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 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
 122 {
 123         struct ata_queued_cmd *qc = task->uldd_task;
 124
 125         if (qc) {
 126                 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
 127                         qc->tf.command == ATA_CMD_FPDMA_READ) {
 128                         *tag = qc->tag;
 129                         return 1;
 130                 }
 131         }
 132         return 0;
 133 }
 134 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
 135
 136 /*
 137  * This function assumes linkrate mask fits in 8 bits, which it
 138  * does for all HW versions supported.
 139  */
 140 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 141 {
 142         u8 rate = 0;
 143         int i;
 144
 145         max -= SAS_LINK_RATE_1_5_GBPS;
 146         for (i = 0; i <= max; i++)
 147                 rate |= 1 << (i * 2);
 148         return rate;
 149 }
 150 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 151
 152 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 153 {
 154         return device->port->ha->lldd_ha;
 155 }
 156
 157 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 158 {
 159         return container_of(sas_port, struct hisi_sas_port, sas_port);
 160 }
 161 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 162
 163 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 164 {
 165         int phy_no;
 166
 167         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 168                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 169 }
 170 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 171
 172 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 173 {
 174         void *bitmap = hisi_hba->slot_index_tags;
 175
 176         clear_bit(slot_idx, bitmap);
 177 }
 178
 179 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 180 {
 181         unsigned long flags;
 182
 183         if (hisi_hba->hw->slot_index_alloc || (slot_idx >=
 184             hisi_hba->hw->max_command_entries - HISI_SAS_RESERVED_IPTT_CNT)) {
 185                 spin_lock_irqsave(&hisi_hba->lock, flags);
 186                 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 187                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 188         }
 189 }
 190
 191 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 192 {
 193         void *bitmap = hisi_hba->slot_index_tags;
 194
 195         set_bit(slot_idx, bitmap);
 196 }
 197
 198 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 199                                      struct scsi_cmnd *scsi_cmnd)
 200 {
 201         int index;
 202         void *bitmap = hisi_hba->slot_index_tags;
 203         unsigned long flags;
 204
 205         if (scsi_cmnd)
 206                 return scsi_cmnd->request->tag;
 207
 208         spin_lock_irqsave(&hisi_hba->lock, flags);
 209         index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
 210                                    hisi_hba->last_slot_index + 1);
 211         if (index >= hisi_hba->slot_index_count) {
 212                 index = find_next_zero_bit(bitmap,
 213                                 hisi_hba->slot_index_count,
 214                                 hisi_hba->hw->max_command_entries -
 215                                 HISI_SAS_RESERVED_IPTT_CNT);
 216                 if (index >= hisi_hba->slot_index_count) {
 217                         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 218                         return -SAS_QUEUE_FULL;
 219                 }
 220         }
 221         hisi_sas_slot_index_set(hisi_hba, index);
 222         hisi_hba->last_slot_index = index;
 223         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 224
 225         return index;
 226 }
 227
 228 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
 229 {
 230         int i;
 231
 232         for (i = 0; i < hisi_hba->slot_index_count; ++i)
 233                 hisi_sas_slot_index_clear(hisi_hba, i);
 234 }
 235
 236 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 237                              struct hisi_sas_slot *slot)
 238 {
 239         unsigned long flags;
 240         int device_id = slot->device_id;
 241         struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 242
 243         if (task) {
 244                 struct device *dev = hisi_hba->dev;
 245
 246                 if (!task->lldd_task)
 247                         return;
 248
 249                 task->lldd_task = NULL;
 250
 251                 if (!sas_protocol_ata(task->task_proto)) {
 252                         struct sas_ssp_task *ssp_task = &task->ssp_task;
 253                         struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 254
 255                         if (slot->n_elem)
 256                                 dma_unmap_sg(dev, task->scatter,
 257                                              task->num_scatter,
 258                                              task->data_dir);
 259                         if (slot->n_elem_dif)
 260                                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 261                                              scsi_prot_sg_count(scsi_cmnd),
 262                                              task->data_dir);
 263                 }
 264         }
 265
 266         spin_lock_irqsave(&sas_dev->lock, flags);
 267         list_del_init(&slot->entry);
 268         spin_unlock_irqrestore(&sas_dev->lock, flags);
 269
 270         memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 271
 272         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 273 }
 274 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 275
 276 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 277                                   struct hisi_sas_slot *slot)
 278 {
 279         hisi_hba->hw->prep_smp(hisi_hba, slot);
 280 }
 281
 282 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 283                                   struct hisi_sas_slot *slot)
 284 {
 285         hisi_hba->hw->prep_ssp(hisi_hba, slot);
 286 }
 287
 288 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 289                                   struct hisi_sas_slot *slot)
 290 {
 291         hisi_hba->hw->prep_stp(hisi_hba, slot);
 292 }
 293
 294 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 295                 struct hisi_sas_slot *slot,
 296                 int device_id, int abort_flag, int tag_to_abort)
 297 {
 298         hisi_hba->hw->prep_abort(hisi_hba, slot,
 299                         device_id, abort_flag, tag_to_abort);
 300 }
 301
 302 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 303                                struct sas_task *task, int n_elem,
 304                                int n_elem_req, int n_elem_resp)
 305 {
 306         struct device *dev = hisi_hba->dev;
 307
 308         if (!sas_protocol_ata(task->task_proto)) {
 309                 if (task->num_scatter) {
 310                         if (n_elem)
 311                                 dma_unmap_sg(dev, task->scatter,
 312                                              task->num_scatter,
 313                                              task->data_dir);
 314                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 315                         if (n_elem_req)
 316                                 dma_unmap_sg(dev, &task->smp_task.smp_req,
 317                                              1, DMA_TO_DEVICE);
 318                         if (n_elem_resp)
 319                                 dma_unmap_sg(dev, &task->smp_task.smp_resp,
 320                                              1, DMA_FROM_DEVICE);
 321                 }
 322         }
 323 }
 324
 325 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 326                             struct sas_task *task, int *n_elem,
 327                             int *n_elem_req, int *n_elem_resp)
 328 {
 329         struct device *dev = hisi_hba->dev;
 330         int rc;
 331
 332         if (sas_protocol_ata(task->task_proto)) {
 333                 *n_elem = task->num_scatter;
 334         } else {
 335                 unsigned int req_len, resp_len;
 336
 337                 if (task->num_scatter) {
 338                         *n_elem = dma_map_sg(dev, task->scatter,
 339                                              task->num_scatter, task->data_dir);
 340                         if (!*n_elem) {
 341                                 rc = -ENOMEM;
 342                                 goto prep_out;
 343                         }
 344                 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 345                         *n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
 346                                                  1, DMA_TO_DEVICE);
 347                         if (!*n_elem_req) {
 348                                 rc = -ENOMEM;
 349                                 goto prep_out;
 350                         }
 351                         req_len = sg_dma_len(&task->smp_task.smp_req);
 352                         if (req_len & 0x3) {
 353                                 rc = -EINVAL;
 354                                 goto err_out_dma_unmap;
 355                         }
 356                         *n_elem_resp = dma_map_sg(dev, &task->smp_task.smp_resp,
 357                                                   1, DMA_FROM_DEVICE);
 358                         if (!*n_elem_resp) {
 359                                 rc = -ENOMEM;
 360                                 goto err_out_dma_unmap;
 361                         }
 362                         resp_len = sg_dma_len(&task->smp_task.smp_resp);
 363                         if (resp_len & 0x3) {
 364                                 rc = -EINVAL;
 365                                 goto err_out_dma_unmap;
 366                         }
 367                 }
 368         }
 369
 370         if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 371                 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT",
 372                         *n_elem);
 373                 rc = -EINVAL;
 374                 goto err_out_dma_unmap;
 375         }
 376         return 0;
 377
 378 err_out_dma_unmap:
 379         /* It would be better to call dma_unmap_sg() here, but it's messy */
 380         hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
 381                            *n_elem_req, *n_elem_resp);
 382 prep_out:
 383         return rc;
 384 }
 385
 386 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 387                                    struct sas_task *task, int n_elem_dif)
 388 {
 389         struct device *dev = hisi_hba->dev;
 390
 391         if (n_elem_dif) {
 392                 struct sas_ssp_task *ssp_task = &task->ssp_task;
 393                 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 394
 395                 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 396                              scsi_prot_sg_count(scsi_cmnd),
 397                              task->data_dir);
 398         }
 399 }
 400
 401 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 402                                 int *n_elem_dif, struct sas_task *task)
 403 {
 404         struct device *dev = hisi_hba->dev;
 405         struct sas_ssp_task *ssp_task;
 406         struct scsi_cmnd *scsi_cmnd;
 407         int rc;
 408
 409         if (task->num_scatter) {
 410                 ssp_task = &task->ssp_task;
 411                 scsi_cmnd = ssp_task->cmd;
 412
 413                 if (scsi_prot_sg_count(scsi_cmnd)) {
 414                         *n_elem_dif = dma_map_sg(dev,
 415                                                  scsi_prot_sglist(scsi_cmnd),
 416                                                  scsi_prot_sg_count(scsi_cmnd),
 417                                                  task->data_dir);
 418
 419                         if (!*n_elem_dif)
 420                                 return -ENOMEM;
 421
 422                         if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 423                                 dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 424                                         *n_elem_dif);
 425                                 rc = -EINVAL;
 426                                 goto err_out_dif_dma_unmap;
 427                         }
 428                 }
 429         }
 430
 431         return 0;
 432
 433 err_out_dif_dma_unmap:
 434         dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 435                      scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 436         return rc;
 437 }
 438
 439 static int hisi_sas_task_prep(struct sas_task *task,
 440                               struct hisi_sas_dq **dq_pointer,
 441                               bool is_tmf, struct hisi_sas_tmf_task *tmf,
 442                               int *pass)
 443 {
 444         struct domain_device *device = task->dev;
 445         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 446         struct hisi_sas_device *sas_dev = device->lldd_dev;
 447         struct hisi_sas_port *port;
 448         struct hisi_sas_slot *slot;
 449         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 450         struct asd_sas_port *sas_port = device->port;
 451         struct device *dev = hisi_hba->dev;
 452         int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
 453         int n_elem = 0, n_elem_dif = 0, n_elem_req = 0, n_elem_resp = 0;
 454         struct hisi_sas_dq *dq;
 455         unsigned long flags;
 456         int wr_q_index;
 457
 458         if (DEV_IS_GONE(sas_dev)) {
 459                 if (sas_dev)
 460                         dev_info(dev, "task prep: device %d not ready\n",
 461                                  sas_dev->device_id);
 462                 else
 463                         dev_info(dev, "task prep: device %016llx not ready\n",
 464                                  SAS_ADDR(device->sas_addr));
 465
 466                 return -ECOMM;
 467         }
 468
 469         if (hisi_hba->reply_map) {
 470                 int cpu = raw_smp_processor_id();
 471                 unsigned int dq_index = hisi_hba->reply_map[cpu];
 472
 473                 *dq_pointer = dq = &hisi_hba->dq[dq_index];
 474         } else {
 475                 *dq_pointer = dq = sas_dev->dq;
 476         }
 477
 478         port = to_hisi_sas_port(sas_port);
 479         if (port && !port->port_attached) {
 480                 dev_info(dev, "task prep: %s port%d not attach device\n",
 481                          (dev_is_sata(device)) ?
 482                          "SATA/STP" : "SAS",
 483                          device->port->id);
 484
 485                 return -ECOMM;
 486         }
 487
 488         rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
 489                               &n_elem_req, &n_elem_resp);
 490         if (rc < 0)
 491                 goto prep_out;
 492
 493         if (!sas_protocol_ata(task->task_proto)) {
 494                 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 495                 if (rc < 0)
 496                         goto err_out_dma_unmap;
 497         }
 498
 499         if (hisi_hba->hw->slot_index_alloc)
 500                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 501         else {
 502                 struct scsi_cmnd *scsi_cmnd = NULL;
 503
 504                 if (task->uldd_task) {
 505                         struct ata_queued_cmd *qc;
 506
 507                         if (dev_is_sata(device)) {
 508                                 qc = task->uldd_task;
 509                                 scsi_cmnd = qc->scsicmd;
 510                         } else {
 511                                 scsi_cmnd = task->uldd_task;
 512                         }
 513                 }
 514                 rc  = hisi_sas_slot_index_alloc(hisi_hba, scsi_cmnd);
 515         }
 516         if (rc < 0)
 517                 goto err_out_dif_dma_unmap;
 518
 519         slot_idx = rc;
 520         slot = &hisi_hba->slot_info[slot_idx];
 521
 522         spin_lock_irqsave(&dq->lock, flags);
 523         wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
 524         if (wr_q_index < 0) {
 525                 spin_unlock_irqrestore(&dq->lock, flags);
 526                 rc = -EAGAIN;
 527                 goto err_out_tag;
 528         }
 529
 530         list_add_tail(&slot->delivery, &dq->list);
 531         spin_unlock_irqrestore(&dq->lock, flags);
 532         spin_lock_irqsave(&sas_dev->lock, flags);
 533         list_add_tail(&slot->entry, &sas_dev->list);
 534         spin_unlock_irqrestore(&sas_dev->lock, flags);
 535
 536         dlvry_queue = dq->id;
 537         dlvry_queue_slot = wr_q_index;
 538
 539         slot->device_id = sas_dev->device_id;
 540         slot->n_elem = n_elem;
 541         slot->n_elem_dif = n_elem_dif;
 542         slot->dlvry_queue = dlvry_queue;
 543         slot->dlvry_queue_slot = dlvry_queue_slot;
 544         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 545         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 546         slot->task = task;
 547         slot->port = port;
 548         slot->tmf = tmf;
 549         slot->is_internal = is_tmf;
 550         task->lldd_task = slot;
 551
 552         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 553         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 554         memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
 555
 556         switch (task->task_proto) {
 557         case SAS_PROTOCOL_SMP:
 558                 hisi_sas_task_prep_smp(hisi_hba, slot);
 559                 break;
 560         case SAS_PROTOCOL_SSP:
 561                 hisi_sas_task_prep_ssp(hisi_hba, slot);
 562                 break;
 563         case SAS_PROTOCOL_SATA:
 564         case SAS_PROTOCOL_STP:
 565         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 566                 hisi_sas_task_prep_ata(hisi_hba, slot);
 567                 break;
 568         default:
 569                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 570                         task->task_proto);
 571                 break;
 572         }
 573
 574         spin_lock_irqsave(&task->task_state_lock, flags);
 575         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 576         spin_unlock_irqrestore(&task->task_state_lock, flags);
 577
 578         ++(*pass);
 579         WRITE_ONCE(slot->ready, 1);
 580
 581         return 0;
 582
 583 err_out_tag:
 584         hisi_sas_slot_index_free(hisi_hba, slot_idx);
 585 err_out_dif_dma_unmap:
 586         if (!sas_protocol_ata(task->task_proto))
 587                 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 588 err_out_dma_unmap:
 589         hisi_sas_dma_unmap(hisi_hba, task, n_elem,
 590                            n_elem_req, n_elem_resp);
 591 prep_out:
 592         dev_err(dev, "task prep: failed[%d]!\n", rc);
 593         return rc;
 594 }
 595
 596 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 597                               bool is_tmf, struct hisi_sas_tmf_task *tmf)
 598 {
 599         u32 rc;
 600         u32 pass = 0;
 601         unsigned long flags;
 602         struct hisi_hba *hisi_hba;
 603         struct device *dev;
 604         struct domain_device *device = task->dev;
 605         struct asd_sas_port *sas_port = device->port;
 606         struct hisi_sas_dq *dq = NULL;
 607
 608         if (!sas_port) {
 609                 struct task_status_struct *ts = &task->task_status;
 610
 611                 ts->resp = SAS_TASK_UNDELIVERED;
 612                 ts->stat = SAS_PHY_DOWN;
 613                 /*
 614                  * libsas will use dev->port, should
 615                  * not call task_done for sata
 616                  */
 617                 if (device->dev_type != SAS_SATA_DEV)
 618                         task->task_done(task);
 619                 return -ECOMM;
 620         }
 621
 622         hisi_hba = dev_to_hisi_hba(device);
 623         dev = hisi_hba->dev;
 624
 625         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 626                 if (in_softirq())
 627                         return -EINVAL;
 628
 629                 down(&hisi_hba->sem);
 630                 up(&hisi_hba->sem);
 631         }
 632
 633         /* protect task_prep and start_delivery sequence */
 634         rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
 635         if (rc)
 636                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 637
 638         if (likely(pass)) {
 639                 spin_lock_irqsave(&dq->lock, flags);
 640                 hisi_hba->hw->start_delivery(dq);
 641                 spin_unlock_irqrestore(&dq->lock, flags);
 642         }
 643
 644         return rc;
 645 }
 646
 647 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 648 {
 649         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 650         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 651         struct sas_ha_struct *sas_ha;
 652
 653         if (!phy->phy_attached)
 654                 return;
 655
 656         sas_ha = &hisi_hba->sha;
 657         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 658
 659         if (sas_phy->phy) {
 660                 struct sas_phy *sphy = sas_phy->phy;
 661
 662                 sphy->negotiated_linkrate = sas_phy->linkrate;
 663                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 664                 sphy->maximum_linkrate_hw =
 665                         hisi_hba->hw->phy_get_max_linkrate();
 666                 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 667                         sphy->minimum_linkrate = phy->minimum_linkrate;
 668
 669                 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 670                         sphy->maximum_linkrate = phy->maximum_linkrate;
 671         }
 672
 673         if (phy->phy_type & PORT_TYPE_SAS) {
 674                 struct sas_identify_frame *id;
 675
 676                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 677                 id->dev_type = phy->identify.device_type;
 678                 id->initiator_bits = SAS_PROTOCOL_ALL;
 679                 id->target_bits = phy->identify.target_port_protocols;
 680         } else if (phy->phy_type & PORT_TYPE_SATA) {
 681                 /* Nothing */
 682         }
 683
 684         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 685         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 686 }
 687
 688 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 689 {
 690         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 691         struct hisi_sas_device *sas_dev = NULL;
 692         unsigned long flags;
 693         int last = hisi_hba->last_dev_id;
 694         int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 695         int i;
 696
 697         spin_lock_irqsave(&hisi_hba->lock, flags);
 698         for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 699                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 700                         int queue = i % hisi_hba->queue_count;
 701                         struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 702
 703                         hisi_hba->devices[i].device_id = i;
 704                         sas_dev = &hisi_hba->devices[i];
 705                         sas_dev->dev_status = HISI_SAS_DEV_INIT;
 706                         sas_dev->dev_type = device->dev_type;
 707                         sas_dev->hisi_hba = hisi_hba;
 708                         sas_dev->sas_device = device;
 709                         sas_dev->dq = dq;
 710                         spin_lock_init(&sas_dev->lock);
 711                         INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 712                         break;
 713                 }
 714                 i++;
 715         }
 716         hisi_hba->last_dev_id = i;
 717         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 718
 719         return sas_dev;
 720 }
 721
 722 #define HISI_SAS_SRST_ATA_DISK_CNT 3
 723 static int hisi_sas_init_device(struct domain_device *device)
 724 {
 725         int rc = TMF_RESP_FUNC_COMPLETE;
 726         struct scsi_lun lun;
 727         struct hisi_sas_tmf_task tmf_task;
 728         int retry = HISI_SAS_SRST_ATA_DISK_CNT;
 729         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 730         struct device *dev = hisi_hba->dev;
 731         struct sas_phy *local_phy;
 732
 733         switch (device->dev_type) {
 734         case SAS_END_DEVICE:
 735                 int_to_scsilun(0, &lun);
 736
 737                 tmf_task.tmf = TMF_CLEAR_TASK_SET;
 738                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
 739                                                   &tmf_task);
 740                 if (rc == TMF_RESP_FUNC_COMPLETE)
 741                         hisi_sas_release_task(hisi_hba, device);
 742                 break;
 743         case SAS_SATA_DEV:
 744         case SAS_SATA_PM:
 745         case SAS_SATA_PM_PORT:
 746         case SAS_SATA_PENDING:
 747                 /*
 748                  * send HARD RESET to clear previous affiliation of
 749                  * STP target port
 750                  */
 751                 local_phy = sas_get_local_phy(device);
 752                 if (!scsi_is_sas_phy_local(local_phy) &&
 753                     !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
 754                         unsigned long deadline = ata_deadline(jiffies, 20000);
 755                         struct sata_device *sata_dev = &device->sata_dev;
 756                         struct ata_host *ata_host = sata_dev->ata_host;
 757                         struct ata_port_operations *ops = ata_host->ops;
 758                         struct ata_port *ap = sata_dev->ap;
 759                         struct ata_link *link;
 760                         unsigned int classes;
 761
 762                         ata_for_each_link(link, ap, EDGE)
 763                                 rc = ops->hardreset(link, &classes,
 764                                                     deadline);
 765                 }
 766                 sas_put_local_phy(local_phy);
 767                 if (rc) {
 768                         dev_warn(dev, "SATA disk hardreset fail: %d\n", rc);
 769                         return rc;
 770                 }
 771
 772                 while (retry-- > 0) {
 773                         rc = hisi_sas_softreset_ata_disk(device);
 774                         if (!rc)
 775                                 break;
 776                 }
 777                 break;
 778         default:
 779                 break;
 780         }
 781
 782         return rc;
 783 }
 784
 785 static int hisi_sas_dev_found(struct domain_device *device)
 786 {
 787         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 788         struct domain_device *parent_dev = device->parent;
 789         struct hisi_sas_device *sas_dev;
 790         struct device *dev = hisi_hba->dev;
 791         int rc;
 792
 793         if (hisi_hba->hw->alloc_dev)
 794                 sas_dev = hisi_hba->hw->alloc_dev(device);
 795         else
 796                 sas_dev = hisi_sas_alloc_dev(device);
 797         if (!sas_dev) {
 798                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 799                         HISI_SAS_MAX_DEVICES);
 800                 return -EINVAL;
 801         }
 802
 803         device->lldd_dev = sas_dev;
 804         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 805
 806         if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
 807                 int phy_no;
 808                 u8 phy_num = parent_dev->ex_dev.num_phys;
 809                 struct ex_phy *phy;
 810
 811                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 812                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 813                         if (SAS_ADDR(phy->attached_sas_addr) ==
 814                                 SAS_ADDR(device->sas_addr))
 815                                 break;
 816                 }
 817
 818                 if (phy_no == phy_num) {
 819                         dev_info(dev, "dev found: no attached "
 820                                  "dev:%016llx at ex:%016llx\n",
 821                                  SAS_ADDR(device->sas_addr),
 822                                  SAS_ADDR(parent_dev->sas_addr));
 823                         rc = -EINVAL;
 824                         goto err_out;
 825                 }
 826         }
 827
 828         dev_info(dev, "dev[%d:%x] found\n",
 829                 sas_dev->device_id, sas_dev->dev_type);
 830
 831         rc = hisi_sas_init_device(device);
 832         if (rc)
 833                 goto err_out;
 834         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 835         return 0;
 836
 837 err_out:
 838         hisi_sas_dev_gone(device);
 839         return rc;
 840 }
 841
 842 int hisi_sas_slave_configure(struct scsi_device *sdev)
 843 {
 844         struct domain_device *dev = sdev_to_domain_dev(sdev);
 845         int ret = sas_slave_configure(sdev);
 846
 847         if (ret)
 848                 return ret;
 849         if (!dev_is_sata(dev))
 850                 sas_change_queue_depth(sdev, 64);
 851
 852         return 0;
 853 }
 854 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
 855
 856 void hisi_sas_scan_start(struct Scsi_Host *shost)
 857 {
 858         struct hisi_hba *hisi_hba = shost_priv(shost);
 859
 860         hisi_hba->hw->phys_init(hisi_hba);
 861 }
 862 EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 863
 864 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 865 {
 866         struct hisi_hba *hisi_hba = shost_priv(shost);
 867         struct sas_ha_struct *sha = &hisi_hba->sha;
 868
 869         /* Wait for PHY up interrupt to occur */
 870         if (time < HZ)
 871                 return 0;
 872
 873         sas_drain_work(sha);
 874         return 1;
 875 }
 876 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 877
 878 static void hisi_sas_phyup_work(struct work_struct *work)
 879 {
 880         struct hisi_sas_phy *phy =
 881                 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
 882         struct hisi_hba *hisi_hba = phy->hisi_hba;
 883         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 884         int phy_no = sas_phy->id;
 885
 886         if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 887                 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 888         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 889 }
 890
 891 static void hisi_sas_linkreset_work(struct work_struct *work)
 892 {
 893         struct hisi_sas_phy *phy =
 894                 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 895         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 896
 897         hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 898 }
 899
 900 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
 901         [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
 902         [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
 903 };
 904
 905 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 906                                 enum hisi_sas_phy_event event)
 907 {
 908         struct hisi_hba *hisi_hba = phy->hisi_hba;
 909
 910         if (WARN_ON(event >= HISI_PHYES_NUM))
 911                 return false;
 912
 913         return queue_work(hisi_hba->wq, &phy->works[event]);
 914 }
 915 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
 916
 917 static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
 918 {
 919         struct hisi_sas_phy *phy = from_timer(phy, t, timer);
 920         struct hisi_hba *hisi_hba = phy->hisi_hba;
 921         struct device *dev = hisi_hba->dev;
 922         int phy_no = phy->sas_phy.id;
 923
 924         dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
 925         hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 926 }
 927
 928 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
 929 {
 930         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 931         struct device *dev = hisi_hba->dev;
 932
 933         if (!timer_pending(&phy->timer)) {
 934                 dev_dbg(dev, "phy%d OOB ready\n", phy_no);
 935                 phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
 936                 add_timer(&phy->timer);
 937         }
 938 }
 939 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
 940
 941 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 942 {
 943         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 944         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 945         int i;
 946
 947         phy->hisi_hba = hisi_hba;
 948         phy->port = NULL;
 949         phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
 950         phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
 951         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 952         sas_phy->class = SAS;
 953         sas_phy->iproto = SAS_PROTOCOL_ALL;
 954         sas_phy->tproto = 0;
 955         sas_phy->type = PHY_TYPE_PHYSICAL;
 956         sas_phy->role = PHY_ROLE_INITIATOR;
 957         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 958         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 959         sas_phy->id = phy_no;
 960         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 961         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 962         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 963         sas_phy->lldd_phy = phy;
 964
 965         for (i = 0; i < HISI_PHYES_NUM; i++)
 966                 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
 967
 968         spin_lock_init(&phy->lock);
 969
 970         timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
 971 }
 972
 973 /* Wrapper to ensure we track hisi_sas_phy.enable properly */
 974 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
 975 {
 976         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 977         struct asd_sas_phy *aphy = &phy->sas_phy;
 978         struct sas_phy *sphy = aphy->phy;
 979         unsigned long flags;
 980
 981         spin_lock_irqsave(&phy->lock, flags);
 982
 983         if (enable) {
 984                 /* We may have been enabled already; if so, don't touch */
 985                 if (!phy->enable)
 986                         sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 987                 hisi_hba->hw->phy_start(hisi_hba, phy_no);
 988         } else {
 989                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
 990                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 991         }
 992         phy->enable = enable;
 993         spin_unlock_irqrestore(&phy->lock, flags);
 994 }
 995 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
 996
 997 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 998 {
 999         struct sas_ha_struct *sas_ha = sas_phy->ha;
1000         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1001         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1002         struct asd_sas_port *sas_port = sas_phy->port;
1003         struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
1004         unsigned long flags;
1005
1006         if (!sas_port)
1007                 return;
1008
1009         spin_lock_irqsave(&hisi_hba->lock, flags);
1010         port->port_attached = 1;
1011         port->id = phy->port_id;
1012         phy->port = port;
1013         sas_port->lldd_port = port;
1014         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1015 }
1016
1017 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1018                                      struct hisi_sas_slot *slot)
1019 {
1020         if (task) {
1021                 unsigned long flags;
1022                 struct task_status_struct *ts;
1023
1024                 ts = &task->task_status;
1025
1026                 ts->resp = SAS_TASK_COMPLETE;
1027                 ts->stat = SAS_ABORTED_TASK;
1028                 spin_lock_irqsave(&task->task_state_lock, flags);
1029                 task->task_state_flags &=
1030                         ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
1031                 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1032                         task->task_state_flags |= SAS_TASK_STATE_DONE;
1033                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1034         }
1035
1036         hisi_sas_slot_task_free(hisi_hba, task, slot);
1037 }
1038
1039 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1040                         struct domain_device *device)
1041 {
1042         struct hisi_sas_slot *slot, *slot2;
1043         struct hisi_sas_device *sas_dev = device->lldd_dev;
1044
1045         list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1046                 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
1047 }
1048
1049 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1050 {
1051         struct hisi_sas_device *sas_dev;
1052         struct domain_device *device;
1053         int i;
1054
1055         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1056                 sas_dev = &hisi_hba->devices[i];
1057                 device = sas_dev->sas_device;
1058
1059                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1060                     !device)
1061                         continue;
1062
1063                 hisi_sas_release_task(hisi_hba, device);
1064         }
1065 }
1066 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1067
1068 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1069                                 struct domain_device *device)
1070 {
1071         if (hisi_hba->hw->dereg_device)
1072                 hisi_hba->hw->dereg_device(hisi_hba, device);
1073 }
1074
1075 static void hisi_sas_dev_gone(struct domain_device *device)
1076 {
1077         struct hisi_sas_device *sas_dev = device->lldd_dev;
1078         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1079         struct device *dev = hisi_hba->dev;
1080
1081         dev_info(dev, "dev[%d:%x] is gone\n",
1082                  sas_dev->device_id, sas_dev->dev_type);
1083
1084         if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
1085                 hisi_sas_internal_task_abort(hisi_hba, device,
1086                                              HISI_SAS_INT_ABT_DEV, 0);
1087
1088                 hisi_sas_dereg_device(hisi_hba, device);
1089
1090                 down(&hisi_hba->sem);
1091                 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1092                 up(&hisi_hba->sem);
1093                 device->lldd_dev = NULL;
1094         }
1095
1096         if (hisi_hba->hw->free_device)
1097                 hisi_hba->hw->free_device(sas_dev);
1098         sas_dev->dev_type = SAS_PHY_UNUSED;
1099 }
1100
1101 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
1102 {
1103         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
1104 }
1105
1106 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1107                         struct sas_phy_linkrates *r)
1108 {
1109         struct sas_phy_linkrates _r;
1110
1111         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1112         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1113         enum sas_linkrate min, max;
1114
1115         if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1116                 return -EINVAL;
1117
1118         if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1119                 max = sas_phy->phy->maximum_linkrate;
1120                 min = r->minimum_linkrate;
1121         } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1122                 max = r->maximum_linkrate;
1123                 min = sas_phy->phy->minimum_linkrate;
1124         } else
1125                 return -EINVAL;
1126
1127         _r.maximum_linkrate = max;
1128         _r.minimum_linkrate = min;
1129
1130         sas_phy->phy->maximum_linkrate = max;
1131         sas_phy->phy->minimum_linkrate = min;
1132
1133         hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1134         msleep(100);
1135         hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1136         hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1137
1138         return 0;
1139 }
1140
1141 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1142                                 void *funcdata)
1143 {
1144         struct sas_ha_struct *sas_ha = sas_phy->ha;
1145         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1146         int phy_no = sas_phy->id;
1147
1148         switch (func) {
1149         case PHY_FUNC_HARD_RESET:
1150                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1151                 break;
1152
1153         case PHY_FUNC_LINK_RESET:
1154                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1155                 msleep(100);
1156                 hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1157                 break;
1158
1159         case PHY_FUNC_DISABLE:
1160                 hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1161                 break;
1162
1163         case PHY_FUNC_SET_LINK_RATE:
1164                 return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1165         case PHY_FUNC_GET_EVENTS:
1166                 if (hisi_hba->hw->get_events) {
1167                         hisi_hba->hw->get_events(hisi_hba, phy_no);
1168                         break;
1169                 }
1170                 /* fallthru */
1171         case PHY_FUNC_RELEASE_SPINUP_HOLD:
1172         default:
1173                 return -EOPNOTSUPP;
1174         }
1175         return 0;
1176 }
1177
1178 static void hisi_sas_task_done(struct sas_task *task)
1179 {
1180         del_timer(&task->slow_task->timer);
1181         complete(&task->slow_task->completion);
1182 }
1183
1184 static void hisi_sas_tmf_timedout(struct timer_list *t)
1185 {
1186         struct sas_task_slow *slow = from_timer(slow, t, timer);
1187         struct sas_task *task = slow->task;
1188         unsigned long flags;
1189         bool is_completed = true;
1190
1191         spin_lock_irqsave(&task->task_state_lock, flags);
1192         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1193                 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1194                 is_completed = false;
1195         }
1196         spin_unlock_irqrestore(&task->task_state_lock, flags);
1197
1198         if (!is_completed)
1199                 complete(&task->slow_task->completion);
1200 }
1201
1202 #define TASK_TIMEOUT 20
1203 #define TASK_RETRY 3
1204 #define INTERNAL_ABORT_TIMEOUT 6
1205 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
1206                                            void *parameter, u32 para_len,
1207                                            struct hisi_sas_tmf_task *tmf)
1208 {
1209         struct hisi_sas_device *sas_dev = device->lldd_dev;
1210         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1211         struct device *dev = hisi_hba->dev;
1212         struct sas_task *task;
1213         int res, retry;
1214
1215         for (retry = 0; retry < TASK_RETRY; retry++) {
1216                 task = sas_alloc_slow_task(GFP_KERNEL);
1217                 if (!task)
1218                         return -ENOMEM;
1219
1220                 task->dev = device;
1221                 task->task_proto = device->tproto;
1222
1223                 if (dev_is_sata(device)) {
1224                         task->ata_task.device_control_reg_update = 1;
1225                         memcpy(&task->ata_task.fis, parameter, para_len);
1226                 } else {
1227                         memcpy(&task->ssp_task, parameter, para_len);
1228                 }
1229                 task->task_done = hisi_sas_task_done;
1230
1231                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1232                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT * HZ;
1233                 add_timer(&task->slow_task->timer);
1234
1235                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
1236
1237                 if (res) {
1238                         del_timer(&task->slow_task->timer);
1239                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
1240                                 res);
1241                         goto ex_err;
1242                 }
1243
1244                 wait_for_completion(&task->slow_task->completion);
1245                 res = TMF_RESP_FUNC_FAILED;
1246                 /* Even TMF timed out, return direct. */
1247                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1248                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1249                                 struct hisi_sas_slot *slot = task->lldd_task;
1250
1251                                 dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1252                                 if (slot) {
1253                                         struct hisi_sas_cq *cq =
1254                                                &hisi_hba->cq[slot->dlvry_queue];
1255                                         /*
1256                                          * flush tasklet to avoid free'ing task
1257                                          * before using task in IO completion
1258                                          */
1259                                         tasklet_kill(&cq->tasklet);
1260                                         slot->task = NULL;
1261                                 }
1262
1263                                 goto ex_err;
1264                         } else
1265                                 dev_err(dev, "abort tmf: TMF task timeout\n");
1266                 }
1267
1268                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1269                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1270                         res = TMF_RESP_FUNC_COMPLETE;
1271                         break;
1272                 }
1273
1274                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1275                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1276                         res = TMF_RESP_FUNC_SUCC;
1277                         break;
1278                 }
1279
1280                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1281                       task->task_status.stat == SAS_DATA_UNDERRUN) {
1282                         /* no error, but return the number of bytes of
1283                          * underrun
1284                          */
1285                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x sts 0x%x underrun\n",
1286                                  SAS_ADDR(device->sas_addr),
1287                                  task->task_status.resp,
1288                                  task->task_status.stat);
1289                         res = task->task_status.residual;
1290                         break;
1291                 }
1292
1293                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1294                         task->task_status.stat == SAS_DATA_OVERRUN) {
1295                         dev_warn(dev, "abort tmf: blocked task error\n");
1296                         res = -EMSGSIZE;
1297                         break;
1298                 }
1299
1300                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1301                     task->task_status.stat == SAS_OPEN_REJECT) {
1302                         dev_warn(dev, "abort tmf: open reject failed\n");
1303                         res = -EIO;
1304                 } else {
1305                         dev_warn(dev, "abort tmf: task to dev %016llx resp: 0x%x status 0x%x\n",
1306                                  SAS_ADDR(device->sas_addr),
1307                                  task->task_status.resp,
1308                                  task->task_status.stat);
1309                 }
1310                 sas_free_task(task);
1311                 task = NULL;
1312         }
1313 ex_err:
1314         if (retry == TASK_RETRY)
1315                 dev_warn(dev, "abort tmf: executing internal task failed!\n");
1316         sas_free_task(task);
1317         return res;
1318 }
1319
1320 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1321                 bool reset, int pmp, u8 *fis)
1322 {
1323         struct ata_taskfile tf;
1324
1325         ata_tf_init(dev, &tf);
1326         if (reset)
1327                 tf.ctl |= ATA_SRST;
1328         else
1329                 tf.ctl &= ~ATA_SRST;
1330         tf.command = ATA_CMD_DEV_RESET;
1331         ata_tf_to_fis(&tf, pmp, 0, fis);
1332 }
1333
1334 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1335 {
1336         u8 fis[20] = {0};
1337         struct ata_port *ap = device->sata_dev.ap;
1338         struct ata_link *link;
1339         int rc = TMF_RESP_FUNC_FAILED;
1340         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1341         struct device *dev = hisi_hba->dev;
1342         int s = sizeof(struct host_to_dev_fis);
1343
1344         ata_for_each_link(link, ap, EDGE) {
1345                 int pmp = sata_srst_pmp(link);
1346
1347                 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1348                 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
1349                 if (rc != TMF_RESP_FUNC_COMPLETE)
1350                         break;
1351         }
1352
1353         if (rc == TMF_RESP_FUNC_COMPLETE) {
1354                 ata_for_each_link(link, ap, EDGE) {
1355                         int pmp = sata_srst_pmp(link);
1356
1357                         hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1358                         rc = hisi_sas_exec_internal_tmf_task(device, fis,
1359                                                              s, NULL);
1360                         if (rc != TMF_RESP_FUNC_COMPLETE)
1361                                 dev_err(dev, "ata disk de-reset failed\n");
1362                 }
1363         } else {
1364                 dev_err(dev, "ata disk reset failed\n");
1365         }
1366
1367         if (rc == TMF_RESP_FUNC_COMPLETE)
1368                 hisi_sas_release_task(hisi_hba, device);
1369
1370         return rc;
1371 }
1372
1373 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
1374                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
1375 {
1376         struct sas_ssp_task ssp_task;
1377
1378         if (!(device->tproto & SAS_PROTOCOL_SSP))
1379                 return TMF_RESP_FUNC_ESUPP;
1380
1381         memcpy(ssp_task.LUN, lun, 8);
1382
1383         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
1384                                 sizeof(ssp_task), tmf);
1385 }
1386
1387 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1388 {
1389         u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1390         int i;
1391
1392         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1393                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1394                 struct domain_device *device = sas_dev->sas_device;
1395                 struct asd_sas_port *sas_port;
1396                 struct hisi_sas_port *port;
1397                 struct hisi_sas_phy *phy = NULL;
1398                 struct asd_sas_phy *sas_phy;
1399
1400                 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1401                                 || !device || !device->port)
1402                         continue;
1403
1404                 sas_port = device->port;
1405                 port = to_hisi_sas_port(sas_port);
1406
1407                 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1408                         if (state & BIT(sas_phy->id)) {
1409                                 phy = sas_phy->lldd_phy;
1410                                 break;
1411                         }
1412
1413                 if (phy) {
1414                         port->id = phy->port_id;
1415
1416                         /* Update linkrate of directly attached device. */
1417                         if (!device->parent)
1418                                 device->linkrate = phy->sas_phy.linkrate;
1419
1420                         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1421                 } else
1422                         port->id = 0xff;
1423         }
1424 }
1425
1426 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1427                               u32 state)
1428 {
1429         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1430         struct asd_sas_port *_sas_port = NULL;
1431         int phy_no;
1432
1433         for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1434                 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1435                 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1436                 struct asd_sas_port *sas_port = sas_phy->port;
1437                 bool do_port_check = !!(_sas_port != sas_port);
1438
1439                 if (!sas_phy->phy->enabled)
1440                         continue;
1441
1442                 /* Report PHY state change to libsas */
1443                 if (state & BIT(phy_no)) {
1444                         if (do_port_check && sas_port && sas_port->port_dev) {
1445                                 struct domain_device *dev = sas_port->port_dev;
1446
1447                                 _sas_port = sas_port;
1448
1449                                 if (dev_is_expander(dev->dev_type))
1450                                         sas_ha->notify_port_event(sas_phy,
1451                                                         PORTE_BROADCAST_RCVD);
1452                         }
1453                 } else {
1454                         hisi_sas_phy_down(hisi_hba, phy_no, 0);
1455                 }
1456
1457         }
1458 }
1459
1460 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1461 {
1462         struct hisi_sas_device *sas_dev;
1463         struct domain_device *device;
1464         int i;
1465
1466         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1467                 sas_dev = &hisi_hba->devices[i];
1468                 device = sas_dev->sas_device;
1469
1470                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1471                         continue;
1472
1473                 hisi_sas_init_device(device);
1474         }
1475 }
1476
1477 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1478                                              struct asd_sas_port *sas_port,
1479                                              struct domain_device *device)
1480 {
1481         struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
1482         struct ata_port *ap = device->sata_dev.ap;
1483         struct device *dev = hisi_hba->dev;
1484         int s = sizeof(struct host_to_dev_fis);
1485         int rc = TMF_RESP_FUNC_FAILED;
1486         struct asd_sas_phy *sas_phy;
1487         struct ata_link *link;
1488         u8 fis[20] = {0};
1489         u32 state;
1490
1491         state = hisi_hba->hw->get_phys_state(hisi_hba);
1492         list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
1493                 if (!(state & BIT(sas_phy->id)))
1494                         continue;
1495
1496                 ata_for_each_link(link, ap, EDGE) {
1497                         int pmp = sata_srst_pmp(link);
1498
1499                         tmf_task.phy_id = sas_phy->id;
1500                         hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1501                         rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
1502                                                              &tmf_task);
1503                         if (rc != TMF_RESP_FUNC_COMPLETE) {
1504                                 dev_err(dev, "phy%d ata reset failed rc=%d\n",
1505                                         sas_phy->id, rc);
1506                                 break;
1507                         }
1508                 }
1509         }
1510 }
1511
1512 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1513 {
1514         struct device *dev = hisi_hba->dev;
1515         int port_no, rc, i;
1516
1517         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1518                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1519                 struct domain_device *device = sas_dev->sas_device;
1520
1521                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1522                         continue;
1523
1524                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1525                                                   HISI_SAS_INT_ABT_DEV, 0);
1526                 if (rc < 0)
1527                         dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1528         }
1529
1530         for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1531                 struct hisi_sas_port *port = &hisi_hba->port[port_no];
1532                 struct asd_sas_port *sas_port = &port->sas_port;
1533                 struct domain_device *port_dev = sas_port->port_dev;
1534                 struct domain_device *device;
1535
1536                 if (!port_dev || !dev_is_expander(port_dev->dev_type))
1537                         continue;
1538
1539                 /* Try to find a SATA device */
1540                 list_for_each_entry(device, &sas_port->dev_list,
1541                                     dev_list_node) {
1542                         if (dev_is_sata(device)) {
1543                                 hisi_sas_send_ata_reset_each_phy(hisi_hba,
1544                                                                  sas_port,
1545                                                                  device);
1546                                 break;
1547                         }
1548                 }
1549         }
1550 }
1551
1552 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1553 {
1554         struct Scsi_Host *shost = hisi_hba->shost;
1555
1556         down(&hisi_hba->sem);
1557         hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1558
1559         scsi_block_requests(shost);
1560         hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
1561
1562         if (timer_pending(&hisi_hba->timer))
1563                 del_timer_sync(&hisi_hba->timer);
1564
1565         set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1566 }
1567 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1568
1569 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1570 {
1571         struct Scsi_Host *shost = hisi_hba->shost;
1572         u32 state;
1573
1574         /* Init and wait for PHYs to come up and all libsas event finished. */
1575         hisi_hba->hw->phys_init(hisi_hba);
1576         msleep(1000);
1577         hisi_sas_refresh_port_id(hisi_hba);
1578         clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1579         up(&hisi_hba->sem);
1580
1581         if (hisi_hba->reject_stp_links_msk)
1582                 hisi_sas_terminate_stp_reject(hisi_hba);
1583         hisi_sas_reset_init_all_devices(hisi_hba);
1584         scsi_unblock_requests(shost);
1585         clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1586
1587         state = hisi_hba->hw->get_phys_state(hisi_hba);
1588         hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state, state);
1589 }
1590 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1591
1592 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1593 {
1594         struct device *dev = hisi_hba->dev;
1595         struct Scsi_Host *shost = hisi_hba->shost;
1596         int rc;
1597
1598         if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct)
1599                 queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
1600
1601         if (!hisi_hba->hw->soft_reset)
1602                 return -1;
1603
1604         if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1605                 return -1;
1606
1607         dev_info(dev, "controller resetting...\n");
1608         hisi_sas_controller_reset_prepare(hisi_hba);
1609
1610         rc = hisi_hba->hw->soft_reset(hisi_hba);
1611         if (rc) {
1612                 dev_warn(dev, "controller reset failed (%d)\n", rc);
1613                 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1614                 up(&hisi_hba->sem);
1615                 scsi_unblock_requests(shost);
1616                 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1617                 return rc;
1618         }
1619
1620         hisi_sas_controller_reset_done(hisi_hba);
1621         dev_info(dev, "controller reset complete\n");
1622
1623         return 0;
1624 }
1625
1626 static int hisi_sas_abort_task(struct sas_task *task)
1627 {
1628         struct scsi_lun lun;
1629         struct hisi_sas_tmf_task tmf_task;
1630         struct domain_device *device = task->dev;
1631         struct hisi_sas_device *sas_dev = device->lldd_dev;
1632         struct hisi_hba *hisi_hba;
1633         struct device *dev;
1634         int rc = TMF_RESP_FUNC_FAILED;
1635         unsigned long flags;
1636
1637         if (!sas_dev)
1638                 return TMF_RESP_FUNC_FAILED;
1639
1640         hisi_hba = dev_to_hisi_hba(task->dev);
1641         dev = hisi_hba->dev;
1642
1643         spin_lock_irqsave(&task->task_state_lock, flags);
1644         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1645                 struct hisi_sas_slot *slot = task->lldd_task;
1646                 struct hisi_sas_cq *cq;
1647
1648                 if (slot) {
1649                         /*
1650                          * flush tasklet to avoid free'ing task
1651                          * before using task in IO completion
1652                          */
1653                         cq = &hisi_hba->cq[slot->dlvry_queue];
1654                         tasklet_kill(&cq->tasklet);
1655                 }
1656                 spin_unlock_irqrestore(&task->task_state_lock, flags);
1657                 rc = TMF_RESP_FUNC_COMPLETE;
1658                 goto out;
1659         }
1660         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1661         spin_unlock_irqrestore(&task->task_state_lock, flags);
1662
1663         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1664                 struct scsi_cmnd *cmnd = task->uldd_task;
1665                 struct hisi_sas_slot *slot = task->lldd_task;
1666                 u16 tag = slot->idx;
1667                 int rc2;
1668
1669                 int_to_scsilun(cmnd->device->lun, &lun);
1670                 tmf_task.tmf = TMF_ABORT_TASK;
1671                 tmf_task.tag_of_task_to_be_managed = tag;
1672
1673                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1674                                                   &tmf_task);
1675
1676                 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1677                                                    HISI_SAS_INT_ABT_CMD, tag);
1678                 if (rc2 < 0) {
1679                         dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1680                         return TMF_RESP_FUNC_FAILED;
1681                 }
1682
1683                 /*
1684                  * If the TMF finds that the IO is not in the device and also
1685                  * the internal abort does not succeed, then it is safe to
1686                  * free the slot.
1687                  * Note: if the internal abort succeeds then the slot
1688                  * will have already been completed
1689                  */
1690                 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1691                         if (task->lldd_task)
1692                                 hisi_sas_do_release_task(hisi_hba, task, slot);
1693                 }
1694         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1695                 task->task_proto & SAS_PROTOCOL_STP) {
1696                 if (task->dev->dev_type == SAS_SATA_DEV) {
1697                         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1698                                                           HISI_SAS_INT_ABT_DEV,
1699                                                           0);
1700                         if (rc < 0) {
1701                                 dev_err(dev, "abort task: internal abort failed\n");
1702                                 goto out;
1703                         }
1704                         hisi_sas_dereg_device(hisi_hba, device);
1705                         rc = hisi_sas_softreset_ata_disk(device);
1706                 }
1707         } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1708                 /* SMP */
1709                 struct hisi_sas_slot *slot = task->lldd_task;
1710                 u32 tag = slot->idx;
1711                 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1712
1713                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1714                                                   HISI_SAS_INT_ABT_CMD, tag);
1715                 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1716                                         task->lldd_task) {
1717                         /*
1718                          * flush tasklet to avoid free'ing task
1719                          * before using task in IO completion
1720                          */
1721                         tasklet_kill(&cq->tasklet);
1722                         slot->task = NULL;
1723                 }
1724         }
1725
1726 out:
1727         if (rc != TMF_RESP_FUNC_COMPLETE)
1728                 dev_notice(dev, "abort task: rc=%d\n", rc);
1729         return rc;
1730 }
1731
1732 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1733 {
1734         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1735         struct device *dev = hisi_hba->dev;
1736         struct hisi_sas_tmf_task tmf_task;
1737         int rc;
1738
1739         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1740                                           HISI_SAS_INT_ABT_DEV, 0);
1741         if (rc < 0) {
1742                 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1743                 return TMF_RESP_FUNC_FAILED;
1744         }
1745         hisi_sas_dereg_device(hisi_hba, device);
1746
1747         tmf_task.tmf = TMF_ABORT_TASK_SET;
1748         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1749
1750         if (rc == TMF_RESP_FUNC_COMPLETE)
1751                 hisi_sas_release_task(hisi_hba, device);
1752
1753         return rc;
1754 }
1755
1756 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1757 {
1758         struct hisi_sas_tmf_task tmf_task;
1759         int rc;
1760
1761         tmf_task.tmf = TMF_CLEAR_ACA;
1762         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1763
1764         return rc;
1765 }
1766
1767 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1768 {
1769         struct sas_phy *local_phy = sas_get_local_phy(device);
1770         struct hisi_sas_device *sas_dev = device->lldd_dev;
1771         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1772         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1773         struct asd_sas_phy *sas_phy = sas_ha->sas_phy[local_phy->number];
1774         struct hisi_sas_phy *phy = container_of(sas_phy,
1775                         struct hisi_sas_phy, sas_phy);
1776         DECLARE_COMPLETION_ONSTACK(phyreset);
1777         int rc, reset_type;
1778
1779         if (scsi_is_sas_phy_local(local_phy)) {
1780                 phy->in_reset = 1;
1781                 phy->reset_completion = &phyreset;
1782         }
1783
1784         reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1785                       !dev_is_sata(device)) ? 1 : 0;
1786
1787         rc = sas_phy_reset(local_phy, reset_type);
1788         sas_put_local_phy(local_phy);
1789
1790         if (scsi_is_sas_phy_local(local_phy)) {
1791                 int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
1792                 unsigned long flags;
1793
1794                 spin_lock_irqsave(&phy->lock, flags);
1795                 phy->reset_completion = NULL;
1796                 phy->in_reset = 0;
1797                 spin_unlock_irqrestore(&phy->lock, flags);
1798
1799                 /* report PHY down if timed out */
1800                 if (!ret)
1801                         hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
1802         } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) {
1803                 /*
1804                  * If in init state, we rely on caller to wait for link to be
1805                  * ready; otherwise, delay.
1806                  */
1807                 msleep(2000);
1808         }
1809
1810         return rc;
1811 }
1812
1813 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1814 {
1815         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1816         struct device *dev = hisi_hba->dev;
1817         int rc;
1818
1819         rc = hisi_sas_internal_task_abort(hisi_hba, device,
1820                                           HISI_SAS_INT_ABT_DEV, 0);
1821         if (rc < 0) {
1822                 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1823                 return TMF_RESP_FUNC_FAILED;
1824         }
1825         hisi_sas_dereg_device(hisi_hba, device);
1826
1827         if (dev_is_sata(device)) {
1828                 rc = hisi_sas_softreset_ata_disk(device);
1829                 if (rc == TMF_RESP_FUNC_FAILED)
1830                         return TMF_RESP_FUNC_FAILED;
1831         }
1832
1833         rc = hisi_sas_debug_I_T_nexus_reset(device);
1834
1835         if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1836                 hisi_sas_release_task(hisi_hba, device);
1837
1838         return rc;
1839 }
1840
1841 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1842 {
1843         struct hisi_sas_device *sas_dev = device->lldd_dev;
1844         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1845         struct device *dev = hisi_hba->dev;
1846         int rc = TMF_RESP_FUNC_FAILED;
1847
1848         if (dev_is_sata(device)) {
1849                 struct sas_phy *phy;
1850
1851                 /* Clear internal IO and then hardreset */
1852                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1853                                                   HISI_SAS_INT_ABT_DEV, 0);
1854                 if (rc < 0) {
1855                         dev_err(dev, "lu_reset: internal abort failed\n");
1856                         goto out;
1857                 }
1858                 hisi_sas_dereg_device(hisi_hba, device);
1859
1860                 phy = sas_get_local_phy(device);
1861
1862                 rc = sas_phy_reset(phy, 1);
1863
1864                 if (rc == 0)
1865                         hisi_sas_release_task(hisi_hba, device);
1866                 sas_put_local_phy(phy);
1867         } else {
1868                 struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1869
1870                 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1871                                                   HISI_SAS_INT_ABT_DEV, 0);
1872                 if (rc < 0) {
1873                         dev_err(dev, "lu_reset: internal abort failed\n");
1874                         goto out;
1875                 }
1876                 hisi_sas_dereg_device(hisi_hba, device);
1877
1878                 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1879                 if (rc == TMF_RESP_FUNC_COMPLETE)
1880                         hisi_sas_release_task(hisi_hba, device);
1881         }
1882 out:
1883         if (rc != TMF_RESP_FUNC_COMPLETE)
1884                 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1885                              sas_dev->device_id, rc);
1886         return rc;
1887 }
1888
1889 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1890 {
1891         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1892         struct device *dev = hisi_hba->dev;
1893         HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1894         int rc, i;
1895
1896         queue_work(hisi_hba->wq, &r.work);
1897         wait_for_completion(r.completion);
1898         if (!r.done)
1899                 return TMF_RESP_FUNC_FAILED;
1900
1901         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1902                 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1903                 struct domain_device *device = sas_dev->sas_device;
1904
1905                 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1906                     dev_is_expander(device->dev_type))
1907                         continue;
1908
1909                 rc = hisi_sas_debug_I_T_nexus_reset(device);
1910                 if (rc != TMF_RESP_FUNC_COMPLETE)
1911                         dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
1912                                  sas_dev->device_id, rc);
1913         }
1914
1915         hisi_sas_release_tasks(hisi_hba);
1916
1917         return TMF_RESP_FUNC_COMPLETE;
1918 }
1919
1920 static int hisi_sas_query_task(struct sas_task *task)
1921 {
1922         struct scsi_lun lun;
1923         struct hisi_sas_tmf_task tmf_task;
1924         int rc = TMF_RESP_FUNC_FAILED;
1925
1926         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1927                 struct scsi_cmnd *cmnd = task->uldd_task;
1928                 struct domain_device *device = task->dev;
1929                 struct hisi_sas_slot *slot = task->lldd_task;
1930                 u32 tag = slot->idx;
1931
1932                 int_to_scsilun(cmnd->device->lun, &lun);
1933                 tmf_task.tmf = TMF_QUERY_TASK;
1934                 tmf_task.tag_of_task_to_be_managed = tag;
1935
1936                 rc = hisi_sas_debug_issue_ssp_tmf(device,
1937                                                   lun.scsi_lun,
1938                                                   &tmf_task);
1939                 switch (rc) {
1940                 /* The task is still in Lun, release it then */
1941                 case TMF_RESP_FUNC_SUCC:
1942                 /* The task is not in Lun or failed, reset the phy */
1943                 case TMF_RESP_FUNC_FAILED:
1944                 case TMF_RESP_FUNC_COMPLETE:
1945                         break;
1946                 default:
1947                         rc = TMF_RESP_FUNC_FAILED;
1948                         break;
1949                 }
1950         }
1951         return rc;
1952 }
1953
1954 static int
1955 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1956                                   struct sas_task *task, int abort_flag,
1957                                   int task_tag, struct hisi_sas_dq *dq)
1958 {
1959         struct domain_device *device = task->dev;
1960         struct hisi_sas_device *sas_dev = device->lldd_dev;
1961         struct device *dev = hisi_hba->dev;
1962         struct hisi_sas_port *port;
1963         struct hisi_sas_slot *slot;
1964         struct asd_sas_port *sas_port = device->port;
1965         struct hisi_sas_cmd_hdr *cmd_hdr_base;
1966         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1967         unsigned long flags, flags_dq = 0;
1968         int wr_q_index;
1969
1970         if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1971                 return -EINVAL;
1972
1973         if (!device->port)
1974                 return -1;
1975
1976         port = to_hisi_sas_port(sas_port);
1977
1978         /* simply get a slot and send abort command */
1979         rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
1980         if (rc < 0)
1981                 goto err_out;
1982
1983         slot_idx = rc;
1984         slot = &hisi_hba->slot_info[slot_idx];
1985
1986         spin_lock_irqsave(&dq->lock, flags_dq);
1987         wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1988         if (wr_q_index < 0) {
1989                 spin_unlock_irqrestore(&dq->lock, flags_dq);
1990                 rc = -EAGAIN;
1991                 goto err_out_tag;
1992         }
1993         list_add_tail(&slot->delivery, &dq->list);
1994         spin_unlock_irqrestore(&dq->lock, flags_dq);
1995         spin_lock_irqsave(&sas_dev->lock, flags);
1996         list_add_tail(&slot->entry, &sas_dev->list);
1997         spin_unlock_irqrestore(&sas_dev->lock, flags);
1998
1999         dlvry_queue = dq->id;
2000         dlvry_queue_slot = wr_q_index;
2001
2002         slot->device_id = sas_dev->device_id;
2003         slot->n_elem = n_elem;
2004         slot->dlvry_queue = dlvry_queue;
2005         slot->dlvry_queue_slot = dlvry_queue_slot;
2006         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
2007         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
2008         slot->task = task;
2009         slot->port = port;
2010         slot->is_internal = true;
2011         task->lldd_task = slot;
2012
2013         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
2014         memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
2015         memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
2016
2017         hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
2018                                       abort_flag, task_tag);
2019
2020         spin_lock_irqsave(&task->task_state_lock, flags);
2021         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
2022         spin_unlock_irqrestore(&task->task_state_lock, flags);
2023         WRITE_ONCE(slot->ready, 1);
2024         /* send abort command to the chip */
2025         spin_lock_irqsave(&dq->lock, flags);
2026         hisi_hba->hw->start_delivery(dq);
2027         spin_unlock_irqrestore(&dq->lock, flags);
2028
2029         return 0;
2030
2031 err_out_tag:
2032         hisi_sas_slot_index_free(hisi_hba, slot_idx);
2033 err_out:
2034         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
2035
2036         return rc;
2037 }
2038
2039 /**
2040  * _hisi_sas_internal_task_abort -- execute an internal
2041  * abort command for single IO command or a device
2042  * @hisi_hba: host controller struct
2043  * @device: domain device
2044  * @abort_flag: mode of operation, device or single IO
2045  * @tag: tag of IO to be aborted (only relevant to single
2046  *       IO mode)
2047  * @dq: delivery queue for this internal abort command
2048  */
2049 static int
2050 _hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2051                               struct domain_device *device, int abort_flag,
2052                               int tag, struct hisi_sas_dq *dq)
2053 {
2054         struct sas_task *task;
2055         struct hisi_sas_device *sas_dev = device->lldd_dev;
2056         struct device *dev = hisi_hba->dev;
2057         int res;
2058
2059         /*
2060          * The interface is not realized means this HW don't support internal
2061          * abort, or don't need to do internal abort. Then here, we return
2062          * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
2063          * the internal abort has been executed and returned CQ.
2064          */
2065         if (!hisi_hba->hw->prep_abort)
2066                 return TMF_RESP_FUNC_FAILED;
2067
2068         task = sas_alloc_slow_task(GFP_KERNEL);
2069         if (!task)
2070                 return -ENOMEM;
2071
2072         task->dev = device;
2073         task->task_proto = device->tproto;
2074         task->task_done = hisi_sas_task_done;
2075         task->slow_task->timer.function = hisi_sas_tmf_timedout;
2076         task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT * HZ;
2077         add_timer(&task->slow_task->timer);
2078
2079         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
2080                                                 task, abort_flag, tag, dq);
2081         if (res) {
2082                 del_timer(&task->slow_task->timer);
2083                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
2084                         res);
2085                 goto exit;
2086         }
2087         wait_for_completion(&task->slow_task->completion);
2088         res = TMF_RESP_FUNC_FAILED;
2089
2090         /* Internal abort timed out */
2091         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
2092                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
2093                         struct hisi_sas_slot *slot = task->lldd_task;
2094
2095                         if (slot) {
2096                                 struct hisi_sas_cq *cq =
2097                                         &hisi_hba->cq[slot->dlvry_queue];
2098                                 /*
2099                                  * flush tasklet to avoid free'ing task
2100                                  * before using task in IO completion
2101                                  */
2102                                 tasklet_kill(&cq->tasklet);
2103                                 slot->task = NULL;
2104                         }
2105                         dev_err(dev, "internal task abort: timeout and not done.\n");
2106
2107                         res = -EIO;
2108                         goto exit;
2109                 } else
2110                         dev_err(dev, "internal task abort: timeout.\n");
2111         }
2112
2113         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2114                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
2115                 res = TMF_RESP_FUNC_COMPLETE;
2116                 goto exit;
2117         }
2118
2119         if (task->task_status.resp == SAS_TASK_COMPLETE &&
2120                 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
2121                 res = TMF_RESP_FUNC_SUCC;
2122                 goto exit;
2123         }
2124
2125 exit:
2126         dev_dbg(dev, "internal task abort: task to dev %016llx task=%p resp: 0x%x sts 0x%x\n",
2127                 SAS_ADDR(device->sas_addr), task,
2128                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
2129                 task->task_status.stat);
2130         sas_free_task(task);
2131
2132         return res;
2133 }
2134
2135 static int
2136 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
2137                              struct domain_device *device,
2138                              int abort_flag, int tag)
2139 {
2140         struct hisi_sas_slot *slot;
2141         struct device *dev = hisi_hba->dev;
2142         struct hisi_sas_dq *dq;
2143         int i, rc;
2144
2145         switch (abort_flag) {
2146         case HISI_SAS_INT_ABT_CMD:
2147                 slot = &hisi_hba->slot_info[tag];
2148                 dq = &hisi_hba->dq[slot->dlvry_queue];
2149                 return _hisi_sas_internal_task_abort(hisi_hba, device,
2150                                                      abort_flag, tag, dq);
2151         case HISI_SAS_INT_ABT_DEV:
2152                 for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2153                         struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2154                         const struct cpumask *mask = cq->pci_irq_mask;
2155
2156                         if (mask && !cpumask_intersects(cpu_online_mask, mask))
2157                                 continue;
2158                         dq = &hisi_hba->dq[i];
2159                         rc = _hisi_sas_internal_task_abort(hisi_hba, device,
2160                                                            abort_flag, tag,
2161                                                            dq);
2162                         if (rc)
2163                                 return rc;
2164                 }
2165                 break;
2166         default:
2167                 dev_err(dev, "Unrecognised internal abort flag (%d)\n",
2168                         abort_flag);
2169                 return -EINVAL;
2170         }
2171
2172         return 0;
2173 }
2174
2175 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2176 {
2177         hisi_sas_port_notify_formed(sas_phy);
2178 }
2179
2180 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2181                         u8 reg_index, u8 reg_count, u8 *write_data)
2182 {
2183         struct hisi_hba *hisi_hba = sha->lldd_ha;
2184
2185         if (!hisi_hba->hw->write_gpio)
2186                 return -EOPNOTSUPP;
2187
2188         return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2189                                 reg_index, reg_count, write_data);
2190 }
2191
2192 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2193 {
2194         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2195         struct sas_phy *sphy = sas_phy->phy;
2196         unsigned long flags;
2197
2198         phy->phy_attached = 0;
2199         phy->phy_type = 0;
2200         phy->port = NULL;
2201
2202         spin_lock_irqsave(&phy->lock, flags);
2203         if (phy->enable)
2204                 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2205         else
2206                 sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2207         spin_unlock_irqrestore(&phy->lock, flags);
2208 }
2209
2210 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
2211 {
2212         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2213         struct asd_sas_phy *sas_phy = &phy->sas_phy;
2214         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
2215         struct device *dev = hisi_hba->dev;
2216
2217         if (rdy) {
2218                 /* Phy down but ready */
2219                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
2220                 hisi_sas_port_notify_formed(sas_phy);
2221         } else {
2222                 struct hisi_sas_port *port  = phy->port;
2223
2224                 if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
2225                     phy->in_reset) {
2226                         dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2227                         return;
2228                 }
2229                 /* Phy down and not ready */
2230                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
2231                 sas_phy_disconnected(sas_phy);
2232
2233                 if (port) {
2234                         if (phy->phy_type & PORT_TYPE_SAS) {
2235                                 int port_id = port->id;
2236
2237                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2238                                                                        port_id))
2239                                         port->port_attached = 0;
2240                         } else if (phy->phy_type & PORT_TYPE_SATA)
2241                                 port->port_attached = 0;
2242                 }
2243                 hisi_sas_phy_disconnected(phy);
2244         }
2245 }
2246 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2247
2248 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
2249 {
2250         int i;
2251
2252         for (i = 0; i < hisi_hba->cq_nvecs; i++) {
2253                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2254
2255                 tasklet_kill(&cq->tasklet);
2256         }
2257 }
2258 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
2259
2260 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2261 {
2262         struct hisi_hba *hisi_hba = shost_priv(shost);
2263
2264         if (reset_type != SCSI_ADAPTER_RESET)
2265                 return -EOPNOTSUPP;
2266
2267         queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2268
2269         return 0;
2270 }
2271 EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2272
2273 struct scsi_transport_template *hisi_sas_stt;
2274 EXPORT_SYMBOL_GPL(hisi_sas_stt);
2275
2276 static struct sas_domain_function_template hisi_sas_transport_ops = {
2277         .lldd_dev_found         = hisi_sas_dev_found,
2278         .lldd_dev_gone          = hisi_sas_dev_gone,
2279         .lldd_execute_task      = hisi_sas_queue_command,
2280         .lldd_control_phy       = hisi_sas_control_phy,
2281         .lldd_abort_task        = hisi_sas_abort_task,
2282         .lldd_abort_task_set    = hisi_sas_abort_task_set,
2283         .lldd_clear_aca         = hisi_sas_clear_aca,
2284         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
2285         .lldd_lu_reset          = hisi_sas_lu_reset,
2286         .lldd_query_task        = hisi_sas_query_task,
2287         .lldd_clear_nexus_ha    = hisi_sas_clear_nexus_ha,
2288         .lldd_port_formed       = hisi_sas_port_formed,
2289         .lldd_write_gpio        = hisi_sas_write_gpio,
2290 };
2291
2292 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2293 {
2294         int i, s, j, max_command_entries = hisi_hba->hw->max_command_entries;
2295         struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2296
2297         for (i = 0; i < hisi_hba->queue_count; i++) {
2298                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2299                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2300                 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2301
2302                 s = sizeof(struct hisi_sas_cmd_hdr);
2303                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2304                         memset(&cmd_hdr[j], 0, s);
2305
2306                 dq->wr_point = 0;
2307
2308                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2309                 memset(hisi_hba->complete_hdr[i], 0, s);
2310                 cq->rd_point = 0;
2311         }
2312
2313         s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2314         memset(hisi_hba->initial_fis, 0, s);
2315
2316         s = max_command_entries * sizeof(struct hisi_sas_iost);
2317         memset(hisi_hba->iost, 0, s);
2318
2319         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2320         memset(hisi_hba->breakpoint, 0, s);
2321
2322         s = sizeof(struct hisi_sas_sata_breakpoint);
2323         for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2324                 memset(&sata_breakpoint[j], 0, s);
2325 }
2326 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2327
2328 int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2329 {
2330         struct device *dev = hisi_hba->dev;
2331         int i, j, s, max_command_entries = hisi_hba->hw->max_command_entries;
2332         int max_command_entries_ru, sz_slot_buf_ru;
2333         int blk_cnt, slots_per_blk;
2334
2335         sema_init(&hisi_hba->sem, 1);
2336         spin_lock_init(&hisi_hba->lock);
2337         for (i = 0; i < hisi_hba->n_phy; i++) {
2338                 hisi_sas_phy_init(hisi_hba, i);
2339                 hisi_hba->port[i].port_attached = 0;
2340                 hisi_hba->port[i].id = -1;
2341         }
2342
2343         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2344                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2345                 hisi_hba->devices[i].device_id = i;
2346                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2347         }
2348
2349         for (i = 0; i < hisi_hba->queue_count; i++) {
2350                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2351                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2352
2353                 /* Completion queue structure */
2354                 cq->id = i;
2355                 cq->hisi_hba = hisi_hba;
2356
2357                 /* Delivery queue structure */
2358                 spin_lock_init(&dq->lock);
2359                 INIT_LIST_HEAD(&dq->list);
2360                 dq->id = i;
2361                 dq->hisi_hba = hisi_hba;
2362
2363                 /* Delivery queue */
2364                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2365                 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2366                                                 &hisi_hba->cmd_hdr_dma[i],
2367                                                 GFP_KERNEL);
2368                 if (!hisi_hba->cmd_hdr[i])
2369                         goto err_out;
2370
2371                 /* Completion queue */
2372                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2373                 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2374                                                 &hisi_hba->complete_hdr_dma[i],
2375                                                 GFP_KERNEL);
2376                 if (!hisi_hba->complete_hdr[i])
2377                         goto err_out;
2378         }
2379
2380         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2381         hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2382                                              GFP_KERNEL | __GFP_ZERO);
2383         if (!hisi_hba->itct)
2384                 goto err_out;
2385
2386         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2387                                            sizeof(struct hisi_sas_slot),
2388                                            GFP_KERNEL);
2389         if (!hisi_hba->slot_info)
2390                 goto err_out;
2391
2392         /* roundup to avoid overly large block size */
2393         max_command_entries_ru = roundup(max_command_entries, 64);
2394         if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2395                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2396         else
2397                 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2398         sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);
2399         s = lcm(max_command_entries_ru, sz_slot_buf_ru);
2400         blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2401         slots_per_blk = s / sz_slot_buf_ru;
2402
2403         for (i = 0; i < blk_cnt; i++) {
2404                 int slot_index = i * slots_per_blk;
2405                 dma_addr_t buf_dma;
2406                 void *buf;
2407
2408                 buf = dmam_alloc_coherent(dev, s, &buf_dma,
2409                                           GFP_KERNEL | __GFP_ZERO);
2410                 if (!buf)
2411                         goto err_out;
2412
2413                 for (j = 0; j < slots_per_blk; j++, slot_index++) {
2414                         struct hisi_sas_slot *slot;
2415
2416                         slot = &hisi_hba->slot_info[slot_index];
2417                         slot->buf = buf;
2418                         slot->buf_dma = buf_dma;
2419                         slot->idx = slot_index;
2420
2421                         buf += sz_slot_buf_ru;
2422                         buf_dma += sz_slot_buf_ru;
2423                 }
2424         }
2425
2426         s = max_command_entries * sizeof(struct hisi_sas_iost);
2427         hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2428                                              GFP_KERNEL);
2429         if (!hisi_hba->iost)
2430                 goto err_out;
2431
2432         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2433         hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2434                                                    &hisi_hba->breakpoint_dma,
2435                                                    GFP_KERNEL);
2436         if (!hisi_hba->breakpoint)
2437                 goto err_out;
2438
2439         hisi_hba->slot_index_count = max_command_entries;
2440         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
2441         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
2442         if (!hisi_hba->slot_index_tags)
2443                 goto err_out;
2444
2445         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2446         hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2447                                                     &hisi_hba->initial_fis_dma,
2448                                                     GFP_KERNEL);
2449         if (!hisi_hba->initial_fis)
2450                 goto err_out;
2451
2452         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2453         hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2454                                         &hisi_hba->sata_breakpoint_dma,
2455                                         GFP_KERNEL);
2456         if (!hisi_hba->sata_breakpoint)
2457                 goto err_out;
2458         hisi_sas_init_mem(hisi_hba);
2459
2460         hisi_sas_slot_index_init(hisi_hba);
2461         hisi_hba->last_slot_index = hisi_hba->hw->max_command_entries -
2462                 HISI_SAS_RESERVED_IPTT_CNT;
2463
2464         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
2465         if (!hisi_hba->wq) {
2466                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
2467                 goto err_out;
2468         }
2469
2470         return 0;
2471 err_out:
2472         return -ENOMEM;
2473 }
2474 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2475
2476 void hisi_sas_free(struct hisi_hba *hisi_hba)
2477 {
2478         int i;
2479
2480         for (i = 0; i < hisi_hba->n_phy; i++) {
2481                 struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2482
2483                 del_timer_sync(&phy->timer);
2484         }
2485
2486         if (hisi_hba->wq)
2487                 destroy_workqueue(hisi_hba->wq);
2488 }
2489 EXPORT_SYMBOL_GPL(hisi_sas_free);
2490
2491 void hisi_sas_rst_work_handler(struct work_struct *work)
2492 {
2493         struct hisi_hba *hisi_hba =
2494                 container_of(work, struct hisi_hba, rst_work);
2495
2496         hisi_sas_controller_reset(hisi_hba);
2497 }
2498 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2499
2500 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2501 {
2502         struct hisi_sas_rst *rst =
2503                 container_of(work, struct hisi_sas_rst, work);
2504
2505         if (!hisi_sas_controller_reset(rst->hisi_hba))
2506                 rst->done = true;
2507         complete(rst->completion);
2508 }
2509 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2510
2511 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2512 {
2513         struct device *dev = hisi_hba->dev;
2514         struct platform_device *pdev = hisi_hba->platform_dev;
2515         struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2516         struct clk *refclk;
2517
2518         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2519                                           SAS_ADDR_SIZE)) {
2520                 dev_err(dev, "could not get property sas-addr\n");
2521                 return -ENOENT;
2522         }
2523
2524         if (np) {
2525                 /*
2526                  * These properties are only required for platform device-based
2527                  * controller with DT firmware.
2528                  */
2529                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2530                                         "hisilicon,sas-syscon");
2531                 if (IS_ERR(hisi_hba->ctrl)) {
2532                         dev_err(dev, "could not get syscon\n");
2533                         return -ENOENT;
2534                 }
2535
2536                 if (device_property_read_u32(dev, "ctrl-reset-reg",
2537                                              &hisi_hba->ctrl_reset_reg)) {
2538                         dev_err(dev, "could not get property ctrl-reset-reg\n");
2539                         return -ENOENT;
2540                 }
2541
2542                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2543                                              &hisi_hba->ctrl_reset_sts_reg)) {
2544                         dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2545                         return -ENOENT;
2546                 }
2547
2548                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2549                                              &hisi_hba->ctrl_clock_ena_reg)) {
2550                         dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2551                         return -ENOENT;
2552                 }
2553         }
2554
2555         refclk = devm_clk_get(dev, NULL);
2556         if (IS_ERR(refclk))
2557                 dev_dbg(dev, "no ref clk property\n");
2558         else
2559                 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
2560
2561         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2562                 dev_err(dev, "could not get property phy-count\n");
2563                 return -ENOENT;
2564         }
2565
2566         if (device_property_read_u32(dev, "queue-count",
2567                                      &hisi_hba->queue_count)) {
2568                 dev_err(dev, "could not get property queue-count\n");
2569                 return -ENOENT;
2570         }
2571
2572         return 0;
2573 }
2574 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2575
2576 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2577                                               const struct hisi_sas_hw *hw)
2578 {
2579         struct resource *res;
2580         struct Scsi_Host *shost;
2581         struct hisi_hba *hisi_hba;
2582         struct device *dev = &pdev->dev;
2583         int error;
2584
2585         shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2586         if (!shost) {
2587                 dev_err(dev, "scsi host alloc failed\n");
2588                 return NULL;
2589         }
2590         hisi_hba = shost_priv(shost);
2591
2592         INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2593         hisi_hba->hw = hw;
2594         hisi_hba->dev = dev;
2595         hisi_hba->platform_dev = pdev;
2596         hisi_hba->shost = shost;
2597         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2598
2599         timer_setup(&hisi_hba->timer, NULL, 0);
2600
2601         if (hisi_sas_get_fw_info(hisi_hba) < 0)
2602                 goto err_out;
2603
2604         error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2605         if (error)
2606                 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
2607
2608         if (error) {
2609                 dev_err(dev, "No usable DMA addressing method\n");
2610                 goto err_out;
2611         }
2612
2613         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2614         hisi_hba->regs = devm_ioremap_resource(dev, res);
2615         if (IS_ERR(hisi_hba->regs))
2616                 goto err_out;
2617
2618         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2619         if (res) {
2620                 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2621                 if (IS_ERR(hisi_hba->sgpio_regs))
2622                         goto err_out;
2623         }
2624
2625         if (hisi_sas_alloc(hisi_hba)) {
2626                 hisi_sas_free(hisi_hba);
2627                 goto err_out;
2628         }
2629
2630         return shost;
2631 err_out:
2632         scsi_host_put(shost);
2633         dev_err(dev, "shost alloc failed\n");
2634         return NULL;
2635 }
2636
2637 int hisi_sas_probe(struct platform_device *pdev,
2638                    const struct hisi_sas_hw *hw)
2639 {
2640         struct Scsi_Host *shost;
2641         struct hisi_hba *hisi_hba;
2642         struct device *dev = &pdev->dev;
2643         struct asd_sas_phy **arr_phy;
2644         struct asd_sas_port **arr_port;
2645         struct sas_ha_struct *sha;
2646         int rc, phy_nr, port_nr, i;
2647
2648         shost = hisi_sas_shost_alloc(pdev, hw);
2649         if (!shost)
2650                 return -ENOMEM;
2651
2652         sha = SHOST_TO_SAS_HA(shost);
2653         hisi_hba = shost_priv(shost);
2654         platform_set_drvdata(pdev, sha);
2655
2656         phy_nr = port_nr = hisi_hba->n_phy;
2657
2658         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2659         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2660         if (!arr_phy || !arr_port) {
2661                 rc = -ENOMEM;
2662                 goto err_out_ha;
2663         }
2664
2665         sha->sas_phy = arr_phy;
2666         sha->sas_port = arr_port;
2667         sha->lldd_ha = hisi_hba;
2668
2669         shost->transportt = hisi_sas_stt;
2670         shost->max_id = HISI_SAS_MAX_DEVICES;
2671         shost->max_lun = ~0;
2672         shost->max_channel = 1;
2673         shost->max_cmd_len = 16;
2674         if (hisi_hba->hw->slot_index_alloc) {
2675                 shost->can_queue = hisi_hba->hw->max_command_entries;
2676                 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2677         } else {
2678                 shost->can_queue = hisi_hba->hw->max_command_entries -
2679                         HISI_SAS_RESERVED_IPTT_CNT;
2680                 shost->cmd_per_lun = hisi_hba->hw->max_command_entries -
2681                         HISI_SAS_RESERVED_IPTT_CNT;
2682         }
2683
2684         sha->sas_ha_name = DRV_NAME;
2685         sha->dev = hisi_hba->dev;
2686         sha->lldd_module = THIS_MODULE;
2687         sha->sas_addr = &hisi_hba->sas_addr[0];
2688         sha->num_phys = hisi_hba->n_phy;
2689         sha->core.shost = hisi_hba->shost;
2690
2691         for (i = 0; i < hisi_hba->n_phy; i++) {
2692                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2693                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2694         }
2695
2696         rc = scsi_add_host(shost, &pdev->dev);
2697         if (rc)
2698                 goto err_out_ha;
2699
2700         rc = sas_register_ha(sha);
2701         if (rc)
2702                 goto err_out_register_ha;
2703
2704         rc = hisi_hba->hw->hw_init(hisi_hba);
2705         if (rc)
2706                 goto err_out_register_ha;
2707
2708         scsi_scan_host(shost);
2709
2710         return 0;
2711
2712 err_out_register_ha:
2713         scsi_remove_host(shost);
2714 err_out_ha:
2715         hisi_sas_free(hisi_hba);
2716         scsi_host_put(shost);
2717         return rc;
2718 }
2719 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2720
2721 struct dentry *hisi_sas_debugfs_dir;
2722
2723 static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
2724 {
2725         int queue_entry_size = hisi_hba->hw->complete_hdr_size;
2726         int i;
2727
2728         for (i = 0; i < hisi_hba->queue_count; i++)
2729                 memcpy(hisi_hba->debugfs_complete_hdr[i],
2730                        hisi_hba->complete_hdr[i],
2731                        HISI_SAS_QUEUE_SLOTS * queue_entry_size);
2732 }
2733
2734 static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
2735 {
2736         int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
2737         int i;
2738
2739         for (i = 0; i < hisi_hba->queue_count; i++) {
2740                 struct hisi_sas_cmd_hdr *debugfs_cmd_hdr, *cmd_hdr;
2741                 int j;
2742
2743                 debugfs_cmd_hdr = hisi_hba->debugfs_cmd_hdr[i];
2744                 cmd_hdr = hisi_hba->cmd_hdr[i];
2745
2746                 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2747                         memcpy(&debugfs_cmd_hdr[j], &cmd_hdr[j],
2748                                queue_entry_size);
2749         }
2750 }
2751
2752 static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
2753 {
2754         const struct hisi_sas_debugfs_reg *port =
2755                 hisi_hba->hw->debugfs_reg_port;
2756         int i, phy_cnt;
2757         u32 offset;
2758         u32 *databuf;
2759
2760         for (phy_cnt = 0; phy_cnt < hisi_hba->n_phy; phy_cnt++) {
2761                 databuf = (u32 *)hisi_hba->debugfs_port_reg[phy_cnt];
2762                 for (i = 0; i < port->count; i++, databuf++) {
2763                         offset = port->base_off + 4 * i;
2764                         *databuf = port->read_port_reg(hisi_hba, phy_cnt,
2765                                                        offset);
2766                 }
2767         }
2768 }
2769
2770 static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
2771 {
2772         u32 *databuf = (u32 *)hisi_hba->debugfs_global_reg;
2773         const struct hisi_sas_debugfs_reg *global =
2774                 hisi_hba->hw->debugfs_reg_global;
2775         int i;
2776
2777         for (i = 0; i < global->count; i++, databuf++)
2778                 *databuf = global->read_global_reg(hisi_hba, 4 * i);
2779 }
2780
2781 static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
2782 {
2783         void *databuf = hisi_hba->debugfs_itct;
2784         struct hisi_sas_itct *itct;
2785         int i;
2786
2787         itct = hisi_hba->itct;
2788
2789         for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
2790                 memcpy(databuf, itct, sizeof(struct hisi_sas_itct));
2791                 databuf += sizeof(struct hisi_sas_itct);
2792         }
2793 }
2794
2795 static void hisi_sas_debugfs_snapshot_iost_reg(struct hisi_hba *hisi_hba)
2796 {
2797         int max_command_entries = hisi_hba->hw->max_command_entries;
2798         void *databuf = hisi_hba->debugfs_iost;
2799         struct hisi_sas_iost *iost;
2800         int i;
2801
2802         iost = hisi_hba->iost;
2803
2804         for (i = 0; i < max_command_entries; i++, iost++) {
2805                 memcpy(databuf, iost, sizeof(struct hisi_sas_iost));
2806                 databuf += sizeof(struct hisi_sas_iost);
2807         }
2808 }
2809
2810 static const char *
2811 hisi_sas_debugfs_to_reg_name(int off, int base_off,
2812                              const struct hisi_sas_debugfs_reg_lu *lu)
2813 {
2814         for (; lu->name; lu++) {
2815                 if (off == lu->off - base_off)
2816                         return lu->name;
2817         }
2818
2819         return NULL;
2820 }
2821
2822 static void hisi_sas_debugfs_print_reg(u32 *regs_val, const void *ptr,
2823                                        struct seq_file *s)
2824 {
2825         const struct hisi_sas_debugfs_reg *reg = ptr;
2826         int i;
2827
2828         for (i = 0; i < reg->count; i++) {
2829                 int off = i * 4;
2830                 const char *name;
2831
2832                 name = hisi_sas_debugfs_to_reg_name(off, reg->base_off,
2833                                                     reg->lu);
2834
2835                 if (name)
2836                         seq_printf(s, "0x%08x 0x%08x %s\n", off,
2837                                    regs_val[i], name);
2838                 else
2839                         seq_printf(s, "0x%08x 0x%08x\n", off,
2840                                    regs_val[i]);
2841         }
2842 }
2843
2844 static int hisi_sas_debugfs_global_show(struct seq_file *s, void *p)
2845 {
2846         struct hisi_hba *hisi_hba = s->private;
2847         const struct hisi_sas_hw *hw = hisi_hba->hw;
2848         const struct hisi_sas_debugfs_reg *reg_global = hw->debugfs_reg_global;
2849
2850         hisi_sas_debugfs_print_reg(hisi_hba->debugfs_global_reg,
2851                                    reg_global, s);
2852
2853         return 0;
2854 }
2855
2856 static int hisi_sas_debugfs_global_open(struct inode *inode, struct file *filp)
2857 {
2858         return single_open(filp, hisi_sas_debugfs_global_show,
2859                            inode->i_private);
2860 }
2861
2862 static const struct file_operations hisi_sas_debugfs_global_fops = {
2863         .open = hisi_sas_debugfs_global_open,
2864         .read = seq_read,
2865         .llseek = seq_lseek,
2866         .release = single_release,
2867         .owner = THIS_MODULE,
2868 };
2869
2870 static int hisi_sas_debugfs_port_show(struct seq_file *s, void *p)
2871 {
2872         struct hisi_sas_phy *phy = s->private;
2873         struct hisi_hba *hisi_hba = phy->hisi_hba;
2874         const struct hisi_sas_hw *hw = hisi_hba->hw;
2875         const struct hisi_sas_debugfs_reg *reg_port = hw->debugfs_reg_port;
2876         u32 *databuf = hisi_hba->debugfs_port_reg[phy->sas_phy.id];
2877
2878         hisi_sas_debugfs_print_reg(databuf, reg_port, s);
2879
2880         return 0;
2881 }
2882
2883 static int hisi_sas_debugfs_port_open(struct inode *inode, struct file *filp)
2884 {
2885         return single_open(filp, hisi_sas_debugfs_port_show, inode->i_private);
2886 }
2887
2888 static const struct file_operations hisi_sas_debugfs_port_fops = {
2889         .open = hisi_sas_debugfs_port_open,
2890         .read = seq_read,
2891         .llseek = seq_lseek,
2892         .release = single_release,
2893         .owner = THIS_MODULE,
2894 };
2895
2896 static int hisi_sas_show_row_64(struct seq_file *s, int index,
2897                                 int sz, __le64 *ptr)
2898 {
2899         int i;
2900
2901         /* completion header size not fixed per HW version */
2902         seq_printf(s, "index %04d:\n\t", index);
2903         for (i = 1; i <= sz / 8; i++, ptr++) {
2904                 seq_printf(s, " 0x%016llx", le64_to_cpu(*ptr));
2905                 if (!(i % 2))
2906                         seq_puts(s, "\n\t");
2907         }
2908
2909         seq_puts(s, "\n");
2910
2911         return 0;
2912 }
2913
2914 static int hisi_sas_show_row_32(struct seq_file *s, int index,
2915                                 int sz, __le32 *ptr)
2916 {
2917         int i;
2918
2919         /* completion header size not fixed per HW version */
2920         seq_printf(s, "index %04d:\n\t", index);
2921         for (i = 1; i <= sz / 4; i++, ptr++) {
2922                 seq_printf(s, " 0x%08x", le32_to_cpu(*ptr));
2923                 if (!(i % 4))
2924                         seq_puts(s, "\n\t");
2925         }
2926         seq_puts(s, "\n");
2927
2928         return 0;
2929 }
2930
2931 static int hisi_sas_cq_show_slot(struct seq_file *s, int slot, void *cq_ptr)
2932 {
2933         struct hisi_sas_cq *cq = cq_ptr;
2934         struct hisi_hba *hisi_hba = cq->hisi_hba;
2935         void *complete_queue = hisi_hba->debugfs_complete_hdr[cq->id];
2936         __le32 *complete_hdr = complete_queue +
2937                         (hisi_hba->hw->complete_hdr_size * slot);
2938
2939         return hisi_sas_show_row_32(s, slot,
2940                                 hisi_hba->hw->complete_hdr_size,
2941                                 complete_hdr);
2942 }
2943
2944 static int hisi_sas_debugfs_cq_show(struct seq_file *s, void *p)
2945 {
2946         struct hisi_sas_cq *cq = s->private;
2947         int slot, ret;
2948
2949         for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
2950                 ret = hisi_sas_cq_show_slot(s, slot, cq);
2951                 if (ret)
2952                         return ret;
2953         }
2954         return 0;
2955 }
2956
2957 static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
2958 {
2959         return single_open(filp, hisi_sas_debugfs_cq_show, inode->i_private);
2960 }
2961
2962 static const struct file_operations hisi_sas_debugfs_cq_fops = {
2963         .open = hisi_sas_debugfs_cq_open,
2964         .read = seq_read,
2965         .llseek = seq_lseek,
2966         .release = single_release,
2967         .owner = THIS_MODULE,
2968 };
2969
2970 static int hisi_sas_dq_show_slot(struct seq_file *s, int slot, void *dq_ptr)
2971 {
2972         struct hisi_sas_dq *dq = dq_ptr;
2973         struct hisi_hba *hisi_hba = dq->hisi_hba;
2974         void *cmd_queue = hisi_hba->debugfs_cmd_hdr[dq->id];
2975         __le32 *cmd_hdr = cmd_queue +
2976                 sizeof(struct hisi_sas_cmd_hdr) * slot;
2977
2978         return hisi_sas_show_row_32(s, slot, sizeof(struct hisi_sas_cmd_hdr),
2979                                     cmd_hdr);
2980 }
2981
2982 static int hisi_sas_debugfs_dq_show(struct seq_file *s, void *p)
2983 {
2984         int slot, ret;
2985
2986         for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
2987                 ret = hisi_sas_dq_show_slot(s, slot, s->private);
2988                 if (ret)
2989                         return ret;
2990         }
2991         return 0;
2992 }
2993
2994 static int hisi_sas_debugfs_dq_open(struct inode *inode, struct file *filp)
2995 {
2996         return single_open(filp, hisi_sas_debugfs_dq_show, inode->i_private);
2997 }
2998
2999 static const struct file_operations hisi_sas_debugfs_dq_fops = {
3000         .open = hisi_sas_debugfs_dq_open,
3001         .read = seq_read,
3002         .llseek = seq_lseek,
3003         .release = single_release,
3004         .owner = THIS_MODULE,
3005 };
3006
3007 static int hisi_sas_debugfs_iost_show(struct seq_file *s, void *p)
3008 {
3009         struct hisi_hba *hisi_hba = s->private;
3010         struct hisi_sas_iost *debugfs_iost = hisi_hba->debugfs_iost;
3011         int i, ret, max_command_entries = hisi_hba->hw->max_command_entries;
3012         __le64 *iost = &debugfs_iost->qw0;
3013
3014         for (i = 0; i < max_command_entries; i++, debugfs_iost++) {
3015                 ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_iost),
3016                                            iost);
3017                 if (ret)
3018                         return ret;
3019         }
3020
3021         return 0;
3022 }
3023
3024 static int hisi_sas_debugfs_iost_open(struct inode *inode, struct file *filp)
3025 {
3026         return single_open(filp, hisi_sas_debugfs_iost_show, inode->i_private);
3027 }
3028
3029 static const struct file_operations hisi_sas_debugfs_iost_fops = {
3030         .open = hisi_sas_debugfs_iost_open,
3031         .read = seq_read,
3032         .llseek = seq_lseek,
3033         .release = single_release,
3034         .owner = THIS_MODULE,
3035 };
3036
3037 static int hisi_sas_debugfs_itct_show(struct seq_file *s, void *p)
3038 {
3039         int i, ret;
3040         struct hisi_hba *hisi_hba = s->private;
3041         struct hisi_sas_itct *debugfs_itct = hisi_hba->debugfs_itct;
3042         __le64 *itct = &debugfs_itct->qw0;
3043
3044         for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, debugfs_itct++) {
3045                 ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_itct),
3046                                            itct);
3047                 if (ret)
3048                         return ret;
3049         }
3050
3051         return 0;
3052 }
3053
3054 static int hisi_sas_debugfs_itct_open(struct inode *inode, struct file *filp)
3055 {
3056         return single_open(filp, hisi_sas_debugfs_itct_show, inode->i_private);
3057 }
3058
3059 static const struct file_operations hisi_sas_debugfs_itct_fops = {
3060         .open = hisi_sas_debugfs_itct_open,
3061         .read = seq_read,
3062         .llseek = seq_lseek,
3063         .release = single_release,
3064         .owner = THIS_MODULE,
3065 };
3066
3067 static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
3068 {
3069         struct dentry *dump_dentry;
3070         struct dentry *dentry;
3071         char name[256];
3072         int p;
3073         int c;
3074         int d;
3075
3076         /* Create dump dir inside device dir */
3077         dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
3078         hisi_hba->debugfs_dump_dentry = dump_dentry;
3079
3080         debugfs_create_file("global", 0400, dump_dentry, hisi_hba,
3081                             &hisi_sas_debugfs_global_fops);
3082
3083         /* Create port dir and files */
3084         dentry = debugfs_create_dir("port", dump_dentry);
3085         for (p = 0; p < hisi_hba->n_phy; p++) {
3086                 snprintf(name, 256, "%d", p);
3087
3088                 debugfs_create_file(name, 0400, dentry, &hisi_hba->phy[p],
3089                                     &hisi_sas_debugfs_port_fops);
3090         }
3091
3092         /* Create CQ dir and files */
3093         dentry = debugfs_create_dir("cq", dump_dentry);
3094         for (c = 0; c < hisi_hba->queue_count; c++) {
3095                 snprintf(name, 256, "%d", c);
3096
3097                 debugfs_create_file(name, 0400, dentry, &hisi_hba->cq[c],
3098                                     &hisi_sas_debugfs_cq_fops);
3099         }
3100
3101         /* Create DQ dir and files */
3102         dentry = debugfs_create_dir("dq", dump_dentry);
3103         for (d = 0; d < hisi_hba->queue_count; d++) {
3104                 snprintf(name, 256, "%d", d);
3105
3106                 debugfs_create_file(name, 0400, dentry, &hisi_hba->dq[d],
3107                                     &hisi_sas_debugfs_dq_fops);
3108         }
3109
3110         debugfs_create_file("iost", 0400, dump_dentry, hisi_hba,
3111                             &hisi_sas_debugfs_iost_fops);
3112
3113         debugfs_create_file("itct", 0400, dump_dentry, hisi_hba,
3114                             &hisi_sas_debugfs_itct_fops);
3115
3116         return;
3117 }
3118
3119 static void hisi_sas_debugfs_snapshot_regs(struct hisi_hba *hisi_hba)
3120 {
3121         hisi_hba->hw->snapshot_prepare(hisi_hba);
3122
3123         hisi_sas_debugfs_snapshot_global_reg(hisi_hba);
3124         hisi_sas_debugfs_snapshot_port_reg(hisi_hba);
3125         hisi_sas_debugfs_snapshot_cq_reg(hisi_hba);
3126         hisi_sas_debugfs_snapshot_dq_reg(hisi_hba);
3127         hisi_sas_debugfs_snapshot_itct_reg(hisi_hba);
3128         hisi_sas_debugfs_snapshot_iost_reg(hisi_hba);
3129
3130         hisi_sas_debugfs_create_files(hisi_hba);
3131
3132         hisi_hba->hw->snapshot_restore(hisi_hba);
3133 }
3134
3135 static ssize_t hisi_sas_debugfs_trigger_dump_write(struct file *file,
3136                                                    const char __user *user_buf,
3137                                                    size_t count, loff_t *ppos)
3138 {
3139         struct hisi_hba *hisi_hba = file->f_inode->i_private;
3140         char buf[8];
3141
3142         /* A bit racy, but don't care too much since it's only debugfs */
3143         if (hisi_hba->debugfs_snapshot)
3144                 return -EFAULT;
3145
3146         if (count > 8)
3147                 return -EFAULT;
3148
3149         if (copy_from_user(buf, user_buf, count))
3150                 return -EFAULT;
3151
3152         if (buf[0] != '1')
3153                 return -EFAULT;
3154
3155         queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);
3156
3157         return count;
3158 }
3159
3160 static const struct file_operations hisi_sas_debugfs_trigger_dump_fops = {
3161         .write = &hisi_sas_debugfs_trigger_dump_write,
3162         .owner = THIS_MODULE,
3163 };
3164
3165 void hisi_sas_debugfs_work_handler(struct work_struct *work)
3166 {
3167         struct hisi_hba *hisi_hba =
3168                 container_of(work, struct hisi_hba, debugfs_work);
3169
3170         if (hisi_hba->debugfs_snapshot)
3171                 return;
3172         hisi_hba->debugfs_snapshot = true;
3173
3174         hisi_sas_debugfs_snapshot_regs(hisi_hba);
3175 }
3176 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_work_handler);
3177
3178 void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
3179 {
3180         int max_command_entries = hisi_hba->hw->max_command_entries;
3181         struct device *dev = hisi_hba->dev;
3182         int p, i, c, d;
3183         size_t sz;
3184
3185         hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
3186                                                    hisi_sas_debugfs_dir);
3187         debugfs_create_file("trigger_dump", 0600,
3188                             hisi_hba->debugfs_dir,
3189                             hisi_hba,
3190                             &hisi_sas_debugfs_trigger_dump_fops);
3191
3192         /* Alloc buffer for global */
3193         sz = hisi_hba->hw->debugfs_reg_global->count * 4;
3194         hisi_hba->debugfs_global_reg =
3195                 devm_kmalloc(dev, sz, GFP_KERNEL);
3196
3197         if (!hisi_hba->debugfs_global_reg)
3198                 goto fail_global;
3199
3200         /* Alloc buffer for port */
3201         sz = hisi_hba->hw->debugfs_reg_port->count * 4;
3202         for (p = 0; p < hisi_hba->n_phy; p++) {
3203                 hisi_hba->debugfs_port_reg[p] =
3204                         devm_kmalloc(dev, sz, GFP_KERNEL);
3205
3206                 if (!hisi_hba->debugfs_port_reg[p])
3207                         goto fail_port;
3208         }
3209
3210         /* Alloc buffer for cq */
3211         sz = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
3212         for (c = 0; c < hisi_hba->queue_count; c++) {
3213                 hisi_hba->debugfs_complete_hdr[c] =
3214                         devm_kmalloc(dev, sz, GFP_KERNEL);
3215
3216                 if (!hisi_hba->debugfs_complete_hdr[c])
3217                         goto fail_cq;
3218         }
3219
3220         /* Alloc buffer for dq */
3221         sz = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
3222         for (d = 0; d < hisi_hba->queue_count; d++) {
3223                 hisi_hba->debugfs_cmd_hdr[d] =
3224                         devm_kmalloc(dev, sz, GFP_KERNEL);
3225
3226                 if (!hisi_hba->debugfs_cmd_hdr[d])
3227                         goto fail_iost_dq;
3228         }
3229
3230         /* Alloc buffer for iost */
3231         sz = max_command_entries * sizeof(struct hisi_sas_iost);
3232
3233         hisi_hba->debugfs_iost = devm_kmalloc(dev, sz, GFP_KERNEL);
3234         if (!hisi_hba->debugfs_iost)
3235                 goto fail_iost_dq;
3236
3237         /* Alloc buffer for itct */
3238         /* New memory allocation must be locate before itct */
3239         sz = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
3240
3241         hisi_hba->debugfs_itct = devm_kmalloc(dev, sz, GFP_KERNEL);
3242         if (!hisi_hba->debugfs_itct)
3243                 goto fail_itct;
3244
3245         return;
3246 fail_itct:
3247         devm_kfree(dev, hisi_hba->debugfs_iost);
3248 fail_iost_dq:
3249         for (i = 0; i < d; i++)
3250                 devm_kfree(dev, hisi_hba->debugfs_cmd_hdr[i]);
3251 fail_cq:
3252         for (i = 0; i < c; i++)
3253                 devm_kfree(dev, hisi_hba->debugfs_complete_hdr[i]);
3254 fail_port:
3255         for (i = 0; i < p; i++)
3256                 devm_kfree(dev, hisi_hba->debugfs_port_reg[i]);
3257         devm_kfree(dev, hisi_hba->debugfs_global_reg);
3258 fail_global:
3259         debugfs_remove_recursive(hisi_hba->debugfs_dir);
3260         dev_dbg(dev, "failed to init debugfs!\n");
3261 }
3262 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_init);
3263
3264 void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba)
3265 {
3266         debugfs_remove_recursive(hisi_hba->debugfs_dir);
3267 }
3268 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_exit);
3269
3270 int hisi_sas_remove(struct platform_device *pdev)
3271 {
3272         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
3273         struct hisi_hba *hisi_hba = sha->lldd_ha;
3274         struct Scsi_Host *shost = sha->core.shost;
3275
3276         if (timer_pending(&hisi_hba->timer))
3277                 del_timer(&hisi_hba->timer);
3278
3279         sas_unregister_ha(sha);
3280         sas_remove_host(sha->core.shost);
3281
3282         hisi_sas_free(hisi_hba);
3283         scsi_host_put(shost);
3284         return 0;
3285 }
3286 EXPORT_SYMBOL_GPL(hisi_sas_remove);
3287
3288 bool hisi_sas_debugfs_enable;
3289 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
3290 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
3291 MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
3292
3293 static __init int hisi_sas_init(void)
3294 {
3295         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
3296         if (!hisi_sas_stt)
3297                 return -ENOMEM;
3298
3299         if (hisi_sas_debugfs_enable)
3300                 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
3301
3302         return 0;
3303 }
3304
3305 static __exit void hisi_sas_exit(void)
3306 {
3307         sas_release_transport(hisi_sas_stt);
3308
3309         debugfs_remove(hisi_sas_debugfs_dir);
3310 }
3311
3312 module_init(hisi_sas_init);
3313 module_exit(hisi_sas_exit);
3314
3315 MODULE_LICENSE("GPL");
3316 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
3317 MODULE_DESCRIPTION("HISILICON SAS controller driver");
3318 MODULE_ALIAS("platform:" DRV_NAME);