1 /* 2 * Copyright (c) 2015 Linaro Ltd. 3 * Copyright (c) 2015 Hisilicon Limited. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 */ 11 12 #include "hisi_sas.h" 13 #define DRV_NAME "hisi_sas" 14 15 #define DEV_IS_GONE(dev) \ 16 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED)) 17 18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, 19 u8 *lun, struct hisi_sas_tmf_task *tmf); 20 static int 21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 22 struct domain_device *device, 23 int abort_flag, int tag); 24 25 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) 26 { 27 return device->port->ha->lldd_ha; 28 } 29 30 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) 31 { 32 void *bitmap = hisi_hba->slot_index_tags; 33 34 clear_bit(slot_idx, bitmap); 35 } 36 37 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) 38 { 39 hisi_sas_slot_index_clear(hisi_hba, slot_idx); 40 } 41 42 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) 43 { 44 void *bitmap = hisi_hba->slot_index_tags; 45 46 set_bit(slot_idx, bitmap); 47 } 48 49 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx) 50 { 51 unsigned int index; 52 void *bitmap = hisi_hba->slot_index_tags; 53 54 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count); 55 if (index >= hisi_hba->slot_index_count) 56 return -SAS_QUEUE_FULL; 57 hisi_sas_slot_index_set(hisi_hba, index); 58 *slot_idx = index; 59 return 0; 60 } 61 62 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba) 63 { 64 int i; 65 66 for (i = 0; i < hisi_hba->slot_index_count; ++i) 67 hisi_sas_slot_index_clear(hisi_hba, i); 68 } 69 70 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, 71 struct hisi_sas_slot *slot) 72 { 73 struct device *dev = &hisi_hba->pdev->dev; 74 75 if (!slot->task) 76 return; 77 78 if (!sas_protocol_ata(task->task_proto)) 79 if (slot->n_elem) 80 dma_unmap_sg(dev, task->scatter, slot->n_elem, 81 task->data_dir); 82 83 if (slot->command_table) 84 dma_pool_free(hisi_hba->command_table_pool, 85 slot->command_table, slot->command_table_dma); 86 87 if (slot->status_buffer) 88 dma_pool_free(hisi_hba->status_buffer_pool, 89 slot->status_buffer, slot->status_buffer_dma); 90 91 if (slot->sge_page) 92 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page, 93 slot->sge_page_dma); 94 95 list_del_init(&slot->entry); 96 task->lldd_task = NULL; 97 slot->task = NULL; 98 slot->port = NULL; 99 hisi_sas_slot_index_free(hisi_hba, slot->idx); 100 /* slot memory is fully zeroed when it is reused */ 101 } 102 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); 103 104 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba, 105 struct hisi_sas_slot *slot) 106 { 107 return hisi_hba->hw->prep_smp(hisi_hba, slot); 108 } 109 110 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba, 111 struct hisi_sas_slot *slot, int is_tmf, 112 struct hisi_sas_tmf_task *tmf) 113 { 114 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf); 115 } 116 117 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba, 118 struct hisi_sas_slot *slot) 119 { 120 return hisi_hba->hw->prep_stp(hisi_hba, slot); 121 } 122 123 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba, 124 struct hisi_sas_slot *slot, 125 int device_id, int abort_flag, int tag_to_abort) 126 { 127 return hisi_hba->hw->prep_abort(hisi_hba, slot, 128 device_id, abort_flag, tag_to_abort); 129 } 130 131 /* 132 * This function will issue an abort TMF regardless of whether the 133 * task is in the sdev or not. Then it will do the task complete 134 * cleanup and callbacks. 135 */ 136 static void hisi_sas_slot_abort(struct work_struct *work) 137 { 138 struct hisi_sas_slot *abort_slot = 139 container_of(work, struct hisi_sas_slot, abort_slot); 140 struct sas_task *task = abort_slot->task; 141 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); 142 struct scsi_cmnd *cmnd = task->uldd_task; 143 struct hisi_sas_tmf_task tmf_task; 144 struct domain_device *device = task->dev; 145 struct hisi_sas_device *sas_dev = device->lldd_dev; 146 struct scsi_lun lun; 147 struct device *dev = &hisi_hba->pdev->dev; 148 int tag = abort_slot->idx; 149 150 if (!(task->task_proto & SAS_PROTOCOL_SSP)) { 151 dev_err(dev, "cannot abort slot for non-ssp task\n"); 152 goto out; 153 } 154 155 int_to_scsilun(cmnd->device->lun, &lun); 156 tmf_task.tmf = TMF_ABORT_TASK; 157 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); 158 159 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task); 160 out: 161 /* Do cleanup for this task */ 162 hisi_sas_slot_task_free(hisi_hba, task, abort_slot); 163 if (task->task_done) 164 task->task_done(task); 165 if (sas_dev && sas_dev->running_req) 166 sas_dev->running_req--; 167 } 168 169 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba, 170 int is_tmf, struct hisi_sas_tmf_task *tmf, 171 int *pass) 172 { 173 struct domain_device *device = task->dev; 174 struct hisi_sas_device *sas_dev = device->lldd_dev; 175 struct hisi_sas_port *port; 176 struct hisi_sas_slot *slot; 177 struct hisi_sas_cmd_hdr *cmd_hdr_base; 178 struct device *dev = &hisi_hba->pdev->dev; 179 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; 180 181 if (!device->port) { 182 struct task_status_struct *ts = &task->task_status; 183 184 ts->resp = SAS_TASK_UNDELIVERED; 185 ts->stat = SAS_PHY_DOWN; 186 /* 187 * libsas will use dev->port, should 188 * not call task_done for sata 189 */ 190 if (device->dev_type != SAS_SATA_DEV) 191 task->task_done(task); 192 return 0; 193 } 194 195 if (DEV_IS_GONE(sas_dev)) { 196 if (sas_dev) 197 dev_info(dev, "task prep: device %llu not ready\n", 198 sas_dev->device_id); 199 else 200 dev_info(dev, "task prep: device %016llx not ready\n", 201 SAS_ADDR(device->sas_addr)); 202 203 rc = SAS_PHY_DOWN; 204 return rc; 205 } 206 port = device->port->lldd_port; 207 if (port && !port->port_attached) { 208 dev_info(dev, "task prep: %s port%d not attach device\n", 209 (sas_protocol_ata(task->task_proto)) ? 210 "SATA/STP" : "SAS", 211 device->port->id); 212 213 return SAS_PHY_DOWN; 214 } 215 216 if (!sas_protocol_ata(task->task_proto)) { 217 if (task->num_scatter) { 218 n_elem = dma_map_sg(dev, task->scatter, 219 task->num_scatter, task->data_dir); 220 if (!n_elem) { 221 rc = -ENOMEM; 222 goto prep_out; 223 } 224 } 225 } else 226 n_elem = task->num_scatter; 227 228 if (hisi_hba->hw->slot_index_alloc) 229 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx, 230 device); 231 else 232 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx); 233 if (rc) 234 goto err_out; 235 rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue, 236 &dlvry_queue_slot); 237 if (rc) 238 goto err_out_tag; 239 240 slot = &hisi_hba->slot_info[slot_idx]; 241 memset(slot, 0, sizeof(struct hisi_sas_slot)); 242 243 slot->idx = slot_idx; 244 slot->n_elem = n_elem; 245 slot->dlvry_queue = dlvry_queue; 246 slot->dlvry_queue_slot = dlvry_queue_slot; 247 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 248 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 249 slot->task = task; 250 slot->port = port; 251 task->lldd_task = slot; 252 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort); 253 254 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool, 255 GFP_ATOMIC, 256 &slot->status_buffer_dma); 257 if (!slot->status_buffer) { 258 rc = -ENOMEM; 259 goto err_out_slot_buf; 260 } 261 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ); 262 263 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool, 264 GFP_ATOMIC, 265 &slot->command_table_dma); 266 if (!slot->command_table) { 267 rc = -ENOMEM; 268 goto err_out_status_buf; 269 } 270 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ); 271 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 272 273 switch (task->task_proto) { 274 case SAS_PROTOCOL_SMP: 275 rc = hisi_sas_task_prep_smp(hisi_hba, slot); 276 break; 277 case SAS_PROTOCOL_SSP: 278 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf); 279 break; 280 case SAS_PROTOCOL_SATA: 281 case SAS_PROTOCOL_STP: 282 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: 283 rc = hisi_sas_task_prep_ata(hisi_hba, slot); 284 break; 285 default: 286 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n", 287 task->task_proto); 288 rc = -EINVAL; 289 break; 290 } 291 292 if (rc) { 293 dev_err(dev, "task prep: rc = 0x%x\n", rc); 294 if (slot->sge_page) 295 goto err_out_sge; 296 goto err_out_command_table; 297 } 298 299 list_add_tail(&slot->entry, &port->list); 300 spin_lock(&task->task_state_lock); 301 task->task_state_flags |= SAS_TASK_AT_INITIATOR; 302 spin_unlock(&task->task_state_lock); 303 304 hisi_hba->slot_prep = slot; 305 306 sas_dev->running_req++; 307 ++(*pass); 308 309 return 0; 310 311 err_out_sge: 312 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page, 313 slot->sge_page_dma); 314 err_out_command_table: 315 dma_pool_free(hisi_hba->command_table_pool, slot->command_table, 316 slot->command_table_dma); 317 err_out_status_buf: 318 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer, 319 slot->status_buffer_dma); 320 err_out_slot_buf: 321 /* Nothing to be done */ 322 err_out_tag: 323 hisi_sas_slot_index_free(hisi_hba, slot_idx); 324 err_out: 325 dev_err(dev, "task prep: failed[%d]!\n", rc); 326 if (!sas_protocol_ata(task->task_proto)) 327 if (n_elem) 328 dma_unmap_sg(dev, task->scatter, n_elem, 329 task->data_dir); 330 prep_out: 331 return rc; 332 } 333 334 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags, 335 int is_tmf, struct hisi_sas_tmf_task *tmf) 336 { 337 u32 rc; 338 u32 pass = 0; 339 unsigned long flags; 340 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); 341 struct device *dev = &hisi_hba->pdev->dev; 342 343 /* protect task_prep and start_delivery sequence */ 344 spin_lock_irqsave(&hisi_hba->lock, flags); 345 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass); 346 if (rc) 347 dev_err(dev, "task exec: failed[%d]!\n", rc); 348 349 if (likely(pass)) 350 hisi_hba->hw->start_delivery(hisi_hba); 351 spin_unlock_irqrestore(&hisi_hba->lock, flags); 352 353 return rc; 354 } 355 356 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no) 357 { 358 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 359 struct asd_sas_phy *sas_phy = &phy->sas_phy; 360 struct sas_ha_struct *sas_ha; 361 362 if (!phy->phy_attached) 363 return; 364 365 sas_ha = &hisi_hba->sha; 366 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE); 367 368 if (sas_phy->phy) { 369 struct sas_phy *sphy = sas_phy->phy; 370 371 sphy->negotiated_linkrate = sas_phy->linkrate; 372 sphy->minimum_linkrate = phy->minimum_linkrate; 373 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; 374 sphy->maximum_linkrate = phy->maximum_linkrate; 375 } 376 377 if (phy->phy_type & PORT_TYPE_SAS) { 378 struct sas_identify_frame *id; 379 380 id = (struct sas_identify_frame *)phy->frame_rcvd; 381 id->dev_type = phy->identify.device_type; 382 id->initiator_bits = SAS_PROTOCOL_ALL; 383 id->target_bits = phy->identify.target_port_protocols; 384 } else if (phy->phy_type & PORT_TYPE_SATA) { 385 /*Nothing*/ 386 } 387 388 sas_phy->frame_rcvd_size = phy->frame_rcvd_size; 389 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED); 390 } 391 392 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) 393 { 394 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 395 struct hisi_sas_device *sas_dev = NULL; 396 int i; 397 398 spin_lock(&hisi_hba->lock); 399 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 400 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) { 401 hisi_hba->devices[i].device_id = i; 402 sas_dev = &hisi_hba->devices[i]; 403 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 404 sas_dev->dev_type = device->dev_type; 405 sas_dev->hisi_hba = hisi_hba; 406 sas_dev->sas_device = device; 407 break; 408 } 409 } 410 spin_unlock(&hisi_hba->lock); 411 412 return sas_dev; 413 } 414 415 static int hisi_sas_dev_found(struct domain_device *device) 416 { 417 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 418 struct domain_device *parent_dev = device->parent; 419 struct hisi_sas_device *sas_dev; 420 struct device *dev = &hisi_hba->pdev->dev; 421 422 if (hisi_hba->hw->alloc_dev) 423 sas_dev = hisi_hba->hw->alloc_dev(device); 424 else 425 sas_dev = hisi_sas_alloc_dev(device); 426 if (!sas_dev) { 427 dev_err(dev, "fail alloc dev: max support %d devices\n", 428 HISI_SAS_MAX_DEVICES); 429 return -EINVAL; 430 } 431 432 device->lldd_dev = sas_dev; 433 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 434 435 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) { 436 int phy_no; 437 u8 phy_num = parent_dev->ex_dev.num_phys; 438 struct ex_phy *phy; 439 440 for (phy_no = 0; phy_no < phy_num; phy_no++) { 441 phy = &parent_dev->ex_dev.ex_phy[phy_no]; 442 if (SAS_ADDR(phy->attached_sas_addr) == 443 SAS_ADDR(device->sas_addr)) { 444 sas_dev->attached_phy = phy_no; 445 break; 446 } 447 } 448 449 if (phy_no == phy_num) { 450 dev_info(dev, "dev found: no attached " 451 "dev:%016llx at ex:%016llx\n", 452 SAS_ADDR(device->sas_addr), 453 SAS_ADDR(parent_dev->sas_addr)); 454 return -EINVAL; 455 } 456 } 457 458 return 0; 459 } 460 461 static int hisi_sas_slave_configure(struct scsi_device *sdev) 462 { 463 struct domain_device *dev = sdev_to_domain_dev(sdev); 464 int ret = sas_slave_configure(sdev); 465 466 if (ret) 467 return ret; 468 if (!dev_is_sata(dev)) 469 sas_change_queue_depth(sdev, 64); 470 471 return 0; 472 } 473 474 static void hisi_sas_scan_start(struct Scsi_Host *shost) 475 { 476 struct hisi_hba *hisi_hba = shost_priv(shost); 477 int i; 478 479 for (i = 0; i < hisi_hba->n_phy; ++i) 480 hisi_sas_bytes_dmaed(hisi_hba, i); 481 482 hisi_hba->scan_finished = 1; 483 } 484 485 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time) 486 { 487 struct hisi_hba *hisi_hba = shost_priv(shost); 488 struct sas_ha_struct *sha = &hisi_hba->sha; 489 490 if (hisi_hba->scan_finished == 0) 491 return 0; 492 493 sas_drain_work(sha); 494 return 1; 495 } 496 497 static void hisi_sas_phyup_work(struct work_struct *work) 498 { 499 struct hisi_sas_phy *phy = 500 container_of(work, struct hisi_sas_phy, phyup_ws); 501 struct hisi_hba *hisi_hba = phy->hisi_hba; 502 struct asd_sas_phy *sas_phy = &phy->sas_phy; 503 int phy_no = sas_phy->id; 504 505 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */ 506 hisi_sas_bytes_dmaed(hisi_hba, phy_no); 507 } 508 509 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) 510 { 511 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 512 struct asd_sas_phy *sas_phy = &phy->sas_phy; 513 514 phy->hisi_hba = hisi_hba; 515 phy->port = NULL; 516 init_timer(&phy->timer); 517 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0; 518 sas_phy->class = SAS; 519 sas_phy->iproto = SAS_PROTOCOL_ALL; 520 sas_phy->tproto = 0; 521 sas_phy->type = PHY_TYPE_PHYSICAL; 522 sas_phy->role = PHY_ROLE_INITIATOR; 523 sas_phy->oob_mode = OOB_NOT_CONNECTED; 524 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; 525 sas_phy->id = phy_no; 526 sas_phy->sas_addr = &hisi_hba->sas_addr[0]; 527 sas_phy->frame_rcvd = &phy->frame_rcvd[0]; 528 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata; 529 sas_phy->lldd_phy = phy; 530 531 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work); 532 } 533 534 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) 535 { 536 struct sas_ha_struct *sas_ha = sas_phy->ha; 537 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 538 struct hisi_sas_phy *phy = sas_phy->lldd_phy; 539 struct asd_sas_port *sas_port = sas_phy->port; 540 struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id]; 541 unsigned long flags; 542 543 if (!sas_port) 544 return; 545 546 spin_lock_irqsave(&hisi_hba->lock, flags); 547 port->port_attached = 1; 548 port->id = phy->port_id; 549 phy->port = port; 550 sas_port->lldd_port = port; 551 spin_unlock_irqrestore(&hisi_hba->lock, flags); 552 } 553 554 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no, 555 struct domain_device *device) 556 { 557 struct hisi_sas_phy *phy; 558 struct hisi_sas_port *port; 559 struct hisi_sas_slot *slot, *slot2; 560 struct device *dev = &hisi_hba->pdev->dev; 561 562 phy = &hisi_hba->phy[phy_no]; 563 port = phy->port; 564 if (!port) 565 return; 566 567 list_for_each_entry_safe(slot, slot2, &port->list, entry) { 568 struct sas_task *task; 569 570 task = slot->task; 571 if (device && task->dev != device) 572 continue; 573 574 dev_info(dev, "Release slot [%d:%d], task [%p]:\n", 575 slot->dlvry_queue, slot->dlvry_queue_slot, task); 576 hisi_hba->hw->slot_complete(hisi_hba, slot, 1); 577 } 578 } 579 580 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy) 581 { 582 struct domain_device *device; 583 struct hisi_sas_phy *phy = sas_phy->lldd_phy; 584 struct asd_sas_port *sas_port = sas_phy->port; 585 586 list_for_each_entry(device, &sas_port->dev_list, dev_list_node) 587 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device); 588 } 589 590 static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 591 struct domain_device *device) 592 { 593 struct asd_sas_port *port = device->port; 594 struct asd_sas_phy *sas_phy; 595 596 list_for_each_entry(sas_phy, &port->phy_list, port_phy_el) 597 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device); 598 } 599 600 static void hisi_sas_dev_gone(struct domain_device *device) 601 { 602 struct hisi_sas_device *sas_dev = device->lldd_dev; 603 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 604 struct device *dev = &hisi_hba->pdev->dev; 605 u64 dev_id = sas_dev->device_id; 606 607 dev_info(dev, "found dev[%lld:%x] is gone\n", 608 sas_dev->device_id, sas_dev->dev_type); 609 610 hisi_sas_internal_task_abort(hisi_hba, device, 611 HISI_SAS_INT_ABT_DEV, 0); 612 613 hisi_hba->hw->free_device(hisi_hba, sas_dev); 614 device->lldd_dev = NULL; 615 memset(sas_dev, 0, sizeof(*sas_dev)); 616 sas_dev->device_id = dev_id; 617 sas_dev->dev_type = SAS_PHY_UNUSED; 618 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 619 } 620 621 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) 622 { 623 return hisi_sas_task_exec(task, gfp_flags, 0, NULL); 624 } 625 626 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 627 void *funcdata) 628 { 629 struct sas_ha_struct *sas_ha = sas_phy->ha; 630 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 631 int phy_no = sas_phy->id; 632 633 switch (func) { 634 case PHY_FUNC_HARD_RESET: 635 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); 636 break; 637 638 case PHY_FUNC_LINK_RESET: 639 hisi_hba->hw->phy_enable(hisi_hba, phy_no); 640 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); 641 break; 642 643 case PHY_FUNC_DISABLE: 644 hisi_hba->hw->phy_disable(hisi_hba, phy_no); 645 break; 646 647 case PHY_FUNC_SET_LINK_RATE: 648 case PHY_FUNC_RELEASE_SPINUP_HOLD: 649 default: 650 return -EOPNOTSUPP; 651 } 652 return 0; 653 } 654 655 static void hisi_sas_task_done(struct sas_task *task) 656 { 657 if (!del_timer(&task->slow_task->timer)) 658 return; 659 complete(&task->slow_task->completion); 660 } 661 662 static void hisi_sas_tmf_timedout(unsigned long data) 663 { 664 struct sas_task *task = (struct sas_task *)data; 665 666 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 667 complete(&task->slow_task->completion); 668 } 669 670 #define TASK_TIMEOUT 20 671 #define TASK_RETRY 3 672 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device, 673 void *parameter, u32 para_len, 674 struct hisi_sas_tmf_task *tmf) 675 { 676 struct hisi_sas_device *sas_dev = device->lldd_dev; 677 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 678 struct device *dev = &hisi_hba->pdev->dev; 679 struct sas_task *task; 680 int res, retry; 681 682 for (retry = 0; retry < TASK_RETRY; retry++) { 683 task = sas_alloc_slow_task(GFP_KERNEL); 684 if (!task) 685 return -ENOMEM; 686 687 task->dev = device; 688 task->task_proto = device->tproto; 689 690 memcpy(&task->ssp_task, parameter, para_len); 691 task->task_done = hisi_sas_task_done; 692 693 task->slow_task->timer.data = (unsigned long) task; 694 task->slow_task->timer.function = hisi_sas_tmf_timedout; 695 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ; 696 add_timer(&task->slow_task->timer); 697 698 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf); 699 700 if (res) { 701 del_timer(&task->slow_task->timer); 702 dev_err(dev, "abort tmf: executing internal task failed: %d\n", 703 res); 704 goto ex_err; 705 } 706 707 wait_for_completion(&task->slow_task->completion); 708 res = TMF_RESP_FUNC_FAILED; 709 /* Even TMF timed out, return direct. */ 710 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 711 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 712 dev_err(dev, "abort tmf: TMF task[%d] timeout\n", 713 tmf->tag_of_task_to_be_managed); 714 if (task->lldd_task) { 715 struct hisi_sas_slot *slot = 716 task->lldd_task; 717 718 hisi_sas_slot_task_free(hisi_hba, 719 task, slot); 720 } 721 722 goto ex_err; 723 } 724 } 725 726 if (task->task_status.resp == SAS_TASK_COMPLETE && 727 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 728 res = TMF_RESP_FUNC_COMPLETE; 729 break; 730 } 731 732 if (task->task_status.resp == SAS_TASK_COMPLETE && 733 task->task_status.stat == TMF_RESP_FUNC_SUCC) { 734 res = TMF_RESP_FUNC_SUCC; 735 break; 736 } 737 738 if (task->task_status.resp == SAS_TASK_COMPLETE && 739 task->task_status.stat == SAS_DATA_UNDERRUN) { 740 /* no error, but return the number of bytes of 741 * underrun 742 */ 743 dev_warn(dev, "abort tmf: task to dev %016llx " 744 "resp: 0x%x sts 0x%x underrun\n", 745 SAS_ADDR(device->sas_addr), 746 task->task_status.resp, 747 task->task_status.stat); 748 res = task->task_status.residual; 749 break; 750 } 751 752 if (task->task_status.resp == SAS_TASK_COMPLETE && 753 task->task_status.stat == SAS_DATA_OVERRUN) { 754 dev_warn(dev, "abort tmf: blocked task error\n"); 755 res = -EMSGSIZE; 756 break; 757 } 758 759 dev_warn(dev, "abort tmf: task to dev " 760 "%016llx resp: 0x%x status 0x%x\n", 761 SAS_ADDR(device->sas_addr), task->task_status.resp, 762 task->task_status.stat); 763 sas_free_task(task); 764 task = NULL; 765 } 766 ex_err: 767 WARN_ON(retry == TASK_RETRY); 768 sas_free_task(task); 769 return res; 770 } 771 772 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device, 773 u8 *lun, struct hisi_sas_tmf_task *tmf) 774 { 775 struct sas_ssp_task ssp_task; 776 777 if (!(device->tproto & SAS_PROTOCOL_SSP)) 778 return TMF_RESP_FUNC_ESUPP; 779 780 memcpy(ssp_task.LUN, lun, 8); 781 782 return hisi_sas_exec_internal_tmf_task(device, &ssp_task, 783 sizeof(ssp_task), tmf); 784 } 785 786 static int hisi_sas_abort_task(struct sas_task *task) 787 { 788 struct scsi_lun lun; 789 struct hisi_sas_tmf_task tmf_task; 790 struct domain_device *device = task->dev; 791 struct hisi_sas_device *sas_dev = device->lldd_dev; 792 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); 793 struct device *dev = &hisi_hba->pdev->dev; 794 int rc = TMF_RESP_FUNC_FAILED; 795 unsigned long flags; 796 797 if (!sas_dev) { 798 dev_warn(dev, "Device has been removed\n"); 799 return TMF_RESP_FUNC_FAILED; 800 } 801 802 spin_lock_irqsave(&task->task_state_lock, flags); 803 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 804 spin_unlock_irqrestore(&task->task_state_lock, flags); 805 rc = TMF_RESP_FUNC_COMPLETE; 806 goto out; 807 } 808 809 spin_unlock_irqrestore(&task->task_state_lock, flags); 810 sas_dev->dev_status = HISI_SAS_DEV_EH; 811 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 812 struct scsi_cmnd *cmnd = task->uldd_task; 813 struct hisi_sas_slot *slot = task->lldd_task; 814 u32 tag = slot->idx; 815 816 int_to_scsilun(cmnd->device->lun, &lun); 817 tmf_task.tmf = TMF_ABORT_TASK; 818 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); 819 820 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, 821 &tmf_task); 822 823 /* if successful, clear the task and callback forwards.*/ 824 if (rc == TMF_RESP_FUNC_COMPLETE) { 825 if (task->lldd_task) { 826 struct hisi_sas_slot *slot; 827 828 slot = &hisi_hba->slot_info 829 [tmf_task.tag_of_task_to_be_managed]; 830 spin_lock_irqsave(&hisi_hba->lock, flags); 831 hisi_hba->hw->slot_complete(hisi_hba, slot, 1); 832 spin_unlock_irqrestore(&hisi_hba->lock, flags); 833 } 834 } 835 836 hisi_sas_internal_task_abort(hisi_hba, device, 837 HISI_SAS_INT_ABT_CMD, tag); 838 } else if (task->task_proto & SAS_PROTOCOL_SATA || 839 task->task_proto & SAS_PROTOCOL_STP) { 840 if (task->dev->dev_type == SAS_SATA_DEV) { 841 hisi_sas_internal_task_abort(hisi_hba, device, 842 HISI_SAS_INT_ABT_DEV, 0); 843 rc = TMF_RESP_FUNC_COMPLETE; 844 } 845 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 846 /* SMP */ 847 struct hisi_sas_slot *slot = task->lldd_task; 848 u32 tag = slot->idx; 849 850 hisi_sas_internal_task_abort(hisi_hba, device, 851 HISI_SAS_INT_ABT_CMD, tag); 852 } 853 854 out: 855 if (rc != TMF_RESP_FUNC_COMPLETE) 856 dev_notice(dev, "abort task: rc=%d\n", rc); 857 return rc; 858 } 859 860 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) 861 { 862 struct hisi_sas_tmf_task tmf_task; 863 int rc = TMF_RESP_FUNC_FAILED; 864 865 tmf_task.tmf = TMF_ABORT_TASK_SET; 866 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 867 868 return rc; 869 } 870 871 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun) 872 { 873 int rc = TMF_RESP_FUNC_FAILED; 874 struct hisi_sas_tmf_task tmf_task; 875 876 tmf_task.tmf = TMF_CLEAR_ACA; 877 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 878 879 return rc; 880 } 881 882 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) 883 { 884 struct sas_phy *phy = sas_get_local_phy(device); 885 int rc, reset_type = (device->dev_type == SAS_SATA_DEV || 886 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; 887 rc = sas_phy_reset(phy, reset_type); 888 sas_put_local_phy(phy); 889 msleep(2000); 890 return rc; 891 } 892 893 static int hisi_sas_I_T_nexus_reset(struct domain_device *device) 894 { 895 struct hisi_sas_device *sas_dev = device->lldd_dev; 896 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 897 unsigned long flags; 898 int rc = TMF_RESP_FUNC_FAILED; 899 900 if (sas_dev->dev_status != HISI_SAS_DEV_EH) 901 return TMF_RESP_FUNC_FAILED; 902 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 903 904 rc = hisi_sas_debug_I_T_nexus_reset(device); 905 906 spin_lock_irqsave(&hisi_hba->lock, flags); 907 hisi_sas_release_task(hisi_hba, device); 908 spin_unlock_irqrestore(&hisi_hba->lock, flags); 909 910 return 0; 911 } 912 913 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) 914 { 915 struct hisi_sas_tmf_task tmf_task; 916 struct hisi_sas_device *sas_dev = device->lldd_dev; 917 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 918 struct device *dev = &hisi_hba->pdev->dev; 919 unsigned long flags; 920 int rc = TMF_RESP_FUNC_FAILED; 921 922 tmf_task.tmf = TMF_LU_RESET; 923 sas_dev->dev_status = HISI_SAS_DEV_EH; 924 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task); 925 if (rc == TMF_RESP_FUNC_COMPLETE) { 926 spin_lock_irqsave(&hisi_hba->lock, flags); 927 hisi_sas_release_task(hisi_hba, device); 928 spin_unlock_irqrestore(&hisi_hba->lock, flags); 929 } 930 931 /* If failed, fall-through I_T_Nexus reset */ 932 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n", 933 sas_dev->device_id, rc); 934 return rc; 935 } 936 937 static int hisi_sas_query_task(struct sas_task *task) 938 { 939 struct scsi_lun lun; 940 struct hisi_sas_tmf_task tmf_task; 941 int rc = TMF_RESP_FUNC_FAILED; 942 943 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 944 struct scsi_cmnd *cmnd = task->uldd_task; 945 struct domain_device *device = task->dev; 946 struct hisi_sas_slot *slot = task->lldd_task; 947 u32 tag = slot->idx; 948 949 int_to_scsilun(cmnd->device->lun, &lun); 950 tmf_task.tmf = TMF_QUERY_TASK; 951 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag); 952 953 rc = hisi_sas_debug_issue_ssp_tmf(device, 954 lun.scsi_lun, 955 &tmf_task); 956 switch (rc) { 957 /* The task is still in Lun, release it then */ 958 case TMF_RESP_FUNC_SUCC: 959 /* The task is not in Lun or failed, reset the phy */ 960 case TMF_RESP_FUNC_FAILED: 961 case TMF_RESP_FUNC_COMPLETE: 962 break; 963 } 964 } 965 return rc; 966 } 967 968 static int 969 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id, 970 struct sas_task *task, int abort_flag, 971 int task_tag) 972 { 973 struct domain_device *device = task->dev; 974 struct hisi_sas_device *sas_dev = device->lldd_dev; 975 struct device *dev = &hisi_hba->pdev->dev; 976 struct hisi_sas_port *port; 977 struct hisi_sas_slot *slot; 978 struct hisi_sas_cmd_hdr *cmd_hdr_base; 979 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx; 980 981 if (!device->port) 982 return -1; 983 984 port = device->port->lldd_port; 985 986 /* simply get a slot and send abort command */ 987 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx); 988 if (rc) 989 goto err_out; 990 rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue, 991 &dlvry_queue_slot); 992 if (rc) 993 goto err_out_tag; 994 995 slot = &hisi_hba->slot_info[slot_idx]; 996 memset(slot, 0, sizeof(struct hisi_sas_slot)); 997 998 slot->idx = slot_idx; 999 slot->n_elem = n_elem; 1000 slot->dlvry_queue = dlvry_queue; 1001 slot->dlvry_queue_slot = dlvry_queue_slot; 1002 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 1003 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 1004 slot->task = task; 1005 slot->port = port; 1006 task->lldd_task = slot; 1007 1008 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 1009 1010 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id, 1011 abort_flag, task_tag); 1012 if (rc) 1013 goto err_out_tag; 1014 1015 /* Port structure is static for the HBA, so 1016 * even if the port is deformed it is ok 1017 * to reference. 1018 */ 1019 list_add_tail(&slot->entry, &port->list); 1020 spin_lock(&task->task_state_lock); 1021 task->task_state_flags |= SAS_TASK_AT_INITIATOR; 1022 spin_unlock(&task->task_state_lock); 1023 1024 hisi_hba->slot_prep = slot; 1025 1026 sas_dev->running_req++; 1027 /* send abort command to our chip */ 1028 hisi_hba->hw->start_delivery(hisi_hba); 1029 1030 return 0; 1031 1032 err_out_tag: 1033 hisi_sas_slot_index_free(hisi_hba, slot_idx); 1034 err_out: 1035 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc); 1036 1037 return rc; 1038 } 1039 1040 /** 1041 * hisi_sas_internal_task_abort -- execute an internal 1042 * abort command for single IO command or a device 1043 * @hisi_hba: host controller struct 1044 * @device: domain device 1045 * @abort_flag: mode of operation, device or single IO 1046 * @tag: tag of IO to be aborted (only relevant to single 1047 * IO mode) 1048 */ 1049 static int 1050 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba, 1051 struct domain_device *device, 1052 int abort_flag, int tag) 1053 { 1054 struct sas_task *task; 1055 struct hisi_sas_device *sas_dev = device->lldd_dev; 1056 struct device *dev = &hisi_hba->pdev->dev; 1057 int res; 1058 unsigned long flags; 1059 1060 if (!hisi_hba->hw->prep_abort) 1061 return -EOPNOTSUPP; 1062 1063 task = sas_alloc_slow_task(GFP_KERNEL); 1064 if (!task) 1065 return -ENOMEM; 1066 1067 task->dev = device; 1068 task->task_proto = device->tproto; 1069 task->task_done = hisi_sas_task_done; 1070 task->slow_task->timer.data = (unsigned long)task; 1071 task->slow_task->timer.function = hisi_sas_tmf_timedout; 1072 task->slow_task->timer.expires = jiffies + 20*HZ; 1073 add_timer(&task->slow_task->timer); 1074 1075 /* Lock as we are alloc'ing a slot, which cannot be interrupted */ 1076 spin_lock_irqsave(&hisi_hba->lock, flags); 1077 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id, 1078 task, abort_flag, tag); 1079 spin_unlock_irqrestore(&hisi_hba->lock, flags); 1080 if (res) { 1081 del_timer(&task->slow_task->timer); 1082 dev_err(dev, "internal task abort: executing internal task failed: %d\n", 1083 res); 1084 goto exit; 1085 } 1086 wait_for_completion(&task->slow_task->completion); 1087 res = TMF_RESP_FUNC_FAILED; 1088 1089 if (task->task_status.resp == SAS_TASK_COMPLETE && 1090 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { 1091 res = TMF_RESP_FUNC_COMPLETE; 1092 goto exit; 1093 } 1094 1095 /* TMF timed out, return direct. */ 1096 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 1097 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 1098 dev_err(dev, "internal task abort: timeout.\n"); 1099 if (task->lldd_task) { 1100 struct hisi_sas_slot *slot = task->lldd_task; 1101 1102 hisi_sas_slot_task_free(hisi_hba, task, slot); 1103 } 1104 } 1105 } 1106 1107 exit: 1108 dev_info(dev, "internal task abort: task to dev %016llx task=%p " 1109 "resp: 0x%x sts 0x%x\n", 1110 SAS_ADDR(device->sas_addr), 1111 task, 1112 task->task_status.resp, /* 0 is complete, -1 is undelivered */ 1113 task->task_status.stat); 1114 sas_free_task(task); 1115 1116 return res; 1117 } 1118 1119 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) 1120 { 1121 hisi_sas_port_notify_formed(sas_phy); 1122 } 1123 1124 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy) 1125 { 1126 hisi_sas_port_notify_deformed(sas_phy); 1127 } 1128 1129 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) 1130 { 1131 phy->phy_attached = 0; 1132 phy->phy_type = 0; 1133 phy->port = NULL; 1134 } 1135 1136 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy) 1137 { 1138 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1139 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1140 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1141 1142 if (rdy) { 1143 /* Phy down but ready */ 1144 hisi_sas_bytes_dmaed(hisi_hba, phy_no); 1145 hisi_sas_port_notify_formed(sas_phy); 1146 } else { 1147 struct hisi_sas_port *port = phy->port; 1148 1149 /* Phy down and not ready */ 1150 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL); 1151 sas_phy_disconnected(sas_phy); 1152 1153 if (port) { 1154 if (phy->phy_type & PORT_TYPE_SAS) { 1155 int port_id = port->id; 1156 1157 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, 1158 port_id)) 1159 port->port_attached = 0; 1160 } else if (phy->phy_type & PORT_TYPE_SATA) 1161 port->port_attached = 0; 1162 } 1163 hisi_sas_phy_disconnected(phy); 1164 } 1165 } 1166 EXPORT_SYMBOL_GPL(hisi_sas_phy_down); 1167 1168 static struct scsi_transport_template *hisi_sas_stt; 1169 1170 static struct scsi_host_template hisi_sas_sht = { 1171 .module = THIS_MODULE, 1172 .name = DRV_NAME, 1173 .queuecommand = sas_queuecommand, 1174 .target_alloc = sas_target_alloc, 1175 .slave_configure = hisi_sas_slave_configure, 1176 .scan_finished = hisi_sas_scan_finished, 1177 .scan_start = hisi_sas_scan_start, 1178 .change_queue_depth = sas_change_queue_depth, 1179 .bios_param = sas_bios_param, 1180 .can_queue = 1, 1181 .this_id = -1, 1182 .sg_tablesize = SG_ALL, 1183 .max_sectors = SCSI_DEFAULT_MAX_SECTORS, 1184 .use_clustering = ENABLE_CLUSTERING, 1185 .eh_device_reset_handler = sas_eh_device_reset_handler, 1186 .eh_bus_reset_handler = sas_eh_bus_reset_handler, 1187 .target_destroy = sas_target_destroy, 1188 .ioctl = sas_ioctl, 1189 }; 1190 1191 static struct sas_domain_function_template hisi_sas_transport_ops = { 1192 .lldd_dev_found = hisi_sas_dev_found, 1193 .lldd_dev_gone = hisi_sas_dev_gone, 1194 .lldd_execute_task = hisi_sas_queue_command, 1195 .lldd_control_phy = hisi_sas_control_phy, 1196 .lldd_abort_task = hisi_sas_abort_task, 1197 .lldd_abort_task_set = hisi_sas_abort_task_set, 1198 .lldd_clear_aca = hisi_sas_clear_aca, 1199 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, 1200 .lldd_lu_reset = hisi_sas_lu_reset, 1201 .lldd_query_task = hisi_sas_query_task, 1202 .lldd_port_formed = hisi_sas_port_formed, 1203 .lldd_port_deformed = hisi_sas_port_deformed, 1204 }; 1205 1206 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost) 1207 { 1208 struct platform_device *pdev = hisi_hba->pdev; 1209 struct device *dev = &pdev->dev; 1210 int i, s, max_command_entries = hisi_hba->hw->max_command_entries; 1211 1212 spin_lock_init(&hisi_hba->lock); 1213 for (i = 0; i < hisi_hba->n_phy; i++) { 1214 hisi_sas_phy_init(hisi_hba, i); 1215 hisi_hba->port[i].port_attached = 0; 1216 hisi_hba->port[i].id = -1; 1217 INIT_LIST_HEAD(&hisi_hba->port[i].list); 1218 } 1219 1220 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1221 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; 1222 hisi_hba->devices[i].device_id = i; 1223 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL; 1224 } 1225 1226 for (i = 0; i < hisi_hba->queue_count; i++) { 1227 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 1228 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 1229 1230 /* Completion queue structure */ 1231 cq->id = i; 1232 cq->hisi_hba = hisi_hba; 1233 1234 /* Delivery queue structure */ 1235 dq->id = i; 1236 dq->hisi_hba = hisi_hba; 1237 1238 /* Delivery queue */ 1239 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 1240 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s, 1241 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL); 1242 if (!hisi_hba->cmd_hdr[i]) 1243 goto err_out; 1244 memset(hisi_hba->cmd_hdr[i], 0, s); 1245 1246 /* Completion queue */ 1247 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 1248 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s, 1249 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL); 1250 if (!hisi_hba->complete_hdr[i]) 1251 goto err_out; 1252 memset(hisi_hba->complete_hdr[i], 0, s); 1253 } 1254 1255 s = HISI_SAS_STATUS_BUF_SZ; 1256 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer", 1257 dev, s, 16, 0); 1258 if (!hisi_hba->status_buffer_pool) 1259 goto err_out; 1260 1261 s = HISI_SAS_COMMAND_TABLE_SZ; 1262 hisi_hba->command_table_pool = dma_pool_create("command_table", 1263 dev, s, 16, 0); 1264 if (!hisi_hba->command_table_pool) 1265 goto err_out; 1266 1267 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 1268 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma, 1269 GFP_KERNEL); 1270 if (!hisi_hba->itct) 1271 goto err_out; 1272 1273 memset(hisi_hba->itct, 0, s); 1274 1275 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, 1276 sizeof(struct hisi_sas_slot), 1277 GFP_KERNEL); 1278 if (!hisi_hba->slot_info) 1279 goto err_out; 1280 1281 s = max_command_entries * sizeof(struct hisi_sas_iost); 1282 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma, 1283 GFP_KERNEL); 1284 if (!hisi_hba->iost) 1285 goto err_out; 1286 1287 memset(hisi_hba->iost, 0, s); 1288 1289 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 1290 hisi_hba->breakpoint = dma_alloc_coherent(dev, s, 1291 &hisi_hba->breakpoint_dma, GFP_KERNEL); 1292 if (!hisi_hba->breakpoint) 1293 goto err_out; 1294 1295 memset(hisi_hba->breakpoint, 0, s); 1296 1297 hisi_hba->slot_index_count = max_command_entries; 1298 s = hisi_hba->slot_index_count / BITS_PER_BYTE; 1299 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL); 1300 if (!hisi_hba->slot_index_tags) 1301 goto err_out; 1302 1303 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev, 1304 sizeof(struct hisi_sas_sge_page), 16, 0); 1305 if (!hisi_hba->sge_page_pool) 1306 goto err_out; 1307 1308 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 1309 hisi_hba->initial_fis = dma_alloc_coherent(dev, s, 1310 &hisi_hba->initial_fis_dma, GFP_KERNEL); 1311 if (!hisi_hba->initial_fis) 1312 goto err_out; 1313 memset(hisi_hba->initial_fis, 0, s); 1314 1315 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; 1316 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s, 1317 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL); 1318 if (!hisi_hba->sata_breakpoint) 1319 goto err_out; 1320 memset(hisi_hba->sata_breakpoint, 0, s); 1321 1322 hisi_sas_slot_index_init(hisi_hba); 1323 1324 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); 1325 if (!hisi_hba->wq) { 1326 dev_err(dev, "sas_alloc: failed to create workqueue\n"); 1327 goto err_out; 1328 } 1329 1330 return 0; 1331 err_out: 1332 return -ENOMEM; 1333 } 1334 1335 static void hisi_sas_free(struct hisi_hba *hisi_hba) 1336 { 1337 struct device *dev = &hisi_hba->pdev->dev; 1338 int i, s, max_command_entries = hisi_hba->hw->max_command_entries; 1339 1340 for (i = 0; i < hisi_hba->queue_count; i++) { 1341 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 1342 if (hisi_hba->cmd_hdr[i]) 1343 dma_free_coherent(dev, s, 1344 hisi_hba->cmd_hdr[i], 1345 hisi_hba->cmd_hdr_dma[i]); 1346 1347 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 1348 if (hisi_hba->complete_hdr[i]) 1349 dma_free_coherent(dev, s, 1350 hisi_hba->complete_hdr[i], 1351 hisi_hba->complete_hdr_dma[i]); 1352 } 1353 1354 dma_pool_destroy(hisi_hba->status_buffer_pool); 1355 dma_pool_destroy(hisi_hba->command_table_pool); 1356 dma_pool_destroy(hisi_hba->sge_page_pool); 1357 1358 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 1359 if (hisi_hba->itct) 1360 dma_free_coherent(dev, s, 1361 hisi_hba->itct, hisi_hba->itct_dma); 1362 1363 s = max_command_entries * sizeof(struct hisi_sas_iost); 1364 if (hisi_hba->iost) 1365 dma_free_coherent(dev, s, 1366 hisi_hba->iost, hisi_hba->iost_dma); 1367 1368 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 1369 if (hisi_hba->breakpoint) 1370 dma_free_coherent(dev, s, 1371 hisi_hba->breakpoint, 1372 hisi_hba->breakpoint_dma); 1373 1374 1375 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 1376 if (hisi_hba->initial_fis) 1377 dma_free_coherent(dev, s, 1378 hisi_hba->initial_fis, 1379 hisi_hba->initial_fis_dma); 1380 1381 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2; 1382 if (hisi_hba->sata_breakpoint) 1383 dma_free_coherent(dev, s, 1384 hisi_hba->sata_breakpoint, 1385 hisi_hba->sata_breakpoint_dma); 1386 1387 if (hisi_hba->wq) 1388 destroy_workqueue(hisi_hba->wq); 1389 } 1390 1391 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, 1392 const struct hisi_sas_hw *hw) 1393 { 1394 struct resource *res; 1395 struct Scsi_Host *shost; 1396 struct hisi_hba *hisi_hba; 1397 struct device *dev = &pdev->dev; 1398 struct device_node *np = pdev->dev.of_node; 1399 1400 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba)); 1401 if (!shost) 1402 goto err_out; 1403 hisi_hba = shost_priv(shost); 1404 1405 hisi_hba->hw = hw; 1406 hisi_hba->pdev = pdev; 1407 hisi_hba->shost = shost; 1408 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; 1409 1410 init_timer(&hisi_hba->timer); 1411 1412 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, 1413 SAS_ADDR_SIZE)) 1414 goto err_out; 1415 1416 if (np) { 1417 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, 1418 "hisilicon,sas-syscon"); 1419 if (IS_ERR(hisi_hba->ctrl)) 1420 goto err_out; 1421 1422 if (device_property_read_u32(dev, "ctrl-reset-reg", 1423 &hisi_hba->ctrl_reset_reg)) 1424 goto err_out; 1425 1426 if (device_property_read_u32(dev, "ctrl-reset-sts-reg", 1427 &hisi_hba->ctrl_reset_sts_reg)) 1428 goto err_out; 1429 1430 if (device_property_read_u32(dev, "ctrl-clock-ena-reg", 1431 &hisi_hba->ctrl_clock_ena_reg)) 1432 goto err_out; 1433 } 1434 1435 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) 1436 goto err_out; 1437 1438 if (device_property_read_u32(dev, "queue-count", 1439 &hisi_hba->queue_count)) 1440 goto err_out; 1441 1442 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) && 1443 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) { 1444 dev_err(dev, "No usable DMA addressing method\n"); 1445 goto err_out; 1446 } 1447 1448 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1449 hisi_hba->regs = devm_ioremap_resource(dev, res); 1450 if (IS_ERR(hisi_hba->regs)) 1451 goto err_out; 1452 1453 if (hisi_sas_alloc(hisi_hba, shost)) { 1454 hisi_sas_free(hisi_hba); 1455 goto err_out; 1456 } 1457 1458 return shost; 1459 err_out: 1460 dev_err(dev, "shost alloc failed\n"); 1461 return NULL; 1462 } 1463 1464 static void hisi_sas_init_add(struct hisi_hba *hisi_hba) 1465 { 1466 int i; 1467 1468 for (i = 0; i < hisi_hba->n_phy; i++) 1469 memcpy(&hisi_hba->phy[i].dev_sas_addr, 1470 hisi_hba->sas_addr, 1471 SAS_ADDR_SIZE); 1472 } 1473 1474 int hisi_sas_probe(struct platform_device *pdev, 1475 const struct hisi_sas_hw *hw) 1476 { 1477 struct Scsi_Host *shost; 1478 struct hisi_hba *hisi_hba; 1479 struct device *dev = &pdev->dev; 1480 struct asd_sas_phy **arr_phy; 1481 struct asd_sas_port **arr_port; 1482 struct sas_ha_struct *sha; 1483 int rc, phy_nr, port_nr, i; 1484 1485 shost = hisi_sas_shost_alloc(pdev, hw); 1486 if (!shost) { 1487 rc = -ENOMEM; 1488 goto err_out_ha; 1489 } 1490 1491 sha = SHOST_TO_SAS_HA(shost); 1492 hisi_hba = shost_priv(shost); 1493 platform_set_drvdata(pdev, sha); 1494 1495 phy_nr = port_nr = hisi_hba->n_phy; 1496 1497 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); 1498 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); 1499 if (!arr_phy || !arr_port) 1500 return -ENOMEM; 1501 1502 sha->sas_phy = arr_phy; 1503 sha->sas_port = arr_port; 1504 sha->core.shost = shost; 1505 sha->lldd_ha = hisi_hba; 1506 1507 shost->transportt = hisi_sas_stt; 1508 shost->max_id = HISI_SAS_MAX_DEVICES; 1509 shost->max_lun = ~0; 1510 shost->max_channel = 1; 1511 shost->max_cmd_len = 16; 1512 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT); 1513 shost->can_queue = hisi_hba->hw->max_command_entries; 1514 shost->cmd_per_lun = hisi_hba->hw->max_command_entries; 1515 1516 sha->sas_ha_name = DRV_NAME; 1517 sha->dev = &hisi_hba->pdev->dev; 1518 sha->lldd_module = THIS_MODULE; 1519 sha->sas_addr = &hisi_hba->sas_addr[0]; 1520 sha->num_phys = hisi_hba->n_phy; 1521 sha->core.shost = hisi_hba->shost; 1522 1523 for (i = 0; i < hisi_hba->n_phy; i++) { 1524 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; 1525 sha->sas_port[i] = &hisi_hba->port[i].sas_port; 1526 } 1527 1528 hisi_sas_init_add(hisi_hba); 1529 1530 rc = hisi_hba->hw->hw_init(hisi_hba); 1531 if (rc) 1532 goto err_out_ha; 1533 1534 rc = scsi_add_host(shost, &pdev->dev); 1535 if (rc) 1536 goto err_out_ha; 1537 1538 rc = sas_register_ha(sha); 1539 if (rc) 1540 goto err_out_register_ha; 1541 1542 scsi_scan_host(shost); 1543 1544 return 0; 1545 1546 err_out_register_ha: 1547 scsi_remove_host(shost); 1548 err_out_ha: 1549 kfree(shost); 1550 return rc; 1551 } 1552 EXPORT_SYMBOL_GPL(hisi_sas_probe); 1553 1554 int hisi_sas_remove(struct platform_device *pdev) 1555 { 1556 struct sas_ha_struct *sha = platform_get_drvdata(pdev); 1557 struct hisi_hba *hisi_hba = sha->lldd_ha; 1558 1559 scsi_remove_host(sha->core.shost); 1560 sas_unregister_ha(sha); 1561 sas_remove_host(sha->core.shost); 1562 1563 hisi_sas_free(hisi_hba); 1564 return 0; 1565 } 1566 EXPORT_SYMBOL_GPL(hisi_sas_remove); 1567 1568 static __init int hisi_sas_init(void) 1569 { 1570 pr_info("hisi_sas: driver version %s\n", DRV_VERSION); 1571 1572 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); 1573 if (!hisi_sas_stt) 1574 return -ENOMEM; 1575 1576 return 0; 1577 } 1578 1579 static __exit void hisi_sas_exit(void) 1580 { 1581 sas_release_transport(hisi_sas_stt); 1582 } 1583 1584 module_init(hisi_sas_init); 1585 module_exit(hisi_sas_exit); 1586 1587 MODULE_VERSION(DRV_VERSION); 1588 MODULE_LICENSE("GPL"); 1589 MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); 1590 MODULE_DESCRIPTION("HISILICON SAS controller driver"); 1591 MODULE_ALIAS("platform:" DRV_NAME); 1592