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_device_configure(struct scsi_device *sdev,
 872                 struct queue_limits *lim)
 873 {
 874         struct domain_device *dev = sdev_to_domain_dev(sdev);
 875         int ret = sas_device_configure(sdev, lim);
 876
 877         if (ret)
 878                 return ret;
 879         if (!dev_is_sata(dev))
 880                 sas_change_queue_depth(sdev, 64);
 881
 882         return 0;
 883 }
 884 EXPORT_SYMBOL_GPL(hisi_sas_device_configure);
 885
 886 void hisi_sas_scan_start(struct Scsi_Host *shost)
 887 {
 888         struct hisi_hba *hisi_hba = shost_priv(shost);
 889
 890         hisi_hba->hw->phys_init(hisi_hba);
 891 }
 892 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 893
 894 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 895 {
 896         struct hisi_hba *hisi_hba = shost_priv(shost);
 897         struct sas_ha_struct *sha = &hisi_hba->sha;
 898
 899         /* Wait for PHY up interrupt to occur */
 900         if (time < HZ)
 901                 return 0;
 902
 903         sas_drain_work(sha);
 904         return 1;
 905 }
 906 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 907
 908 static void hisi_sas_phyup_work_common(struct work_struct *work,
 909                 enum hisi_sas_phy_event event)
 910 {
 911         struct hisi_sas_phy *phy =
 912                 container_of(work, typeof(*phy), works[event]);
 913         struct hisi_hba *hisi_hba = phy->hisi_hba;
 914         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 915         int phy_no = sas_phy->id;
 916
 917         phy->wait_phyup_cnt = 0;
 918         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 919                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 920         hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 921 }
 922
 923 static void hisi_sas_phyup_work(struct work_struct *work)
 924 {
 925         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
 926 }
 927
 928 static void hisi_sas_linkreset_work(struct work_struct *work)
 929 {
 930         struct hisi_sas_phy *phy =
 931                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 932         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 933
 934         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 935 }
 936
 937 static void hisi_sas_phyup_pm_work(struct work_struct *work)
 938 {
 939         struct hisi_sas_phy *phy =
 940                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
 941         struct hisi_hba *hisi_hba = phy->hisi_hba;
 942         struct device *dev = hisi_hba->dev;
 943
 944         hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
 945         pm_runtime_put_sync(dev);
 946 }
 947
 948 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 949         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 950         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 951         [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
 952 };
 953
 954 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 955                                 enum hisi_sas_phy_event event)
 956 {
 957         struct hisi_hba *hisi_hba = phy->hisi_hba;
 958
 959         if (WARN_ON(event >= HISI_PHYES_NUM))
 960                 return false;
 961
 962         return queue_work(hisi_hba->wq, &phy->works[event]);
 963 }
 964 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 965
 966 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 967 {
 968         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 969         struct hisi_hba *hisi_hba = phy->hisi_hba;
 970         struct device *dev = hisi_hba->dev;
 971         int phy_no = phy->sas_phy.id;
 972
 973         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 974         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 975 }
 976
 977 #define HISI_SAS_WAIT_PHYUP_RETRIES     10
 978
 979 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 980 {
 981         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 982         struct device *dev = hisi_hba->dev;
 983         unsigned long flags;
 984
 985         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 986         spin_lock_irqsave(&phy->lock, flags);
 987         if (phy->phy_attached) {
 988                 spin_unlock_irqrestore(&phy->lock, flags);
 989                 return;
 990         }
 991
 992         if (!timer_pending(&phy->timer)) {
 993                 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
 994                         phy->wait_phyup_cnt++;
 995                         phy->timer.expires = jiffies +
 996                                              HISI_SAS_WAIT_PHYUP_TIMEOUT;
 997                         add_timer(&phy->timer);
 998                         spin_unlock_irqrestore(&phy->lock, flags);
 999                         return;
1000                 }
1001
1002                 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1003                          phy_no, phy->wait_phyup_cnt);
1004                 phy->wait_phyup_cnt = 0;
1005         }
1006         spin_unlock_irqrestore(&phy->lock, flags);
1007 }
1008
1009 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1010
1011 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1012 {
1013         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1014         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1015         int i;
1016
1017         phy->hisi_hba = hisi_hba;
1018         phy->port = NULL;
1019         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1020         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1021         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1022         sas_phy->iproto = SAS_PROTOCOL_ALL;
1023         sas_phy->tproto = 0;
1024         sas_phy->role = PHY_ROLE_INITIATOR;
1025         sas_phy->oob_mode = OOB_NOT_CONNECTED;
1026         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1027         sas_phy->id = phy_no;
1028         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1029         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1030         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1031         sas_phy->lldd_phy = phy;
1032
1033         for (i = 0; i < HISI_PHYES_NUM; i++)
1034                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1035
1036         spin_lock_init(&phy->lock);
1037
1038         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1039 }
1040
1041 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
1042 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1043 {
1044         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1045         struct asd_sas_phy *aphy = &phy->sas_phy;
1046         struct sas_phy *sphy = aphy->phy;
1047         unsigned long flags;
1048
1049         spin_lock_irqsave(&phy->lock, flags);
1050
1051         if (enable) {
1052                 /* We may have been enabled already; if so, don't touch */
1053                 if (!phy->enable)
1054                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1055                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
1056         } else {
1057                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1058                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1059         }
1060         phy->enable = enable;
1061         spin_unlock_irqrestore(&phy->lock, flags);
1062 }
1063 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1064
1065 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1066 {
1067         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1068         struct asd_sas_port *sas_port = sas_phy->port;
1069         struct hisi_sas_port *port;
1070
1071         if (!sas_port)
1072                 return;
1073
1074         port = to_hisi_sas_port(sas_port);
1075         port->port_attached = 1;
1076         port->id = phy->port_id;
1077         phy->port = port;
1078         sas_port->lldd_port = port;
1079 }
1080
1081 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1082                                      struct hisi_sas_slot *slot, bool need_lock)
1083 {
1084         if (task) {
1085                 unsigned long flags;
1086                 struct task_status_struct *ts;
1087
1088                 ts = &task->task_status;
1089
1090                 ts->resp = SAS_TASK_COMPLETE;
1091                 ts->stat = SAS_ABORTED_TASK;
1092                 spin_lock_irqsave(&task->task_state_lock, flags);
1093                 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1094                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1095                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1096                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1097         }
1098
1099         hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1100 }
1101
1102 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1103                         struct domain_device *device)
1104 {
1105         struct hisi_sas_slot *slot, *slot2;
1106         struct hisi_sas_device *sas_dev = device->lldd_dev;
1107
1108         spin_lock(&sas_dev->lock);
1109         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1110                 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1111
1112         spin_unlock(&sas_dev->lock);
1113 }
1114
1115 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1116 {
1117         struct hisi_sas_device *sas_dev;
1118         struct domain_device *device;
1119         int i;
1120
1121         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1122                 sas_dev = &hisi_hba->devices[i];
1123                 device = sas_dev->sas_device;
1124
1125                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1126                     !device)
1127                         continue;
1128
1129                 hisi_sas_release_task(hisi_hba, device);
1130         }
1131 }
1132 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1133
1134 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1135                                 struct domain_device *device)
1136 {
1137         if (hisi_hba->hw->dereg_device)
1138                 hisi_hba->hw->dereg_device(hisi_hba, device);
1139 }
1140
1141 static int
1142 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1143                                  bool rst_ha_timeout)
1144 {
1145         struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1146         struct domain_device *device = sas_dev->sas_device;
1147         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1148         int i, rc;
1149
1150         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1151                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1152                 const struct cpumask *mask = cq->irq_mask;
1153
1154                 if (mask && !cpumask_intersects(cpu_online_mask, mask))
1155                         continue;
1156                 rc = sas_execute_internal_abort_dev(device, i, &data);
1157                 if (rc)
1158                         return rc;
1159         }
1160
1161         return 0;
1162 }
1163
1164 static void hisi_sas_dev_gone(struct domain_device *device)
1165 {
1166         struct hisi_sas_device *sas_dev = device->lldd_dev;
1167         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1168         struct device *dev = hisi_hba->dev;
1169         int ret = 0;
1170
1171         dev_info(dev, "dev[%d:%x] is gone\n",
1172                  sas_dev->device_id, sas_dev->dev_type);
1173
1174         down(&hisi_hba->sem);
1175         if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1176                 hisi_sas_internal_task_abort_dev(sas_dev, true);
1177
1178                 hisi_sas_dereg_device(hisi_hba, device);
1179
1180                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1181                 device->lldd_dev = NULL;
1182         }
1183
1184         if (hisi_hba->hw->free_device)
1185                 hisi_hba->hw->free_device(sas_dev);
1186
1187         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1188         if (!ret)
1189                 sas_dev->dev_type = SAS_PHY_UNUSED;
1190         sas_dev->sas_device = NULL;
1191         up(&hisi_hba->sem);
1192 }
1193
1194 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1195                         struct sas_phy_linkrates *r)
1196 {
1197         struct sas_phy_linkrates _r;
1198
1199         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1200         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1201         enum sas_linkrate min, max;
1202
1203         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1204                 return -EINVAL;
1205
1206         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1207                 max = sas_phy->phy->maximum_linkrate;
1208                 min = r->minimum_linkrate;
1209         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1210                 max = r->maximum_linkrate;
1211                 min = sas_phy->phy->minimum_linkrate;
1212         } else
1213                 return -EINVAL;
1214
1215         _r.maximum_linkrate = max;
1216         _r.minimum_linkrate = min;
1217
1218         sas_phy->phy->maximum_linkrate = max;
1219         sas_phy->phy->minimum_linkrate = min;
1220
1221         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1222         msleep(100);
1223         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1224         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1225
1226         return 0;
1227 }
1228
1229 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1230                                 void *funcdata)
1231 {
1232         struct hisi_sas_phy *phy = container_of(sas_phy,
1233                         struct hisi_sas_phy, sas_phy);
1234         struct sas_ha_struct *sas_ha = sas_phy->ha;
1235         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1236         struct device *dev = hisi_hba->dev;
1237         DECLARE_COMPLETION_ONSTACK(completion);
1238         int phy_no = sas_phy->id;
1239         u8 sts = phy->phy_attached;
1240         int ret = 0;
1241
1242         down(&hisi_hba->sem);
1243         phy->reset_completion = &completion;
1244
1245         switch (func) {
1246         case PHY_FUNC_HARD_RESET:
1247                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1248                 break;
1249
1250         case PHY_FUNC_LINK_RESET:
1251                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1252                 msleep(100);
1253                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1254                 break;
1255
1256         case PHY_FUNC_DISABLE:
1257                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1258                 goto out;
1259
1260         case PHY_FUNC_SET_LINK_RATE:
1261                 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1262                 break;
1263
1264         case PHY_FUNC_GET_EVENTS:
1265                 if (hisi_hba->hw->get_events) {
1266                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1267                         goto out;
1268                 }
1269                 fallthrough;
1270         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1271         default:
1272                 ret = -EOPNOTSUPP;
1273                 goto out;
1274         }
1275
1276         if (sts && !wait_for_completion_timeout(&completion,
1277                 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1278                 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1279                          phy_no, func);
1280                 if (phy->in_reset)
1281                         ret = -ETIMEDOUT;
1282         }
1283
1284 out:
1285         phy->reset_completion = NULL;
1286
1287         up(&hisi_hba->sem);
1288         return ret;
1289 }
1290
1291 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1292                 bool reset, int pmp, u8 *fis)
1293 {
1294         struct ata_taskfile tf;
1295
1296         ata_tf_init(dev, &tf);
1297         if (reset)
1298                 tf.ctl |= ATA_SRST;
1299         else
1300                 tf.ctl &= ~ATA_SRST;
1301         tf.command = ATA_CMD_DEV_RESET;
1302         ata_tf_to_fis(&tf, pmp, 0, fis);
1303 }
1304
1305 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1306 {
1307         u8 fis[20] = {0};
1308         struct ata_port *ap = device->sata_dev.ap;
1309         struct ata_link *link;
1310         int rc = TMF_RESP_FUNC_FAILED;
1311         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1312         struct device *dev = hisi_hba->dev;
1313
1314         ata_for_each_link(link, ap, EDGE) {
1315                 int pmp = sata_srst_pmp(link);
1316
1317                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1318                 rc = sas_execute_ata_cmd(device, fis, -1);
1319                 if (rc != TMF_RESP_FUNC_COMPLETE)
1320                         break;
1321         }
1322
1323         if (rc == TMF_RESP_FUNC_COMPLETE) {
1324                 ata_for_each_link(link, ap, EDGE) {
1325                         int pmp = sata_srst_pmp(link);
1326
1327                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1328                         rc = sas_execute_ata_cmd(device, fis, -1);
1329                         if (rc != TMF_RESP_FUNC_COMPLETE)
1330                                 dev_err(dev, "ata disk %016llx de-reset failed\n",
1331                                         SAS_ADDR(device->sas_addr));
1332                 }
1333         } else {
1334                 dev_err(dev, "ata disk %016llx reset failed\n",
1335                         SAS_ADDR(device->sas_addr));
1336         }
1337
1338         if (rc == TMF_RESP_FUNC_COMPLETE)
1339                 hisi_sas_release_task(hisi_hba, device);
1340
1341         return rc;
1342 }
1343
1344 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1345 {
1346         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1347         int i;
1348
1349         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1350                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1351                 struct domain_device *device = sas_dev->sas_device;
1352                 struct asd_sas_port *sas_port;
1353                 struct hisi_sas_port *port;
1354                 struct hisi_sas_phy *phy = NULL;
1355                 struct asd_sas_phy *sas_phy;
1356
1357                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1358                                 || !device || !device->port)
1359                         continue;
1360
1361                 sas_port = device->port;
1362                 port = to_hisi_sas_port(sas_port);
1363
1364                 spin_lock(&sas_port->phy_list_lock);
1365                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1366                         if (state & BIT(sas_phy->id)) {
1367                                 phy = sas_phy->lldd_phy;
1368                                 break;
1369                         }
1370                 spin_unlock(&sas_port->phy_list_lock);
1371
1372                 if (phy) {
1373                         port->id = phy->port_id;
1374
1375                         /* Update linkrate of directly attached device. */
1376                         if (!device->parent)
1377                                 device->linkrate = phy->sas_phy.linkrate;
1378
1379                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1380                 } else if (!port->port_attached)
1381                         port->id = 0xff;
1382         }
1383 }
1384
1385 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1386 {
1387         struct asd_sas_port *_sas_port = NULL;
1388         int phy_no;
1389
1390         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1391                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1392                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1393                 struct asd_sas_port *sas_port = sas_phy->port;
1394                 bool do_port_check = _sas_port != sas_port;
1395
1396                 if (!sas_phy->phy->enabled)
1397                         continue;
1398
1399                 /* Report PHY state change to libsas */
1400                 if (state & BIT(phy_no)) {
1401                         if (do_port_check && sas_port && sas_port->port_dev) {
1402                                 struct domain_device *dev = sas_port->port_dev;
1403
1404                                 _sas_port = sas_port;
1405
1406                                 if (dev_is_expander(dev->dev_type))
1407                                         sas_notify_port_event(sas_phy,
1408                                                         PORTE_BROADCAST_RCVD,
1409                                                         GFP_KERNEL);
1410                         }
1411                 } else {
1412                         hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1413                 }
1414         }
1415 }
1416
1417 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1418 {
1419         struct hisi_sas_device *sas_dev;
1420         struct domain_device *device;
1421         int i;
1422
1423         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1424                 sas_dev = &hisi_hba->devices[i];
1425                 device = sas_dev->sas_device;
1426
1427                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1428                         continue;
1429
1430                 hisi_sas_init_device(device);
1431         }
1432 }
1433
1434 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1435                                              struct asd_sas_port *sas_port,
1436                                              struct domain_device *device)
1437 {
1438         struct ata_port *ap = device->sata_dev.ap;
1439         struct device *dev = hisi_hba->dev;
1440         int rc = TMF_RESP_FUNC_FAILED;
1441         struct ata_link *link;
1442         u8 fis[20] = {0};
1443         int i;
1444
1445         for (i = 0; i < hisi_hba->n_phy; i++) {
1446                 if (!(sas_port->phy_mask & BIT(i)))
1447                         continue;
1448
1449                 ata_for_each_link(link, ap, EDGE) {
1450                         int pmp = sata_srst_pmp(link);
1451
1452                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1453                         rc = sas_execute_ata_cmd(device, fis, i);
1454                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1455                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1456                                         i, rc);
1457                                 break;
1458                         }
1459                 }
1460         }
1461 }
1462
1463 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1464 {
1465         struct device *dev = hisi_hba->dev;
1466         int port_no, rc, i;
1467
1468         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1469                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1470                 struct domain_device *device = sas_dev->sas_device;
1471
1472                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1473                         continue;
1474
1475                 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1476                 if (rc < 0)
1477                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1478         }
1479
1480         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1481                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1482                 struct asd_sas_port *sas_port = &port->sas_port;
1483                 struct domain_device *port_dev = sas_port->port_dev;
1484                 struct domain_device *device;
1485
1486                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1487                         continue;
1488
1489                 /* Try to find a SATA device */
1490                 list_for_each_entry(device, &sas_port->dev_list,
1491                                     dev_list_node) {
1492                         if (dev_is_sata(device)) {
1493                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1494                                                                  sas_port,
1495                                                                  device);
1496                                 break;
1497                         }
1498                 }
1499         }
1500 }
1501
1502 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1503 {
1504         struct Scsi_Host *shost = hisi_hba->shost;
1505
1506         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1507
1508         scsi_block_requests(shost);
1509         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1510
1511         /*
1512          * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht
1513          * which is also only used for v1/v2 hw to skip it for v3 hw
1514          */
1515         if (hisi_hba->hw->sht)
1516                 del_timer_sync(&hisi_hba->timer);
1517
1518         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1519 }
1520 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1521
1522 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1523 {
1524         struct hisi_sas_phy *phy = data;
1525         struct hisi_hba *hisi_hba = phy->hisi_hba;
1526         struct device *dev = hisi_hba->dev;
1527         DECLARE_COMPLETION_ONSTACK(completion);
1528         int phy_no = phy->sas_phy.id;
1529
1530         phy->reset_completion = &completion;
1531         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1532         if (!wait_for_completion_timeout(&completion,
1533                                          HISI_SAS_WAIT_PHYUP_TIMEOUT))
1534                 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1535
1536         phy->reset_completion = NULL;
1537 }
1538
1539 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1540 {
1541         struct Scsi_Host *shost = hisi_hba->shost;
1542         ASYNC_DOMAIN_EXCLUSIVE(async);
1543         int phy_no;
1544
1545         /* Init and wait for PHYs to come up and all libsas event finished. */
1546         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1547                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1548
1549                 if (!(hisi_hba->phy_state & BIT(phy_no)))
1550                         continue;
1551
1552                 async_schedule_domain(hisi_sas_async_init_wait_phyup,
1553                                       phy, &async);
1554         }
1555
1556         async_synchronize_full_domain(&async);
1557         hisi_sas_refresh_port_id(hisi_hba);
1558         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1559
1560         if (hisi_hba->reject_stp_links_msk)
1561                 hisi_sas_terminate_stp_reject(hisi_hba);
1562         hisi_sas_reset_init_all_devices(hisi_hba);
1563         scsi_unblock_requests(shost);
1564         clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1565         up(&hisi_hba->sem);
1566
1567         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1568 }
1569 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1570
1571 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1572 {
1573         if (!hisi_hba->hw->soft_reset)
1574                 return -ENOENT;
1575
1576         down(&hisi_hba->sem);
1577         if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1578                 up(&hisi_hba->sem);
1579                 return -EPERM;
1580         }
1581
1582         if (hisi_sas_debugfs_enable)
1583                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1584
1585         return 0;
1586 }
1587
1588 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1589 {
1590         struct device *dev = hisi_hba->dev;
1591         struct Scsi_Host *shost = hisi_hba->shost;
1592         int rc;
1593
1594         dev_info(dev, "controller resetting...\n");
1595         hisi_sas_controller_reset_prepare(hisi_hba);
1596
1597         rc = hisi_hba->hw->soft_reset(hisi_hba);
1598         if (rc) {
1599                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1600                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1601                 up(&hisi_hba->sem);
1602                 scsi_unblock_requests(shost);
1603                 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1604                 return rc;
1605         }
1606         clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1607
1608         hisi_sas_controller_reset_done(hisi_hba);
1609         dev_info(dev, "controller reset complete\n");
1610
1611         return 0;
1612 }
1613
1614 static int hisi_sas_abort_task(struct sas_task *task)
1615 {
1616         struct hisi_sas_internal_abort_data internal_abort_data = { false };
1617         struct domain_device *device = task->dev;
1618         struct hisi_sas_device *sas_dev = device->lldd_dev;
1619         struct hisi_sas_slot *slot = task->lldd_task;
1620         struct hisi_hba *hisi_hba;
1621         struct device *dev;
1622         int rc = TMF_RESP_FUNC_FAILED;
1623         unsigned long flags;
1624
1625         if (!sas_dev)
1626                 return TMF_RESP_FUNC_FAILED;
1627
1628         hisi_hba = dev_to_hisi_hba(task->dev);
1629         dev = hisi_hba->dev;
1630
1631         spin_lock_irqsave(&task->task_state_lock, flags);
1632         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1633                 struct hisi_sas_cq *cq;
1634
1635                 if (slot) {
1636                         /*
1637                          * sync irq or poll queue to avoid free'ing task
1638                          * before using task in IO completion
1639                          */
1640                         cq = &hisi_hba->cq[slot->dlvry_queue];
1641                         hisi_sas_sync_cq(cq);
1642                 }
1643                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1644                 rc = TMF_RESP_FUNC_COMPLETE;
1645                 goto out;
1646         }
1647         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1648         spin_unlock_irqrestore(&task->task_state_lock, flags);
1649
1650         if (!slot)
1651                 goto out;
1652
1653         if (task->task_proto & SAS_PROTOCOL_SSP) {
1654                 u16 tag = slot->idx;
1655                 int rc2;
1656
1657                 rc = sas_abort_task(task, tag);
1658                 rc2 = sas_execute_internal_abort_single(device, tag,
1659                                 slot->dlvry_queue, &internal_abort_data);
1660                 if (rc2 < 0) {
1661                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1662                         return TMF_RESP_FUNC_FAILED;
1663                 }
1664
1665                 /*
1666                  * If the TMF finds that the IO is not in the device and also
1667                  * the internal abort does not succeed, then it is safe to
1668                  * free the slot.
1669                  * Note: if the internal abort succeeds then the slot
1670                  * will have already been completed
1671                  */
1672                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1673                         if (task->lldd_task)
1674                                 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1675                 }
1676         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1677                 task->task_proto & SAS_PROTOCOL_STP) {
1678                 if (task->dev->dev_type == SAS_SATA_DEV) {
1679                         struct ata_queued_cmd *qc = task->uldd_task;
1680
1681                         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1682                         if (rc < 0) {
1683                                 dev_err(dev, "abort task: internal abort failed\n");
1684                                 goto out;
1685                         }
1686                         hisi_sas_dereg_device(hisi_hba, device);
1687
1688                         /*
1689                          * If an ATA internal command times out in ATA EH, it
1690                          * need to execute soft reset, so check the scsicmd
1691                          */
1692                         if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1693                             qc && qc->scsicmd) {
1694                                 hisi_sas_do_release_task(hisi_hba, task, slot, true);
1695                                 rc = TMF_RESP_FUNC_COMPLETE;
1696                         } else {
1697                                 rc = hisi_sas_softreset_ata_disk(device);
1698                         }
1699                 }
1700         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1701                 /* SMP */
1702                 u32 tag = slot->idx;
1703                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1704
1705                 rc = sas_execute_internal_abort_single(device,
1706                                                        tag, slot->dlvry_queue,
1707                                                        &internal_abort_data);
1708                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1709                                         task->lldd_task) {
1710                         /*
1711                          * sync irq or poll queue to avoid free'ing task
1712                          * before using task in IO completion
1713                          */
1714                         hisi_sas_sync_cq(cq);
1715                         slot->task = NULL;
1716                 }
1717         }
1718
1719 out:
1720         if (rc != TMF_RESP_FUNC_COMPLETE)
1721                 dev_notice(dev, "abort task: rc=%d\n", rc);
1722         return rc;
1723 }
1724
1725 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1726 {
1727         struct hisi_sas_device *sas_dev = device->lldd_dev;
1728         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1729         struct device *dev = hisi_hba->dev;
1730         int rc;
1731
1732         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1733         if (rc < 0) {
1734                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1735                 return TMF_RESP_FUNC_FAILED;
1736         }
1737         hisi_sas_dereg_device(hisi_hba, device);
1738
1739         rc = sas_abort_task_set(device, lun);
1740         if (rc == TMF_RESP_FUNC_COMPLETE)
1741                 hisi_sas_release_task(hisi_hba, device);
1742
1743         return rc;
1744 }
1745
1746 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1747 {
1748         struct sas_phy *local_phy = sas_get_local_phy(device);
1749         struct hisi_sas_device *sas_dev = device->lldd_dev;
1750         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1751         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1752         int rc, reset_type;
1753
1754         if (!local_phy->enabled) {
1755                 sas_put_local_phy(local_phy);
1756                 return -ENODEV;
1757         }
1758
1759         if (scsi_is_sas_phy_local(local_phy)) {
1760                 struct asd_sas_phy *sas_phy =
1761                         sas_ha->sas_phy[local_phy->number];
1762                 struct hisi_sas_phy *phy =
1763                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1764                 unsigned long flags;
1765
1766                 spin_lock_irqsave(&phy->lock, flags);
1767                 phy->in_reset = 1;
1768                 spin_unlock_irqrestore(&phy->lock, flags);
1769         }
1770
1771         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1772                       !dev_is_sata(device)) ? true : false;
1773
1774         rc = sas_phy_reset(local_phy, reset_type);
1775         sas_put_local_phy(local_phy);
1776
1777         if (scsi_is_sas_phy_local(local_phy)) {
1778                 struct asd_sas_phy *sas_phy =
1779                         sas_ha->sas_phy[local_phy->number];
1780                 struct hisi_sas_phy *phy =
1781                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1782                 unsigned long flags;
1783
1784                 spin_lock_irqsave(&phy->lock, flags);
1785                 phy->in_reset = 0;
1786                 spin_unlock_irqrestore(&phy->lock, flags);
1787
1788                 /* report PHY down if timed out */
1789                 if (rc == -ETIMEDOUT)
1790                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1791                 return rc;
1792         }
1793
1794         /* Remote phy */
1795         if (rc)
1796                 return rc;
1797
1798         if (dev_is_sata(device)) {
1799                 struct ata_link *link = &device->sata_dev.ap->link;
1800
1801                 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1802                                           smp_ata_check_ready_type);
1803         } else {
1804                 msleep(2000);
1805         }
1806
1807         return rc;
1808 }
1809
1810 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1811 {
1812         struct hisi_sas_device *sas_dev = device->lldd_dev;
1813         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1814         struct device *dev = hisi_hba->dev;
1815         int rc;
1816
1817         if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1818                 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1819
1820         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1821         if (rc < 0) {
1822                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1823                 return TMF_RESP_FUNC_FAILED;
1824         }
1825         hisi_sas_dereg_device(hisi_hba, device);
1826
1827         rc = hisi_sas_debug_I_T_nexus_reset(device);
1828         if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
1829                 struct sas_phy *local_phy;
1830
1831                 rc = hisi_sas_softreset_ata_disk(device);
1832                 switch (rc) {
1833                 case -ECOMM:
1834                         rc = -ENODEV;
1835                         break;
1836                 case TMF_RESP_FUNC_FAILED:
1837                 case -EMSGSIZE:
1838                 case -EIO:
1839                         local_phy = sas_get_local_phy(device);
1840                         rc = sas_phy_enable(local_phy, 0);
1841                         if (!rc) {
1842                                 local_phy->enabled = 0;
1843                                 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
1844                                         SAS_ADDR(device->sas_addr), rc);
1845                                 rc = -ENODEV;
1846                         }
1847                         sas_put_local_phy(local_phy);
1848                         break;
1849                 default:
1850                         break;
1851                 }
1852         }
1853
1854         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1855                 hisi_sas_release_task(hisi_hba, device);
1856
1857         return rc;
1858 }
1859
1860 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1861 {
1862         struct hisi_sas_device *sas_dev = device->lldd_dev;
1863         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1864         struct device *dev = hisi_hba->dev;
1865         int rc = TMF_RESP_FUNC_FAILED;
1866
1867         /* Clear internal IO and then lu reset */
1868         rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1869         if (rc < 0) {
1870                 dev_err(dev, "lu_reset: internal abort failed\n");
1871                 goto out;
1872         }
1873         hisi_sas_dereg_device(hisi_hba, device);
1874
1875         if (dev_is_sata(device)) {
1876                 struct sas_phy *phy;
1877
1878                 phy = sas_get_local_phy(device);
1879
1880                 rc = sas_phy_reset(phy, true);
1881
1882                 if (rc == 0)
1883                         hisi_sas_release_task(hisi_hba, device);
1884                 sas_put_local_phy(phy);
1885         } else {
1886                 rc = sas_lu_reset(device, lun);
1887                 if (rc == TMF_RESP_FUNC_COMPLETE)
1888                         hisi_sas_release_task(hisi_hba, device);
1889         }
1890 out:
1891         if (rc != TMF_RESP_FUNC_COMPLETE)
1892                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1893                              sas_dev->device_id, rc);
1894         return rc;
1895 }
1896
1897 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1898 {
1899         struct domain_device *device = data;
1900         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1901         int rc;
1902
1903         rc = hisi_sas_debug_I_T_nexus_reset(device);
1904         if (rc != TMF_RESP_FUNC_COMPLETE)
1905                 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1906                          SAS_ADDR(device->sas_addr), rc);
1907 }
1908
1909 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1910 {
1911         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1912         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1913         ASYNC_DOMAIN_EXCLUSIVE(async);
1914         int i;
1915
1916         queue_work(hisi_hba->wq, &r.work);
1917         wait_for_completion(r.completion);
1918         if (!r.done)
1919                 return TMF_RESP_FUNC_FAILED;
1920
1921         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1922                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1923                 struct domain_device *device = sas_dev->sas_device;
1924
1925                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1926                     dev_is_expander(device->dev_type))
1927                         continue;
1928
1929                 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1930                                       device, &async);
1931         }
1932
1933         async_synchronize_full_domain(&async);
1934         hisi_sas_release_tasks(hisi_hba);
1935
1936         return TMF_RESP_FUNC_COMPLETE;
1937 }
1938
1939 static int hisi_sas_query_task(struct sas_task *task)
1940 {
1941         int rc = TMF_RESP_FUNC_FAILED;
1942
1943         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1944                 struct hisi_sas_slot *slot = task->lldd_task;
1945                 u32 tag = slot->idx;
1946
1947                 rc = sas_query_task(task, tag);
1948                 switch (rc) {
1949                 /* The task is still in Lun, release it then */
1950                 case TMF_RESP_FUNC_SUCC:
1951                 /* The task is not in Lun or failed, reset the phy */
1952                 case TMF_RESP_FUNC_FAILED:
1953                 case TMF_RESP_FUNC_COMPLETE:
1954                         break;
1955                 default:
1956                         rc = TMF_RESP_FUNC_FAILED;
1957                         break;
1958                 }
1959         }
1960         return rc;
1961 }
1962
1963 static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
1964                                             void *data)
1965 {
1966         struct domain_device *device = task->dev;
1967         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1968         struct hisi_sas_internal_abort_data *timeout = data;
1969
1970         if (hisi_sas_debugfs_enable) {
1971                 /*
1972                  * If timeout occurs in device gone scenario, to avoid
1973                  * circular dependency like:
1974                  * hisi_sas_dev_gone() -> down() -> ... ->
1975                  * hisi_sas_internal_abort_timeout() -> down().
1976                  */
1977                 if (!timeout->rst_ha_timeout)
1978                         down(&hisi_hba->sem);
1979                 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1980                 if (!timeout->rst_ha_timeout)
1981                         up(&hisi_hba->sem);
1982         }
1983
1984         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1985                 pr_err("Internal abort: timeout %016llx\n",
1986                        SAS_ADDR(device->sas_addr));
1987         } else {
1988                 struct hisi_sas_slot *slot = task->lldd_task;
1989
1990                 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1991
1992                 if (slot) {
1993                         struct hisi_sas_cq *cq =
1994                                 &hisi_hba->cq[slot->dlvry_queue];
1995                         /*
1996                          * sync irq or poll queue to avoid free'ing task
1997                          * before using task in IO completion
1998                          */
1999                         hisi_sas_sync_cq(cq);
2000                         slot->task = NULL;
2001                 }
2002
2003                 if (timeout->rst_ha_timeout) {
2004                         pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
2005                                SAS_ADDR(device->sas_addr));
2006                         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2007                 } else {
2008                         pr_err("Internal abort: timeout and not done %016llx.\n",
2009                                SAS_ADDR(device->sas_addr));
2010                 }
2011
2012                 return true;
2013         }
2014
2015         return false;
2016 }
2017
2018 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2019 {
2020         hisi_sas_port_notify_formed(sas_phy);
2021 }
2022
2023 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2024                         u8 reg_index, u8 reg_count, u8 *write_data)
2025 {
2026         struct hisi_hba *hisi_hba = sha->lldd_ha;
2027
2028         if (!hisi_hba->hw->write_gpio)
2029                 return -EOPNOTSUPP;
2030
2031         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2032                                 reg_index, reg_count, write_data);
2033 }
2034
2035 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2036 {
2037         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2038         struct sas_phy *sphy = sas_phy->phy;
2039         unsigned long flags;
2040
2041         phy->phy_attached = 0;
2042         phy->phy_type = 0;
2043         phy->port = NULL;
2044
2045         spin_lock_irqsave(&phy->lock, flags);
2046         if (phy->enable)
2047                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2048         else
2049                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2050         spin_unlock_irqrestore(&phy->lock, flags);
2051 }
2052
2053 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2054                        gfp_t gfp_flags)
2055 {
2056         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2057         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2058         struct device *dev = hisi_hba->dev;
2059
2060         if (rdy) {
2061                 /* Phy down but ready */
2062                 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2063                 hisi_sas_port_notify_formed(sas_phy);
2064         } else {
2065                 struct hisi_sas_port *port  = phy->port;
2066
2067                 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2068                     phy->in_reset) {
2069                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2070                         return;
2071                 }
2072                 /* Phy down and not ready */
2073                 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2074                 sas_phy_disconnected(sas_phy);
2075
2076                 if (port) {
2077                         if (phy->phy_type & PORT_TYPE_SAS) {
2078                                 int port_id = port->id;
2079
2080                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2081                                                                        port_id))
2082                                         port->port_attached = 0;
2083                         } else if (phy->phy_type & PORT_TYPE_SATA)
2084                                 port->port_attached = 0;
2085                 }
2086                 hisi_sas_phy_disconnected(phy);
2087         }
2088 }
2089 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2090
2091 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2092 {
2093         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2094         struct hisi_hba *hisi_hba = phy->hisi_hba;
2095
2096         if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2097                 return;
2098
2099         sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2100 }
2101 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2102
2103 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2104 {
2105         struct hisi_hba *hisi_hba = shost_priv(shost);
2106
2107         if (reset_type != SCSI_ADAPTER_RESET)
2108                 return -EOPNOTSUPP;
2109
2110         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2111
2112         return 0;
2113 }
2114 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2115
2116 struct scsi_transport_template *hisi_sas_stt;
2117 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2118
2119 static struct sas_domain_function_template hisi_sas_transport_ops = {
2120         .lldd_dev_found         = hisi_sas_dev_found,
2121         .lldd_dev_gone          = hisi_sas_dev_gone,
2122         .lldd_execute_task      = hisi_sas_queue_command,
2123         .lldd_control_phy       = hisi_sas_control_phy,
2124         .lldd_abort_task        = hisi_sas_abort_task,
2125         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2126         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2127         .lldd_lu_reset          = hisi_sas_lu_reset,
2128         .lldd_query_task        = hisi_sas_query_task,
2129         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2130         .lldd_port_formed       = hisi_sas_port_formed,
2131         .lldd_write_gpio        = hisi_sas_write_gpio,
2132         .lldd_tmf_aborted       = hisi_sas_tmf_aborted,
2133         .lldd_abort_timeout     = hisi_sas_internal_abort_timeout,
2134 };
2135
2136 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2137 {
2138         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2139         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2140
2141         for (i = 0; i < hisi_hba->queue_count; i++) {
2142                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2143                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2144                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2145
2146                 s = sizeof(struct hisi_sas_cmd_hdr);
2147                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2148                         memset(&cmd_hdr[j], 0, s);
2149
2150                 dq->wr_point = 0;
2151
2152                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2153                 memset(hisi_hba->complete_hdr[i], 0, s);
2154                 cq->rd_point = 0;
2155         }
2156
2157         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2158         memset(hisi_hba->initial_fis, 0, s);
2159
2160         s = max_command_entries * sizeof(struct hisi_sas_iost);
2161         memset(hisi_hba->iost, 0, s);
2162
2163         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2164         memset(hisi_hba->breakpoint, 0, s);
2165
2166         s = sizeof(struct hisi_sas_sata_breakpoint);
2167         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2168                 memset(&sata_breakpoint[j], 0, s);
2169 }
2170 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2171
2172 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2173 {
2174         struct device *dev = hisi_hba->dev;
2175         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2176         int max_command_entries_ru, sz_slot_buf_ru;
2177         int blk_cnt, slots_per_blk;
2178
2179         sema_init(&hisi_hba->sem, 1);
2180         spin_lock_init(&hisi_hba->lock);
2181         for (i = 0; i < hisi_hba->n_phy; i++) {
2182                 hisi_sas_phy_init(hisi_hba, i);
2183                 hisi_hba->port[i].port_attached = 0;
2184                 hisi_hba->port[i].id = -1;
2185         }
2186
2187         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2188                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2189                 hisi_hba->devices[i].device_id = i;
2190                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2191         }
2192
2193         for (i = 0; i < hisi_hba->queue_count; i++) {
2194                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2195                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2196
2197                 /* Completion queue structure */
2198                 cq->id = i;
2199                 cq->hisi_hba = hisi_hba;
2200                 spin_lock_init(&cq->poll_lock);
2201
2202                 /* Delivery queue structure */
2203                 spin_lock_init(&dq->lock);
2204                 INIT_LIST_HEAD(&dq->list);
2205                 dq->id = i;
2206                 dq->hisi_hba = hisi_hba;
2207
2208                 /* Delivery queue */
2209                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2210                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2211                                                 &hisi_hba->cmd_hdr_dma[i],
2212                                                 GFP_KERNEL);
2213                 if (!hisi_hba->cmd_hdr[i])
2214                         goto err_out;
2215
2216                 /* Completion queue */
2217                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2218                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2219                                                 &hisi_hba->complete_hdr_dma[i],
2220                                                 GFP_KERNEL);
2221                 if (!hisi_hba->complete_hdr[i])
2222                         goto err_out;
2223         }
2224
2225         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2226         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2227                                              GFP_KERNEL);
2228         if (!hisi_hba->itct)
2229                 goto err_out;
2230
2231         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2232                                            sizeof(struct hisi_sas_slot),
2233                                            GFP_KERNEL);
2234         if (!hisi_hba->slot_info)
2235                 goto err_out;
2236
2237         /* roundup to avoid overly large block size */
2238         max_command_entries_ru = roundup(max_command_entries, 64);
2239         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2240                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2241         else
2242                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2243         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2244         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2245         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2246         slots_per_blk = s / sz_slot_buf_ru;
2247
2248         for (i = 0; i < blk_cnt; i++) {
2249                 int slot_index = i * slots_per_blk;
2250                 dma_addr_t buf_dma;
2251                 void *buf;
2252
2253                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2254                                           GFP_KERNEL);
2255                 if (!buf)
2256                         goto err_out;
2257
2258                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2259                         struct hisi_sas_slot *slot;
2260
2261                         slot = &hisi_hba->slot_info[slot_index];
2262                         slot->buf = buf;
2263                         slot->buf_dma = buf_dma;
2264                         slot->idx = slot_index;
2265
2266                         buf += sz_slot_buf_ru;
2267                         buf_dma += sz_slot_buf_ru;
2268                 }
2269         }
2270
2271         s = max_command_entries * sizeof(struct hisi_sas_iost);
2272         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2273                                              GFP_KERNEL);
2274         if (!hisi_hba->iost)
2275                 goto err_out;
2276
2277         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2278         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2279                                                    &hisi_hba->breakpoint_dma,
2280                                                    GFP_KERNEL);
2281         if (!hisi_hba->breakpoint)
2282                 goto err_out;
2283
2284         s = hisi_hba->slot_index_count = max_command_entries;
2285         hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2286         if (!hisi_hba->slot_index_tags)
2287                 goto err_out;
2288
2289         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2290         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2291                                                     &hisi_hba->initial_fis_dma,
2292                                                     GFP_KERNEL);
2293         if (!hisi_hba->initial_fis)
2294                 goto err_out;
2295
2296         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2297         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2298                                         &hisi_hba->sata_breakpoint_dma,
2299                                         GFP_KERNEL);
2300         if (!hisi_hba->sata_breakpoint)
2301                 goto err_out;
2302
2303         hisi_hba->last_slot_index = 0;
2304
2305         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2306         if (!hisi_hba->wq) {
2307                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2308                 goto err_out;
2309         }
2310
2311         return 0;
2312 err_out:
2313         return -ENOMEM;
2314 }
2315 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2316
2317 void hisi_sas_free(struct hisi_hba *hisi_hba)
2318 {
2319         int i;
2320
2321         for (i = 0; i < hisi_hba->n_phy; i++) {
2322                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2323
2324                 del_timer_sync(&phy->timer);
2325         }
2326
2327         if (hisi_hba->wq)
2328                 destroy_workqueue(hisi_hba->wq);
2329 }
2330 EXPORT_SYMBOL_GPL(hisi_sas_free);
2331
2332 void hisi_sas_rst_work_handler(struct work_struct *work)
2333 {
2334         struct hisi_hba *hisi_hba =
2335                 container_of(work, struct hisi_hba, rst_work);
2336
2337         if (hisi_sas_controller_prereset(hisi_hba))
2338                 return;
2339
2340         hisi_sas_controller_reset(hisi_hba);
2341 }
2342 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2343
2344 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2345 {
2346         struct hisi_sas_rst *rst =
2347                 container_of(work, struct hisi_sas_rst, work);
2348
2349         if (hisi_sas_controller_prereset(rst->hisi_hba))
2350                 goto rst_complete;
2351
2352         if (!hisi_sas_controller_reset(rst->hisi_hba))
2353                 rst->done = true;
2354 rst_complete:
2355         complete(rst->completion);
2356 }
2357 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2358
2359 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2360 {
2361         struct device *dev = hisi_hba->dev;
2362         struct platform_device *pdev = hisi_hba->platform_dev;
2363         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2364         struct clk *refclk;
2365
2366         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2367                                           SAS_ADDR_SIZE)) {
2368                 dev_err(dev, "could not get property sas-addr\n");
2369                 return -ENOENT;
2370         }
2371
2372         if (np) {
2373                 /*
2374                  * These properties are only required for platform device-based
2375                  * controller with DT firmware.
2376                  */
2377                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2378                                         "hisilicon,sas-syscon");
2379                 if (IS_ERR(hisi_hba->ctrl)) {
2380                         dev_err(dev, "could not get syscon\n");
2381                         return -ENOENT;
2382                 }
2383
2384                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2385                                              &hisi_hba->ctrl_reset_reg)) {
2386                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2387                         return -ENOENT;
2388                 }
2389
2390                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2391                                              &hisi_hba->ctrl_reset_sts_reg)) {
2392                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2393                         return -ENOENT;
2394                 }
2395
2396                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2397                                              &hisi_hba->ctrl_clock_ena_reg)) {
2398                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2399                         return -ENOENT;
2400                 }
2401         }
2402
2403         refclk = devm_clk_get(dev, NULL);
2404         if (IS_ERR(refclk))
2405                 dev_dbg(dev, "no ref clk property\n");
2406         else
2407                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2408
2409         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2410                 dev_err(dev, "could not get property phy-count\n");
2411                 return -ENOENT;
2412         }
2413
2414         if (device_property_read_u32(dev, "queue-count",
2415                                      &hisi_hba->queue_count)) {
2416                 dev_err(dev, "could not get property queue-count\n");
2417                 return -ENOENT;
2418         }
2419
2420         return 0;
2421 }
2422 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2423
2424 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2425                                               const struct hisi_sas_hw *hw)
2426 {
2427         struct resource *res;
2428         struct Scsi_Host *shost;
2429         struct hisi_hba *hisi_hba;
2430         struct device *dev = &pdev->dev;
2431         int error;
2432
2433         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2434         if (!shost) {
2435                 dev_err(dev, "scsi host alloc failed\n");
2436                 return NULL;
2437         }
2438         hisi_hba = shost_priv(shost);
2439
2440         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2441         hisi_hba->hw = hw;
2442         hisi_hba->dev = dev;
2443         hisi_hba->platform_dev = pdev;
2444         hisi_hba->shost = shost;
2445         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2446
2447         timer_setup(&hisi_hba->timer, NULL, 0);
2448
2449         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2450                 goto err_out;
2451
2452         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2453         if (error) {
2454                 dev_err(dev, "No usable DMA addressing method\n");
2455                 goto err_out;
2456         }
2457
2458         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2459         if (IS_ERR(hisi_hba->regs))
2460                 goto err_out;
2461
2462         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2463         if (res) {
2464                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2465                 if (IS_ERR(hisi_hba->sgpio_regs))
2466                         goto err_out;
2467         }
2468
2469         if (hisi_sas_alloc(hisi_hba)) {
2470                 hisi_sas_free(hisi_hba);
2471                 goto err_out;
2472         }
2473
2474         return shost;
2475 err_out:
2476         scsi_host_put(shost);
2477         dev_err(dev, "shost alloc failed\n");
2478         return NULL;
2479 }
2480
2481 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2482 {
2483         if (hisi_hba->hw->interrupt_preinit)
2484                 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2485         return 0;
2486 }
2487
2488 int hisi_sas_probe(struct platform_device *pdev,
2489                    const struct hisi_sas_hw *hw)
2490 {
2491         struct Scsi_Host *shost;
2492         struct hisi_hba *hisi_hba;
2493         struct device *dev = &pdev->dev;
2494         struct asd_sas_phy **arr_phy;
2495         struct asd_sas_port **arr_port;
2496         struct sas_ha_struct *sha;
2497         int rc, phy_nr, port_nr, i;
2498
2499         shost = hisi_sas_shost_alloc(pdev, hw);
2500         if (!shost)
2501                 return -ENOMEM;
2502
2503         sha = SHOST_TO_SAS_HA(shost);
2504         hisi_hba = shost_priv(shost);
2505         platform_set_drvdata(pdev, sha);
2506
2507         phy_nr = port_nr = hisi_hba->n_phy;
2508
2509         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2510         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2511         if (!arr_phy || !arr_port) {
2512                 rc = -ENOMEM;
2513                 goto err_out_ha;
2514         }
2515
2516         sha->sas_phy = arr_phy;
2517         sha->sas_port = arr_port;
2518         sha->lldd_ha = hisi_hba;
2519
2520         shost->transportt = hisi_sas_stt;
2521         shost->max_id = HISI_SAS_MAX_DEVICES;
2522         shost->max_lun = ~0;
2523         shost->max_channel = 1;
2524         shost->max_cmd_len = 16;
2525         if (hisi_hba->hw->slot_index_alloc) {
2526                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2527                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2528         } else {
2529                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2530                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2531         }
2532
2533         sha->sas_ha_name = DRV_NAME;
2534         sha->dev = hisi_hba->dev;
2535         sha->sas_addr = &hisi_hba->sas_addr[0];
2536         sha->num_phys = hisi_hba->n_phy;
2537         sha->shost = hisi_hba->shost;
2538
2539         for (i = 0; i < hisi_hba->n_phy; i++) {
2540                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2541                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2542         }
2543
2544         rc = hisi_sas_interrupt_preinit(hisi_hba);
2545         if (rc)
2546                 goto err_out_ha;
2547
2548         rc = scsi_add_host(shost, &pdev->dev);
2549         if (rc)
2550                 goto err_out_ha;
2551
2552         rc = sas_register_ha(sha);
2553         if (rc)
2554                 goto err_out_register_ha;
2555
2556         rc = hisi_hba->hw->hw_init(hisi_hba);
2557         if (rc)
2558                 goto err_out_hw_init;
2559
2560         scsi_scan_host(shost);
2561
2562         return 0;
2563
2564 err_out_hw_init:
2565         sas_unregister_ha(sha);
2566 err_out_register_ha:
2567         scsi_remove_host(shost);
2568 err_out_ha:
2569         hisi_sas_free(hisi_hba);
2570         scsi_host_put(shost);
2571         return rc;
2572 }
2573 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2574
2575 void hisi_sas_remove(struct platform_device *pdev)
2576 {
2577         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2578         struct hisi_hba *hisi_hba = sha->lldd_ha;
2579         struct Scsi_Host *shost = sha->shost;
2580
2581         del_timer_sync(&hisi_hba->timer);
2582
2583         sas_unregister_ha(sha);
2584         sas_remove_host(shost);
2585
2586         hisi_sas_free(hisi_hba);
2587         scsi_host_put(shost);
2588 }
2589 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2590
2591 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2592 #define DEBUGFS_ENABLE_DEFAULT  "enabled"
2593 bool hisi_sas_debugfs_enable = true;
2594 u32 hisi_sas_debugfs_dump_count = 50;
2595 #else
2596 #define DEBUGFS_ENABLE_DEFAULT "disabled"
2597 bool hisi_sas_debugfs_enable;
2598 u32 hisi_sas_debugfs_dump_count = 1;
2599 #endif
2600
2601 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2602 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2603 MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2604                  "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2605
2606 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2607 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2608 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2609
2610 struct dentry *hisi_sas_debugfs_dir;
2611 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2612
2613 static __init int hisi_sas_init(void)
2614 {
2615         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2616         if (!hisi_sas_stt)
2617                 return -ENOMEM;
2618
2619         if (hisi_sas_debugfs_enable) {
2620                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2621                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2622                         pr_info("hisi_sas: Limiting debugfs dump count\n");
2623                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2624                 }
2625         }
2626
2627         return 0;
2628 }
2629
2630 static __exit void hisi_sas_exit(void)
2631 {
2632         sas_release_transport(hisi_sas_stt);
2633
2634         if (hisi_sas_debugfs_enable)
2635                 debugfs_remove(hisi_sas_debugfs_dir);
2636 }
2637
2638 module_init(hisi_sas_init);
2639 module_exit(hisi_sas_exit);
2640
2641 MODULE_LICENSE("GPL");
2642 MODULE_AUTHOR("John Garry <[email protected]>");
2643 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2644 MODULE_ALIAS("platform:" DRV_NAME);