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                 if (sas_protocol_ata(task->task_proto)) {
 209                         struct task_status_struct *ts = &task->task_status;
 210
 211                         dev_info(dev,
 212                                  "task prep: SATA/STP port%d not attach device\n",
 213                                  device->port->id);
 214                         ts->resp = SAS_TASK_COMPLETE;
 215                         ts->stat = SAS_PHY_DOWN;
 216                         task->task_done(task);
 217                 } else {
 218                         struct task_status_struct *ts = &task->task_status;
 219
 220                         dev_info(dev,
 221                                  "task prep: SAS port%d does not attach device\n",
 222                                  device->port->id);
 223                         ts->resp = SAS_TASK_UNDELIVERED;
 224                         ts->stat = SAS_PHY_DOWN;
 225                         task->task_done(task);
 226                 }
 227                 return 0;
 228         }
 229
 230         if (!sas_protocol_ata(task->task_proto)) {
 231                 if (task->num_scatter) {
 232                         n_elem = dma_map_sg(dev, task->scatter,
 233                                             task->num_scatter, task->data_dir);
 234                         if (!n_elem) {
 235                                 rc = -ENOMEM;
 236                                 goto prep_out;
 237                         }
 238                 }
 239         } else
 240                 n_elem = task->num_scatter;
 241
 242         if (hisi_hba->hw->slot_index_alloc)
 243                 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
 244                                                     device);
 245         else
 246                 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
 247         if (rc)
 248                 goto err_out;
 249         rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
 250                                          &dlvry_queue_slot);
 251         if (rc)
 252                 goto err_out_tag;
 253
 254         slot = &hisi_hba->slot_info[slot_idx];
 255         memset(slot, 0, sizeof(struct hisi_sas_slot));
 256
 257         slot->idx = slot_idx;
 258         slot->n_elem = n_elem;
 259         slot->dlvry_queue = dlvry_queue;
 260         slot->dlvry_queue_slot = dlvry_queue_slot;
 261         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 262         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 263         slot->task = task;
 264         slot->port = port;
 265         task->lldd_task = slot;
 266         INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
 267
 268         slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
 269                                              GFP_ATOMIC,
 270                                              &slot->status_buffer_dma);
 271         if (!slot->status_buffer) {
 272                 rc = -ENOMEM;
 273                 goto err_out_slot_buf;
 274         }
 275         memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
 276
 277         slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
 278                                              GFP_ATOMIC,
 279                                              &slot->command_table_dma);
 280         if (!slot->command_table) {
 281                 rc = -ENOMEM;
 282                 goto err_out_status_buf;
 283         }
 284         memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
 285         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 286
 287         switch (task->task_proto) {
 288         case SAS_PROTOCOL_SMP:
 289                 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
 290                 break;
 291         case SAS_PROTOCOL_SSP:
 292                 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
 293                 break;
 294         case SAS_PROTOCOL_SATA:
 295         case SAS_PROTOCOL_STP:
 296         case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 297                 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
 298                 break;
 299         default:
 300                 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
 301                         task->task_proto);
 302                 rc = -EINVAL;
 303                 break;
 304         }
 305
 306         if (rc) {
 307                 dev_err(dev, "task prep: rc = 0x%x\n", rc);
 308                 if (slot->sge_page)
 309                         goto err_out_sge;
 310                 goto err_out_command_table;
 311         }
 312
 313         list_add_tail(&slot->entry, &port->list);
 314         spin_lock(&task->task_state_lock);
 315         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 316         spin_unlock(&task->task_state_lock);
 317
 318         hisi_hba->slot_prep = slot;
 319
 320         sas_dev->running_req++;
 321         ++(*pass);
 322
 323         return 0;
 324
 325 err_out_sge:
 326         dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
 327                 slot->sge_page_dma);
 328 err_out_command_table:
 329         dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
 330                 slot->command_table_dma);
 331 err_out_status_buf:
 332         dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
 333                 slot->status_buffer_dma);
 334 err_out_slot_buf:
 335         /* Nothing to be done */
 336 err_out_tag:
 337         hisi_sas_slot_index_free(hisi_hba, slot_idx);
 338 err_out:
 339         dev_err(dev, "task prep: failed[%d]!\n", rc);
 340         if (!sas_protocol_ata(task->task_proto))
 341                 if (n_elem)
 342                         dma_unmap_sg(dev, task->scatter, n_elem,
 343                                      task->data_dir);
 344 prep_out:
 345         return rc;
 346 }
 347
 348 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
 349                               int is_tmf, struct hisi_sas_tmf_task *tmf)
 350 {
 351         u32 rc;
 352         u32 pass = 0;
 353         unsigned long flags;
 354         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 355         struct device *dev = &hisi_hba->pdev->dev;
 356
 357         /* protect task_prep and start_delivery sequence */
 358         spin_lock_irqsave(&hisi_hba->lock, flags);
 359         rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
 360         if (rc)
 361                 dev_err(dev, "task exec: failed[%d]!\n", rc);
 362
 363         if (likely(pass))
 364                 hisi_hba->hw->start_delivery(hisi_hba);
 365         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 366
 367         return rc;
 368 }
 369
 370 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
 371 {
 372         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 373         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 374         struct sas_ha_struct *sas_ha;
 375
 376         if (!phy->phy_attached)
 377                 return;
 378
 379         sas_ha = &hisi_hba->sha;
 380         sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
 381
 382         if (sas_phy->phy) {
 383                 struct sas_phy *sphy = sas_phy->phy;
 384
 385                 sphy->negotiated_linkrate = sas_phy->linkrate;
 386                 sphy->minimum_linkrate = phy->minimum_linkrate;
 387                 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 388                 sphy->maximum_linkrate = phy->maximum_linkrate;
 389         }
 390
 391         if (phy->phy_type & PORT_TYPE_SAS) {
 392                 struct sas_identify_frame *id;
 393
 394                 id = (struct sas_identify_frame *)phy->frame_rcvd;
 395                 id->dev_type = phy->identify.device_type;
 396                 id->initiator_bits = SAS_PROTOCOL_ALL;
 397                 id->target_bits = phy->identify.target_port_protocols;
 398         } else if (phy->phy_type & PORT_TYPE_SATA) {
 399                 /*Nothing*/
 400         }
 401
 402         sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 403         sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
 404 }
 405
 406 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 407 {
 408         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 409         struct hisi_sas_device *sas_dev = NULL;
 410         int i;
 411
 412         spin_lock(&hisi_hba->lock);
 413         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
 414                 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 415                         hisi_hba->devices[i].device_id = i;
 416                         sas_dev = &hisi_hba->devices[i];
 417                         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 418                         sas_dev->dev_type = device->dev_type;
 419                         sas_dev->hisi_hba = hisi_hba;
 420                         sas_dev->sas_device = device;
 421                         break;
 422                 }
 423         }
 424         spin_unlock(&hisi_hba->lock);
 425
 426         return sas_dev;
 427 }
 428
 429 static int hisi_sas_dev_found(struct domain_device *device)
 430 {
 431         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 432         struct domain_device *parent_dev = device->parent;
 433         struct hisi_sas_device *sas_dev;
 434         struct device *dev = &hisi_hba->pdev->dev;
 435
 436         if (hisi_hba->hw->alloc_dev)
 437                 sas_dev = hisi_hba->hw->alloc_dev(device);
 438         else
 439                 sas_dev = hisi_sas_alloc_dev(device);
 440         if (!sas_dev) {
 441                 dev_err(dev, "fail alloc dev: max support %d devices\n",
 442                         HISI_SAS_MAX_DEVICES);
 443                 return -EINVAL;
 444         }
 445
 446         device->lldd_dev = sas_dev;
 447         hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 448
 449         if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
 450                 int phy_no;
 451                 u8 phy_num = parent_dev->ex_dev.num_phys;
 452                 struct ex_phy *phy;
 453
 454                 for (phy_no = 0; phy_no < phy_num; phy_no++) {
 455                         phy = &parent_dev->ex_dev.ex_phy[phy_no];
 456                         if (SAS_ADDR(phy->attached_sas_addr) ==
 457                                 SAS_ADDR(device->sas_addr)) {
 458                                 sas_dev->attached_phy = phy_no;
 459                                 break;
 460                         }
 461                 }
 462
 463                 if (phy_no == phy_num) {
 464                         dev_info(dev, "dev found: no attached "
 465                                  "dev:%016llx at ex:%016llx\n",
 466                                  SAS_ADDR(device->sas_addr),
 467                                  SAS_ADDR(parent_dev->sas_addr));
 468                         return -EINVAL;
 469                 }
 470         }
 471
 472         return 0;
 473 }
 474
 475 static int hisi_sas_slave_configure(struct scsi_device *sdev)
 476 {
 477         struct domain_device *dev = sdev_to_domain_dev(sdev);
 478         int ret = sas_slave_configure(sdev);
 479
 480         if (ret)
 481                 return ret;
 482         if (!dev_is_sata(dev))
 483                 sas_change_queue_depth(sdev, 64);
 484
 485         return 0;
 486 }
 487
 488 static void hisi_sas_scan_start(struct Scsi_Host *shost)
 489 {
 490         struct hisi_hba *hisi_hba = shost_priv(shost);
 491         int i;
 492
 493         for (i = 0; i < hisi_hba->n_phy; ++i)
 494                 hisi_sas_bytes_dmaed(hisi_hba, i);
 495
 496         hisi_hba->scan_finished = 1;
 497 }
 498
 499 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 500 {
 501         struct hisi_hba *hisi_hba = shost_priv(shost);
 502         struct sas_ha_struct *sha = &hisi_hba->sha;
 503
 504         if (hisi_hba->scan_finished == 0)
 505                 return 0;
 506
 507         sas_drain_work(sha);
 508         return 1;
 509 }
 510
 511 static void hisi_sas_phyup_work(struct work_struct *work)
 512 {
 513         struct hisi_sas_phy *phy =
 514                 container_of(work, struct hisi_sas_phy, phyup_ws);
 515         struct hisi_hba *hisi_hba = phy->hisi_hba;
 516         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 517         int phy_no = sas_phy->id;
 518
 519         hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
 520         hisi_sas_bytes_dmaed(hisi_hba, phy_no);
 521 }
 522
 523 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
 524 {
 525         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 526         struct asd_sas_phy *sas_phy = &phy->sas_phy;
 527
 528         phy->hisi_hba = hisi_hba;
 529         phy->port = NULL;
 530         init_timer(&phy->timer);
 531         sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 532         sas_phy->class = SAS;
 533         sas_phy->iproto = SAS_PROTOCOL_ALL;
 534         sas_phy->tproto = 0;
 535         sas_phy->type = PHY_TYPE_PHYSICAL;
 536         sas_phy->role = PHY_ROLE_INITIATOR;
 537         sas_phy->oob_mode = OOB_NOT_CONNECTED;
 538         sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
 539         sas_phy->id = phy_no;
 540         sas_phy->sas_addr = &hisi_hba->sas_addr[0];
 541         sas_phy->frame_rcvd = &phy->frame_rcvd[0];
 542         sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
 543         sas_phy->lldd_phy = phy;
 544
 545         INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
 546 }
 547
 548 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
 549 {
 550         struct sas_ha_struct *sas_ha = sas_phy->ha;
 551         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 552         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 553         struct asd_sas_port *sas_port = sas_phy->port;
 554         struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
 555         unsigned long flags;
 556
 557         if (!sas_port)
 558                 return;
 559
 560         spin_lock_irqsave(&hisi_hba->lock, flags);
 561         port->port_attached = 1;
 562         port->id = phy->port_id;
 563         phy->port = port;
 564         sas_port->lldd_port = port;
 565         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 566 }
 567
 568 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
 569                                      struct domain_device *device)
 570 {
 571         struct hisi_sas_phy *phy;
 572         struct hisi_sas_port *port;
 573         struct hisi_sas_slot *slot, *slot2;
 574         struct device *dev = &hisi_hba->pdev->dev;
 575
 576         phy = &hisi_hba->phy[phy_no];
 577         port = phy->port;
 578         if (!port)
 579                 return;
 580
 581         list_for_each_entry_safe(slot, slot2, &port->list, entry) {
 582                 struct sas_task *task;
 583
 584                 task = slot->task;
 585                 if (device && task->dev != device)
 586                         continue;
 587
 588                 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
 589                          slot->dlvry_queue, slot->dlvry_queue_slot, task);
 590                 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
 591         }
 592 }
 593
 594 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
 595 {
 596         struct domain_device *device;
 597         struct hisi_sas_phy *phy = sas_phy->lldd_phy;
 598         struct asd_sas_port *sas_port = sas_phy->port;
 599
 600         list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
 601                 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
 602 }
 603
 604 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
 605                         struct domain_device *device)
 606 {
 607         struct asd_sas_port *port = device->port;
 608         struct asd_sas_phy *sas_phy;
 609
 610         list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
 611                 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
 612 }
 613
 614 static void hisi_sas_dev_gone(struct domain_device *device)
 615 {
 616         struct hisi_sas_device *sas_dev = device->lldd_dev;
 617         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 618         struct device *dev = &hisi_hba->pdev->dev;
 619         u64 dev_id = sas_dev->device_id;
 620
 621         dev_info(dev, "found dev[%lld:%x] is gone\n",
 622                  sas_dev->device_id, sas_dev->dev_type);
 623
 624         hisi_sas_internal_task_abort(hisi_hba, device,
 625                                      HISI_SAS_INT_ABT_DEV, 0);
 626
 627         hisi_hba->hw->free_device(hisi_hba, sas_dev);
 628         device->lldd_dev = NULL;
 629         memset(sas_dev, 0, sizeof(*sas_dev));
 630         sas_dev->device_id = dev_id;
 631         sas_dev->dev_type = SAS_PHY_UNUSED;
 632         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 633 }
 634
 635 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 636 {
 637         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
 638 }
 639
 640 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
 641                                 void *funcdata)
 642 {
 643         struct sas_ha_struct *sas_ha = sas_phy->ha;
 644         struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
 645         int phy_no = sas_phy->id;
 646
 647         switch (func) {
 648         case PHY_FUNC_HARD_RESET:
 649                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 650                 break;
 651
 652         case PHY_FUNC_LINK_RESET:
 653                 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
 654                 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
 655                 break;
 656
 657         case PHY_FUNC_DISABLE:
 658                 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
 659                 break;
 660
 661         case PHY_FUNC_SET_LINK_RATE:
 662         case PHY_FUNC_RELEASE_SPINUP_HOLD:
 663         default:
 664                 return -EOPNOTSUPP;
 665         }
 666         return 0;
 667 }
 668
 669 static void hisi_sas_task_done(struct sas_task *task)
 670 {
 671         if (!del_timer(&task->slow_task->timer))
 672                 return;
 673         complete(&task->slow_task->completion);
 674 }
 675
 676 static void hisi_sas_tmf_timedout(unsigned long data)
 677 {
 678         struct sas_task *task = (struct sas_task *)data;
 679
 680         task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 681         complete(&task->slow_task->completion);
 682 }
 683
 684 #define TASK_TIMEOUT 20
 685 #define TASK_RETRY 3
 686 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
 687                                            void *parameter, u32 para_len,
 688                                            struct hisi_sas_tmf_task *tmf)
 689 {
 690         struct hisi_sas_device *sas_dev = device->lldd_dev;
 691         struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 692         struct device *dev = &hisi_hba->pdev->dev;
 693         struct sas_task *task;
 694         int res, retry;
 695
 696         for (retry = 0; retry < TASK_RETRY; retry++) {
 697                 task = sas_alloc_slow_task(GFP_KERNEL);
 698                 if (!task)
 699                         return -ENOMEM;
 700
 701                 task->dev = device;
 702                 task->task_proto = device->tproto;
 703
 704                 memcpy(&task->ssp_task, parameter, para_len);
 705                 task->task_done = hisi_sas_task_done;
 706
 707                 task->slow_task->timer.data = (unsigned long) task;
 708                 task->slow_task->timer.function = hisi_sas_tmf_timedout;
 709                 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
 710                 add_timer(&task->slow_task->timer);
 711
 712                 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
 713
 714                 if (res) {
 715                         del_timer(&task->slow_task->timer);
 716                         dev_err(dev, "abort tmf: executing internal task failed: %d\n",
 717                                 res);
 718                         goto ex_err;
 719                 }
 720
 721                 wait_for_completion(&task->slow_task->completion);
 722                 res = TMF_RESP_FUNC_FAILED;
 723                 /* Even TMF timed out, return direct. */
 724                 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 725                         if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
 726                                 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
 727                                         tmf->tag_of_task_to_be_managed);
 728                                 if (task->lldd_task) {
 729                                         struct hisi_sas_slot *slot =
 730                                                 task->lldd_task;
 731
 732                                         hisi_sas_slot_task_free(hisi_hba,
 733                                                                 task, slot);
 734                                 }
 735
 736                                 goto ex_err;
 737                         }
 738                 }
 739
 740                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 741                      task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
 742                         res = TMF_RESP_FUNC_COMPLETE;
 743                         break;
 744                 }
 745
 746                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 747                         task->task_status.stat == TMF_RESP_FUNC_SUCC) {
 748                         res = TMF_RESP_FUNC_SUCC;
 749                         break;
 750                 }
 751
 752                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 753                       task->task_status.stat == SAS_DATA_UNDERRUN) {
 754                         /* no error, but return the number of bytes of
 755                          * underrun
 756                          */
 757                         dev_warn(dev, "abort tmf: task to dev %016llx "
 758                                  "resp: 0x%x sts 0x%x underrun\n",
 759                                  SAS_ADDR(device->sas_addr),
 760                                  task->task_status.resp,
 761                                  task->task_status.stat);
 762                         res = task->task_status.residual;
 763                         break;
 764                 }
 765
 766                 if (task->task_status.resp == SAS_TASK_COMPLETE &&
 767                         task->task_status.stat == SAS_DATA_OVERRUN) {
 768                         dev_warn(dev, "abort tmf: blocked task error\n");
 769                         res = -EMSGSIZE;
 770                         break;
 771                 }
 772
 773                 dev_warn(dev, "abort tmf: task to dev "
 774                          "%016llx resp: 0x%x status 0x%x\n",
 775                          SAS_ADDR(device->sas_addr), task->task_status.resp,
 776                          task->task_status.stat);
 777                 sas_free_task(task);
 778                 task = NULL;
 779         }
 780 ex_err:
 781         WARN_ON(retry == TASK_RETRY);
 782         sas_free_task(task);
 783         return res;
 784 }
 785
 786 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
 787                                 u8 *lun, struct hisi_sas_tmf_task *tmf)
 788 {
 789         struct sas_ssp_task ssp_task;
 790
 791         if (!(device->tproto & SAS_PROTOCOL_SSP))
 792                 return TMF_RESP_FUNC_ESUPP;
 793
 794         memcpy(ssp_task.LUN, lun, 8);
 795
 796         return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
 797                                 sizeof(ssp_task), tmf);
 798 }
 799
 800 static int hisi_sas_abort_task(struct sas_task *task)
 801 {
 802         struct scsi_lun lun;
 803         struct hisi_sas_tmf_task tmf_task;
 804         struct domain_device *device = task->dev;
 805         struct hisi_sas_device *sas_dev = device->lldd_dev;
 806         struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
 807         struct device *dev = &hisi_hba->pdev->dev;
 808         int rc = TMF_RESP_FUNC_FAILED;
 809         unsigned long flags;
 810
 811         if (!sas_dev) {
 812                 dev_warn(dev, "Device has been removed\n");
 813                 return TMF_RESP_FUNC_FAILED;
 814         }
 815
 816         spin_lock_irqsave(&task->task_state_lock, flags);
 817         if (task->task_state_flags & SAS_TASK_STATE_DONE) {
 818                 spin_unlock_irqrestore(&task->task_state_lock, flags);
 819                 rc = TMF_RESP_FUNC_COMPLETE;
 820                 goto out;
 821         }
 822
 823         spin_unlock_irqrestore(&task->task_state_lock, flags);
 824         sas_dev->dev_status = HISI_SAS_DEV_EH;
 825         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 826                 struct scsi_cmnd *cmnd = task->uldd_task;
 827                 struct hisi_sas_slot *slot = task->lldd_task;
 828                 u32 tag = slot->idx;
 829
 830                 int_to_scsilun(cmnd->device->lun, &lun);
 831                 tmf_task.tmf = TMF_ABORT_TASK;
 832                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 833
 834                 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
 835                                                   &tmf_task);
 836
 837                 /* if successful, clear the task and callback forwards.*/
 838                 if (rc == TMF_RESP_FUNC_COMPLETE) {
 839                         if (task->lldd_task) {
 840                                 struct hisi_sas_slot *slot;
 841
 842                                 slot = &hisi_hba->slot_info
 843                                         [tmf_task.tag_of_task_to_be_managed];
 844                                 spin_lock_irqsave(&hisi_hba->lock, flags);
 845                                 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
 846                                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 847                         }
 848                 }
 849
 850                 hisi_sas_internal_task_abort(hisi_hba, device,
 851                                              HISI_SAS_INT_ABT_CMD, tag);
 852         } else if (task->task_proto & SAS_PROTOCOL_SATA ||
 853                 task->task_proto & SAS_PROTOCOL_STP) {
 854                 if (task->dev->dev_type == SAS_SATA_DEV) {
 855                         hisi_sas_internal_task_abort(hisi_hba, device,
 856                                                      HISI_SAS_INT_ABT_DEV, 0);
 857                         rc = TMF_RESP_FUNC_COMPLETE;
 858                 }
 859         } else if (task->task_proto & SAS_PROTOCOL_SMP) {
 860                 /* SMP */
 861                 struct hisi_sas_slot *slot = task->lldd_task;
 862                 u32 tag = slot->idx;
 863
 864                 hisi_sas_internal_task_abort(hisi_hba, device,
 865                                              HISI_SAS_INT_ABT_CMD, tag);
 866         }
 867
 868 out:
 869         if (rc != TMF_RESP_FUNC_COMPLETE)
 870                 dev_notice(dev, "abort task: rc=%d\n", rc);
 871         return rc;
 872 }
 873
 874 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
 875 {
 876         struct hisi_sas_tmf_task tmf_task;
 877         int rc = TMF_RESP_FUNC_FAILED;
 878
 879         tmf_task.tmf = TMF_ABORT_TASK_SET;
 880         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 881
 882         return rc;
 883 }
 884
 885 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
 886 {
 887         int rc = TMF_RESP_FUNC_FAILED;
 888         struct hisi_sas_tmf_task tmf_task;
 889
 890         tmf_task.tmf = TMF_CLEAR_ACA;
 891         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 892
 893         return rc;
 894 }
 895
 896 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
 897 {
 898         struct sas_phy *phy = sas_get_local_phy(device);
 899         int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
 900                         (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
 901         rc = sas_phy_reset(phy, reset_type);
 902         sas_put_local_phy(phy);
 903         msleep(2000);
 904         return rc;
 905 }
 906
 907 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
 908 {
 909         struct hisi_sas_device *sas_dev = device->lldd_dev;
 910         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 911         unsigned long flags;
 912         int rc = TMF_RESP_FUNC_FAILED;
 913
 914         if (sas_dev->dev_status != HISI_SAS_DEV_EH)
 915                 return TMF_RESP_FUNC_FAILED;
 916         sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 917
 918         rc = hisi_sas_debug_I_T_nexus_reset(device);
 919
 920         spin_lock_irqsave(&hisi_hba->lock, flags);
 921         hisi_sas_release_task(hisi_hba, device);
 922         spin_unlock_irqrestore(&hisi_hba->lock, flags);
 923
 924         return 0;
 925 }
 926
 927 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
 928 {
 929         struct hisi_sas_tmf_task tmf_task;
 930         struct hisi_sas_device *sas_dev = device->lldd_dev;
 931         struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 932         struct device *dev = &hisi_hba->pdev->dev;
 933         unsigned long flags;
 934         int rc = TMF_RESP_FUNC_FAILED;
 935
 936         tmf_task.tmf = TMF_LU_RESET;
 937         sas_dev->dev_status = HISI_SAS_DEV_EH;
 938         rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
 939         if (rc == TMF_RESP_FUNC_COMPLETE) {
 940                 spin_lock_irqsave(&hisi_hba->lock, flags);
 941                 hisi_sas_release_task(hisi_hba, device);
 942                 spin_unlock_irqrestore(&hisi_hba->lock, flags);
 943         }
 944
 945         /* If failed, fall-through I_T_Nexus reset */
 946         dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
 947                 sas_dev->device_id, rc);
 948         return rc;
 949 }
 950
 951 static int hisi_sas_query_task(struct sas_task *task)
 952 {
 953         struct scsi_lun lun;
 954         struct hisi_sas_tmf_task tmf_task;
 955         int rc = TMF_RESP_FUNC_FAILED;
 956
 957         if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
 958                 struct scsi_cmnd *cmnd = task->uldd_task;
 959                 struct domain_device *device = task->dev;
 960                 struct hisi_sas_slot *slot = task->lldd_task;
 961                 u32 tag = slot->idx;
 962
 963                 int_to_scsilun(cmnd->device->lun, &lun);
 964                 tmf_task.tmf = TMF_QUERY_TASK;
 965                 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
 966
 967                 rc = hisi_sas_debug_issue_ssp_tmf(device,
 968                                                   lun.scsi_lun,
 969                                                   &tmf_task);
 970                 switch (rc) {
 971                 /* The task is still in Lun, release it then */
 972                 case TMF_RESP_FUNC_SUCC:
 973                 /* The task is not in Lun or failed, reset the phy */
 974                 case TMF_RESP_FUNC_FAILED:
 975                 case TMF_RESP_FUNC_COMPLETE:
 976                         break;
 977                 }
 978         }
 979         return rc;
 980 }
 981
 982 static int
 983 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id,
 984                                   struct sas_task *task, int abort_flag,
 985                                   int task_tag)
 986 {
 987         struct domain_device *device = task->dev;
 988         struct hisi_sas_device *sas_dev = device->lldd_dev;
 989         struct device *dev = &hisi_hba->pdev->dev;
 990         struct hisi_sas_port *port;
 991         struct hisi_sas_slot *slot;
 992         struct hisi_sas_cmd_hdr *cmd_hdr_base;
 993         int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
 994
 995         if (!device->port)
 996                 return -1;
 997
 998         port = device->port->lldd_port;
 999
1000         /* simply get a slot and send abort command */
1001         rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1002         if (rc)
1003                 goto err_out;
1004         rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
1005                                          &dlvry_queue_slot);
1006         if (rc)
1007                 goto err_out_tag;
1008
1009         slot = &hisi_hba->slot_info[slot_idx];
1010         memset(slot, 0, sizeof(struct hisi_sas_slot));
1011
1012         slot->idx = slot_idx;
1013         slot->n_elem = n_elem;
1014         slot->dlvry_queue = dlvry_queue;
1015         slot->dlvry_queue_slot = dlvry_queue_slot;
1016         cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1017         slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1018         slot->task = task;
1019         slot->port = port;
1020         task->lldd_task = slot;
1021
1022         memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1023
1024         rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1025                                       abort_flag, task_tag);
1026         if (rc)
1027                 goto err_out_tag;
1028
1029         /* Port structure is static for the HBA, so
1030         *  even if the port is deformed it is ok
1031         *  to reference.
1032         */
1033         list_add_tail(&slot->entry, &port->list);
1034         spin_lock(&task->task_state_lock);
1035         task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1036         spin_unlock(&task->task_state_lock);
1037
1038         hisi_hba->slot_prep = slot;
1039
1040         sas_dev->running_req++;
1041         /* send abort command to our chip */
1042         hisi_hba->hw->start_delivery(hisi_hba);
1043
1044         return 0;
1045
1046 err_out_tag:
1047         hisi_sas_slot_index_free(hisi_hba, slot_idx);
1048 err_out:
1049         dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1050
1051         return rc;
1052 }
1053
1054 /**
1055  * hisi_sas_internal_task_abort -- execute an internal
1056  * abort command for single IO command or a device
1057  * @hisi_hba: host controller struct
1058  * @device: domain device
1059  * @abort_flag: mode of operation, device or single IO
1060  * @tag: tag of IO to be aborted (only relevant to single
1061  *       IO mode)
1062  */
1063 static int
1064 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1065                              struct domain_device *device,
1066                              int abort_flag, int tag)
1067 {
1068         struct sas_task *task;
1069         struct hisi_sas_device *sas_dev = device->lldd_dev;
1070         struct device *dev = &hisi_hba->pdev->dev;
1071         int res;
1072         unsigned long flags;
1073
1074         if (!hisi_hba->hw->prep_abort)
1075                 return -EOPNOTSUPP;
1076
1077         task = sas_alloc_slow_task(GFP_KERNEL);
1078         if (!task)
1079                 return -ENOMEM;
1080
1081         task->dev = device;
1082         task->task_proto = device->tproto;
1083         task->task_done = hisi_sas_task_done;
1084         task->slow_task->timer.data = (unsigned long)task;
1085         task->slow_task->timer.function = hisi_sas_tmf_timedout;
1086         task->slow_task->timer.expires = jiffies + 20*HZ;
1087         add_timer(&task->slow_task->timer);
1088
1089         /* Lock as we are alloc'ing a slot, which cannot be interrupted */
1090         spin_lock_irqsave(&hisi_hba->lock, flags);
1091         res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1092                                                 task, abort_flag, tag);
1093         spin_unlock_irqrestore(&hisi_hba->lock, flags);
1094         if (res) {
1095                 del_timer(&task->slow_task->timer);
1096                 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1097                         res);
1098                 goto exit;
1099         }
1100         wait_for_completion(&task->slow_task->completion);
1101         res = TMF_RESP_FUNC_FAILED;
1102
1103         if (task->task_status.resp == SAS_TASK_COMPLETE &&
1104                 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1105                 res = TMF_RESP_FUNC_COMPLETE;
1106                 goto exit;
1107         }
1108
1109         /* TMF timed out, return direct. */
1110         if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1111                 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1112                         dev_err(dev, "internal task abort: timeout.\n");
1113                         if (task->lldd_task) {
1114                                 struct hisi_sas_slot *slot = task->lldd_task;
1115
1116                                 hisi_sas_slot_task_free(hisi_hba, task, slot);
1117                         }
1118                 }
1119         }
1120
1121 exit:
1122         dev_info(dev, "internal task abort: task to dev %016llx task=%p "
1123                 "resp: 0x%x sts 0x%x\n",
1124                 SAS_ADDR(device->sas_addr),
1125                 task,
1126                 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1127                 task->task_status.stat);
1128         sas_free_task(task);
1129
1130         return res;
1131 }
1132
1133 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1134 {
1135         hisi_sas_port_notify_formed(sas_phy);
1136 }
1137
1138 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1139 {
1140         hisi_sas_port_notify_deformed(sas_phy);
1141 }
1142
1143 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1144 {
1145         phy->phy_attached = 0;
1146         phy->phy_type = 0;
1147         phy->port = NULL;
1148 }
1149
1150 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1151 {
1152         struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1153         struct asd_sas_phy *sas_phy = &phy->sas_phy;
1154         struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1155
1156         if (rdy) {
1157                 /* Phy down but ready */
1158                 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1159                 hisi_sas_port_notify_formed(sas_phy);
1160         } else {
1161                 struct hisi_sas_port *port  = phy->port;
1162
1163                 /* Phy down and not ready */
1164                 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1165                 sas_phy_disconnected(sas_phy);
1166
1167                 if (port) {
1168                         if (phy->phy_type & PORT_TYPE_SAS) {
1169                                 int port_id = port->id;
1170
1171                                 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1172                                                                        port_id))
1173                                         port->port_attached = 0;
1174                         } else if (phy->phy_type & PORT_TYPE_SATA)
1175                                 port->port_attached = 0;
1176                 }
1177                 hisi_sas_phy_disconnected(phy);
1178         }
1179 }
1180 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1181
1182 static struct scsi_transport_template *hisi_sas_stt;
1183
1184 static struct scsi_host_template hisi_sas_sht = {
1185         .module                 = THIS_MODULE,
1186         .name                   = DRV_NAME,
1187         .queuecommand           = sas_queuecommand,
1188         .target_alloc           = sas_target_alloc,
1189         .slave_configure        = hisi_sas_slave_configure,
1190         .scan_finished          = hisi_sas_scan_finished,
1191         .scan_start             = hisi_sas_scan_start,
1192         .change_queue_depth     = sas_change_queue_depth,
1193         .bios_param             = sas_bios_param,
1194         .can_queue              = 1,
1195         .this_id                = -1,
1196         .sg_tablesize           = SG_ALL,
1197         .max_sectors            = SCSI_DEFAULT_MAX_SECTORS,
1198         .use_clustering         = ENABLE_CLUSTERING,
1199         .eh_device_reset_handler = sas_eh_device_reset_handler,
1200         .eh_bus_reset_handler   = sas_eh_bus_reset_handler,
1201         .target_destroy         = sas_target_destroy,
1202         .ioctl                  = sas_ioctl,
1203 };
1204
1205 static struct sas_domain_function_template hisi_sas_transport_ops = {
1206         .lldd_dev_found         = hisi_sas_dev_found,
1207         .lldd_dev_gone          = hisi_sas_dev_gone,
1208         .lldd_execute_task      = hisi_sas_queue_command,
1209         .lldd_control_phy       = hisi_sas_control_phy,
1210         .lldd_abort_task        = hisi_sas_abort_task,
1211         .lldd_abort_task_set    = hisi_sas_abort_task_set,
1212         .lldd_clear_aca         = hisi_sas_clear_aca,
1213         .lldd_I_T_nexus_reset   = hisi_sas_I_T_nexus_reset,
1214         .lldd_lu_reset          = hisi_sas_lu_reset,
1215         .lldd_query_task        = hisi_sas_query_task,
1216         .lldd_port_formed       = hisi_sas_port_formed,
1217         .lldd_port_deformed     = hisi_sas_port_deformed,
1218 };
1219
1220 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1221 {
1222         struct platform_device *pdev = hisi_hba->pdev;
1223         struct device *dev = &pdev->dev;
1224         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1225
1226         spin_lock_init(&hisi_hba->lock);
1227         for (i = 0; i < hisi_hba->n_phy; i++) {
1228                 hisi_sas_phy_init(hisi_hba, i);
1229                 hisi_hba->port[i].port_attached = 0;
1230                 hisi_hba->port[i].id = -1;
1231                 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1232         }
1233
1234         for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1235                 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1236                 hisi_hba->devices[i].device_id = i;
1237                 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1238         }
1239
1240         for (i = 0; i < hisi_hba->queue_count; i++) {
1241                 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1242                 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1243
1244                 /* Completion queue structure */
1245                 cq->id = i;
1246                 cq->hisi_hba = hisi_hba;
1247
1248                 /* Delivery queue structure */
1249                 dq->id = i;
1250                 dq->hisi_hba = hisi_hba;
1251
1252                 /* Delivery queue */
1253                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1254                 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1255                                         &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1256                 if (!hisi_hba->cmd_hdr[i])
1257                         goto err_out;
1258                 memset(hisi_hba->cmd_hdr[i], 0, s);
1259
1260                 /* Completion queue */
1261                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1262                 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1263                                 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1264                 if (!hisi_hba->complete_hdr[i])
1265                         goto err_out;
1266                 memset(hisi_hba->complete_hdr[i], 0, s);
1267         }
1268
1269         s = HISI_SAS_STATUS_BUF_SZ;
1270         hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1271                                                        dev, s, 16, 0);
1272         if (!hisi_hba->status_buffer_pool)
1273                 goto err_out;
1274
1275         s = HISI_SAS_COMMAND_TABLE_SZ;
1276         hisi_hba->command_table_pool = dma_pool_create("command_table",
1277                                                        dev, s, 16, 0);
1278         if (!hisi_hba->command_table_pool)
1279                 goto err_out;
1280
1281         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1282         hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1283                                             GFP_KERNEL);
1284         if (!hisi_hba->itct)
1285                 goto err_out;
1286
1287         memset(hisi_hba->itct, 0, s);
1288
1289         hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1290                                            sizeof(struct hisi_sas_slot),
1291                                            GFP_KERNEL);
1292         if (!hisi_hba->slot_info)
1293                 goto err_out;
1294
1295         s = max_command_entries * sizeof(struct hisi_sas_iost);
1296         hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1297                                             GFP_KERNEL);
1298         if (!hisi_hba->iost)
1299                 goto err_out;
1300
1301         memset(hisi_hba->iost, 0, s);
1302
1303         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1304         hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1305                                 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1306         if (!hisi_hba->breakpoint)
1307                 goto err_out;
1308
1309         memset(hisi_hba->breakpoint, 0, s);
1310
1311         hisi_hba->slot_index_count = max_command_entries;
1312         s = hisi_hba->slot_index_count / sizeof(unsigned long);
1313         hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1314         if (!hisi_hba->slot_index_tags)
1315                 goto err_out;
1316
1317         hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1318                                 sizeof(struct hisi_sas_sge_page), 16, 0);
1319         if (!hisi_hba->sge_page_pool)
1320                 goto err_out;
1321
1322         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1323         hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1324                                 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1325         if (!hisi_hba->initial_fis)
1326                 goto err_out;
1327         memset(hisi_hba->initial_fis, 0, s);
1328
1329         s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1330         hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1331                                 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1332         if (!hisi_hba->sata_breakpoint)
1333                 goto err_out;
1334         memset(hisi_hba->sata_breakpoint, 0, s);
1335
1336         hisi_sas_slot_index_init(hisi_hba);
1337
1338         hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1339         if (!hisi_hba->wq) {
1340                 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1341                 goto err_out;
1342         }
1343
1344         return 0;
1345 err_out:
1346         return -ENOMEM;
1347 }
1348
1349 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1350 {
1351         struct device *dev = &hisi_hba->pdev->dev;
1352         int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1353
1354         for (i = 0; i < hisi_hba->queue_count; i++) {
1355                 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1356                 if (hisi_hba->cmd_hdr[i])
1357                         dma_free_coherent(dev, s,
1358                                           hisi_hba->cmd_hdr[i],
1359                                           hisi_hba->cmd_hdr_dma[i]);
1360
1361                 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1362                 if (hisi_hba->complete_hdr[i])
1363                         dma_free_coherent(dev, s,
1364                                           hisi_hba->complete_hdr[i],
1365                                           hisi_hba->complete_hdr_dma[i]);
1366         }
1367
1368         dma_pool_destroy(hisi_hba->status_buffer_pool);
1369         dma_pool_destroy(hisi_hba->command_table_pool);
1370         dma_pool_destroy(hisi_hba->sge_page_pool);
1371
1372         s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1373         if (hisi_hba->itct)
1374                 dma_free_coherent(dev, s,
1375                                   hisi_hba->itct, hisi_hba->itct_dma);
1376
1377         s = max_command_entries * sizeof(struct hisi_sas_iost);
1378         if (hisi_hba->iost)
1379                 dma_free_coherent(dev, s,
1380                                   hisi_hba->iost, hisi_hba->iost_dma);
1381
1382         s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1383         if (hisi_hba->breakpoint)
1384                 dma_free_coherent(dev, s,
1385                                   hisi_hba->breakpoint,
1386                                   hisi_hba->breakpoint_dma);
1387
1388
1389         s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1390         if (hisi_hba->initial_fis)
1391                 dma_free_coherent(dev, s,
1392                                   hisi_hba->initial_fis,
1393                                   hisi_hba->initial_fis_dma);
1394
1395         s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1396         if (hisi_hba->sata_breakpoint)
1397                 dma_free_coherent(dev, s,
1398                                   hisi_hba->sata_breakpoint,
1399                                   hisi_hba->sata_breakpoint_dma);
1400
1401         if (hisi_hba->wq)
1402                 destroy_workqueue(hisi_hba->wq);
1403 }
1404
1405 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1406                                               const struct hisi_sas_hw *hw)
1407 {
1408         struct resource *res;
1409         struct Scsi_Host *shost;
1410         struct hisi_hba *hisi_hba;
1411         struct device *dev = &pdev->dev;
1412         struct device_node *np = pdev->dev.of_node;
1413
1414         shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1415         if (!shost)
1416                 goto err_out;
1417         hisi_hba = shost_priv(shost);
1418
1419         hisi_hba->hw = hw;
1420         hisi_hba->pdev = pdev;
1421         hisi_hba->shost = shost;
1422         SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1423
1424         init_timer(&hisi_hba->timer);
1425
1426         if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1427                                           SAS_ADDR_SIZE))
1428                 goto err_out;
1429
1430         if (np) {
1431                 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1432                                         "hisilicon,sas-syscon");
1433                 if (IS_ERR(hisi_hba->ctrl))
1434                         goto err_out;
1435
1436                 if (device_property_read_u32(dev, "ctrl-reset-reg",
1437                                              &hisi_hba->ctrl_reset_reg))
1438                         goto err_out;
1439
1440                 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1441                                              &hisi_hba->ctrl_reset_sts_reg))
1442                         goto err_out;
1443
1444                 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1445                                              &hisi_hba->ctrl_clock_ena_reg))
1446                         goto err_out;
1447         }
1448
1449         if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1450                 goto err_out;
1451
1452         if (device_property_read_u32(dev, "queue-count",
1453                                      &hisi_hba->queue_count))
1454                 goto err_out;
1455
1456         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1457         hisi_hba->regs = devm_ioremap_resource(dev, res);
1458         if (IS_ERR(hisi_hba->regs))
1459                 goto err_out;
1460
1461         if (hisi_sas_alloc(hisi_hba, shost)) {
1462                 hisi_sas_free(hisi_hba);
1463                 goto err_out;
1464         }
1465
1466         return shost;
1467 err_out:
1468         dev_err(dev, "shost alloc failed\n");
1469         return NULL;
1470 }
1471
1472 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1473 {
1474         int i;
1475
1476         for (i = 0; i < hisi_hba->n_phy; i++)
1477                 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1478                        hisi_hba->sas_addr,
1479                        SAS_ADDR_SIZE);
1480 }
1481
1482 int hisi_sas_probe(struct platform_device *pdev,
1483                          const struct hisi_sas_hw *hw)
1484 {
1485         struct Scsi_Host *shost;
1486         struct hisi_hba *hisi_hba;
1487         struct device *dev = &pdev->dev;
1488         struct asd_sas_phy **arr_phy;
1489         struct asd_sas_port **arr_port;
1490         struct sas_ha_struct *sha;
1491         int rc, phy_nr, port_nr, i;
1492
1493         shost = hisi_sas_shost_alloc(pdev, hw);
1494         if (!shost) {
1495                 rc = -ENOMEM;
1496                 goto err_out_ha;
1497         }
1498
1499         sha = SHOST_TO_SAS_HA(shost);
1500         hisi_hba = shost_priv(shost);
1501         platform_set_drvdata(pdev, sha);
1502
1503         if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1504             dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1505                 dev_err(dev, "No usable DMA addressing method\n");
1506                 rc = -EIO;
1507                 goto err_out_ha;
1508         }
1509
1510         phy_nr = port_nr = hisi_hba->n_phy;
1511
1512         arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1513         arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1514         if (!arr_phy || !arr_port)
1515                 return -ENOMEM;
1516
1517         sha->sas_phy = arr_phy;
1518         sha->sas_port = arr_port;
1519         sha->core.shost = shost;
1520         sha->lldd_ha = hisi_hba;
1521
1522         shost->transportt = hisi_sas_stt;
1523         shost->max_id = HISI_SAS_MAX_DEVICES;
1524         shost->max_lun = ~0;
1525         shost->max_channel = 1;
1526         shost->max_cmd_len = 16;
1527         shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1528         shost->can_queue = hisi_hba->hw->max_command_entries;
1529         shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1530
1531         sha->sas_ha_name = DRV_NAME;
1532         sha->dev = &hisi_hba->pdev->dev;
1533         sha->lldd_module = THIS_MODULE;
1534         sha->sas_addr = &hisi_hba->sas_addr[0];
1535         sha->num_phys = hisi_hba->n_phy;
1536         sha->core.shost = hisi_hba->shost;
1537
1538         for (i = 0; i < hisi_hba->n_phy; i++) {
1539                 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1540                 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1541         }
1542
1543         hisi_sas_init_add(hisi_hba);
1544
1545         rc = hisi_hba->hw->hw_init(hisi_hba);
1546         if (rc)
1547                 goto err_out_ha;
1548
1549         rc = scsi_add_host(shost, &pdev->dev);
1550         if (rc)
1551                 goto err_out_ha;
1552
1553         rc = sas_register_ha(sha);
1554         if (rc)
1555                 goto err_out_register_ha;
1556
1557         scsi_scan_host(shost);
1558
1559         return 0;
1560
1561 err_out_register_ha:
1562         scsi_remove_host(shost);
1563 err_out_ha:
1564         kfree(shost);
1565         return rc;
1566 }
1567 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1568
1569 int hisi_sas_remove(struct platform_device *pdev)
1570 {
1571         struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1572         struct hisi_hba *hisi_hba = sha->lldd_ha;
1573
1574         scsi_remove_host(sha->core.shost);
1575         sas_unregister_ha(sha);
1576         sas_remove_host(sha->core.shost);
1577
1578         hisi_sas_free(hisi_hba);
1579         return 0;
1580 }
1581 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1582
1583 static __init int hisi_sas_init(void)
1584 {
1585         pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1586
1587         hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1588         if (!hisi_sas_stt)
1589                 return -ENOMEM;
1590
1591         return 0;
1592 }
1593
1594 static __exit void hisi_sas_exit(void)
1595 {
1596         sas_release_transport(hisi_sas_stt);
1597 }
1598
1599 module_init(hisi_sas_init);
1600 module_exit(hisi_sas_exit);
1601
1602 MODULE_VERSION(DRV_VERSION);
1603 MODULE_LICENSE("GPL");
1604 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1605 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1606 MODULE_ALIAS("platform:" DRV_NAME);