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_debug_issue_ssp_tmf(struct domain_device *device,
  14                                 u8 *lun, struct hisi_sas_tmf_task *tmf);
  15 static int
  16 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
  17                              struct domain_device *device,
  18                              int abort_flag, int tag);
  19 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  20 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  21                                 void *funcdata);
  22 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  23                                   struct domain_device *device);
  24 static void hisi_sas_dev_gone(struct domain_device *device);
  25
  26 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
  27 {
  28         switch (fis->command) {
  29         case ATA_CMD_FPDMA_WRITE:
  30         case ATA_CMD_FPDMA_READ:
  31         case ATA_CMD_FPDMA_RECV:
  32         case ATA_CMD_FPDMA_SEND:
  33         case ATA_CMD_NCQ_NON_DATA:
  34                 return HISI_SAS_SATA_PROTOCOL_FPDMA;
  35
  36         case ATA_CMD_DOWNLOAD_MICRO:
  37         case ATA_CMD_ID_ATA:
  38         case ATA_CMD_PMP_READ:
  39         case ATA_CMD_READ_LOG_EXT:
  40         case ATA_CMD_PIO_READ:
  41         case ATA_CMD_PIO_READ_EXT:
  42         case ATA_CMD_PMP_WRITE:
  43         case ATA_CMD_WRITE_LOG_EXT:
  44         case ATA_CMD_PIO_WRITE:
  45         case ATA_CMD_PIO_WRITE_EXT:
  46                 return HISI_SAS_SATA_PROTOCOL_PIO;
  47
  48         case ATA_CMD_DSM:
  49         case ATA_CMD_DOWNLOAD_MICRO_DMA:
  50         case ATA_CMD_PMP_READ_DMA:
  51         case ATA_CMD_PMP_WRITE_DMA:
  52         case ATA_CMD_READ:
  53         case ATA_CMD_READ_EXT:
  54         case ATA_CMD_READ_LOG_DMA_EXT:
  55         case ATA_CMD_READ_STREAM_DMA_EXT:
  56         case ATA_CMD_TRUSTED_RCV_DMA:
  57         case ATA_CMD_TRUSTED_SND_DMA:
  58         case ATA_CMD_WRITE:
  59         case ATA_CMD_WRITE_EXT:
  60         case ATA_CMD_WRITE_FUA_EXT:
  61         case ATA_CMD_WRITE_QUEUED:
  62         case ATA_CMD_WRITE_LOG_DMA_EXT:
  63         case ATA_CMD_WRITE_STREAM_DMA_EXT:
  64         case ATA_CMD_ZAC_MGMT_IN:
  65                 return HISI_SAS_SATA_PROTOCOL_DMA;
  66
  67         case ATA_CMD_CHK_POWER:
  68         case ATA_CMD_DEV_RESET:
  69         case ATA_CMD_EDD:
  70         case ATA_CMD_FLUSH:
  71         case ATA_CMD_FLUSH_EXT:
  72         case ATA_CMD_VERIFY:
  73         case ATA_CMD_VERIFY_EXT:
  74         case ATA_CMD_SET_FEATURES:
  75         case ATA_CMD_STANDBY:
  76         case ATA_CMD_STANDBYNOW1:
  77         case ATA_CMD_ZAC_MGMT_OUT:
  78                 return HISI_SAS_SATA_PROTOCOL_NONDATA;
  79
  80         case ATA_CMD_SET_MAX:
  81                 switch (fis->features) {
  82                 case ATA_SET_MAX_PASSWD:
  83                 case ATA_SET_MAX_LOCK:
  84                         return HISI_SAS_SATA_PROTOCOL_PIO;
  85
  86                 case ATA_SET_MAX_PASSWD_DMA:
  87                 case ATA_SET_MAX_UNLOCK_DMA:
  88                         return HISI_SAS_SATA_PROTOCOL_DMA;
  89
  90                 default:
  91                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  92                 }
  93
  94         default:
  95         {
  96                 if (direction == DMA_NONE)
  97                         return HISI_SAS_SATA_PROTOCOL_NONDATA;
  98                 return HISI_SAS_SATA_PROTOCOL_PIO;
  99         }
 100         }
 101 }
 102 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 103
 104 void hisi_sas_sata_done(struct sas_task *task,
 105                             struct hisi_sas_slot *slot)
 106 {
 107         struct task_status_struct *ts = &task->task_status;
 108         struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 109         struct hisi_sas_status_buffer *status_buf =
 110                         hisi_sas_status_buf_addr_mem(slot);
 111         u8 *iu = &status_buf->iu[0];
 112         struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
 113
 114         resp->frame_len = sizeof(struct dev_to_host_fis);
 115         memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 116
 117         ts->buf_valid_size = sizeof(*resp);
 118 }
 119 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 120
 121 /*
 122  * This function assumes linkrate mask fits in 8 bits, which it
 123  * does for all HW versions supported.
 124  */
 125 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 126 {
 127         u8 rate = 0;
 128         int i;
 129
 130         max -= SAS_LINK_RATE_1_5_GBPS;
 131         for (i = 0; i <= max; i++)
 132                 rate |= 1 << (i * 2);
 133         return rate;
 134 }
 135 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 136
 137 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 138 {
 139         return device->port->ha->lldd_ha;
 140 }
 141
 142 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 143 {
 144         return container_of(sas_port, struct hisi_sas_port, sas_port);
 145 }
 146 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 147
 148 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 149 {
 150         int phy_no;
 151
 152         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 153                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 154 }
 155 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 156
 157 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 158 {
 159         void *bitmap = hisi_hba->slot_index_tags;
 160
 161         clear_bit(slot_idx, bitmap);
 162 }
 163
 164 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 165 {
 166         if (hisi_hba->hw->slot_index_alloc ||
 167             slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
 168                 spin_lock(&hisi_hba->lock);
 169                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 170                 spin_unlock(&hisi_hba->lock);
 171         }
 172 }
 173
 174 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 175 {
 176         void *bitmap = hisi_hba->slot_index_tags;
 177
 178         set_bit(slot_idx, bitmap);
 179 }
 180
 181 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 182                                      struct scsi_cmnd *scsi_cmnd)
 183 {
 184         int index;
 185         void *bitmap = hisi_hba->slot_index_tags;
 186
 187         if (scsi_cmnd)
 188                 return scsi_cmnd->request->tag;
 189
 190         spin_lock(&hisi_hba->lock);
 191         index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
 192                                    hisi_hba->last_slot_index + 1);
 193         if (index >= hisi_hba->slot_index_count) {
 194                 index = find_next_zero_bit(bitmap,
 195                                 hisi_hba->slot_index_count,
 196                                 HISI_SAS_UNRESERVED_IPTT);
 197                 if (index >= hisi_hba->slot_index_count) {
 198                         spin_unlock(&hisi_hba->lock);
 199                         return -SAS_QUEUE_FULL;
 200                 }
 201         }
 202         hisi_sas_slot_index_set(hisi_hba, index);
 203         hisi_hba->last_slot_index = index;
 204         spin_unlock(&hisi_hba->lock);
 205
 206         return index;
 207 }
 208
 209 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 210 {
 211         int i;
 212
 213         for (i = 0; i < hisi_hba->slot_index_count; ++i)
 214                 hisi_sas_slot_index_clear(hisi_hba, i);
 215 }
 216
 217 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 218                              struct hisi_sas_slot *slot)
 219 {
 220         int device_id = slot->device_id;
 221         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 222
 223         if (task) {
 224                 struct device *dev = hisi_hba->dev;
 225
 226                 if (!task->lldd_task)
 227                         return;
 228
 229                 task->lldd_task = NULL;
 230
 231                 if (!sas_protocol_ata(task->task_proto)) {
 232                         if (slot->n_elem)
 233                                 dma_unmap_sg(dev, task->scatter,
 234                                              task->num_scatter,
 235                                              task->data_dir);
 236                         if (slot->n_elem_dif) {
 237                                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 238                                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 239
 240                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 241                                              scsi_prot_sg_count(scsi_cmnd),
 242                                              task->data_dir);
 243                         }
 244                 }
 245         }
 246
 247         spin_lock(&sas_dev->lock);
 248         list_del_init(&slot->entry);
 249         spin_unlock(&sas_dev->lock);
 250
 251         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 252
 253         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 254 }
 255 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 256
 257 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 258                                   struct hisi_sas_slot *slot)
 259 {
 260         hisi_hba->hw->prep_smp(hisi_hba, slot);
 261 }
 262
 263 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 264                                   struct hisi_sas_slot *slot)
 265 {
 266         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 267 }
 268
 269 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 270                                   struct hisi_sas_slot *slot)
 271 {
 272         hisi_hba->hw->prep_stp(hisi_hba, slot);
 273 }
 274
 275 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 276                 struct hisi_sas_slot *slot,
 277                 int device_id, int abort_flag, int tag_to_abort)
 278 {
 279         hisi_hba->hw->prep_abort(hisi_hba, slot,
 280                         device_id, abort_flag, tag_to_abort);
 281 }
 282
 283 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 284                                struct sas_task *task, int n_elem,
 285                                int n_elem_req)
 286 {
 287         struct device *dev = hisi_hba->dev;
 288
 289         if (!sas_protocol_ata(task->task_proto)) {
 290                 if (task->num_scatter) {
 291                         if (n_elem)
 292                                 dma_unmap_sg(dev, task->scatter,
 293                                              task->num_scatter,
 294                                              task->data_dir);
 295                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 296                         if (n_elem_req)
 297                                 dma_unmap_sg(dev, &task->smp_task.smp_req,
 298                                              1, DMA_TO_DEVICE);
 299                 }
 300         }
 301 }
 302
 303 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 304                             struct sas_task *task, int *n_elem,
 305                             int *n_elem_req)
 306 {
 307         struct device *dev = hisi_hba->dev;
 308         int rc;
 309
 310         if (sas_protocol_ata(task->task_proto)) {
 311                 *n_elem = task->num_scatter;
 312         } else {
 313                 unsigned int req_len;
 314
 315                 if (task->num_scatter) {
 316                         *n_elem = dma_map_sg(dev, task->scatter,
 317                                              task->num_scatter, task->data_dir);
 318                         if (!*n_elem) {
 319                                 rc = -ENOMEM;
 320                                 goto prep_out;
 321                         }
 322                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 323                         *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 324                                                  1, DMA_TO_DEVICE);
 325                         if (!*n_elem_req) {
 326                                 rc = -ENOMEM;
 327                                 goto prep_out;
 328                         }
 329                         req_len = sg_dma_len(&task->smp_task.smp_req);
 330                         if (req_len & 0x3) {
 331                                 rc = -EINVAL;
 332                                 goto err_out_dma_unmap;
 333                         }
 334                 }
 335         }
 336
 337         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 338                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 339                         *n_elem);
 340                 rc = -EINVAL;
 341                 goto err_out_dma_unmap;
 342         }
 343         return 0;
 344
 345 err_out_dma_unmap:
 346         /* It would be better to call dma_unmap_sg() here, but it's messy */
 347         hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 348                            *n_elem_req);
 349 prep_out:
 350         return rc;
 351 }
 352
 353 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 354                                    struct sas_task *task, int n_elem_dif)
 355 {
 356         struct device *dev = hisi_hba->dev;
 357
 358         if (n_elem_dif) {
 359                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 360                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 361
 362                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 363                              scsi_prot_sg_count(scsi_cmnd),
 364                              task->data_dir);
 365         }
 366 }
 367
 368 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 369                                 int *n_elem_dif, struct sas_task *task)
 370 {
 371         struct device *dev = hisi_hba->dev;
 372         struct sas_ssp_task *ssp_task;
 373         struct scsi_cmnd *scsi_cmnd;
 374         int rc;
 375
 376         if (task->num_scatter) {
 377                 ssp_task = &task->ssp_task;
 378                 scsi_cmnd = ssp_task->cmd;
 379
 380                 if (scsi_prot_sg_count(scsi_cmnd)) {
 381                         *n_elem_dif = dma_map_sg(dev,
 382                                                  scsi_prot_sglist(scsi_cmnd),
 383                                                  scsi_prot_sg_count(scsi_cmnd),
 384                                                  task->data_dir);
 385
 386                         if (!*n_elem_dif)
 387                                 return -ENOMEM;
 388
 389                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 390                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 391                                         *n_elem_dif);
 392                                 rc = -EINVAL;
 393                                 goto err_out_dif_dma_unmap;
 394                         }
 395                 }
 396         }
 397
 398         return 0;
 399
 400 err_out_dif_dma_unmap:
 401         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 402                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 403         return rc;
 404 }
 405
 406 static int hisi_sas_task_prep(struct sas_task *task,
 407                               struct hisi_sas_dq **dq_pointer,
 408                               bool is_tmf, struct hisi_sas_tmf_task *tmf,
 409                               int *pass)
 410 {
 411         struct domain_device *device = task->dev;
 412         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 413         struct hisi_sas_device *sas_dev = device->lldd_dev;
 414         struct hisi_sas_port *port;
 415         struct hisi_sas_slot *slot;
 416         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 417         struct asd_sas_port *sas_port = device->port;
 418         struct device *dev = hisi_hba->dev;
 419         int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
 420         int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
 421         struct scsi_cmnd *scmd = NULL;
 422         struct hisi_sas_dq *dq;
 423         unsigned long flags;
 424         int wr_q_index;
 425
 426         if (DEV_IS_GONE(sas_dev)) {
 427                 if (sas_dev)
 428                         dev_info(dev, "task prep: device %d not ready\n",
 429                                  sas_dev->device_id);
 430                 else
 431                         dev_info(dev, "task prep: device %016llx not ready\n",
 432                                  SAS_ADDR(device->sas_addr));
 433
 434                 return -ECOMM;
 435         }
 436
 437         if (task->uldd_task) {
 438                 struct ata_queued_cmd *qc;
 439
 440                 if (dev_is_sata(device)) {
 441                         qc = task->uldd_task;
 442                         scmd = qc->scsicmd;
 443                 } else {
 444                         scmd = task->uldd_task;
 445                 }
 446         }
 447
 448         if (scmd && hisi_hba->shost->nr_hw_queues) {
 449                 unsigned int dq_index;
 450                 u32 blk_tag;
 451
 452                 blk_tag = blk_mq_unique_tag(scmd->request);
 453                 dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 454                 *dq_pointer = dq = &hisi_hba->dq[dq_index];
 455         } else if (hisi_hba->shost->nr_hw_queues)  {
 456                 struct Scsi_Host *shost = hisi_hba->shost;
 457                 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 458                 int queue = qmap->mq_map[raw_smp_processor_id()];
 459
 460                 *dq_pointer = dq = &hisi_hba->dq[queue];
 461         } else {
 462                 *dq_pointer = dq = sas_dev->dq;
 463         }
 464
 465         port = to_hisi_sas_port(sas_port);
 466         if (port && !port->port_attached) {
 467                 dev_info(dev, "task prep: %s port%d not attach device\n",
 468                          (dev_is_sata(device)) ?
 469                          "SATA/STP" : "SAS",
 470                          device->port->id);
 471
 472                 return -ECOMM;
 473         }
 474
 475         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 476                               &n_elem_req);
 477         if (rc < 0)
 478                 goto prep_out;
 479
 480         if (!sas_protocol_ata(task->task_proto)) {
 481                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 482                 if (rc < 0)
 483                         goto err_out_dma_unmap;
 484         }
 485
 486         if (hisi_hba->hw->slot_index_alloc)
 487                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 488         else
 489                 rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
 490
 491         if (rc < 0)
 492                 goto err_out_dif_dma_unmap;
 493
 494         slot_idx = rc;
 495         slot = &hisi_hba->slot_info[slot_idx];
 496
 497         spin_lock(&dq->lock);
 498         wr_q_index = dq->wr_point;
 499         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 500         list_add_tail(&slot->delivery, &dq->list);
 501         spin_unlock(&dq->lock);
 502         spin_lock(&sas_dev->lock);
 503         list_add_tail(&slot->entry, &sas_dev->list);
 504         spin_unlock(&sas_dev->lock);
 505
 506         dlvry_queue = dq->id;
 507         dlvry_queue_slot = wr_q_index;
 508
 509         slot->device_id = sas_dev->device_id;
 510         slot->n_elem = n_elem;
 511         slot->n_elem_dif = n_elem_dif;
 512         slot->dlvry_queue = dlvry_queue;
 513         slot->dlvry_queue_slot = dlvry_queue_slot;
 514         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 515         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 516         slot->task = task;
 517         slot->port = port;
 518         slot->tmf = tmf;
 519         slot->is_internal = is_tmf;
 520         task->lldd_task = slot;
 521
 522         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 523         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 524         memset(hisi_sas_status_buf_addr_mem(slot), 0,
 525                sizeof(struct hisi_sas_err_record));
 526
 527         switch (task->task_proto) {
 528         case SAS_PROTOCOL_SMP:
 529                 hisi_sas_task_prep_smp(hisi_hba, slot);
 530                 break;
 531         case SAS_PROTOCOL_SSP:
 532                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 533                 break;
 534         case SAS_PROTOCOL_SATA:
 535         case SAS_PROTOCOL_STP:
 536         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 537                 hisi_sas_task_prep_ata(hisi_hba, slot);
 538                 break;
 539         default:
 540                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 541                         task->task_proto);
 542                 break;
 543         }
 544
 545         spin_lock_irqsave(&task->task_state_lock, flags);
 546         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 547         spin_unlock_irqrestore(&task->task_state_lock, flags);
 548
 549         ++(*pass);
 550         WRITE_ONCE(slot->ready, 1);
 551
 552         return 0;
 553
 554 err_out_dif_dma_unmap:
 555         if (!sas_protocol_ata(task->task_proto))
 556                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 557 err_out_dma_unmap:
 558         hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 559                            n_elem_req);
 560 prep_out:
 561         dev_err(dev, "task prep: failed[%d]!\n", rc);
 562         return rc;
 563 }
 564
 565 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 566                               bool is_tmf, struct hisi_sas_tmf_task *tmf)
 567 {
 568         u32 rc;
 569         u32 pass = 0;
 570         struct hisi_hba *hisi_hba;
 571         struct device *dev;
 572         struct domain_device *device = task->dev;
 573         struct asd_sas_port *sas_port = device->port;
 574         struct hisi_sas_dq *dq = NULL;
 575
 576         if (!sas_port) {
 577                 struct task_status_struct *ts = &task->task_status;
 578
 579                 ts->resp = SAS_TASK_UNDELIVERED;
 580                 ts->stat = SAS_PHY_DOWN;
 581                 /*
 582                  * libsas will use dev->port, should
 583                  * not call task_done for sata
 584                  */
 585                 if (device->dev_type != SAS_SATA_DEV)
 586                         task->task_done(task);
 587                 return -ECOMM;
 588         }
 589
 590         hisi_hba = dev_to_hisi_hba(device);
 591         dev = hisi_hba->dev;
 592
 593         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 594                 if (!gfpflags_allow_blocking(gfp_flags))
 595                         return -EINVAL;
 596
 597                 down(&hisi_hba->sem);
 598                 up(&hisi_hba->sem);
 599         }
 600
 601         /* protect task_prep and start_delivery sequence */
 602         rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
 603         if (rc)
 604                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 605
 606         if (likely(pass)) {
 607                 spin_lock(&dq->lock);
 608                 hisi_hba->hw->start_delivery(dq);
 609                 spin_unlock(&dq->lock);
 610         }
 611
 612         return rc;
 613 }
 614
 615 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 616 {
 617         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 618         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 619         struct sas_ha_struct *sas_ha;
 620
 621         if (!phy->phy_attached)
 622                 return;
 623
 624         if (test_bit(HISI_SAS_PM_BIT, &hisi_hba->flags) &&
 625             !sas_phy->suspended) {
 626                 dev_warn(hisi_hba->dev, "phy%d during suspend filtered out\n", phy_no);
 627                 return;
 628         }
 629
 630         sas_ha = &hisi_hba->sha;
 631         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 632
 633         if (sas_phy->phy) {
 634                 struct sas_phy *sphy = sas_phy->phy;
 635
 636                 sphy->negotiated_linkrate = sas_phy->linkrate;
 637                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 638                 sphy->maximum_linkrate_hw =
 639                         hisi_hba->hw->phy_get_max_linkrate();
 640                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 641                         sphy->minimum_linkrate = phy->minimum_linkrate;
 642
 643                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 644                         sphy->maximum_linkrate = phy->maximum_linkrate;
 645         }
 646
 647         if (phy->phy_type & PORT_TYPE_SAS) {
 648                 struct sas_identify_frame *id;
 649
 650                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 651                 id->dev_type = phy->identify.device_type;
 652                 id->initiator_bits = SAS_PROTOCOL_ALL;
 653                 id->target_bits = phy->identify.target_port_protocols;
 654         } else if (phy->phy_type & PORT_TYPE_SATA) {
 655                 /* Nothing */
 656         }
 657
 658         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 659         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 660 }
 661
 662 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 663 {
 664         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 665         struct hisi_sas_device *sas_dev = NULL;
 666         int last = hisi_hba->last_dev_id;
 667         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 668         int i;
 669
 670         spin_lock(&hisi_hba->lock);
 671         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 672                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 673                         int queue = i % hisi_hba->queue_count;
 674                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 675
 676                         hisi_hba->devices[i].device_id = i;
 677                         sas_dev = &hisi_hba->devices[i];
 678                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 679                         sas_dev->dev_type = device->dev_type;
 680                         sas_dev->hisi_hba = hisi_hba;
 681                         sas_dev->sas_device = device;
 682                         sas_dev->dq = dq;
 683                         spin_lock_init(&sas_dev->lock);
 684                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 685                         break;
 686                 }
 687                 i++;
 688         }
 689         hisi_hba->last_dev_id = i;
 690         spin_unlock(&hisi_hba->lock);
 691
 692         return sas_dev;
 693 }
 694
 695 #define HISI_SAS_DISK_RECOVER_CNT 3
 696 static int hisi_sas_init_device(struct domain_device *device)
 697 {
 698         int rc = TMF_RESP_FUNC_COMPLETE;
 699         struct scsi_lun lun;
 700         struct hisi_sas_tmf_task tmf_task;
 701         int retry = HISI_SAS_DISK_RECOVER_CNT;
 702         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 703         struct device *dev = hisi_hba->dev;
 704         struct sas_phy *local_phy;
 705
 706         switch (device->dev_type) {
 707         case SAS_END_DEVICE:
 708                 int_to_scsilun(0, &lun);
 709
 710                 tmf_task.tmf = TMF_CLEAR_TASK_SET;
 711                 while (retry-- > 0) {
 712                         rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 713                                                           &tmf_task);
 714                         if (rc == TMF_RESP_FUNC_COMPLETE) {
 715                                 hisi_sas_release_task(hisi_hba, device);
 716                                 break;
 717                         }
 718                 }
 719                 break;
 720         case SAS_SATA_DEV:
 721         case SAS_SATA_PM:
 722         case SAS_SATA_PM_PORT:
 723         case SAS_SATA_PENDING:
 724                 /*
 725                  * send HARD RESET to clear previous affiliation of
 726                  * STP target port
 727                  */
 728                 local_phy = sas_get_local_phy(device);
 729                 if (!scsi_is_sas_phy_local(local_phy) &&
 730                     !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
 731                         unsigned long deadline = ata_deadline(jiffies, 20000);
 732                         struct sata_device *sata_dev = &device->sata_dev;
 733                         struct ata_host *ata_host = sata_dev->ata_host;
 734                         struct ata_port_operations *ops = ata_host->ops;
 735                         struct ata_port *ap = sata_dev->ap;
 736                         struct ata_link *link;
 737                         unsigned int classes;
 738
 739                         ata_for_each_link(link, ap, EDGE)
 740                                 rc = ops->hardreset(link, &classes,
 741                                                     deadline);
 742                 }
 743                 sas_put_local_phy(local_phy);
 744                 if (rc) {
 745                         dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
 746                         return rc;
 747                 }
 748
 749                 while (retry-- > 0) {
 750                         rc = hisi_sas_softreset_ata_disk(device);
 751                         if (!rc)
 752                                 break;
 753                 }
 754                 break;
 755         default:
 756                 break;
 757         }
 758
 759         return rc;
 760 }
 761
 762 static int hisi_sas_dev_found(struct domain_device *device)
 763 {
 764         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 765         struct domain_device *parent_dev = device->parent;
 766         struct hisi_sas_device *sas_dev;
 767         struct device *dev = hisi_hba->dev;
 768         int rc;
 769
 770         if (hisi_hba->hw->alloc_dev)
 771                 sas_dev = hisi_hba->hw->alloc_dev(device);
 772         else
 773                 sas_dev = hisi_sas_alloc_dev(device);
 774         if (!sas_dev) {
 775                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 776                         HISI_SAS_MAX_DEVICES);
 777                 return -EINVAL;
 778         }
 779
 780         device->lldd_dev = sas_dev;
 781         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 782
 783         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 784                 int phy_no;
 785                 u8 phy_num = parent_dev->ex_dev.num_phys;
 786                 struct ex_phy *phy;
 787
 788                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 789                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 790                         if (SAS_ADDR(phy->attached_sas_addr) ==
 791                                 SAS_ADDR(device->sas_addr))
 792                                 break;
 793                 }
 794
 795                 if (phy_no == phy_num) {
 796                         dev_info(dev, "dev found: no attached "
 797                                  "dev:%016llx at ex:%016llx\n",
 798                                  SAS_ADDR(device->sas_addr),
 799                                  SAS_ADDR(parent_dev->sas_addr));
 800                         rc = -EINVAL;
 801                         goto err_out;
 802                 }
 803         }
 804
 805         dev_info(dev, "dev[%d:%x] found\n",
 806                 sas_dev->device_id, sas_dev->dev_type);
 807
 808         rc = hisi_sas_init_device(device);
 809         if (rc)
 810                 goto err_out;
 811         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 812         return 0;
 813
 814 err_out:
 815         hisi_sas_dev_gone(device);
 816         return rc;
 817 }
 818
 819 int hisi_sas_slave_configure(struct scsi_device *sdev)
 820 {
 821         struct domain_device *dev = sdev_to_domain_dev(sdev);
 822         int ret = sas_slave_configure(sdev);
 823
 824         if (ret)
 825                 return ret;
 826         if (!dev_is_sata(dev))
 827                 sas_change_queue_depth(sdev, 64);
 828
 829         return 0;
 830 }
 831 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 832
 833 void hisi_sas_scan_start(struct Scsi_Host *shost)
 834 {
 835         struct hisi_hba *hisi_hba = shost_priv(shost);
 836
 837         hisi_hba->hw->phys_init(hisi_hba);
 838 }
 839 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 840
 841 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 842 {
 843         struct hisi_hba *hisi_hba = shost_priv(shost);
 844         struct sas_ha_struct *sha = &hisi_hba->sha;
 845
 846         /* Wait for PHY up interrupt to occur */
 847         if (time < HZ)
 848                 return 0;
 849
 850         sas_drain_work(sha);
 851         return 1;
 852 }
 853 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 854
 855 static void hisi_sas_phyup_work(struct work_struct *work)
 856 {
 857         struct hisi_sas_phy *phy =
 858                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
 859         struct hisi_hba *hisi_hba = phy->hisi_hba;
 860         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 861         int phy_no = sas_phy->id;
 862
 863         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 864                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 865         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 866 }
 867
 868 static void hisi_sas_linkreset_work(struct work_struct *work)
 869 {
 870         struct hisi_sas_phy *phy =
 871                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 872         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 873
 874         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 875 }
 876
 877 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 878         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 879         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 880 };
 881
 882 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 883                                 enum hisi_sas_phy_event event)
 884 {
 885         struct hisi_hba *hisi_hba = phy->hisi_hba;
 886
 887         if (WARN_ON(event >= HISI_PHYES_NUM))
 888                 return false;
 889
 890         return queue_work(hisi_hba->wq, &phy->works[event]);
 891 }
 892 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 893
 894 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 895 {
 896         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 897         struct hisi_hba *hisi_hba = phy->hisi_hba;
 898         struct device *dev = hisi_hba->dev;
 899         int phy_no = phy->sas_phy.id;
 900
 901         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 902         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 903 }
 904
 905 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 906 {
 907         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 908         struct device *dev = hisi_hba->dev;
 909
 910         dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 911         if (phy->phy_attached)
 912                 return;
 913
 914         if (!timer_pending(&phy->timer)) {
 915                 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
 916                 add_timer(&phy->timer);
 917         }
 918 }
 919 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 920
 921 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 922 {
 923         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 924         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 925         int i;
 926
 927         phy->hisi_hba = hisi_hba;
 928         phy->port = NULL;
 929         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 930         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 931         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 932         sas_phy->class = SAS;
 933         sas_phy->iproto = SAS_PROTOCOL_ALL;
 934         sas_phy->tproto = 0;
 935         sas_phy->type = PHY_TYPE_PHYSICAL;
 936         sas_phy->role = PHY_ROLE_INITIATOR;
 937         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 938         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 939         sas_phy->id = phy_no;
 940         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 941         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 942         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 943         sas_phy->lldd_phy = phy;
 944
 945         for (i = 0; i < HISI_PHYES_NUM; i++)
 946                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 947
 948         spin_lock_init(&phy->lock);
 949
 950         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 951 }
 952
 953 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
 954 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
 955 {
 956         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 957         struct asd_sas_phy *aphy = &phy->sas_phy;
 958         struct sas_phy *sphy = aphy->phy;
 959         unsigned long flags;
 960
 961         spin_lock_irqsave(&phy->lock, flags);
 962
 963         if (enable) {
 964                 /* We may have been enabled already; if so, don't touch */
 965                 if (!phy->enable)
 966                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 967                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
 968         } else {
 969                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
 970                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 971         }
 972         phy->enable = enable;
 973         spin_unlock_irqrestore(&phy->lock, flags);
 974 }
 975 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
 976
 977 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 978 {
 979         struct sas_ha_struct *sas_ha = sas_phy->ha;
 980         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 981         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 982         struct asd_sas_port *sas_port = sas_phy->port;
 983         struct hisi_sas_port *port;
 984         unsigned long flags;
 985
 986         if (!sas_port)
 987                 return;
 988
 989         port = to_hisi_sas_port(sas_port);
 990         spin_lock_irqsave(&hisi_hba->lock, flags);
 991         port->port_attached = 1;
 992         port->id = phy->port_id;
 993         phy->port = port;
 994         sas_port->lldd_port = port;
 995         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 996 }
 997
 998 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
 999                                      struct hisi_sas_slot *slot)
1000 {
1001         if (task) {
1002                 unsigned long flags;
1003                 struct task_status_struct *ts;
1004
1005                 ts = &task->task_status;
1006
1007                 ts->resp = SAS_TASK_COMPLETE;
1008                 ts->stat = SAS_ABORTED_TASK;
1009                 spin_lock_irqsave(&task->task_state_lock, flags);
1010                 task->task_state_flags &=
1011                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1012                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1013                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1014                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1015         }
1016
1017         hisi_sas_slot_task_free(hisi_hba, task, slot);
1018 }
1019
1020 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1021                         struct domain_device *device)
1022 {
1023         struct hisi_sas_slot *slot, *slot2;
1024         struct hisi_sas_device *sas_dev = device->lldd_dev;
1025
1026         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1027                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1028 }
1029
1030 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1031 {
1032         struct hisi_sas_device *sas_dev;
1033         struct domain_device *device;
1034         int i;
1035
1036         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1037                 sas_dev = &hisi_hba->devices[i];
1038                 device = sas_dev->sas_device;
1039
1040                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1041                     !device)
1042                         continue;
1043
1044                 hisi_sas_release_task(hisi_hba, device);
1045         }
1046 }
1047 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1048
1049 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1050                                 struct domain_device *device)
1051 {
1052         if (hisi_hba->hw->dereg_device)
1053                 hisi_hba->hw->dereg_device(hisi_hba, device);
1054 }
1055
1056 static void hisi_sas_dev_gone(struct domain_device *device)
1057 {
1058         struct hisi_sas_device *sas_dev = device->lldd_dev;
1059         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1060         struct device *dev = hisi_hba->dev;
1061         int ret = 0;
1062
1063         dev_info(dev, "dev[%d:%x] is gone\n",
1064                  sas_dev->device_id, sas_dev->dev_type);
1065
1066         down(&hisi_hba->sem);
1067         if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1068                 hisi_sas_internal_task_abort(hisi_hba, device,
1069                                              HISI_SAS_INT_ABT_DEV, 0);
1070
1071                 hisi_sas_dereg_device(hisi_hba, device);
1072
1073                 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1074                 device->lldd_dev = NULL;
1075         }
1076
1077         if (hisi_hba->hw->free_device)
1078                 hisi_hba->hw->free_device(sas_dev);
1079
1080         /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1081         if (!ret)
1082                 sas_dev->dev_type = SAS_PHY_UNUSED;
1083         sas_dev->sas_device = NULL;
1084         up(&hisi_hba->sem);
1085 }
1086
1087 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1088 {
1089         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1090 }
1091
1092 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1093                         struct sas_phy_linkrates *r)
1094 {
1095         struct sas_phy_linkrates _r;
1096
1097         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1098         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1099         enum sas_linkrate min, max;
1100
1101         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1102                 return -EINVAL;
1103
1104         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1105                 max = sas_phy->phy->maximum_linkrate;
1106                 min = r->minimum_linkrate;
1107         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1108                 max = r->maximum_linkrate;
1109                 min = sas_phy->phy->minimum_linkrate;
1110         } else
1111                 return -EINVAL;
1112
1113         _r.maximum_linkrate = max;
1114         _r.minimum_linkrate = min;
1115
1116         sas_phy->phy->maximum_linkrate = max;
1117         sas_phy->phy->minimum_linkrate = min;
1118
1119         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1120         msleep(100);
1121         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1122         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1123
1124         return 0;
1125 }
1126
1127 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1128                                 void *funcdata)
1129 {
1130         struct sas_ha_struct *sas_ha = sas_phy->ha;
1131         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1132         int phy_no = sas_phy->id;
1133
1134         switch (func) {
1135         case PHY_FUNC_HARD_RESET:
1136                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1137                 break;
1138
1139         case PHY_FUNC_LINK_RESET:
1140                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1141                 msleep(100);
1142                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1143                 break;
1144
1145         case PHY_FUNC_DISABLE:
1146                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1147                 break;
1148
1149         case PHY_FUNC_SET_LINK_RATE:
1150                 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1151         case PHY_FUNC_GET_EVENTS:
1152                 if (hisi_hba->hw->get_events) {
1153                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1154                         break;
1155                 }
1156                 fallthrough;
1157         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1158         default:
1159                 return -EOPNOTSUPP;
1160         }
1161         return 0;
1162 }
1163
1164 static void hisi_sas_task_done(struct sas_task *task)
1165 {
1166         del_timer(&task->slow_task->timer);
1167         complete(&task->slow_task->completion);
1168 }
1169
1170 static void hisi_sas_tmf_timedout(struct timer_list *t)
1171 {
1172         struct sas_task_slow *slow = from_timer(slow, t, timer);
1173         struct sas_task *task = slow->task;
1174         unsigned long flags;
1175         bool is_completed = true;
1176
1177         spin_lock_irqsave(&task->task_state_lock, flags);
1178         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1179                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1180                 is_completed = false;
1181         }
1182         spin_unlock_irqrestore(&task->task_state_lock, flags);
1183
1184         if (!is_completed)
1185                 complete(&task->slow_task->completion);
1186 }
1187
1188 #define TASK_TIMEOUT 20
1189 #define TASK_RETRY 3
1190 #define INTERNAL_ABORT_TIMEOUT 6
1191 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1192                                            void *parameter, u32 para_len,
1193                                            struct hisi_sas_tmf_task *tmf)
1194 {
1195         struct hisi_sas_device *sas_dev = device->lldd_dev;
1196         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1197         struct device *dev = hisi_hba->dev;
1198         struct sas_task *task;
1199         int res, retry;
1200
1201         for (retry = 0; retry < TASK_RETRY; retry++) {
1202                 task = sas_alloc_slow_task(GFP_KERNEL);
1203                 if (!task)
1204                         return -ENOMEM;
1205
1206                 task->dev = device;
1207                 task->task_proto = device->tproto;
1208
1209                 if (dev_is_sata(device)) {
1210                         task->ata_task.device_control_reg_update = 1;
1211                         memcpy(&task->ata_task.fis, parameter, para_len);
1212                 } else {
1213                         memcpy(&task->ssp_task, parameter, para_len);
1214                 }
1215                 task->task_done = hisi_sas_task_done;
1216
1217                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1218                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1219                 add_timer(&task->slow_task->timer);
1220
1221                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1222
1223                 if (res) {
1224                         del_timer(&task->slow_task->timer);
1225                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1226                                 res);
1227                         goto ex_err;
1228                 }
1229
1230                 wait_for_completion(&task->slow_task->completion);
1231                 res = TMF_RESP_FUNC_FAILED;
1232                 /* Even TMF timed out, return direct. */
1233                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1234                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1235                                 struct hisi_sas_slot *slot = task->lldd_task;
1236
1237                                 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1238                                 if (slot) {
1239                                         struct hisi_sas_cq *cq =
1240                                                &hisi_hba->cq[slot->dlvry_queue];
1241                                         /*
1242                                          * sync irq to avoid free'ing task
1243                                          * before using task in IO completion
1244                                          */
1245                                         synchronize_irq(cq->irq_no);
1246                                         slot->task = NULL;
1247                                 }
1248
1249                                 goto ex_err;
1250                         } else
1251                                 dev_err(dev, "abort tmf: TMF task timeout\n");
1252                 }
1253
1254                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1255                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1256                         res = TMF_RESP_FUNC_COMPLETE;
1257                         break;
1258                 }
1259
1260                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1261                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1262                         res = TMF_RESP_FUNC_SUCC;
1263                         break;
1264                 }
1265
1266                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1267                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1268                         /* no error, but return the number of bytes of
1269                          * underrun
1270                          */
1271                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1272                                  SAS_ADDR(device->sas_addr),
1273                                  task->task_status.resp,
1274                                  task->task_status.stat);
1275                         res = task->task_status.residual;
1276                         break;
1277                 }
1278
1279                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1280                         task->task_status.stat == SAS_DATA_OVERRUN) {
1281                         dev_warn(dev, "abort tmf: blocked task error\n");
1282                         res = -EMSGSIZE;
1283                         break;
1284                 }
1285
1286                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1287                     task->task_status.stat == SAS_OPEN_REJECT) {
1288                         dev_warn(dev, "abort tmf: open reject failed\n");
1289                         res = -EIO;
1290                 } else {
1291                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1292                                  SAS_ADDR(device->sas_addr),
1293                                  task->task_status.resp,
1294                                  task->task_status.stat);
1295                 }
1296                 sas_free_task(task);
1297                 task = NULL;
1298         }
1299 ex_err:
1300         if (retry == TASK_RETRY)
1301                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1302         sas_free_task(task);
1303         return res;
1304 }
1305
1306 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1307                 bool reset, int pmp, u8 *fis)
1308 {
1309         struct ata_taskfile tf;
1310
1311         ata_tf_init(dev, &tf);
1312         if (reset)
1313                 tf.ctl |= ATA_SRST;
1314         else
1315                 tf.ctl &= ~ATA_SRST;
1316         tf.command = ATA_CMD_DEV_RESET;
1317         ata_tf_to_fis(&tf, pmp, 0, fis);
1318 }
1319
1320 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1321 {
1322         u8 fis[20] = {0};
1323         struct ata_port *ap = device->sata_dev.ap;
1324         struct ata_link *link;
1325         int rc = TMF_RESP_FUNC_FAILED;
1326         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1327         struct device *dev = hisi_hba->dev;
1328         int s = sizeof(struct host_to_dev_fis);
1329
1330         ata_for_each_link(link, ap, EDGE) {
1331                 int pmp = sata_srst_pmp(link);
1332
1333                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1334                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1335                 if (rc != TMF_RESP_FUNC_COMPLETE)
1336                         break;
1337         }
1338
1339         if (rc == TMF_RESP_FUNC_COMPLETE) {
1340                 ata_for_each_link(link, ap, EDGE) {
1341                         int pmp = sata_srst_pmp(link);
1342
1343                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1344                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
1345                                                              s, NULL);
1346                         if (rc != TMF_RESP_FUNC_COMPLETE)
1347                                 dev_err(dev, "ata disk de-reset failed\n");
1348                 }
1349         } else {
1350                 dev_err(dev, "ata disk reset failed\n");
1351         }
1352
1353         if (rc == TMF_RESP_FUNC_COMPLETE)
1354                 hisi_sas_release_task(hisi_hba, device);
1355
1356         return rc;
1357 }
1358
1359 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1360                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
1361 {
1362         struct sas_ssp_task ssp_task;
1363
1364         if (!(device->tproto & SAS_PROTOCOL_SSP))
1365                 return TMF_RESP_FUNC_ESUPP;
1366
1367         memcpy(ssp_task.LUN, lun, 8);
1368
1369         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1370                                 sizeof(ssp_task), tmf);
1371 }
1372
1373 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1374 {
1375         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1376         int i;
1377
1378         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1379                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1380                 struct domain_device *device = sas_dev->sas_device;
1381                 struct asd_sas_port *sas_port;
1382                 struct hisi_sas_port *port;
1383                 struct hisi_sas_phy *phy = NULL;
1384                 struct asd_sas_phy *sas_phy;
1385
1386                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1387                                 || !device || !device->port)
1388                         continue;
1389
1390                 sas_port = device->port;
1391                 port = to_hisi_sas_port(sas_port);
1392
1393                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1394                         if (state & BIT(sas_phy->id)) {
1395                                 phy = sas_phy->lldd_phy;
1396                                 break;
1397                         }
1398
1399                 if (phy) {
1400                         port->id = phy->port_id;
1401
1402                         /* Update linkrate of directly attached device. */
1403                         if (!device->parent)
1404                                 device->linkrate = phy->sas_phy.linkrate;
1405
1406                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1407                 } else
1408                         port->id = 0xff;
1409         }
1410 }
1411
1412 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1413 {
1414         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1415         struct asd_sas_port *_sas_port = NULL;
1416         int phy_no;
1417
1418         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1419                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1420                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1421                 struct asd_sas_port *sas_port = sas_phy->port;
1422                 bool do_port_check = _sas_port != sas_port;
1423
1424                 if (!sas_phy->phy->enabled)
1425                         continue;
1426
1427                 /* Report PHY state change to libsas */
1428                 if (state & BIT(phy_no)) {
1429                         if (do_port_check && sas_port && sas_port->port_dev) {
1430                                 struct domain_device *dev = sas_port->port_dev;
1431
1432                                 _sas_port = sas_port;
1433
1434                                 if (dev_is_expander(dev->dev_type))
1435                                         sas_ha->notify_port_event(sas_phy,
1436                                                         PORTE_BROADCAST_RCVD);
1437                         }
1438                 } else {
1439                         hisi_sas_phy_down(hisi_hba, phy_no, 0);
1440                 }
1441         }
1442 }
1443
1444 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1445 {
1446         struct hisi_sas_device *sas_dev;
1447         struct domain_device *device;
1448         int i;
1449
1450         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1451                 sas_dev = &hisi_hba->devices[i];
1452                 device = sas_dev->sas_device;
1453
1454                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1455                         continue;
1456
1457                 hisi_sas_init_device(device);
1458         }
1459 }
1460
1461 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1462                                              struct asd_sas_port *sas_port,
1463                                              struct domain_device *device)
1464 {
1465         struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1466         struct ata_port *ap = device->sata_dev.ap;
1467         struct device *dev = hisi_hba->dev;
1468         int s = sizeof(struct host_to_dev_fis);
1469         int rc = TMF_RESP_FUNC_FAILED;
1470         struct asd_sas_phy *sas_phy;
1471         struct ata_link *link;
1472         u8 fis[20] = {0};
1473         u32 state;
1474
1475         state = hisi_hba->hw->get_phys_state(hisi_hba);
1476         list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1477                 if (!(state & BIT(sas_phy->id)))
1478                         continue;
1479
1480                 ata_for_each_link(link, ap, EDGE) {
1481                         int pmp = sata_srst_pmp(link);
1482
1483                         tmf_task.phy_id = sas_phy->id;
1484                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1485                         rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1486                                                              &tmf_task);
1487                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1488                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1489                                         sas_phy->id, rc);
1490                                 break;
1491                         }
1492                 }
1493         }
1494 }
1495
1496 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1497 {
1498         struct device *dev = hisi_hba->dev;
1499         int port_no, rc, i;
1500
1501         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1502                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1503                 struct domain_device *device = sas_dev->sas_device;
1504
1505                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1506                         continue;
1507
1508                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1509                                                   HISI_SAS_INT_ABT_DEV, 0);
1510                 if (rc < 0)
1511                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1512         }
1513
1514         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1515                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1516                 struct asd_sas_port *sas_port = &port->sas_port;
1517                 struct domain_device *port_dev = sas_port->port_dev;
1518                 struct domain_device *device;
1519
1520                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1521                         continue;
1522
1523                 /* Try to find a SATA device */
1524                 list_for_each_entry(device, &sas_port->dev_list,
1525                                     dev_list_node) {
1526                         if (dev_is_sata(device)) {
1527                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1528                                                                  sas_port,
1529                                                                  device);
1530                                 break;
1531                         }
1532                 }
1533         }
1534 }
1535
1536 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1537 {
1538         struct Scsi_Host *shost = hisi_hba->shost;
1539
1540         down(&hisi_hba->sem);
1541         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1542
1543         scsi_block_requests(shost);
1544         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1545
1546         if (timer_pending(&hisi_hba->timer))
1547                 del_timer_sync(&hisi_hba->timer);
1548
1549         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1550 }
1551 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1552
1553 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1554 {
1555         struct Scsi_Host *shost = hisi_hba->shost;
1556
1557         /* Init and wait for PHYs to come up and all libsas event finished. */
1558         hisi_hba->hw->phys_init(hisi_hba);
1559         msleep(1000);
1560         hisi_sas_refresh_port_id(hisi_hba);
1561         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1562
1563         if (hisi_hba->reject_stp_links_msk)
1564                 hisi_sas_terminate_stp_reject(hisi_hba);
1565         hisi_sas_reset_init_all_devices(hisi_hba);
1566         up(&hisi_hba->sem);
1567         scsi_unblock_requests(shost);
1568         clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1569
1570         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1571 }
1572 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1573
1574 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1575 {
1576         struct device *dev = hisi_hba->dev;
1577         struct Scsi_Host *shost = hisi_hba->shost;
1578         int rc;
1579
1580         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
1581                 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1582
1583         if (!hisi_hba->hw->soft_reset)
1584                 return -1;
1585
1586         if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1587                 return -1;
1588
1589         dev_info(dev, "controller resetting...\n");
1590         hisi_sas_controller_reset_prepare(hisi_hba);
1591
1592         rc = hisi_hba->hw->soft_reset(hisi_hba);
1593         if (rc) {
1594                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1595                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1596                 up(&hisi_hba->sem);
1597                 scsi_unblock_requests(shost);
1598                 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1599                 return rc;
1600         }
1601
1602         hisi_sas_controller_reset_done(hisi_hba);
1603         dev_info(dev, "controller reset complete\n");
1604
1605         return 0;
1606 }
1607
1608 static int hisi_sas_abort_task(struct sas_task *task)
1609 {
1610         struct scsi_lun lun;
1611         struct hisi_sas_tmf_task tmf_task;
1612         struct domain_device *device = task->dev;
1613         struct hisi_sas_device *sas_dev = device->lldd_dev;
1614         struct hisi_hba *hisi_hba;
1615         struct device *dev;
1616         int rc = TMF_RESP_FUNC_FAILED;
1617         unsigned long flags;
1618
1619         if (!sas_dev)
1620                 return TMF_RESP_FUNC_FAILED;
1621
1622         hisi_hba = dev_to_hisi_hba(task->dev);
1623         dev = hisi_hba->dev;
1624
1625         spin_lock_irqsave(&task->task_state_lock, flags);
1626         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1627                 struct hisi_sas_slot *slot = task->lldd_task;
1628                 struct hisi_sas_cq *cq;
1629
1630                 if (slot) {
1631                         /*
1632                          * sync irq to avoid free'ing task
1633                          * before using task in IO completion
1634                          */
1635                         cq = &hisi_hba->cq[slot->dlvry_queue];
1636                         synchronize_irq(cq->irq_no);
1637                 }
1638                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1639                 rc = TMF_RESP_FUNC_COMPLETE;
1640                 goto out;
1641         }
1642         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1643         spin_unlock_irqrestore(&task->task_state_lock, flags);
1644
1645         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1646                 struct scsi_cmnd *cmnd = task->uldd_task;
1647                 struct hisi_sas_slot *slot = task->lldd_task;
1648                 u16 tag = slot->idx;
1649                 int rc2;
1650
1651                 int_to_scsilun(cmnd->device->lun, &lun);
1652                 tmf_task.tmf = TMF_ABORT_TASK;
1653                 tmf_task.tag_of_task_to_be_managed = tag;
1654
1655                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1656                                                   &tmf_task);
1657
1658                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1659                                                    HISI_SAS_INT_ABT_CMD, tag);
1660                 if (rc2 < 0) {
1661                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1662                         return TMF_RESP_FUNC_FAILED;
1663                 }
1664
1665                 /*
1666                  * If the TMF finds that the IO is not in the device and also
1667                  * the internal abort does not succeed, then it is safe to
1668                  * free the slot.
1669                  * Note: if the internal abort succeeds then the slot
1670                  * will have already been completed
1671                  */
1672                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1673                         if (task->lldd_task)
1674                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1675                 }
1676         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1677                 task->task_proto & SAS_PROTOCOL_STP) {
1678                 if (task->dev->dev_type == SAS_SATA_DEV) {
1679                         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1680                                                           HISI_SAS_INT_ABT_DEV,
1681                                                           0);
1682                         if (rc < 0) {
1683                                 dev_err(dev, "abort task: internal abort failed\n");
1684                                 goto out;
1685                         }
1686                         hisi_sas_dereg_device(hisi_hba, device);
1687                         rc = hisi_sas_softreset_ata_disk(device);
1688                 }
1689         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1690                 /* SMP */
1691                 struct hisi_sas_slot *slot = task->lldd_task;
1692                 u32 tag = slot->idx;
1693                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1694
1695                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1696                                                   HISI_SAS_INT_ABT_CMD, tag);
1697                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1698                                         task->lldd_task) {
1699                         /*
1700                          * sync irq to avoid free'ing task
1701                          * before using task in IO completion
1702                          */
1703                         synchronize_irq(cq->irq_no);
1704                         slot->task = NULL;
1705                 }
1706         }
1707
1708 out:
1709         if (rc != TMF_RESP_FUNC_COMPLETE)
1710                 dev_notice(dev, "abort task: rc=%d\n", rc);
1711         return rc;
1712 }
1713
1714 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1715 {
1716         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1717         struct device *dev = hisi_hba->dev;
1718         struct hisi_sas_tmf_task tmf_task;
1719         int rc;
1720
1721         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1722                                           HISI_SAS_INT_ABT_DEV, 0);
1723         if (rc < 0) {
1724                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1725                 return TMF_RESP_FUNC_FAILED;
1726         }
1727         hisi_sas_dereg_device(hisi_hba, device);
1728
1729         tmf_task.tmf = TMF_ABORT_TASK_SET;
1730         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1731
1732         if (rc == TMF_RESP_FUNC_COMPLETE)
1733                 hisi_sas_release_task(hisi_hba, device);
1734
1735         return rc;
1736 }
1737
1738 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1739 {
1740         struct hisi_sas_tmf_task tmf_task;
1741         int rc;
1742
1743         tmf_task.tmf = TMF_CLEAR_ACA;
1744         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1745
1746         return rc;
1747 }
1748
1749 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1750 {
1751         struct sas_phy *local_phy = sas_get_local_phy(device);
1752         struct hisi_sas_device *sas_dev = device->lldd_dev;
1753         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1754         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1755         DECLARE_COMPLETION_ONSTACK(phyreset);
1756         int rc, reset_type;
1757
1758         if (!local_phy->enabled) {
1759                 sas_put_local_phy(local_phy);
1760                 return -ENODEV;
1761         }
1762
1763         if (scsi_is_sas_phy_local(local_phy)) {
1764                 struct asd_sas_phy *sas_phy =
1765                         sas_ha->sas_phy[local_phy->number];
1766                 struct hisi_sas_phy *phy =
1767                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1768                 phy->in_reset = 1;
1769                 phy->reset_completion = &phyreset;
1770         }
1771
1772         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1773                       !dev_is_sata(device)) ? true : false;
1774
1775         rc = sas_phy_reset(local_phy, reset_type);
1776         sas_put_local_phy(local_phy);
1777
1778         if (scsi_is_sas_phy_local(local_phy)) {
1779                 struct asd_sas_phy *sas_phy =
1780                         sas_ha->sas_phy[local_phy->number];
1781                 struct hisi_sas_phy *phy =
1782                         container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1783                 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1784                 unsigned long flags;
1785
1786                 spin_lock_irqsave(&phy->lock, flags);
1787                 phy->reset_completion = NULL;
1788                 phy->in_reset = 0;
1789                 spin_unlock_irqrestore(&phy->lock, flags);
1790
1791                 /* report PHY down if timed out */
1792                 if (!ret)
1793                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1794         } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1795                 /*
1796                  * If in init state, we rely on caller to wait for link to be
1797                  * ready; otherwise, except phy reset is fail, delay.
1798                  */
1799                 if (!rc)
1800                         msleep(2000);
1801         }
1802
1803         return rc;
1804 }
1805
1806 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1807 {
1808         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1809         struct device *dev = hisi_hba->dev;
1810         int rc;
1811
1812         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1813                                           HISI_SAS_INT_ABT_DEV, 0);
1814         if (rc < 0) {
1815                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1816                 return TMF_RESP_FUNC_FAILED;
1817         }
1818         hisi_sas_dereg_device(hisi_hba, device);
1819
1820         if (dev_is_sata(device)) {
1821                 rc = hisi_sas_softreset_ata_disk(device);
1822                 if (rc == TMF_RESP_FUNC_FAILED)
1823                         return TMF_RESP_FUNC_FAILED;
1824         }
1825
1826         rc = hisi_sas_debug_I_T_nexus_reset(device);
1827
1828         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1829                 hisi_sas_release_task(hisi_hba, device);
1830
1831         return rc;
1832 }
1833
1834 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1835 {
1836         struct hisi_sas_device *sas_dev = device->lldd_dev;
1837         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1838         struct device *dev = hisi_hba->dev;
1839         int rc = TMF_RESP_FUNC_FAILED;
1840
1841         /* Clear internal IO and then lu reset */
1842         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1843                                           HISI_SAS_INT_ABT_DEV, 0);
1844         if (rc < 0) {
1845                 dev_err(dev, "lu_reset: internal abort failed\n");
1846                 goto out;
1847         }
1848         hisi_sas_dereg_device(hisi_hba, device);
1849
1850         if (dev_is_sata(device)) {
1851                 struct sas_phy *phy;
1852
1853                 phy = sas_get_local_phy(device);
1854
1855                 rc = sas_phy_reset(phy, true);
1856
1857                 if (rc == 0)
1858                         hisi_sas_release_task(hisi_hba, device);
1859                 sas_put_local_phy(phy);
1860         } else {
1861                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1862
1863                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1864                 if (rc == TMF_RESP_FUNC_COMPLETE)
1865                         hisi_sas_release_task(hisi_hba, device);
1866         }
1867 out:
1868         if (rc != TMF_RESP_FUNC_COMPLETE)
1869                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1870                              sas_dev->device_id, rc);
1871         return rc;
1872 }
1873
1874 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1875 {
1876         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1877         struct device *dev = hisi_hba->dev;
1878         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1879         int rc, i;
1880
1881         queue_work(hisi_hba->wq, &r.work);
1882         wait_for_completion(r.completion);
1883         if (!r.done)
1884                 return TMF_RESP_FUNC_FAILED;
1885
1886         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1887                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1888                 struct domain_device *device = sas_dev->sas_device;
1889
1890                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1891                     dev_is_expander(device->dev_type))
1892                         continue;
1893
1894                 rc = hisi_sas_debug_I_T_nexus_reset(device);
1895                 if (rc != TMF_RESP_FUNC_COMPLETE)
1896                         dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1897                                  sas_dev->device_id, rc);
1898         }
1899
1900         hisi_sas_release_tasks(hisi_hba);
1901
1902         return TMF_RESP_FUNC_COMPLETE;
1903 }
1904
1905 static int hisi_sas_query_task(struct sas_task *task)
1906 {
1907         struct scsi_lun lun;
1908         struct hisi_sas_tmf_task tmf_task;
1909         int rc = TMF_RESP_FUNC_FAILED;
1910
1911         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1912                 struct scsi_cmnd *cmnd = task->uldd_task;
1913                 struct domain_device *device = task->dev;
1914                 struct hisi_sas_slot *slot = task->lldd_task;
1915                 u32 tag = slot->idx;
1916
1917                 int_to_scsilun(cmnd->device->lun, &lun);
1918                 tmf_task.tmf = TMF_QUERY_TASK;
1919                 tmf_task.tag_of_task_to_be_managed = tag;
1920
1921                 rc = hisi_sas_debug_issue_ssp_tmf(device,
1922                                                   lun.scsi_lun,
1923                                                   &tmf_task);
1924                 switch (rc) {
1925                 /* The task is still in Lun, release it then */
1926                 case TMF_RESP_FUNC_SUCC:
1927                 /* The task is not in Lun or failed, reset the phy */
1928                 case TMF_RESP_FUNC_FAILED:
1929                 case TMF_RESP_FUNC_COMPLETE:
1930                         break;
1931                 default:
1932                         rc = TMF_RESP_FUNC_FAILED;
1933                         break;
1934                 }
1935         }
1936         return rc;
1937 }
1938
1939 static int
1940 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1941                                   struct sas_task *task, int abort_flag,
1942                                   int task_tag, struct hisi_sas_dq *dq)
1943 {
1944         struct domain_device *device = task->dev;
1945         struct hisi_sas_device *sas_dev = device->lldd_dev;
1946         struct device *dev = hisi_hba->dev;
1947         struct hisi_sas_port *port;
1948         struct hisi_sas_slot *slot;
1949         struct asd_sas_port *sas_port = device->port;
1950         struct hisi_sas_cmd_hdr *cmd_hdr_base;
1951         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1952         unsigned long flags;
1953         int wr_q_index;
1954
1955         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1956                 return -EINVAL;
1957
1958         if (!device->port)
1959                 return -1;
1960
1961         port = to_hisi_sas_port(sas_port);
1962
1963         /* simply get a slot and send abort command */
1964         rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1965         if (rc < 0)
1966                 goto err_out;
1967
1968         slot_idx = rc;
1969         slot = &hisi_hba->slot_info[slot_idx];
1970
1971         spin_lock(&dq->lock);
1972         wr_q_index = dq->wr_point;
1973         dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
1974         list_add_tail(&slot->delivery, &dq->list);
1975         spin_unlock(&dq->lock);
1976         spin_lock(&sas_dev->lock);
1977         list_add_tail(&slot->entry, &sas_dev->list);
1978         spin_unlock(&sas_dev->lock);
1979
1980         dlvry_queue = dq->id;
1981         dlvry_queue_slot = wr_q_index;
1982
1983         slot->device_id = sas_dev->device_id;
1984         slot->n_elem = n_elem;
1985         slot->dlvry_queue = dlvry_queue;
1986         slot->dlvry_queue_slot = dlvry_queue_slot;
1987         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1988         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1989         slot->task = task;
1990         slot->port = port;
1991         slot->is_internal = true;
1992         task->lldd_task = slot;
1993
1994         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1995         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1996         memset(hisi_sas_status_buf_addr_mem(slot), 0,
1997                sizeof(struct hisi_sas_err_record));
1998
1999         hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
2000                                       abort_flag, task_tag);
2001
2002         spin_lock_irqsave(&task->task_state_lock, flags);
2003         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
2004         spin_unlock_irqrestore(&task->task_state_lock, flags);
2005         WRITE_ONCE(slot->ready, 1);
2006         /* send abort command to the chip */
2007         spin_lock(&dq->lock);
2008         hisi_hba->hw->start_delivery(dq);
2009         spin_unlock(&dq->lock);
2010
2011         return 0;
2012
2013 err_out:
2014         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2015
2016         return rc;
2017 }
2018
2019 /**
2020  * _hisi_sas_internal_task_abort -- execute an internal
2021  * abort command for single IO command or a device
2022  * @hisi_hba: host controller struct
2023  * @device: domain device
2024  * @abort_flag: mode of operation, device or single IO
2025  * @tag: tag of IO to be aborted (only relevant to single
2026  *       IO mode)
2027  * @dq: delivery queue for this internal abort command
2028  */
2029 static int
2030 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2031                               struct domain_device *device, int abort_flag,
2032                               int tag, struct hisi_sas_dq *dq)
2033 {
2034         struct sas_task *task;
2035         struct hisi_sas_device *sas_dev = device->lldd_dev;
2036         struct device *dev = hisi_hba->dev;
2037         int res;
2038
2039         /*
2040          * The interface is not realized means this HW don't support internal
2041          * abort, or don't need to do internal abort. Then here, we return
2042          * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2043          * the internal abort has been executed and returned CQ.
2044          */
2045         if (!hisi_hba->hw->prep_abort)
2046                 return TMF_RESP_FUNC_FAILED;
2047
2048         task = sas_alloc_slow_task(GFP_KERNEL);
2049         if (!task)
2050                 return -ENOMEM;
2051
2052         task->dev = device;
2053         task->task_proto = device->tproto;
2054         task->task_done = hisi_sas_task_done;
2055         task->slow_task->timer.function = hisi_sas_tmf_timedout;
2056         task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2057         add_timer(&task->slow_task->timer);
2058
2059         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2060                                                 task, abort_flag, tag, dq);
2061         if (res) {
2062                 del_timer(&task->slow_task->timer);
2063                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2064                         res);
2065                 goto exit;
2066         }
2067         wait_for_completion(&task->slow_task->completion);
2068         res = TMF_RESP_FUNC_FAILED;
2069
2070         /* Internal abort timed out */
2071         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2072                 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct)
2073                         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
2074
2075                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2076                         struct hisi_sas_slot *slot = task->lldd_task;
2077
2078                         if (slot) {
2079                                 struct hisi_sas_cq *cq =
2080                                         &hisi_hba->cq[slot->dlvry_queue];
2081                                 /*
2082                                  * sync irq to avoid free'ing task
2083                                  * before using task in IO completion
2084                                  */
2085                                 synchronize_irq(cq->irq_no);
2086                                 slot->task = NULL;
2087                         }
2088                         dev_err(dev, "internal task abort: timeout and not done.\n");
2089
2090                         res = -EIO;
2091                         goto exit;
2092                 } else
2093                         dev_err(dev, "internal task abort: timeout.\n");
2094         }
2095
2096         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2097                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2098                 res = TMF_RESP_FUNC_COMPLETE;
2099                 goto exit;
2100         }
2101
2102         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2103                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2104                 res = TMF_RESP_FUNC_SUCC;
2105                 goto exit;
2106         }
2107
2108 exit:
2109         dev_dbg(dev, "internal task abort: task to dev %016llx task=%pK resp: 0x%x sts 0x%x\n",
2110                 SAS_ADDR(device->sas_addr), task,
2111                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2112                 task->task_status.stat);
2113         sas_free_task(task);
2114
2115         return res;
2116 }
2117
2118 static int
2119 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2120                              struct domain_device *device,
2121                              int abort_flag, int tag)
2122 {
2123         struct hisi_sas_slot *slot;
2124         struct device *dev = hisi_hba->dev;
2125         struct hisi_sas_dq *dq;
2126         int i, rc;
2127
2128         switch (abort_flag) {
2129         case HISI_SAS_INT_ABT_CMD:
2130                 slot = &hisi_hba->slot_info[tag];
2131                 dq = &hisi_hba->dq[slot->dlvry_queue];
2132                 return _hisi_sas_internal_task_abort(hisi_hba, device,
2133                                                      abort_flag, tag, dq);
2134         case HISI_SAS_INT_ABT_DEV:
2135                 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2136                         struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2137                         const struct cpumask *mask = cq->irq_mask;
2138
2139                         if (mask && !cpumask_intersects(cpu_online_mask, mask))
2140                                 continue;
2141                         dq = &hisi_hba->dq[i];
2142                         rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2143                                                            abort_flag, tag,
2144                                                            dq);
2145                         if (rc)
2146                                 return rc;
2147                 }
2148                 break;
2149         default:
2150                 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2151                         abort_flag);
2152                 return -EINVAL;
2153         }
2154
2155         return 0;
2156 }
2157
2158 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2159 {
2160         hisi_sas_port_notify_formed(sas_phy);
2161 }
2162
2163 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2164                         u8 reg_index, u8 reg_count, u8 *write_data)
2165 {
2166         struct hisi_hba *hisi_hba = sha->lldd_ha;
2167
2168         if (!hisi_hba->hw->write_gpio)
2169                 return -EOPNOTSUPP;
2170
2171         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2172                                 reg_index, reg_count, write_data);
2173 }
2174
2175 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2176 {
2177         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2178         struct sas_phy *sphy = sas_phy->phy;
2179         unsigned long flags;
2180
2181         phy->phy_attached = 0;
2182         phy->phy_type = 0;
2183         phy->port = NULL;
2184
2185         spin_lock_irqsave(&phy->lock, flags);
2186         if (phy->enable)
2187                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2188         else
2189                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2190         spin_unlock_irqrestore(&phy->lock, flags);
2191 }
2192
2193 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
2194 {
2195         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2196         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2197         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
2198         struct device *dev = hisi_hba->dev;
2199
2200         if (rdy) {
2201                 /* Phy down but ready */
2202                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
2203                 hisi_sas_port_notify_formed(sas_phy);
2204         } else {
2205                 struct hisi_sas_port *port  = phy->port;
2206
2207                 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2208                     phy->in_reset) {
2209                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2210                         return;
2211                 }
2212                 /* Phy down and not ready */
2213                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
2214                 sas_phy_disconnected(sas_phy);
2215
2216                 if (port) {
2217                         if (phy->phy_type & PORT_TYPE_SAS) {
2218                                 int port_id = port->id;
2219
2220                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2221                                                                        port_id))
2222                                         port->port_attached = 0;
2223                         } else if (phy->phy_type & PORT_TYPE_SATA)
2224                                 port->port_attached = 0;
2225                 }
2226                 hisi_sas_phy_disconnected(phy);
2227         }
2228 }
2229 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2230
2231 void hisi_sas_sync_irqs(struct hisi_hba *hisi_hba)
2232 {
2233         int i;
2234
2235         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2236                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2237
2238                 synchronize_irq(cq->irq_no);
2239         }
2240 }
2241 EXPORT_SYMBOL_GPL(hisi_sas_sync_irqs);
2242
2243 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2244 {
2245         struct hisi_hba *hisi_hba = shost_priv(shost);
2246
2247         if (reset_type != SCSI_ADAPTER_RESET)
2248                 return -EOPNOTSUPP;
2249
2250         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2251
2252         return 0;
2253 }
2254 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2255
2256 struct scsi_transport_template *hisi_sas_stt;
2257 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2258
2259 static struct sas_domain_function_template hisi_sas_transport_ops = {
2260         .lldd_dev_found         = hisi_sas_dev_found,
2261         .lldd_dev_gone          = hisi_sas_dev_gone,
2262         .lldd_execute_task      = hisi_sas_queue_command,
2263         .lldd_control_phy       = hisi_sas_control_phy,
2264         .lldd_abort_task        = hisi_sas_abort_task,
2265         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2266         .lldd_clear_aca         = hisi_sas_clear_aca,
2267         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2268         .lldd_lu_reset          = hisi_sas_lu_reset,
2269         .lldd_query_task        = hisi_sas_query_task,
2270         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2271         .lldd_port_formed       = hisi_sas_port_formed,
2272         .lldd_write_gpio        = hisi_sas_write_gpio,
2273 };
2274
2275 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2276 {
2277         int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2278         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2279
2280         for (i = 0; i < hisi_hba->queue_count; i++) {
2281                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2282                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2283                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2284
2285                 s = sizeof(struct hisi_sas_cmd_hdr);
2286                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2287                         memset(&cmd_hdr[j], 0, s);
2288
2289                 dq->wr_point = 0;
2290
2291                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2292                 memset(hisi_hba->complete_hdr[i], 0, s);
2293                 cq->rd_point = 0;
2294         }
2295
2296         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2297         memset(hisi_hba->initial_fis, 0, s);
2298
2299         s = max_command_entries * sizeof(struct hisi_sas_iost);
2300         memset(hisi_hba->iost, 0, s);
2301
2302         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2303         memset(hisi_hba->breakpoint, 0, s);
2304
2305         s = sizeof(struct hisi_sas_sata_breakpoint);
2306         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2307                 memset(&sata_breakpoint[j], 0, s);
2308 }
2309 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2310
2311 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2312 {
2313         struct device *dev = hisi_hba->dev;
2314         int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2315         int max_command_entries_ru, sz_slot_buf_ru;
2316         int blk_cnt, slots_per_blk;
2317
2318         sema_init(&hisi_hba->sem, 1);
2319         spin_lock_init(&hisi_hba->lock);
2320         for (i = 0; i < hisi_hba->n_phy; i++) {
2321                 hisi_sas_phy_init(hisi_hba, i);
2322                 hisi_hba->port[i].port_attached = 0;
2323                 hisi_hba->port[i].id = -1;
2324         }
2325
2326         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2327                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2328                 hisi_hba->devices[i].device_id = i;
2329                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2330         }
2331
2332         for (i = 0; i < hisi_hba->queue_count; i++) {
2333                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2334                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2335
2336                 /* Completion queue structure */
2337                 cq->id = i;
2338                 cq->hisi_hba = hisi_hba;
2339
2340                 /* Delivery queue structure */
2341                 spin_lock_init(&dq->lock);
2342                 INIT_LIST_HEAD(&dq->list);
2343                 dq->id = i;
2344                 dq->hisi_hba = hisi_hba;
2345
2346                 /* Delivery queue */
2347                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2348                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2349                                                 &hisi_hba->cmd_hdr_dma[i],
2350                                                 GFP_KERNEL);
2351                 if (!hisi_hba->cmd_hdr[i])
2352                         goto err_out;
2353
2354                 /* Completion queue */
2355                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2356                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2357                                                 &hisi_hba->complete_hdr_dma[i],
2358                                                 GFP_KERNEL);
2359                 if (!hisi_hba->complete_hdr[i])
2360                         goto err_out;
2361         }
2362
2363         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2364         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2365                                              GFP_KERNEL);
2366         if (!hisi_hba->itct)
2367                 goto err_out;
2368
2369         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2370                                            sizeof(struct hisi_sas_slot),
2371                                            GFP_KERNEL);
2372         if (!hisi_hba->slot_info)
2373                 goto err_out;
2374
2375         /* roundup to avoid overly large block size */
2376         max_command_entries_ru = roundup(max_command_entries, 64);
2377         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2378                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2379         else
2380                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2381         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2382         s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2383         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2384         slots_per_blk = s / sz_slot_buf_ru;
2385
2386         for (i = 0; i < blk_cnt; i++) {
2387                 int slot_index = i * slots_per_blk;
2388                 dma_addr_t buf_dma;
2389                 void *buf;
2390
2391                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2392                                           GFP_KERNEL);
2393                 if (!buf)
2394                         goto err_out;
2395
2396                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2397                         struct hisi_sas_slot *slot;
2398
2399                         slot = &hisi_hba->slot_info[slot_index];
2400                         slot->buf = buf;
2401                         slot->buf_dma = buf_dma;
2402                         slot->idx = slot_index;
2403
2404                         buf += sz_slot_buf_ru;
2405                         buf_dma += sz_slot_buf_ru;
2406                 }
2407         }
2408
2409         s = max_command_entries * sizeof(struct hisi_sas_iost);
2410         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2411                                              GFP_KERNEL);
2412         if (!hisi_hba->iost)
2413                 goto err_out;
2414
2415         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2416         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2417                                                    &hisi_hba->breakpoint_dma,
2418                                                    GFP_KERNEL);
2419         if (!hisi_hba->breakpoint)
2420                 goto err_out;
2421
2422         hisi_hba->slot_index_count = max_command_entries;
2423         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2424         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2425         if (!hisi_hba->slot_index_tags)
2426                 goto err_out;
2427
2428         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2429         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2430                                                     &hisi_hba->initial_fis_dma,
2431                                                     GFP_KERNEL);
2432         if (!hisi_hba->initial_fis)
2433                 goto err_out;
2434
2435         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2436         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2437                                         &hisi_hba->sata_breakpoint_dma,
2438                                         GFP_KERNEL);
2439         if (!hisi_hba->sata_breakpoint)
2440                 goto err_out;
2441
2442         hisi_sas_slot_index_init(hisi_hba);
2443         hisi_hba->last_slot_index = HISI_SAS_UNRESERVED_IPTT;
2444
2445         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2446         if (!hisi_hba->wq) {
2447                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2448                 goto err_out;
2449         }
2450
2451         return 0;
2452 err_out:
2453         return -ENOMEM;
2454 }
2455 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2456
2457 void hisi_sas_free(struct hisi_hba *hisi_hba)
2458 {
2459         int i;
2460
2461         for (i = 0; i < hisi_hba->n_phy; i++) {
2462                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2463
2464                 del_timer_sync(&phy->timer);
2465         }
2466
2467         if (hisi_hba->wq)
2468                 destroy_workqueue(hisi_hba->wq);
2469 }
2470 EXPORT_SYMBOL_GPL(hisi_sas_free);
2471
2472 void hisi_sas_rst_work_handler(struct work_struct *work)
2473 {
2474         struct hisi_hba *hisi_hba =
2475                 container_of(work, struct hisi_hba, rst_work);
2476
2477         hisi_sas_controller_reset(hisi_hba);
2478 }
2479 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2480
2481 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2482 {
2483         struct hisi_sas_rst *rst =
2484                 container_of(work, struct hisi_sas_rst, work);
2485
2486         if (!hisi_sas_controller_reset(rst->hisi_hba))
2487                 rst->done = true;
2488         complete(rst->completion);
2489 }
2490 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2491
2492 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2493 {
2494         struct device *dev = hisi_hba->dev;
2495         struct platform_device *pdev = hisi_hba->platform_dev;
2496         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2497         struct clk *refclk;
2498
2499         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2500                                           SAS_ADDR_SIZE)) {
2501                 dev_err(dev, "could not get property sas-addr\n");
2502                 return -ENOENT;
2503         }
2504
2505         if (np) {
2506                 /*
2507                  * These properties are only required for platform device-based
2508                  * controller with DT firmware.
2509                  */
2510                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2511                                         "hisilicon,sas-syscon");
2512                 if (IS_ERR(hisi_hba->ctrl)) {
2513                         dev_err(dev, "could not get syscon\n");
2514                         return -ENOENT;
2515                 }
2516
2517                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2518                                              &hisi_hba->ctrl_reset_reg)) {
2519                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2520                         return -ENOENT;
2521                 }
2522
2523                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2524                                              &hisi_hba->ctrl_reset_sts_reg)) {
2525                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2526                         return -ENOENT;
2527                 }
2528
2529                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2530                                              &hisi_hba->ctrl_clock_ena_reg)) {
2531                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2532                         return -ENOENT;
2533                 }
2534         }
2535
2536         refclk = devm_clk_get(dev, NULL);
2537         if (IS_ERR(refclk))
2538                 dev_dbg(dev, "no ref clk property\n");
2539         else
2540                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2541
2542         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2543                 dev_err(dev, "could not get property phy-count\n");
2544                 return -ENOENT;
2545         }
2546
2547         if (device_property_read_u32(dev, "queue-count",
2548                                      &hisi_hba->queue_count)) {
2549                 dev_err(dev, "could not get property queue-count\n");
2550                 return -ENOENT;
2551         }
2552
2553         return 0;
2554 }
2555 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2556
2557 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2558                                               const struct hisi_sas_hw *hw)
2559 {
2560         struct resource *res;
2561         struct Scsi_Host *shost;
2562         struct hisi_hba *hisi_hba;
2563         struct device *dev = &pdev->dev;
2564         int error;
2565
2566         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2567         if (!shost) {
2568                 dev_err(dev, "scsi host alloc failed\n");
2569                 return NULL;
2570         }
2571         hisi_hba = shost_priv(shost);
2572
2573         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2574         hisi_hba->hw = hw;
2575         hisi_hba->dev = dev;
2576         hisi_hba->platform_dev = pdev;
2577         hisi_hba->shost = shost;
2578         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2579
2580         timer_setup(&hisi_hba->timer, NULL, 0);
2581
2582         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2583                 goto err_out;
2584
2585         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2586         if (error)
2587                 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2588
2589         if (error) {
2590                 dev_err(dev, "No usable DMA addressing method\n");
2591                 goto err_out;
2592         }
2593
2594         hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2595         if (IS_ERR(hisi_hba->regs))
2596                 goto err_out;
2597
2598         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2599         if (res) {
2600                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2601                 if (IS_ERR(hisi_hba->sgpio_regs))
2602                         goto err_out;
2603         }
2604
2605         if (hisi_sas_alloc(hisi_hba)) {
2606                 hisi_sas_free(hisi_hba);
2607                 goto err_out;
2608         }
2609
2610         return shost;
2611 err_out:
2612         scsi_host_put(shost);
2613         dev_err(dev, "shost alloc failed\n");
2614         return NULL;
2615 }
2616
2617 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2618 {
2619         if (hisi_hba->hw->interrupt_preinit)
2620                 return hisi_hba->hw->interrupt_preinit(hisi_hba);
2621         return 0;
2622 }
2623
2624 int hisi_sas_probe(struct platform_device *pdev,
2625                    const struct hisi_sas_hw *hw)
2626 {
2627         struct Scsi_Host *shost;
2628         struct hisi_hba *hisi_hba;
2629         struct device *dev = &pdev->dev;
2630         struct asd_sas_phy **arr_phy;
2631         struct asd_sas_port **arr_port;
2632         struct sas_ha_struct *sha;
2633         int rc, phy_nr, port_nr, i;
2634
2635         shost = hisi_sas_shost_alloc(pdev, hw);
2636         if (!shost)
2637                 return -ENOMEM;
2638
2639         sha = SHOST_TO_SAS_HA(shost);
2640         hisi_hba = shost_priv(shost);
2641         platform_set_drvdata(pdev, sha);
2642
2643         phy_nr = port_nr = hisi_hba->n_phy;
2644
2645         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2646         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2647         if (!arr_phy || !arr_port) {
2648                 rc = -ENOMEM;
2649                 goto err_out_ha;
2650         }
2651
2652         sha->sas_phy = arr_phy;
2653         sha->sas_port = arr_port;
2654         sha->lldd_ha = hisi_hba;
2655
2656         shost->transportt = hisi_sas_stt;
2657         shost->max_id = HISI_SAS_MAX_DEVICES;
2658         shost->max_lun = ~0;
2659         shost->max_channel = 1;
2660         shost->max_cmd_len = 16;
2661         if (hisi_hba->hw->slot_index_alloc) {
2662                 shost->can_queue = HISI_SAS_MAX_COMMANDS;
2663                 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2664         } else {
2665                 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2666                 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2667         }
2668
2669         sha->sas_ha_name = DRV_NAME;
2670         sha->dev = hisi_hba->dev;
2671         sha->lldd_module = THIS_MODULE;
2672         sha->sas_addr = &hisi_hba->sas_addr[0];
2673         sha->num_phys = hisi_hba->n_phy;
2674         sha->core.shost = hisi_hba->shost;
2675
2676         for (i = 0; i < hisi_hba->n_phy; i++) {
2677                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2678                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2679         }
2680
2681         rc = hisi_sas_interrupt_preinit(hisi_hba);
2682         if (rc)
2683                 goto err_out_ha;
2684
2685         rc = scsi_add_host(shost, &pdev->dev);
2686         if (rc)
2687                 goto err_out_ha;
2688
2689         rc = sas_register_ha(sha);
2690         if (rc)
2691                 goto err_out_register_ha;
2692
2693         rc = hisi_hba->hw->hw_init(hisi_hba);
2694         if (rc)
2695                 goto err_out_register_ha;
2696
2697         scsi_scan_host(shost);
2698
2699         return 0;
2700
2701 err_out_register_ha:
2702         scsi_remove_host(shost);
2703 err_out_ha:
2704         hisi_sas_free(hisi_hba);
2705         scsi_host_put(shost);
2706         return rc;
2707 }
2708 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2709
2710 int hisi_sas_remove(struct platform_device *pdev)
2711 {
2712         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2713         struct hisi_hba *hisi_hba = sha->lldd_ha;
2714         struct Scsi_Host *shost = sha->core.shost;
2715
2716         if (timer_pending(&hisi_hba->timer))
2717                 del_timer(&hisi_hba->timer);
2718
2719         sas_unregister_ha(sha);
2720         sas_remove_host(sha->core.shost);
2721
2722         hisi_sas_free(hisi_hba);
2723         scsi_host_put(shost);
2724         return 0;
2725 }
2726 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2727
2728 bool hisi_sas_debugfs_enable;
2729 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2730 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2731 MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
2732
2733 u32 hisi_sas_debugfs_dump_count = 1;
2734 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2735 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2736 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2737
2738 struct dentry *hisi_sas_debugfs_dir;
2739 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2740
2741 static __init int hisi_sas_init(void)
2742 {
2743         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2744         if (!hisi_sas_stt)
2745                 return -ENOMEM;
2746
2747         if (hisi_sas_debugfs_enable) {
2748                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2749                 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2750                         pr_info("hisi_sas: Limiting debugfs dump count\n");
2751                         hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2752                 }
2753         }
2754
2755         return 0;
2756 }
2757
2758 static __exit void hisi_sas_exit(void)
2759 {
2760         sas_release_transport(hisi_sas_stt);
2761
2762         debugfs_remove(hisi_sas_debugfs_dir);
2763 }
2764
2765 module_init(hisi_sas_init);
2766 module_exit(hisi_sas_exit);
2767
2768 MODULE_LICENSE("GPL");
2769 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2770 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2771 MODULE_ALIAS("platform:" DRV_NAME);