drivers/scsi/hisi_sas/hisi_sas_main.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2015 Linaro Ltd.
   4  * Copyright (c) 2015 Hisilicon Limited.
   5  */
   6
   7 #include "hisi_sas.h"
   8 #define DRV_NAME "hisi_sas"
   9
  10 #define DEV_IS_GONE(dev) \
  11         ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  12
  13 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  14 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  15                                 void *funcdata);
  16 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  17                                   struct domain_device *device);
  18 static void hisi_sas_dev_gone(struct domain_device *device);
  19
  20 struct hisi_sas_internal_abort_data {
  21         bool rst_ha_timeout; /* reset the HA for timeout */
  22 };
  23
  24 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  25 {
  26         switch (fis->command) {
  27         case ATA_CMD_FPDMA_WRITE:
  28         case ATA_CMD_FPDMA_READ:
  29         case ATA_CMD_FPDMA_RECV:
  30         case ATA_CMD_FPDMA_SEND:
  31         case ATA_CMD_NCQ_NON_DATA:
  32                 return HISI_SAS_SATA_PROTOCOL_FPDMA;
  33
  34         case ATA_CMD_DOWNLOAD_MICRO:
  35         case ATA_CMD_ID_ATA:
  36         case ATA_CMD_PMP_READ:
  37         case ATA_CMD_READ_LOG_EXT:
  38         case ATA_CMD_PIO_READ:
  39         case ATA_CMD_PIO_READ_EXT:
  40         case ATA_CMD_PMP_WRITE:
  41         case ATA_CMD_WRITE_LOG_EXT:
  42         case ATA_CMD_PIO_WRITE:
  43         case ATA_CMD_PIO_WRITE_EXT:
  44                 return HISI_SAS_SATA_PROTOCOL_PIO;
  45
  46         case ATA_CMD_DSM:
  47         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  48         case ATA_CMD_PMP_READ_DMA:
  49         case ATA_CMD_PMP_WRITE_DMA:
  50         case ATA_CMD_READ:
  51         case ATA_CMD_READ_EXT:
  52         case ATA_CMD_READ_LOG_DMA_EXT:
  53         case ATA_CMD_READ_STREAM_DMA_EXT:
  54         case ATA_CMD_TRUSTED_RCV_DMA:
  55         case ATA_CMD_TRUSTED_SND_DMA:
  56         case ATA_CMD_WRITE:
  57         case ATA_CMD_WRITE_EXT:
  58         case ATA_CMD_WRITE_FUA_EXT:
  59         case ATA_CMD_WRITE_QUEUED:
  60         case ATA_CMD_WRITE_LOG_DMA_EXT:
  61         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  62         case ATA_CMD_ZAC_MGMT_IN:
  63                 return HISI_SAS_SATA_PROTOCOL_DMA;
  64
  65         case ATA_CMD_CHK_POWER:
  66         case ATA_CMD_DEV_RESET:
  67         case ATA_CMD_EDD:
  68         case ATA_CMD_FLUSH:
  69         case ATA_CMD_FLUSH_EXT:
  70         case ATA_CMD_VERIFY:
  71         case ATA_CMD_VERIFY_EXT:
  72         case ATA_CMD_SET_FEATURES:
  73         case ATA_CMD_STANDBY:
  74         case ATA_CMD_STANDBYNOW1:
  75         case ATA_CMD_ZAC_MGMT_OUT:
  76                 return HISI_SAS_SATA_PROTOCOL_NONDATA;
  77
  78         case ATA_CMD_SET_MAX:
  79                 switch (fis->features) {
  80                 case ATA_SET_MAX_PASSWD:
  81                 case ATA_SET_MAX_LOCK:
  82                         return HISI_SAS_SATA_PROTOCOL_PIO;
  83
  84                 case ATA_SET_MAX_PASSWD_DMA:
  85                 case ATA_SET_MAX_UNLOCK_DMA:
  86                         return HISI_SAS_SATA_PROTOCOL_DMA;
  87
  88                 default:
  89                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  90                 }
  91
  92         default:
  93         {
  94                 if (direction == DMA_NONE)
  95                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  96                 return HISI_SAS_SATA_PROTOCOL_PIO;
  97         }
  98         }
  99 }
 100 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 101
 102 void hisi_sas_sata_done(struct sas_task *task,
 103                             struct hisi_sas_slot *slot)
 104 {
 105         struct task_status_struct *ts = &task->task_status;
 106         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 107         struct hisi_sas_status_buffer *status_buf =
 108                         hisi_sas_status_buf_addr_mem(slot);
 109         u8 *iu = &status_buf->iu[0];
 110         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 111
 112         resp->frame_len = sizeof(struct dev_to_host_fis);
 113         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 114
 115         ts->buf_valid_size = sizeof(*resp);
 116 }
 117 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 118
 119 /*
 120  * This function assumes linkrate mask fits in 8 bits, which it
 121  * does for all HW versions supported.
 122  */
 123 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 124 {
 125         u8 rate = 0;
 126         int i;
 127
 128         max -= SAS_LINK_RATE_1_5_GBPS;
 129         for (i = 0; i <= max; i++)
 130                 rate |= 1 << (i * 2);
 131         return rate;
 132 }
 133 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 134
 135 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 136 {
 137         return device->port->ha->lldd_ha;
 138 }
 139
 140 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 141 {
 142         return container_of(sas_port, struct hisi_sas_port, sas_port);
 143 }
 144 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 145
 146 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 147 {
 148         int phy_no;
 149
 150         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 151                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 152 }
 153 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 154
 155 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 156 {
 157         void *bitmap = hisi_hba->slot_index_tags;
 158
 159         __clear_bit(slot_idx, bitmap);
 160 }
 161
 162 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 163 {
 164         if (hisi_hba->hw->slot_index_alloc ||
 165             slot_idx < HISI_SAS_RESERVED_IPTT) {
 166                 spin_lock(&hisi_hba->lock);
 167                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 168                 spin_unlock(&hisi_hba->lock);
 169         }
 170 }
 171
 172 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 173 {
 174         void *bitmap = hisi_hba->slot_index_tags;
 175
 176         __set_bit(slot_idx, bitmap);
 177 }
 178
 179 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 180                                      struct request *rq)
 181 {
 182         int index;
 183         void *bitmap = hisi_hba->slot_index_tags;
 184
 185         if (rq)
 186                 return rq->tag + HISI_SAS_RESERVED_IPTT;
 187
 188         spin_lock(&hisi_hba->lock);
 189         index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT,
 190                                    hisi_hba->last_slot_index + 1);
 191         if (index >= HISI_SAS_RESERVED_IPTT) {
 192                 index = find_next_zero_bit(bitmap,
 193                                 HISI_SAS_RESERVED_IPTT,
 194                                 0);
 195                 if (index >= HISI_SAS_RESERVED_IPTT) {
 196                         spin_unlock(&hisi_hba->lock);
 197                         return -SAS_QUEUE_FULL;
 198                 }
 199         }
 200         hisi_sas_slot_index_set(hisi_hba, index);
 201         hisi_hba->last_slot_index = index;
 202         spin_unlock(&hisi_hba->lock);
 203
 204         return index;
 205 }
 206
 207 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 208                              struct hisi_sas_slot *slot, bool need_lock)
 209 {
 210         int device_id = slot->device_id;
 211         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 212
 213         if (task) {
 214                 struct device *dev = hisi_hba->dev;
 215
 216                 if (!task->lldd_task)
 217                         return;
 218
 219                 task->lldd_task = NULL;
 220
 221                 if (!sas_protocol_ata(task->task_proto)) {
 222                         if (slot->n_elem) {
 223                                 if (task->task_proto & SAS_PROTOCOL_SSP)
 224                                         dma_unmap_sg(dev, task->scatter,
 225                                                      task->num_scatter,
 226                                                      task->data_dir);
 227                                 else
 228                                         dma_unmap_sg(dev, &task->smp_task.smp_req,
 229                                                      1, DMA_TO_DEVICE);
 230                         }
 231                         if (slot->n_elem_dif) {
 232                                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 233                                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 234
 235                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 236                                              scsi_prot_sg_count(scsi_cmnd),
 237                                              task->data_dir);
 238                         }
 239                 }
 240         }
 241
 242         if (need_lock) {
 243                 spin_lock(&sas_dev->lock);
 244                 list_del_init(&slot->entry);
 245                 spin_unlock(&sas_dev->lock);
 246         } else {
 247                 list_del_init(&slot->entry);
 248         }
 249
 250         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 251
 252         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 253 }
 254 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 255
 256 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 257                                   struct hisi_sas_slot *slot)
 258 {
 259         hisi_hba->hw->prep_smp(hisi_hba, slot);
 260 }
 261
 262 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 263                                   struct hisi_sas_slot *slot)
 264 {
 265         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 266 }
 267
 268 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 269                                   struct hisi_sas_slot *slot)
 270 {
 271         hisi_hba->hw->prep_stp(hisi_hba, slot);
 272 }
 273
 274 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 275                                      struct hisi_sas_slot *slot)
 276 {
 277         hisi_hba->hw->prep_abort(hisi_hba, slot);
 278 }
 279
 280 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 281                                struct sas_task *task, int n_elem)
 282 {
 283         struct device *dev = hisi_hba->dev;
 284
 285         if (!sas_protocol_ata(task->task_proto) && n_elem) {
 286                 if (task->num_scatter) {
 287                         dma_unmap_sg(dev, task->scatter, task->num_scatter,
 288                                      task->data_dir);
 289                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 290                         dma_unmap_sg(dev, &task->smp_task.smp_req,
 291                                      1, DMA_TO_DEVICE);
 292                 }
 293         }
 294 }
 295
 296 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 297                             struct sas_task *task, int *n_elem)
 298 {
 299         struct device *dev = hisi_hba->dev;
 300         int rc;
 301
 302         if (sas_protocol_ata(task->task_proto)) {
 303                 *n_elem = task->num_scatter;
 304         } else {
 305                 unsigned int req_len;
 306
 307                 if (task->num_scatter) {
 308                         *n_elem = dma_map_sg(dev, task->scatter,
 309                                              task->num_scatter, task->data_dir);
 310                         if (!*n_elem) {
 311                                 rc = -ENOMEM;
 312                                 goto prep_out;
 313                         }
 314                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 315                         *n_elem = dma_map_sg(dev, &task->smp_task.smp_req,
 316                                              1, DMA_TO_DEVICE);
 317                         if (!*n_elem) {
 318                                 rc = -ENOMEM;
 319                                 goto prep_out;
 320                         }
 321                         req_len = sg_dma_len(&task->smp_task.smp_req);
 322                         if (req_len & 0x3) {
 323                                 rc = -EINVAL;
 324                                 goto err_out_dma_unmap;
 325                         }
 326                 }
 327         }
 328
 329         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 330                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 331                         *n_elem);
 332                 rc = -EINVAL;
 333                 goto err_out_dma_unmap;
 334         }
 335         return 0;
 336
 337 err_out_dma_unmap:
 338         /* It would be better to call dma_unmap_sg() here, but it's messy */
 339         hisi_sas_dma_unmap(hisi_hba, task, *n_elem);
 340 prep_out:
 341         return rc;
 342 }
 343
 344 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 345                                    struct sas_task *task, int n_elem_dif)
 346 {
 347         struct device *dev = hisi_hba->dev;
 348
 349         if (n_elem_dif) {
 350                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 351                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 352
 353                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 354                              scsi_prot_sg_count(scsi_cmnd),
 355                              task->data_dir);
 356         }
 357 }
 358
 359 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 360                                 int *n_elem_dif, struct sas_task *task)
 361 {
 362         struct device *dev = hisi_hba->dev;
 363         struct sas_ssp_task *ssp_task;
 364         struct scsi_cmnd *scsi_cmnd;
 365         int rc;
 366
 367         if (task->num_scatter) {
 368                 ssp_task = &task->ssp_task;
 369                 scsi_cmnd = ssp_task->cmd;
 370
 371                 if (scsi_prot_sg_count(scsi_cmnd)) {
 372                         *n_elem_dif = dma_map_sg(dev,
 373                                                  scsi_prot_sglist(scsi_cmnd),
 374                                                  scsi_prot_sg_count(scsi_cmnd),
 375                                                  task->data_dir);
 376
 377                         if (!*n_elem_dif)
 378                                 return -ENOMEM;
 379
 380                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 381                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 382                                         *n_elem_dif);
 383                                 rc = -EINVAL;
 384                                 goto err_out_dif_dma_unmap;
 385                         }
 386                 }
 387         }
 388
 389         return 0;
 390
 391 err_out_dif_dma_unmap:
 392         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 393                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 394         return rc;
 395 }
 396
 397 static
 398 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
 399                            struct hisi_sas_slot *slot,
 400                            struct hisi_sas_dq *dq,
 401                            struct hisi_sas_device *sas_dev)
 402 {
 403         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 404         int dlvry_queue_slot, dlvry_queue;
 405         struct sas_task *task = slot->task;
 406         int wr_q_index;
 407
 408         spin_lock(&dq->lock);
 409         wr_q_index = dq->wr_point;
 410         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 411         list_add_tail(&slot->delivery, &dq->list);
 412         spin_unlock(&dq->lock);
 413         spin_lock(&sas_dev->lock);
 414         list_add_tail(&slot->entry, &sas_dev->list);
 415         spin_unlock(&sas_dev->lock);
 416
 417         dlvry_queue = dq->id;
 418         dlvry_queue_slot = wr_q_index;
 419
 420         slot->device_id = sas_dev->device_id;
 421         slot->dlvry_queue = dlvry_queue;
 422         slot->dlvry_queue_slot = dlvry_queue_slot;
 423         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 424         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 425
 426         task->lldd_task = slot;
 427
 428         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 429         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 430         memset(hisi_sas_status_buf_addr_mem(slot), 0,
 431                sizeof(struct hisi_sas_err_record));
 432
 433         switch (task->task_proto) {
 434         case SAS_PROTOCOL_SMP:
 435                 hisi_sas_task_prep_smp(hisi_hba, slot);
 436                 break;
 437         case SAS_PROTOCOL_SSP:
 438                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 439                 break;
 440         case SAS_PROTOCOL_SATA:
 441         case SAS_PROTOCOL_STP:
 442         case SAS_PROTOCOL_STP_ALL:
 443                 hisi_sas_task_prep_ata(hisi_hba, slot);
 444                 break;
 445         case SAS_PROTOCOL_INTERNAL_ABORT:
 446                 hisi_sas_task_prep_abort(hisi_hba, slot);
 447                 break;
 448         default:
 449                 return;
 450         }
 451
 452         /* Make slot memories observable before marking as ready */
 453         smp_wmb();
 454         WRITE_ONCE(slot->ready, 1);
 455
 456         spin_lock(&dq->lock);
 457         hisi_hba->hw->start_delivery(dq);
 458         spin_unlock(&dq->lock);
 459 }
 460
 461 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 462 {
 463         int n_elem = 0, n_elem_dif = 0;
 464         struct domain_device *device = task->dev;
 465         struct asd_sas_port *sas_port = device->port;
 466         struct hisi_sas_device *sas_dev = device->lldd_dev;
 467         bool internal_abort = sas_is_internal_abort(task);
 468         struct hisi_sas_dq *dq = NULL;
 469         struct hisi_sas_port *port;
 470         struct hisi_hba *hisi_hba;
 471         struct hisi_sas_slot *slot;
 472         struct request *rq = NULL;
 473         struct device *dev;
 474         int rc;
 475
 476         if (!sas_port) {
 477                 struct task_status_struct *ts = &task->task_status;
 478
 479                 ts->resp = SAS_TASK_UNDELIVERED;
 480                 ts->stat = SAS_PHY_DOWN;
 481                 /*
 482                  * libsas will use dev->port, should
 483                  * not call task_done for sata
 484                  */
 485                 if (device->dev_type != SAS_SATA_DEV && !internal_abort)
 486                         task->task_done(task);
 487                 return -ECOMM;
 488         }
 489
 490         hisi_hba = dev_to_hisi_hba(device);
 491         dev = hisi_hba->dev;
 492
 493         switch (task->task_proto) {
 494         case SAS_PROTOCOL_SSP:
 495         case SAS_PROTOCOL_SMP:
 496         case SAS_PROTOCOL_SATA:
 497         case SAS_PROTOCOL_STP:
 498         case SAS_PROTOCOL_STP_ALL:
 499                 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 500                         if (!gfpflags_allow_blocking(gfp_flags))
 501                                 return -EINVAL;
 502
 503                         down(&hisi_hba->sem);
 504                         up(&hisi_hba->sem);
 505                 }
 506
 507                 if (DEV_IS_GONE(sas_dev)) {
 508                         if (sas_dev)
 509                                 dev_info(dev, "task prep: device %d not ready\n",
 510                                          sas_dev->device_id);
 511                         else
 512                                 dev_info(dev, "task prep: device %016llx not ready\n",
 513                                          SAS_ADDR(device->sas_addr));
 514
 515                         return -ECOMM;
 516                 }
 517
 518                 port = to_hisi_sas_port(sas_port);
 519                 if (!port->port_attached) {
 520                         dev_info(dev, "task prep: %s port%d not attach device\n",
 521                                  dev_is_sata(device) ? "SATA/STP" : "SAS",
 522                                  device->port->id);
 523
 524                                 return -ECOMM;
 525                 }
 526
 527                 rq = sas_task_find_rq(task);
 528                 if (rq) {
 529                         unsigned int dq_index;
 530                         u32 blk_tag;
 531
 532                         blk_tag = blk_mq_unique_tag(rq);
 533                         dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 534                         dq = &hisi_hba->dq[dq_index];
 535                 } else {
 536                         int queue;
 537
 538                         if (hisi_hba->iopoll_q_cnt) {
 539                                 /*
 540                                  * Use interrupt queue (queue 0) to deliver and complete
 541                                  * internal IOs of libsas or libata when there is at least
 542                                  * one iopoll queue
 543                                  */
 544                                 queue = 0;
 545                         } else {
 546                                 struct Scsi_Host *shost = hisi_hba->shost;
 547                                 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 548
 549                                 queue = qmap->mq_map[raw_smp_processor_id()];
 550                         }
 551                         dq = &hisi_hba->dq[queue];
 552                 }
 553                 break;
 554         case SAS_PROTOCOL_INTERNAL_ABORT:
 555                 if (!hisi_hba->hw->prep_abort)
 556                         return TMF_RESP_FUNC_FAILED;
 557
 558                 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
 559                         return -EIO;
 560
 561                 hisi_hba = dev_to_hisi_hba(device);
 562
 563                 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
 564                         return -EINVAL;
 565
 566                 port = to_hisi_sas_port(sas_port);
 567                 dq = &hisi_hba->dq[task->abort_task.qid];
 568                 break;
 569         default:
 570                 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
 571                         task->task_proto);
 572                 return -EINVAL;
 573         }
 574
 575         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem);
 576         if (rc < 0)
 577                 goto prep_out;
 578
 579         if (!sas_protocol_ata(task->task_proto)) {
 580                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 581                 if (rc < 0)
 582                         goto err_out_dma_unmap;
 583         }
 584
 585         if (!internal_abort && hisi_hba->hw->slot_index_alloc)
 586                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 587         else
 588                 rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
 589
 590         if (rc < 0)
 591                 goto err_out_dif_dma_unmap;
 592
 593         slot = &hisi_hba->slot_info[rc];
 594         slot->n_elem = n_elem;
 595         slot->n_elem_dif = n_elem_dif;
 596         slot->task = task;
 597         slot->port = port;
 598
 599         slot->tmf = task->tmf;
 600         slot->is_internal = !!task->tmf || internal_abort;
 601
 602         /* protect task_prep and start_delivery sequence */
 603         hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev);
 604
 605         return 0;
 606
 607 err_out_dif_dma_unmap:
 608         if (!sas_protocol_ata(task->task_proto))
 609                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 610 err_out_dma_unmap:
 611         hisi_sas_dma_unmap(hisi_hba, task, n_elem);
 612 prep_out:
 613         dev_err(dev, "task exec: failed[%d]!\n", rc);
 614         return rc;
 615 }
 616
 617 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
 618                                  gfp_t gfp_flags)
 619 {
 620         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 621         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 622
 623         if (!phy->phy_attached)
 624                 return;
 625
 626         sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 627
 628         if (sas_phy->phy) {
 629                 struct sas_phy *sphy = sas_phy->phy;
 630
 631                 sphy->negotiated_linkrate = sas_phy->linkrate;
 632                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 633                 sphy->maximum_linkrate_hw =
 634                         hisi_hba->hw->phy_get_max_linkrate();
 635                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 636                         sphy->minimum_linkrate = phy->minimum_linkrate;
 637
 638                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 639                         sphy->maximum_linkrate = phy->maximum_linkrate;
 640         }
 641
 642         if (phy->phy_type & PORT_TYPE_SAS) {
 643                 struct sas_identify_frame *id;
 644
 645                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 646                 id->dev_type = phy->identify.device_type;
 647                 id->initiator_bits = SAS_PROTOCOL_ALL;
 648                 id->target_bits = phy->identify.target_port_protocols;
 649         } else if (phy->phy_type & PORT_TYPE_SATA) {
 650                 /* Nothing */
 651         }
 652
 653         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 654         sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 655 }
 656
 657 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 658 {
 659         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 660         struct hisi_sas_device *sas_dev = NULL;
 661         int last = hisi_hba->last_dev_id;
 662         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 663         int i;
 664
 665         spin_lock(&hisi_hba->lock);
 666         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 667                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 668                         int queue = i % hisi_hba->queue_count;
 669                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 670
 671                         hisi_hba->devices[i].device_id = i;
 672                         sas_dev = &hisi_hba->devices[i];
 673                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 674                         sas_dev->dev_type = device->dev_type;
 675                         sas_dev->hisi_hba = hisi_hba;
 676                         sas_dev->sas_device = device;
 677                         sas_dev->dq = dq;
 678                         spin_lock_init(&sas_dev->lock);
 679                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 680                         break;
 681                 }
 682                 i++;
 683         }
 684         hisi_hba->last_dev_id = i;
 685         spin_unlock(&hisi_hba->lock);
 686
 687         return sas_dev;
 688 }
 689
 690 static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq)
 691 {
 692         /* make sure CQ entries being processed are processed to completion */
 693         spin_lock(&cq->poll_lock);
 694         spin_unlock(&cq->poll_lock);
 695 }
 696
 697 static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq)
 698 {
 699         struct hisi_hba *hisi_hba = cq->hisi_hba;
 700
 701         if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt)
 702                 return false;
 703         return true;
 704 }
 705
 706 static void hisi_sas_sync_cq(struct hisi_sas_cq *cq)
 707 {
 708         if (hisi_sas_queue_is_poll(cq))
 709                 hisi_sas_sync_poll_cq(cq);
 710         else
 711                 synchronize_irq(cq->irq_no);
 712 }
 713
 714 void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba)
 715 {
 716         int i;
 717
 718         for (i = 0; i < hisi_hba->queue_count; i++) {
 719                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
 720
 721                 if (hisi_sas_queue_is_poll(cq))
 722                         hisi_sas_sync_poll_cq(cq);
 723         }
 724 }
 725 EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs);
 726
 727 void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba)
 728 {
 729         int i;
 730
 731         for (i = 0; i < hisi_hba->queue_count; i++) {
 732                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
 733
 734                 hisi_sas_sync_cq(cq);
 735         }
 736 }
 737 EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs);
 738
 739 static void hisi_sas_tmf_aborted(struct sas_task *task)
 740 {
 741         struct hisi_sas_slot *slot = task->lldd_task;
 742         struct domain_device *device = task->dev;
 743         struct hisi_sas_device *sas_dev = device->lldd_dev;
 744         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 745
 746         if (slot) {
 747                 struct hisi_sas_cq *cq =
 748                            &hisi_hba->cq[slot->dlvry_queue];
 749                 /*
 750                  * sync irq or poll queue to avoid free'ing task
 751                  * before using task in IO completion
 752                  */
 753                 hisi_sas_sync_cq(cq);
 754                 slot->task = NULL;
 755         }
 756 }
 757
 758 #define HISI_SAS_DISK_RECOVER_CNT 3
 759 static int hisi_sas_init_device(struct domain_device *device)
 760 {
 761         int rc = TMF_RESP_FUNC_COMPLETE;
 762         struct scsi_lun lun;
 763         int retry = HISI_SAS_DISK_RECOVER_CNT;
 764         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 765
 766         switch (device->dev_type) {
 767         case SAS_END_DEVICE:
 768                 int_to_scsilun(0, &lun);
 769
 770                 while (retry-- > 0) {
 771                         rc = sas_abort_task_set(device, lun.scsi_lun);
 772                         if (rc == TMF_RESP_FUNC_COMPLETE) {
 773                                 hisi_sas_release_task(hisi_hba, device);
 774                                 break;
 775                         }
 776                 }
 777                 break;
 778         case SAS_SATA_DEV:
 779         case SAS_SATA_PM:
 780         case SAS_SATA_PM_PORT:
 781         case SAS_SATA_PENDING:
 782                 /*
 783                  * If an expander is swapped when a SATA disk is attached then
 784                  * we should issue a hard reset to clear previous affiliation
 785                  * of STP target port, see SPL (chapter 6.19.4).
 786                  *
 787                  * However we don't need to issue a hard reset here for these
 788                  * reasons:
 789                  * a. When probing the device, libsas/libata already issues a
 790                  * hard reset in sas_probe_sata() -> ata_port_probe().
 791                  * Note that in hisi_sas_debug_I_T_nexus_reset() we take care
 792                  * to issue a hard reset by checking the dev status (== INIT).
 793                  * b. When resetting the controller, this is simply unnecessary.
 794                  */
 795                 while (retry-- > 0) {
 796                         rc = hisi_sas_softreset_ata_disk(device);
 797                         if (!rc)
 798                                 break;
 799                 }
 800                 break;
 801         default:
 802                 break;
 803         }
 804
 805         return rc;
 806 }
 807
 808 int hisi_sas_slave_alloc(struct scsi_device *sdev)
 809 {
 810         struct domain_device *ddev = sdev_to_domain_dev(sdev);
 811         struct hisi_sas_device *sas_dev = ddev->lldd_dev;
 812         int rc;
 813
 814         rc = sas_slave_alloc(sdev);
 815         if (rc)
 816                 return rc;
 817
 818         rc = hisi_sas_init_device(ddev);
 819         if (rc)
 820                 return rc;
 821         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 822         return 0;
 823 }
 824 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
 825
 826 static int hisi_sas_dev_found(struct domain_device *device)
 827 {
 828         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 829         struct domain_device *parent_dev = device->parent;
 830         struct hisi_sas_device *sas_dev;
 831         struct device *dev = hisi_hba->dev;
 832         int rc;
 833
 834         if (hisi_hba->hw->alloc_dev)
 835                 sas_dev = hisi_hba->hw->alloc_dev(device);
 836         else
 837                 sas_dev = hisi_sas_alloc_dev(device);
 838         if (!sas_dev) {
 839                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 840                         HISI_SAS_MAX_DEVICES);
 841                 return -EINVAL;
 842         }
 843
 844         device->lldd_dev = sas_dev;
 845         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 846
 847         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 848                 int phy_no;
 849
 850                 phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device);
 851                 if (phy_no < 0) {
 852                         dev_info(dev, "dev found: no attached "
 853                                  "dev:%016llx at ex:%016llx\n",
 854                                  SAS_ADDR(device->sas_addr),
 855                                  SAS_ADDR(parent_dev->sas_addr));
 856                         rc = phy_no;
 857                         goto err_out;
 858                 }
 859         }
 860
 861         dev_info(dev, "dev[%d:%x] found\n",
 862                 sas_dev->device_id, sas_dev->dev_type);
 863
 864         return 0;
 865
 866 err_out:
 867         hisi_sas_dev_gone(device);
 868         return rc;
 869 }
 870
 871 int hisi_sas_slave_configure(struct scsi_device *sdev)
 872 {
 873         struct domain_device *dev = sdev_to_domain_dev(sdev);
 874         int ret = sas_slave_configure(sdev);
 875
 876         if (ret)
 877                 return ret;
 878         if (!dev_is_sata(dev))
 879                 sas_change_queue_depth(sdev, 64);
 880
 881         return 0;
 882 }
 883 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 884
 885 void hisi_sas_scan_start(struct Scsi_Host *shost)
 886 {
 887         struct hisi_hba *hisi_hba = shost_priv(shost);
 888
 889         hisi_hba->hw->phys_init(hisi_hba);
 890 }
 891 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 892
 893 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 894 {
 895         struct hisi_hba *hisi_hba = shost_priv(shost);
 896         struct sas_ha_struct *sha = &hisi_hba->sha;
 897
 898         /* Wait for PHY up interrupt to occur */
 899         if (time < HZ)
 900                 return 0;
 901
 902         sas_drain_work(sha);
 903         return 1;
 904 }
 905 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 906
 907 static void hisi_sas_phyup_work_common(struct work_struct *work,
 908                 enum hisi_sas_phy_event event)
 909 {
 910         struct hisi_sas_phy *phy =
 911                 container_of(work, typeof(*phy), works[event]);
 912         struct hisi_hba *hisi_hba = phy->hisi_hba;
 913         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 914         int phy_no = sas_phy->id;
 915
 916         phy->wait_phyup_cnt = 0;
 917         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 918                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 919         hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 920 }
 921
 922 static void hisi_sas_phyup_work(struct work_struct *work)
 923 {
 924         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
 925 }
 926
 927 static void hisi_sas_linkreset_work(struct work_struct *work)
 928 {
 929         struct hisi_sas_phy *phy =
 930                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 931         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 932
 933         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 934 }
 935
 936 static void hisi_sas_phyup_pm_work(struct work_struct *work)
 937 {
 938         struct hisi_sas_phy *phy =
 939                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
 940         struct hisi_hba *hisi_hba = phy->hisi_hba;
 941         struct device *dev = hisi_hba->dev;
 942
 943         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
 944         pm_runtime_put_sync(dev);
 945 }
 946
 947 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 948         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 949         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 950         [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
 951 };
 952
 953 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 954                                 enum hisi_sas_phy_event event)
 955 {
 956         struct hisi_hba *hisi_hba = phy->hisi_hba;
 957
 958         if (WARN_ON(event >= HISI_PHYES_NUM))
 959                 return false;
 960
 961         return queue_work(hisi_hba->wq, &phy->works[event]);
 962 }
 963 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 964
 965 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 966 {
 967         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 968         struct hisi_hba *hisi_hba = phy->hisi_hba;
 969         struct device *dev = hisi_hba->dev;
 970         int phy_no = phy->sas_phy.id;
 971
 972         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 973         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 974 }
 975
 976 #define HISI_SAS_WAIT_PHYUP_RETRIES     10
 977
 978 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 979 {
 980         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 981         struct device *dev = hisi_hba->dev;
 982         unsigned long flags;
 983
 984         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 985         spin_lock_irqsave(&phy->lock, flags);
 986         if (phy->phy_attached) {
 987                 spin_unlock_irqrestore(&phy->lock, flags);
 988                 return;
 989         }
 990
 991         if (!timer_pending(&phy->timer)) {
 992                 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
 993                         phy->wait_phyup_cnt++;
 994                         phy->timer.expires = jiffies +
 995                                              HISI_SAS_WAIT_PHYUP_TIMEOUT;
 996                         add_timer(&phy->timer);
 997                         spin_unlock_irqrestore(&phy->lock, flags);
 998                         return;
 999                 }
1000
1001                 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1002                          phy_no, phy->wait_phyup_cnt);
1003                 phy->wait_phyup_cnt = 0;
1004         }
1005         spin_unlock_irqrestore(&phy->lock, flags);
1006 }
1007
1008 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1009
1010 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1011 {
1012         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1013         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1014         int i;
1015
1016         phy->hisi_hba = hisi_hba;
1017         phy->port = NULL;
1018         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1019         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1020         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1021         sas_phy->iproto = SAS_PROTOCOL_ALL;
1022         sas_phy->tproto = 0;
1023         sas_phy->role = PHY_ROLE_INITIATOR;
1024         sas_phy->oob_mode = OOB_NOT_CONNECTED;
1025         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1026         sas_phy->id = phy_no;
1027         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1028         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1029         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1030         sas_phy->lldd_phy = phy;
1031
1032         for (i = 0; i < HISI_PHYES_NUM; i++)
1033                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1034
1035         spin_lock_init(&phy->lock);
1036
1037         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1038 }
1039
1040 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
1041 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1042 {
1043         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1044         struct asd_sas_phy *aphy = &phy->sas_phy;
1045         struct sas_phy *sphy = aphy->phy;
1046         unsigned long flags;
1047
1048         spin_lock_irqsave(&phy->lock, flags);
1049
1050         if (enable) {
1051                 /* We may have been enabled already; if so, don't touch */
1052                 if (!phy->enable)
1053                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1054                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1055         } else {
1056                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1057                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1058         }
1059         phy->enable = enable;
1060         spin_unlock_irqrestore(&phy->lock, flags);
1061 }
1062 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1063
1064 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1065 {
1066         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1067         struct asd_sas_port *sas_port = sas_phy->port;
1068         struct hisi_sas_port *port;
1069
1070         if (!sas_port)
1071                 return;
1072
1073         port = to_hisi_sas_port(sas_port);
1074         port->port_attached = 1;
1075         port->id = phy->port_id;
1076         phy->port = port;
1077         sas_port->lldd_port = port;
1078 }
1079
1080 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1081                                      struct hisi_sas_slot *slot, bool need_lock)
1082 {
1083         if (task) {
1084                 unsigned long flags;
1085                 struct task_status_struct *ts;
1086
1087                 ts = &task->task_status;
1088
1089                 ts->resp = SAS_TASK_COMPLETE;
1090                 ts->stat = SAS_ABORTED_TASK;
1091                 spin_lock_irqsave(&task->task_state_lock, flags);
1092                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1093                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1094                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1095                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1096         }
1097
1098         hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1099 }
1100
1101 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1102                         struct domain_device *device)
1103 {
1104         struct hisi_sas_slot *slot, *slot2;
1105         struct hisi_sas_device *sas_dev = device->lldd_dev;
1106
1107         spin_lock(&sas_dev->lock);
1108         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1109                 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1110
1111         spin_unlock(&sas_dev->lock);
1112 }
1113
1114 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1115 {
1116         struct hisi_sas_device *sas_dev;
1117         struct domain_device *device;
1118         int i;
1119
1120         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1121                 sas_dev = &hisi_hba->devices[i];
1122                 device = sas_dev->sas_device;
1123
1124                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1125                     !device)
1126                         continue;
1127
1128                 hisi_sas_release_task(hisi_hba, device);
1129         }
1130 }
1131 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1132
1133 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1134                                 struct domain_device *device)
1135 {
1136         if (hisi_hba->hw->dereg_device)
1137                 hisi_hba->hw->dereg_device(hisi_hba, device);
1138 }
1139
1140 static int
1141 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1142                                  bool rst_ha_timeout)
1143 {
1144         struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1145         struct domain_device *device = sas_dev->sas_device;
1146         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1147         int i, rc;
1148
1149         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1150                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1151                 const struct cpumask *mask = cq->irq_mask;
1152
1153                 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1154                         continue;
1155                 rc = sas_execute_internal_abort_dev(device, i, &data);
1156                 if (rc)
1157                         return rc;
1158         }
1159
1160         return 0;
1161 }
1162
1163 static void hisi_sas_dev_gone(struct domain_device *device)
1164 {
1165         struct hisi_sas_device *sas_dev = device->lldd_dev;
1166         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1167         struct device *dev = hisi_hba->dev;
1168         int ret = 0;
1169
1170         dev_info(dev, "dev[%d:%x] is gone\n",
1171                  sas_dev->device_id, sas_dev->dev_type);
1172
1173         down(&hisi_hba->sem);
1174         if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1175                 hisi_sas_internal_task_abort_dev(sas_dev, true);
1176
1177                 hisi_sas_dereg_device(hisi_hba, device);
1178
1179                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1180                 device->lldd_dev = NULL;
1181         }
1182
1183         if (hisi_hba->hw->free_device)
1184                 hisi_hba->hw->free_device(sas_dev);
1185
1186         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1187         if (!ret)
1188                 sas_dev->dev_type = SAS_PHY_UNUSED;
1189         sas_dev->sas_device = NULL;
1190         up(&hisi_hba->sem);
1191 }
1192
1193 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1194                         struct sas_phy_linkrates *r)
1195 {
1196         struct sas_phy_linkrates _r;
1197
1198         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1199         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1200         enum sas_linkrate min, max;
1201
1202         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1203                 return -EINVAL;
1204
1205         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1206                 max = sas_phy->phy->maximum_linkrate;
1207                 min = r->minimum_linkrate;
1208         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1209                 max = r->maximum_linkrate;
1210                 min = sas_phy->phy->minimum_linkrate;
1211         } else
1212                 return -EINVAL;
1213
1214         _r.maximum_linkrate = max;
1215         _r.minimum_linkrate = min;
1216
1217         sas_phy->phy->maximum_linkrate = max;
1218         sas_phy->phy->minimum_linkrate = min;
1219
1220         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1221         msleep(100);
1222         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1223         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1224
1225         return 0;
1226 }
1227
1228 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1229                                 void *funcdata)
1230 {
1231         struct hisi_sas_phy *phy = container_of(sas_phy,
1232                         struct hisi_sas_phy, sas_phy);
1233         struct sas_ha_struct *sas_ha = sas_phy->ha;
1234         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1235         struct device *dev = hisi_hba->dev;
1236         DECLARE_COMPLETION_ONSTACK(completion);
1237         int phy_no = sas_phy->id;
1238         u8 sts = phy->phy_attached;
1239         int ret = 0;
1240
1241         down(&hisi_hba->sem);
1242         phy->reset_completion = &completion;
1243
1244         switch (func) {
1245         case PHY_FUNC_HARD_RESET:
1246                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1247                 break;
1248
1249         case PHY_FUNC_LINK_RESET:
1250                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1251                 msleep(100);
1252                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1253                 break;
1254
1255         case PHY_FUNC_DISABLE:
1256                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1257                 goto out;
1258
1259         case PHY_FUNC_SET_LINK_RATE:
1260                 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1261                 break;
1262
1263         case PHY_FUNC_GET_EVENTS:
1264                 if (hisi_hba->hw->get_events) {
1265                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1266                         goto out;
1267                 }
1268                 fallthrough;
1269         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1270         default:
1271                 ret = -EOPNOTSUPP;
1272                 goto out;
1273         }
1274
1275         if (sts && !wait_for_completion_timeout(&completion,
1276                 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1277                 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1278                          phy_no, func);
1279                 if (phy->in_reset)
1280                         ret = -ETIMEDOUT;
1281         }
1282
1283 out:
1284         phy->reset_completion = NULL;
1285
1286         up(&hisi_hba->sem);
1287         return ret;
1288 }
1289
1290 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1291                 bool reset, int pmp, u8 *fis)
1292 {
1293         struct ata_taskfile tf;
1294
1295         ata_tf_init(dev, &tf);
1296         if (reset)
1297                 tf.ctl |= ATA_SRST;
1298         else
1299                 tf.ctl &= ~ATA_SRST;
1300         tf.command = ATA_CMD_DEV_RESET;
1301         ata_tf_to_fis(&tf, pmp, 0, fis);
1302 }
1303
1304 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1305 {
1306         u8 fis[20] = {0};
1307         struct ata_port *ap = device->sata_dev.ap;
1308         struct ata_link *link;
1309         int rc = TMF_RESP_FUNC_FAILED;
1310         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1311         struct device *dev = hisi_hba->dev;
1312
1313         ata_for_each_link(link, ap, EDGE) {
1314                 int pmp = sata_srst_pmp(link);
1315
1316                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1317                 rc = sas_execute_ata_cmd(device, fis, -1);
1318                 if (rc != TMF_RESP_FUNC_COMPLETE)
1319                         break;
1320         }
1321
1322         if (rc == TMF_RESP_FUNC_COMPLETE) {
1323                 ata_for_each_link(link, ap, EDGE) {
1324                         int pmp = sata_srst_pmp(link);
1325
1326                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1327                         rc = sas_execute_ata_cmd(device, fis, -1);
1328                         if (rc != TMF_RESP_FUNC_COMPLETE)
1329                                 dev_err(dev, "ata disk %016llx de-reset failed\n",
1330                                         SAS_ADDR(device->sas_addr));
1331                 }
1332         } else {
1333                 dev_err(dev, "ata disk %016llx reset failed\n",
1334                         SAS_ADDR(device->sas_addr));
1335         }
1336
1337         if (rc == TMF_RESP_FUNC_COMPLETE)
1338                 hisi_sas_release_task(hisi_hba, device);
1339
1340         return rc;
1341 }
1342
1343 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1344 {
1345         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1346         int i;
1347
1348         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1349                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1350                 struct domain_device *device = sas_dev->sas_device;
1351                 struct asd_sas_port *sas_port;
1352                 struct hisi_sas_port *port;
1353                 struct hisi_sas_phy *phy = NULL;
1354                 struct asd_sas_phy *sas_phy;
1355
1356                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1357                                 || !device || !device->port)
1358                         continue;
1359
1360                 sas_port = device->port;
1361                 port = to_hisi_sas_port(sas_port);
1362
1363                 spin_lock(&sas_port->phy_list_lock);
1364                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1365                         if (state & BIT(sas_phy->id)) {
1366                                 phy = sas_phy->lldd_phy;
1367                                 break;
1368                         }
1369                 spin_unlock(&sas_port->phy_list_lock);
1370
1371                 if (phy) {
1372                         port->id = phy->port_id;
1373
1374                         /* Update linkrate of directly attached device. */
1375                         if (!device->parent)
1376                                 device->linkrate = phy->sas_phy.linkrate;
1377
1378                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1379                 } else if (!port->port_attached)
1380                         port->id = 0xff;
1381         }
1382 }
1383
1384 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1385 {
1386         struct asd_sas_port *_sas_port = NULL;
1387         int phy_no;
1388
1389         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1390                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1391                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1392                 struct asd_sas_port *sas_port = sas_phy->port;
1393                 bool do_port_check = _sas_port != sas_port;
1394
1395                 if (!sas_phy->phy->enabled)
1396                         continue;
1397
1398                 /* Report PHY state change to libsas */
1399                 if (state & BIT(phy_no)) {
1400                         if (do_port_check && sas_port && sas_port->port_dev) {
1401                                 struct domain_device *dev = sas_port->port_dev;
1402
1403                                 _sas_port = sas_port;
1404
1405                                 if (dev_is_expander(dev->dev_type))
1406                                         sas_notify_port_event(sas_phy,
1407                                                         PORTE_BROADCAST_RCVD,
1408                                                         GFP_KERNEL);
1409                         }
1410                 } else {
1411                         hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1412                 }
1413         }
1414 }
1415
1416 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1417 {
1418         struct hisi_sas_device *sas_dev;
1419         struct domain_device *device;
1420         int i;
1421
1422         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1423                 sas_dev = &hisi_hba->devices[i];
1424                 device = sas_dev->sas_device;
1425
1426                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1427                         continue;
1428
1429                 hisi_sas_init_device(device);
1430         }
1431 }
1432
1433 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1434                                              struct asd_sas_port *sas_port,
1435                                              struct domain_device *device)
1436 {
1437         struct ata_port *ap = device->sata_dev.ap;
1438         struct device *dev = hisi_hba->dev;
1439         int rc = TMF_RESP_FUNC_FAILED;
1440         struct ata_link *link;
1441         u8 fis[20] = {0};
1442         int i;
1443
1444         for (i = 0; i < hisi_hba->n_phy; i++) {
1445                 if (!(sas_port->phy_mask & BIT(i)))
1446                         continue;
1447
1448                 ata_for_each_link(link, ap, EDGE) {
1449                         int pmp = sata_srst_pmp(link);
1450
1451                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1452                         rc = sas_execute_ata_cmd(device, fis, i);
1453                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1454                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1455                                         i, rc);
1456                                 break;
1457                         }
1458                 }
1459         }
1460 }
1461
1462 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1463 {
1464         struct device *dev = hisi_hba->dev;
1465         int port_no, rc, i;
1466
1467         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1468                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1469                 struct domain_device *device = sas_dev->sas_device;
1470
1471                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1472                         continue;
1473
1474                 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1475                 if (rc < 0)
1476                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1477         }
1478
1479         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1480                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1481                 struct asd_sas_port *sas_port = &port->sas_port;
1482                 struct domain_device *port_dev = sas_port->port_dev;
1483                 struct domain_device *device;
1484
1485                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1486                         continue;
1487
1488                 /* Try to find a SATA device */
1489                 list_for_each_entry(device, &sas_port->dev_list,
1490                                     dev_list_node) {
1491                         if (dev_is_sata(device)) {
1492                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1493                                                                  sas_port,
1494                                                                  device);
1495                                 break;
1496                         }
1497                 }
1498         }
1499 }
1500
1501 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1502 {
1503         struct Scsi_Host *shost = hisi_hba->shost;
1504
1505         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1506
1507         scsi_block_requests(shost);
1508         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1509
1510         /*
1511          * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht
1512          * which is also only used for v1/v2 hw to skip it for v3 hw
1513          */
1514         if (hisi_hba->hw->sht)
1515                 del_timer_sync(&hisi_hba->timer);
1516
1517         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1518 }
1519 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1520
1521 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1522 {
1523         struct hisi_sas_phy *phy = data;
1524         struct hisi_hba *hisi_hba = phy->hisi_hba;
1525         struct device *dev = hisi_hba->dev;
1526         DECLARE_COMPLETION_ONSTACK(completion);
1527         int phy_no = phy->sas_phy.id;
1528
1529         phy->reset_completion = &completion;
1530         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1531         if (!wait_for_completion_timeout(&completion,
1532                                          HISI_SAS_WAIT_PHYUP_TIMEOUT))
1533                 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1534
1535         phy->reset_completion = NULL;
1536 }
1537
1538 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1539 {
1540         struct Scsi_Host *shost = hisi_hba->shost;
1541         ASYNC_DOMAIN_EXCLUSIVE(async);
1542         int phy_no;
1543
1544         /* Init and wait for PHYs to come up and all libsas event finished. */
1545         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1546                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1547
1548                 if (!(hisi_hba->phy_state & BIT(phy_no)))
1549                         continue;
1550
1551                 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1552                                       phy, &async);
1553         }
1554
1555         async_synchronize_full_domain(&async);
1556         hisi_sas_refresh_port_id(hisi_hba);
1557         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1558
1559         if (hisi_hba->reject_stp_links_msk)
1560                 hisi_sas_terminate_stp_reject(hisi_hba);
1561         hisi_sas_reset_init_all_devices(hisi_hba);
1562         scsi_unblock_requests(shost);
1563         clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1564         up(&hisi_hba->sem);
1565
1566         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1567 }
1568 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1569
1570 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1571 {
1572         if (!hisi_hba->hw->soft_reset)
1573                 return -ENOENT;
1574
1575         down(&hisi_hba->sem);
1576         if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1577                 up(&hisi_hba->sem);
1578                 return -EPERM;
1579         }
1580
1581         if (hisi_sas_debugfs_enable)
1582                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1583
1584         return 0;
1585 }
1586
1587 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1588 {
1589         struct device *dev = hisi_hba->dev;
1590         struct Scsi_Host *shost = hisi_hba->shost;
1591         int rc;
1592
1593         dev_info(dev, "controller resetting...\n");
1594         hisi_sas_controller_reset_prepare(hisi_hba);
1595
1596         rc = hisi_hba->hw->soft_reset(hisi_hba);
1597         if (rc) {
1598                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1599                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1600                 up(&hisi_hba->sem);
1601                 scsi_unblock_requests(shost);
1602                 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1603                 return rc;
1604         }
1605         clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1606
1607         hisi_sas_controller_reset_done(hisi_hba);
1608         dev_info(dev, "controller reset complete\n");
1609
1610         return 0;
1611 }
1612
1613 static int hisi_sas_abort_task(struct sas_task *task)
1614 {
1615         struct hisi_sas_internal_abort_data internal_abort_data = { false };
1616         struct domain_device *device = task->dev;
1617         struct hisi_sas_device *sas_dev = device->lldd_dev;
1618         struct hisi_sas_slot *slot = task->lldd_task;
1619         struct hisi_hba *hisi_hba;
1620         struct device *dev;
1621         int rc = TMF_RESP_FUNC_FAILED;
1622         unsigned long flags;
1623
1624         if (!sas_dev)
1625                 return TMF_RESP_FUNC_FAILED;
1626
1627         hisi_hba = dev_to_hisi_hba(task->dev);
1628         dev = hisi_hba->dev;
1629
1630         spin_lock_irqsave(&task->task_state_lock, flags);
1631         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1632                 struct hisi_sas_cq *cq;
1633
1634                 if (slot) {
1635                         /*
1636                          * sync irq or poll queue to avoid free'ing task
1637                          * before using task in IO completion
1638                          */
1639                         cq = &hisi_hba->cq[slot->dlvry_queue];
1640                         hisi_sas_sync_cq(cq);
1641                 }
1642                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1643                 rc = TMF_RESP_FUNC_COMPLETE;
1644                 goto out;
1645         }
1646         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1647         spin_unlock_irqrestore(&task->task_state_lock, flags);
1648
1649         if (!slot)
1650                 goto out;
1651
1652         if (task->task_proto & SAS_PROTOCOL_SSP) {
1653                 u16 tag = slot->idx;
1654                 int rc2;
1655
1656                 rc = sas_abort_task(task, tag);
1657                 rc2 = sas_execute_internal_abort_single(device, tag,
1658                                 slot->dlvry_queue, &internal_abort_data);
1659                 if (rc2 < 0) {
1660                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1661                         return TMF_RESP_FUNC_FAILED;
1662                 }
1663
1664                 /*
1665                  * If the TMF finds that the IO is not in the device and also
1666                  * the internal abort does not succeed, then it is safe to
1667                  * free the slot.
1668                  * Note: if the internal abort succeeds then the slot
1669                  * will have already been completed
1670                  */
1671                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1672                         if (task->lldd_task)
1673                                 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1674                 }
1675         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1676                 task->task_proto & SAS_PROTOCOL_STP) {
1677                 if (task->dev->dev_type == SAS_SATA_DEV) {
1678                         struct ata_queued_cmd *qc = task->uldd_task;
1679
1680                         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1681                         if (rc < 0) {
1682                                 dev_err(dev, "abort task: internal abort failed\n");
1683                                 goto out;
1684                         }
1685                         hisi_sas_dereg_device(hisi_hba, device);
1686
1687                         /*
1688                          * If an ATA internal command times out in ATA EH, it
1689                          * need to execute soft reset, so check the scsicmd
1690                          */
1691                         if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1692                             qc && qc->scsicmd) {
1693                                 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1694                                 rc = TMF_RESP_FUNC_COMPLETE;
1695                         } else {
1696                                 rc = hisi_sas_softreset_ata_disk(device);
1697                         }
1698                 }
1699         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1700                 /* SMP */
1701                 u32 tag = slot->idx;
1702                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1703
1704                 rc = sas_execute_internal_abort_single(device,
1705                                                        tag, slot->dlvry_queue,
1706                                                        &internal_abort_data);
1707                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1708                                         task->lldd_task) {
1709                         /*
1710                          * sync irq or poll queue to avoid free'ing task
1711                          * before using task in IO completion
1712                          */
1713                         hisi_sas_sync_cq(cq);
1714                         slot->task = NULL;
1715                 }
1716         }
1717
1718 out:
1719         if (rc != TMF_RESP_FUNC_COMPLETE)
1720                 dev_notice(dev, "abort task: rc=%d\n", rc);
1721         return rc;
1722 }
1723
1724 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1725 {
1726         struct hisi_sas_device *sas_dev = device->lldd_dev;
1727         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1728         struct device *dev = hisi_hba->dev;
1729         int rc;
1730
1731         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1732         if (rc < 0) {
1733                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1734                 return TMF_RESP_FUNC_FAILED;
1735         }
1736         hisi_sas_dereg_device(hisi_hba, device);
1737
1738         rc = sas_abort_task_set(device, lun);
1739         if (rc == TMF_RESP_FUNC_COMPLETE)
1740                 hisi_sas_release_task(hisi_hba, device);
1741
1742         return rc;
1743 }
1744
1745 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1746 {
1747         struct sas_phy *local_phy = sas_get_local_phy(device);
1748         struct hisi_sas_device *sas_dev = device->lldd_dev;
1749         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1750         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1751         int rc, reset_type;
1752
1753         if (!local_phy->enabled) {
1754                 sas_put_local_phy(local_phy);
1755                 return -ENODEV;
1756         }
1757
1758         if (scsi_is_sas_phy_local(local_phy)) {
1759                 struct asd_sas_phy *sas_phy =
1760                         sas_ha->sas_phy[local_phy->number];
1761                 struct hisi_sas_phy *phy =
1762                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1763                 unsigned long flags;
1764
1765                 spin_lock_irqsave(&phy->lock, flags);
1766                 phy->in_reset = 1;
1767                 spin_unlock_irqrestore(&phy->lock, flags);
1768         }
1769
1770         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1771                       !dev_is_sata(device)) ? true : false;
1772
1773         rc = sas_phy_reset(local_phy, reset_type);
1774         sas_put_local_phy(local_phy);
1775
1776         if (scsi_is_sas_phy_local(local_phy)) {
1777                 struct asd_sas_phy *sas_phy =
1778                         sas_ha->sas_phy[local_phy->number];
1779                 struct hisi_sas_phy *phy =
1780                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1781                 unsigned long flags;
1782
1783                 spin_lock_irqsave(&phy->lock, flags);
1784                 phy->in_reset = 0;
1785                 spin_unlock_irqrestore(&phy->lock, flags);
1786
1787                 /* report PHY down if timed out */
1788                 if (rc == -ETIMEDOUT)
1789                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1790                 return rc;
1791         }
1792
1793         /* Remote phy */
1794         if (rc)
1795                 return rc;
1796
1797         if (dev_is_sata(device)) {
1798                 struct ata_link *link = &device->sata_dev.ap->link;
1799
1800                 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1801                                           smp_ata_check_ready_type);
1802         } else {
1803                 msleep(2000);
1804         }
1805
1806         return rc;
1807 }
1808
1809 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1810 {
1811         struct hisi_sas_device *sas_dev = device->lldd_dev;
1812         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1813         struct device *dev = hisi_hba->dev;
1814         int rc;
1815
1816         if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1817                 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1818
1819         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1820         if (rc < 0) {
1821                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1822                 return TMF_RESP_FUNC_FAILED;
1823         }
1824         hisi_sas_dereg_device(hisi_hba, device);
1825
1826         rc = hisi_sas_debug_I_T_nexus_reset(device);
1827         if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1828                 struct sas_phy *local_phy;
1829
1830                 rc = hisi_sas_softreset_ata_disk(device);
1831                 switch (rc) {
1832                 case -ECOMM:
1833                         rc = -ENODEV;
1834                         break;
1835                 case TMF_RESP_FUNC_FAILED:
1836                 case -EMSGSIZE:
1837                 case -EIO:
1838                         local_phy = sas_get_local_phy(device);
1839                         rc = sas_phy_enable(local_phy, 0);
1840                         if (!rc) {
1841                                 local_phy->enabled = 0;
1842                                 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1843                                         SAS_ADDR(device->sas_addr), rc);
1844                                 rc = -ENODEV;
1845                         }
1846                         sas_put_local_phy(local_phy);
1847                         break;
1848                 default:
1849                         break;
1850                 }
1851         }
1852
1853         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1854                 hisi_sas_release_task(hisi_hba, device);
1855
1856         return rc;
1857 }
1858
1859 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1860 {
1861         struct hisi_sas_device *sas_dev = device->lldd_dev;
1862         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1863         struct device *dev = hisi_hba->dev;
1864         int rc = TMF_RESP_FUNC_FAILED;
1865
1866         /* Clear internal IO and then lu reset */
1867         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1868         if (rc < 0) {
1869                 dev_err(dev, "lu_reset: internal abort failed\n");
1870                 goto out;
1871         }
1872         hisi_sas_dereg_device(hisi_hba, device);
1873
1874         if (dev_is_sata(device)) {
1875                 struct sas_phy *phy;
1876
1877                 phy = sas_get_local_phy(device);
1878
1879                 rc = sas_phy_reset(phy, true);
1880
1881                 if (rc == 0)
1882                         hisi_sas_release_task(hisi_hba, device);
1883                 sas_put_local_phy(phy);
1884         } else {
1885                 rc = sas_lu_reset(device, lun);
1886                 if (rc == TMF_RESP_FUNC_COMPLETE)
1887                         hisi_sas_release_task(hisi_hba, device);
1888         }
1889 out:
1890         if (rc != TMF_RESP_FUNC_COMPLETE)
1891                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1892                              sas_dev->device_id, rc);
1893         return rc;
1894 }
1895
1896 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1897 {
1898         struct domain_device *device = data;
1899         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1900         int rc;
1901
1902         rc = hisi_sas_debug_I_T_nexus_reset(device);
1903         if (rc != TMF_RESP_FUNC_COMPLETE)
1904                 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1905                          SAS_ADDR(device->sas_addr), rc);
1906 }
1907
1908 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1909 {
1910         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1911         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1912         ASYNC_DOMAIN_EXCLUSIVE(async);
1913         int i;
1914
1915         queue_work(hisi_hba->wq, &r.work);
1916         wait_for_completion(r.completion);
1917         if (!r.done)
1918                 return TMF_RESP_FUNC_FAILED;
1919
1920         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1921                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1922                 struct domain_device *device = sas_dev->sas_device;
1923
1924                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1925                     dev_is_expander(device->dev_type))
1926                         continue;
1927
1928                 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1929                                       device, &async);
1930         }
1931
1932         async_synchronize_full_domain(&async);
1933         hisi_sas_release_tasks(hisi_hba);
1934
1935         return TMF_RESP_FUNC_COMPLETE;
1936 }
1937
1938 static int hisi_sas_query_task(struct sas_task *task)
1939 {
1940         int rc = TMF_RESP_FUNC_FAILED;
1941
1942         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1943                 struct hisi_sas_slot *slot = task->lldd_task;
1944                 u32 tag = slot->idx;
1945
1946                 rc = sas_query_task(task, tag);
1947                 switch (rc) {
1948                 /* The task is still in Lun, release it then */
1949                 case TMF_RESP_FUNC_SUCC:
1950                 /* The task is not in Lun or failed, reset the phy */
1951                 case TMF_RESP_FUNC_FAILED:
1952                 case TMF_RESP_FUNC_COMPLETE:
1953                         break;
1954                 default:
1955                         rc = TMF_RESP_FUNC_FAILED;
1956                         break;
1957                 }
1958         }
1959         return rc;
1960 }
1961
1962 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1963                                             void *data)
1964 {
1965         struct domain_device *device = task->dev;
1966         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1967         struct hisi_sas_internal_abort_data *timeout = data;
1968
1969         if (hisi_sas_debugfs_enable) {
1970                 /*
1971                  * If timeout occurs in device gone scenario, to avoid
1972                  * circular dependency like:
1973                  * hisi_sas_dev_gone() -> down() -> ... ->
1974                  * hisi_sas_internal_abort_timeout() -> down().
1975                  */
1976                 if (!timeout->rst_ha_timeout)
1977                         down(&hisi_hba->sem);
1978                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1979                 if (!timeout->rst_ha_timeout)
1980                         up(&hisi_hba->sem);
1981         }
1982
1983         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1984                 pr_err("Internal abort: timeout %016llx\n",
1985                        SAS_ADDR(device->sas_addr));
1986         } else {
1987                 struct hisi_sas_slot *slot = task->lldd_task;
1988
1989                 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1990
1991                 if (slot) {
1992                         struct hisi_sas_cq *cq =
1993                                 &hisi_hba->cq[slot->dlvry_queue];
1994                         /*
1995                          * sync irq or poll queue to avoid free'ing task
1996                          * before using task in IO completion
1997                          */
1998                         hisi_sas_sync_cq(cq);
1999                         slot->task = NULL;
2000                 }
2001
2002                 if (timeout->rst_ha_timeout) {
2003                         pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
2004                                SAS_ADDR(device->sas_addr));
2005                         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2006                 } else {
2007                         pr_err("Internal abort: timeout and not done %016llx.\n",
2008                                SAS_ADDR(device->sas_addr));
2009                 }
2010
2011                 return true;
2012         }
2013
2014         return false;
2015 }
2016
2017 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2018 {
2019         hisi_sas_port_notify_formed(sas_phy);
2020 }
2021
2022 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2023                         u8 reg_index, u8 reg_count, u8 *write_data)
2024 {
2025         struct hisi_hba *hisi_hba = sha->lldd_ha;
2026
2027         if (!hisi_hba->hw->write_gpio)
2028                 return -EOPNOTSUPP;
2029
2030         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2031                                 reg_index, reg_count, write_data);
2032 }
2033
2034 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2035 {
2036         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2037         struct sas_phy *sphy = sas_phy->phy;
2038         unsigned long flags;
2039
2040         phy->phy_attached = 0;
2041         phy->phy_type = 0;
2042         phy->port = NULL;
2043
2044         spin_lock_irqsave(&phy->lock, flags);
2045         if (phy->enable)
2046                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2047         else
2048                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2049         spin_unlock_irqrestore(&phy->lock, flags);
2050 }
2051
2052 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2053                        gfp_t gfp_flags)
2054 {
2055         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2056         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2057         struct device *dev = hisi_hba->dev;
2058
2059         if (rdy) {
2060                 /* Phy down but ready */
2061                 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2062                 hisi_sas_port_notify_formed(sas_phy);
2063         } else {
2064                 struct hisi_sas_port *port  = phy->port;
2065
2066                 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2067                     phy->in_reset) {
2068                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2069                         return;
2070                 }
2071                 /* Phy down and not ready */
2072                 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2073                 sas_phy_disconnected(sas_phy);
2074
2075                 if (port) {
2076                         if (phy->phy_type & PORT_TYPE_SAS) {
2077                                 int port_id = port->id;
2078
2079                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2080                                                                        port_id))
2081                                         port->port_attached = 0;
2082                         } else if (phy->phy_type & PORT_TYPE_SATA)
2083                                 port->port_attached = 0;
2084                 }
2085                 hisi_sas_phy_disconnected(phy);
2086         }
2087 }
2088 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2089
2090 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2091 {
2092         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2093         struct hisi_hba *hisi_hba = phy->hisi_hba;
2094
2095         if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2096                 return;
2097
2098         sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2099 }
2100 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2101
2102 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2103 {
2104         struct hisi_hba *hisi_hba = shost_priv(shost);
2105
2106         if (reset_type != SCSI_ADAPTER_RESET)
2107                 return -EOPNOTSUPP;
2108
2109         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2110
2111         return 0;
2112 }
2113 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2114
2115 struct scsi_transport_template *hisi_sas_stt;
2116 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2117
2118 static struct sas_domain_function_template hisi_sas_transport_ops = {
2119         .lldd_dev_found         = hisi_sas_dev_found,
2120         .lldd_dev_gone          = hisi_sas_dev_gone,
2121         .lldd_execute_task      = hisi_sas_queue_command,
2122         .lldd_control_phy       = hisi_sas_control_phy,
2123         .lldd_abort_task        = hisi_sas_abort_task,
2124         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2125         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2126         .lldd_lu_reset          = hisi_sas_lu_reset,
2127         .lldd_query_task        = hisi_sas_query_task,
2128         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2129         .lldd_port_formed       = hisi_sas_port_formed,
2130         .lldd_write_gpio        = hisi_sas_write_gpio,
2131         .lldd_tmf_aborted       = hisi_sas_tmf_aborted,
2132         .lldd_abort_timeout     = hisi_sas_internal_abort_timeout,
2133 };
2134
2135 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2136 {
2137         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2138         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2139
2140         for (i = 0; i < hisi_hba->queue_count; i++) {
2141                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2142                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2143                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2144
2145                 s = sizeof(struct hisi_sas_cmd_hdr);
2146                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2147                         memset(&cmd_hdr[j], 0, s);
2148
2149                 dq->wr_point = 0;
2150
2151                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2152                 memset(hisi_hba->complete_hdr[i], 0, s);
2153                 cq->rd_point = 0;
2154         }
2155
2156         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2157         memset(hisi_hba->initial_fis, 0, s);
2158
2159         s = max_command_entries * sizeof(struct hisi_sas_iost);
2160         memset(hisi_hba->iost, 0, s);
2161
2162         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2163         memset(hisi_hba->breakpoint, 0, s);
2164
2165         s = sizeof(struct hisi_sas_sata_breakpoint);
2166         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2167                 memset(&sata_breakpoint[j], 0, s);
2168 }
2169 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2170
2171 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2172 {
2173         struct device *dev = hisi_hba->dev;
2174         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2175         int max_command_entries_ru, sz_slot_buf_ru;
2176         int blk_cnt, slots_per_blk;
2177
2178         sema_init(&hisi_hba->sem, 1);
2179         spin_lock_init(&hisi_hba->lock);
2180         for (i = 0; i < hisi_hba->n_phy; i++) {
2181                 hisi_sas_phy_init(hisi_hba, i);
2182                 hisi_hba->port[i].port_attached = 0;
2183                 hisi_hba->port[i].id = -1;
2184         }
2185
2186         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2187                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2188                 hisi_hba->devices[i].device_id = i;
2189                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2190         }
2191
2192         for (i = 0; i < hisi_hba->queue_count; i++) {
2193                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2194                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2195
2196                 /* Completion queue structure */
2197                 cq->id = i;
2198                 cq->hisi_hba = hisi_hba;
2199                 spin_lock_init(&cq->poll_lock);
2200
2201                 /* Delivery queue structure */
2202                 spin_lock_init(&dq->lock);
2203                 INIT_LIST_HEAD(&dq->list);
2204                 dq->id = i;
2205                 dq->hisi_hba = hisi_hba;
2206
2207                 /* Delivery queue */
2208                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2209                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2210                                                 &hisi_hba->cmd_hdr_dma[i],
2211                                                 GFP_KERNEL);
2212                 if (!hisi_hba->cmd_hdr[i])
2213                         goto err_out;
2214
2215                 /* Completion queue */
2216                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2217                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2218                                                 &hisi_hba->complete_hdr_dma[i],
2219                                                 GFP_KERNEL);
2220                 if (!hisi_hba->complete_hdr[i])
2221                         goto err_out;
2222         }
2223
2224         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2225         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2226                                              GFP_KERNEL);
2227         if (!hisi_hba->itct)
2228                 goto err_out;
2229
2230         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2231                                            sizeof(struct hisi_sas_slot),
2232                                            GFP_KERNEL);
2233         if (!hisi_hba->slot_info)
2234                 goto err_out;
2235
2236         /* roundup to avoid overly large block size */
2237         max_command_entries_ru = roundup(max_command_entries, 64);
2238         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2239                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2240         else
2241                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2242         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2243         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2244         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2245         slots_per_blk = s / sz_slot_buf_ru;
2246
2247         for (i = 0; i < blk_cnt; i++) {
2248                 int slot_index = i * slots_per_blk;
2249                 dma_addr_t buf_dma;
2250                 void *buf;
2251
2252                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2253                                           GFP_KERNEL);
2254                 if (!buf)
2255                         goto err_out;
2256
2257                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2258                         struct hisi_sas_slot *slot;
2259
2260                         slot = &hisi_hba->slot_info[slot_index];
2261                         slot->buf = buf;
2262                         slot->buf_dma = buf_dma;
2263                         slot->idx = slot_index;
2264
2265                         buf += sz_slot_buf_ru;
2266                         buf_dma += sz_slot_buf_ru;
2267                 }
2268         }
2269
2270         s = max_command_entries * sizeof(struct hisi_sas_iost);
2271         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2272                                              GFP_KERNEL);
2273         if (!hisi_hba->iost)
2274                 goto err_out;
2275
2276         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2277         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2278                                                    &hisi_hba->breakpoint_dma,
2279                                                    GFP_KERNEL);
2280         if (!hisi_hba->breakpoint)
2281                 goto err_out;
2282
2283         s = hisi_hba->slot_index_count = max_command_entries;
2284         hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2285         if (!hisi_hba->slot_index_tags)
2286                 goto err_out;
2287
2288         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2289         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2290                                                     &hisi_hba->initial_fis_dma,
2291                                                     GFP_KERNEL);
2292         if (!hisi_hba->initial_fis)
2293                 goto err_out;
2294
2295         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2296         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2297                                         &hisi_hba->sata_breakpoint_dma,
2298                                         GFP_KERNEL);
2299         if (!hisi_hba->sata_breakpoint)
2300                 goto err_out;
2301
2302         hisi_hba->last_slot_index = 0;
2303
2304         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2305         if (!hisi_hba->wq) {
2306                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2307                 goto err_out;
2308         }
2309
2310         return 0;
2311 err_out:
2312         return -ENOMEM;
2313 }
2314 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2315
2316 void hisi_sas_free(struct hisi_hba *hisi_hba)
2317 {
2318         int i;
2319
2320         for (i = 0; i < hisi_hba->n_phy; i++) {
2321                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2322
2323                 del_timer_sync(&phy->timer);
2324         }
2325
2326         if (hisi_hba->wq)
2327                 destroy_workqueue(hisi_hba->wq);
2328 }
2329 EXPORT_SYMBOL_GPL(hisi_sas_free);
2330
2331 void hisi_sas_rst_work_handler(struct work_struct *work)
2332 {
2333         struct hisi_hba *hisi_hba =
2334                 container_of(work, struct hisi_hba, rst_work);
2335
2336         if (hisi_sas_controller_prereset(hisi_hba))
2337                 return;
2338
2339         hisi_sas_controller_reset(hisi_hba);
2340 }
2341 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2342
2343 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2344 {
2345         struct hisi_sas_rst *rst =
2346                 container_of(work, struct hisi_sas_rst, work);
2347
2348         if (hisi_sas_controller_prereset(rst->hisi_hba))
2349                 goto rst_complete;
2350
2351         if (!hisi_sas_controller_reset(rst->hisi_hba))
2352                 rst->done = true;
2353 rst_complete:
2354         complete(rst->completion);
2355 }
2356 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2357
2358 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2359 {
2360         struct device *dev = hisi_hba->dev;
2361         struct platform_device *pdev = hisi_hba->platform_dev;
2362         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2363         struct clk *refclk;
2364
2365         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2366                                           SAS_ADDR_SIZE)) {
2367                 dev_err(dev, "could not get property sas-addr\n");
2368                 return -ENOENT;
2369         }
2370
2371         if (np) {
2372                 /*
2373                  * These properties are only required for platform device-based
2374                  * controller with DT firmware.
2375                  */
2376                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2377                                         "hisilicon,sas-syscon");
2378                 if (IS_ERR(hisi_hba->ctrl)) {
2379                         dev_err(dev, "could not get syscon\n");
2380                         return -ENOENT;
2381                 }
2382
2383                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2384                                              &hisi_hba->ctrl_reset_reg)) {
2385                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2386                         return -ENOENT;
2387                 }
2388
2389                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2390                                              &hisi_hba->ctrl_reset_sts_reg)) {
2391                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2392                         return -ENOENT;
2393                 }
2394
2395                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2396                                              &hisi_hba->ctrl_clock_ena_reg)) {
2397                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2398                         return -ENOENT;
2399                 }
2400         }
2401
2402         refclk = devm_clk_get(dev, NULL);
2403         if (IS_ERR(refclk))
2404                 dev_dbg(dev, "no ref clk property\n");
2405         else
2406                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2407
2408         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2409                 dev_err(dev, "could not get property phy-count\n");
2410                 return -ENOENT;
2411         }
2412
2413         if (device_property_read_u32(dev, "queue-count",
2414                                      &hisi_hba->queue_count)) {
2415                 dev_err(dev, "could not get property queue-count\n");
2416                 return -ENOENT;
2417         }
2418
2419         return 0;
2420 }
2421 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2422
2423 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2424                                               const struct hisi_sas_hw *hw)
2425 {
2426         struct resource *res;
2427         struct Scsi_Host *shost;
2428         struct hisi_hba *hisi_hba;
2429         struct device *dev = &pdev->dev;
2430         int error;
2431
2432         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2433         if (!shost) {
2434                 dev_err(dev, "scsi host alloc failed\n");
2435                 return NULL;
2436         }
2437         hisi_hba = shost_priv(shost);
2438
2439         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2440         hisi_hba->hw = hw;
2441         hisi_hba->dev = dev;
2442         hisi_hba->platform_dev = pdev;
2443         hisi_hba->shost = shost;
2444         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2445
2446         timer_setup(&hisi_hba->timer, NULL, 0);
2447
2448         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2449                 goto err_out;
2450
2451         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2452         if (error) {
2453                 dev_err(dev, "No usable DMA addressing method\n");
2454                 goto err_out;
2455         }
2456
2457         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2458         if (IS_ERR(hisi_hba->regs))
2459                 goto err_out;
2460
2461         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2462         if (res) {
2463                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2464                 if (IS_ERR(hisi_hba->sgpio_regs))
2465                         goto err_out;
2466         }
2467
2468         if (hisi_sas_alloc(hisi_hba)) {
2469                 hisi_sas_free(hisi_hba);
2470                 goto err_out;
2471         }
2472
2473         return shost;
2474 err_out:
2475         scsi_host_put(shost);
2476         dev_err(dev, "shost alloc failed\n");
2477         return NULL;
2478 }
2479
2480 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2481 {
2482         if (hisi_hba->hw->interrupt_preinit)
2483                 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2484         return 0;
2485 }
2486
2487 int hisi_sas_probe(struct platform_device *pdev,
2488                    const struct hisi_sas_hw *hw)
2489 {
2490         struct Scsi_Host *shost;
2491         struct hisi_hba *hisi_hba;
2492         struct device *dev = &pdev->dev;
2493         struct asd_sas_phy **arr_phy;
2494         struct asd_sas_port **arr_port;
2495         struct sas_ha_struct *sha;
2496         int rc, phy_nr, port_nr, i;
2497
2498         shost = hisi_sas_shost_alloc(pdev, hw);
2499         if (!shost)
2500                 return -ENOMEM;
2501
2502         sha = SHOST_TO_SAS_HA(shost);
2503         hisi_hba = shost_priv(shost);
2504         platform_set_drvdata(pdev, sha);
2505
2506         phy_nr = port_nr = hisi_hba->n_phy;
2507
2508         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2509         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2510         if (!arr_phy || !arr_port) {
2511                 rc = -ENOMEM;
2512                 goto err_out_ha;
2513         }
2514
2515         sha->sas_phy = arr_phy;
2516         sha->sas_port = arr_port;
2517         sha->lldd_ha = hisi_hba;
2518
2519         shost->transportt = hisi_sas_stt;
2520         shost->max_id = HISI_SAS_MAX_DEVICES;
2521         shost->max_lun = ~0;
2522         shost->max_channel = 1;
2523         shost->max_cmd_len = 16;
2524         if (hisi_hba->hw->slot_index_alloc) {
2525                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2526                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2527         } else {
2528                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2529                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2530         }
2531
2532         sha->sas_ha_name = DRV_NAME;
2533         sha->dev = hisi_hba->dev;
2534         sha->sas_addr = &hisi_hba->sas_addr[0];
2535         sha->num_phys = hisi_hba->n_phy;
2536         sha->shost = hisi_hba->shost;
2537
2538         for (i = 0; i < hisi_hba->n_phy; i++) {
2539                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2540                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2541         }
2542
2543         rc = hisi_sas_interrupt_preinit(hisi_hba);
2544         if (rc)
2545                 goto err_out_ha;
2546
2547         rc = scsi_add_host(shost, &pdev->dev);
2548         if (rc)
2549                 goto err_out_ha;
2550
2551         rc = sas_register_ha(sha);
2552         if (rc)
2553                 goto err_out_register_ha;
2554
2555         rc = hisi_hba->hw->hw_init(hisi_hba);
2556         if (rc)
2557                 goto err_out_hw_init;
2558
2559         scsi_scan_host(shost);
2560
2561         return 0;
2562
2563 err_out_hw_init:
2564         sas_unregister_ha(sha);
2565 err_out_register_ha:
2566         scsi_remove_host(shost);
2567 err_out_ha:
2568         hisi_sas_free(hisi_hba);
2569         scsi_host_put(shost);
2570         return rc;
2571 }
2572 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2573
2574 void hisi_sas_remove(struct platform_device *pdev)
2575 {
2576         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2577         struct hisi_hba *hisi_hba = sha->lldd_ha;
2578         struct Scsi_Host *shost = sha->shost;
2579
2580         del_timer_sync(&hisi_hba->timer);
2581
2582         sas_unregister_ha(sha);
2583         sas_remove_host(shost);
2584
2585         hisi_sas_free(hisi_hba);
2586         scsi_host_put(shost);
2587 }
2588 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2589
2590 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2591 #define DEBUGFS_ENABLE_DEFAULT  "enabled"
2592 bool hisi_sas_debugfs_enable = true;
2593 u32 hisi_sas_debugfs_dump_count = 50;
2594 #else
2595 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2596 bool hisi_sas_debugfs_enable;
2597 u32 hisi_sas_debugfs_dump_count = 1;
2598 #endif
2599
2600 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2601 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2602 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2603                  "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2604
2605 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2606 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2607 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2608
2609 struct dentry *hisi_sas_debugfs_dir;
2610 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2611
2612 static __init int hisi_sas_init(void)
2613 {
2614         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2615         if (!hisi_sas_stt)
2616                 return -ENOMEM;
2617
2618         if (hisi_sas_debugfs_enable) {
2619                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2620                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2621                         pr_info("hisi_sas: Limiting debugfs dump count\n");
2622                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2623                 }
2624         }
2625
2626         return 0;
2627 }
2628
2629 static __exit void hisi_sas_exit(void)
2630 {
2631         sas_release_transport(hisi_sas_stt);
2632
2633         if (hisi_sas_debugfs_enable)
2634                 debugfs_remove(hisi_sas_debugfs_dir);
2635 }
2636
2637 module_init(hisi_sas_init);
2638 module_exit(hisi_sas_exit);
2639
2640 MODULE_LICENSE("GPL");
2641 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2642 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2643 MODULE_ALIAS("platform:" DRV_NAME);