1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2015 Linaro Ltd. 4 * Copyright (c) 2015 Hisilicon Limited. 5 */ 6 7 #include "hisi_sas.h" 8 #define DRV_NAME "hisi_sas" 9 10 #define DEV_IS_GONE(dev) \ 11 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED)) 12 13 static int hisi_sas_softreset_ata_disk(struct domain_device *device); 14 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 15 void *funcdata); 16 static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 17 struct domain_device *device); 18 static void hisi_sas_dev_gone(struct domain_device *device); 19 20 struct hisi_sas_internal_abort_data { 21 bool rst_ha_timeout; /* reset the HA for timeout */ 22 }; 23 24 u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction) 25 { 26 switch (fis->command) { 27 case ATA_CMD_FPDMA_WRITE: 28 case ATA_CMD_FPDMA_READ: 29 case ATA_CMD_FPDMA_RECV: 30 case ATA_CMD_FPDMA_SEND: 31 case ATA_CMD_NCQ_NON_DATA: 32 return HISI_SAS_SATA_PROTOCOL_FPDMA; 33 34 case ATA_CMD_DOWNLOAD_MICRO: 35 case ATA_CMD_ID_ATA: 36 case ATA_CMD_PMP_READ: 37 case ATA_CMD_READ_LOG_EXT: 38 case ATA_CMD_PIO_READ: 39 case ATA_CMD_PIO_READ_EXT: 40 case ATA_CMD_PMP_WRITE: 41 case ATA_CMD_WRITE_LOG_EXT: 42 case ATA_CMD_PIO_WRITE: 43 case ATA_CMD_PIO_WRITE_EXT: 44 return HISI_SAS_SATA_PROTOCOL_PIO; 45 46 case ATA_CMD_DSM: 47 case ATA_CMD_DOWNLOAD_MICRO_DMA: 48 case ATA_CMD_PMP_READ_DMA: 49 case ATA_CMD_PMP_WRITE_DMA: 50 case ATA_CMD_READ: 51 case ATA_CMD_READ_EXT: 52 case ATA_CMD_READ_LOG_DMA_EXT: 53 case ATA_CMD_READ_STREAM_DMA_EXT: 54 case ATA_CMD_TRUSTED_RCV_DMA: 55 case ATA_CMD_TRUSTED_SND_DMA: 56 case ATA_CMD_WRITE: 57 case ATA_CMD_WRITE_EXT: 58 case ATA_CMD_WRITE_FUA_EXT: 59 case ATA_CMD_WRITE_QUEUED: 60 case ATA_CMD_WRITE_LOG_DMA_EXT: 61 case ATA_CMD_WRITE_STREAM_DMA_EXT: 62 case ATA_CMD_ZAC_MGMT_IN: 63 return HISI_SAS_SATA_PROTOCOL_DMA; 64 65 case ATA_CMD_CHK_POWER: 66 case ATA_CMD_DEV_RESET: 67 case ATA_CMD_EDD: 68 case ATA_CMD_FLUSH: 69 case ATA_CMD_FLUSH_EXT: 70 case ATA_CMD_VERIFY: 71 case ATA_CMD_VERIFY_EXT: 72 case ATA_CMD_SET_FEATURES: 73 case ATA_CMD_STANDBY: 74 case ATA_CMD_STANDBYNOW1: 75 case ATA_CMD_ZAC_MGMT_OUT: 76 return HISI_SAS_SATA_PROTOCOL_NONDATA; 77 78 case ATA_CMD_SET_MAX: 79 switch (fis->features) { 80 case ATA_SET_MAX_PASSWD: 81 case ATA_SET_MAX_LOCK: 82 return HISI_SAS_SATA_PROTOCOL_PIO; 83 84 case ATA_SET_MAX_PASSWD_DMA: 85 case ATA_SET_MAX_UNLOCK_DMA: 86 return HISI_SAS_SATA_PROTOCOL_DMA; 87 88 default: 89 return HISI_SAS_SATA_PROTOCOL_NONDATA; 90 } 91 92 default: 93 { 94 if (direction == DMA_NONE) 95 return HISI_SAS_SATA_PROTOCOL_NONDATA; 96 return HISI_SAS_SATA_PROTOCOL_PIO; 97 } 98 } 99 } 100 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol); 101 102 void hisi_sas_sata_done(struct sas_task *task, 103 struct hisi_sas_slot *slot) 104 { 105 struct task_status_struct *ts = &task->task_status; 106 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf; 107 struct hisi_sas_status_buffer *status_buf = 108 hisi_sas_status_buf_addr_mem(slot); 109 u8 *iu = &status_buf->iu[0]; 110 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu; 111 112 resp->frame_len = sizeof(struct dev_to_host_fis); 113 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis)); 114 115 ts->buf_valid_size = sizeof(*resp); 116 } 117 EXPORT_SYMBOL_GPL(hisi_sas_sata_done); 118 119 /* 120 * This function assumes linkrate mask fits in 8 bits, which it 121 * does for all HW versions supported. 122 */ 123 u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max) 124 { 125 u8 rate = 0; 126 int i; 127 128 max -= SAS_LINK_RATE_1_5_GBPS; 129 for (i = 0; i <= max; i++) 130 rate |= 1 << (i * 2); 131 return rate; 132 } 133 EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask); 134 135 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device) 136 { 137 return device->port->ha->lldd_ha; 138 } 139 140 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port) 141 { 142 return container_of(sas_port, struct hisi_sas_port, sas_port); 143 } 144 EXPORT_SYMBOL_GPL(to_hisi_sas_port); 145 146 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba) 147 { 148 int phy_no; 149 150 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) 151 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 152 } 153 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys); 154 155 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx) 156 { 157 void *bitmap = hisi_hba->slot_index_tags; 158 159 __clear_bit(slot_idx, bitmap); 160 } 161 162 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) 163 { 164 if (hisi_hba->hw->slot_index_alloc || 165 slot_idx < HISI_SAS_RESERVED_IPTT) { 166 spin_lock(&hisi_hba->lock); 167 hisi_sas_slot_index_clear(hisi_hba, slot_idx); 168 spin_unlock(&hisi_hba->lock); 169 } 170 } 171 172 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) 173 { 174 void *bitmap = hisi_hba->slot_index_tags; 175 176 __set_bit(slot_idx, bitmap); 177 } 178 179 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, 180 struct request *rq) 181 { 182 int index; 183 void *bitmap = hisi_hba->slot_index_tags; 184 185 if (rq) 186 return rq->tag + HISI_SAS_RESERVED_IPTT; 187 188 spin_lock(&hisi_hba->lock); 189 index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT, 190 hisi_hba->last_slot_index + 1); 191 if (index >= HISI_SAS_RESERVED_IPTT) { 192 index = find_next_zero_bit(bitmap, 193 HISI_SAS_RESERVED_IPTT, 194 0); 195 if (index >= HISI_SAS_RESERVED_IPTT) { 196 spin_unlock(&hisi_hba->lock); 197 return -SAS_QUEUE_FULL; 198 } 199 } 200 hisi_sas_slot_index_set(hisi_hba, index); 201 hisi_hba->last_slot_index = index; 202 spin_unlock(&hisi_hba->lock); 203 204 return index; 205 } 206 207 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, 208 struct hisi_sas_slot *slot, bool need_lock) 209 { 210 int device_id = slot->device_id; 211 struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id]; 212 213 if (task) { 214 struct device *dev = hisi_hba->dev; 215 216 if (!task->lldd_task) 217 return; 218 219 task->lldd_task = NULL; 220 221 if (!sas_protocol_ata(task->task_proto)) { 222 if (slot->n_elem) { 223 if (task->task_proto & SAS_PROTOCOL_SSP) 224 dma_unmap_sg(dev, task->scatter, 225 task->num_scatter, 226 task->data_dir); 227 else 228 dma_unmap_sg(dev, &task->smp_task.smp_req, 229 1, DMA_TO_DEVICE); 230 } 231 if (slot->n_elem_dif) { 232 struct sas_ssp_task *ssp_task = &task->ssp_task; 233 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd; 234 235 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd), 236 scsi_prot_sg_count(scsi_cmnd), 237 task->data_dir); 238 } 239 } 240 } 241 242 if (need_lock) { 243 spin_lock(&sas_dev->lock); 244 list_del_init(&slot->entry); 245 spin_unlock(&sas_dev->lock); 246 } else { 247 list_del_init(&slot->entry); 248 } 249 250 memset(slot, 0, offsetof(struct hisi_sas_slot, buf)); 251 252 hisi_sas_slot_index_free(hisi_hba, slot->idx); 253 } 254 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free); 255 256 static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba, 257 struct hisi_sas_slot *slot) 258 { 259 hisi_hba->hw->prep_smp(hisi_hba, slot); 260 } 261 262 static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba, 263 struct hisi_sas_slot *slot) 264 { 265 hisi_hba->hw->prep_ssp(hisi_hba, slot); 266 } 267 268 static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba, 269 struct hisi_sas_slot *slot) 270 { 271 hisi_hba->hw->prep_stp(hisi_hba, slot); 272 } 273 274 static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba, 275 struct hisi_sas_slot *slot) 276 { 277 hisi_hba->hw->prep_abort(hisi_hba, slot); 278 } 279 280 static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba, 281 struct sas_task *task, int n_elem) 282 { 283 struct device *dev = hisi_hba->dev; 284 285 if (!sas_protocol_ata(task->task_proto) && n_elem) { 286 if (task->num_scatter) { 287 dma_unmap_sg(dev, task->scatter, task->num_scatter, 288 task->data_dir); 289 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 290 dma_unmap_sg(dev, &task->smp_task.smp_req, 291 1, DMA_TO_DEVICE); 292 } 293 } 294 } 295 296 static int hisi_sas_dma_map(struct hisi_hba *hisi_hba, 297 struct sas_task *task, int *n_elem) 298 { 299 struct device *dev = hisi_hba->dev; 300 int rc; 301 302 if (sas_protocol_ata(task->task_proto)) { 303 *n_elem = task->num_scatter; 304 } else { 305 unsigned int req_len; 306 307 if (task->num_scatter) { 308 *n_elem = dma_map_sg(dev, task->scatter, 309 task->num_scatter, task->data_dir); 310 if (!*n_elem) { 311 rc = -ENOMEM; 312 goto prep_out; 313 } 314 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 315 *n_elem = dma_map_sg(dev, &task->smp_task.smp_req, 316 1, DMA_TO_DEVICE); 317 if (!*n_elem) { 318 rc = -ENOMEM; 319 goto prep_out; 320 } 321 req_len = sg_dma_len(&task->smp_task.smp_req); 322 if (req_len & 0x3) { 323 rc = -EINVAL; 324 goto err_out_dma_unmap; 325 } 326 } 327 } 328 329 if (*n_elem > HISI_SAS_SGE_PAGE_CNT) { 330 dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n", 331 *n_elem); 332 rc = -EINVAL; 333 goto err_out_dma_unmap; 334 } 335 return 0; 336 337 err_out_dma_unmap: 338 /* It would be better to call dma_unmap_sg() here, but it's messy */ 339 hisi_sas_dma_unmap(hisi_hba, task, *n_elem); 340 prep_out: 341 return rc; 342 } 343 344 static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba, 345 struct sas_task *task, int n_elem_dif) 346 { 347 struct device *dev = hisi_hba->dev; 348 349 if (n_elem_dif) { 350 struct sas_ssp_task *ssp_task = &task->ssp_task; 351 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd; 352 353 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd), 354 scsi_prot_sg_count(scsi_cmnd), 355 task->data_dir); 356 } 357 } 358 359 static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba, 360 int *n_elem_dif, struct sas_task *task) 361 { 362 struct device *dev = hisi_hba->dev; 363 struct sas_ssp_task *ssp_task; 364 struct scsi_cmnd *scsi_cmnd; 365 int rc; 366 367 if (task->num_scatter) { 368 ssp_task = &task->ssp_task; 369 scsi_cmnd = ssp_task->cmd; 370 371 if (scsi_prot_sg_count(scsi_cmnd)) { 372 *n_elem_dif = dma_map_sg(dev, 373 scsi_prot_sglist(scsi_cmnd), 374 scsi_prot_sg_count(scsi_cmnd), 375 task->data_dir); 376 377 if (!*n_elem_dif) 378 return -ENOMEM; 379 380 if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) { 381 dev_err(dev, "task prep: n_elem_dif(%d) too large\n", 382 *n_elem_dif); 383 rc = -EINVAL; 384 goto err_out_dif_dma_unmap; 385 } 386 } 387 } 388 389 return 0; 390 391 err_out_dif_dma_unmap: 392 dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd), 393 scsi_prot_sg_count(scsi_cmnd), task->data_dir); 394 return rc; 395 } 396 397 static 398 void hisi_sas_task_deliver(struct hisi_hba *hisi_hba, 399 struct hisi_sas_slot *slot, 400 struct hisi_sas_dq *dq, 401 struct hisi_sas_device *sas_dev) 402 { 403 struct hisi_sas_cmd_hdr *cmd_hdr_base; 404 int dlvry_queue_slot, dlvry_queue; 405 struct sas_task *task = slot->task; 406 int wr_q_index; 407 408 spin_lock(&dq->lock); 409 wr_q_index = dq->wr_point; 410 dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS; 411 list_add_tail(&slot->delivery, &dq->list); 412 spin_unlock(&dq->lock); 413 spin_lock(&sas_dev->lock); 414 list_add_tail(&slot->entry, &sas_dev->list); 415 spin_unlock(&sas_dev->lock); 416 417 dlvry_queue = dq->id; 418 dlvry_queue_slot = wr_q_index; 419 420 slot->device_id = sas_dev->device_id; 421 slot->dlvry_queue = dlvry_queue; 422 slot->dlvry_queue_slot = dlvry_queue_slot; 423 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue]; 424 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot]; 425 426 task->lldd_task = slot; 427 428 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr)); 429 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ); 430 memset(hisi_sas_status_buf_addr_mem(slot), 0, 431 sizeof(struct hisi_sas_err_record)); 432 433 switch (task->task_proto) { 434 case SAS_PROTOCOL_SMP: 435 hisi_sas_task_prep_smp(hisi_hba, slot); 436 break; 437 case SAS_PROTOCOL_SSP: 438 hisi_sas_task_prep_ssp(hisi_hba, slot); 439 break; 440 case SAS_PROTOCOL_SATA: 441 case SAS_PROTOCOL_STP: 442 case SAS_PROTOCOL_STP_ALL: 443 hisi_sas_task_prep_ata(hisi_hba, slot); 444 break; 445 case SAS_PROTOCOL_INTERNAL_ABORT: 446 hisi_sas_task_prep_abort(hisi_hba, slot); 447 break; 448 default: 449 return; 450 } 451 452 /* Make slot memories observable before marking as ready */ 453 smp_wmb(); 454 WRITE_ONCE(slot->ready, 1); 455 456 spin_lock(&dq->lock); 457 hisi_hba->hw->start_delivery(dq); 458 spin_unlock(&dq->lock); 459 } 460 461 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) 462 { 463 int n_elem = 0, n_elem_dif = 0; 464 struct domain_device *device = task->dev; 465 struct asd_sas_port *sas_port = device->port; 466 struct hisi_sas_device *sas_dev = device->lldd_dev; 467 bool internal_abort = sas_is_internal_abort(task); 468 struct hisi_sas_dq *dq = NULL; 469 struct hisi_sas_port *port; 470 struct hisi_hba *hisi_hba; 471 struct hisi_sas_slot *slot; 472 struct request *rq = NULL; 473 struct device *dev; 474 int rc; 475 476 if (!sas_port) { 477 struct task_status_struct *ts = &task->task_status; 478 479 ts->resp = SAS_TASK_UNDELIVERED; 480 ts->stat = SAS_PHY_DOWN; 481 /* 482 * libsas will use dev->port, should 483 * not call task_done for sata 484 */ 485 if (device->dev_type != SAS_SATA_DEV && !internal_abort) 486 task->task_done(task); 487 return -ECOMM; 488 } 489 490 hisi_hba = dev_to_hisi_hba(device); 491 dev = hisi_hba->dev; 492 493 switch (task->task_proto) { 494 case SAS_PROTOCOL_SSP: 495 case SAS_PROTOCOL_SMP: 496 case SAS_PROTOCOL_SATA: 497 case SAS_PROTOCOL_STP: 498 case SAS_PROTOCOL_STP_ALL: 499 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) { 500 if (!gfpflags_allow_blocking(gfp_flags)) 501 return -EINVAL; 502 503 down(&hisi_hba->sem); 504 up(&hisi_hba->sem); 505 } 506 507 if (DEV_IS_GONE(sas_dev)) { 508 if (sas_dev) 509 dev_info(dev, "task prep: device %d not ready\n", 510 sas_dev->device_id); 511 else 512 dev_info(dev, "task prep: device %016llx not ready\n", 513 SAS_ADDR(device->sas_addr)); 514 515 return -ECOMM; 516 } 517 518 port = to_hisi_sas_port(sas_port); 519 if (!port->port_attached) { 520 dev_info(dev, "task prep: %s port%d not attach device\n", 521 dev_is_sata(device) ? "SATA/STP" : "SAS", 522 device->port->id); 523 524 return -ECOMM; 525 } 526 527 rq = sas_task_find_rq(task); 528 if (rq) { 529 unsigned int dq_index; 530 u32 blk_tag; 531 532 blk_tag = blk_mq_unique_tag(rq); 533 dq_index = blk_mq_unique_tag_to_hwq(blk_tag); 534 dq = &hisi_hba->dq[dq_index]; 535 } else { 536 int queue; 537 538 if (hisi_hba->iopoll_q_cnt) { 539 /* 540 * Use interrupt queue (queue 0) to deliver and complete 541 * internal IOs of libsas or libata when there is at least 542 * one iopoll queue 543 */ 544 queue = 0; 545 } else { 546 struct Scsi_Host *shost = hisi_hba->shost; 547 struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT]; 548 549 queue = qmap->mq_map[raw_smp_processor_id()]; 550 } 551 dq = &hisi_hba->dq[queue]; 552 } 553 break; 554 case SAS_PROTOCOL_INTERNAL_ABORT: 555 if (!hisi_hba->hw->prep_abort) 556 return TMF_RESP_FUNC_FAILED; 557 558 if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags)) 559 return -EIO; 560 561 hisi_hba = dev_to_hisi_hba(device); 562 563 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) 564 return -EINVAL; 565 566 port = to_hisi_sas_port(sas_port); 567 dq = &hisi_hba->dq[task->abort_task.qid]; 568 break; 569 default: 570 dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n", 571 task->task_proto); 572 return -EINVAL; 573 } 574 575 rc = hisi_sas_dma_map(hisi_hba, task, &n_elem); 576 if (rc < 0) 577 goto prep_out; 578 579 if (!sas_protocol_ata(task->task_proto)) { 580 rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task); 581 if (rc < 0) 582 goto err_out_dma_unmap; 583 } 584 585 if (!internal_abort && hisi_hba->hw->slot_index_alloc) 586 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device); 587 else 588 rc = hisi_sas_slot_index_alloc(hisi_hba, rq); 589 590 if (rc < 0) 591 goto err_out_dif_dma_unmap; 592 593 slot = &hisi_hba->slot_info[rc]; 594 slot->n_elem = n_elem; 595 slot->n_elem_dif = n_elem_dif; 596 slot->task = task; 597 slot->port = port; 598 599 slot->tmf = task->tmf; 600 slot->is_internal = !!task->tmf || internal_abort; 601 602 /* protect task_prep and start_delivery sequence */ 603 hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev); 604 605 return 0; 606 607 err_out_dif_dma_unmap: 608 if (!sas_protocol_ata(task->task_proto)) 609 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif); 610 err_out_dma_unmap: 611 hisi_sas_dma_unmap(hisi_hba, task, n_elem); 612 prep_out: 613 dev_err(dev, "task exec: failed[%d]!\n", rc); 614 return rc; 615 } 616 617 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no, 618 gfp_t gfp_flags) 619 { 620 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 621 struct asd_sas_phy *sas_phy = &phy->sas_phy; 622 623 if (!phy->phy_attached) 624 return; 625 626 sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags); 627 628 if (sas_phy->phy) { 629 struct sas_phy *sphy = sas_phy->phy; 630 631 sphy->negotiated_linkrate = sas_phy->linkrate; 632 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS; 633 sphy->maximum_linkrate_hw = 634 hisi_hba->hw->phy_get_max_linkrate(); 635 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) 636 sphy->minimum_linkrate = phy->minimum_linkrate; 637 638 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) 639 sphy->maximum_linkrate = phy->maximum_linkrate; 640 } 641 642 if (phy->phy_type & PORT_TYPE_SAS) { 643 struct sas_identify_frame *id; 644 645 id = (struct sas_identify_frame *)phy->frame_rcvd; 646 id->dev_type = phy->identify.device_type; 647 id->initiator_bits = SAS_PROTOCOL_ALL; 648 id->target_bits = phy->identify.target_port_protocols; 649 } else if (phy->phy_type & PORT_TYPE_SATA) { 650 /* Nothing */ 651 } 652 653 sas_phy->frame_rcvd_size = phy->frame_rcvd_size; 654 sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags); 655 } 656 657 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) 658 { 659 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 660 struct hisi_sas_device *sas_dev = NULL; 661 int last = hisi_hba->last_dev_id; 662 int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES; 663 int i; 664 665 spin_lock(&hisi_hba->lock); 666 for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) { 667 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) { 668 int queue = i % hisi_hba->queue_count; 669 struct hisi_sas_dq *dq = &hisi_hba->dq[queue]; 670 671 hisi_hba->devices[i].device_id = i; 672 sas_dev = &hisi_hba->devices[i]; 673 sas_dev->dev_status = HISI_SAS_DEV_INIT; 674 sas_dev->dev_type = device->dev_type; 675 sas_dev->hisi_hba = hisi_hba; 676 sas_dev->sas_device = device; 677 sas_dev->dq = dq; 678 spin_lock_init(&sas_dev->lock); 679 INIT_LIST_HEAD(&hisi_hba->devices[i].list); 680 break; 681 } 682 i++; 683 } 684 hisi_hba->last_dev_id = i; 685 spin_unlock(&hisi_hba->lock); 686 687 return sas_dev; 688 } 689 690 static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq) 691 { 692 /* make sure CQ entries being processed are processed to completion */ 693 spin_lock(&cq->poll_lock); 694 spin_unlock(&cq->poll_lock); 695 } 696 697 static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq) 698 { 699 struct hisi_hba *hisi_hba = cq->hisi_hba; 700 701 if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt) 702 return false; 703 return true; 704 } 705 706 static void hisi_sas_sync_cq(struct hisi_sas_cq *cq) 707 { 708 if (hisi_sas_queue_is_poll(cq)) 709 hisi_sas_sync_poll_cq(cq); 710 else 711 synchronize_irq(cq->irq_no); 712 } 713 714 void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba) 715 { 716 int i; 717 718 for (i = 0; i < hisi_hba->queue_count; i++) { 719 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 720 721 if (hisi_sas_queue_is_poll(cq)) 722 hisi_sas_sync_poll_cq(cq); 723 } 724 } 725 EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs); 726 727 void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba) 728 { 729 int i; 730 731 for (i = 0; i < hisi_hba->queue_count; i++) { 732 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 733 734 hisi_sas_sync_cq(cq); 735 } 736 } 737 EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs); 738 739 static void hisi_sas_tmf_aborted(struct sas_task *task) 740 { 741 struct hisi_sas_slot *slot = task->lldd_task; 742 struct domain_device *device = task->dev; 743 struct hisi_sas_device *sas_dev = device->lldd_dev; 744 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 745 746 if (slot) { 747 struct hisi_sas_cq *cq = 748 &hisi_hba->cq[slot->dlvry_queue]; 749 /* 750 * sync irq or poll queue to avoid free'ing task 751 * before using task in IO completion 752 */ 753 hisi_sas_sync_cq(cq); 754 slot->task = NULL; 755 } 756 } 757 758 #define HISI_SAS_DISK_RECOVER_CNT 3 759 static int hisi_sas_init_device(struct domain_device *device) 760 { 761 int rc = TMF_RESP_FUNC_COMPLETE; 762 struct scsi_lun lun; 763 int retry = HISI_SAS_DISK_RECOVER_CNT; 764 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 765 766 switch (device->dev_type) { 767 case SAS_END_DEVICE: 768 int_to_scsilun(0, &lun); 769 770 while (retry-- > 0) { 771 rc = sas_abort_task_set(device, lun.scsi_lun); 772 if (rc == TMF_RESP_FUNC_COMPLETE) { 773 hisi_sas_release_task(hisi_hba, device); 774 break; 775 } 776 } 777 break; 778 case SAS_SATA_DEV: 779 case SAS_SATA_PM: 780 case SAS_SATA_PM_PORT: 781 case SAS_SATA_PENDING: 782 /* 783 * If an expander is swapped when a SATA disk is attached then 784 * we should issue a hard reset to clear previous affiliation 785 * of STP target port, see SPL (chapter 6.19.4). 786 * 787 * However we don't need to issue a hard reset here for these 788 * reasons: 789 * a. When probing the device, libsas/libata already issues a 790 * hard reset in sas_probe_sata() -> ata_port_probe(). 791 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care 792 * to issue a hard reset by checking the dev status (== INIT). 793 * b. When resetting the controller, this is simply unnecessary. 794 */ 795 while (retry-- > 0) { 796 rc = hisi_sas_softreset_ata_disk(device); 797 if (!rc) 798 break; 799 } 800 break; 801 default: 802 break; 803 } 804 805 return rc; 806 } 807 808 int hisi_sas_slave_alloc(struct scsi_device *sdev) 809 { 810 struct domain_device *ddev = sdev_to_domain_dev(sdev); 811 struct hisi_sas_device *sas_dev = ddev->lldd_dev; 812 int rc; 813 814 rc = sas_slave_alloc(sdev); 815 if (rc) 816 return rc; 817 818 rc = hisi_sas_init_device(ddev); 819 if (rc) 820 return rc; 821 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 822 return 0; 823 } 824 EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc); 825 826 static int hisi_sas_dev_found(struct domain_device *device) 827 { 828 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 829 struct domain_device *parent_dev = device->parent; 830 struct hisi_sas_device *sas_dev; 831 struct device *dev = hisi_hba->dev; 832 int rc; 833 834 if (hisi_hba->hw->alloc_dev) 835 sas_dev = hisi_hba->hw->alloc_dev(device); 836 else 837 sas_dev = hisi_sas_alloc_dev(device); 838 if (!sas_dev) { 839 dev_err(dev, "fail alloc dev: max support %d devices\n", 840 HISI_SAS_MAX_DEVICES); 841 return -EINVAL; 842 } 843 844 device->lldd_dev = sas_dev; 845 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 846 847 if (parent_dev && dev_is_expander(parent_dev->dev_type)) { 848 int phy_no; 849 850 phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device); 851 if (phy_no < 0) { 852 dev_info(dev, "dev found: no attached " 853 "dev:%016llx at ex:%016llx\n", 854 SAS_ADDR(device->sas_addr), 855 SAS_ADDR(parent_dev->sas_addr)); 856 rc = phy_no; 857 goto err_out; 858 } 859 } 860 861 dev_info(dev, "dev[%d:%x] found\n", 862 sas_dev->device_id, sas_dev->dev_type); 863 864 return 0; 865 866 err_out: 867 hisi_sas_dev_gone(device); 868 return rc; 869 } 870 871 int hisi_sas_slave_configure(struct scsi_device *sdev) 872 { 873 struct domain_device *dev = sdev_to_domain_dev(sdev); 874 int ret = sas_slave_configure(sdev); 875 876 if (ret) 877 return ret; 878 if (!dev_is_sata(dev)) 879 sas_change_queue_depth(sdev, 64); 880 881 return 0; 882 } 883 EXPORT_SYMBOL_GPL(hisi_sas_slave_configure); 884 885 void hisi_sas_scan_start(struct Scsi_Host *shost) 886 { 887 struct hisi_hba *hisi_hba = shost_priv(shost); 888 889 hisi_hba->hw->phys_init(hisi_hba); 890 } 891 EXPORT_SYMBOL_GPL(hisi_sas_scan_start); 892 893 int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time) 894 { 895 struct hisi_hba *hisi_hba = shost_priv(shost); 896 struct sas_ha_struct *sha = &hisi_hba->sha; 897 898 /* Wait for PHY up interrupt to occur */ 899 if (time < HZ) 900 return 0; 901 902 sas_drain_work(sha); 903 return 1; 904 } 905 EXPORT_SYMBOL_GPL(hisi_sas_scan_finished); 906 907 static void hisi_sas_phyup_work_common(struct work_struct *work, 908 enum hisi_sas_phy_event event) 909 { 910 struct hisi_sas_phy *phy = 911 container_of(work, typeof(*phy), works[event]); 912 struct hisi_hba *hisi_hba = phy->hisi_hba; 913 struct asd_sas_phy *sas_phy = &phy->sas_phy; 914 int phy_no = sas_phy->id; 915 916 phy->wait_phyup_cnt = 0; 917 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP) 918 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no); 919 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL); 920 } 921 922 static void hisi_sas_phyup_work(struct work_struct *work) 923 { 924 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP); 925 } 926 927 static void hisi_sas_linkreset_work(struct work_struct *work) 928 { 929 struct hisi_sas_phy *phy = 930 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]); 931 struct asd_sas_phy *sas_phy = &phy->sas_phy; 932 933 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL); 934 } 935 936 static void hisi_sas_phyup_pm_work(struct work_struct *work) 937 { 938 struct hisi_sas_phy *phy = 939 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]); 940 struct hisi_hba *hisi_hba = phy->hisi_hba; 941 struct device *dev = hisi_hba->dev; 942 943 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM); 944 pm_runtime_put_sync(dev); 945 } 946 947 static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = { 948 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work, 949 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work, 950 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work, 951 }; 952 953 bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy, 954 enum hisi_sas_phy_event event) 955 { 956 struct hisi_hba *hisi_hba = phy->hisi_hba; 957 958 if (WARN_ON(event >= HISI_PHYES_NUM)) 959 return false; 960 961 return queue_work(hisi_hba->wq, &phy->works[event]); 962 } 963 EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event); 964 965 static void hisi_sas_wait_phyup_timedout(struct timer_list *t) 966 { 967 struct hisi_sas_phy *phy = from_timer(phy, t, timer); 968 struct hisi_hba *hisi_hba = phy->hisi_hba; 969 struct device *dev = hisi_hba->dev; 970 int phy_no = phy->sas_phy.id; 971 972 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no); 973 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET); 974 } 975 976 #define HISI_SAS_WAIT_PHYUP_RETRIES 10 977 978 void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no) 979 { 980 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 981 struct device *dev = hisi_hba->dev; 982 unsigned long flags; 983 984 dev_dbg(dev, "phy%d OOB ready\n", phy_no); 985 spin_lock_irqsave(&phy->lock, flags); 986 if (phy->phy_attached) { 987 spin_unlock_irqrestore(&phy->lock, flags); 988 return; 989 } 990 991 if (!timer_pending(&phy->timer)) { 992 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) { 993 phy->wait_phyup_cnt++; 994 phy->timer.expires = jiffies + 995 HISI_SAS_WAIT_PHYUP_TIMEOUT; 996 add_timer(&phy->timer); 997 spin_unlock_irqrestore(&phy->lock, flags); 998 return; 999 } 1000 1001 dev_warn(dev, "phy%d failed to come up %d times, giving up\n", 1002 phy_no, phy->wait_phyup_cnt); 1003 phy->wait_phyup_cnt = 0; 1004 } 1005 spin_unlock_irqrestore(&phy->lock, flags); 1006 } 1007 1008 EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready); 1009 1010 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) 1011 { 1012 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1013 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1014 int i; 1015 1016 phy->hisi_hba = hisi_hba; 1017 phy->port = NULL; 1018 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS; 1019 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate(); 1020 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0; 1021 sas_phy->iproto = SAS_PROTOCOL_ALL; 1022 sas_phy->tproto = 0; 1023 sas_phy->role = PHY_ROLE_INITIATOR; 1024 sas_phy->oob_mode = OOB_NOT_CONNECTED; 1025 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN; 1026 sas_phy->id = phy_no; 1027 sas_phy->sas_addr = &hisi_hba->sas_addr[0]; 1028 sas_phy->frame_rcvd = &phy->frame_rcvd[0]; 1029 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata; 1030 sas_phy->lldd_phy = phy; 1031 1032 for (i = 0; i < HISI_PHYES_NUM; i++) 1033 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]); 1034 1035 spin_lock_init(&phy->lock); 1036 1037 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0); 1038 } 1039 1040 /* Wrapper to ensure we track hisi_sas_phy.enable properly */ 1041 void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable) 1042 { 1043 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1044 struct asd_sas_phy *aphy = &phy->sas_phy; 1045 struct sas_phy *sphy = aphy->phy; 1046 unsigned long flags; 1047 1048 spin_lock_irqsave(&phy->lock, flags); 1049 1050 if (enable) { 1051 /* We may have been enabled already; if so, don't touch */ 1052 if (!phy->enable) 1053 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 1054 hisi_hba->hw->phy_start(hisi_hba, phy_no); 1055 } else { 1056 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 1057 hisi_hba->hw->phy_disable(hisi_hba, phy_no); 1058 } 1059 phy->enable = enable; 1060 spin_unlock_irqrestore(&phy->lock, flags); 1061 } 1062 EXPORT_SYMBOL_GPL(hisi_sas_phy_enable); 1063 1064 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) 1065 { 1066 struct hisi_sas_phy *phy = sas_phy->lldd_phy; 1067 struct asd_sas_port *sas_port = sas_phy->port; 1068 struct hisi_sas_port *port; 1069 1070 if (!sas_port) 1071 return; 1072 1073 port = to_hisi_sas_port(sas_port); 1074 port->port_attached = 1; 1075 port->id = phy->port_id; 1076 phy->port = port; 1077 sas_port->lldd_port = port; 1078 } 1079 1080 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task, 1081 struct hisi_sas_slot *slot, bool need_lock) 1082 { 1083 if (task) { 1084 unsigned long flags; 1085 struct task_status_struct *ts; 1086 1087 ts = &task->task_status; 1088 1089 ts->resp = SAS_TASK_COMPLETE; 1090 ts->stat = SAS_ABORTED_TASK; 1091 spin_lock_irqsave(&task->task_state_lock, flags); 1092 task->task_state_flags &= ~SAS_TASK_STATE_PENDING; 1093 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP) 1094 task->task_state_flags |= SAS_TASK_STATE_DONE; 1095 spin_unlock_irqrestore(&task->task_state_lock, flags); 1096 } 1097 1098 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock); 1099 } 1100 1101 static void hisi_sas_release_task(struct hisi_hba *hisi_hba, 1102 struct domain_device *device) 1103 { 1104 struct hisi_sas_slot *slot, *slot2; 1105 struct hisi_sas_device *sas_dev = device->lldd_dev; 1106 1107 spin_lock(&sas_dev->lock); 1108 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry) 1109 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false); 1110 1111 spin_unlock(&sas_dev->lock); 1112 } 1113 1114 void hisi_sas_release_tasks(struct hisi_hba *hisi_hba) 1115 { 1116 struct hisi_sas_device *sas_dev; 1117 struct domain_device *device; 1118 int i; 1119 1120 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1121 sas_dev = &hisi_hba->devices[i]; 1122 device = sas_dev->sas_device; 1123 1124 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || 1125 !device) 1126 continue; 1127 1128 hisi_sas_release_task(hisi_hba, device); 1129 } 1130 } 1131 EXPORT_SYMBOL_GPL(hisi_sas_release_tasks); 1132 1133 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba, 1134 struct domain_device *device) 1135 { 1136 if (hisi_hba->hw->dereg_device) 1137 hisi_hba->hw->dereg_device(hisi_hba, device); 1138 } 1139 1140 static int 1141 hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev, 1142 bool rst_ha_timeout) 1143 { 1144 struct hisi_sas_internal_abort_data data = { rst_ha_timeout }; 1145 struct domain_device *device = sas_dev->sas_device; 1146 struct hisi_hba *hisi_hba = sas_dev->hisi_hba; 1147 int i, rc; 1148 1149 for (i = 0; i < hisi_hba->cq_nvecs; i++) { 1150 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 1151 const struct cpumask *mask = cq->irq_mask; 1152 1153 if (mask && !cpumask_intersects(cpu_online_mask, mask)) 1154 continue; 1155 rc = sas_execute_internal_abort_dev(device, i, &data); 1156 if (rc) 1157 return rc; 1158 } 1159 1160 return 0; 1161 } 1162 1163 static void hisi_sas_dev_gone(struct domain_device *device) 1164 { 1165 struct hisi_sas_device *sas_dev = device->lldd_dev; 1166 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1167 struct device *dev = hisi_hba->dev; 1168 int ret = 0; 1169 1170 dev_info(dev, "dev[%d:%x] is gone\n", 1171 sas_dev->device_id, sas_dev->dev_type); 1172 1173 down(&hisi_hba->sem); 1174 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) { 1175 hisi_sas_internal_task_abort_dev(sas_dev, true); 1176 1177 hisi_sas_dereg_device(hisi_hba, device); 1178 1179 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev); 1180 device->lldd_dev = NULL; 1181 } 1182 1183 if (hisi_hba->hw->free_device) 1184 hisi_hba->hw->free_device(sas_dev); 1185 1186 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */ 1187 if (!ret) 1188 sas_dev->dev_type = SAS_PHY_UNUSED; 1189 sas_dev->sas_device = NULL; 1190 up(&hisi_hba->sem); 1191 } 1192 1193 static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no, 1194 struct sas_phy_linkrates *r) 1195 { 1196 struct sas_phy_linkrates _r; 1197 1198 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1199 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1200 enum sas_linkrate min, max; 1201 1202 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS) 1203 return -EINVAL; 1204 1205 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) { 1206 max = sas_phy->phy->maximum_linkrate; 1207 min = r->minimum_linkrate; 1208 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) { 1209 max = r->maximum_linkrate; 1210 min = sas_phy->phy->minimum_linkrate; 1211 } else 1212 return -EINVAL; 1213 1214 _r.maximum_linkrate = max; 1215 _r.minimum_linkrate = min; 1216 1217 sas_phy->phy->maximum_linkrate = max; 1218 sas_phy->phy->minimum_linkrate = min; 1219 1220 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1221 msleep(100); 1222 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r); 1223 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1224 1225 return 0; 1226 } 1227 1228 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, 1229 void *funcdata) 1230 { 1231 struct hisi_sas_phy *phy = container_of(sas_phy, 1232 struct hisi_sas_phy, sas_phy); 1233 struct sas_ha_struct *sas_ha = sas_phy->ha; 1234 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1235 struct device *dev = hisi_hba->dev; 1236 DECLARE_COMPLETION_ONSTACK(completion); 1237 int phy_no = sas_phy->id; 1238 u8 sts = phy->phy_attached; 1239 int ret = 0; 1240 1241 down(&hisi_hba->sem); 1242 phy->reset_completion = &completion; 1243 1244 switch (func) { 1245 case PHY_FUNC_HARD_RESET: 1246 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no); 1247 break; 1248 1249 case PHY_FUNC_LINK_RESET: 1250 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1251 msleep(100); 1252 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1253 break; 1254 1255 case PHY_FUNC_DISABLE: 1256 hisi_sas_phy_enable(hisi_hba, phy_no, 0); 1257 goto out; 1258 1259 case PHY_FUNC_SET_LINK_RATE: 1260 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata); 1261 break; 1262 1263 case PHY_FUNC_GET_EVENTS: 1264 if (hisi_hba->hw->get_events) { 1265 hisi_hba->hw->get_events(hisi_hba, phy_no); 1266 goto out; 1267 } 1268 fallthrough; 1269 case PHY_FUNC_RELEASE_SPINUP_HOLD: 1270 default: 1271 ret = -EOPNOTSUPP; 1272 goto out; 1273 } 1274 1275 if (sts && !wait_for_completion_timeout(&completion, 1276 HISI_SAS_WAIT_PHYUP_TIMEOUT)) { 1277 dev_warn(dev, "phy%d wait phyup timed out for func %d\n", 1278 phy_no, func); 1279 if (phy->in_reset) 1280 ret = -ETIMEDOUT; 1281 } 1282 1283 out: 1284 phy->reset_completion = NULL; 1285 1286 up(&hisi_hba->sem); 1287 return ret; 1288 } 1289 1290 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev, 1291 bool reset, int pmp, u8 *fis) 1292 { 1293 struct ata_taskfile tf; 1294 1295 ata_tf_init(dev, &tf); 1296 if (reset) 1297 tf.ctl |= ATA_SRST; 1298 else 1299 tf.ctl &= ~ATA_SRST; 1300 tf.command = ATA_CMD_DEV_RESET; 1301 ata_tf_to_fis(&tf, pmp, 0, fis); 1302 } 1303 1304 static int hisi_sas_softreset_ata_disk(struct domain_device *device) 1305 { 1306 u8 fis[20] = {0}; 1307 struct ata_port *ap = device->sata_dev.ap; 1308 struct ata_link *link; 1309 int rc = TMF_RESP_FUNC_FAILED; 1310 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1311 struct device *dev = hisi_hba->dev; 1312 1313 ata_for_each_link(link, ap, EDGE) { 1314 int pmp = sata_srst_pmp(link); 1315 1316 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1317 rc = sas_execute_ata_cmd(device, fis, -1); 1318 if (rc != TMF_RESP_FUNC_COMPLETE) 1319 break; 1320 } 1321 1322 if (rc == TMF_RESP_FUNC_COMPLETE) { 1323 ata_for_each_link(link, ap, EDGE) { 1324 int pmp = sata_srst_pmp(link); 1325 1326 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis); 1327 rc = sas_execute_ata_cmd(device, fis, -1); 1328 if (rc != TMF_RESP_FUNC_COMPLETE) 1329 dev_err(dev, "ata disk %016llx de-reset failed\n", 1330 SAS_ADDR(device->sas_addr)); 1331 } 1332 } else { 1333 dev_err(dev, "ata disk %016llx reset failed\n", 1334 SAS_ADDR(device->sas_addr)); 1335 } 1336 1337 if (rc == TMF_RESP_FUNC_COMPLETE) 1338 hisi_sas_release_task(hisi_hba, device); 1339 1340 return rc; 1341 } 1342 1343 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba) 1344 { 1345 u32 state = hisi_hba->hw->get_phys_state(hisi_hba); 1346 int i; 1347 1348 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1349 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1350 struct domain_device *device = sas_dev->sas_device; 1351 struct asd_sas_port *sas_port; 1352 struct hisi_sas_port *port; 1353 struct hisi_sas_phy *phy = NULL; 1354 struct asd_sas_phy *sas_phy; 1355 1356 if ((sas_dev->dev_type == SAS_PHY_UNUSED) 1357 || !device || !device->port) 1358 continue; 1359 1360 sas_port = device->port; 1361 port = to_hisi_sas_port(sas_port); 1362 1363 spin_lock(&sas_port->phy_list_lock); 1364 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) 1365 if (state & BIT(sas_phy->id)) { 1366 phy = sas_phy->lldd_phy; 1367 break; 1368 } 1369 spin_unlock(&sas_port->phy_list_lock); 1370 1371 if (phy) { 1372 port->id = phy->port_id; 1373 1374 /* Update linkrate of directly attached device. */ 1375 if (!device->parent) 1376 device->linkrate = phy->sas_phy.linkrate; 1377 1378 hisi_hba->hw->setup_itct(hisi_hba, sas_dev); 1379 } else if (!port->port_attached) 1380 port->id = 0xff; 1381 } 1382 } 1383 1384 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state) 1385 { 1386 struct asd_sas_port *_sas_port = NULL; 1387 int phy_no; 1388 1389 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1390 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1391 struct asd_sas_phy *sas_phy = &phy->sas_phy; 1392 struct asd_sas_port *sas_port = sas_phy->port; 1393 bool do_port_check = _sas_port != sas_port; 1394 1395 if (!sas_phy->phy->enabled) 1396 continue; 1397 1398 /* Report PHY state change to libsas */ 1399 if (state & BIT(phy_no)) { 1400 if (do_port_check && sas_port && sas_port->port_dev) { 1401 struct domain_device *dev = sas_port->port_dev; 1402 1403 _sas_port = sas_port; 1404 1405 if (dev_is_expander(dev->dev_type)) 1406 sas_notify_port_event(sas_phy, 1407 PORTE_BROADCAST_RCVD, 1408 GFP_KERNEL); 1409 } 1410 } else { 1411 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL); 1412 } 1413 } 1414 } 1415 1416 static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba) 1417 { 1418 struct hisi_sas_device *sas_dev; 1419 struct domain_device *device; 1420 int i; 1421 1422 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1423 sas_dev = &hisi_hba->devices[i]; 1424 device = sas_dev->sas_device; 1425 1426 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1427 continue; 1428 1429 hisi_sas_init_device(device); 1430 } 1431 } 1432 1433 static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba, 1434 struct asd_sas_port *sas_port, 1435 struct domain_device *device) 1436 { 1437 struct ata_port *ap = device->sata_dev.ap; 1438 struct device *dev = hisi_hba->dev; 1439 int rc = TMF_RESP_FUNC_FAILED; 1440 struct ata_link *link; 1441 u8 fis[20] = {0}; 1442 int i; 1443 1444 for (i = 0; i < hisi_hba->n_phy; i++) { 1445 if (!(sas_port->phy_mask & BIT(i))) 1446 continue; 1447 1448 ata_for_each_link(link, ap, EDGE) { 1449 int pmp = sata_srst_pmp(link); 1450 1451 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis); 1452 rc = sas_execute_ata_cmd(device, fis, i); 1453 if (rc != TMF_RESP_FUNC_COMPLETE) { 1454 dev_err(dev, "phy%d ata reset failed rc=%d\n", 1455 i, rc); 1456 break; 1457 } 1458 } 1459 } 1460 } 1461 1462 static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba) 1463 { 1464 struct device *dev = hisi_hba->dev; 1465 int port_no, rc, i; 1466 1467 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1468 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1469 struct domain_device *device = sas_dev->sas_device; 1470 1471 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device) 1472 continue; 1473 1474 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1475 if (rc < 0) 1476 dev_err(dev, "STP reject: abort dev failed %d\n", rc); 1477 } 1478 1479 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) { 1480 struct hisi_sas_port *port = &hisi_hba->port[port_no]; 1481 struct asd_sas_port *sas_port = &port->sas_port; 1482 struct domain_device *port_dev = sas_port->port_dev; 1483 struct domain_device *device; 1484 1485 if (!port_dev || !dev_is_expander(port_dev->dev_type)) 1486 continue; 1487 1488 /* Try to find a SATA device */ 1489 list_for_each_entry(device, &sas_port->dev_list, 1490 dev_list_node) { 1491 if (dev_is_sata(device)) { 1492 hisi_sas_send_ata_reset_each_phy(hisi_hba, 1493 sas_port, 1494 device); 1495 break; 1496 } 1497 } 1498 } 1499 } 1500 1501 void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba) 1502 { 1503 struct Scsi_Host *shost = hisi_hba->shost; 1504 1505 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba); 1506 1507 scsi_block_requests(shost); 1508 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000); 1509 1510 del_timer_sync(&hisi_hba->timer); 1511 1512 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1513 } 1514 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare); 1515 1516 static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie) 1517 { 1518 struct hisi_sas_phy *phy = data; 1519 struct hisi_hba *hisi_hba = phy->hisi_hba; 1520 struct device *dev = hisi_hba->dev; 1521 DECLARE_COMPLETION_ONSTACK(completion); 1522 int phy_no = phy->sas_phy.id; 1523 1524 phy->reset_completion = &completion; 1525 hisi_sas_phy_enable(hisi_hba, phy_no, 1); 1526 if (!wait_for_completion_timeout(&completion, 1527 HISI_SAS_WAIT_PHYUP_TIMEOUT)) 1528 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no); 1529 1530 phy->reset_completion = NULL; 1531 } 1532 1533 void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba) 1534 { 1535 struct Scsi_Host *shost = hisi_hba->shost; 1536 ASYNC_DOMAIN_EXCLUSIVE(async); 1537 int phy_no; 1538 1539 /* Init and wait for PHYs to come up and all libsas event finished. */ 1540 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) { 1541 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 1542 1543 if (!(hisi_hba->phy_state & BIT(phy_no))) 1544 continue; 1545 1546 async_schedule_domain(hisi_sas_async_init_wait_phyup, 1547 phy, &async); 1548 } 1549 1550 async_synchronize_full_domain(&async); 1551 hisi_sas_refresh_port_id(hisi_hba); 1552 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1553 1554 if (hisi_hba->reject_stp_links_msk) 1555 hisi_sas_terminate_stp_reject(hisi_hba); 1556 hisi_sas_reset_init_all_devices(hisi_hba); 1557 scsi_unblock_requests(shost); 1558 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags); 1559 up(&hisi_hba->sem); 1560 1561 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state); 1562 } 1563 EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done); 1564 1565 static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba) 1566 { 1567 if (!hisi_hba->hw->soft_reset) 1568 return -ENOENT; 1569 1570 down(&hisi_hba->sem); 1571 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) { 1572 up(&hisi_hba->sem); 1573 return -EPERM; 1574 } 1575 1576 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) 1577 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); 1578 1579 return 0; 1580 } 1581 1582 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba) 1583 { 1584 struct device *dev = hisi_hba->dev; 1585 struct Scsi_Host *shost = hisi_hba->shost; 1586 int rc; 1587 1588 dev_info(dev, "controller resetting...\n"); 1589 hisi_sas_controller_reset_prepare(hisi_hba); 1590 1591 rc = hisi_hba->hw->soft_reset(hisi_hba); 1592 if (rc) { 1593 dev_warn(dev, "controller reset failed (%d)\n", rc); 1594 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); 1595 up(&hisi_hba->sem); 1596 scsi_unblock_requests(shost); 1597 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags); 1598 return rc; 1599 } 1600 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags); 1601 1602 hisi_sas_controller_reset_done(hisi_hba); 1603 dev_info(dev, "controller reset complete\n"); 1604 1605 return 0; 1606 } 1607 1608 static int hisi_sas_abort_task(struct sas_task *task) 1609 { 1610 struct hisi_sas_internal_abort_data internal_abort_data = { false }; 1611 struct domain_device *device = task->dev; 1612 struct hisi_sas_device *sas_dev = device->lldd_dev; 1613 struct hisi_sas_slot *slot = task->lldd_task; 1614 struct hisi_hba *hisi_hba; 1615 struct device *dev; 1616 int rc = TMF_RESP_FUNC_FAILED; 1617 unsigned long flags; 1618 1619 if (!sas_dev) 1620 return TMF_RESP_FUNC_FAILED; 1621 1622 hisi_hba = dev_to_hisi_hba(task->dev); 1623 dev = hisi_hba->dev; 1624 1625 spin_lock_irqsave(&task->task_state_lock, flags); 1626 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1627 struct hisi_sas_cq *cq; 1628 1629 if (slot) { 1630 /* 1631 * sync irq or poll queue to avoid free'ing task 1632 * before using task in IO completion 1633 */ 1634 cq = &hisi_hba->cq[slot->dlvry_queue]; 1635 hisi_sas_sync_cq(cq); 1636 } 1637 spin_unlock_irqrestore(&task->task_state_lock, flags); 1638 rc = TMF_RESP_FUNC_COMPLETE; 1639 goto out; 1640 } 1641 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 1642 spin_unlock_irqrestore(&task->task_state_lock, flags); 1643 1644 if (!slot) 1645 goto out; 1646 1647 if (task->task_proto & SAS_PROTOCOL_SSP) { 1648 u16 tag = slot->idx; 1649 int rc2; 1650 1651 rc = sas_abort_task(task, tag); 1652 rc2 = sas_execute_internal_abort_single(device, tag, 1653 slot->dlvry_queue, &internal_abort_data); 1654 if (rc2 < 0) { 1655 dev_err(dev, "abort task: internal abort (%d)\n", rc2); 1656 return TMF_RESP_FUNC_FAILED; 1657 } 1658 1659 /* 1660 * If the TMF finds that the IO is not in the device and also 1661 * the internal abort does not succeed, then it is safe to 1662 * free the slot. 1663 * Note: if the internal abort succeeds then the slot 1664 * will have already been completed 1665 */ 1666 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) { 1667 if (task->lldd_task) 1668 hisi_sas_do_release_task(hisi_hba, task, slot, true); 1669 } 1670 } else if (task->task_proto & SAS_PROTOCOL_SATA || 1671 task->task_proto & SAS_PROTOCOL_STP) { 1672 if (task->dev->dev_type == SAS_SATA_DEV) { 1673 struct ata_queued_cmd *qc = task->uldd_task; 1674 1675 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1676 if (rc < 0) { 1677 dev_err(dev, "abort task: internal abort failed\n"); 1678 goto out; 1679 } 1680 hisi_sas_dereg_device(hisi_hba, device); 1681 1682 /* 1683 * If an ATA internal command times out in ATA EH, it 1684 * need to execute soft reset, so check the scsicmd 1685 */ 1686 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) && 1687 qc && qc->scsicmd) { 1688 hisi_sas_do_release_task(hisi_hba, task, slot, true); 1689 rc = TMF_RESP_FUNC_COMPLETE; 1690 } else { 1691 rc = hisi_sas_softreset_ata_disk(device); 1692 } 1693 } 1694 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 1695 /* SMP */ 1696 u32 tag = slot->idx; 1697 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue]; 1698 1699 rc = sas_execute_internal_abort_single(device, 1700 tag, slot->dlvry_queue, 1701 &internal_abort_data); 1702 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) && 1703 task->lldd_task) { 1704 /* 1705 * sync irq or poll queue to avoid free'ing task 1706 * before using task in IO completion 1707 */ 1708 hisi_sas_sync_cq(cq); 1709 slot->task = NULL; 1710 } 1711 } 1712 1713 out: 1714 if (rc != TMF_RESP_FUNC_COMPLETE) 1715 dev_notice(dev, "abort task: rc=%d\n", rc); 1716 return rc; 1717 } 1718 1719 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun) 1720 { 1721 struct hisi_sas_device *sas_dev = device->lldd_dev; 1722 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1723 struct device *dev = hisi_hba->dev; 1724 int rc; 1725 1726 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1727 if (rc < 0) { 1728 dev_err(dev, "abort task set: internal abort rc=%d\n", rc); 1729 return TMF_RESP_FUNC_FAILED; 1730 } 1731 hisi_sas_dereg_device(hisi_hba, device); 1732 1733 rc = sas_abort_task_set(device, lun); 1734 if (rc == TMF_RESP_FUNC_COMPLETE) 1735 hisi_sas_release_task(hisi_hba, device); 1736 1737 return rc; 1738 } 1739 1740 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) 1741 { 1742 struct sas_phy *local_phy = sas_get_local_phy(device); 1743 struct hisi_sas_device *sas_dev = device->lldd_dev; 1744 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1745 struct sas_ha_struct *sas_ha = &hisi_hba->sha; 1746 int rc, reset_type; 1747 1748 if (!local_phy->enabled) { 1749 sas_put_local_phy(local_phy); 1750 return -ENODEV; 1751 } 1752 1753 if (scsi_is_sas_phy_local(local_phy)) { 1754 struct asd_sas_phy *sas_phy = 1755 sas_ha->sas_phy[local_phy->number]; 1756 struct hisi_sas_phy *phy = 1757 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1758 unsigned long flags; 1759 1760 spin_lock_irqsave(&phy->lock, flags); 1761 phy->in_reset = 1; 1762 spin_unlock_irqrestore(&phy->lock, flags); 1763 } 1764 1765 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT || 1766 !dev_is_sata(device)) ? true : false; 1767 1768 rc = sas_phy_reset(local_phy, reset_type); 1769 sas_put_local_phy(local_phy); 1770 1771 if (scsi_is_sas_phy_local(local_phy)) { 1772 struct asd_sas_phy *sas_phy = 1773 sas_ha->sas_phy[local_phy->number]; 1774 struct hisi_sas_phy *phy = 1775 container_of(sas_phy, struct hisi_sas_phy, sas_phy); 1776 unsigned long flags; 1777 1778 spin_lock_irqsave(&phy->lock, flags); 1779 phy->in_reset = 0; 1780 spin_unlock_irqrestore(&phy->lock, flags); 1781 1782 /* report PHY down if timed out */ 1783 if (rc == -ETIMEDOUT) 1784 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL); 1785 return rc; 1786 } 1787 1788 /* Remote phy */ 1789 if (rc) 1790 return rc; 1791 1792 if (dev_is_sata(device)) { 1793 struct ata_link *link = &device->sata_dev.ap->link; 1794 1795 rc = ata_wait_after_reset(link, HISI_SAS_WAIT_PHYUP_TIMEOUT, 1796 smp_ata_check_ready_type); 1797 } else { 1798 msleep(2000); 1799 } 1800 1801 return rc; 1802 } 1803 1804 static int hisi_sas_I_T_nexus_reset(struct domain_device *device) 1805 { 1806 struct hisi_sas_device *sas_dev = device->lldd_dev; 1807 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1808 struct device *dev = hisi_hba->dev; 1809 int rc; 1810 1811 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) 1812 sas_dev->dev_status = HISI_SAS_DEV_NORMAL; 1813 1814 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1815 if (rc < 0) { 1816 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc); 1817 return TMF_RESP_FUNC_FAILED; 1818 } 1819 hisi_sas_dereg_device(hisi_hba, device); 1820 1821 rc = hisi_sas_debug_I_T_nexus_reset(device); 1822 if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) { 1823 struct sas_phy *local_phy; 1824 1825 rc = hisi_sas_softreset_ata_disk(device); 1826 switch (rc) { 1827 case -ECOMM: 1828 rc = -ENODEV; 1829 break; 1830 case TMF_RESP_FUNC_FAILED: 1831 case -EMSGSIZE: 1832 case -EIO: 1833 local_phy = sas_get_local_phy(device); 1834 rc = sas_phy_enable(local_phy, 0); 1835 if (!rc) { 1836 local_phy->enabled = 0; 1837 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n", 1838 SAS_ADDR(device->sas_addr), rc); 1839 rc = -ENODEV; 1840 } 1841 sas_put_local_phy(local_phy); 1842 break; 1843 default: 1844 break; 1845 } 1846 } 1847 1848 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) 1849 hisi_sas_release_task(hisi_hba, device); 1850 1851 return rc; 1852 } 1853 1854 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun) 1855 { 1856 struct hisi_sas_device *sas_dev = device->lldd_dev; 1857 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1858 struct device *dev = hisi_hba->dev; 1859 int rc = TMF_RESP_FUNC_FAILED; 1860 1861 /* Clear internal IO and then lu reset */ 1862 rc = hisi_sas_internal_task_abort_dev(sas_dev, false); 1863 if (rc < 0) { 1864 dev_err(dev, "lu_reset: internal abort failed\n"); 1865 goto out; 1866 } 1867 hisi_sas_dereg_device(hisi_hba, device); 1868 1869 if (dev_is_sata(device)) { 1870 struct sas_phy *phy; 1871 1872 phy = sas_get_local_phy(device); 1873 1874 rc = sas_phy_reset(phy, true); 1875 1876 if (rc == 0) 1877 hisi_sas_release_task(hisi_hba, device); 1878 sas_put_local_phy(phy); 1879 } else { 1880 rc = sas_lu_reset(device, lun); 1881 if (rc == TMF_RESP_FUNC_COMPLETE) 1882 hisi_sas_release_task(hisi_hba, device); 1883 } 1884 out: 1885 if (rc != TMF_RESP_FUNC_COMPLETE) 1886 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n", 1887 sas_dev->device_id, rc); 1888 return rc; 1889 } 1890 1891 static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie) 1892 { 1893 struct domain_device *device = data; 1894 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1895 int rc; 1896 1897 rc = hisi_sas_debug_I_T_nexus_reset(device); 1898 if (rc != TMF_RESP_FUNC_COMPLETE) 1899 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n", 1900 SAS_ADDR(device->sas_addr), rc); 1901 } 1902 1903 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha) 1904 { 1905 struct hisi_hba *hisi_hba = sas_ha->lldd_ha; 1906 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r); 1907 ASYNC_DOMAIN_EXCLUSIVE(async); 1908 int i; 1909 1910 queue_work(hisi_hba->wq, &r.work); 1911 wait_for_completion(r.completion); 1912 if (!r.done) 1913 return TMF_RESP_FUNC_FAILED; 1914 1915 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 1916 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i]; 1917 struct domain_device *device = sas_dev->sas_device; 1918 1919 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device || 1920 dev_is_expander(device->dev_type)) 1921 continue; 1922 1923 async_schedule_domain(hisi_sas_async_I_T_nexus_reset, 1924 device, &async); 1925 } 1926 1927 async_synchronize_full_domain(&async); 1928 hisi_sas_release_tasks(hisi_hba); 1929 1930 return TMF_RESP_FUNC_COMPLETE; 1931 } 1932 1933 static int hisi_sas_query_task(struct sas_task *task) 1934 { 1935 int rc = TMF_RESP_FUNC_FAILED; 1936 1937 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) { 1938 struct hisi_sas_slot *slot = task->lldd_task; 1939 u32 tag = slot->idx; 1940 1941 rc = sas_query_task(task, tag); 1942 switch (rc) { 1943 /* The task is still in Lun, release it then */ 1944 case TMF_RESP_FUNC_SUCC: 1945 /* The task is not in Lun or failed, reset the phy */ 1946 case TMF_RESP_FUNC_FAILED: 1947 case TMF_RESP_FUNC_COMPLETE: 1948 break; 1949 default: 1950 rc = TMF_RESP_FUNC_FAILED; 1951 break; 1952 } 1953 } 1954 return rc; 1955 } 1956 1957 static bool hisi_sas_internal_abort_timeout(struct sas_task *task, 1958 void *data) 1959 { 1960 struct domain_device *device = task->dev; 1961 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 1962 struct hisi_sas_internal_abort_data *timeout = data; 1963 1964 if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct[0].itct) { 1965 down(&hisi_hba->sem); 1966 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba); 1967 up(&hisi_hba->sem); 1968 } 1969 1970 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1971 pr_err("Internal abort: timeout %016llx\n", 1972 SAS_ADDR(device->sas_addr)); 1973 } else { 1974 struct hisi_sas_slot *slot = task->lldd_task; 1975 1976 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags); 1977 1978 if (slot) { 1979 struct hisi_sas_cq *cq = 1980 &hisi_hba->cq[slot->dlvry_queue]; 1981 /* 1982 * sync irq or poll queue to avoid free'ing task 1983 * before using task in IO completion 1984 */ 1985 hisi_sas_sync_cq(cq); 1986 slot->task = NULL; 1987 } 1988 1989 if (timeout->rst_ha_timeout) { 1990 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n", 1991 SAS_ADDR(device->sas_addr)); 1992 queue_work(hisi_hba->wq, &hisi_hba->rst_work); 1993 } else { 1994 pr_err("Internal abort: timeout and not done %016llx.\n", 1995 SAS_ADDR(device->sas_addr)); 1996 } 1997 1998 return true; 1999 } 2000 2001 return false; 2002 } 2003 2004 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) 2005 { 2006 hisi_sas_port_notify_formed(sas_phy); 2007 } 2008 2009 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type, 2010 u8 reg_index, u8 reg_count, u8 *write_data) 2011 { 2012 struct hisi_hba *hisi_hba = sha->lldd_ha; 2013 2014 if (!hisi_hba->hw->write_gpio) 2015 return -EOPNOTSUPP; 2016 2017 return hisi_hba->hw->write_gpio(hisi_hba, reg_type, 2018 reg_index, reg_count, write_data); 2019 } 2020 2021 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) 2022 { 2023 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2024 struct sas_phy *sphy = sas_phy->phy; 2025 unsigned long flags; 2026 2027 phy->phy_attached = 0; 2028 phy->phy_type = 0; 2029 phy->port = NULL; 2030 2031 spin_lock_irqsave(&phy->lock, flags); 2032 if (phy->enable) 2033 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 2034 else 2035 sphy->negotiated_linkrate = SAS_PHY_DISABLED; 2036 spin_unlock_irqrestore(&phy->lock, flags); 2037 } 2038 2039 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy, 2040 gfp_t gfp_flags) 2041 { 2042 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; 2043 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2044 struct device *dev = hisi_hba->dev; 2045 2046 if (rdy) { 2047 /* Phy down but ready */ 2048 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags); 2049 hisi_sas_port_notify_formed(sas_phy); 2050 } else { 2051 struct hisi_sas_port *port = phy->port; 2052 2053 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) || 2054 phy->in_reset) { 2055 dev_info(dev, "ignore flutter phy%d down\n", phy_no); 2056 return; 2057 } 2058 /* Phy down and not ready */ 2059 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags); 2060 sas_phy_disconnected(sas_phy); 2061 2062 if (port) { 2063 if (phy->phy_type & PORT_TYPE_SAS) { 2064 int port_id = port->id; 2065 2066 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba, 2067 port_id)) 2068 port->port_attached = 0; 2069 } else if (phy->phy_type & PORT_TYPE_SATA) 2070 port->port_attached = 0; 2071 } 2072 hisi_sas_phy_disconnected(phy); 2073 } 2074 } 2075 EXPORT_SYMBOL_GPL(hisi_sas_phy_down); 2076 2077 void hisi_sas_phy_bcast(struct hisi_sas_phy *phy) 2078 { 2079 struct asd_sas_phy *sas_phy = &phy->sas_phy; 2080 struct hisi_hba *hisi_hba = phy->hisi_hba; 2081 2082 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) 2083 return; 2084 2085 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC); 2086 } 2087 EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast); 2088 2089 int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type) 2090 { 2091 struct hisi_hba *hisi_hba = shost_priv(shost); 2092 2093 if (reset_type != SCSI_ADAPTER_RESET) 2094 return -EOPNOTSUPP; 2095 2096 queue_work(hisi_hba->wq, &hisi_hba->rst_work); 2097 2098 return 0; 2099 } 2100 EXPORT_SYMBOL_GPL(hisi_sas_host_reset); 2101 2102 struct scsi_transport_template *hisi_sas_stt; 2103 EXPORT_SYMBOL_GPL(hisi_sas_stt); 2104 2105 static struct sas_domain_function_template hisi_sas_transport_ops = { 2106 .lldd_dev_found = hisi_sas_dev_found, 2107 .lldd_dev_gone = hisi_sas_dev_gone, 2108 .lldd_execute_task = hisi_sas_queue_command, 2109 .lldd_control_phy = hisi_sas_control_phy, 2110 .lldd_abort_task = hisi_sas_abort_task, 2111 .lldd_abort_task_set = hisi_sas_abort_task_set, 2112 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset, 2113 .lldd_lu_reset = hisi_sas_lu_reset, 2114 .lldd_query_task = hisi_sas_query_task, 2115 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha, 2116 .lldd_port_formed = hisi_sas_port_formed, 2117 .lldd_write_gpio = hisi_sas_write_gpio, 2118 .lldd_tmf_aborted = hisi_sas_tmf_aborted, 2119 .lldd_abort_timeout = hisi_sas_internal_abort_timeout, 2120 }; 2121 2122 void hisi_sas_init_mem(struct hisi_hba *hisi_hba) 2123 { 2124 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS; 2125 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint; 2126 2127 for (i = 0; i < hisi_hba->queue_count; i++) { 2128 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2129 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2130 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i]; 2131 2132 s = sizeof(struct hisi_sas_cmd_hdr); 2133 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++) 2134 memset(&cmd_hdr[j], 0, s); 2135 2136 dq->wr_point = 0; 2137 2138 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2139 memset(hisi_hba->complete_hdr[i], 0, s); 2140 cq->rd_point = 0; 2141 } 2142 2143 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy; 2144 memset(hisi_hba->initial_fis, 0, s); 2145 2146 s = max_command_entries * sizeof(struct hisi_sas_iost); 2147 memset(hisi_hba->iost, 0, s); 2148 2149 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2150 memset(hisi_hba->breakpoint, 0, s); 2151 2152 s = sizeof(struct hisi_sas_sata_breakpoint); 2153 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++) 2154 memset(&sata_breakpoint[j], 0, s); 2155 } 2156 EXPORT_SYMBOL_GPL(hisi_sas_init_mem); 2157 2158 int hisi_sas_alloc(struct hisi_hba *hisi_hba) 2159 { 2160 struct device *dev = hisi_hba->dev; 2161 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS; 2162 int max_command_entries_ru, sz_slot_buf_ru; 2163 int blk_cnt, slots_per_blk; 2164 2165 sema_init(&hisi_hba->sem, 1); 2166 spin_lock_init(&hisi_hba->lock); 2167 for (i = 0; i < hisi_hba->n_phy; i++) { 2168 hisi_sas_phy_init(hisi_hba, i); 2169 hisi_hba->port[i].port_attached = 0; 2170 hisi_hba->port[i].id = -1; 2171 } 2172 2173 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { 2174 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED; 2175 hisi_hba->devices[i].device_id = i; 2176 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT; 2177 } 2178 2179 for (i = 0; i < hisi_hba->queue_count; i++) { 2180 struct hisi_sas_cq *cq = &hisi_hba->cq[i]; 2181 struct hisi_sas_dq *dq = &hisi_hba->dq[i]; 2182 2183 /* Completion queue structure */ 2184 cq->id = i; 2185 cq->hisi_hba = hisi_hba; 2186 spin_lock_init(&cq->poll_lock); 2187 2188 /* Delivery queue structure */ 2189 spin_lock_init(&dq->lock); 2190 INIT_LIST_HEAD(&dq->list); 2191 dq->id = i; 2192 dq->hisi_hba = hisi_hba; 2193 2194 /* Delivery queue */ 2195 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS; 2196 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s, 2197 &hisi_hba->cmd_hdr_dma[i], 2198 GFP_KERNEL); 2199 if (!hisi_hba->cmd_hdr[i]) 2200 goto err_out; 2201 2202 /* Completion queue */ 2203 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS; 2204 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s, 2205 &hisi_hba->complete_hdr_dma[i], 2206 GFP_KERNEL); 2207 if (!hisi_hba->complete_hdr[i]) 2208 goto err_out; 2209 } 2210 2211 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct); 2212 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma, 2213 GFP_KERNEL); 2214 if (!hisi_hba->itct) 2215 goto err_out; 2216 2217 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries, 2218 sizeof(struct hisi_sas_slot), 2219 GFP_KERNEL); 2220 if (!hisi_hba->slot_info) 2221 goto err_out; 2222 2223 /* roundup to avoid overly large block size */ 2224 max_command_entries_ru = roundup(max_command_entries, 64); 2225 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK) 2226 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table); 2227 else 2228 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table); 2229 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64); 2230 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE); 2231 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s; 2232 slots_per_blk = s / sz_slot_buf_ru; 2233 2234 for (i = 0; i < blk_cnt; i++) { 2235 int slot_index = i * slots_per_blk; 2236 dma_addr_t buf_dma; 2237 void *buf; 2238 2239 buf = dmam_alloc_coherent(dev, s, &buf_dma, 2240 GFP_KERNEL); 2241 if (!buf) 2242 goto err_out; 2243 2244 for (j = 0; j < slots_per_blk; j++, slot_index++) { 2245 struct hisi_sas_slot *slot; 2246 2247 slot = &hisi_hba->slot_info[slot_index]; 2248 slot->buf = buf; 2249 slot->buf_dma = buf_dma; 2250 slot->idx = slot_index; 2251 2252 buf += sz_slot_buf_ru; 2253 buf_dma += sz_slot_buf_ru; 2254 } 2255 } 2256 2257 s = max_command_entries * sizeof(struct hisi_sas_iost); 2258 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma, 2259 GFP_KERNEL); 2260 if (!hisi_hba->iost) 2261 goto err_out; 2262 2263 s = max_command_entries * sizeof(struct hisi_sas_breakpoint); 2264 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s, 2265 &hisi_hba->breakpoint_dma, 2266 GFP_KERNEL); 2267 if (!hisi_hba->breakpoint) 2268 goto err_out; 2269 2270 s = hisi_hba->slot_index_count = max_command_entries; 2271 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL); 2272 if (!hisi_hba->slot_index_tags) 2273 goto err_out; 2274 2275 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS; 2276 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s, 2277 &hisi_hba->initial_fis_dma, 2278 GFP_KERNEL); 2279 if (!hisi_hba->initial_fis) 2280 goto err_out; 2281 2282 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint); 2283 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s, 2284 &hisi_hba->sata_breakpoint_dma, 2285 GFP_KERNEL); 2286 if (!hisi_hba->sata_breakpoint) 2287 goto err_out; 2288 2289 hisi_hba->last_slot_index = 0; 2290 2291 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev)); 2292 if (!hisi_hba->wq) { 2293 dev_err(dev, "sas_alloc: failed to create workqueue\n"); 2294 goto err_out; 2295 } 2296 2297 return 0; 2298 err_out: 2299 return -ENOMEM; 2300 } 2301 EXPORT_SYMBOL_GPL(hisi_sas_alloc); 2302 2303 void hisi_sas_free(struct hisi_hba *hisi_hba) 2304 { 2305 int i; 2306 2307 for (i = 0; i < hisi_hba->n_phy; i++) { 2308 struct hisi_sas_phy *phy = &hisi_hba->phy[i]; 2309 2310 del_timer_sync(&phy->timer); 2311 } 2312 2313 if (hisi_hba->wq) 2314 destroy_workqueue(hisi_hba->wq); 2315 } 2316 EXPORT_SYMBOL_GPL(hisi_sas_free); 2317 2318 void hisi_sas_rst_work_handler(struct work_struct *work) 2319 { 2320 struct hisi_hba *hisi_hba = 2321 container_of(work, struct hisi_hba, rst_work); 2322 2323 if (hisi_sas_controller_prereset(hisi_hba)) 2324 return; 2325 2326 hisi_sas_controller_reset(hisi_hba); 2327 } 2328 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler); 2329 2330 void hisi_sas_sync_rst_work_handler(struct work_struct *work) 2331 { 2332 struct hisi_sas_rst *rst = 2333 container_of(work, struct hisi_sas_rst, work); 2334 2335 if (hisi_sas_controller_prereset(rst->hisi_hba)) 2336 goto rst_complete; 2337 2338 if (!hisi_sas_controller_reset(rst->hisi_hba)) 2339 rst->done = true; 2340 rst_complete: 2341 complete(rst->completion); 2342 } 2343 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler); 2344 2345 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba) 2346 { 2347 struct device *dev = hisi_hba->dev; 2348 struct platform_device *pdev = hisi_hba->platform_dev; 2349 struct device_node *np = pdev ? pdev->dev.of_node : NULL; 2350 struct clk *refclk; 2351 2352 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr, 2353 SAS_ADDR_SIZE)) { 2354 dev_err(dev, "could not get property sas-addr\n"); 2355 return -ENOENT; 2356 } 2357 2358 if (np) { 2359 /* 2360 * These properties are only required for platform device-based 2361 * controller with DT firmware. 2362 */ 2363 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np, 2364 "hisilicon,sas-syscon"); 2365 if (IS_ERR(hisi_hba->ctrl)) { 2366 dev_err(dev, "could not get syscon\n"); 2367 return -ENOENT; 2368 } 2369 2370 if (device_property_read_u32(dev, "ctrl-reset-reg", 2371 &hisi_hba->ctrl_reset_reg)) { 2372 dev_err(dev, "could not get property ctrl-reset-reg\n"); 2373 return -ENOENT; 2374 } 2375 2376 if (device_property_read_u32(dev, "ctrl-reset-sts-reg", 2377 &hisi_hba->ctrl_reset_sts_reg)) { 2378 dev_err(dev, "could not get property ctrl-reset-sts-reg\n"); 2379 return -ENOENT; 2380 } 2381 2382 if (device_property_read_u32(dev, "ctrl-clock-ena-reg", 2383 &hisi_hba->ctrl_clock_ena_reg)) { 2384 dev_err(dev, "could not get property ctrl-clock-ena-reg\n"); 2385 return -ENOENT; 2386 } 2387 } 2388 2389 refclk = devm_clk_get(dev, NULL); 2390 if (IS_ERR(refclk)) 2391 dev_dbg(dev, "no ref clk property\n"); 2392 else 2393 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000; 2394 2395 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) { 2396 dev_err(dev, "could not get property phy-count\n"); 2397 return -ENOENT; 2398 } 2399 2400 if (device_property_read_u32(dev, "queue-count", 2401 &hisi_hba->queue_count)) { 2402 dev_err(dev, "could not get property queue-count\n"); 2403 return -ENOENT; 2404 } 2405 2406 return 0; 2407 } 2408 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info); 2409 2410 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev, 2411 const struct hisi_sas_hw *hw) 2412 { 2413 struct resource *res; 2414 struct Scsi_Host *shost; 2415 struct hisi_hba *hisi_hba; 2416 struct device *dev = &pdev->dev; 2417 int error; 2418 2419 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba)); 2420 if (!shost) { 2421 dev_err(dev, "scsi host alloc failed\n"); 2422 return NULL; 2423 } 2424 hisi_hba = shost_priv(shost); 2425 2426 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler); 2427 hisi_hba->hw = hw; 2428 hisi_hba->dev = dev; 2429 hisi_hba->platform_dev = pdev; 2430 hisi_hba->shost = shost; 2431 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha; 2432 2433 timer_setup(&hisi_hba->timer, NULL, 0); 2434 2435 if (hisi_sas_get_fw_info(hisi_hba) < 0) 2436 goto err_out; 2437 2438 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); 2439 if (error) { 2440 dev_err(dev, "No usable DMA addressing method\n"); 2441 goto err_out; 2442 } 2443 2444 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0); 2445 if (IS_ERR(hisi_hba->regs)) 2446 goto err_out; 2447 2448 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 2449 if (res) { 2450 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res); 2451 if (IS_ERR(hisi_hba->sgpio_regs)) 2452 goto err_out; 2453 } 2454 2455 if (hisi_sas_alloc(hisi_hba)) { 2456 hisi_sas_free(hisi_hba); 2457 goto err_out; 2458 } 2459 2460 return shost; 2461 err_out: 2462 scsi_host_put(shost); 2463 dev_err(dev, "shost alloc failed\n"); 2464 return NULL; 2465 } 2466 2467 static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba) 2468 { 2469 if (hisi_hba->hw->interrupt_preinit) 2470 return hisi_hba->hw->interrupt_preinit(hisi_hba); 2471 return 0; 2472 } 2473 2474 int hisi_sas_probe(struct platform_device *pdev, 2475 const struct hisi_sas_hw *hw) 2476 { 2477 struct Scsi_Host *shost; 2478 struct hisi_hba *hisi_hba; 2479 struct device *dev = &pdev->dev; 2480 struct asd_sas_phy **arr_phy; 2481 struct asd_sas_port **arr_port; 2482 struct sas_ha_struct *sha; 2483 int rc, phy_nr, port_nr, i; 2484 2485 shost = hisi_sas_shost_alloc(pdev, hw); 2486 if (!shost) 2487 return -ENOMEM; 2488 2489 sha = SHOST_TO_SAS_HA(shost); 2490 hisi_hba = shost_priv(shost); 2491 platform_set_drvdata(pdev, sha); 2492 2493 phy_nr = port_nr = hisi_hba->n_phy; 2494 2495 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL); 2496 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL); 2497 if (!arr_phy || !arr_port) { 2498 rc = -ENOMEM; 2499 goto err_out_ha; 2500 } 2501 2502 sha->sas_phy = arr_phy; 2503 sha->sas_port = arr_port; 2504 sha->lldd_ha = hisi_hba; 2505 2506 shost->transportt = hisi_sas_stt; 2507 shost->max_id = HISI_SAS_MAX_DEVICES; 2508 shost->max_lun = ~0; 2509 shost->max_channel = 1; 2510 shost->max_cmd_len = 16; 2511 if (hisi_hba->hw->slot_index_alloc) { 2512 shost->can_queue = HISI_SAS_MAX_COMMANDS; 2513 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS; 2514 } else { 2515 shost->can_queue = HISI_SAS_UNRESERVED_IPTT; 2516 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT; 2517 } 2518 2519 sha->sas_ha_name = DRV_NAME; 2520 sha->dev = hisi_hba->dev; 2521 sha->sas_addr = &hisi_hba->sas_addr[0]; 2522 sha->num_phys = hisi_hba->n_phy; 2523 sha->shost = hisi_hba->shost; 2524 2525 for (i = 0; i < hisi_hba->n_phy; i++) { 2526 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy; 2527 sha->sas_port[i] = &hisi_hba->port[i].sas_port; 2528 } 2529 2530 rc = hisi_sas_interrupt_preinit(hisi_hba); 2531 if (rc) 2532 goto err_out_ha; 2533 2534 rc = scsi_add_host(shost, &pdev->dev); 2535 if (rc) 2536 goto err_out_ha; 2537 2538 rc = sas_register_ha(sha); 2539 if (rc) 2540 goto err_out_register_ha; 2541 2542 rc = hisi_hba->hw->hw_init(hisi_hba); 2543 if (rc) 2544 goto err_out_hw_init; 2545 2546 scsi_scan_host(shost); 2547 2548 return 0; 2549 2550 err_out_hw_init: 2551 sas_unregister_ha(sha); 2552 err_out_register_ha: 2553 scsi_remove_host(shost); 2554 err_out_ha: 2555 hisi_sas_free(hisi_hba); 2556 scsi_host_put(shost); 2557 return rc; 2558 } 2559 EXPORT_SYMBOL_GPL(hisi_sas_probe); 2560 2561 void hisi_sas_remove(struct platform_device *pdev) 2562 { 2563 struct sas_ha_struct *sha = platform_get_drvdata(pdev); 2564 struct hisi_hba *hisi_hba = sha->lldd_ha; 2565 struct Scsi_Host *shost = sha->shost; 2566 2567 del_timer_sync(&hisi_hba->timer); 2568 2569 sas_unregister_ha(sha); 2570 sas_remove_host(shost); 2571 2572 hisi_sas_free(hisi_hba); 2573 scsi_host_put(shost); 2574 } 2575 EXPORT_SYMBOL_GPL(hisi_sas_remove); 2576 2577 #if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE) 2578 #define DEBUGFS_ENABLE_DEFAULT "enabled" 2579 bool hisi_sas_debugfs_enable = true; 2580 u32 hisi_sas_debugfs_dump_count = 50; 2581 #else 2582 #define DEBUGFS_ENABLE_DEFAULT "disabled" 2583 bool hisi_sas_debugfs_enable; 2584 u32 hisi_sas_debugfs_dump_count = 1; 2585 #endif 2586 2587 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable); 2588 module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444); 2589 MODULE_PARM_DESC(hisi_sas_debugfs_enable, 2590 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")"); 2591 2592 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count); 2593 module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444); 2594 MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow"); 2595 2596 struct dentry *hisi_sas_debugfs_dir; 2597 EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir); 2598 2599 static __init int hisi_sas_init(void) 2600 { 2601 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops); 2602 if (!hisi_sas_stt) 2603 return -ENOMEM; 2604 2605 if (hisi_sas_debugfs_enable) { 2606 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL); 2607 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) { 2608 pr_info("hisi_sas: Limiting debugfs dump count\n"); 2609 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP; 2610 } 2611 } 2612 2613 return 0; 2614 } 2615 2616 static __exit void hisi_sas_exit(void) 2617 { 2618 sas_release_transport(hisi_sas_stt); 2619 2620 debugfs_remove(hisi_sas_debugfs_dir); 2621 } 2622 2623 module_init(hisi_sas_init); 2624 module_exit(hisi_sas_exit); 2625 2626 MODULE_LICENSE("GPL"); 2627 MODULE_AUTHOR("John Garry <john.garry@huawei.com>"); 2628 MODULE_DESCRIPTION("HISILICON SAS controller driver"); 2629 MODULE_ALIAS("platform:" DRV_NAME); 2630