device->offload_to_mirror = offload_to_mirror;
2095                 /*
2096                  * Avoid direct use of device->offload_to_mirror within this
2097                  * function since multiple threads might simultaneously
2098                  * increment it beyond the range of device->layout_map_count -1.
2099                  */
2100         } else if ((device->raid_level == SA_RAID_5 ||
2101                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2102                 /* RAID 50/60 */
2103                 /* Verify first and last block are in same RAID group */
2104                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2105                 stripesize = r5or6_blocks_per_row * layout_map_count;
2106 #if BITS_PER_LONG == 32
2107                 tmpdiv = first_block;
2108                 first_group = do_div(tmpdiv, stripesize);
2109                 tmpdiv = first_group;
2110                 do_div(tmpdiv, r5or6_blocks_per_row);
2111                 first_group = tmpdiv;
2112                 tmpdiv = last_block;
2113                 last_group = do_div(tmpdiv, stripesize);
2114                 tmpdiv = last_group;
2115                 do_div(tmpdiv, r5or6_blocks_per_row);
2116                 last_group = tmpdiv;
2117 #else
2118                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2119                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2120 #endif
2121                 if (first_group != last_group)
2122                         return PQI_RAID_BYPASS_INELIGIBLE;
2123
2124                 /* Verify request is in a single row of RAID 5/6 */
2125 #if BITS_PER_LONG == 32
2126                 tmpdiv = first_block;
2127                 do_div(tmpdiv, stripesize);
2128                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2129                 tmpdiv = last_block;
2130                 do_div(tmpdiv, stripesize);
2131                 r5or6_last_row = r0_last_row = tmpdiv;
2132 #else
2133                 first_row = r5or6_first_row = r0_first_row =
2134                         first_block / stripesize;
2135                 r5or6_last_row = r0_last_row = last_block / stripesize;
2136 #endif
2137                 if (r5or6_first_row != r5or6_last_row)
2138                         return PQI_RAID_BYPASS_INELIGIBLE;
2139
2140                 /* Verify request is in a single column */
2141 #if BITS_PER_LONG == 32
2142                 tmpdiv = first_block;
2143                 first_row_offset = do_div(tmpdiv, stripesize);
2144                 tmpdiv = first_row_offset;
2145                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2146                 r5or6_first_row_offset = first_row_offset;
2147                 tmpdiv = last_block;
2148                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2149                 tmpdiv = r5or6_last_row_offset;
2150                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2151                 tmpdiv = r5or6_first_row_offset;
2152                 do_div(tmpdiv, strip_size);
2153                 first_column = r5or6_first_column = tmpdiv;
2154                 tmpdiv = r5or6_last_row_offset;
2155                 do_div(tmpdiv, strip_size);
2156                 r5or6_last_column = tmpdiv;
2157 #else
2158                 first_row_offset = r5or6_first_row_offset =
2159                         (u32)((first_block % stripesize) %
2160                         r5or6_blocks_per_row);
2161
2162                 r5or6_last_row_offset =
2163                         (u32)((last_block % stripesize) %
2164                         r5or6_blocks_per_row);
2165
2166                 first_column = r5or6_first_row_offset / strip_size;
2167                 r5or6_first_column = first_column;
2168                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2169 #endif
2170                 if (r5or6_first_column != r5or6_last_column)
2171                         return PQI_RAID_BYPASS_INELIGIBLE;
2172
2173                 /* Request is eligible */
2174                 map_row =
2175                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2176                         get_unaligned_le16(&raid_map->row_cnt);
2177
2178                 map_index = (first_group *
2179                         (get_unaligned_le16(&raid_map->row_cnt) *
2180                         total_disks_per_row)) +
2181                         (map_row * total_disks_per_row) + first_column;
2182         }
2183
2184         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2185                 return PQI_RAID_BYPASS_INELIGIBLE;
2186
2187         aio_handle = raid_map->disk_data[map_index].aio_handle;
2188         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2189                 first_row * strip_size +
2190                 (first_row_offset - first_column * strip_size);
2191         disk_block_cnt = block_cnt;
2192
2193         /* Handle differing logical/physical block sizes. */
2194         if (raid_map->phys_blk_shift) {
2195                 disk_block <<= raid_map->phys_blk_shift;
2196                 disk_block_cnt <<= raid_map->phys_blk_shift;
2197         }
2198
2199         if (unlikely(disk_block_cnt > 0xffff))
2200                 return PQI_RAID_BYPASS_INELIGIBLE;
2201
2202         /* Build the new CDB for the physical disk I/O. */
2203         if (disk_block > 0xffffffff) {
2204                 cdb[0] = is_write ? WRITE_16 : READ_16;
2205                 cdb[1] = 0;
2206                 put_unaligned_be64(disk_block, &cdb[2]);
2207                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2208                 cdb[14] = 0;
2209                 cdb[15] = 0;
2210                 cdb_length = 16;
2211         } else {
2212                 cdb[0] = is_write ? WRITE_10 : READ_10;
2213                 cdb[1] = 0;
2214                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2215                 cdb[6] = 0;
2216                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2217                 cdb[9] = 0;
2218                 cdb_length = 10;
2219         }
2220
2221         if (get_unaligned_le16(&raid_map->flags) &
2222                 RAID_MAP_ENCRYPTION_ENABLED) {
2223                 pqi_set_encryption_info(&encryption_info, raid_map,
2224                         first_block);
2225                 encryption_info_ptr = &encryption_info;
2226         } else {
2227                 encryption_info_ptr = NULL;
2228         }
2229
2230         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2231                 cdb, cdb_length, queue_group, encryption_info_ptr);
2232 }
2233
2234 #define PQI_STATUS_IDLE         0x0
2235
2236 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2237 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2238
2239 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2240 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2241 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2242 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2243 #define PQI_DEVICE_STATE_ERROR                          0x4
2244
2245 #define PQI_MODE_READY_TIMEOUT_SECS             30
2246 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2247
2248 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2249 {
2250         struct pqi_device_registers __iomem *pqi_registers;
2251         unsigned long timeout;
2252         u64 signature;
2253         u8 status;
2254
2255         pqi_registers = ctrl_info->pqi_registers;
2256         timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2257
2258         while (1) {
2259                 signature = readq(&pqi_registers->signature);
2260                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2261                         sizeof(signature)) == 0)
2262                         break;
2263                 if (time_after(jiffies, timeout)) {
2264                         dev_err(&ctrl_info->pci_dev->dev,
2265                                 "timed out waiting for PQI signature\n");
2266                         return -ETIMEDOUT;
2267                 }
2268                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2269         }
2270
2271         while (1) {
2272                 status = readb(&pqi_registers->function_and_status_code);
2273                 if (status == PQI_STATUS_IDLE)
2274                         break;
2275                 if (time_after(jiffies, timeout)) {
2276                         dev_err(&ctrl_info->pci_dev->dev,
2277                                 "timed out waiting for PQI IDLE\n");
2278                         return -ETIMEDOUT;
2279                 }
2280                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2281         }
2282
2283         while (1) {
2284                 if (readl(&pqi_registers->device_status) ==
2285                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2286                         break;
2287                 if (time_after(jiffies, timeout)) {
2288                         dev_err(&ctrl_info->pci_dev->dev,
2289                                 "timed out waiting for PQI all registers ready\n");
2290                         return -ETIMEDOUT;
2291                 }
2292                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2293         }
2294
2295         return 0;
2296 }
2297
2298 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2299 {
2300         struct pqi_scsi_dev *device;
2301
2302         device = io_request->scmd->device->hostdata;
2303         device->offload_enabled = false;
2304 }
2305
2306 static inline void pqi_take_device_offline(struct scsi_device *sdev)
2307 {
2308         struct pqi_ctrl_info *ctrl_info;
2309         struct pqi_scsi_dev *device;
2310
2311         if (scsi_device_online(sdev)) {
2312                 scsi_device_set_state(sdev, SDEV_OFFLINE);
2313                 ctrl_info = shost_to_hba(sdev->host);
2314                 schedule_delayed_work(&ctrl_info->rescan_work, 0);
2315                 device = sdev->hostdata;
2316                 dev_err(&ctrl_info->pci_dev->dev, "offlined scsi %d:%d:%d:%d\n",
2317                         ctrl_info->scsi_host->host_no, device->bus,
2318                         device->target, device->lun);
2319         }
2320 }
2321
2322 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2323 {
2324         u8 scsi_status;
2325         u8 host_byte;
2326         struct scsi_cmnd *scmd;
2327         struct pqi_raid_error_info *error_info;
2328         size_t sense_data_length;
2329         int residual_count;
2330         int xfer_count;
2331         struct scsi_sense_hdr sshdr;
2332
2333         scmd = io_request->scmd;
2334         if (!scmd)
2335                 return;
2336
2337         error_info = io_request->error_info;
2338         scsi_status = error_info->status;
2339         host_byte = DID_OK;
2340
2341         if (error_info->data_out_result == PQI_DATA_IN_OUT_UNDERFLOW) {
2342                 xfer_count =
2343                         get_unaligned_le32(&error_info->data_out_transferred);
2344                 residual_count = scsi_bufflen(scmd) - xfer_count;
2345                 scsi_set_resid(scmd, residual_count);
2346                 if (xfer_count < scmd->underflow)
2347                         host_byte = DID_SOFT_ERROR;
2348         }
2349
2350         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2351         if (sense_data_length == 0)
2352                 sense_data_length =
2353                         get_unaligned_le16(&error_info->response_data_length);
2354         if (sense_data_length) {
2355                 if (sense_data_length > sizeof(error_info->data))
2356                         sense_data_length = sizeof(error_info->data);
2357
2358                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2359                         scsi_normalize_sense(error_info->data,
2360                                 sense_data_length, &sshdr) &&
2361                                 sshdr.sense_key == HARDWARE_ERROR &&
2362                                 sshdr.asc == 0x3e &&
2363                                 sshdr.ascq == 0x1) {
2364                         pqi_take_device_offline(scmd->device);
2365                         host_byte = DID_NO_CONNECT;
2366                 }
2367
2368                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2369                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2370                 memcpy(scmd->sense_buffer, error_info->data,
2371                         sense_data_length);
2372         }
2373
2374         scmd->result = scsi_status;
2375         set_host_byte(scmd, host_byte);
2376 }
2377
2378 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2379 {
2380         u8 scsi_status;
2381         u8 host_byte;
2382         struct scsi_cmnd *scmd;
2383         struct pqi_aio_error_info *error_info;
2384         size_t sense_data_length;
2385         int residual_count;
2386         int xfer_count;
2387         bool device_offline;
2388
2389         scmd = io_request->scmd;
2390         error_info = io_request->error_info;
2391         host_byte = DID_OK;
2392         sense_data_length = 0;
2393         device_offline = false;
2394
2395         switch (error_info->service_response) {
2396         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2397                 scsi_status = error_info->status;
2398                 break;
2399         case PQI_AIO_SERV_RESPONSE_FAILURE:
2400                 switch (error_info->status) {
2401                 case PQI_AIO_STATUS_IO_ABORTED:
2402                         scsi_status = SAM_STAT_TASK_ABORTED;
2403                         break;
2404                 case PQI_AIO_STATUS_UNDERRUN:
2405                         scsi_status = SAM_STAT_GOOD;
2406                         residual_count = get_unaligned_le32(
2407                                                 &error_info->residual_count);
2408                         scsi_set_resid(scmd, residual_count);
2409                         xfer_count = scsi_bufflen(scmd) - residual_count;
2410                         if (xfer_count < scmd->underflow)
2411                                 host_byte = DID_SOFT_ERROR;
2412                         break;
2413                 case PQI_AIO_STATUS_OVERRUN:
2414                         scsi_status = SAM_STAT_GOOD;
2415                         break;
2416                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2417                         pqi_aio_path_disabled(io_request);
2418                         scsi_status = SAM_STAT_GOOD;
2419                         io_request->status = -EAGAIN;
2420                         break;
2421                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2422                 case PQI_AIO_STATUS_INVALID_DEVICE:
2423                         device_offline = true;
2424                         pqi_take_device_offline(scmd->device);
2425                         host_byte = DID_NO_CONNECT;
2426                         scsi_status = SAM_STAT_CHECK_CONDITION;
2427                         break;
2428                 case PQI_AIO_STATUS_IO_ERROR:
2429                 default:
2430                         scsi_status = SAM_STAT_CHECK_CONDITION;
2431                         break;
2432                 }
2433                 break;
2434         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2435         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2436                 scsi_status = SAM_STAT_GOOD;
2437                 break;
2438         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2439         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2440         default:
2441                 scsi_status = SAM_STAT_CHECK_CONDITION;
2442                 break;
2443         }
2444
2445         if (error_info->data_present) {
2446                 sense_data_length =
2447                         get_unaligned_le16(&error_info->data_length);
2448                 if (sense_data_length) {
2449                         if (sense_data_length > sizeof(error_info->data))
2450                                 sense_data_length = sizeof(error_info->data);
2451                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2452                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2453                         memcpy(scmd->sense_buffer, error_info->data,
2454                                 sense_data_length);
2455                 }
2456         }
2457
2458         if (device_offline && sense_data_length == 0)
2459                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2460                         0x3e, 0x1);
2461
2462         scmd->result = scsi_status;
2463         set_host_byte(scmd, host_byte);
2464 }
2465
2466 static void pqi_process_io_error(unsigned int iu_type,
2467         struct pqi_io_request *io_request)
2468 {
2469         switch (iu_type) {
2470         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2471                 pqi_process_raid_io_error(io_request);
2472                 break;
2473         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2474                 pqi_process_aio_io_error(io_request);
2475                 break;
2476         }
2477 }
2478
2479 static int pqi_interpret_task_management_response(
2480         struct pqi_task_management_response *response)
2481 {
2482         int rc;
2483
2484         switch (response->response_code) {
2485         case SOP_TMF_COMPLETE:
2486         case SOP_TMF_FUNCTION_SUCCEEDED:
2487                 rc = 0;
2488                 break;
2489         default:
2490                 rc = -EIO;
2491                 break;
2492         }
2493
2494         return rc;
2495 }
2496
2497 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2498         struct pqi_queue_group *queue_group)
2499 {
2500         unsigned int num_responses;
2501         pqi_index_t oq_pi;
2502         pqi_index_t oq_ci;
2503         struct pqi_io_request *io_request;
2504         struct pqi_io_response *response;
2505         u16 request_id;
2506
2507         num_responses = 0;
2508         oq_ci = queue_group->oq_ci_copy;
2509
2510         while (1) {
2511                 oq_pi = *queue_group->oq_pi;
2512                 if (oq_pi == oq_ci)
2513                         break;
2514
2515                 num_responses++;
2516                 response = queue_group->oq_element_array +
2517                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2518
2519                 request_id = get_unaligned_le16(&response->request_id);
2520                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2521
2522                 io_request = &ctrl_info->io_request_pool[request_id];
2523                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2524
2525                 switch (response->header.iu_type) {
2526                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2527                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2528                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2529                         break;
2530                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2531                         io_request->status =
2532                                 pqi_interpret_task_management_response(
2533                                         (void *)response);
2534                         break;
2535                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2536                         pqi_aio_path_disabled(io_request);
2537                         io_request->status = -EAGAIN;
2538                         break;
2539                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2540                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2541                         io_request->error_info = ctrl_info->error_buffer +
2542                                 (get_unaligned_le16(&response->error_index) *
2543                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2544                         pqi_process_io_error(response->header.iu_type,
2545                                 io_request);
2546                         break;
2547                 default:
2548                         dev_err(&ctrl_info->pci_dev->dev,
2549                                 "unexpected IU type: 0x%x\n",
2550                                 response->header.iu_type);
2551                         WARN_ON(response->header.iu_type);
2552                         break;
2553                 }
2554
2555                 io_request->io_complete_callback(io_request,
2556                         io_request->context);
2557
2558                 /*
2559                  * Note that the I/O request structure CANNOT BE TOUCHED after
2560                  * returning from the I/O completion callback!
2561                  */
2562
2563                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2564         }
2565
2566         if (num_responses) {
2567                 queue_group->oq_ci_copy = oq_ci;
2568                 writel(oq_ci, queue_group->oq_ci);
2569         }
2570
2571         return num_responses;
2572 }
2573
2574 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2575         unsigned int ci, unsigned int elements_in_queue)
2576 {
2577         unsigned int num_elements_used;
2578
2579         if (pi >= ci)
2580                 num_elements_used = pi - ci;
2581         else
2582                 num_elements_used = elements_in_queue - ci + pi;
2583
2584         return elements_in_queue - num_elements_used - 1;
2585 }
2586
2587 #define PQI_EVENT_ACK_TIMEOUT   30
2588
2589 static void pqi_start_event_ack(struct pqi_ctrl_info *ctrl_info,
2590         struct pqi_event_acknowledge_request *iu, size_t iu_length)
2591 {
2592         pqi_index_t iq_pi;
2593         pqi_index_t iq_ci;
2594         unsigned long flags;
2595         void *next_element;
2596         unsigned long timeout;
2597         struct pqi_queue_group *queue_group;
2598
2599         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2600         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2601
2602         timeout = (PQI_EVENT_ACK_TIMEOUT * HZ) + jiffies;
2603
2604         while (1) {
2605                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2606
2607                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2608                 iq_ci = *queue_group->iq_ci[RAID_PATH];
2609
2610                 if (pqi_num_elements_free(iq_pi, iq_ci,
2611                         ctrl_info->num_elements_per_iq))
2612                         break;
2613
2614                 spin_unlock_irqrestore(
2615                         &queue_group->submit_lock[RAID_PATH], flags);
2616
2617                 if (time_after(jiffies, timeout)) {
2618                         dev_err(&ctrl_info->pci_dev->dev,
2619                                 "sending event acknowledge timed out\n");
2620                         return;
2621                 }
2622         }
2623
2624         next_element = queue_group->iq_element_array[RAID_PATH] +
2625                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2626
2627         memcpy(next_element, iu, iu_length);
2628
2629         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2630
2631         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2632
2633         /*
2634          * This write notifies the controller that an IU is available to be
2635          * processed.
2636          */
2637         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2638
2639         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2640 }
2641
2642 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2643         struct pqi_event *event)
2644 {
2645         struct pqi_event_acknowledge_request request;
2646
2647         memset(&request, 0, sizeof(request));
2648
2649         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2650         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2651                 &request.header.iu_length);
2652         request.event_type = event->event_type;
2653         request.event_id = event->event_id;
2654         request.additional_event_id = event->additional_event_id;
2655
2656         pqi_start_event_ack(ctrl_info, &request, sizeof(request));
2657 }
2658
2659 static void pqi_event_worker(struct work_struct *work)
2660 {
2661         unsigned int i;
2662         struct pqi_ctrl_info *ctrl_info;
2663         struct pqi_event *pending_event;
2664         bool got_non_heartbeat_event = false;
2665
2666         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2667
2668         pending_event = ctrl_info->pending_events;
2669         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2670                 if (pending_event->pending) {
2671                         pending_event->pending = false;
2672                         pqi_acknowledge_event(ctrl_info, pending_event);
2673                         if (i != PQI_EVENT_HEARTBEAT)
2674                                 got_non_heartbeat_event = true;
2675                 }
2676                 pending_event++;
2677         }
2678
2679         if (got_non_heartbeat_event)
2680                 pqi_schedule_rescan_worker(ctrl_info);
2681 }
2682
2683 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
2684 {
2685         unsigned int i;
2686         unsigned int path;
2687         struct pqi_queue_group *queue_group;
2688         unsigned long flags;
2689         struct pqi_io_request *io_request;
2690         struct pqi_io_request *next;
2691         struct scsi_cmnd *scmd;
2692
2693         ctrl_info->controller_online = false;
2694         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
2695
2696         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
2697                 queue_group = &ctrl_info->queue_groups[i];
2698
2699                 for (path = 0; path < 2; path++) {
2700                         spin_lock_irqsave(
2701                                 &queue_group->submit_lock[path], flags);
2702
2703                         list_for_each_entry_safe(io_request, next,
2704                                 &queue_group->request_list[path],
2705                                 request_list_entry) {
2706
2707                                 scmd = io_request->scmd;
2708                                 if (scmd) {
2709                                         set_host_byte(scmd, DID_NO_CONNECT);
2710                                         pqi_scsi_done(scmd);
2711                                 }
2712
2713                                 list_del(&io_request->request_list_entry);
2714                         }
2715
2716                         spin_unlock_irqrestore(
2717                                 &queue_group->submit_lock[path], flags);
2718                 }
2719         }
2720 }
2721
2722 #define PQI_HEARTBEAT_TIMER_INTERVAL    (5 * HZ)
2723 #define PQI_MAX_HEARTBEAT_REQUESTS      5
2724
2725 static void pqi_heartbeat_timer_handler(unsigned long data)
2726 {
2727         int num_interrupts;
2728         struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
2729
2730         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2731
2732         if (num_interrupts == ctrl_info->previous_num_interrupts) {
2733                 ctrl_info->num_heartbeats_requested++;
2734                 if (ctrl_info->num_heartbeats_requested >
2735                         PQI_MAX_HEARTBEAT_REQUESTS) {
2736                         pqi_take_ctrl_offline(ctrl_info);
2737                         return;
2738                 }
2739                 ctrl_info->pending_events[PQI_EVENT_HEARTBEAT].pending = true;
2740                 schedule_work(&ctrl_info->event_work);
2741         } else {
2742                 ctrl_info->num_heartbeats_requested = 0;
2743         }
2744
2745         ctrl_info->previous_num_interrupts = num_interrupts;
2746         mod_timer(&ctrl_info->heartbeat_timer,
2747                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2748 }
2749
2750 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2751 {
2752         ctrl_info->previous_num_interrupts =
2753                 atomic_read(&ctrl_info->num_interrupts);
2754
2755         init_timer(&ctrl_info->heartbeat_timer);
2756         ctrl_info->heartbeat_timer.expires =
2757                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2758         ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
2759         ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
2760         add_timer(&ctrl_info->heartbeat_timer);
2761         ctrl_info->heartbeat_timer_started = true;
2762 }
2763
2764 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2765 {
2766         if (ctrl_info->heartbeat_timer_started)
2767                 del_timer_sync(&ctrl_info->heartbeat_timer);
2768 }
2769
2770 static int pqi_event_type_to_event_index(unsigned int event_type)
2771 {
2772         int index;
2773
2774         switch (event_type) {
2775         case PQI_EVENT_TYPE_HEARTBEAT:
2776                 index = PQI_EVENT_HEARTBEAT;
2777                 break;
2778         case PQI_EVENT_TYPE_HOTPLUG:
2779                 index = PQI_EVENT_HOTPLUG;
2780                 break;
2781         case PQI_EVENT_TYPE_HARDWARE:
2782                 index = PQI_EVENT_HARDWARE;
2783                 break;
2784         case PQI_EVENT_TYPE_PHYSICAL_DEVICE:
2785                 index = PQI_EVENT_PHYSICAL_DEVICE;
2786                 break;
2787         case PQI_EVENT_TYPE_LOGICAL_DEVICE:
2788                 index = PQI_EVENT_LOGICAL_DEVICE;
2789                 break;
2790         case PQI_EVENT_TYPE_AIO_STATE_CHANGE:
2791                 index = PQI_EVENT_AIO_STATE_CHANGE;
2792                 break;
2793         case PQI_EVENT_TYPE_AIO_CONFIG_CHANGE:
2794                 index = PQI_EVENT_AIO_CONFIG_CHANGE;
2795                 break;
2796         default:
2797                 index = -1;
2798                 break;
2799         }
2800
2801         return index;
2802 }
2803
2804 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
2805 {
2806         unsigned int num_events;
2807         pqi_index_t oq_pi;
2808         pqi_index_t oq_ci;
2809         struct pqi_event_queue *event_queue;
2810         struct pqi_event_response *response;
2811         struct pqi_event *pending_event;
2812         bool need_delayed_work;
2813         int event_index;
2814
2815         event_queue = &ctrl_info->event_queue;
2816         num_events = 0;
2817         need_delayed_work = false;
2818         oq_ci = event_queue->oq_ci_copy;
2819
2820         while (1) {
2821                 oq_pi = *event_queue->oq_pi;
2822                 if (oq_pi == oq_ci)
2823                         break;
2824
2825                 num_events++;
2826                 response = event_queue->oq_element_array +
2827                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
2828
2829                 event_index =
2830                         pqi_event_type_to_event_index(response->event_type);
2831
2832                 if (event_index >= 0) {
2833                         if (response->request_acknowlege) {
2834                                 pending_event =
2835                                         &ctrl_info->pending_events[event_index];
2836                                 pending_event->event_type =
2837                                         response->event_type;
2838                                 pending_event->event_id = response->event_id;
2839                                 pending_event->additional_event_id =
2840                                         response->additional_event_id;
2841                                 if (event_index != PQI_EVENT_HEARTBEAT) {
2842                                         pending_event->pending = true;
2843                                         need_delayed_work = true;
2844                                 }
2845                         }
2846                 }
2847
2848                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
2849         }
2850
2851         if (num_events) {
2852                 event_queue->oq_ci_copy = oq_ci;
2853                 writel(oq_ci, event_queue->oq_ci);
2854
2855                 if (need_delayed_work)
2856                         schedule_work(&ctrl_info->event_work);
2857         }
2858
2859         return num_events;
2860 }
2861
2862 static irqreturn_t pqi_irq_handler(int irq, void *data)
2863 {
2864         struct pqi_ctrl_info *ctrl_info;
2865         struct pqi_queue_group *queue_group;
2866         unsigned int num_responses_handled;
2867
2868         queue_group = data;
2869         ctrl_info = queue_group->ctrl_info;
2870
2871         if (!ctrl_info || !queue_group->oq_ci)
2872                 return IRQ_NONE;
2873
2874         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
2875
2876         if (irq == ctrl_info->event_irq)
2877                 num_responses_handled += pqi_process_event_intr(ctrl_info);
2878
2879         if (num_responses_handled)
2880                 atomic_inc(&ctrl_info->num_interrupts);
2881
2882         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
2883         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
2884
2885         return IRQ_HANDLED;
2886 }
2887
2888 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
2889 {
2890         int i;
2891         int rc;
2892
2893         ctrl_info->event_irq = ctrl_info->msix_vectors[0];
2894
2895         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
2896                 rc = request_irq(ctrl_info->msix_vectors[i],
2897                         pqi_irq_handler, 0,
2898                         DRIVER_NAME_SHORT, ctrl_info->intr_data[i]);
2899                 if (rc) {
2900                         dev_err(&ctrl_info->pci_dev->dev,
2901                                 "irq %u init failed with error %d\n",
2902                                 ctrl_info->msix_vectors[i], rc);
2903                         return rc;
2904                 }
2905                 ctrl_info->num_msix_vectors_initialized++;
2906         }
2907
2908         return 0;
2909 }
2910
2911 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
2912 {
2913         int i;
2914
2915         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
2916                 free_irq(ctrl_info->msix_vectors[i],
2917                         ctrl_info->intr_data[i]);
2918 }
2919
2920 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
2921 {
2922         unsigned int i;
2923         int max_vectors;
2924         int num_vectors_enabled;
2925         struct msix_entry msix_entries[PQI_MAX_MSIX_VECTORS];
2926
2927         max_vectors = ctrl_info->num_queue_groups;
2928
2929         for (i = 0; i < max_vectors; i++)
2930                 msix_entries[i].entry = i;
2931
2932         num_vectors_enabled = pci_enable_msix_range(ctrl_info->pci_dev,
2933                 msix_entries, PQI_MIN_MSIX_VECTORS, max_vectors);
2934
2935         if (num_vectors_enabled < 0) {
2936                 dev_err(&ctrl_info->pci_dev->dev,
2937                         "MSI-X init failed with error %d\n",
2938                         num_vectors_enabled);
2939                 return num_vectors_enabled;
2940         }
2941
2942         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
2943         for (i = 0; i < num_vectors_enabled; i++) {
2944                 ctrl_info->msix_vectors[i] = msix_entries[i].vector;
2945                 ctrl_info->intr_data[i] = &ctrl_info->queue_groups[i];
2946         }
2947
2948         return 0;
2949 }
2950
2951 static void pqi_irq_set_affinity_hint(struct pqi_ctrl_info *ctrl_info)
2952 {
2953         int i;
2954         int rc;
2955         int cpu;
2956
2957         cpu = cpumask_first(cpu_online_mask);
2958         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) {
2959                 rc = irq_set_affinity_hint(ctrl_info->msix_vectors[i],
2960                         get_cpu_mask(cpu));
2961                 if (rc)
2962                         dev_err(&ctrl_info->pci_dev->dev,
2963                                 "error %d setting affinity hint for irq vector %u\n",
2964                                 rc, ctrl_info->msix_vectors[i]);
2965                 cpu = cpumask_next(cpu, cpu_online_mask);
2966         }
2967 }
2968
2969 static void pqi_irq_unset_affinity_hint(struct pqi_ctrl_info *ctrl_info)
2970 {
2971         int i;
2972
2973         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
2974                 irq_set_affinity_hint(ctrl_info->msix_vectors[i], NULL);
2975 }
2976
2977 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
2978 {
2979         unsigned int i;
2980         size_t alloc_length;
2981         size_t element_array_length_per_iq;
2982         size_t element_array_length_per_oq;
2983         void *element_array;
2984         void *next_queue_index;
2985         void *aligned_pointer;
2986         unsigned int num_inbound_queues;
2987         unsigned int num_outbound_queues;
2988         unsigned int num_queue_indexes;
2989         struct pqi_queue_group *queue_group;
2990
2991         element_array_length_per_iq =
2992                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
2993                 ctrl_info->num_elements_per_iq;
2994         element_array_length_per_oq =
2995                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
2996                 ctrl_info->num_elements_per_oq;
2997         num_inbound_queues = ctrl_info->num_queue_groups * 2;
2998         num_outbound_queues = ctrl_info->num_queue_groups;
2999         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3000
3001         aligned_pointer = NULL;
3002
3003         for (i = 0; i < num_inbound_queues; i++) {
3004                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3005                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3006                 aligned_pointer += element_array_length_per_iq;
3007         }
3008
3009         for (i = 0; i < num_outbound_queues; i++) {
3010                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3011                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3012                 aligned_pointer += element_array_length_per_oq;
3013         }
3014
3015         aligned_pointer = PTR_ALIGN(aligned_pointer,
3016                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3017         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3018                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3019
3020         for (i = 0; i < num_queue_indexes; i++) {
3021                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3022                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3023                 aligned_pointer += sizeof(pqi_index_t);
3024         }
3025
3026         alloc_length = (size_t)aligned_pointer +
3027                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3028
3029         ctrl_info->queue_memory_base =
3030                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3031                         alloc_length,
3032                         &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3033
3034         if (!ctrl_info->queue_memory_base) {
3035                 dev_err(&ctrl_info->pci_dev->dev,
3036                         "failed to allocate memory for PQI admin queues\n");
3037                 return -ENOMEM;
3038         }
3039
3040         ctrl_info->queue_memory_length = alloc_length;
3041
3042         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3043                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3044
3045         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3046                 queue_group = &ctrl_info->queue_groups[i];
3047                 queue_group->iq_element_array[RAID_PATH] = element_array;
3048                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3049                         ctrl_info->queue_memory_base_dma_handle +
3050                                 (element_array - ctrl_info->queue_memory_base);
3051                 element_array += element_array_length_per_iq;
3052                 element_array = PTR_ALIGN(element_array,
3053                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3054                 queue_group->iq_element_array[AIO_PATH] = element_array;
3055                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3056                         ctrl_info->queue_memory_base_dma_handle +
3057                         (element_array - ctrl_info->queue_memory_base);
3058                 element_array += element_array_length_per_iq;
3059                 element_array = PTR_ALIGN(element_array,
3060                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3061         }
3062
3063         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3064                 queue_group = &ctrl_info->queue_groups[i];
3065                 queue_group->oq_element_array = element_array;
3066                 queue_group->oq_element_array_bus_addr =
3067                         ctrl_info->queue_memory_base_dma_handle +
3068                         (element_array - ctrl_info->queue_memory_base);
3069                 element_array += element_array_length_per_oq;
3070                 element_array = PTR_ALIGN(element_array,
3071                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3072         }
3073
3074         ctrl_info->event_queue.oq_element_array = element_array;
3075         ctrl_info->event_queue.oq_element_array_bus_addr =
3076                 ctrl_info->queue_memory_base_dma_handle +
3077                 (element_array - ctrl_info->queue_memory_base);
3078         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3079                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3080
3081         next_queue_index = PTR_ALIGN(element_array,
3082                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3083
3084         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3085                 queue_group = &ctrl_info->queue_groups[i];
3086                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3087                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3088                         ctrl_info->queue_memory_base_dma_handle +
3089                         (next_queue_index - ctrl_info->queue_memory_base);
3090                 next_queue_index += sizeof(pqi_index_t);
3091                 next_queue_index = PTR_ALIGN(next_queue_index,
3092                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3093                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3094                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3095                         ctrl_info->queue_memory_base_dma_handle +
3096                         (next_queue_index - ctrl_info->queue_memory_base);
3097                 next_queue_index += sizeof(pqi_index_t);
3098                 next_queue_index = PTR_ALIGN(next_queue_index,
3099                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3100                 queue_group->oq_pi = next_queue_index;
3101                 queue_group->oq_pi_bus_addr =
3102                         ctrl_info->queue_memory_base_dma_handle +
3103                         (next_queue_index - ctrl_info->queue_memory_base);
3104                 next_queue_index += sizeof(pqi_index_t);
3105                 next_queue_index = PTR_ALIGN(next_queue_index,
3106                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3107         }
3108
3109         ctrl_info->event_queue.oq_pi = next_queue_index;
3110         ctrl_info->event_queue.oq_pi_bus_addr =
3111                 ctrl_info->queue_memory_base_dma_handle +
3112                 (next_queue_index - ctrl_info->queue_memory_base);
3113
3114         return 0;
3115 }
3116
3117 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3118 {
3119         unsigned int i;
3120         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3121         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3122
3123         /*
3124          * Initialize the backpointers to the controller structure in
3125          * each operational queue group structure.
3126          */
3127         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3128                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3129
3130         /*
3131          * Assign IDs to all operational queues.  Note that the IDs
3132          * assigned to operational IQs are independent of the IDs
3133          * assigned to operational OQs.
3134          */
3135         ctrl_info->event_queue.oq_id = next_oq_id++;
3136         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3137                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3138                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3139                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3140         }
3141
3142         /*
3143          * Assign MSI-X table entry indexes to all queues.  Note that the
3144          * interrupt for the event queue is shared with the first queue group.
3145          */
3146         ctrl_info->event_queue.int_msg_num = 0;
3147         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3148                 ctrl_info->queue_groups[i].int_msg_num = i;
3149
3150         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3151                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3152                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3153                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3154                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3155         }
3156 }
3157
3158 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3159 {
3160         size_t alloc_length;
3161         struct pqi_admin_queues_aligned *admin_queues_aligned;
3162         struct pqi_admin_queues *admin_queues;
3163
3164         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3165                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3166
3167         ctrl_info->admin_queue_memory_base =
3168                 dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3169                         alloc_length,
3170                         &ctrl_info->admin_queue_memory_base_dma_handle,
3171                         GFP_KERNEL);
3172
3173         if (!ctrl_info->admin_queue_memory_base)
3174                 return -ENOMEM;
3175
3176         ctrl_info->admin_queue_memory_length = alloc_length;
3177
3178         admin_queues = &ctrl_info->admin_queues;
3179         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3180                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3181         admin_queues->iq_element_array =
3182                 &admin_queues_aligned->iq_element_array;
3183         admin_queues->oq_element_array =
3184                 &admin_queues_aligned->oq_element_array;
3185         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3186         admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3187
3188         admin_queues->iq_element_array_bus_addr =
3189                 ctrl_info->admin_queue_memory_base_dma_handle +
3190                 (admin_queues->iq_element_array -
3191                 ctrl_info->admin_queue_memory_base);
3192         admin_queues->oq_element_array_bus_addr =
3193                 ctrl_info->admin_queue_memory_base_dma_handle +
3194                 (admin_queues->oq_element_array -
3195                 ctrl_info->admin_queue_memory_base);
3196         admin_queues->iq_ci_bus_addr =
3197                 ctrl_info->admin_queue_memory_base_dma_handle +
3198                 ((void *)admin_queues->iq_ci -
3199                 ctrl_info->admin_queue_memory_base);
3200         admin_queues->oq_pi_bus_addr =
3201                 ctrl_info->admin_queue_memory_base_dma_handle +
3202                 ((void *)admin_queues->oq_pi -
3203                 ctrl_info->admin_queue_memory_base);
3204
3205         return 0;
3206 }
3207
3208 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          HZ
3209 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3210
3211 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3212 {
3213         struct pqi_device_registers __iomem *pqi_registers;
3214         struct pqi_admin_queues *admin_queues;
3215         unsigned long timeout;
3216         u8 status;
3217         u32 reg;
3218
3219         pqi_registers = ctrl_info->pqi_registers;
3220         admin_queues = &ctrl_info->admin_queues;
3221
3222         writeq((u64)admin_queues->iq_element_array_bus_addr,
3223                 &pqi_registers->admin_iq_element_array_addr);
3224         writeq((u64)admin_queues->oq_element_array_bus_addr,
3225                 &pqi_registers->admin_oq_element_array_addr);
3226         writeq((u64)admin_queues->iq_ci_bus_addr,
3227                 &pqi_registers->admin_iq_ci_addr);
3228         writeq((u64)admin_queues->oq_pi_bus_addr,
3229                 &pqi_registers->admin_oq_pi_addr);
3230
3231         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3232                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3233                 (admin_queues->int_msg_num << 16);
3234         writel(reg, &pqi_registers->admin_iq_num_elements);
3235         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3236                 &pqi_registers->function_and_status_code);
3237
3238         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3239         while (1) {
3240                 status = readb(&pqi_registers->function_and_status_code);
3241                 if (status == PQI_STATUS_IDLE)
3242                         break;
3243                 if (time_after(jiffies, timeout))
3244                         return -ETIMEDOUT;
3245                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3246         }
3247
3248         /*
3249          * The offset registers are not initialized to the correct
3250          * offsets until *after* the create admin queue pair command
3251          * completes successfully.
3252          */
3253         admin_queues->iq_pi = ctrl_info->iomem_base +
3254                 PQI_DEVICE_REGISTERS_OFFSET +
3255                 readq(&pqi_registers->admin_iq_pi_offset);
3256         admin_queues->oq_ci = ctrl_info->iomem_base +
3257                 PQI_DEVICE_REGISTERS_OFFSET +
3258                 readq(&pqi_registers->admin_oq_ci_offset);
3259
3260         return 0;
3261 }
3262
3263 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3264         struct pqi_general_admin_request *request)
3265 {
3266         struct pqi_admin_queues *admin_queues;
3267         void *next_element;
3268         pqi_index_t iq_pi;
3269
3270         admin_queues = &ctrl_info->admin_queues;
3271         iq_pi = admin_queues->iq_pi_copy;
3272
3273         next_element = admin_queues->iq_element_array +
3274                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3275
3276         memcpy(next_element, request, sizeof(*request));
3277
3278         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3279         admin_queues->iq_pi_copy = iq_pi;
3280
3281         /*
3282          * This write notifies the controller that an IU is available to be
3283          * processed.
3284          */
3285         writel(iq_pi, admin_queues->iq_pi);
3286 }
3287
3288 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3289         struct pqi_general_admin_response *response)
3290 {
3291         struct pqi_admin_queues *admin_queues;
3292         pqi_index_t oq_pi;
3293         pqi_index_t oq_ci;
3294         unsigned long timeout;
3295
3296         admin_queues = &ctrl_info->admin_queues;
3297         oq_ci = admin_queues->oq_ci_copy;
3298
3299         timeout = (3 * HZ) + jiffies;
3300
3301         while (1) {
3302                 oq_pi = *admin_queues->oq_pi;
3303                 if (oq_pi != oq_ci)
3304                         break;
3305                 if (time_after(jiffies, timeout)) {
3306                         dev_err(&ctrl_info->pci_dev->dev,
3307                                 "timed out waiting for admin response\n");
3308                         return -ETIMEDOUT;
3309                 }
3310                 usleep_range(1000, 2000);
3311         }
3312
3313         memcpy(response, admin_queues->oq_element_array +
3314                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3315
3316         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3317         admin_queues->oq_ci_copy = oq_ci;
3318         writel(oq_ci, admin_queues->oq_ci);
3319
3320         return 0;
3321 }
3322
3323 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3324         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3325         struct pqi_io_request *io_request)
3326 {
3327         struct pqi_io_request *next;
3328         void *next_element;
3329         pqi_index_t iq_pi;
3330         pqi_index_t iq_ci;
3331         size_t iu_length;
3332         unsigned long flags;
3333         unsigned int num_elements_needed;
3334         unsigned int num_elements_to_end_of_queue;
3335         size_t copy_count;
3336         struct pqi_iu_header *request;
3337
3338         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3339
3340         if (io_request)
3341                 list_add_tail(&io_request->request_list_entry,
3342                         &queue_group->request_list[path]);
3343
3344         iq_pi = queue_group->iq_pi_copy[path];
3345
3346         list_for_each_entry_safe(io_request, next,
3347                 &queue_group->request_list[path], request_list_entry) {
3348
3349                 request = io_request->iu;
3350
3351                 iu_length = get_unaligned_le16(&request->iu_length) +
3352                         PQI_REQUEST_HEADER_LENGTH;
3353                 num_elements_needed =
3354                         DIV_ROUND_UP(iu_length,
3355                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3356
3357                 iq_ci = *queue_group->iq_ci[path];
3358
3359                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3360                         ctrl_info->num_elements_per_iq))
3361                         break;
3362
3363                 put_unaligned_le16(queue_group->oq_id,
3364                         &request->response_queue_id);
3365
3366                 next_element = queue_group->iq_element_array[path] +
3367                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3368
3369                 num_elements_to_end_of_queue =
3370                         ctrl_info->num_elements_per_iq - iq_pi;
3371
3372                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3373                         memcpy(next_element, request, iu_length);
3374                 } else {
3375                         copy_count = num_elements_to_end_of_queue *
3376                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3377                         memcpy(next_element, request, copy_count);
3378                         memcpy(queue_group->iq_element_array[path],
3379                                 (u8 *)request + copy_count,
3380                                 iu_length - copy_count);
3381                 }
3382
3383                 iq_pi = (iq_pi + num_elements_needed) %
3384                         ctrl_info->num_elements_per_iq;
3385
3386                 list_del(&io_request->request_list_entry);
3387         }
3388
3389         if (iq_pi != queue_group->iq_pi_copy[path]) {
3390                 queue_group->iq_pi_copy[path] = iq_pi;
3391                 /*
3392                  * This write notifies the controller that one or more IUs are
3393                  * available to be processed.
3394                  */
3395                 writel(iq_pi, queue_group->iq_pi[path]);
3396         }
3397
3398         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3399 }
3400
3401 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3402         void *context)
3403 {
3404         struct completion *waiting = context;
3405
3406         complete(waiting);
3407 }
3408
3409 static int pqi_submit_raid_request_synchronous_with_io_request(
3410         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3411         unsigned long timeout_msecs)
3412 {
3413         int rc = 0;
3414         DECLARE_COMPLETION_ONSTACK(wait);
3415
3416         io_request->io_complete_callback = pqi_raid_synchronous_complete;
3417         io_request->context = &wait;
3418
3419         pqi_start_io(ctrl_info,
3420                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3421                 io_request);
3422
3423         if (timeout_msecs == NO_TIMEOUT) {
3424                 wait_for_completion_io(&wait);
3425         } else {
3426                 if (!wait_for_completion_io_timeout(&wait,
3427                         msecs_to_jiffies(timeout_msecs))) {
3428                         dev_warn(&ctrl_info->pci_dev->dev,
3429                                 "command timed out\n");
3430                         rc = -ETIMEDOUT;
3431                 }
3432         }
3433
3434         return rc;
3435 }
3436
3437 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3438         struct pqi_iu_header *request, unsigned int flags,
3439         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3440 {
3441         int rc;
3442         struct pqi_io_request *io_request;
3443         unsigned long start_jiffies;
3444         unsigned long msecs_blocked;
3445         size_t iu_length;
3446
3447         /*
3448          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3449          * are mutually exclusive.
3450          */
3451
3452         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3453                 if (down_interruptible(&ctrl_info->sync_request_sem))
3454                         return -ERESTARTSYS;
3455         } else {
3456                 if (timeout_msecs == NO_TIMEOUT) {
3457                         down(&ctrl_info->sync_request_sem);
3458                 } else {
3459                         start_jiffies = jiffies;
3460                         if (down_timeout(&ctrl_info->sync_request_sem,
3461                                 msecs_to_jiffies(timeout_msecs)))
3462                                 return -ETIMEDOUT;
3463                         msecs_blocked =
3464                                 jiffies_to_msecs(jiffies - start_jiffies);
3465                         if (msecs_blocked >= timeout_msecs)
3466                                 return -ETIMEDOUT;
3467                         timeout_msecs -= msecs_blocked;
3468                 }
3469         }
3470
3471         io_request = pqi_alloc_io_request(ctrl_info);
3472
3473         put_unaligned_le16(io_request->index,
3474                 &(((struct pqi_raid_path_request *)request)->request_id));
3475
3476         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3477                 ((struct pqi_raid_path_request *)request)->error_index =
3478                         ((struct pqi_raid_path_request *)request)->request_id;
3479
3480         iu_length = get_unaligned_le16(&request->iu_length) +
3481                 PQI_REQUEST_HEADER_LENGTH;
3482         memcpy(io_request->iu, request, iu_length);
3483
3484         rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3485                 io_request, timeout_msecs);
3486
3487         if (error_info) {
3488                 if (io_request->error_info)
3489                         memcpy(error_info, io_request->error_info,
3490                                 sizeof(*error_info));
3491                 else
3492                         memset(error_info, 0, sizeof(*error_info));
3493         } else if (rc == 0 && io_request->error_info) {
3494                 u8 scsi_status;
3495                 struct pqi_raid_error_info *raid_error_info;
3496
3497                 raid_error_info = io_request->error_info;
3498                 scsi_status = raid_error_info->status;
3499
3500                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3501                         raid_error_info->data_out_result ==
3502                         PQI_DATA_IN_OUT_UNDERFLOW)
3503                         scsi_status = SAM_STAT_GOOD;
3504
3505                 if (scsi_status != SAM_STAT_GOOD)
3506                         rc = -EIO;
3507         }
3508
3509         pqi_free_io_request(io_request);
3510
3511         up(&ctrl_info->sync_request_sem);
3512
3513         return rc;
3514 }
3515
3516 static int pqi_validate_admin_response(
3517         struct pqi_general_admin_response *response, u8 expected_function_code)
3518 {
3519         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3520                 return -EINVAL;
3521
3522         if (get_unaligned_le16(&response->header.iu_length) !=
3523                 PQI_GENERAL_ADMIN_IU_LENGTH)
3524                 return -EINVAL;
3525
3526         if (response->function_code != expected_function_code)
3527                 return -EINVAL;
3528
3529         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3530                 return -EINVAL;
3531
3532         return 0;
3533 }
3534
3535 static int pqi_submit_admin_request_synchronous(
3536         struct pqi_ctrl_info *ctrl_info,
3537         struct pqi_general_admin_request *request,
3538         struct pqi_general_admin_response *response)
3539 {
3540         int rc;
3541
3542         pqi_submit_admin_request(ctrl_info, request);
3543
3544         rc = pqi_poll_for_admin_response(ctrl_info, response);
3545
3546         if (rc == 0)
3547                 rc = pqi_validate_admin_response(response,
3548                         request->function_code);
3549
3550         return rc;
3551 }
3552
3553 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3554 {
3555         int rc;
3556         struct pqi_general_admin_request request;
3557         struct pqi_general_admin_response response;
3558         struct pqi_device_capability *capability;
3559         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3560
3561         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3562         if (!capability)
3563                 return -ENOMEM;
3564
3565         memset(&request, 0, sizeof(request));
3566
3567         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3568         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3569                 &request.header.iu_length);
3570         request.function_code =
3571                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3572         put_unaligned_le32(sizeof(*capability),
3573                 &request.data.report_device_capability.buffer_length);
3574
3575         rc = pqi_map_single(ctrl_info->pci_dev,
3576                 &request.data.report_device_capability.sg_descriptor,
3577                 capability, sizeof(*capability),
3578                 PCI_DMA_FROMDEVICE);
3579         if (rc)
3580                 goto out;
3581
3582         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3583                 &response);
3584
3585         pqi_pci_unmap(ctrl_info->pci_dev,
3586                 &request.data.report_device_capability.sg_descriptor, 1,
3587                 PCI_DMA_FROMDEVICE);
3588
3589         if (rc)
3590                 goto out;
3591
3592         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3593                 rc = -EIO;
3594                 goto out;
3595         }
3596
3597         ctrl_info->max_inbound_queues =
3598                 get_unaligned_le16(&capability->max_inbound_queues);
3599         ctrl_info->max_elements_per_iq =
3600                 get_unaligned_le16(&capability->max_elements_per_iq);
3601         ctrl_info->max_iq_element_length =
3602                 get_unaligned_le16(&capability->max_iq_element_length)
3603                 * 16;
3604         ctrl_info->max_outbound_queues =
3605                 get_unaligned_le16(&capability->max_outbound_queues);
3606         ctrl_info->max_elements_per_oq =
3607                 get_unaligned_le16(&capability->max_elements_per_oq);
3608         ctrl_info->max_oq_element_length =
3609                 get_unaligned_le16(&capability->max_oq_element_length)
3610                 * 16;
3611
3612         sop_iu_layer_descriptor =
3613                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3614
3615         ctrl_info->max_inbound_iu_length_per_firmware =
3616                 get_unaligned_le16(
3617                         &sop_iu_layer_descriptor->max_inbound_iu_length);
3618         ctrl_info->inbound_spanning_supported =
3619                 sop_iu_layer_descriptor->inbound_spanning_supported;
3620         ctrl_info->outbound_spanning_supported =
3621                 sop_iu_layer_descriptor->outbound_spanning_supported;
3622
3623 out:
3624         kfree(capability);
3625
3626         return rc;
3627 }
3628
3629 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3630 {
3631         if (ctrl_info->max_iq_element_length <
3632                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3633                 dev_err(&ctrl_info->pci_dev->dev,
3634                         "max. inbound queue element length of %d is less than the required length of %d\n",
3635                         ctrl_info->max_iq_element_length,
3636                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3637                 return -EINVAL;
3638         }
3639
3640         if (ctrl_info->max_oq_element_length <
3641                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3642                 dev_err(&ctrl_info->pci_dev->dev,
3643                         "max. outbound queue element length of %d is less than the required length of %d\n",
3644                         ctrl_info->max_oq_element_length,
3645                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3646                 return -EINVAL;
3647         }
3648
3649         if (ctrl_info->max_inbound_iu_length_per_firmware <
3650                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3651                 dev_err(&ctrl_info->pci_dev->dev,
3652                         "max. inbound IU length of %u is less than the min. required length of %d\n",
3653                         ctrl_info->max_inbound_iu_length_per_firmware,
3654                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3655                 return -EINVAL;
3656         }
3657
3658         if (!ctrl_info->inbound_spanning_supported) {
3659                 dev_err(&ctrl_info->pci_dev->dev,
3660                         "the controller does not support inbound spanning\n");
3661                 return -EINVAL;
3662         }
3663
3664         if (ctrl_info->outbound_spanning_supported) {
3665                 dev_err(&ctrl_info->pci_dev->dev,
3666                         "the controller supports outbound spanning but this driver does not\n");
3667                 return -EINVAL;
3668         }
3669
3670         return 0;
3671 }
3672
3673 static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
3674         bool inbound_queue, u16 queue_id)
3675 {
3676         struct pqi_general_admin_request request;
3677         struct pqi_general_admin_response response;
3678
3679         memset(&request, 0, sizeof(request));
3680         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3681         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3682                 &request.header.iu_length);
3683         if (inbound_queue)
3684                 request.function_code =
3685                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
3686         else
3687                 request.function_code =
3688                         PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
3689         put_unaligned_le16(queue_id,
3690                 &request.data.delete_operational_queue.queue_id);
3691
3692         return pqi_submit_admin_request_synchronous(ctrl_info, &request,
3693                 &response);
3694 }
3695
3696 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3697 {
3698         int rc;
3699         struct pqi_event_queue *event_queue;
3700         struct pqi_general_admin_request request;
3701         struct pqi_general_admin_response response;
3702
3703         event_queue = &ctrl_info->event_queue;
3704
3705         /*
3706          * Create OQ (Outbound Queue - device to host queue) to dedicate
3707          * to events.
3708          */
3709         memset(&request, 0, sizeof(request));
3710         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3711         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3712                 &request.header.iu_length);
3713         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3714         put_unaligned_le16(event_queue->oq_id,
3715                 &request.data.create_operational_oq.queue_id);
3716         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3717                 &request.data.create_operational_oq.element_array_addr);
3718         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3719                 &request.data.create_operational_oq.pi_addr);
3720         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3721                 &request.data.create_operational_oq.num_elements);
3722         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3723                 &request.data.create_operational_oq.element_length);
3724         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3725         put_unaligned_le16(event_queue->int_msg_num,
3726                 &request.data.create_operational_oq.int_msg_num);
3727
3728         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3729                 &response);
3730         if (rc)
3731                 return rc;
3732
3733         event_queue->oq_ci = ctrl_info->iomem_base +
3734                 PQI_DEVICE_REGISTERS_OFFSET +
3735                 get_unaligned_le64(
3736                         &response.data.create_operational_oq.oq_ci_offset);
3737
3738         return 0;
3739 }
3740
3741 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info)
3742 {
3743         unsigned int i;
3744         int rc;
3745         struct pqi_queue_group *queue_group;
3746         struct pqi_general_admin_request request;
3747         struct pqi_general_admin_response response;
3748
3749         i = ctrl_info->num_active_queue_groups;
3750         queue_group = &ctrl_info->queue_groups[i];
3751
3752         /*
3753          * Create IQ (Inbound Queue - host to device queue) for
3754          * RAID path.
3755          */
3756         memset(&request, 0, sizeof(request));
3757         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3758         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3759                 &request.header.iu_length);
3760         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3761         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
3762                 &request.data.create_operational_iq.queue_id);
3763         put_unaligned_le64(
3764                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
3765                 &request.data.create_operational_iq.element_array_addr);
3766         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
3767                 &request.data.create_operational_iq.ci_addr);
3768         put_unaligned_le16(ctrl_info->num_elements_per_iq,
3769                 &request.data.create_operational_iq.num_elements);
3770         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
3771                 &request.data.create_operational_iq.element_length);
3772         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
3773
3774         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3775                 &response);
3776         if (rc) {
3777                 dev_err(&ctrl_info->pci_dev->dev,
3778                         "error creating inbound RAID queue\n");
3779                 return rc;
3780         }
3781
3782         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
3783                 PQI_DEVICE_REGISTERS_OFFSET +
3784                 get_unaligned_le64(
3785                         &response.data.create_operational_iq.iq_pi_offset);
3786
3787         /*
3788          * Create IQ (Inbound Queue - host to device queue) for
3789          * Advanced I/O (AIO) path.
3790          */
3791         memset(&request, 0, sizeof(request));
3792         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3793         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3794                 &request.header.iu_length);
3795         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3796         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
3797                 &request.data.create_operational_iq.queue_id);
3798         put_unaligned_le64((u64)queue_group->
3799                 iq_element_array_bus_addr[AIO_PATH],
3800                 &request.data.create_operational_iq.element_array_addr);
3801         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
3802                 &request.data.create_operational_iq.ci_addr);
3803         put_unaligned_le16(ctrl_info->num_elements_per_iq,
3804                 &request.data.create_operational_iq.num_elements);
3805         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
3806                 &request.data.create_operational_iq.element_length);
3807         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
3808
3809         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3810                 &response);
3811         if (rc) {
3812                 dev_err(&ctrl_info->pci_dev->dev,
3813                         "error creating inbound AIO queue\n");
3814                 goto delete_inbound_queue_raid;
3815         }
3816
3817         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
3818                 PQI_DEVICE_REGISTERS_OFFSET +
3819                 get_unaligned_le64(
3820                         &response.data.create_operational_iq.iq_pi_offset);
3821
3822         /*
3823          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
3824          * assumed to be for RAID path I/O unless we change the queue's
3825          * property.
3826          */
3827         memset(&request, 0, sizeof(request));
3828         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3829         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3830                 &request.header.iu_length);
3831         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
3832         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
3833                 &request.data.change_operational_iq_properties.queue_id);
3834         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
3835                 &request.data.change_operational_iq_properties.vendor_specific);
3836
3837         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3838                 &response);
3839         if (rc) {
3840                 dev_err(&ctrl_info->pci_dev->dev,
3841                         "error changing queue property\n");
3842                 goto delete_inbound_queue_aio;
3843         }
3844
3845         /*
3846          * Create OQ (Outbound Queue - device to host queue).
3847          */
3848         memset(&request, 0, sizeof(request));
3849         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3850         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3851                 &request.header.iu_length);
3852         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3853         put_unaligned_le16(queue_group->oq_id,
3854                 &request.data.create_operational_oq.queue_id);
3855         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
3856                 &request.data.create_operational_oq.element_array_addr);
3857         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
3858                 &request.data.create_operational_oq.pi_addr);
3859         put_unaligned_le16(ctrl_info->num_elements_per_oq,
3860                 &request.data.create_operational_oq.num_elements);
3861         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
3862                 &request.data.create_operational_oq.element_length);
3863         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3864         put_unaligned_le16(queue_group->int_msg_num,
3865                 &request.data.create_operational_oq.int_msg_num);
3866
3867         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3868                 &response);
3869         if (rc) {
3870                 dev_err(&ctrl_info->pci_dev->dev,
3871                         "error creating outbound queue\n");
3872                 goto delete_inbound_queue_aio;
3873         }
3874
3875         queue_group->oq_ci = ctrl_info->iomem_base +
3876                 PQI_DEVICE_REGISTERS_OFFSET +
3877                 get_unaligned_le64(
3878                         &response.data.create_operational_oq.oq_ci_offset);
3879
3880         ctrl_info->num_active_queue_groups++;
3881
3882         return 0;
3883
3884 delete_inbound_queue_aio:
3885         pqi_delete_operational_queue(ctrl_info, true,
3886                 queue_group->iq_id[AIO_PATH]);
3887
3888 delete_inbound_queue_raid:
3889         pqi_delete_operational_queue(ctrl_info, true,
3890                 queue_group->iq_id[RAID_PATH]);
3891
3892         return rc;
3893 }
3894
3895 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
3896 {
3897         int rc;
3898         unsigned int i;
3899
3900         rc = pqi_create_event_queue(ctrl_info);
3901         if (rc) {
3902                 dev_err(&ctrl_info->pci_dev->dev,
3903                         "error creating event queue\n");
3904                 return rc;
3905         }
3906
3907         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3908                 rc = pqi_create_queue_group(ctrl_info);
3909                 if (rc) {
3910                         dev_err(&ctrl_info->pci_dev->dev,
3911                                 "error creating queue group number %u/%u\n",
3912                                 i, ctrl_info->num_queue_groups);
3913                         return rc;
3914                 }
3915         }
3916
3917         return 0;
3918 }
3919
3920 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
3921         (offsetof(struct pqi_event_config, descriptors) + \
3922         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
3923
3924 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info)
3925 {
3926         int rc;
3927         unsigned int i;
3928         struct pqi_event_config *event_config;
3929         struct pqi_general_management_request request;
3930
3931         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
3932                 GFP_KERNEL);
3933         if (!event_config)
3934                 return -ENOMEM;
3935
3936         memset(&request, 0, sizeof(request));
3937
3938         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
3939         put_unaligned_le16(offsetof(struct pqi_general_management_request,
3940                 data.report_event_configuration.sg_descriptors[1]) -
3941                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
3942         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
3943                 &request.data.report_event_configuration.buffer_length);
3944
3945         rc = pqi_map_single(ctrl_info->pci_dev,
3946                 request.data.report_event_configuration.sg_descriptors,
3947                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
3948                 PCI_DMA_FROMDEVICE);
3949         if (rc)
3950                 goto out;
3951
3952         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
3953                 0, NULL, NO_TIMEOUT);
3954
3955         pqi_pci_unmap(ctrl_info->pci_dev,
3956                 request.data.report_event_configuration.sg_descriptors, 1,
3957                 PCI_DMA_FROMDEVICE);
3958
3959         if (rc)
3960                 goto out;
3961
3962         for (i = 0; i < event_config->num_event_descriptors; i++)
3963                 put_unaligned_le16(ctrl_info->event_queue.oq_id,
3964                         &event_config->descriptors[i].oq_id);
3965
3966         memset(&request, 0, sizeof(request));
3967
3968         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
3969         put_unaligned_le16(offsetof(struct pqi_general_management_request,
3970                 data.report_event_configuration.sg_descriptors[1]) -
3971                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
3972         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
3973                 &request.data.report_event_configuration.buffer_length);
3974
3975         rc = pqi_map_single(ctrl_info->pci_dev,
3976                 request.data.report_event_configuration.sg_descriptors,
3977                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
3978                 PCI_DMA_TODEVICE);
3979         if (rc)
3980                 goto out;
3981
3982         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
3983                 NULL, NO_TIMEOUT);
3984
3985         pqi_pci_unmap(ctrl_info->pci_dev,
3986                 request.data.report_event_configuration.sg_descriptors, 1,
3987                 PCI_DMA_TODEVICE);
3988
3989 out:
3990         kfree(event_config);
3991
3992         return rc;
3993 }
3994
3995 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
3996 {
3997         unsigned int i;
3998         struct device *dev;
3999         size_t sg_chain_buffer_length;
4000         struct pqi_io_request *io_request;
4001
4002         if (!ctrl_info->io_request_pool)
4003                 return;
4004
4005         dev = &ctrl_info->pci_dev->dev;
4006         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4007         io_request = ctrl_info->io_request_pool;
4008
4009         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4010                 kfree(io_request->iu);
4011                 if (!io_request->sg_chain_buffer)
4012                         break;
4013                 dma_free_coherent(dev, sg_chain_buffer_length,
4014                         io_request->sg_chain_buffer,
4015                         io_request->sg_chain_buffer_dma_handle);
4016                 io_request++;
4017         }
4018
4019         kfree(ctrl_info->io_request_pool);
4020         ctrl_info->io_request_pool = NULL;
4021 }
4022
4023 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4024 {
4025         ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4026                 ctrl_info->error_buffer_length,
4027                 &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4028
4029         if (!ctrl_info->error_buffer)
4030                 return -ENOMEM;
4031
4032         return 0;
4033 }
4034
4035 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4036 {
4037         unsigned int i;
4038         void *sg_chain_buffer;
4039         size_t sg_chain_buffer_length;
4040         dma_addr_t sg_chain_buffer_dma_handle;
4041         struct device *dev;
4042         struct pqi_io_request *io_request;
4043
4044         ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4045                 sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4046
4047         if (!ctrl_info->io_request_pool) {
4048                 dev_err(&ctrl_info->pci_dev->dev,
4049                         "failed to allocate I/O request pool\n");
4050                 goto error;
4051         }
4052
4053         dev = &ctrl_info->pci_dev->dev;
4054         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4055         io_request = ctrl_info->io_request_pool;
4056
4057         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4058                 io_request->iu =
4059                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4060
4061                 if (!io_request->iu) {
4062                         dev_err(&ctrl_info->pci_dev->dev,
4063                                 "failed to allocate IU buffers\n");
4064                         goto error;
4065                 }
4066
4067                 sg_chain_buffer = dma_alloc_coherent(dev,
4068                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4069                         GFP_KERNEL);
4070
4071                 if (!sg_chain_buffer) {
4072                         dev_err(&ctrl_info->pci_dev->dev,
4073                                 "failed to allocate PQI scatter-gather chain buffers\n");
4074                         goto error;
4075                 }
4076
4077                 io_request->index = i;
4078                 io_request->sg_chain_buffer = sg_chain_buffer;
4079                 io_request->sg_chain_buffer_dma_handle =
4080                         sg_chain_buffer_dma_handle;
4081                 io_request++;
4082         }
4083
4084         return 0;
4085
4086 error:
4087         pqi_free_all_io_requests(ctrl_info);
4088
4089         return -ENOMEM;
4090 }
4091
4092 /*
4093  * Calculate required resources that are sized based on max. outstanding
4094  * requests and max. transfer size.
4095  */
4096
4097 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4098 {
4099         u32 max_transfer_size;
4100         u32 max_sg_entries;
4101
4102         ctrl_info->scsi_ml_can_queue =
4103                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4104         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4105
4106         ctrl_info->error_buffer_length =
4107                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4108
4109         max_transfer_size =
4110                 min(ctrl_info->max_transfer_size, PQI_MAX_TRANSFER_SIZE);
4111
4112         max_sg_entries = max_transfer_size / PAGE_SIZE;
4113
4114         /* +1 to cover when the buffer is not page-aligned. */
4115         max_sg_entries++;
4116
4117         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4118
4119         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4120
4121         ctrl_info->sg_chain_buffer_length =
4122                 max_sg_entries * sizeof(struct pqi_sg_descriptor);
4123         ctrl_info->sg_tablesize = max_sg_entries;
4124         ctrl_info->max_sectors = max_transfer_size / 512;
4125 }
4126
4127 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4128 {
4129         int num_cpus;
4130         int max_queue_groups;
4131         int num_queue_groups;
4132         u16 num_elements_per_iq;
4133         u16 num_elements_per_oq;
4134
4135         max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4136                 ctrl_info->max_outbound_queues - 1);
4137         max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4138
4139         num_cpus = num_online_cpus();
4140         num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4141         num_queue_groups = min(num_queue_groups, max_queue_groups);
4142
4143         ctrl_info->num_queue_groups = num_queue_groups;
4144
4145         /*
4146          * Make sure that the max. inbound IU length is an even multiple
4147          * of our inbound element length.
4148          */
4149         ctrl_info->max_inbound_iu_length =
4150                 (ctrl_info->max_inbound_iu_length_per_firmware /
4151                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4152                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4153
4154         num_elements_per_iq =
4155                 (ctrl_info->max_inbound_iu_length /
4156                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4157
4158         /* Add one because one element in each queue is unusable. */
4159         num_elements_per_iq++;
4160
4161         num_elements_per_iq = min(num_elements_per_iq,
4162                 ctrl_info->max_elements_per_iq);
4163
4164         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4165         num_elements_per_oq = min(num_elements_per_oq,
4166                 ctrl_info->max_elements_per_oq);
4167
4168         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4169         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4170
4171         ctrl_info->max_sg_per_iu =
4172                 ((ctrl_info->max_inbound_iu_length -
4173                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4174                 sizeof(struct pqi_sg_descriptor)) +
4175                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4176 }
4177
4178 static inline void pqi_set_sg_descriptor(
4179         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4180 {
4181         u64 address = (u64)sg_dma_address(sg);
4182         unsigned int length = sg_dma_len(sg);
4183
4184         put_unaligned_le64(address, &sg_descriptor->address);
4185         put_unaligned_le32(length, &sg_descriptor->length);
4186         put_unaligned_le32(0, &sg_descriptor->flags);
4187 }
4188
4189 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4190         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4191         struct pqi_io_request *io_request)
4192 {
4193         int i;
4194         u16 iu_length;
4195         int sg_count;
4196         bool chained;
4197         unsigned int num_sg_in_iu;
4198         unsigned int max_sg_per_iu;
4199         struct scatterlist *sg;
4200         struct pqi_sg_descriptor *sg_descriptor;
4201
4202         sg_count = scsi_dma_map(scmd);
4203         if (sg_count < 0)
4204                 return sg_count;
4205
4206         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4207                 PQI_REQUEST_HEADER_LENGTH;
4208
4209         if (sg_count == 0)
4210                 goto out;
4211
4212         sg = scsi_sglist(scmd);
4213         sg_descriptor = request->sg_descriptors;
4214         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4215         chained = false;
4216         num_sg_in_iu = 0;
4217         i = 0;
4218
4219         while (1) {
4220                 pqi_set_sg_descriptor(sg_descriptor, sg);
4221                 if (!chained)
4222                         num_sg_in_iu++;
4223                 i++;
4224                 if (i == sg_count)
4225                         break;
4226                 sg_descriptor++;
4227                 if (i == max_sg_per_iu) {
4228                         put_unaligned_le64(
4229                                 (u64)io_request->sg_chain_buffer_dma_handle,
4230                                 &sg_descriptor->address);
4231                         put_unaligned_le32((sg_count - num_sg_in_iu)
4232                                 * sizeof(*sg_descriptor),
4233                                 &sg_descriptor->length);
4234                         put_unaligned_le32(CISS_SG_CHAIN,
4235                                 &sg_descriptor->flags);
4236                         chained = true;
4237                         num_sg_in_iu++;
4238                         sg_descriptor = io_request->sg_chain_buffer;
4239                 }
4240                 sg = sg_next(sg);
4241         }
4242
4243         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4244         request->partial = chained;
4245         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4246
4247 out:
4248         put_unaligned_le16(iu_length, &request->header.iu_length);
4249
4250         return 0;
4251 }
4252
4253 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4254         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4255         struct pqi_io_request *io_request)
4256 {
4257         int i;
4258         u16 iu_length;
4259         int sg_count;
4260         bool chained;
4261         unsigned int num_sg_in_iu;
4262         unsigned int max_sg_per_iu;
4263         struct scatterlist *sg;
4264         struct pqi_sg_descriptor *sg_descriptor;
4265
4266         sg_count = scsi_dma_map(scmd);
4267         if (sg_count < 0)
4268                 return sg_count;
4269
4270         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4271                 PQI_REQUEST_HEADER_LENGTH;
4272         num_sg_in_iu = 0;
4273
4274         if (sg_count == 0)
4275                 goto out;
4276
4277         sg = scsi_sglist(scmd);
4278         sg_descriptor = request->sg_descriptors;
4279         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4280         chained = false;
4281         i = 0;
4282
4283         while (1) {
4284                 pqi_set_sg_descriptor(sg_descriptor, sg);
4285                 if (!chained)
4286                         num_sg_in_iu++;
4287                 i++;
4288                 if (i == sg_count)
4289                         break;
4290                 sg_descriptor++;
4291                 if (i == max_sg_per_iu) {
4292                         put_unaligned_le64(
4293                                 (u64)io_request->sg_chain_buffer_dma_handle,
4294                                 &sg_descriptor->address);
4295                         put_unaligned_le32((sg_count - num_sg_in_iu)
4296                                 * sizeof(*sg_descriptor),
4297                                 &sg_descriptor->length);
4298                         put_unaligned_le32(CISS_SG_CHAIN,
4299                                 &sg_descriptor->flags);
4300                         chained = true;
4301                         num_sg_in_iu++;
4302                         sg_descriptor = io_request->sg_chain_buffer;
4303                 }
4304                 sg = sg_next(sg);
4305         }
4306
4307         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4308         request->partial = chained;
4309         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4310
4311 out:
4312         put_unaligned_le16(iu_length, &request->header.iu_length);
4313         request->num_sg_descriptors = num_sg_in_iu;
4314
4315         return 0;
4316 }
4317
4318 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4319         void *context)
4320 {
4321         struct scsi_cmnd *scmd;
4322
4323         scmd = io_request->scmd;
4324         pqi_free_io_request(io_request);
4325         scsi_dma_unmap(scmd);
4326         pqi_scsi_done(scmd);
4327 }
4328
4329 static int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4330         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4331         struct pqi_queue_group *queue_group)
4332 {
4333         int rc;
4334         size_t cdb_length;
4335         struct pqi_io_request *io_request;
4336         struct pqi_raid_path_request *request;
4337
4338         io_request = pqi_alloc_io_request(ctrl_info);
4339         io_request->io_complete_callback = pqi_raid_io_complete;
4340         io_request->scmd = scmd;
4341
4342         scmd->host_scribble = (unsigned char *)io_request;
4343
4344         request = io_request->iu;
4345         memset(request, 0,
4346                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4347
4348         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4349         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4350         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4351         put_unaligned_le16(io_request->index, &request->request_id);
4352         request->error_index = request->request_id;
4353         memcpy(request->lun_number, device->scsi3addr,
4354                 sizeof(request->lun_number));
4355
4356         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4357         memcpy(request->cdb, scmd->cmnd, cdb_length);
4358
4359         switch (cdb_length) {
4360         case 6:
4361         case 10:
4362         case 12:
4363         case 16:
4364                 /* No bytes in the Additional CDB bytes field */
4365                 request->additional_cdb_bytes_usage =
4366                         SOP_ADDITIONAL_CDB_BYTES_0;
4367                 break;
4368         case 20:
4369                 /* 4 bytes in the Additional cdb field */
4370                 request->additional_cdb_bytes_usage =
4371                         SOP_ADDITIONAL_CDB_BYTES_4;
4372                 break;
4373         case 24:
4374                 /* 8 bytes in the Additional cdb field */
4375                 request->additional_cdb_bytes_usage =
4376                         SOP_ADDITIONAL_CDB_BYTES_8;
4377                 break;
4378         case 28:
4379                 /* 12 bytes in the Additional cdb field */
4380                 request->additional_cdb_bytes_usage =
4381                         SOP_ADDITIONAL_CDB_BYTES_12;
4382                 break;
4383         case 32:
4384         default:
4385                 /* 16 bytes in the Additional cdb field */
4386                 request->additional_cdb_bytes_usage =
4387                         SOP_ADDITIONAL_CDB_BYTES_16;
4388                 break;
4389         }
4390
4391         switch (scmd->sc_data_direction) {
4392         case DMA_TO_DEVICE:
4393                 request->data_direction = SOP_READ_FLAG;
4394                 break;
4395         case DMA_FROM_DEVICE:
4396                 request->data_direction = SOP_WRITE_FLAG;
4397                 break;
4398         case DMA_NONE:
4399                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4400                 break;
4401         case DMA_BIDIRECTIONAL:
4402                 request->data_direction = SOP_BIDIRECTIONAL;
4403                 break;
4404         default:
4405                 dev_err(&ctrl_info->pci_dev->dev,
4406                         "unknown data direction: %d\n",
4407                         scmd->sc_data_direction);
4408                 WARN_ON(scmd->sc_data_direction);
4409                 break;
4410         }
4411
4412         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4413         if (rc) {
4414                 pqi_free_io_request(io_request);
4415                 return SCSI_MLQUEUE_HOST_BUSY;
4416         }
4417
4418         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4419
4420         return 0;
4421 }
4422
4423 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4424         void *context)
4425 {
4426         struct scsi_cmnd *scmd;
4427
4428         scmd = io_request->scmd;
4429         scsi_dma_unmap(scmd);
4430         if (io_request->status == -EAGAIN)
4431                 set_host_byte(scmd, DID_IMM_RETRY);
4432         pqi_free_io_request(io_request);
4433         pqi_scsi_done(scmd);
4434 }
4435
4436 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4437         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4438         struct pqi_queue_group *queue_group)
4439 {
4440         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4441                 scmd->cmnd, scmd->cmd_len, queue_group, NULL);
4442 }
4443
4444 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4445         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4446         unsigned int cdb_length, struct pqi_queue_group *queue_group,
4447         struct pqi_encryption_info *encryption_info)
4448 {
4449         int rc;
4450         struct pqi_io_request *io_request;
4451         struct pqi_aio_path_request *request;
4452
4453         io_request = pqi_alloc_io_request(ctrl_info);
4454         io_request->io_complete_callback = pqi_aio_io_complete;
4455         io_request->scmd = scmd;
4456
4457         scmd->host_scribble = (unsigned char *)io_request;
4458
4459         request = io_request->iu;
4460         memset(request, 0,
4461                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4462
4463         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4464         put_unaligned_le32(aio_handle, &request->nexus_id);
4465         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4466         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4467         put_unaligned_le16(io_request->index, &request->request_id);
4468         request->error_index = request->request_id;
4469         if (cdb_length > sizeof(request->cdb))
4470                 cdb_length = sizeof(request->cdb);
4471         request->cdb_length = cdb_length;
4472         memcpy(request->cdb, cdb, cdb_length);
4473
4474         switch (scmd->sc_data_direction) {
4475         case DMA_TO_DEVICE:
4476                 request->data_direction = SOP_READ_FLAG;
4477                 break;
4478         case DMA_FROM_DEVICE:
4479                 request->data_direction = SOP_WRITE_FLAG;
4480                 break;
4481         case DMA_NONE:
4482                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4483                 break;
4484         case DMA_BIDIRECTIONAL:
4485                 request->data_direction = SOP_BIDIRECTIONAL;
4486                 break;
4487         default:
4488                 dev_err(&ctrl_info->pci_dev->dev,
4489                         "unknown data direction: %d\n",
4490                         scmd->sc_data_direction);
4491                 WARN_ON(scmd->sc_data_direction);
4492                 break;
4493         }
4494
4495         if (encryption_info) {
4496                 request->encryption_enable = true;
4497                 put_unaligned_le16(encryption_info->data_encryption_key_index,
4498                         &request->data_encryption_key_index);
4499                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4500                         &request->encrypt_tweak_lower);
4501                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4502                         &request->encrypt_tweak_upper);
4503         }
4504
4505         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4506         if (rc) {
4507                 pqi_free_io_request(io_request);
4508                 return SCSI_MLQUEUE_HOST_BUSY;
4509         }
4510
4511         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4512
4513         return 0;
4514 }
4515
4516 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4517         struct scsi_cmnd *scmd)
4518 {
4519         int rc;
4520         struct pqi_ctrl_info *ctrl_info;
4521         struct pqi_scsi_dev *device;
4522         u16 hwq;
4523         struct pqi_queue_group *queue_group;
4524         bool raid_bypassed;
4525
4526         device = scmd->device->hostdata;
4527         ctrl_info = shost_to_hba(shost);
4528
4529         if (pqi_ctrl_offline(ctrl_info)) {
4530                 set_host_byte(scmd, DID_NO_CONNECT);
4531                 pqi_scsi_done(scmd);
4532                 return 0;
4533         }
4534
4535         /*
4536          * This is necessary because the SML doesn't zero out this field during
4537          * error recovery.
4538          */
4539         scmd->result = 0;
4540
4541         hwq = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4542         if (hwq >= ctrl_info->num_queue_groups)
4543                 hwq = 0;
4544
4545         queue_group = &ctrl_info->queue_groups[hwq];
4546
4547         if (pqi_is_logical_device(device)) {
4548                 raid_bypassed = false;
4549                 if (device->offload_enabled &&
4550                         scmd->request->cmd_type == REQ_TYPE_FS) {
4551                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
4552                                 scmd, queue_group);
4553                         if (rc == 0 ||
4554                                 rc == SCSI_MLQUEUE_HOST_BUSY ||
4555                                 rc == SAM_STAT_CHECK_CONDITION ||
4556                                 rc == SAM_STAT_RESERVATION_CONFLICT)
4557                                 raid_bypassed = true;
4558                 }
4559                 if (!raid_bypassed)
4560                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4561                                 queue_group);
4562         } else {
4563                 if (device->aio_enabled)
4564                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
4565                                 queue_group);
4566                 else
4567                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4568                                 queue_group);
4569         }
4570
4571         return rc;
4572 }
4573
4574 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
4575         void *context)
4576 {
4577         struct completion *waiting = context;
4578
4579         complete(waiting);
4580 }
4581
4582 #define PQI_LUN_RESET_TIMEOUT_SECS      10
4583
4584 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
4585         struct pqi_scsi_dev *device, struct completion *wait)
4586 {
4587         int rc;
4588         unsigned int wait_secs = 0;
4589
4590         while (1) {
4591                 if (wait_for_completion_io_timeout(wait,
4592                         PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
4593                         rc = 0;
4594                         break;
4595                 }
4596
4597                 pqi_check_ctrl_health(ctrl_info);
4598                 if (pqi_ctrl_offline(ctrl_info)) {
4599                         rc = -ETIMEDOUT;
4600                         break;
4601                 }
4602
4603                 wait_secs += PQI_LUN_RESET_TIMEOUT_SECS;
4604
4605                 dev_err(&ctrl_info->pci_dev->dev,
4606                         "resetting scsi %d:%d:%d:%d - waiting %u seconds\n",
4607                         ctrl_info->scsi_host->host_no, device->bus,
4608                         device->target, device->lun, wait_secs);
4609         }
4610
4611         return rc;
4612 }
4613
4614 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
4615         struct pqi_scsi_dev *device)
4616 {
4617         int rc;
4618         struct pqi_io_request *io_request;
4619         DECLARE_COMPLETION_ONSTACK(wait);
4620         struct pqi_task_management_request *request;
4621
4622         down(&ctrl_info->lun_reset_sem);
4623
4624         io_request = pqi_alloc_io_request(ctrl_info);
4625         io_request->io_complete_callback = pqi_lun_reset_complete;
4626         io_request->context = &wait;
4627
4628         request = io_request->iu;
4629         memset(request, 0, sizeof(*request));
4630
4631         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
4632         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
4633                 &request->header.iu_length);
4634         put_unaligned_le16(io_request->index, &request->request_id);
4635         memcpy(request->lun_number, device->scsi3addr,
4636                 sizeof(request->lun_number));
4637         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
4638
4639         pqi_start_io(ctrl_info,
4640                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4641                 io_request);
4642
4643         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
4644         if (rc == 0)
4645                 rc = io_request->status;
4646
4647         pqi_free_io_request(io_request);
4648         up(&ctrl_info->lun_reset_sem);
4649
4650         return rc;
4651 }
4652
4653 /* Performs a reset at the LUN level. */
4654
4655 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
4656         struct pqi_scsi_dev *device)
4657 {
4658         int rc;
4659
4660         pqi_check_ctrl_health(ctrl_info);
4661         if (pqi_ctrl_offline(ctrl_info))
4662                 return FAILED;
4663
4664         rc = pqi_lun_reset(ctrl_info, device);
4665
4666         return rc == 0 ? SUCCESS : FAILED;
4667 }
4668
4669 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
4670 {
4671         int rc;
4672         struct pqi_ctrl_info *ctrl_info;
4673         struct pqi_scsi_dev *device;
4674
4675         ctrl_info = shost_to_hba(scmd->device->host);
4676         device = scmd->device->hostdata;
4677
4678         dev_err(&ctrl_info->pci_dev->dev,
4679                 "resetting scsi %d:%d:%d:%d\n",
4680                 ctrl_info->scsi_host->host_no,
4681                 device->bus, device->target, device->lun);
4682
4683         rc = pqi_device_reset(ctrl_info, device);
4684
4685         dev_err(&ctrl_info->pci_dev->dev,
4686                 "reset of scsi %d:%d:%d:%d: %s\n",
4687                 ctrl_info->scsi_host->host_no,
4688                 device->bus, device->target, device->lun,
4689                 rc == SUCCESS ? "SUCCESS" : "FAILED");
4690
4691         return rc;
4692 }
4693
4694 static int pqi_slave_alloc(struct scsi_device *sdev)
4695 {
4696         struct pqi_scsi_dev *device;
4697         unsigned long flags;
4698         struct pqi_ctrl_info *ctrl_info;
4699         struct scsi_target *starget;
4700         struct sas_rphy *rphy;
4701
4702         ctrl_info = shost_to_hba(sdev->host);
4703
4704         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
4705
4706         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
4707                 starget = scsi_target(sdev);
4708                 rphy = target_to_rphy(starget);
4709                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
4710                 if (device) {
4711                         device->target = sdev_id(sdev);
4712                         device->lun = sdev->lun;
4713                         device->target_lun_valid = true;
4714                 }
4715         } else {
4716                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
4717                         sdev_id(sdev), sdev->lun);
4718         }
4719
4720         if (device && device->expose_device) {
4721                 sdev->hostdata = device;
4722                 device->sdev = sdev;
4723                 if (device->queue_depth) {
4724                         device->advertised_queue_depth = device->queue_depth;
4725                         scsi_change_queue_depth(sdev,
4726                                 device->advertised_queue_depth);
4727                 }
4728         }
4729
4730         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
4731
4732         return 0;
4733 }
4734
4735 static int pqi_slave_configure(struct scsi_device *sdev)
4736 {
4737         struct pqi_scsi_dev *device;
4738
4739         device = sdev->hostdata;
4740         if (!device->expose_device)
4741                 sdev->no_uld_attach = true;
4742
4743         return 0;
4744 }
4745
4746 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
4747         void __user *arg)
4748 {
4749         struct pci_dev *pci_dev;
4750         u32 subsystem_vendor;
4751         u32 subsystem_device;
4752         cciss_pci_info_struct pciinfo;
4753
4754         if (!arg)
4755                 return -EINVAL;
4756
4757         pci_dev = ctrl_info->pci_dev;
4758
4759         pciinfo.domain = pci_domain_nr(pci_dev->bus);
4760         pciinfo.bus = pci_dev->bus->number;
4761         pciinfo.dev_fn = pci_dev->devfn;
4762         subsystem_vendor = pci_dev->subsystem_vendor;
4763         subsystem_device = pci_dev->subsystem_device;
4764         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
4765                 subsystem_vendor;
4766
4767         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
4768                 return -EFAULT;
4769
4770         return 0;
4771 }
4772
4773 static int pqi_getdrivver_ioctl(void __user *arg)
4774 {
4775         u32 version;
4776
4777         if (!arg)
4778                 return -EINVAL;
4779
4780         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
4781                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
4782
4783         if (copy_to_user(arg, &version, sizeof(version)))
4784                 return -EFAULT;
4785
4786         return 0;
4787 }
4788
4789 struct ciss_error_info {
4790         u8      scsi_status;
4791         int     command_status;
4792         size_t  sense_data_length;
4793 };
4794
4795 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
4796         struct ciss_error_info *ciss_error_info)
4797 {
4798         int ciss_cmd_status;
4799         size_t sense_data_length;
4800
4801         switch (pqi_error_info->data_out_result) {
4802         case PQI_DATA_IN_OUT_GOOD:
4803                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
4804                 break;
4805         case PQI_DATA_IN_OUT_UNDERFLOW:
4806                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
4807                 break;
4808         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
4809                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
4810                 break;
4811         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
4812         case PQI_DATA_IN_OUT_BUFFER_ERROR:
4813         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
4814         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
4815         case PQI_DATA_IN_OUT_ERROR:
4816                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
4817                 break;
4818         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
4819         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
4820         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
4821         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
4822         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
4823         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
4824         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
4825         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
4826         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
4827         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
4828                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
4829                 break;
4830         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
4831                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
4832                 break;
4833         case PQI_DATA_IN_OUT_ABORTED:
4834                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
4835                 break;
4836         case PQI_DATA_IN_OUT_TIMEOUT:
4837                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
4838                 break;
4839         default:
4840                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
4841                 break;
4842         }
4843
4844         sense_data_length =
4845                 get_unaligned_le16(&pqi_error_info->sense_data_length);
4846         if (sense_data_length == 0)
4847                 sense_data_length =
4848                 get_unaligned_le16(&pqi_error_info->response_data_length);
4849         if (sense_data_length)
4850                 if (sense_data_length > sizeof(pqi_error_info->data))
4851                         sense_data_length = sizeof(pqi_error_info->data);
4852
4853         ciss_error_info->scsi_status = pqi_error_info->status;
4854         ciss_error_info->command_status = ciss_cmd_status;
4855         ciss_error_info->sense_data_length = sense_data_length;
4856 }
4857
4858 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
4859 {
4860         int rc;
4861         char *kernel_buffer = NULL;
4862         u16 iu_length;
4863         size_t sense_data_length;
4864         IOCTL_Command_struct iocommand;
4865         struct pqi_raid_path_request request;
4866         struct pqi_raid_error_info pqi_error_info;
4867         struct ciss_error_info ciss_error_info;
4868
4869         if (pqi_ctrl_offline(ctrl_info))
4870                 return -ENXIO;
4871         if (!arg)
4872                 return -EINVAL;
4873         if (!capable(CAP_SYS_RAWIO))
4874                 return -EPERM;
4875         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
4876                 return -EFAULT;
4877         if (iocommand.buf_size < 1 &&
4878                 iocommand.Request.Type.Direction != XFER_NONE)
4879                 return -EINVAL;
4880         if (iocommand.Request.CDBLen > sizeof(request.cdb))
4881                 return -EINVAL;
4882         if (iocommand.Request.Type.Type != TYPE_CMD)
4883                 return -EINVAL;
4884
4885         switch (iocommand.Request.Type.Direction) {
4886         case XFER_NONE:
4887         case XFER_WRITE:
4888         case XFER_READ:
4889                 break;
4890         default:
4891                 return -EINVAL;
4892         }
4893
4894         if (iocommand.buf_size > 0) {
4895                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
4896                 if (!kernel_buffer)
4897                         return -ENOMEM;
4898                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
4899                         if (copy_from_user(kernel_buffer, iocommand.buf,
4900                                 iocommand.buf_size)) {
4901                                 rc = -EFAULT;
4902                                 goto out;
4903                         }
4904                 } else {
4905                         memset(kernel_buffer, 0, iocommand.buf_size);
4906                 }
4907         }
4908
4909         memset(&request, 0, sizeof(request));
4910
4911         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4912         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4913                 PQI_REQUEST_HEADER_LENGTH;
4914         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
4915                 sizeof(request.lun_number));
4916         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
4917         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
4918
4919         switch (iocommand.Request.Type.Direction) {
4920         case XFER_NONE:
4921                 request.data_direction = SOP_NO_DIRECTION_FLAG;
4922                 break;
4923         case XFER_WRITE:
4924                 request.data_direction = SOP_WRITE_FLAG;
4925                 break;
4926         case XFER_READ:
4927                 request.data_direction = SOP_READ_FLAG;
4928                 break;
4929         }
4930
4931         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4932
4933         if (iocommand.buf_size > 0) {
4934                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
4935
4936                 rc = pqi_map_single(ctrl_info->pci_dev,
4937                         &request.sg_descriptors[0], kernel_buffer,
4938                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
4939                 if (rc)
4940                         goto out;
4941
4942                 iu_length += sizeof(request.sg_descriptors[0]);
4943         }
4944
4945         put_unaligned_le16(iu_length, &request.header.iu_length);
4946
4947         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4948                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
4949
4950         if (iocommand.buf_size > 0)
4951                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
4952                         PCI_DMA_BIDIRECTIONAL);
4953
4954         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
4955
4956         if (rc == 0) {
4957                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
4958                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
4959                 iocommand.error_info.CommandStatus =
4960                         ciss_error_info.command_status;
4961                 sense_data_length = ciss_error_info.sense_data_length;
4962                 if (sense_data_length) {
4963                         if (sense_data_length >
4964                                 sizeof(iocommand.error_info.SenseInfo))
4965                                 sense_data_length =
4966                                         sizeof(iocommand.error_info.SenseInfo);
4967                         memcpy(iocommand.error_info.SenseInfo,
4968                                 pqi_error_info.data, sense_data_length);
4969                         iocommand.error_info.SenseLen = sense_data_length;
4970                 }
4971         }
4972
4973         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
4974                 rc = -EFAULT;
4975                 goto out;
4976         }
4977
4978         if (rc == 0 && iocommand.buf_size > 0 &&
4979                 (iocommand.Request.Type.Direction & XFER_READ)) {
4980                 if (copy_to_user(iocommand.buf, kernel_buffer,
4981                         iocommand.buf_size)) {
4982                         rc = -EFAULT;
4983                 }
4984         }
4985
4986 out:
4987         kfree(kernel_buffer);
4988
4989         return rc;
4990 }
4991
4992 static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
4993 {
4994         int rc;
4995         struct pqi_ctrl_info *ctrl_info;
4996
4997         ctrl_info = shost_to_hba(sdev->host);
4998
4999         switch (cmd) {
5000         case CCISS_DEREGDISK:
5001         case CCISS_REGNEWDISK:
5002         case CCISS_REGNEWD:
5003                 rc = pqi_scan_scsi_devices(ctrl_info);
5004                 break;
5005         case CCISS_GETPCIINFO:
5006                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5007                 break;
5008         case CCISS_GETDRIVVER:
5009                 rc = pqi_getdrivver_ioctl(arg);
5010                 break;
5011         case CCISS_PASSTHRU:
5012                 rc = pqi_passthru_ioctl(ctrl_info, arg);
5013                 break;
5014         default:
5015                 rc = -EINVAL;
5016                 break;
5017         }
5018
5019         return rc;
5020 }
5021
5022 static ssize_t pqi_version_show(struct device *dev,
5023         struct device_attribute *attr, char *buffer)
5024 {
5025         ssize_t count = 0;
5026         struct Scsi_Host *shost;
5027         struct pqi_ctrl_info *ctrl_info;
5028
5029         shost = class_to_shost(dev);
5030         ctrl_info = shost_to_hba(shost);
5031
5032         count += snprintf(buffer + count, PAGE_SIZE - count,
5033                 "  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5034
5035         count += snprintf(buffer + count, PAGE_SIZE - count,
5036                 "firmware: %s\n", ctrl_info->firmware_version);
5037
5038         return count;
5039 }
5040
5041 static ssize_t pqi_host_rescan_store(struct device *dev,
5042         struct device_attribute *attr, const char *buffer, size_t count)
5043 {
5044         struct Scsi_Host *shost = class_to_shost(dev);
5045
5046         pqi_scan_start(shost);
5047
5048         return count;
5049 }
5050
5051 static DEVICE_ATTR(version, S_IRUGO, pqi_version_show, NULL);
5052 static DEVICE_ATTR(rescan, S_IWUSR, NULL, pqi_host_rescan_store);
5053
5054 static struct device_attribute *pqi_shost_attrs[] = {
5055         &dev_attr_version,
5056         &dev_attr_rescan,
5057         NULL
5058 };
5059
5060 static ssize_t pqi_sas_address_show(struct device *dev,
5061         struct device_attribute *attr, char *buffer)
5062 {
5063         struct pqi_ctrl_info *ctrl_info;
5064         struct scsi_device *sdev;
5065         struct pqi_scsi_dev *device;
5066         unsigned long flags;
5067         u64 sas_address;
5068
5069         sdev = to_scsi_device(dev);
5070         ctrl_info = shost_to_hba(sdev->host);
5071
5072         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5073
5074         device = sdev->hostdata;
5075         if (pqi_is_logical_device(device)) {
5076                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5077                         flags);
5078                 return -ENODEV;
5079         }
5080         sas_address = device->sas_address;
5081
5082         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5083
5084         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5085 }
5086
5087 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5088         struct device_attribute *attr, char *buffer)
5089 {
5090         struct pqi_ctrl_info *ctrl_info;
5091         struct scsi_device *sdev;
5092         struct pqi_scsi_dev *device;
5093         unsigned long flags;
5094
5095         sdev = to_scsi_device(dev);
5096         ctrl_info = shost_to_hba(sdev->host);
5097
5098         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5099
5100         device = sdev->hostdata;
5101         buffer[0] = device->offload_enabled ? '1' : '0';
5102         buffer[1] = '\n';
5103         buffer[2] = '\0';
5104
5105         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5106
5107         return 2;
5108 }
5109
5110 static DEVICE_ATTR(sas_address, S_IRUGO, pqi_sas_address_show, NULL);
5111 static DEVICE_ATTR(ssd_smart_path_enabled, S_IRUGO,
5112         pqi_ssd_smart_path_enabled_show, NULL);
5113
5114 static struct device_attribute *pqi_sdev_attrs[] = {
5115         &dev_attr_sas_address,
5116         &dev_attr_ssd_smart_path_enabled,
5117         NULL
5118 };
5119
5120 static struct scsi_host_template pqi_driver_template = {
5121         .module = THIS_MODULE,
5122         .name = DRIVER_NAME_SHORT,
5123         .proc_name = DRIVER_NAME_SHORT,
5124         .queuecommand = pqi_scsi_queue_command,
5125         .scan_start = pqi_scan_start,
5126         .scan_finished = pqi_scan_finished,
5127         .this_id = -1,
5128         .use_clustering = ENABLE_CLUSTERING,
5129         .eh_device_reset_handler = pqi_eh_device_reset_handler,
5130         .ioctl = pqi_ioctl,
5131         .slave_alloc = pqi_slave_alloc,
5132         .slave_configure = pqi_slave_configure,
5133         .sdev_attrs = pqi_sdev_attrs,
5134         .shost_attrs = pqi_shost_attrs,
5135 };
5136
5137 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5138 {
5139         int rc;
5140         struct Scsi_Host *shost;
5141
5142         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5143         if (!shost) {
5144                 dev_err(&ctrl_info->pci_dev->dev,
5145                         "scsi_host_alloc failed for controller %u\n",
5146                         ctrl_info->ctrl_id);
5147                 return -ENOMEM;
5148         }
5149
5150         shost->io_port = 0;
5151         shost->n_io_port = 0;
5152         shost->this_id = -1;
5153         shost->max_channel = PQI_MAX_BUS;
5154         shost->max_cmd_len = MAX_COMMAND_SIZE;
5155         shost->max_lun = ~0;
5156         shost->max_id = ~0;
5157         shost->max_sectors = ctrl_info->max_sectors;
5158         shost->can_queue = ctrl_info->scsi_ml_can_queue;
5159         shost->cmd_per_lun = shost->can_queue;
5160         shost->sg_tablesize = ctrl_info->sg_tablesize;
5161         shost->transportt = pqi_sas_transport_template;
5162         shost->irq = ctrl_info->msix_vectors[0];
5163         shost->unique_id = shost->irq;
5164         shost->nr_hw_queues = ctrl_info->num_queue_groups;
5165         shost->hostdata[0] = (unsigned long)ctrl_info;
5166
5167         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5168         if (rc) {
5169                 dev_err(&ctrl_info->pci_dev->dev,
5170                         "scsi_add_host failed for controller %u\n",
5171                         ctrl_info->ctrl_id);
5172                 goto free_host;
5173         }
5174
5175         rc = pqi_add_sas_host(shost, ctrl_info);
5176         if (rc) {
5177                 dev_err(&ctrl_info->pci_dev->dev,
5178                         "add SAS host failed for controller %u\n",
5179                         ctrl_info->ctrl_id);
5180                 goto remove_host;
5181         }
5182
5183         ctrl_info->scsi_host = shost;
5184
5185         return 0;
5186
5187 remove_host:
5188         scsi_remove_host(shost);
5189 free_host:
5190         scsi_host_put(shost);
5191
5192         return rc;
5193 }
5194
5195 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5196 {
5197         struct Scsi_Host *shost;
5198
5199         pqi_delete_sas_host(ctrl_info);
5200
5201         shost = ctrl_info->scsi_host;
5202         if (!shost)
5203                 return;
5204
5205         scsi_remove_host(shost);
5206         scsi_host_put(shost);
5207 }
5208
5209 #define PQI_RESET_ACTION_RESET          0x1
5210
5211 #define PQI_RESET_TYPE_NO_RESET         0x0
5212 #define PQI_RESET_TYPE_SOFT_RESET       0x1
5213 #define PQI_RESET_TYPE_FIRM_RESET       0x2
5214 #define PQI_RESET_TYPE_HARD_RESET       0x3
5215
5216 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5217 {
5218         int rc;
5219         u32 reset_params;
5220
5221         reset_params = (PQI_RESET_ACTION_RESET << 5) |
5222                 PQI_RESET_TYPE_HARD_RESET;
5223
5224         writel(reset_params,
5225                 &ctrl_info->pqi_registers->device_reset);
5226
5227         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
5228         if (rc)
5229                 dev_err(&ctrl_info->pci_dev->dev,
5230                         "PQI reset failed\n");
5231
5232         return rc;
5233 }
5234
5235 static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5236 {
5237         int rc;
5238         struct bmic_identify_controller *identify;
5239
5240         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5241         if (!identify)
5242                 return -ENOMEM;
5243
5244         rc = pqi_identify_controller(ctrl_info, identify);
5245         if (rc)
5246                 goto out;
5247
5248         memcpy(ctrl_info->firmware_version, identify->firmware_version,
5249                 sizeof(identify->firmware_version));
5250         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5251         snprintf(ctrl_info->firmware_version +
5252                 strlen(ctrl_info->firmware_version),
5253                 sizeof(ctrl_info->firmware_version),
5254                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
5255
5256 out:
5257         kfree(identify);
5258
5259         return rc;
5260 }
5261
5262 static int pqi_kdump_init(struct pqi_ctrl_info *ctrl_info)
5263 {
5264         if (!sis_is_firmware_running(ctrl_info))
5265                 return -ENXIO;
5266
5267         if (pqi_get_ctrl_mode(ctrl_info) == PQI_MODE) {
5268                 sis_disable_msix(ctrl_info);
5269                 if (pqi_reset(ctrl_info) == 0)
5270                         sis_reenable_sis_mode(ctrl_info);
5271         }
5272
5273         return 0;
5274 }
5275
5276 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
5277 {
5278         int rc;
5279
5280         if (reset_devices) {
5281                 rc = pqi_kdump_init(ctrl_info);
5282                 if (rc)
5283                         return rc;
5284         }
5285
5286         /*
5287          * When the controller comes out of reset, it is always running
5288          * in legacy SIS mode.  This is so that it can be compatible
5289          * with legacy drivers shipped with OSes.  So we have to talk
5290          * to it using SIS commands at first.  Once we are satisified
5291          * that the controller supports PQI, we transition it into PQI
5292          * mode.
5293          */
5294
5295         /*
5296          * Wait until the controller is ready to start accepting SIS
5297          * commands.
5298          */
5299         rc = sis_wait_for_ctrl_ready(ctrl_info);
5300         if (rc) {
5301                 dev_err(&ctrl_info->pci_dev->dev,
5302                         "error initializing SIS interface\n");
5303                 return rc;
5304         }
5305
5306         /*
5307          * Get the controller properties.  This allows us to determine
5308          * whether or not it supports PQI mode.
5309          */
5310         rc = sis_get_ctrl_properties(ctrl_info);
5311         if (rc) {
5312                 dev_err(&ctrl_info->pci_dev->dev,
5313                         "error obtaining controller properties\n");
5314                 return rc;
5315         }
5316
5317         rc = sis_get_pqi_capabilities(ctrl_info);
5318         if (rc) {
5319                 dev_err(&ctrl_info->pci_dev->dev,
5320                         "error obtaining controller capabilities\n");
5321                 return rc;
5322         }
5323
5324         if (ctrl_info->max_outstanding_requests > PQI_MAX_OUTSTANDING_REQUESTS)
5325                 ctrl_info->max_outstanding_requests =
5326                         PQI_MAX_OUTSTANDING_REQUESTS;
5327
5328         pqi_calculate_io_resources(ctrl_info);
5329
5330         rc = pqi_alloc_error_buffer(ctrl_info);
5331         if (rc) {
5332                 dev_err(&ctrl_info->pci_dev->dev,
5333                         "failed to allocate PQI error buffer\n");
5334                 return rc;
5335         }
5336
5337         /*
5338          * If the function we are about to call succeeds, the
5339          * controller will transition from legacy SIS mode
5340          * into PQI mode.
5341          */
5342         rc = sis_init_base_struct_addr(ctrl_info);
5343         if (rc) {
5344                 dev_err(&ctrl_info->pci_dev->dev,
5345                         "error initializing PQI mode\n");
5346                 return rc;
5347         }
5348
5349         /* Wait for the controller to complete the SIS -> PQI transition. */
5350         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
5351         if (rc) {
5352                 dev_err(&ctrl_info->pci_dev->dev,
5353                         "transition to PQI mode failed\n");
5354                 return rc;
5355         }
5356
5357         /* From here on, we are running in PQI mode. */
5358         ctrl_info->pqi_mode_enabled = true;
5359         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
5360
5361         rc = pqi_alloc_admin_queues(ctrl_info);
5362         if (rc) {
5363                 dev_err(&ctrl_info->pci_dev->dev,
5364                         "error allocating admin queues\n");
5365                 return rc;
5366         }
5367
5368         rc = pqi_create_admin_queues(ctrl_info);
5369         if (rc) {
5370                 dev_err(&ctrl_info->pci_dev->dev,
5371                         "error creating admin queues\n");
5372                 return rc;
5373         }
5374
5375         rc = pqi_report_device_capability(ctrl_info);
5376         if (rc) {
5377                 dev_err(&ctrl_info->pci_dev->dev,
5378                         "obtaining device capability failed\n");
5379                 return rc;
5380         }
5381
5382         rc = pqi_validate_device_capability(ctrl_info);
5383         if (rc)
5384                 return rc;
5385
5386         pqi_calculate_queue_resources(ctrl_info);
5387
5388         rc = pqi_enable_msix_interrupts(ctrl_info);
5389         if (rc)
5390                 return rc;
5391
5392         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
5393                 ctrl_info->max_msix_vectors =
5394                         ctrl_info->num_msix_vectors_enabled;
5395                 pqi_calculate_queue_resources(ctrl_info);
5396         }
5397
5398         rc = pqi_alloc_io_resources(ctrl_info);
5399         if (rc)
5400                 return rc;
5401
5402         rc = pqi_alloc_operational_queues(ctrl_info);
5403         if (rc)
5404                 return rc;
5405
5406         pqi_init_operational_queues(ctrl_info);
5407
5408         rc = pqi_request_irqs(ctrl_info);
5409         if (rc)
5410                 return rc;
5411
5412         pqi_irq_set_affinity_hint(ctrl_info);
5413
5414         rc = pqi_create_queues(ctrl_info);
5415         if (rc)
5416                 return rc;
5417
5418         sis_enable_msix(ctrl_info);
5419
5420         rc = pqi_configure_events(ctrl_info);
5421         if (rc) {
5422                 dev_err(&ctrl_info->pci_dev->dev,
5423                         "error configuring events\n");
5424                 return rc;
5425         }
5426
5427         pqi_start_heartbeat_timer(ctrl_info);
5428
5429         ctrl_info->controller_online = true;
5430
5431         /* Register with the SCSI subsystem. */
5432         rc = pqi_register_scsi(ctrl_info);
5433         if (rc)
5434                 return rc;
5435
5436         rc = pqi_get_ctrl_firmware_version(ctrl_info);
5437         if (rc) {
5438                 dev_err(&ctrl_info->pci_dev->dev,
5439                         "error obtaining firmware version\n");
5440                 return rc;
5441         }
5442
5443         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
5444         if (rc) {
5445                 dev_err(&ctrl_info->pci_dev->dev,
5446                         "error updating host wellness\n");
5447                 return rc;
5448         }
5449
5450         pqi_schedule_update_time_worker(ctrl_info);
5451
5452         pqi_scan_scsi_devices(ctrl_info);
5453
5454         return 0;
5455 }
5456
5457 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
5458 {
5459         int rc;
5460         u64 mask;
5461
5462         rc = pci_enable_device(ctrl_info->pci_dev);
5463         if (rc) {
5464                 dev_err(&ctrl_info->pci_dev->dev,
5465                         "failed to enable PCI device\n");
5466                 return rc;
5467         }
5468
5469         if (sizeof(dma_addr_t) > 4)
5470                 mask = DMA_BIT_MASK(64);
5471         else
5472                 mask = DMA_BIT_MASK(32);
5473
5474         rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
5475         if (rc) {
5476                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
5477                 goto disable_device;
5478         }
5479
5480         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
5481         if (rc) {
5482                 dev_err(&ctrl_info->pci_dev->dev,
5483                         "failed to obtain PCI resources\n");
5484                 goto disable_device;
5485         }
5486
5487         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
5488                 ctrl_info->pci_dev, 0),
5489                 sizeof(struct pqi_ctrl_registers));
5490         if (!ctrl_info->iomem_base) {
5491                 dev_err(&ctrl_info->pci_dev->dev,
5492                         "failed to map memory for controller registers\n");
5493                 rc = -ENOMEM;
5494                 goto release_regions;
5495         }
5496
5497         ctrl_info->registers = ctrl_info->iomem_base;
5498         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
5499
5500         /* Enable bus mastering. */
5501         pci_set_master(ctrl_info->pci_dev);
5502
5503         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
5504
5505         return 0;
5506
5507 release_regions:
5508         pci_release_regions(ctrl_info->pci_dev);
5509 disable_device:
5510         pci_disable_device(ctrl_info->pci_dev);
5511
5512         return rc;
5513 }
5514
5515 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
5516 {
5517         iounmap(ctrl_info->iomem_base);
5518         pci_release_regions(ctrl_info->pci_dev);
5519         pci_disable_device(ctrl_info->pci_dev);
5520         pci_set_drvdata(ctrl_info->pci_dev, NULL);
5521 }
5522
5523 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
5524 {
5525         struct pqi_ctrl_info *ctrl_info;
5526
5527         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
5528                         GFP_KERNEL, numa_node);
5529         if (!ctrl_info)
5530                 return NULL;
5531
5532         mutex_init(&ctrl_info->scan_mutex);
5533
5534         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
5535         spin_lock_init(&ctrl_info->scsi_device_list_lock);
5536
5537         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
5538         atomic_set(&ctrl_info->num_interrupts, 0);
5539
5540         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
5541         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
5542
5543         sema_init(&ctrl_info->sync_request_sem,
5544                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
5545         sema_init(&ctrl_info->lun_reset_sem, PQI_RESERVED_IO_SLOTS_LUN_RESET);
5546
5547         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
5548         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
5549
5550         return ctrl_info;
5551 }
5552
5553 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
5554 {
5555         kfree(ctrl_info);
5556 }
5557
5558 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
5559 {
5560         pqi_irq_unset_affinity_hint(ctrl_info);
5561         pqi_free_irqs(ctrl_info);
5562         if (ctrl_info->num_msix_vectors_enabled)
5563                 pci_disable_msix(ctrl_info->pci_dev);
5564 }
5565
5566 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
5567 {
5568         pqi_stop_heartbeat_timer(ctrl_info);
5569         pqi_free_interrupts(ctrl_info);
5570         if (ctrl_info->queue_memory_base)
5571                 dma_free_coherent(&ctrl_info->pci_dev->dev,
5572                         ctrl_info->queue_memory_length,
5573                         ctrl_info->queue_memory_base,
5574                         ctrl_info->queue_memory_base_dma_handle);
5575         if (ctrl_info->admin_queue_memory_base)
5576                 dma_free_coherent(&ctrl_info->pci_dev->dev,
5577                         ctrl_info->admin_queue_memory_length,
5578                         ctrl_info->admin_queue_memory_base,
5579                         ctrl_info->admin_queue_memory_base_dma_handle);
5580         pqi_free_all_io_requests(ctrl_info);
5581         if (ctrl_info->error_buffer)
5582                 dma_free_coherent(&ctrl_info->pci_dev->dev,
5583                         ctrl_info->error_buffer_length,
5584                         ctrl_info->error_buffer,
5585                         ctrl_info->error_buffer_dma_handle);
5586         if (ctrl_info->iomem_base)
5587                 pqi_cleanup_pci_init(ctrl_info);
5588         pqi_free_ctrl_info(ctrl_info);
5589 }
5590
5591 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
5592 {
5593         cancel_delayed_work_sync(&ctrl_info->rescan_work);
5594         cancel_delayed_work_sync(&ctrl_info->update_time_work);
5595         pqi_remove_all_scsi_devices(ctrl_info);
5596         pqi_unregister_scsi(ctrl_info);
5597
5598         if (ctrl_info->pqi_mode_enabled) {
5599                 sis_disable_msix(ctrl_info);
5600                 if (pqi_reset(ctrl_info) == 0)
5601                         sis_reenable_sis_mode(ctrl_info);
5602         }
5603         pqi_free_ctrl_resources(ctrl_info);
5604 }
5605
5606 static void pqi_print_ctrl_info(struct pci_dev *pdev,
5607         const struct pci_device_id *id)
5608 {
5609         char *ctrl_description;
5610
5611         if (id->driver_data) {
5612                 ctrl_description = (char *)id->driver_data;
5613         } else {
5614                 switch (id->subvendor) {
5615                 case PCI_VENDOR_ID_HP:
5616                         ctrl_description = hpe_branded_controller;
5617                         break;
5618                 case PCI_VENDOR_ID_ADAPTEC2:
5619                 default:
5620                         ctrl_description = microsemi_branded_controller;
5621                         break;
5622                 }
5623         }
5624
5625         dev_info(&pdev->dev, "%s found\n", ctrl_description);
5626 }
5627
5628 static int pqi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
5629 {
5630         int rc;
5631         int node;
5632         struct pqi_ctrl_info *ctrl_info;
5633
5634         pqi_print_ctrl_info(pdev, id);
5635
5636         if (pqi_disable_device_id_wildcards &&
5637                 id->subvendor == PCI_ANY_ID &&
5638                 id->subdevice == PCI_ANY_ID) {
5639                 dev_warn(&pdev->dev,
5640                         "controller not probed because device ID wildcards are disabled\n");
5641                 return -ENODEV;
5642         }
5643
5644         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
5645                 dev_warn(&pdev->dev,
5646                         "controller device ID matched using wildcards\n");
5647
5648         node = dev_to_node(&pdev->dev);
5649         if (node == NUMA_NO_NODE)
5650                 set_dev_node(&pdev->dev, 0);
5651
5652         ctrl_info = pqi_alloc_ctrl_info(node);
5653         if (!ctrl_info) {
5654                 dev_err(&pdev->dev,
5655                         "failed to allocate controller info block\n");
5656                 return -ENOMEM;
5657         }
5658
5659         ctrl_info->pci_dev = pdev;
5660
5661         rc = pqi_pci_init(ctrl_info);
5662         if (rc)
5663                 goto error;
5664
5665         rc = pqi_ctrl_init(ctrl_info);
5666         if (rc)
5667                 goto error;
5668
5669         return 0;
5670
5671 error:
5672         pqi_remove_ctrl(ctrl_info);
5673
5674         return rc;
5675 }
5676
5677 static void pqi_pci_remove(struct pci_dev *pdev)
5678 {
5679         struct pqi_ctrl_info *ctrl_info;
5680
5681         ctrl_info = pci_get_drvdata(pdev);
5682         if (!ctrl_info)
5683                 return;
5684
5685         pqi_remove_ctrl(ctrl_info);
5686 }
5687
5688 static void pqi_shutdown(struct pci_dev *pdev)
5689 {
5690         int rc;
5691         struct pqi_ctrl_info *ctrl_info;
5692
5693         ctrl_info = pci_get_drvdata(pdev);
5694         if (!ctrl_info)
5695                 goto error;
5696
5697         /*
5698          * Write all data in the controller's battery-backed cache to
5699          * storage.
5700          */
5701         rc = pqi_flush_cache(ctrl_info);
5702         if (rc == 0)
5703                 return;
5704
5705 error:
5706         dev_warn(&pdev->dev,
5707                 "unable to flush controller cache\n");
5708 }
5709
5710 /* Define the PCI IDs for the controllers that we support. */
5711 static const struct pci_device_id pqi_pci_id_table[] = {
5712         {
5713                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5714                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
5715         },
5716         {
5717                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5718                                PCI_VENDOR_ID_HP, 0x0600)
5719         },
5720         {
5721                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5722                                PCI_VENDOR_ID_HP, 0x0601)
5723         },
5724         {
5725                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5726                                PCI_VENDOR_ID_HP, 0x0602)
5727         },
5728         {
5729                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5730                                PCI_VENDOR_ID_HP, 0x0603)
5731         },
5732         {
5733                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5734                                PCI_VENDOR_ID_HP, 0x0650)
5735         },
5736         {
5737                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5738                                PCI_VENDOR_ID_HP, 0x0651)
5739         },
5740         {
5741                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5742                                PCI_VENDOR_ID_HP, 0x0652)
5743         },
5744         {
5745                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5746                                PCI_VENDOR_ID_HP, 0x0653)
5747         },
5748         {
5749                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5750                                PCI_VENDOR_ID_HP, 0x0654)
5751         },
5752         {
5753                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5754                                PCI_VENDOR_ID_HP, 0x0655)
5755         },
5756         {
5757                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5758                                PCI_VENDOR_ID_HP, 0x0700)
5759         },
5760         {
5761                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5762                                PCI_VENDOR_ID_HP, 0x0701)
5763         },
5764         {
5765                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5766                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
5767         },
5768         {
5769                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5770                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
5771         },
5772         {
5773                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5774                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
5775         },
5776         {
5777                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5778                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
5779         },
5780         {
5781                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5782                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
5783         },
5784         {
5785                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5786                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
5787         },
5788         {
5789                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5790                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
5791         },
5792         {
5793                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5794                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
5795         },
5796         {
5797                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5798                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
5799         },
5800         {
5801                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5802                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
5803         },
5804         {
5805                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5806                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
5807         },
5808         {
5809                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5810                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
5811         },
5812         {
5813                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5814                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
5815         },
5816         {
5817                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5818                                PCI_VENDOR_ID_HP, 0x1001)
5819         },
5820         {
5821                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5822                                PCI_VENDOR_ID_HP, 0x1100)
5823         },
5824         {
5825                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5826                                PCI_VENDOR_ID_HP, 0x1101)
5827         },
5828         {
5829                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5830                                PCI_VENDOR_ID_HP, 0x1102)
5831         },
5832         {
5833                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5834                                PCI_VENDOR_ID_HP, 0x1150)
5835         },
5836         {
5837                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
5838                                PCI_ANY_ID, PCI_ANY_ID)
5839         },
5840         { 0 }
5841 };
5842
5843 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
5844
5845 static struct pci_driver pqi_pci_driver = {
5846         .name = DRIVER_NAME_SHORT,
5847         .id_table = pqi_pci_id_table,
5848         .probe = pqi_pci_probe,
5849         .remove = pqi_pci_remove,
5850         .shutdown = pqi_shutdown,
5851 };
5852
5853 static int __init pqi_init(void)
5854 {
5855         int rc;
5856
5857         pr_info(DRIVER_NAME "\n");
5858
5859         pqi_sas_transport_template =
5860                 sas_attach_transport(&pqi_sas_transport_functions);
5861         if (!pqi_sas_transport_template)
5862                 return -ENODEV;
5863
5864         rc = pci_register_driver(&pqi_pci_driver);
5865         if (rc)
5866                 sas_release_transport(pqi_sas_transport_template);
5867
5868         return rc;
5869 }
5870
5871 static void __exit pqi_cleanup(void)
5872 {
5873         pci_unregister_driver(&pqi_pci_driver);
5874         sas_release_transport(pqi_sas_transport_template);
5875 }
5876
5877 module_init(pqi_init);
5878 module_exit(pqi_cleanup);
5879
5880 static void __attribute__((unused)) verify_structures(void)
5881 {
5882         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5883                 sis_host_to_ctrl_doorbell) != 0x20);
5884         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5885                 sis_interrupt_mask) != 0x34);
5886         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5887                 sis_ctrl_to_host_doorbell) != 0x9c);
5888         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5889                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
5890         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5891                 sis_driver_scratch) != 0xb0);
5892         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5893                 sis_firmware_status) != 0xbc);
5894         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5895                 sis_mailbox) != 0x1000);
5896         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
5897                 pqi_registers) != 0x4000);
5898
5899         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
5900                 iu_type) != 0x0);
5901         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
5902                 iu_length) != 0x2);
5903         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
5904                 response_queue_id) != 0x4);
5905         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
5906                 work_area) != 0x6);
5907         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
5908
5909         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5910                 status) != 0x0);
5911         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5912                 service_response) != 0x1);
5913         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5914                 data_present) != 0x2);
5915         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5916                 reserved) != 0x3);
5917         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5918                 residual_count) != 0x4);
5919         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5920                 data_length) != 0x8);
5921         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5922                 reserved1) != 0xa);
5923         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
5924                 data) != 0xc);
5925         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
5926
5927         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5928                 data_in_result) != 0x0);
5929         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5930                 data_out_result) != 0x1);
5931         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5932                 reserved) != 0x2);
5933         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5934                 status) != 0x5);
5935         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5936                 status_qualifier) != 0x6);
5937         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5938                 sense_data_length) != 0x8);
5939         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5940                 response_data_length) != 0xa);
5941         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5942                 data_in_transferred) != 0xc);
5943         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5944                 data_out_transferred) != 0x10);
5945         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
5946                 data) != 0x14);
5947         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
5948
5949         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5950                 signature) != 0x0);
5951         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5952                 function_and_status_code) != 0x8);
5953         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5954                 max_admin_iq_elements) != 0x10);
5955         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5956                 max_admin_oq_elements) != 0x11);
5957         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5958                 admin_iq_element_length) != 0x12);
5959         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5960                 admin_oq_element_length) != 0x13);
5961         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5962                 max_reset_timeout) != 0x14);
5963         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5964                 legacy_intx_status) != 0x18);
5965         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5966                 legacy_intx_mask_set) != 0x1c);
5967         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5968                 legacy_intx_mask_clear) != 0x20);
5969         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5970                 device_status) != 0x40);
5971         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5972                 admin_iq_pi_offset) != 0x48);
5973         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5974                 admin_oq_ci_offset) != 0x50);
5975         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5976                 admin_iq_element_array_addr) != 0x58);
5977         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5978                 admin_oq_element_array_addr) != 0x60);
5979         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5980                 admin_iq_ci_addr) != 0x68);
5981         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5982                 admin_oq_pi_addr) != 0x70);
5983         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5984                 admin_iq_num_elements) != 0x78);
5985         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5986                 admin_oq_num_elements) != 0x79);
5987         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5988                 admin_queue_int_msg_num) != 0x7a);
5989         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5990                 device_error) != 0x80);
5991         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5992                 error_details) != 0x88);
5993         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5994                 device_reset) != 0x90);
5995         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
5996                 power_action) != 0x94);
5997         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
5998
5999         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6000                 header.iu_type) != 0);
6001         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6002                 header.iu_length) != 2);
6003         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6004                 header.work_area) != 6);
6005         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6006                 request_id) != 8);
6007         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6008                 function_code) != 10);
6009         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6010                 data.report_device_capability.buffer_length) != 44);
6011         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6012                 data.report_device_capability.sg_descriptor) != 48);
6013         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6014                 data.create_operational_iq.queue_id) != 12);
6015         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6016                 data.create_operational_iq.element_array_addr) != 16);
6017         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6018                 data.create_operational_iq.ci_addr) != 24);
6019         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6020                 data.create_operational_iq.num_elements) != 32);
6021         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6022                 data.create_operational_iq.element_length) != 34);
6023         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6024                 data.create_operational_iq.queue_protocol) != 36);
6025         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6026                 data.create_operational_oq.queue_id) != 12);
6027         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6028                 data.create_operational_oq.element_array_addr) != 16);
6029         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6030                 data.create_operational_oq.pi_addr) != 24);
6031         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6032                 data.create_operational_oq.num_elements) != 32);
6033         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6034                 data.create_operational_oq.element_length) != 34);
6035         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6036                 data.create_operational_oq.queue_protocol) != 36);
6037         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6038                 data.create_operational_oq.int_msg_num) != 40);
6039         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6040                 data.create_operational_oq.coalescing_count) != 42);
6041         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6042                 data.create_operational_oq.min_coalescing_time) != 44);
6043         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6044                 data.create_operational_oq.max_coalescing_time) != 48);
6045         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
6046                 data.delete_operational_queue.queue_id) != 12);
6047         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
6048         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
6049                 data.create_operational_iq) != 64 - 11);
6050         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
6051                 data.create_operational_oq) != 64 - 11);
6052         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
6053                 data.delete_operational_queue) != 64 - 11);
6054
6055         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6056                 header.iu_type) != 0);
6057         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6058                 header.iu_length) != 2);
6059         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6060                 header.work_area) != 6);
6061         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6062                 request_id) != 8);
6063         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6064                 function_code) != 10);
6065         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6066                 status) != 11);
6067         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6068                 data.create_operational_iq.status_descriptor) != 12);
6069         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6070                 data.create_operational_iq.iq_pi_offset) != 16);
6071         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6072                 data.create_operational_oq.status_descriptor) != 12);
6073         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
6074                 data.create_operational_oq.oq_ci_offset) != 16);
6075         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
6076
6077         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6078                 header.iu_type) != 0);
6079         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6080                 header.iu_length) != 2);
6081         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6082                 header.response_queue_id) != 4);
6083         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6084                 header.work_area) != 6);
6085         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6086                 request_id) != 8);
6087         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6088                 nexus_id) != 10);
6089         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6090                 buffer_length) != 12);
6091         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6092                 lun_number) != 16);
6093         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6094                 protocol_specific) != 24);
6095         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6096                 error_index) != 27);
6097         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6098                 cdb) != 32);
6099         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
6100                 sg_descriptors) != 64);
6101         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
6102                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
6103
6104         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6105                 header.iu_type) != 0);
6106         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6107                 header.iu_length) != 2);
6108         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6109                 header.response_queue_id) != 4);
6110         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6111                 header.work_area) != 6);
6112         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6113                 request_id) != 8);
6114         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6115                 nexus_id) != 12);
6116         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6117                 buffer_length) != 16);
6118         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6119                 data_encryption_key_index) != 22);
6120         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6121                 encrypt_tweak_lower) != 24);
6122         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6123                 encrypt_tweak_upper) != 28);
6124         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6125                 cdb) != 32);
6126         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6127                 error_index) != 48);
6128         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6129                 num_sg_descriptors) != 50);
6130         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6131                 cdb_length) != 51);
6132         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6133                 lun_number) != 52);
6134         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
6135                 sg_descriptors) != 64);
6136         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
6137                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
6138
6139         BUILD_BUG_ON(offsetof(struct pqi_io_response,
6140                 header.iu_type) != 0);
6141         BUILD_BUG_ON(offsetof(struct pqi_io_response,
6142                 header.iu_length) != 2);
6143         BUILD_BUG_ON(offsetof(struct pqi_io_response,
6144                 request_id) != 8);
6145         BUILD_BUG_ON(offsetof(struct pqi_io_response,
6146                 error_index) != 10);
6147
6148         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6149                 header.iu_type) != 0);
6150         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6151                 header.iu_length) != 2);
6152         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6153                 header.response_queue_id) != 4);
6154         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6155                 request_id) != 8);
6156         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6157                 data.report_event_configuration.buffer_length) != 12);
6158         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6159                 data.report_event_configuration.sg_descriptors) != 16);
6160         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6161                 data.set_event_configuration.global_event_oq_id) != 10);
6162         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6163                 data.set_event_configuration.buffer_length) != 12);
6164         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
6165                 data.set_event_configuration.sg_descriptors) != 16);
6166
6167         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
6168                 max_inbound_iu_length) != 6);
6169         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
6170                 max_outbound_iu_length) != 14);
6171         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
6172
6173         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6174                 data_length) != 0);
6175         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6176                 iq_arbitration_priority_support_bitmask) != 8);
6177         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6178                 maximum_aw_a) != 9);
6179         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6180                 maximum_aw_b) != 10);
6181         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6182                 maximum_aw_c) != 11);
6183         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6184                 max_inbound_queues) != 16);
6185         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6186                 max_elements_per_iq) != 18);
6187         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6188                 max_iq_element_length) != 24);
6189         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6190                 min_iq_element_length) != 26);
6191         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6192                 max_outbound_queues) != 30);
6193         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6194                 max_elements_per_oq) != 32);
6195         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6196                 intr_coalescing_time_granularity) != 34);
6197         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6198                 max_oq_element_length) != 36);
6199         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6200                 min_oq_element_length) != 38);
6201         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
6202                 iu_layer_descriptors) != 64);
6203         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
6204
6205         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
6206                 event_type) != 0);
6207         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
6208                 oq_id) != 2);
6209         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
6210
6211         BUILD_BUG_ON(offsetof(struct pqi_event_config,
6212                 num_event_descriptors) != 2);
6213         BUILD_BUG_ON(offsetof(struct pqi_event_config,
6214                 descriptors) != 4);
6215
6216         BUILD_BUG_ON(offsetof(struct pqi_event_response,
6217                 header.iu_type) != 0);
6218         BUILD_BUG_ON(offsetof(struct pqi_event_response,
6219                 header.iu_length) != 2);
6220         BUILD_BUG_ON(offsetof(struct pqi_event_response,
6221                 event_type) != 8);
6222         BUILD_BUG_ON(offsetof(struct pqi_event_response,
6223                 event_id) != 10);
6224         BUILD_BUG_ON(offsetof(struct pqi_event_response,
6225                 additional_event_id) != 12);
6226         BUILD_BUG_ON(offsetof(struct pqi_event_response,
6227                 data) != 16);
6228         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
6229
6230         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
6231                 header.iu_type) != 0);
6232         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
6233                 header.iu_length) != 2);
6234         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
6235                 event_type) != 8);
6236         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
6237                 event_id) != 10);
6238         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
6239                 additional_event_id) != 12);
6240         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
6241
6242         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6243                 header.iu_type) != 0);
6244         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6245                 header.iu_length) != 2);
6246         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6247                 request_id) != 8);
6248         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6249                 nexus_id) != 10);
6250         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6251                 lun_number) != 16);
6252         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6253                 protocol_specific) != 24);
6254         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6255                 outbound_queue_id_to_manage) != 26);
6256         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6257                 request_id_to_manage) != 28);
6258         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
6259                 task_management_function) != 30);
6260         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
6261
6262         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
6263                 header.iu_type) != 0);
6264         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
6265                 header.iu_length) != 2);
6266         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
6267                 request_id) != 8);
6268         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
6269                 nexus_id) != 10);
6270         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
6271                 additional_response_info) != 12);
6272         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
6273                 response_code) != 15);
6274         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
6275
6276         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
6277                 configured_logical_drive_count) != 0);
6278         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
6279                 configuration_signature) != 1);
6280         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
6281                 firmware_version) != 5);
6282         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
6283                 extended_logical_unit_count) != 154);
6284         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
6285                 firmware_build_number) != 190);
6286         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
6287                 controller_mode) != 292);
6288
6289         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
6290         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
6291         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
6292                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
6293         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
6294                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
6295         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
6296         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
6297                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
6298         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
6299         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
6300                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
6301
6302         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
6303 }