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