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 static int hisi_sas_softreset_ata_disk(struct domain_device *device); 25 26 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) 27 { 28 return device->port->ha->lldd_ha; 29 } 30 31 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port) 32 { 33 return container_of(sas_port, struct hisi_sas_port, sas_port); 34 } 35 EXPORT_SYMBOL_GPL(to_hisi_sas_port); 36 37 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) 38 { 39 void *bitmap = hisi_hba->slot_index_tags; 40 41 clear_bit(slot_idx, bitmap); 42 } 43 44 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) 45 { 46 hisi_sas_slot_index_clear(hisi_hba, slot_idx); 47 } 48 49 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) 50 { 51 void *bitmap = hisi_hba->slot_index_tags; 52 53 set_bit(slot_idx, bitmap); 54 } 55 56 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx) 57 { 58 unsigned int index; 59 void *bitmap = hisi_hba->slot_index_tags; 60 61 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count); 62 if (index >= hisi_hba->slot_index_count) 63 return -SAS_QUEUE_FULL; 64 hisi_sas_slot_index_set(hisi_hba, index); 65 *slot_idx = index; 66 return 0; 67 } 68 69 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba) 70 { 71 int i; 72 73 for (i = 0; i < hisi_hba->slot_index_count; ++i) 74 hisi_sas_slot_index_clear(hisi_hba, i); 75 } 76 77 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, 78 struct hisi_sas_slot *slot) 79 { 80 81 if (task) { 82 struct device *dev = &hisi_hba->pdev->dev; 83 struct domain_device *device = task->dev; 84 struct hisi_sas_device *sas_dev = device->lldd_dev; 85 86 if (!sas_protocol_ata(task->task_proto)) 87 if (slot->n_elem) 88 dma_unmap_sg(dev, task->scatter, slot->n_elem, 89 task->data_dir); 90 91 task->lldd_task = NULL; 92 93 if (sas_dev) 94 atomic64_dec(&sas_dev->running_req); 95 } 96 97 if (slot->command_table) 98 dma_pool_free(hisi_hba->command_table_pool, 99 slot->command_table, slot->command_table_dma); 100 101 if (slot->status_buffer) 102 dma_pool_free(hisi_hba->status_buffer_pool, 103 slot->status_buffer, slot->status_buffer_dma); 104 105 if (slot->sge_page) 106 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page, 107 slot->sge_page_dma); 108 109 list_del_init(&slot->entry); 110 slot->task = NULL; 111 slot->port = NULL; 112 hisi_sas_slot_index_free(hisi_hba, slot->idx); 113 114 /* slot memory is fully zeroed when it is reused */ 115 } 116 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); 117 118 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba, 119 struct hisi_sas_slot *slot) 120 { 121 return hisi_hba->hw->prep_smp(hisi_hba, slot); 122 } 123 124 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba, 125 struct hisi_sas_slot *slot, int is_tmf, 126 struct hisi_sas_tmf_task *tmf) 127 { 128 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf); 129 } 130 131 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba, 132 struct hisi_sas_slot *slot) 133 { 134 return hisi_hba->hw->prep_stp(hisi_hba, slot); 135 } 136 137 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba, 138 struct hisi_sas_slot *slot, 139 int device_id, int abort_flag, int tag_to_abort) 140 { 141 return hisi_hba->hw->prep_abort(hisi_hba, slot, 142 device_id, abort_flag, tag_to_abort); 143 } 144 145 /* 146 * This function will issue an abort TMF regardless of whether the 147 * task is in the sdev or not. Then it will do the task complete 148 * cleanup and callbacks. 149 */ 150 static void hisi_sas_slot_abort(struct work_struct *work) 151 { 152 struct hisi_sas_slot *abort_slot = 153 container_of(work, struct hisi_sas_slot, abort_slot); 154 struct sas_task *task = abort_slot->task; 155 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); 156 struct scsi_cmnd *cmnd = task->uldd_task; 157 struct hisi_sas_tmf_task tmf_task; 158 struct scsi_lun lun; 159 struct device *dev = &hisi_hba->pdev->dev; 160 int tag = abort_slot->idx; 161 unsigned long flags; 162 163 if (!(task->task_proto & SAS_PROTOCOL_SSP)) { 164 dev_err(dev, "cannot abort slot for non-ssp task\n"); 165 goto out; 166 } 167 168 int_to_scsilun(cmnd->device->lun, &lun); 169 tmf_task.tmf = TMF_ABORT_TASK; 170 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); 171 172 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task); 173 out: 174 /* Do cleanup for this task */ 175 spin_lock_irqsave(&hisi_hba->lock, flags); 176 hisi_sas_slot_task_free(hisi_hba, task, abort_slot); 177 spin_unlock_irqrestore(&hisi_hba->lock, flags); 178 if (task->task_done) 179 task->task_done(task); 180 } 181 182 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba, 183 int is_tmf, struct hisi_sas_tmf_task *tmf, 184 int *pass) 185 { 186 struct domain_device *device = task->dev; 187 struct hisi_sas_device *sas_dev = device->lldd_dev; 188 struct hisi_sas_port *port; 189 struct hisi_sas_slot *slot; 190 struct hisi_sas_cmd_hdr *cmd_hdr_base; 191 struct asd_sas_port *sas_port = device->port; 192 struct device *dev = &hisi_hba->pdev->dev; 193 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; 194 unsigned long flags; 195 196 if (!sas_port) { 197 struct task_status_struct *ts = &task->task_status; 198 199 ts->resp = SAS_TASK_UNDELIVERED; 200 ts->stat = SAS_PHY_DOWN; 201 /* 202 * libsas will use dev->port, should 203 * not call task_done for sata 204 */ 205 if (device->dev_type != SAS_SATA_DEV) 206 task->task_done(task); 207 return SAS_PHY_DOWN; 208 } 209 210 if (DEV_IS_GONE(sas_dev)) { 211 if (sas_dev) 212 dev_info(dev, "task prep: device %llu not ready\n", 213 sas_dev->device_id); 214 else 215 dev_info(dev, "task prep: device %016llx not ready\n", 216 SAS_ADDR(device->sas_addr)); 217 218 return SAS_PHY_DOWN; 219 } 220 221 port = to_hisi_sas_port(sas_port); 222 if (port && !port->port_attached) { 223 dev_info(dev, "task prep: %s port%d not attach device\n", 224 (dev_is_sata(device)) ? 225 "SATA/STP" : "SAS", 226 device->port->id); 227 228 return SAS_PHY_DOWN; 229 } 230 231 if (!sas_protocol_ata(task->task_proto)) { 232 if (task->num_scatter) { 233 n_elem = dma_map_sg(dev, task->scatter, 234 task->num_scatter, task->data_dir); 235 if (!n_elem) { 236 rc = -ENOMEM; 237 goto prep_out; 238 } 239 } 240 } else 241 n_elem = task->num_scatter; 242 243 if (hisi_hba->hw->slot_index_alloc) 244 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx, 245 device); 246 else 247 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx); 248 if (rc) 249 goto err_out; 250 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id, 251 &dlvry_queue, &dlvry_queue_slot); 252 if (rc) 253 goto err_out_tag; 254 255 slot = &hisi_hba->slot_info[slot_idx]; 256 memset(slot, 0, sizeof(struct hisi_sas_slot)); 257 258 slot->idx = slot_idx; 259 slot->n_elem = n_elem; 260 slot->dlvry_queue = dlvry_queue; 261 slot->dlvry_queue_slot = dlvry_queue_slot; 262 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 263 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 264 slot->task = task; 265 slot->port = port; 266 task->lldd_task = slot; 267 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort); 268 269 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool, 270 GFP_ATOMIC, 271 &slot->status_buffer_dma); 272 if (!slot->status_buffer) { 273 rc = -ENOMEM; 274 goto err_out_slot_buf; 275 } 276 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ); 277 278 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool, 279 GFP_ATOMIC, 280 &slot->command_table_dma); 281 if (!slot->command_table) { 282 rc = -ENOMEM; 283 goto err_out_status_buf; 284 } 285 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ); 286 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 287 288 switch (task->task_proto) { 289 case SAS_PROTOCOL_SMP: 290 rc = hisi_sas_task_prep_smp(hisi_hba, slot); 291 break; 292 case SAS_PROTOCOL_SSP: 293 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf); 294 break; 295 case SAS_PROTOCOL_SATA: 296 case SAS_PROTOCOL_STP: 297 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: 298 rc = hisi_sas_task_prep_ata(hisi_hba, slot); 299 break; 300 default: 301 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n", 302 task->task_proto); 303 rc = -EINVAL; 304 break; 305 } 306 307 if (rc) { 308 dev_err(dev, "task prep: rc = 0x%x\n", rc); 309 if (slot->sge_page) 310 goto err_out_sge; 311 goto err_out_command_table; 312 } 313 314 list_add_tail(&slot->entry, &sas_dev->list); 315 spin_lock_irqsave(&task->task_state_lock, flags); 316 task->task_state_flags |= SAS_TASK_AT_INITIATOR; 317 spin_unlock_irqrestore(&task->task_state_lock, flags); 318 319 hisi_hba->slot_prep = slot; 320 321 atomic64_inc(&sas_dev->running_req); 322 ++(*pass); 323 324 return 0; 325 326 err_out_sge: 327 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page, 328 slot->sge_page_dma); 329 err_out_command_table: 330 dma_pool_free(hisi_hba->command_table_pool, slot->command_table, 331 slot->command_table_dma); 332 err_out_status_buf: 333 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer, 334 slot->status_buffer_dma); 335 err_out_slot_buf: 336 /* Nothing to be done */ 337 err_out_tag: 338 hisi_sas_slot_index_free(hisi_hba, slot_idx); 339 err_out: 340 dev_err(dev, "task prep: failed[%d]!\n", rc); 341 if (!sas_protocol_ata(task->task_proto)) 342 if (n_elem) 343 dma_unmap_sg(dev, task->scatter, n_elem, 344 task->data_dir); 345 prep_out: 346 return rc; 347 } 348 349 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags, 350 int is_tmf, struct hisi_sas_tmf_task *tmf) 351 { 352 u32 rc; 353 u32 pass = 0; 354 unsigned long flags; 355 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); 356 struct device *dev = &hisi_hba->pdev->dev; 357 358 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))) 359 return -EINVAL; 360 361 /* protect task_prep and start_delivery sequence */ 362 spin_lock_irqsave(&hisi_hba->lock, flags); 363 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass); 364 if (rc) 365 dev_err(dev, "task exec: failed[%d]!\n", rc); 366 367 if (likely(pass)) 368 hisi_hba->hw->start_delivery(hisi_hba); 369 spin_unlock_irqrestore(&hisi_hba->lock, flags); 370 371 return rc; 372 } 373 374 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no) 375 { 376 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 377 struct asd_sas_phy *sas_phy = &phy->sas_phy; 378 struct sas_ha_struct *sas_ha; 379 380 if (!phy->phy_attached) 381 return; 382 383 sas_ha = &hisi_hba->sha; 384 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE); 385 386 if (sas_phy->phy) { 387 struct sas_phy *sphy = sas_phy->phy; 388 389 sphy->negotiated_linkrate = sas_phy->linkrate; 390 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; 391 sphy->maximum_linkrate_hw = 392 hisi_hba->hw->phy_get_max_linkrate(); 393 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) 394 sphy->minimum_linkrate = phy->minimum_linkrate; 395 396 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) 397 sphy->maximum_linkrate = phy->maximum_linkrate; 398 } 399 400 if (phy->phy_type & PORT_TYPE_SAS) { 401 struct sas_identify_frame *id; 402 403 id = (struct sas_identify_frame *)phy->frame_rcvd; 404 id->dev_type = phy->identify.device_type; 405 id->initiator_bits = SAS_PROTOCOL_ALL; 406 id->target_bits = phy->identify.target_port_protocols; 407 } else if (phy->phy_type & PORT_TYPE_SATA) { 408 /*Nothing*/ 409 } 410 411 sas_phy->frame_rcvd_size = phy->frame_rcvd_size; 412 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED); 413 } 414 415 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) 416 { 417 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 418 struct hisi_sas_device *sas_dev = NULL; 419 int i; 420 421 spin_lock(&hisi_hba->lock); 422 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 423 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) { 424 hisi_hba->devices[i].device_id = i; 425 sas_dev = &hisi_hba->devices[i]; 426 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 427 sas_dev->dev_type = device->dev_type; 428 sas_dev->hisi_hba = hisi_hba; 429 sas_dev->sas_device = device; 430 INIT_LIST_HEAD(&hisi_hba->devices[i].list); 431 break; 432 } 433 } 434 spin_unlock(&hisi_hba->lock); 435 436 return sas_dev; 437 } 438 439 static int hisi_sas_dev_found(struct domain_device *device) 440 { 441 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 442 struct domain_device *parent_dev = device->parent; 443 struct hisi_sas_device *sas_dev; 444 struct device *dev = &hisi_hba->pdev->dev; 445 446 if (hisi_hba->hw->alloc_dev) 447 sas_dev = hisi_hba->hw->alloc_dev(device); 448 else 449 sas_dev = hisi_sas_alloc_dev(device); 450 if (!sas_dev) { 451 dev_err(dev, "fail alloc dev: max support %d devices\n", 452 HISI_SAS_MAX_DEVICES); 453 return -EINVAL; 454 } 455 456 device->lldd_dev = sas_dev; 457 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 458 459 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) { 460 int phy_no; 461 u8 phy_num = parent_dev->ex_dev.num_phys; 462 struct ex_phy *phy; 463 464 for (phy_no = 0; phy_no < phy_num; phy_no++) { 465 phy = &parent_dev->ex_dev.ex_phy[phy_no]; 466 if (SAS_ADDR(phy->attached_sas_addr) == 467 SAS_ADDR(device->sas_addr)) { 468 sas_dev->attached_phy = phy_no; 469 break; 470 } 471 } 472 473 if (phy_no == phy_num) { 474 dev_info(dev, "dev found: no attached " 475 "dev:%016llx at ex:%016llx\n", 476 SAS_ADDR(device->sas_addr), 477 SAS_ADDR(parent_dev->sas_addr)); 478 return -EINVAL; 479 } 480 } 481 482 return 0; 483 } 484 485 static int hisi_sas_slave_configure(struct scsi_device *sdev) 486 { 487 struct domain_device *dev = sdev_to_domain_dev(sdev); 488 int ret = sas_slave_configure(sdev); 489 490 if (ret) 491 return ret; 492 if (!dev_is_sata(dev)) 493 sas_change_queue_depth(sdev, 64); 494 495 return 0; 496 } 497 498 static void hisi_sas_scan_start(struct Scsi_Host *shost) 499 { 500 struct hisi_hba *hisi_hba = shost_priv(shost); 501 502 hisi_hba->hw->phys_init(hisi_hba); 503 } 504 505 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time) 506 { 507 struct hisi_hba *hisi_hba = shost_priv(shost); 508 struct sas_ha_struct *sha = &hisi_hba->sha; 509 510 /* Wait for PHY up interrupt to occur */ 511 if (time < HZ) 512 return 0; 513 514 sas_drain_work(sha); 515 return 1; 516 } 517 518 static void hisi_sas_phyup_work(struct work_struct *work) 519 { 520 struct hisi_sas_phy *phy = 521 container_of(work, struct hisi_sas_phy, phyup_ws); 522 struct hisi_hba *hisi_hba = phy->hisi_hba; 523 struct asd_sas_phy *sas_phy = &phy->sas_phy; 524 int phy_no = sas_phy->id; 525 526 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */ 527 hisi_sas_bytes_dmaed(hisi_hba, phy_no); 528 } 529 530 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) 531 { 532 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 533 struct asd_sas_phy *sas_phy = &phy->sas_phy; 534 535 phy->hisi_hba = hisi_hba; 536 phy->port = NULL; 537 init_timer(&phy->timer); 538 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0; 539 sas_phy->class = SAS; 540 sas_phy->iproto = SAS_PROTOCOL_ALL; 541 sas_phy->tproto = 0; 542 sas_phy->type = PHY_TYPE_PHYSICAL; 543 sas_phy->role = PHY_ROLE_INITIATOR; 544 sas_phy->oob_mode = OOB_NOT_CONNECTED; 545 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; 546 sas_phy->id = phy_no; 547 sas_phy->sas_addr = &hisi_hba->sas_addr[0]; 548 sas_phy->frame_rcvd = &phy->frame_rcvd[0]; 549 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata; 550 sas_phy->lldd_phy = phy; 551 552 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work); 553 } 554 555 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) 556 { 557 struct sas_ha_struct *sas_ha = sas_phy->ha; 558 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 559 struct hisi_sas_phy *phy = sas_phy->lldd_phy; 560 struct asd_sas_port *sas_port = sas_phy->port; 561 struct hisi_sas_port *port = to_hisi_sas_port(sas_port); 562 unsigned long flags; 563 564 if (!sas_port) 565 return; 566 567 spin_lock_irqsave(&hisi_hba->lock, flags); 568 port->port_attached = 1; 569 port->id = phy->port_id; 570 phy->port = port; 571 sas_port->lldd_port = port; 572 spin_unlock_irqrestore(&hisi_hba->lock, flags); 573 } 574 575 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task, 576 struct hisi_sas_slot *slot) 577 { 578 if (task) { 579 unsigned long flags; 580 struct task_status_struct *ts; 581 582 ts = &task->task_status; 583 584 ts->resp = SAS_TASK_COMPLETE; 585 ts->stat = SAS_ABORTED_TASK; 586 spin_lock_irqsave(&task->task_state_lock, flags); 587 task->task_state_flags &= 588 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR); 589 task->task_state_flags |= SAS_TASK_STATE_DONE; 590 spin_unlock_irqrestore(&task->task_state_lock, flags); 591 } 592 593 hisi_sas_slot_task_free(hisi_hba, task, slot); 594 } 595 596 /* hisi_hba.lock should be locked */ 597 static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 598 struct domain_device *device) 599 { 600 struct hisi_sas_slot *slot, *slot2; 601 struct hisi_sas_device *sas_dev = device->lldd_dev; 602 603 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry) 604 hisi_sas_do_release_task(hisi_hba, slot->task, slot); 605 } 606 607 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba) 608 { 609 struct hisi_sas_device *sas_dev; 610 struct domain_device *device; 611 int i; 612 613 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 614 sas_dev = &hisi_hba->devices[i]; 615 device = sas_dev->sas_device; 616 617 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || 618 !device) 619 continue; 620 621 hisi_sas_release_task(hisi_hba, device); 622 } 623 } 624 625 static void hisi_sas_dev_gone(struct domain_device *device) 626 { 627 struct hisi_sas_device *sas_dev = device->lldd_dev; 628 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 629 struct device *dev = &hisi_hba->pdev->dev; 630 u64 dev_id = sas_dev->device_id; 631 632 dev_info(dev, "found dev[%lld:%x] is gone\n", 633 sas_dev->device_id, sas_dev->dev_type); 634 635 hisi_sas_internal_task_abort(hisi_hba, device, 636 HISI_SAS_INT_ABT_DEV, 0); 637 638 hisi_hba->hw->free_device(hisi_hba, sas_dev); 639 device->lldd_dev = NULL; 640 memset(sas_dev, 0, sizeof(*sas_dev)); 641 sas_dev->device_id = dev_id; 642 sas_dev->dev_type = SAS_PHY_UNUSED; 643 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 644 } 645 646 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) 647 { 648 return hisi_sas_task_exec(task, gfp_flags, 0, NULL); 649 } 650 651 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 652 void *funcdata) 653 { 654 struct sas_ha_struct *sas_ha = sas_phy->ha; 655 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 656 int phy_no = sas_phy->id; 657 658 switch (func) { 659 case PHY_FUNC_HARD_RESET: 660 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); 661 break; 662 663 case PHY_FUNC_LINK_RESET: 664 hisi_hba->hw->phy_disable(hisi_hba, phy_no); 665 msleep(100); 666 hisi_hba->hw->phy_enable(hisi_hba, phy_no); 667 break; 668 669 case PHY_FUNC_DISABLE: 670 hisi_hba->hw->phy_disable(hisi_hba, phy_no); 671 break; 672 673 case PHY_FUNC_SET_LINK_RATE: 674 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata); 675 break; 676 677 case PHY_FUNC_RELEASE_SPINUP_HOLD: 678 default: 679 return -EOPNOTSUPP; 680 } 681 return 0; 682 } 683 684 static void hisi_sas_task_done(struct sas_task *task) 685 { 686 if (!del_timer(&task->slow_task->timer)) 687 return; 688 complete(&task->slow_task->completion); 689 } 690 691 static void hisi_sas_tmf_timedout(unsigned long data) 692 { 693 struct sas_task *task = (struct sas_task *)data; 694 695 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 696 complete(&task->slow_task->completion); 697 } 698 699 #define TASK_TIMEOUT 20 700 #define TASK_RETRY 3 701 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device, 702 void *parameter, u32 para_len, 703 struct hisi_sas_tmf_task *tmf) 704 { 705 struct hisi_sas_device *sas_dev = device->lldd_dev; 706 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 707 struct device *dev = &hisi_hba->pdev->dev; 708 struct sas_task *task; 709 int res, retry; 710 711 for (retry = 0; retry < TASK_RETRY; retry++) { 712 task = sas_alloc_slow_task(GFP_KERNEL); 713 if (!task) 714 return -ENOMEM; 715 716 task->dev = device; 717 task->task_proto = device->tproto; 718 719 if (dev_is_sata(device)) { 720 task->ata_task.device_control_reg_update = 1; 721 memcpy(&task->ata_task.fis, parameter, para_len); 722 } else { 723 memcpy(&task->ssp_task, parameter, para_len); 724 } 725 task->task_done = hisi_sas_task_done; 726 727 task->slow_task->timer.data = (unsigned long) task; 728 task->slow_task->timer.function = hisi_sas_tmf_timedout; 729 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ; 730 add_timer(&task->slow_task->timer); 731 732 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf); 733 734 if (res) { 735 del_timer(&task->slow_task->timer); 736 dev_err(dev, "abort tmf: executing internal task failed: %d\n", 737 res); 738 goto ex_err; 739 } 740 741 wait_for_completion(&task->slow_task->completion); 742 res = TMF_RESP_FUNC_FAILED; 743 /* Even TMF timed out, return direct. */ 744 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 745 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 746 struct hisi_sas_slot *slot = task->lldd_task; 747 748 dev_err(dev, "abort tmf: TMF task timeout\n"); 749 if (slot) 750 slot->task = NULL; 751 752 goto ex_err; 753 } 754 } 755 756 if (task->task_status.resp == SAS_TASK_COMPLETE && 757 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 758 res = TMF_RESP_FUNC_COMPLETE; 759 break; 760 } 761 762 if (task->task_status.resp == SAS_TASK_COMPLETE && 763 task->task_status.stat == TMF_RESP_FUNC_SUCC) { 764 res = TMF_RESP_FUNC_SUCC; 765 break; 766 } 767 768 if (task->task_status.resp == SAS_TASK_COMPLETE && 769 task->task_status.stat == SAS_DATA_UNDERRUN) { 770 /* no error, but return the number of bytes of 771 * underrun 772 */ 773 dev_warn(dev, "abort tmf: task to dev %016llx " 774 "resp: 0x%x sts 0x%x underrun\n", 775 SAS_ADDR(device->sas_addr), 776 task->task_status.resp, 777 task->task_status.stat); 778 res = task->task_status.residual; 779 break; 780 } 781 782 if (task->task_status.resp == SAS_TASK_COMPLETE && 783 task->task_status.stat == SAS_DATA_OVERRUN) { 784 dev_warn(dev, "abort tmf: blocked task error\n"); 785 res = -EMSGSIZE; 786 break; 787 } 788 789 dev_warn(dev, "abort tmf: task to dev " 790 "%016llx resp: 0x%x status 0x%x\n", 791 SAS_ADDR(device->sas_addr), task->task_status.resp, 792 task->task_status.stat); 793 sas_free_task(task); 794 task = NULL; 795 } 796 ex_err: 797 if (retry == TASK_RETRY) 798 dev_warn(dev, "abort tmf: executing internal task failed!\n"); 799 sas_free_task(task); 800 return res; 801 } 802 803 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev, 804 bool reset, int pmp, u8 *fis) 805 { 806 struct ata_taskfile tf; 807 808 ata_tf_init(dev, &tf); 809 if (reset) 810 tf.ctl |= ATA_SRST; 811 else 812 tf.ctl &= ~ATA_SRST; 813 tf.command = ATA_CMD_DEV_RESET; 814 ata_tf_to_fis(&tf, pmp, 0, fis); 815 } 816 817 static int hisi_sas_softreset_ata_disk(struct domain_device *device) 818 { 819 u8 fis[20] = {0}; 820 struct ata_port *ap = device->sata_dev.ap; 821 struct ata_link *link; 822 int rc = TMF_RESP_FUNC_FAILED; 823 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 824 struct device *dev = &hisi_hba->pdev->dev; 825 int s = sizeof(struct host_to_dev_fis); 826 unsigned long flags; 827 828 ata_for_each_link(link, ap, EDGE) { 829 int pmp = sata_srst_pmp(link); 830 831 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 832 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL); 833 if (rc != TMF_RESP_FUNC_COMPLETE) 834 break; 835 } 836 837 if (rc == TMF_RESP_FUNC_COMPLETE) { 838 ata_for_each_link(link, ap, EDGE) { 839 int pmp = sata_srst_pmp(link); 840 841 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis); 842 rc = hisi_sas_exec_internal_tmf_task(device, fis, 843 s, NULL); 844 if (rc != TMF_RESP_FUNC_COMPLETE) 845 dev_err(dev, "ata disk de-reset failed\n"); 846 } 847 } else { 848 dev_err(dev, "ata disk reset failed\n"); 849 } 850 851 if (rc == TMF_RESP_FUNC_COMPLETE) { 852 spin_lock_irqsave(&hisi_hba->lock, flags); 853 hisi_sas_release_task(hisi_hba, device); 854 spin_unlock_irqrestore(&hisi_hba->lock, flags); 855 } 856 857 return rc; 858 } 859 860 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, 861 u8 *lun, struct hisi_sas_tmf_task *tmf) 862 { 863 struct sas_ssp_task ssp_task; 864 865 if (!(device->tproto & SAS_PROTOCOL_SSP)) 866 return TMF_RESP_FUNC_ESUPP; 867 868 memcpy(ssp_task.LUN, lun, 8); 869 870 return hisi_sas_exec_internal_tmf_task(device, &ssp_task, 871 sizeof(ssp_task), tmf); 872 } 873 874 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba) 875 { 876 int rc; 877 878 if (!hisi_hba->hw->soft_reset) 879 return -1; 880 881 if (!test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) { 882 struct device *dev = &hisi_hba->pdev->dev; 883 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 884 unsigned long flags; 885 886 dev_dbg(dev, "controller reset begins!\n"); 887 scsi_block_requests(hisi_hba->shost); 888 rc = hisi_hba->hw->soft_reset(hisi_hba); 889 if (rc) { 890 dev_warn(dev, "controller reset failed (%d)\n", rc); 891 goto out; 892 } 893 spin_lock_irqsave(&hisi_hba->lock, flags); 894 hisi_sas_release_tasks(hisi_hba); 895 spin_unlock_irqrestore(&hisi_hba->lock, flags); 896 897 sas_ha->notify_ha_event(sas_ha, HAE_RESET); 898 dev_dbg(dev, "controller reset successful!\n"); 899 } else 900 return -1; 901 902 out: 903 scsi_unblock_requests(hisi_hba->shost); 904 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags); 905 return rc; 906 } 907 908 static int hisi_sas_abort_task(struct sas_task *task) 909 { 910 struct scsi_lun lun; 911 struct hisi_sas_tmf_task tmf_task; 912 struct domain_device *device = task->dev; 913 struct hisi_sas_device *sas_dev = device->lldd_dev; 914 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); 915 struct device *dev = &hisi_hba->pdev->dev; 916 int rc = TMF_RESP_FUNC_FAILED; 917 unsigned long flags; 918 919 if (!sas_dev) { 920 dev_warn(dev, "Device has been removed\n"); 921 return TMF_RESP_FUNC_FAILED; 922 } 923 924 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 925 rc = TMF_RESP_FUNC_COMPLETE; 926 goto out; 927 } 928 929 sas_dev->dev_status = HISI_SAS_DEV_EH; 930 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 931 struct scsi_cmnd *cmnd = task->uldd_task; 932 struct hisi_sas_slot *slot = task->lldd_task; 933 u32 tag = slot->idx; 934 int rc2; 935 936 int_to_scsilun(cmnd->device->lun, &lun); 937 tmf_task.tmf = TMF_ABORT_TASK; 938 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); 939 940 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, 941 &tmf_task); 942 943 rc2 = hisi_sas_internal_task_abort(hisi_hba, device, 944 HISI_SAS_INT_ABT_CMD, tag); 945 /* 946 * If the TMF finds that the IO is not in the device and also 947 * the internal abort does not succeed, then it is safe to 948 * free the slot. 949 * Note: if the internal abort succeeds then the slot 950 * will have already been completed 951 */ 952 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) { 953 if (task->lldd_task) { 954 spin_lock_irqsave(&hisi_hba->lock, flags); 955 hisi_sas_do_release_task(hisi_hba, task, slot); 956 spin_unlock_irqrestore(&hisi_hba->lock, flags); 957 } 958 } 959 } else if (task->task_proto & SAS_PROTOCOL_SATA || 960 task->task_proto & SAS_PROTOCOL_STP) { 961 if (task->dev->dev_type == SAS_SATA_DEV) { 962 hisi_sas_internal_task_abort(hisi_hba, device, 963 HISI_SAS_INT_ABT_DEV, 0); 964 rc = hisi_sas_softreset_ata_disk(device); 965 } 966 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 967 /* SMP */ 968 struct hisi_sas_slot *slot = task->lldd_task; 969 u32 tag = slot->idx; 970 971 rc = hisi_sas_internal_task_abort(hisi_hba, device, 972 HISI_SAS_INT_ABT_CMD, tag); 973 if (rc == TMF_RESP_FUNC_FAILED) { 974 spin_lock_irqsave(&hisi_hba->lock, flags); 975 hisi_sas_do_release_task(hisi_hba, task, slot); 976 spin_unlock_irqrestore(&hisi_hba->lock, flags); 977 } 978 } 979 980 out: 981 if (rc != TMF_RESP_FUNC_COMPLETE) 982 dev_notice(dev, "abort task: rc=%d\n", rc); 983 return rc; 984 } 985 986 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) 987 { 988 struct hisi_sas_tmf_task tmf_task; 989 int rc = TMF_RESP_FUNC_FAILED; 990 991 tmf_task.tmf = TMF_ABORT_TASK_SET; 992 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 993 994 return rc; 995 } 996 997 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun) 998 { 999 int rc = TMF_RESP_FUNC_FAILED; 1000 struct hisi_sas_tmf_task tmf_task; 1001 1002 tmf_task.tmf = TMF_CLEAR_ACA; 1003 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1004 1005 return rc; 1006 } 1007 1008 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) 1009 { 1010 struct sas_phy *phy = sas_get_local_phy(device); 1011 int rc, reset_type = (device->dev_type == SAS_SATA_DEV || 1012 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; 1013 rc = sas_phy_reset(phy, reset_type); 1014 sas_put_local_phy(phy); 1015 msleep(2000); 1016 return rc; 1017 } 1018 1019 static int hisi_sas_I_T_nexus_reset(struct domain_device *device) 1020 { 1021 struct hisi_sas_device *sas_dev = device->lldd_dev; 1022 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1023 unsigned long flags; 1024 int rc = TMF_RESP_FUNC_FAILED; 1025 1026 if (sas_dev->dev_status != HISI_SAS_DEV_EH) 1027 return TMF_RESP_FUNC_FAILED; 1028 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 1029 1030 rc = hisi_sas_debug_I_T_nexus_reset(device); 1031 1032 if (rc == TMF_RESP_FUNC_COMPLETE) { 1033 spin_lock_irqsave(&hisi_hba->lock, flags); 1034 hisi_sas_release_task(hisi_hba, device); 1035 spin_unlock_irqrestore(&hisi_hba->lock, flags); 1036 } 1037 return rc; 1038 } 1039 1040 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) 1041 { 1042 struct hisi_sas_device *sas_dev = device->lldd_dev; 1043 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1044 struct device *dev = &hisi_hba->pdev->dev; 1045 unsigned long flags; 1046 int rc = TMF_RESP_FUNC_FAILED; 1047 1048 sas_dev->dev_status = HISI_SAS_DEV_EH; 1049 if (dev_is_sata(device)) { 1050 struct sas_phy *phy; 1051 1052 /* Clear internal IO and then hardreset */ 1053 rc = hisi_sas_internal_task_abort(hisi_hba, device, 1054 HISI_SAS_INT_ABT_DEV, 0); 1055 if (rc == TMF_RESP_FUNC_FAILED) 1056 goto out; 1057 1058 phy = sas_get_local_phy(device); 1059 1060 rc = sas_phy_reset(phy, 1); 1061 1062 if (rc == 0) { 1063 spin_lock_irqsave(&hisi_hba->lock, flags); 1064 hisi_sas_release_task(hisi_hba, device); 1065 spin_unlock_irqrestore(&hisi_hba->lock, flags); 1066 } 1067 sas_put_local_phy(phy); 1068 } else { 1069 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET }; 1070 1071 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 1072 if (rc == TMF_RESP_FUNC_COMPLETE) { 1073 spin_lock_irqsave(&hisi_hba->lock, flags); 1074 hisi_sas_release_task(hisi_hba, device); 1075 spin_unlock_irqrestore(&hisi_hba->lock, flags); 1076 } 1077 } 1078 out: 1079 if (rc != TMF_RESP_FUNC_COMPLETE) 1080 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n", 1081 sas_dev->device_id, rc); 1082 return rc; 1083 } 1084 1085 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha) 1086 { 1087 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1088 1089 return hisi_sas_controller_reset(hisi_hba); 1090 } 1091 1092 static int hisi_sas_query_task(struct sas_task *task) 1093 { 1094 struct scsi_lun lun; 1095 struct hisi_sas_tmf_task tmf_task; 1096 int rc = TMF_RESP_FUNC_FAILED; 1097 1098 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1099 struct scsi_cmnd *cmnd = task->uldd_task; 1100 struct domain_device *device = task->dev; 1101 struct hisi_sas_slot *slot = task->lldd_task; 1102 u32 tag = slot->idx; 1103 1104 int_to_scsilun(cmnd->device->lun, &lun); 1105 tmf_task.tmf = TMF_QUERY_TASK; 1106 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); 1107 1108 rc = hisi_sas_debug_issue_ssp_tmf(device, 1109 lun.scsi_lun, 1110 &tmf_task); 1111 switch (rc) { 1112 /* The task is still in Lun, release it then */ 1113 case TMF_RESP_FUNC_SUCC: 1114 /* The task is not in Lun or failed, reset the phy */ 1115 case TMF_RESP_FUNC_FAILED: 1116 case TMF_RESP_FUNC_COMPLETE: 1117 break; 1118 default: 1119 rc = TMF_RESP_FUNC_FAILED; 1120 break; 1121 } 1122 } 1123 return rc; 1124 } 1125 1126 static int 1127 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id, 1128 struct sas_task *task, int abort_flag, 1129 int task_tag) 1130 { 1131 struct domain_device *device = task->dev; 1132 struct hisi_sas_device *sas_dev = device->lldd_dev; 1133 struct device *dev = &hisi_hba->pdev->dev; 1134 struct hisi_sas_port *port; 1135 struct hisi_sas_slot *slot; 1136 struct asd_sas_port *sas_port = device->port; 1137 struct hisi_sas_cmd_hdr *cmd_hdr_base; 1138 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; 1139 unsigned long flags; 1140 1141 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))) 1142 return -EINVAL; 1143 1144 if (!device->port) 1145 return -1; 1146 1147 port = to_hisi_sas_port(sas_port); 1148 1149 /* simply get a slot and send abort command */ 1150 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx); 1151 if (rc) 1152 goto err_out; 1153 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id, 1154 &dlvry_queue, &dlvry_queue_slot); 1155 if (rc) 1156 goto err_out_tag; 1157 1158 slot = &hisi_hba->slot_info[slot_idx]; 1159 memset(slot, 0, sizeof(struct hisi_sas_slot)); 1160 1161 slot->idx = slot_idx; 1162 slot->n_elem = n_elem; 1163 slot->dlvry_queue = dlvry_queue; 1164 slot->dlvry_queue_slot = dlvry_queue_slot; 1165 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 1166 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 1167 slot->task = task; 1168 slot->port = port; 1169 task->lldd_task = slot; 1170 1171 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 1172 1173 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id, 1174 abort_flag, task_tag); 1175 if (rc) 1176 goto err_out_tag; 1177 1178 1179 list_add_tail(&slot->entry, &sas_dev->list); 1180 spin_lock_irqsave(&task->task_state_lock, flags); 1181 task->task_state_flags |= SAS_TASK_AT_INITIATOR; 1182 spin_unlock_irqrestore(&task->task_state_lock, flags); 1183 1184 hisi_hba->slot_prep = slot; 1185 1186 atomic64_inc(&sas_dev->running_req); 1187 1188 /* send abort command to our chip */ 1189 hisi_hba->hw->start_delivery(hisi_hba); 1190 1191 return 0; 1192 1193 err_out_tag: 1194 hisi_sas_slot_index_free(hisi_hba, slot_idx); 1195 err_out: 1196 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc); 1197 1198 return rc; 1199 } 1200 1201 /** 1202 * hisi_sas_internal_task_abort -- execute an internal 1203 * abort command for single IO command or a device 1204 * @hisi_hba: host controller struct 1205 * @device: domain device 1206 * @abort_flag: mode of operation, device or single IO 1207 * @tag: tag of IO to be aborted (only relevant to single 1208 * IO mode) 1209 */ 1210 static int 1211 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 1212 struct domain_device *device, 1213 int abort_flag, int tag) 1214 { 1215 struct sas_task *task; 1216 struct hisi_sas_device *sas_dev = device->lldd_dev; 1217 struct device *dev = &hisi_hba->pdev->dev; 1218 int res; 1219 unsigned long flags; 1220 1221 if (!hisi_hba->hw->prep_abort) 1222 return -EOPNOTSUPP; 1223 1224 task = sas_alloc_slow_task(GFP_KERNEL); 1225 if (!task) 1226 return -ENOMEM; 1227 1228 task->dev = device; 1229 task->task_proto = device->tproto; 1230 task->task_done = hisi_sas_task_done; 1231 task->slow_task->timer.data = (unsigned long)task; 1232 task->slow_task->timer.function = hisi_sas_tmf_timedout; 1233 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110); 1234 add_timer(&task->slow_task->timer); 1235 1236 /* Lock as we are alloc'ing a slot, which cannot be interrupted */ 1237 spin_lock_irqsave(&hisi_hba->lock, flags); 1238 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id, 1239 task, abort_flag, tag); 1240 spin_unlock_irqrestore(&hisi_hba->lock, flags); 1241 if (res) { 1242 del_timer(&task->slow_task->timer); 1243 dev_err(dev, "internal task abort: executing internal task failed: %d\n", 1244 res); 1245 goto exit; 1246 } 1247 wait_for_completion(&task->slow_task->completion); 1248 res = TMF_RESP_FUNC_FAILED; 1249 1250 if (task->task_status.resp == SAS_TASK_COMPLETE && 1251 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 1252 res = TMF_RESP_FUNC_COMPLETE; 1253 goto exit; 1254 } 1255 1256 if (task->task_status.resp == SAS_TASK_COMPLETE && 1257 task->task_status.stat == TMF_RESP_FUNC_SUCC) { 1258 res = TMF_RESP_FUNC_SUCC; 1259 goto exit; 1260 } 1261 1262 /* Internal abort timed out */ 1263 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 1264 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 1265 dev_err(dev, "internal task abort: timeout.\n"); 1266 } 1267 } 1268 1269 exit: 1270 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p " 1271 "resp: 0x%x sts 0x%x\n", 1272 SAS_ADDR(device->sas_addr), 1273 task, 1274 task->task_status.resp, /* 0 is complete, -1 is undelivered */ 1275 task->task_status.stat); 1276 sas_free_task(task); 1277 1278 return res; 1279 } 1280 1281 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) 1282 { 1283 hisi_sas_port_notify_formed(sas_phy); 1284 } 1285 1286 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) 1287 { 1288 phy->phy_attached = 0; 1289 phy->phy_type = 0; 1290 phy->port = NULL; 1291 } 1292 1293 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy) 1294 { 1295 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1296 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1297 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1298 1299 if (rdy) { 1300 /* Phy down but ready */ 1301 hisi_sas_bytes_dmaed(hisi_hba, phy_no); 1302 hisi_sas_port_notify_formed(sas_phy); 1303 } else { 1304 struct hisi_sas_port *port = phy->port; 1305 1306 /* Phy down and not ready */ 1307 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL); 1308 sas_phy_disconnected(sas_phy); 1309 1310 if (port) { 1311 if (phy->phy_type & PORT_TYPE_SAS) { 1312 int port_id = port->id; 1313 1314 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, 1315 port_id)) 1316 port->port_attached = 0; 1317 } else if (phy->phy_type & PORT_TYPE_SATA) 1318 port->port_attached = 0; 1319 } 1320 hisi_sas_phy_disconnected(phy); 1321 } 1322 } 1323 EXPORT_SYMBOL_GPL(hisi_sas_phy_down); 1324 1325 void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state, 1326 u32 state) 1327 { 1328 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1329 int phy_no; 1330 1331 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1332 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1333 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1334 struct asd_sas_port *sas_port = sas_phy->port; 1335 struct domain_device *dev; 1336 1337 if (sas_phy->enabled) { 1338 /* Report PHY state change to libsas */ 1339 if (state & (1 << phy_no)) 1340 continue; 1341 1342 if (old_state & (1 << phy_no)) 1343 /* PHY down but was up before */ 1344 hisi_sas_phy_down(hisi_hba, phy_no, 0); 1345 } 1346 if (!sas_port) 1347 continue; 1348 dev = sas_port->port_dev; 1349 1350 if (DEV_IS_EXPANDER(dev->dev_type)) 1351 sas_ha->notify_phy_event(sas_phy, PORTE_BROADCAST_RCVD); 1352 } 1353 } 1354 EXPORT_SYMBOL_GPL(hisi_sas_rescan_topology); 1355 1356 static struct scsi_transport_template *hisi_sas_stt; 1357 1358 static struct scsi_host_template hisi_sas_sht = { 1359 .module = THIS_MODULE, 1360 .name = DRV_NAME, 1361 .queuecommand = sas_queuecommand, 1362 .target_alloc = sas_target_alloc, 1363 .slave_configure = hisi_sas_slave_configure, 1364 .scan_finished = hisi_sas_scan_finished, 1365 .scan_start = hisi_sas_scan_start, 1366 .change_queue_depth = sas_change_queue_depth, 1367 .bios_param = sas_bios_param, 1368 .can_queue = 1, 1369 .this_id = -1, 1370 .sg_tablesize = SG_ALL, 1371 .max_sectors = SCSI_DEFAULT_MAX_SECTORS, 1372 .use_clustering = ENABLE_CLUSTERING, 1373 .eh_device_reset_handler = sas_eh_device_reset_handler, 1374 .eh_bus_reset_handler = sas_eh_bus_reset_handler, 1375 .target_destroy = sas_target_destroy, 1376 .ioctl = sas_ioctl, 1377 }; 1378 1379 static struct sas_domain_function_template hisi_sas_transport_ops = { 1380 .lldd_dev_found = hisi_sas_dev_found, 1381 .lldd_dev_gone = hisi_sas_dev_gone, 1382 .lldd_execute_task = hisi_sas_queue_command, 1383 .lldd_control_phy = hisi_sas_control_phy, 1384 .lldd_abort_task = hisi_sas_abort_task, 1385 .lldd_abort_task_set = hisi_sas_abort_task_set, 1386 .lldd_clear_aca = hisi_sas_clear_aca, 1387 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, 1388 .lldd_lu_reset = hisi_sas_lu_reset, 1389 .lldd_query_task = hisi_sas_query_task, 1390 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha, 1391 .lldd_port_formed = hisi_sas_port_formed, 1392 }; 1393 1394 void hisi_sas_init_mem(struct hisi_hba *hisi_hba) 1395 { 1396 int i, s, max_command_entries = hisi_hba->hw->max_command_entries; 1397 1398 for (i = 0; i < hisi_hba->queue_count; i++) { 1399 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 1400 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 1401 1402 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 1403 memset(hisi_hba->cmd_hdr[i], 0, s); 1404 dq->wr_point = 0; 1405 1406 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 1407 memset(hisi_hba->complete_hdr[i], 0, s); 1408 cq->rd_point = 0; 1409 } 1410 1411 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy; 1412 memset(hisi_hba->initial_fis, 0, s); 1413 1414 s = max_command_entries * sizeof(struct hisi_sas_iost); 1415 memset(hisi_hba->iost, 0, s); 1416 1417 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 1418 memset(hisi_hba->breakpoint, 0, s); 1419 1420 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; 1421 memset(hisi_hba->sata_breakpoint, 0, s); 1422 } 1423 EXPORT_SYMBOL_GPL(hisi_sas_init_mem); 1424 1425 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost) 1426 { 1427 struct platform_device *pdev = hisi_hba->pdev; 1428 struct device *dev = &pdev->dev; 1429 int i, s, max_command_entries = hisi_hba->hw->max_command_entries; 1430 1431 spin_lock_init(&hisi_hba->lock); 1432 for (i = 0; i < hisi_hba->n_phy; i++) { 1433 hisi_sas_phy_init(hisi_hba, i); 1434 hisi_hba->port[i].port_attached = 0; 1435 hisi_hba->port[i].id = -1; 1436 } 1437 1438 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1439 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; 1440 hisi_hba->devices[i].device_id = i; 1441 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL; 1442 } 1443 1444 for (i = 0; i < hisi_hba->queue_count; i++) { 1445 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 1446 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 1447 1448 /* Completion queue structure */ 1449 cq->id = i; 1450 cq->hisi_hba = hisi_hba; 1451 1452 /* Delivery queue structure */ 1453 dq->id = i; 1454 dq->hisi_hba = hisi_hba; 1455 1456 /* Delivery queue */ 1457 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 1458 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s, 1459 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL); 1460 if (!hisi_hba->cmd_hdr[i]) 1461 goto err_out; 1462 1463 /* Completion queue */ 1464 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 1465 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s, 1466 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL); 1467 if (!hisi_hba->complete_hdr[i]) 1468 goto err_out; 1469 } 1470 1471 s = HISI_SAS_STATUS_BUF_SZ; 1472 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer", 1473 dev, s, 16, 0); 1474 if (!hisi_hba->status_buffer_pool) 1475 goto err_out; 1476 1477 s = HISI_SAS_COMMAND_TABLE_SZ; 1478 hisi_hba->command_table_pool = dma_pool_create("command_table", 1479 dev, s, 16, 0); 1480 if (!hisi_hba->command_table_pool) 1481 goto err_out; 1482 1483 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 1484 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma, 1485 GFP_KERNEL); 1486 if (!hisi_hba->itct) 1487 goto err_out; 1488 1489 memset(hisi_hba->itct, 0, s); 1490 1491 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, 1492 sizeof(struct hisi_sas_slot), 1493 GFP_KERNEL); 1494 if (!hisi_hba->slot_info) 1495 goto err_out; 1496 1497 s = max_command_entries * sizeof(struct hisi_sas_iost); 1498 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma, 1499 GFP_KERNEL); 1500 if (!hisi_hba->iost) 1501 goto err_out; 1502 1503 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 1504 hisi_hba->breakpoint = dma_alloc_coherent(dev, s, 1505 &hisi_hba->breakpoint_dma, GFP_KERNEL); 1506 if (!hisi_hba->breakpoint) 1507 goto err_out; 1508 1509 hisi_hba->slot_index_count = max_command_entries; 1510 s = hisi_hba->slot_index_count / BITS_PER_BYTE; 1511 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL); 1512 if (!hisi_hba->slot_index_tags) 1513 goto err_out; 1514 1515 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev, 1516 sizeof(struct hisi_sas_sge_page), 16, 0); 1517 if (!hisi_hba->sge_page_pool) 1518 goto err_out; 1519 1520 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 1521 hisi_hba->initial_fis = dma_alloc_coherent(dev, s, 1522 &hisi_hba->initial_fis_dma, GFP_KERNEL); 1523 if (!hisi_hba->initial_fis) 1524 goto err_out; 1525 1526 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; 1527 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s, 1528 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL); 1529 if (!hisi_hba->sata_breakpoint) 1530 goto err_out; 1531 hisi_sas_init_mem(hisi_hba); 1532 1533 hisi_sas_slot_index_init(hisi_hba); 1534 1535 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); 1536 if (!hisi_hba->wq) { 1537 dev_err(dev, "sas_alloc: failed to create workqueue\n"); 1538 goto err_out; 1539 } 1540 1541 return 0; 1542 err_out: 1543 return -ENOMEM; 1544 } 1545 1546 static void hisi_sas_free(struct hisi_hba *hisi_hba) 1547 { 1548 struct device *dev = &hisi_hba->pdev->dev; 1549 int i, s, max_command_entries = hisi_hba->hw->max_command_entries; 1550 1551 for (i = 0; i < hisi_hba->queue_count; i++) { 1552 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 1553 if (hisi_hba->cmd_hdr[i]) 1554 dma_free_coherent(dev, s, 1555 hisi_hba->cmd_hdr[i], 1556 hisi_hba->cmd_hdr_dma[i]); 1557 1558 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 1559 if (hisi_hba->complete_hdr[i]) 1560 dma_free_coherent(dev, s, 1561 hisi_hba->complete_hdr[i], 1562 hisi_hba->complete_hdr_dma[i]); 1563 } 1564 1565 dma_pool_destroy(hisi_hba->status_buffer_pool); 1566 dma_pool_destroy(hisi_hba->command_table_pool); 1567 dma_pool_destroy(hisi_hba->sge_page_pool); 1568 1569 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 1570 if (hisi_hba->itct) 1571 dma_free_coherent(dev, s, 1572 hisi_hba->itct, hisi_hba->itct_dma); 1573 1574 s = max_command_entries * sizeof(struct hisi_sas_iost); 1575 if (hisi_hba->iost) 1576 dma_free_coherent(dev, s, 1577 hisi_hba->iost, hisi_hba->iost_dma); 1578 1579 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 1580 if (hisi_hba->breakpoint) 1581 dma_free_coherent(dev, s, 1582 hisi_hba->breakpoint, 1583 hisi_hba->breakpoint_dma); 1584 1585 1586 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 1587 if (hisi_hba->initial_fis) 1588 dma_free_coherent(dev, s, 1589 hisi_hba->initial_fis, 1590 hisi_hba->initial_fis_dma); 1591 1592 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; 1593 if (hisi_hba->sata_breakpoint) 1594 dma_free_coherent(dev, s, 1595 hisi_hba->sata_breakpoint, 1596 hisi_hba->sata_breakpoint_dma); 1597 1598 if (hisi_hba->wq) 1599 destroy_workqueue(hisi_hba->wq); 1600 } 1601 1602 static void hisi_sas_rst_work_handler(struct work_struct *work) 1603 { 1604 struct hisi_hba *hisi_hba = 1605 container_of(work, struct hisi_hba, rst_work); 1606 1607 hisi_sas_controller_reset(hisi_hba); 1608 } 1609 1610 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, 1611 const struct hisi_sas_hw *hw) 1612 { 1613 struct resource *res; 1614 struct Scsi_Host *shost; 1615 struct hisi_hba *hisi_hba; 1616 struct device *dev = &pdev->dev; 1617 struct device_node *np = pdev->dev.of_node; 1618 struct clk *refclk; 1619 1620 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba)); 1621 if (!shost) { 1622 dev_err(dev, "scsi host alloc failed\n"); 1623 return NULL; 1624 } 1625 hisi_hba = shost_priv(shost); 1626 1627 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler); 1628 hisi_hba->hw = hw; 1629 hisi_hba->pdev = pdev; 1630 hisi_hba->shost = shost; 1631 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; 1632 1633 init_timer(&hisi_hba->timer); 1634 1635 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, 1636 SAS_ADDR_SIZE)) 1637 goto err_out; 1638 1639 if (np) { 1640 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, 1641 "hisilicon,sas-syscon"); 1642 if (IS_ERR(hisi_hba->ctrl)) 1643 goto err_out; 1644 1645 if (device_property_read_u32(dev, "ctrl-reset-reg", 1646 &hisi_hba->ctrl_reset_reg)) 1647 goto err_out; 1648 1649 if (device_property_read_u32(dev, "ctrl-reset-sts-reg", 1650 &hisi_hba->ctrl_reset_sts_reg)) 1651 goto err_out; 1652 1653 if (device_property_read_u32(dev, "ctrl-clock-ena-reg", 1654 &hisi_hba->ctrl_clock_ena_reg)) 1655 goto err_out; 1656 } 1657 1658 refclk = devm_clk_get(&pdev->dev, NULL); 1659 if (IS_ERR(refclk)) 1660 dev_dbg(dev, "no ref clk property\n"); 1661 else 1662 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000; 1663 1664 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) 1665 goto err_out; 1666 1667 if (device_property_read_u32(dev, "queue-count", 1668 &hisi_hba->queue_count)) 1669 goto err_out; 1670 1671 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) && 1672 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) { 1673 dev_err(dev, "No usable DMA addressing method\n"); 1674 goto err_out; 1675 } 1676 1677 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1678 hisi_hba->regs = devm_ioremap_resource(dev, res); 1679 if (IS_ERR(hisi_hba->regs)) 1680 goto err_out; 1681 1682 if (hisi_sas_alloc(hisi_hba, shost)) { 1683 hisi_sas_free(hisi_hba); 1684 goto err_out; 1685 } 1686 1687 return shost; 1688 err_out: 1689 kfree(shost); 1690 dev_err(dev, "shost alloc failed\n"); 1691 return NULL; 1692 } 1693 1694 static void hisi_sas_init_add(struct hisi_hba *hisi_hba) 1695 { 1696 int i; 1697 1698 for (i = 0; i < hisi_hba->n_phy; i++) 1699 memcpy(&hisi_hba->phy[i].dev_sas_addr, 1700 hisi_hba->sas_addr, 1701 SAS_ADDR_SIZE); 1702 } 1703 1704 int hisi_sas_probe(struct platform_device *pdev, 1705 const struct hisi_sas_hw *hw) 1706 { 1707 struct Scsi_Host *shost; 1708 struct hisi_hba *hisi_hba; 1709 struct device *dev = &pdev->dev; 1710 struct asd_sas_phy **arr_phy; 1711 struct asd_sas_port **arr_port; 1712 struct sas_ha_struct *sha; 1713 int rc, phy_nr, port_nr, i; 1714 1715 shost = hisi_sas_shost_alloc(pdev, hw); 1716 if (!shost) 1717 return -ENOMEM; 1718 1719 sha = SHOST_TO_SAS_HA(shost); 1720 hisi_hba = shost_priv(shost); 1721 platform_set_drvdata(pdev, sha); 1722 1723 phy_nr = port_nr = hisi_hba->n_phy; 1724 1725 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); 1726 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); 1727 if (!arr_phy || !arr_port) { 1728 rc = -ENOMEM; 1729 goto err_out_ha; 1730 } 1731 1732 sha->sas_phy = arr_phy; 1733 sha->sas_port = arr_port; 1734 sha->lldd_ha = hisi_hba; 1735 1736 shost->transportt = hisi_sas_stt; 1737 shost->max_id = HISI_SAS_MAX_DEVICES; 1738 shost->max_lun = ~0; 1739 shost->max_channel = 1; 1740 shost->max_cmd_len = 16; 1741 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT); 1742 shost->can_queue = hisi_hba->hw->max_command_entries; 1743 shost->cmd_per_lun = hisi_hba->hw->max_command_entries; 1744 1745 sha->sas_ha_name = DRV_NAME; 1746 sha->dev = &hisi_hba->pdev->dev; 1747 sha->lldd_module = THIS_MODULE; 1748 sha->sas_addr = &hisi_hba->sas_addr[0]; 1749 sha->num_phys = hisi_hba->n_phy; 1750 sha->core.shost = hisi_hba->shost; 1751 1752 for (i = 0; i < hisi_hba->n_phy; i++) { 1753 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; 1754 sha->sas_port[i] = &hisi_hba->port[i].sas_port; 1755 } 1756 1757 hisi_sas_init_add(hisi_hba); 1758 1759 rc = scsi_add_host(shost, &pdev->dev); 1760 if (rc) 1761 goto err_out_ha; 1762 1763 rc = sas_register_ha(sha); 1764 if (rc) 1765 goto err_out_register_ha; 1766 1767 rc = hisi_hba->hw->hw_init(hisi_hba); 1768 if (rc) 1769 goto err_out_register_ha; 1770 1771 scsi_scan_host(shost); 1772 1773 return 0; 1774 1775 err_out_register_ha: 1776 scsi_remove_host(shost); 1777 err_out_ha: 1778 hisi_sas_free(hisi_hba); 1779 kfree(shost); 1780 return rc; 1781 } 1782 EXPORT_SYMBOL_GPL(hisi_sas_probe); 1783 1784 int hisi_sas_remove(struct platform_device *pdev) 1785 { 1786 struct sas_ha_struct *sha = platform_get_drvdata(pdev); 1787 struct hisi_hba *hisi_hba = sha->lldd_ha; 1788 struct Scsi_Host *shost = sha->core.shost; 1789 1790 sas_unregister_ha(sha); 1791 sas_remove_host(sha->core.shost); 1792 1793 hisi_sas_free(hisi_hba); 1794 kfree(shost); 1795 return 0; 1796 } 1797 EXPORT_SYMBOL_GPL(hisi_sas_remove); 1798 1799 static __init int hisi_sas_init(void) 1800 { 1801 pr_info("hisi_sas: driver version %s\n", DRV_VERSION); 1802 1803 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); 1804 if (!hisi_sas_stt) 1805 return -ENOMEM; 1806 1807 return 0; 1808 } 1809 1810 static __exit void hisi_sas_exit(void) 1811 { 1812 sas_release_transport(hisi_sas_stt); 1813 } 1814 1815 module_init(hisi_sas_init); 1816 module_exit(hisi_sas_exit); 1817 1818 MODULE_VERSION(DRV_VERSION); 1819 MODULE_LICENSE("GPL"); 1820 MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); 1821 MODULE_DESCRIPTION("HISILICON SAS controller driver"); 1822 MODULE_ALIAS("platform:" DRV_NAME); 1823