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