drivers/scsi/hisi_sas/hisi_sas_main.c

   1 /*
   2  * Copyright (c) 2015 Linaro Ltd.
   3  * Copyright (c) 2015 Hisilicon Limited.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  */
  11
  12 #include "hisi_sas.h"
  13 #define DRV_NAME "hisi_sas"
  14
  15 #define DEV_IS_GONE(dev) \
  16         ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  17
  18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
  19                                 u8 *lun, struct hisi_sas_tmf_task *tmf);
  20 static int
  21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
  22                              struct domain_device *device,
  23                              int abort_flag, int tag);
  24
  25 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
  26 {
  27         return device->port->ha->lldd_ha;
  28 }
  29
  30 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
  31 {
  32         void *bitmap = hisi_hba->slot_index_tags;
  33
  34         clear_bit(slot_idx, bitmap);
  35 }
  36
  37 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
  38 {
  39         hisi_sas_slot_index_clear(hisi_hba, slot_idx);
  40 }
  41
  42 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
  43 {
  44         void *bitmap = hisi_hba->slot_index_tags;
  45
  46         set_bit(slot_idx, bitmap);
  47 }
  48
  49 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
  50 {
  51         unsigned int index;
  52         void *bitmap = hisi_hba->slot_index_tags;
  53
  54         index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
  55         if (index >= hisi_hba->slot_index_count)
  56                 return -SAS_QUEUE_FULL;
  57         hisi_sas_slot_index_set(hisi_hba, index);
  58         *slot_idx = index;
  59         return 0;
  60 }
  61
  62 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
  63 {
  64         int i;
  65
  66         for (i = 0; i < hisi_hba->slot_index_count; ++i)
  67                 hisi_sas_slot_index_clear(hisi_hba, i);
  68 }
  69
  70 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
  71                              struct hisi_sas_slot *slot)
  72 {
  73         struct device *dev = &hisi_hba->pdev->dev;
  74
  75         if (!slot->task)
  76                 return;
  77
  78         if (!sas_protocol_ata(task->task_proto))
  79                 if (slot->n_elem)
  80                         dma_unmap_sg(dev, task->scatter, slot->n_elem,
  81                                      task->data_dir);
  82
  83         if (slot->command_table)
  84                 dma_pool_free(hisi_hba->command_table_pool,
  85                               slot->command_table, slot->command_table_dma);
  86
  87         if (slot->status_buffer)
  88                 dma_pool_free(hisi_hba->status_buffer_pool,
  89                               slot->status_buffer, slot->status_buffer_dma);
  90
  91         if (slot->sge_page)
  92                 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
  93                               slot->sge_page_dma);
  94
  95         list_del_init(&slot->entry);
  96         task->lldd_task = NULL;
  97         slot->task = NULL;
  98         slot->port = NULL;
  99         hisi_sas_slot_index_free(hisi_hba, slot->idx);
 100         /* slot memory is fully zeroed when it is reused */
 101 }
 102 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 103
 104 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 105                                   struct hisi_sas_slot *slot)
 106 {
 107         return hisi_hba->hw->prep_smp(hisi_hba, slot);
 108 }
 109
 110 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 111                                   struct hisi_sas_slot *slot, int is_tmf,
 112                                   struct hisi_sas_tmf_task *tmf)
 113 {
 114         return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
 115 }
 116
 117 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 118                                   struct hisi_sas_slot *slot)
 119 {
 120         return hisi_hba->hw->prep_stp(hisi_hba, slot);
 121 }
 122
 123 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 124                 struct hisi_sas_slot *slot,
 125                 int device_id, int abort_flag, int tag_to_abort)
 126 {
 127         return hisi_hba->hw->prep_abort(hisi_hba, slot,
 128                         device_id, abort_flag, tag_to_abort);
 129 }
 130
 131 /*
 132  * This function will issue an abort TMF regardless of whether the
 133  * task is in the sdev or not. Then it will do the task complete
 134  * cleanup and callbacks.
 135  */
 136 static void hisi_sas_slot_abort(struct work_struct *work)
 137 {
 138         struct hisi_sas_slot *abort_slot =
 139                 container_of(work, struct hisi_sas_slot, abort_slot);
 140         struct sas_task *task = abort_slot->task;
 141         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 142         struct scsi_cmnd *cmnd = task->uldd_task;
 143         struct hisi_sas_tmf_task tmf_task;
 144         struct domain_device *device = task->dev;
 145         struct hisi_sas_device *sas_dev = device->lldd_dev;
 146         struct scsi_lun lun;
 147         struct device *dev = &hisi_hba->pdev->dev;
 148         int tag = abort_slot->idx;
 149
 150         if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
 151                 dev_err(dev, "cannot abort slot for non-ssp task\n");
 152                 goto out;
 153         }
 154
 155         int_to_scsilun(cmnd->device->lun, &lun);
 156         tmf_task.tmf = TMF_ABORT_TASK;
 157         tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 158
 159         hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
 160 out:
 161         /* Do cleanup for this task */
 162         hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
 163         if (task->task_done)
 164                 task->task_done(task);
 165         if (sas_dev && sas_dev->running_req)
 166                 sas_dev->running_req--;
 167 }
 168
 169 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
 170                               int is_tmf, struct hisi_sas_tmf_task *tmf,
 171                               int *pass)
 172 {
 173         struct domain_device *device = task->dev;
 174         struct hisi_sas_device *sas_dev = device->lldd_dev;
 175         struct hisi_sas_port *port;
 176         struct hisi_sas_slot *slot;
 177         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 178         struct device *dev = &hisi_hba->pdev->dev;
 179         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
 180
 181         if (!device->port) {
 182                 struct task_status_struct *ts = &task->task_status;
 183
 184                 ts->resp = SAS_TASK_UNDELIVERED;
 185                 ts->stat = SAS_PHY_DOWN;
 186                 /*
 187                  * libsas will use dev->port, should
 188                  * not call task_done for sata
 189                  */
 190                 if (device->dev_type != SAS_SATA_DEV)
 191                         task->task_done(task);
 192                 return 0;
 193         }
 194
 195         if (DEV_IS_GONE(sas_dev)) {
 196                 if (sas_dev)
 197                         dev_info(dev, "task prep: device %llu not ready\n",
 198                                  sas_dev->device_id);
 199                 else
 200                         dev_info(dev, "task prep: device %016llx not ready\n",
 201                                  SAS_ADDR(device->sas_addr));
 202
 203                 rc = SAS_PHY_DOWN;
 204                 return rc;
 205         }
 206         port = device->port->lldd_port;
 207         if (port && !port->port_attached) {
 208                 dev_info(dev, "task prep: %s port%d not attach device\n",
 209                          (sas_protocol_ata(task->task_proto)) ?
 210                          "SATA/STP" : "SAS",
 211                          device->port->id);
 212
 213                 return SAS_PHY_DOWN;
 214         }
 215
 216         if (!sas_protocol_ata(task->task_proto)) {
 217                 if (task->num_scatter) {
 218                         n_elem = dma_map_sg(dev, task->scatter,
 219                                             task->num_scatter, task->data_dir);
 220                         if (!n_elem) {
 221                                 rc = -ENOMEM;
 222                                 goto prep_out;
 223                         }
 224                 }
 225         } else
 226                 n_elem = task->num_scatter;
 227
 228         if (hisi_hba->hw->slot_index_alloc)
 229                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
 230                                                     device);
 231         else
 232                 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
 233         if (rc)
 234                 goto err_out;
 235         rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
 236                                          &dlvry_queue_slot);
 237         if (rc)
 238                 goto err_out_tag;
 239
 240         slot = &hisi_hba->slot_info[slot_idx];
 241         memset(slot, 0, sizeof(struct hisi_sas_slot));
 242
 243         slot->idx = slot_idx;
 244         slot->n_elem = n_elem;
 245         slot->dlvry_queue = dlvry_queue;
 246         slot->dlvry_queue_slot = dlvry_queue_slot;
 247         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 248         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 249         slot->task = task;
 250         slot->port = port;
 251         task->lldd_task = slot;
 252         INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
 253
 254         slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
 255                                              GFP_ATOMIC,
 256                                              &slot->status_buffer_dma);
 257         if (!slot->status_buffer) {
 258                 rc = -ENOMEM;
 259                 goto err_out_slot_buf;
 260         }
 261         memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
 262
 263         slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
 264                                              GFP_ATOMIC,
 265                                              &slot->command_table_dma);
 266         if (!slot->command_table) {
 267                 rc = -ENOMEM;
 268                 goto err_out_status_buf;
 269         }
 270         memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
 271         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 272
 273         switch (task->task_proto) {
 274         case SAS_PROTOCOL_SMP:
 275                 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
 276                 break;
 277         case SAS_PROTOCOL_SSP:
 278                 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
 279                 break;
 280         case SAS_PROTOCOL_SATA:
 281         case SAS_PROTOCOL_STP:
 282         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 283                 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
 284                 break;
 285         default:
 286                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 287                         task->task_proto);
 288                 rc = -EINVAL;
 289                 break;
 290         }
 291
 292         if (rc) {
 293                 dev_err(dev, "task prep: rc = 0x%x\n", rc);
 294                 if (slot->sge_page)
 295                         goto err_out_sge;
 296                 goto err_out_command_table;
 297         }
 298
 299         list_add_tail(&slot->entry, &port->list);
 300         spin_lock(&task->task_state_lock);
 301         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 302         spin_unlock(&task->task_state_lock);
 303
 304         hisi_hba->slot_prep = slot;
 305
 306         sas_dev->running_req++;
 307         ++(*pass);
 308
 309         return 0;
 310
 311 err_out_sge:
 312         dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
 313                 slot->sge_page_dma);
 314 err_out_command_table:
 315         dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
 316                 slot->command_table_dma);
 317 err_out_status_buf:
 318         dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
 319                 slot->status_buffer_dma);
 320 err_out_slot_buf:
 321         /* Nothing to be done */
 322 err_out_tag:
 323         hisi_sas_slot_index_free(hisi_hba, slot_idx);
 324 err_out:
 325         dev_err(dev, "task prep: failed[%d]!\n", rc);
 326         if (!sas_protocol_ata(task->task_proto))
 327                 if (n_elem)
 328                         dma_unmap_sg(dev, task->scatter, n_elem,
 329                                      task->data_dir);
 330 prep_out:
 331         return rc;
 332 }
 333
 334 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 335                               int is_tmf, struct hisi_sas_tmf_task *tmf)
 336 {
 337         u32 rc;
 338         u32 pass = 0;
 339         unsigned long flags;
 340         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 341         struct device *dev = &hisi_hba->pdev->dev;
 342
 343         /* protect task_prep and start_delivery sequence */
 344         spin_lock_irqsave(&hisi_hba->lock, flags);
 345         rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
 346         if (rc)
 347                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 348
 349         if (likely(pass))
 350                 hisi_hba->hw->start_delivery(hisi_hba);
 351         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 352
 353         return rc;
 354 }
 355
 356 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 357 {
 358         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 359         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 360         struct sas_ha_struct *sas_ha;
 361
 362         if (!phy->phy_attached)
 363                 return;
 364
 365         sas_ha = &hisi_hba->sha;
 366         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 367
 368         if (sas_phy->phy) {
 369                 struct sas_phy *sphy = sas_phy->phy;
 370
 371                 sphy->negotiated_linkrate = sas_phy->linkrate;
 372                 sphy->minimum_linkrate = phy->minimum_linkrate;
 373                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 374                 sphy->maximum_linkrate = phy->maximum_linkrate;
 375         }
 376
 377         if (phy->phy_type & PORT_TYPE_SAS) {
 378                 struct sas_identify_frame *id;
 379
 380                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 381                 id->dev_type = phy->identify.device_type;
 382                 id->initiator_bits = SAS_PROTOCOL_ALL;
 383                 id->target_bits = phy->identify.target_port_protocols;
 384         } else if (phy->phy_type & PORT_TYPE_SATA) {
 385                 /*Nothing*/
 386         }
 387
 388         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 389         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 390 }
 391
 392 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 393 {
 394         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 395         struct hisi_sas_device *sas_dev = NULL;
 396         int i;
 397
 398         spin_lock(&hisi_hba->lock);
 399         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
 400                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 401                         hisi_hba->devices[i].device_id = i;
 402                         sas_dev = &hisi_hba->devices[i];
 403                         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 404                         sas_dev->dev_type = device->dev_type;
 405                         sas_dev->hisi_hba = hisi_hba;
 406                         sas_dev->sas_device = device;
 407                         break;
 408                 }
 409         }
 410         spin_unlock(&hisi_hba->lock);
 411
 412         return sas_dev;
 413 }
 414
 415 static int hisi_sas_dev_found(struct domain_device *device)
 416 {
 417         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 418         struct domain_device *parent_dev = device->parent;
 419         struct hisi_sas_device *sas_dev;
 420         struct device *dev = &hisi_hba->pdev->dev;
 421
 422         if (hisi_hba->hw->alloc_dev)
 423                 sas_dev = hisi_hba->hw->alloc_dev(device);
 424         else
 425                 sas_dev = hisi_sas_alloc_dev(device);
 426         if (!sas_dev) {
 427                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 428                         HISI_SAS_MAX_DEVICES);
 429                 return -EINVAL;
 430         }
 431
 432         device->lldd_dev = sas_dev;
 433         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 434
 435         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 436                 int phy_no;
 437                 u8 phy_num = parent_dev->ex_dev.num_phys;
 438                 struct ex_phy *phy;
 439
 440                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 441                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 442                         if (SAS_ADDR(phy->attached_sas_addr) ==
 443                                 SAS_ADDR(device->sas_addr)) {
 444                                 sas_dev->attached_phy = phy_no;
 445                                 break;
 446                         }
 447                 }
 448
 449                 if (phy_no == phy_num) {
 450                         dev_info(dev, "dev found: no attached "
 451                                  "dev:%016llx at ex:%016llx\n",
 452                                  SAS_ADDR(device->sas_addr),
 453                                  SAS_ADDR(parent_dev->sas_addr));
 454                         return -EINVAL;
 455                 }
 456         }
 457
 458         return 0;
 459 }
 460
 461 static int hisi_sas_slave_configure(struct scsi_device *sdev)
 462 {
 463         struct domain_device *dev = sdev_to_domain_dev(sdev);
 464         int ret = sas_slave_configure(sdev);
 465
 466         if (ret)
 467                 return ret;
 468         if (!dev_is_sata(dev))
 469                 sas_change_queue_depth(sdev, 64);
 470
 471         return 0;
 472 }
 473
 474 static void hisi_sas_scan_start(struct Scsi_Host *shost)
 475 {
 476         struct hisi_hba *hisi_hba = shost_priv(shost);
 477         int i;
 478
 479         for (i = 0; i < hisi_hba->n_phy; ++i)
 480                 hisi_sas_bytes_dmaed(hisi_hba, i);
 481
 482         hisi_hba->scan_finished = 1;
 483 }
 484
 485 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 486 {
 487         struct hisi_hba *hisi_hba = shost_priv(shost);
 488         struct sas_ha_struct *sha = &hisi_hba->sha;
 489
 490         if (hisi_hba->scan_finished == 0)
 491                 return 0;
 492
 493         sas_drain_work(sha);
 494         return 1;
 495 }
 496
 497 static void hisi_sas_phyup_work(struct work_struct *work)
 498 {
 499         struct hisi_sas_phy *phy =
 500                 container_of(work, struct hisi_sas_phy, phyup_ws);
 501         struct hisi_hba *hisi_hba = phy->hisi_hba;
 502         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 503         int phy_no = sas_phy->id;
 504
 505         hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
 506         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 507 }
 508
 509 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 510 {
 511         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 512         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 513
 514         phy->hisi_hba = hisi_hba;
 515         phy->port = NULL;
 516         init_timer(&phy->timer);
 517         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 518         sas_phy->class = SAS;
 519         sas_phy->iproto = SAS_PROTOCOL_ALL;
 520         sas_phy->tproto = 0;
 521         sas_phy->type = PHY_TYPE_PHYSICAL;
 522         sas_phy->role = PHY_ROLE_INITIATOR;
 523         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 524         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 525         sas_phy->id = phy_no;
 526         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 527         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 528         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 529         sas_phy->lldd_phy = phy;
 530
 531         INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
 532 }
 533
 534 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 535 {
 536         struct sas_ha_struct *sas_ha = sas_phy->ha;
 537         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 538         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 539         struct asd_sas_port *sas_port = sas_phy->port;
 540         struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
 541         unsigned long flags;
 542
 543         if (!sas_port)
 544                 return;
 545
 546         spin_lock_irqsave(&hisi_hba->lock, flags);
 547         port->port_attached = 1;
 548         port->id = phy->port_id;
 549         phy->port = port;
 550         sas_port->lldd_port = port;
 551         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 552 }
 553
 554 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
 555                                      struct domain_device *device)
 556 {
 557         struct hisi_sas_phy *phy;
 558         struct hisi_sas_port *port;
 559         struct hisi_sas_slot *slot, *slot2;
 560         struct device *dev = &hisi_hba->pdev->dev;
 561
 562         phy = &hisi_hba->phy[phy_no];
 563         port = phy->port;
 564         if (!port)
 565                 return;
 566
 567         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
 568                 struct sas_task *task;
 569
 570                 task = slot->task;
 571                 if (device && task->dev != device)
 572                         continue;
 573
 574                 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
 575                          slot->dlvry_queue, slot->dlvry_queue_slot, task);
 576                 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
 577         }
 578 }
 579
 580 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
 581 {
 582         struct domain_device *device;
 583         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 584         struct asd_sas_port *sas_port = sas_phy->port;
 585
 586         list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
 587                 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
 588 }
 589
 590 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
 591                         struct domain_device *device)
 592 {
 593         struct asd_sas_port *port = device->port;
 594         struct asd_sas_phy *sas_phy;
 595
 596         list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
 597                 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
 598 }
 599
 600 static void hisi_sas_dev_gone(struct domain_device *device)
 601 {
 602         struct hisi_sas_device *sas_dev = device->lldd_dev;
 603         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 604         struct device *dev = &hisi_hba->pdev->dev;
 605         u64 dev_id = sas_dev->device_id;
 606
 607         dev_info(dev, "found dev[%lld:%x] is gone\n",
 608                  sas_dev->device_id, sas_dev->dev_type);
 609
 610         hisi_sas_internal_task_abort(hisi_hba, device,
 611                                      HISI_SAS_INT_ABT_DEV, 0);
 612
 613         hisi_hba->hw->free_device(hisi_hba, sas_dev);
 614         device->lldd_dev = NULL;
 615         memset(sas_dev, 0, sizeof(*sas_dev));
 616         sas_dev->device_id = dev_id;
 617         sas_dev->dev_type = SAS_PHY_UNUSED;
 618         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 619 }
 620
 621 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 622 {
 623         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
 624 }
 625
 626 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
 627                                 void *funcdata)
 628 {
 629         struct sas_ha_struct *sas_ha = sas_phy->ha;
 630         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 631         int phy_no = sas_phy->id;
 632
 633         switch (func) {
 634         case PHY_FUNC_HARD_RESET:
 635                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 636                 break;
 637
 638         case PHY_FUNC_LINK_RESET:
 639                 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
 640                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 641                 break;
 642
 643         case PHY_FUNC_DISABLE:
 644                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 645                 break;
 646
 647         case PHY_FUNC_SET_LINK_RATE:
 648         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 649         default:
 650                 return -EOPNOTSUPP;
 651         }
 652         return 0;
 653 }
 654
 655 static void hisi_sas_task_done(struct sas_task *task)
 656 {
 657         if (!del_timer(&task->slow_task->timer))
 658                 return;
 659         complete(&task->slow_task->completion);
 660 }
 661
 662 static void hisi_sas_tmf_timedout(unsigned long data)
 663 {
 664         struct sas_task *task = (struct sas_task *)data;
 665
 666         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 667         complete(&task->slow_task->completion);
 668 }
 669
 670 #define TASK_TIMEOUT 20
 671 #define TASK_RETRY 3
 672 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
 673                                            void *parameter, u32 para_len,
 674                                            struct hisi_sas_tmf_task *tmf)
 675 {
 676         struct hisi_sas_device *sas_dev = device->lldd_dev;
 677         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 678         struct device *dev = &hisi_hba->pdev->dev;
 679         struct sas_task *task;
 680         int res, retry;
 681
 682         for (retry = 0; retry < TASK_RETRY; retry++) {
 683                 task = sas_alloc_slow_task(GFP_KERNEL);
 684                 if (!task)
 685                         return -ENOMEM;
 686
 687                 task->dev = device;
 688                 task->task_proto = device->tproto;
 689
 690                 memcpy(&task->ssp_task, parameter, para_len);
 691                 task->task_done = hisi_sas_task_done;
 692
 693                 task->slow_task->timer.data = (unsigned long) task;
 694                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
 695                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
 696                 add_timer(&task->slow_task->timer);
 697
 698                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
 699
 700                 if (res) {
 701                         del_timer(&task->slow_task->timer);
 702                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
 703                                 res);
 704                         goto ex_err;
 705                 }
 706
 707                 wait_for_completion(&task->slow_task->completion);
 708                 res = TMF_RESP_FUNC_FAILED;
 709                 /* Even TMF timed out, return direct. */
 710                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 711                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 712                                 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
 713                                         tmf->tag_of_task_to_be_managed);
 714                                 if (task->lldd_task) {
 715                                         struct hisi_sas_slot *slot =
 716                                                 task->lldd_task;
 717
 718                                         hisi_sas_slot_task_free(hisi_hba,
 719                                                                 task, slot);
 720                                 }
 721
 722                                 goto ex_err;
 723                         }
 724                 }
 725
 726                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 727                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
 728                         res = TMF_RESP_FUNC_COMPLETE;
 729                         break;
 730                 }
 731
 732                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 733                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
 734                         res = TMF_RESP_FUNC_SUCC;
 735                         break;
 736                 }
 737
 738                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 739                       task->task_status.stat == SAS_DATA_UNDERRUN) {
 740                         /* no error, but return the number of bytes of
 741                          * underrun
 742                          */
 743                         dev_warn(dev, "abort tmf: task to dev %016llx "
 744                                  "resp: 0x%x sts 0x%x underrun\n",
 745                                  SAS_ADDR(device->sas_addr),
 746                                  task->task_status.resp,
 747                                  task->task_status.stat);
 748                         res = task->task_status.residual;
 749                         break;
 750                 }
 751
 752                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 753                         task->task_status.stat == SAS_DATA_OVERRUN) {
 754                         dev_warn(dev, "abort tmf: blocked task error\n");
 755                         res = -EMSGSIZE;
 756                         break;
 757                 }
 758
 759                 dev_warn(dev, "abort tmf: task to dev "
 760                          "%016llx resp: 0x%x status 0x%x\n",
 761                          SAS_ADDR(device->sas_addr), task->task_status.resp,
 762                          task->task_status.stat);
 763                 sas_free_task(task);
 764                 task = NULL;
 765         }
 766 ex_err:
 767         WARN_ON(retry == TASK_RETRY);
 768         sas_free_task(task);
 769         return res;
 770 }
 771
 772 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
 773                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
 774 {
 775         struct sas_ssp_task ssp_task;
 776
 777         if (!(device->tproto & SAS_PROTOCOL_SSP))
 778                 return TMF_RESP_FUNC_ESUPP;
 779
 780         memcpy(ssp_task.LUN, lun, 8);
 781
 782         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
 783                                 sizeof(ssp_task), tmf);
 784 }
 785
 786 static int hisi_sas_abort_task(struct sas_task *task)
 787 {
 788         struct scsi_lun lun;
 789         struct hisi_sas_tmf_task tmf_task;
 790         struct domain_device *device = task->dev;
 791         struct hisi_sas_device *sas_dev = device->lldd_dev;
 792         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 793         struct device *dev = &hisi_hba->pdev->dev;
 794         int rc = TMF_RESP_FUNC_FAILED;
 795         unsigned long flags;
 796
 797         if (!sas_dev) {
 798                 dev_warn(dev, "Device has been removed\n");
 799                 return TMF_RESP_FUNC_FAILED;
 800         }
 801
 802         spin_lock_irqsave(&task->task_state_lock, flags);
 803         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
 804                 spin_unlock_irqrestore(&task->task_state_lock, flags);
 805                 rc = TMF_RESP_FUNC_COMPLETE;
 806                 goto out;
 807         }
 808
 809         spin_unlock_irqrestore(&task->task_state_lock, flags);
 810         sas_dev->dev_status = HISI_SAS_DEV_EH;
 811         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 812                 struct scsi_cmnd *cmnd = task->uldd_task;
 813                 struct hisi_sas_slot *slot = task->lldd_task;
 814                 u32 tag = slot->idx;
 815
 816                 int_to_scsilun(cmnd->device->lun, &lun);
 817                 tmf_task.tmf = TMF_ABORT_TASK;
 818                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 819
 820                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
 821                                                   &tmf_task);
 822
 823                 /* if successful, clear the task and callback forwards.*/
 824                 if (rc == TMF_RESP_FUNC_COMPLETE) {
 825                         if (task->lldd_task) {
 826                                 struct hisi_sas_slot *slot;
 827
 828                                 slot = &hisi_hba->slot_info
 829                                         [tmf_task.tag_of_task_to_be_managed];
 830                                 spin_lock_irqsave(&hisi_hba->lock, flags);
 831                                 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
 832                                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 833                         }
 834                 }
 835
 836                 hisi_sas_internal_task_abort(hisi_hba, device,
 837                                              HISI_SAS_INT_ABT_CMD, tag);
 838         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
 839                 task->task_proto & SAS_PROTOCOL_STP) {
 840                 if (task->dev->dev_type == SAS_SATA_DEV) {
 841                         hisi_sas_internal_task_abort(hisi_hba, device,
 842                                                      HISI_SAS_INT_ABT_DEV, 0);
 843                         rc = TMF_RESP_FUNC_COMPLETE;
 844                 }
 845         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 846                 /* SMP */
 847                 struct hisi_sas_slot *slot = task->lldd_task;
 848                 u32 tag = slot->idx;
 849
 850                 hisi_sas_internal_task_abort(hisi_hba, device,
 851                                              HISI_SAS_INT_ABT_CMD, tag);
 852         }
 853
 854 out:
 855         if (rc != TMF_RESP_FUNC_COMPLETE)
 856                 dev_notice(dev, "abort task: rc=%d\n", rc);
 857         return rc;
 858 }
 859
 860 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
 861 {
 862         struct hisi_sas_tmf_task tmf_task;
 863         int rc = TMF_RESP_FUNC_FAILED;
 864
 865         tmf_task.tmf = TMF_ABORT_TASK_SET;
 866         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 867
 868         return rc;
 869 }
 870
 871 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
 872 {
 873         int rc = TMF_RESP_FUNC_FAILED;
 874         struct hisi_sas_tmf_task tmf_task;
 875
 876         tmf_task.tmf = TMF_CLEAR_ACA;
 877         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 878
 879         return rc;
 880 }
 881
 882 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
 883 {
 884         struct sas_phy *phy = sas_get_local_phy(device);
 885         int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
 886                         (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
 887         rc = sas_phy_reset(phy, reset_type);
 888         sas_put_local_phy(phy);
 889         msleep(2000);
 890         return rc;
 891 }
 892
 893 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
 894 {
 895         struct hisi_sas_device *sas_dev = device->lldd_dev;
 896         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 897         unsigned long flags;
 898         int rc = TMF_RESP_FUNC_FAILED;
 899
 900         if (sas_dev->dev_status != HISI_SAS_DEV_EH)
 901                 return TMF_RESP_FUNC_FAILED;
 902         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 903
 904         rc = hisi_sas_debug_I_T_nexus_reset(device);
 905
 906         spin_lock_irqsave(&hisi_hba->lock, flags);
 907         hisi_sas_release_task(hisi_hba, device);
 908         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 909
 910         return 0;
 911 }
 912
 913 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
 914 {
 915         struct hisi_sas_tmf_task tmf_task;
 916         struct hisi_sas_device *sas_dev = device->lldd_dev;
 917         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 918         struct device *dev = &hisi_hba->pdev->dev;
 919         unsigned long flags;
 920         int rc = TMF_RESP_FUNC_FAILED;
 921
 922         tmf_task.tmf = TMF_LU_RESET;
 923         sas_dev->dev_status = HISI_SAS_DEV_EH;
 924         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 925         if (rc == TMF_RESP_FUNC_COMPLETE) {
 926                 spin_lock_irqsave(&hisi_hba->lock, flags);
 927                 hisi_sas_release_task(hisi_hba, device);
 928                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 929         }
 930
 931         /* If failed, fall-through I_T_Nexus reset */
 932         dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
 933                 sas_dev->device_id, rc);
 934         return rc;
 935 }
 936
 937 static int hisi_sas_query_task(struct sas_task *task)
 938 {
 939         struct scsi_lun lun;
 940         struct hisi_sas_tmf_task tmf_task;
 941         int rc = TMF_RESP_FUNC_FAILED;
 942
 943         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 944                 struct scsi_cmnd *cmnd = task->uldd_task;
 945                 struct domain_device *device = task->dev;
 946                 struct hisi_sas_slot *slot = task->lldd_task;
 947                 u32 tag = slot->idx;
 948
 949                 int_to_scsilun(cmnd->device->lun, &lun);
 950                 tmf_task.tmf = TMF_QUERY_TASK;
 951                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 952
 953                 rc = hisi_sas_debug_issue_ssp_tmf(device,
 954                                                   lun.scsi_lun,
 955                                                   &tmf_task);
 956                 switch (rc) {
 957                 /* The task is still in Lun, release it then */
 958                 case TMF_RESP_FUNC_SUCC:
 959                 /* The task is not in Lun or failed, reset the phy */
 960                 case TMF_RESP_FUNC_FAILED:
 961                 case TMF_RESP_FUNC_COMPLETE:
 962                         break;
 963                 }
 964         }
 965         return rc;
 966 }
 967
 968 static int
 969 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id,
 970                                   struct sas_task *task, int abort_flag,
 971                                   int task_tag)
 972 {
 973         struct domain_device *device = task->dev;
 974         struct hisi_sas_device *sas_dev = device->lldd_dev;
 975         struct device *dev = &hisi_hba->pdev->dev;
 976         struct hisi_sas_port *port;
 977         struct hisi_sas_slot *slot;
 978         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 979         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
 980
 981         if (!device->port)
 982                 return -1;
 983
 984         port = device->port->lldd_port;
 985
 986         /* simply get a slot and send abort command */
 987         rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
 988         if (rc)
 989                 goto err_out;
 990         rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
 991                                          &dlvry_queue_slot);
 992         if (rc)
 993                 goto err_out_tag;
 994
 995         slot = &hisi_hba->slot_info[slot_idx];
 996         memset(slot, 0, sizeof(struct hisi_sas_slot));
 997
 998         slot->idx = slot_idx;
 999         slot->n_elem = n_elem;
1000         slot->dlvry_queue = dlvry_queue;
1001         slot->dlvry_queue_slot = dlvry_queue_slot;
1002         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1003         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1004         slot->task = task;
1005         slot->port = port;
1006         task->lldd_task = slot;
1007
1008         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1009
1010         rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1011                                       abort_flag, task_tag);
1012         if (rc)
1013                 goto err_out_tag;
1014
1015         /* Port structure is static for the HBA, so
1016         *  even if the port is deformed it is ok
1017         *  to reference.
1018         */
1019         list_add_tail(&slot->entry, &port->list);
1020         spin_lock(&task->task_state_lock);
1021         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1022         spin_unlock(&task->task_state_lock);
1023
1024         hisi_hba->slot_prep = slot;
1025
1026         sas_dev->running_req++;
1027         /* send abort command to our chip */
1028         hisi_hba->hw->start_delivery(hisi_hba);
1029
1030         return 0;
1031
1032 err_out_tag:
1033         hisi_sas_slot_index_free(hisi_hba, slot_idx);
1034 err_out:
1035         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1036
1037         return rc;
1038 }
1039
1040 /**
1041  * hisi_sas_internal_task_abort -- execute an internal
1042  * abort command for single IO command or a device
1043  * @hisi_hba: host controller struct
1044  * @device: domain device
1045  * @abort_flag: mode of operation, device or single IO
1046  * @tag: tag of IO to be aborted (only relevant to single
1047  *       IO mode)
1048  */
1049 static int
1050 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1051                              struct domain_device *device,
1052                              int abort_flag, int tag)
1053 {
1054         struct sas_task *task;
1055         struct hisi_sas_device *sas_dev = device->lldd_dev;
1056         struct device *dev = &hisi_hba->pdev->dev;
1057         int res;
1058         unsigned long flags;
1059
1060         if (!hisi_hba->hw->prep_abort)
1061                 return -EOPNOTSUPP;
1062
1063         task = sas_alloc_slow_task(GFP_KERNEL);
1064         if (!task)
1065                 return -ENOMEM;
1066
1067         task->dev = device;
1068         task->task_proto = device->tproto;
1069         task->task_done = hisi_sas_task_done;
1070         task->slow_task->timer.data = (unsigned long)task;
1071         task->slow_task->timer.function = hisi_sas_tmf_timedout;
1072         task->slow_task->timer.expires = jiffies + 20*HZ;
1073         add_timer(&task->slow_task->timer);
1074
1075         /* Lock as we are alloc'ing a slot, which cannot be interrupted */
1076         spin_lock_irqsave(&hisi_hba->lock, flags);
1077         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1078                                                 task, abort_flag, tag);
1079         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1080         if (res) {
1081                 del_timer(&task->slow_task->timer);
1082                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1083                         res);
1084                 goto exit;
1085         }
1086         wait_for_completion(&task->slow_task->completion);
1087         res = TMF_RESP_FUNC_FAILED;
1088
1089         if (task->task_status.resp == SAS_TASK_COMPLETE &&
1090                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1091                 res = TMF_RESP_FUNC_COMPLETE;
1092                 goto exit;
1093         }
1094
1095         /* TMF timed out, return direct. */
1096         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1097                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1098                         dev_err(dev, "internal task abort: timeout.\n");
1099                         if (task->lldd_task) {
1100                                 struct hisi_sas_slot *slot = task->lldd_task;
1101
1102                                 hisi_sas_slot_task_free(hisi_hba, task, slot);
1103                         }
1104                 }
1105         }
1106
1107 exit:
1108         dev_info(dev, "internal task abort: task to dev %016llx task=%p "
1109                 "resp: 0x%x sts 0x%x\n",
1110                 SAS_ADDR(device->sas_addr),
1111                 task,
1112                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1113                 task->task_status.stat);
1114         sas_free_task(task);
1115
1116         return res;
1117 }
1118
1119 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1120 {
1121         hisi_sas_port_notify_formed(sas_phy);
1122 }
1123
1124 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1125 {
1126         hisi_sas_port_notify_deformed(sas_phy);
1127 }
1128
1129 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1130 {
1131         phy->phy_attached = 0;
1132         phy->phy_type = 0;
1133         phy->port = NULL;
1134 }
1135
1136 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1137 {
1138         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1139         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1140         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1141
1142         if (rdy) {
1143                 /* Phy down but ready */
1144                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1145                 hisi_sas_port_notify_formed(sas_phy);
1146         } else {
1147                 struct hisi_sas_port *port  = phy->port;
1148
1149                 /* Phy down and not ready */
1150                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1151                 sas_phy_disconnected(sas_phy);
1152
1153                 if (port) {
1154                         if (phy->phy_type & PORT_TYPE_SAS) {
1155                                 int port_id = port->id;
1156
1157                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1158                                                                        port_id))
1159                                         port->port_attached = 0;
1160                         } else if (phy->phy_type & PORT_TYPE_SATA)
1161                                 port->port_attached = 0;
1162                 }
1163                 hisi_sas_phy_disconnected(phy);
1164         }
1165 }
1166 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1167
1168 static struct scsi_transport_template *hisi_sas_stt;
1169
1170 static struct scsi_host_template hisi_sas_sht = {
1171         .module                 = THIS_MODULE,
1172         .name                   = DRV_NAME,
1173         .queuecommand           = sas_queuecommand,
1174         .target_alloc           = sas_target_alloc,
1175         .slave_configure        = hisi_sas_slave_configure,
1176         .scan_finished          = hisi_sas_scan_finished,
1177         .scan_start             = hisi_sas_scan_start,
1178         .change_queue_depth     = sas_change_queue_depth,
1179         .bios_param             = sas_bios_param,
1180         .can_queue              = 1,
1181         .this_id                = -1,
1182         .sg_tablesize           = SG_ALL,
1183         .max_sectors            = SCSI_DEFAULT_MAX_SECTORS,
1184         .use_clustering         = ENABLE_CLUSTERING,
1185         .eh_device_reset_handler = sas_eh_device_reset_handler,
1186         .eh_bus_reset_handler   = sas_eh_bus_reset_handler,
1187         .target_destroy         = sas_target_destroy,
1188         .ioctl                  = sas_ioctl,
1189 };
1190
1191 static struct sas_domain_function_template hisi_sas_transport_ops = {
1192         .lldd_dev_found         = hisi_sas_dev_found,
1193         .lldd_dev_gone          = hisi_sas_dev_gone,
1194         .lldd_execute_task      = hisi_sas_queue_command,
1195         .lldd_control_phy       = hisi_sas_control_phy,
1196         .lldd_abort_task        = hisi_sas_abort_task,
1197         .lldd_abort_task_set    = hisi_sas_abort_task_set,
1198         .lldd_clear_aca         = hisi_sas_clear_aca,
1199         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
1200         .lldd_lu_reset          = hisi_sas_lu_reset,
1201         .lldd_query_task        = hisi_sas_query_task,
1202         .lldd_port_formed       = hisi_sas_port_formed,
1203         .lldd_port_deformed     = hisi_sas_port_deformed,
1204 };
1205
1206 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1207 {
1208         struct platform_device *pdev = hisi_hba->pdev;
1209         struct device *dev = &pdev->dev;
1210         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1211
1212         spin_lock_init(&hisi_hba->lock);
1213         for (i = 0; i < hisi_hba->n_phy; i++) {
1214                 hisi_sas_phy_init(hisi_hba, i);
1215                 hisi_hba->port[i].port_attached = 0;
1216                 hisi_hba->port[i].id = -1;
1217                 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1218         }
1219
1220         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1221                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1222                 hisi_hba->devices[i].device_id = i;
1223                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1224         }
1225
1226         for (i = 0; i < hisi_hba->queue_count; i++) {
1227                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1228                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1229
1230                 /* Completion queue structure */
1231                 cq->id = i;
1232                 cq->hisi_hba = hisi_hba;
1233
1234                 /* Delivery queue structure */
1235                 dq->id = i;
1236                 dq->hisi_hba = hisi_hba;
1237
1238                 /* Delivery queue */
1239                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1240                 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1241                                         &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1242                 if (!hisi_hba->cmd_hdr[i])
1243                         goto err_out;
1244                 memset(hisi_hba->cmd_hdr[i], 0, s);
1245
1246                 /* Completion queue */
1247                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1248                 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1249                                 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1250                 if (!hisi_hba->complete_hdr[i])
1251                         goto err_out;
1252                 memset(hisi_hba->complete_hdr[i], 0, s);
1253         }
1254
1255         s = HISI_SAS_STATUS_BUF_SZ;
1256         hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1257                                                        dev, s, 16, 0);
1258         if (!hisi_hba->status_buffer_pool)
1259                 goto err_out;
1260
1261         s = HISI_SAS_COMMAND_TABLE_SZ;
1262         hisi_hba->command_table_pool = dma_pool_create("command_table",
1263                                                        dev, s, 16, 0);
1264         if (!hisi_hba->command_table_pool)
1265                 goto err_out;
1266
1267         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1268         hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1269                                             GFP_KERNEL);
1270         if (!hisi_hba->itct)
1271                 goto err_out;
1272
1273         memset(hisi_hba->itct, 0, s);
1274
1275         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1276                                            sizeof(struct hisi_sas_slot),
1277                                            GFP_KERNEL);
1278         if (!hisi_hba->slot_info)
1279                 goto err_out;
1280
1281         s = max_command_entries * sizeof(struct hisi_sas_iost);
1282         hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1283                                             GFP_KERNEL);
1284         if (!hisi_hba->iost)
1285                 goto err_out;
1286
1287         memset(hisi_hba->iost, 0, s);
1288
1289         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1290         hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1291                                 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1292         if (!hisi_hba->breakpoint)
1293                 goto err_out;
1294
1295         memset(hisi_hba->breakpoint, 0, s);
1296
1297         hisi_hba->slot_index_count = max_command_entries;
1298         s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1299         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1300         if (!hisi_hba->slot_index_tags)
1301                 goto err_out;
1302
1303         hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1304                                 sizeof(struct hisi_sas_sge_page), 16, 0);
1305         if (!hisi_hba->sge_page_pool)
1306                 goto err_out;
1307
1308         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1309         hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1310                                 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1311         if (!hisi_hba->initial_fis)
1312                 goto err_out;
1313         memset(hisi_hba->initial_fis, 0, s);
1314
1315         s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1316         hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1317                                 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1318         if (!hisi_hba->sata_breakpoint)
1319                 goto err_out;
1320         memset(hisi_hba->sata_breakpoint, 0, s);
1321
1322         hisi_sas_slot_index_init(hisi_hba);
1323
1324         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1325         if (!hisi_hba->wq) {
1326                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1327                 goto err_out;
1328         }
1329
1330         return 0;
1331 err_out:
1332         return -ENOMEM;
1333 }
1334
1335 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1336 {
1337         struct device *dev = &hisi_hba->pdev->dev;
1338         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1339
1340         for (i = 0; i < hisi_hba->queue_count; i++) {
1341                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1342                 if (hisi_hba->cmd_hdr[i])
1343                         dma_free_coherent(dev, s,
1344                                           hisi_hba->cmd_hdr[i],
1345                                           hisi_hba->cmd_hdr_dma[i]);
1346
1347                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1348                 if (hisi_hba->complete_hdr[i])
1349                         dma_free_coherent(dev, s,
1350                                           hisi_hba->complete_hdr[i],
1351                                           hisi_hba->complete_hdr_dma[i]);
1352         }
1353
1354         dma_pool_destroy(hisi_hba->status_buffer_pool);
1355         dma_pool_destroy(hisi_hba->command_table_pool);
1356         dma_pool_destroy(hisi_hba->sge_page_pool);
1357
1358         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1359         if (hisi_hba->itct)
1360                 dma_free_coherent(dev, s,
1361                                   hisi_hba->itct, hisi_hba->itct_dma);
1362
1363         s = max_command_entries * sizeof(struct hisi_sas_iost);
1364         if (hisi_hba->iost)
1365                 dma_free_coherent(dev, s,
1366                                   hisi_hba->iost, hisi_hba->iost_dma);
1367
1368         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1369         if (hisi_hba->breakpoint)
1370                 dma_free_coherent(dev, s,
1371                                   hisi_hba->breakpoint,
1372                                   hisi_hba->breakpoint_dma);
1373
1374
1375         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1376         if (hisi_hba->initial_fis)
1377                 dma_free_coherent(dev, s,
1378                                   hisi_hba->initial_fis,
1379                                   hisi_hba->initial_fis_dma);
1380
1381         s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1382         if (hisi_hba->sata_breakpoint)
1383                 dma_free_coherent(dev, s,
1384                                   hisi_hba->sata_breakpoint,
1385                                   hisi_hba->sata_breakpoint_dma);
1386
1387         if (hisi_hba->wq)
1388                 destroy_workqueue(hisi_hba->wq);
1389 }
1390
1391 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1392                                               const struct hisi_sas_hw *hw)
1393 {
1394         struct resource *res;
1395         struct Scsi_Host *shost;
1396         struct hisi_hba *hisi_hba;
1397         struct device *dev = &pdev->dev;
1398         struct device_node *np = pdev->dev.of_node;
1399
1400         shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1401         if (!shost)
1402                 goto err_out;
1403         hisi_hba = shost_priv(shost);
1404
1405         hisi_hba->hw = hw;
1406         hisi_hba->pdev = pdev;
1407         hisi_hba->shost = shost;
1408         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1409
1410         init_timer(&hisi_hba->timer);
1411
1412         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1413                                           SAS_ADDR_SIZE))
1414                 goto err_out;
1415
1416         if (np) {
1417                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1418                                         "hisilicon,sas-syscon");
1419                 if (IS_ERR(hisi_hba->ctrl))
1420                         goto err_out;
1421
1422                 if (device_property_read_u32(dev, "ctrl-reset-reg",
1423                                              &hisi_hba->ctrl_reset_reg))
1424                         goto err_out;
1425
1426                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1427                                              &hisi_hba->ctrl_reset_sts_reg))
1428                         goto err_out;
1429
1430                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1431                                              &hisi_hba->ctrl_clock_ena_reg))
1432                         goto err_out;
1433         }
1434
1435         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1436                 goto err_out;
1437
1438         if (device_property_read_u32(dev, "queue-count",
1439                                      &hisi_hba->queue_count))
1440                 goto err_out;
1441
1442         if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1443             dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1444                 dev_err(dev, "No usable DMA addressing method\n");
1445                 goto err_out;
1446         }
1447
1448         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1449         hisi_hba->regs = devm_ioremap_resource(dev, res);
1450         if (IS_ERR(hisi_hba->regs))
1451                 goto err_out;
1452
1453         if (hisi_sas_alloc(hisi_hba, shost)) {
1454                 hisi_sas_free(hisi_hba);
1455                 goto err_out;
1456         }
1457
1458         return shost;
1459 err_out:
1460         dev_err(dev, "shost alloc failed\n");
1461         return NULL;
1462 }
1463
1464 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1465 {
1466         int i;
1467
1468         for (i = 0; i < hisi_hba->n_phy; i++)
1469                 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1470                        hisi_hba->sas_addr,
1471                        SAS_ADDR_SIZE);
1472 }
1473
1474 int hisi_sas_probe(struct platform_device *pdev,
1475                          const struct hisi_sas_hw *hw)
1476 {
1477         struct Scsi_Host *shost;
1478         struct hisi_hba *hisi_hba;
1479         struct device *dev = &pdev->dev;
1480         struct asd_sas_phy **arr_phy;
1481         struct asd_sas_port **arr_port;
1482         struct sas_ha_struct *sha;
1483         int rc, phy_nr, port_nr, i;
1484
1485         shost = hisi_sas_shost_alloc(pdev, hw);
1486         if (!shost) {
1487                 rc = -ENOMEM;
1488                 goto err_out_ha;
1489         }
1490
1491         sha = SHOST_TO_SAS_HA(shost);
1492         hisi_hba = shost_priv(shost);
1493         platform_set_drvdata(pdev, sha);
1494
1495         phy_nr = port_nr = hisi_hba->n_phy;
1496
1497         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1498         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1499         if (!arr_phy || !arr_port)
1500                 return -ENOMEM;
1501
1502         sha->sas_phy = arr_phy;
1503         sha->sas_port = arr_port;
1504         sha->core.shost = shost;
1505         sha->lldd_ha = hisi_hba;
1506
1507         shost->transportt = hisi_sas_stt;
1508         shost->max_id = HISI_SAS_MAX_DEVICES;
1509         shost->max_lun = ~0;
1510         shost->max_channel = 1;
1511         shost->max_cmd_len = 16;
1512         shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1513         shost->can_queue = hisi_hba->hw->max_command_entries;
1514         shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1515
1516         sha->sas_ha_name = DRV_NAME;
1517         sha->dev = &hisi_hba->pdev->dev;
1518         sha->lldd_module = THIS_MODULE;
1519         sha->sas_addr = &hisi_hba->sas_addr[0];
1520         sha->num_phys = hisi_hba->n_phy;
1521         sha->core.shost = hisi_hba->shost;
1522
1523         for (i = 0; i < hisi_hba->n_phy; i++) {
1524                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1525                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1526         }
1527
1528         hisi_sas_init_add(hisi_hba);
1529
1530         rc = hisi_hba->hw->hw_init(hisi_hba);
1531         if (rc)
1532                 goto err_out_ha;
1533
1534         rc = scsi_add_host(shost, &pdev->dev);
1535         if (rc)
1536                 goto err_out_ha;
1537
1538         rc = sas_register_ha(sha);
1539         if (rc)
1540                 goto err_out_register_ha;
1541
1542         scsi_scan_host(shost);
1543
1544         return 0;
1545
1546 err_out_register_ha:
1547         scsi_remove_host(shost);
1548 err_out_ha:
1549         kfree(shost);
1550         return rc;
1551 }
1552 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1553
1554 int hisi_sas_remove(struct platform_device *pdev)
1555 {
1556         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1557         struct hisi_hba *hisi_hba = sha->lldd_ha;
1558
1559         scsi_remove_host(sha->core.shost);
1560         sas_unregister_ha(sha);
1561         sas_remove_host(sha->core.shost);
1562
1563         hisi_sas_free(hisi_hba);
1564         return 0;
1565 }
1566 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1567
1568 static __init int hisi_sas_init(void)
1569 {
1570         pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1571
1572         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1573         if (!hisi_sas_stt)
1574                 return -ENOMEM;
1575
1576         return 0;
1577 }
1578
1579 static __exit void hisi_sas_exit(void)
1580 {
1581         sas_release_transport(hisi_sas_stt);
1582 }
1583
1584 module_init(hisi_sas_init);
1585 module_exit(hisi_sas_exit);
1586
1587 MODULE_VERSION(DRV_VERSION);
1588 MODULE_LICENSE("GPL");
1589 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1590 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1591 MODULE_ALIAS("platform:" DRV_NAME);