2646 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 13static int hisi_sas_softreset_ata_disk(struct domain_device *device);14static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,15 void *funcdata);16static void hisi_sas_release_task(struct hisi_hba *hisi_hba,17 struct domain_device *device);18static void hisi_sas_dev_gone(struct domain_device *device);19 20struct hisi_sas_internal_abort_data {21 bool rst_ha_timeout; /* reset the HA for timeout */22};23 24u8 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}100EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);101 102void 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}117EXPORT_SYMBOL_GPL(hisi_sas_sata_done);118 119/*120 * This function assumes linkrate mask fits in 8 bits, which it121 * does for all HW versions supported.122 */123u8 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}133EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);134 135static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)136{137 return device->port->ha->lldd_ha;138}139 140struct 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}144EXPORT_SYMBOL_GPL(to_hisi_sas_port);145 146void 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}153EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);154 155static 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 162static 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 172static 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 179static 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 207void 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 else228 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}254EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);255 256static 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 262static 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 268static 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 274static 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 280static 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 296static 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 337err_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);340prep_out:341 return rc;342}343 344static 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 359static 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 391err_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 397static398void 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 461static 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, should483 * not call task_done for sata484 */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 else512 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 complete541 * internal IOs of libsas or libata when there is at least542 * one iopoll queue543 */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 else588 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 607err_out_dif_dma_unmap:608 if (!sas_protocol_ata(task->task_proto))609 hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);610err_out_dma_unmap:611 hisi_sas_dma_unmap(hisi_hba, task, n_elem);612prep_out:613 dev_err(dev, "task exec: failed[%d]!\n", rc);614 return rc;615}616 617static 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 657static 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 690static 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 697static 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 706static 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 else711 synchronize_irq(cq->irq_no);712}713 714void 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}725EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs);726 727void 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}737EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs);738 739static 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 task751 * before using task in IO completion752 */753 hisi_sas_sync_cq(cq);754 slot->task = NULL;755 }756}757 758#define HISI_SAS_DISK_RECOVER_CNT 3759static 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 then784 * we should issue a hard reset to clear previous affiliation785 * of STP target port, see SPL (chapter 6.19.4).786 *787 * However we don't need to issue a hard reset here for these788 * reasons:789 * a. When probing the device, libsas/libata already issues a790 * hard reset in sas_probe_sata() -> ata_port_probe().791 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care792 * 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 808int 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}824EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);825 826static 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 else837 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 866err_out:867 hisi_sas_dev_gone(device);868 return rc;869}870 871int hisi_sas_device_configure(struct scsi_device *sdev,872 struct queue_limits *lim)873{874 struct domain_device *dev = sdev_to_domain_dev(sdev);875 int ret = sas_device_configure(sdev, lim);876 877 if (ret)878 return ret;879 if (!dev_is_sata(dev))880 sas_change_queue_depth(sdev, 64);881 882 return 0;883}884EXPORT_SYMBOL_GPL(hisi_sas_device_configure);885 886void hisi_sas_scan_start(struct Scsi_Host *shost)887{888 struct hisi_hba *hisi_hba = shost_priv(shost);889 890 hisi_hba->hw->phys_init(hisi_hba);891}892EXPORT_SYMBOL_GPL(hisi_sas_scan_start);893 894int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)895{896 struct hisi_hba *hisi_hba = shost_priv(shost);897 struct sas_ha_struct *sha = &hisi_hba->sha;898 899 /* Wait for PHY up interrupt to occur */900 if (time < HZ)901 return 0;902 903 sas_drain_work(sha);904 return 1;905}906EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);907 908static void hisi_sas_phyup_work_common(struct work_struct *work,909 enum hisi_sas_phy_event event)910{911 struct hisi_sas_phy *phy =912 container_of(work, typeof(*phy), works[event]);913 struct hisi_hba *hisi_hba = phy->hisi_hba;914 struct asd_sas_phy *sas_phy = &phy->sas_phy;915 int phy_no = sas_phy->id;916 917 phy->wait_phyup_cnt = 0;918 if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)919 hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);920 hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);921}922 923static void hisi_sas_phyup_work(struct work_struct *work)924{925 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);926}927 928static void hisi_sas_linkreset_work(struct work_struct *work)929{930 struct hisi_sas_phy *phy =931 container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);932 struct asd_sas_phy *sas_phy = &phy->sas_phy;933 934 hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);935}936 937static void hisi_sas_phyup_pm_work(struct work_struct *work)938{939 struct hisi_sas_phy *phy =940 container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);941 struct hisi_hba *hisi_hba = phy->hisi_hba;942 struct device *dev = hisi_hba->dev;943 944 hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);945 pm_runtime_put_sync(dev);946}947 948static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {949 [HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,950 [HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,951 [HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,952};953 954bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,955 enum hisi_sas_phy_event event)956{957 struct hisi_hba *hisi_hba = phy->hisi_hba;958 959 if (WARN_ON(event >= HISI_PHYES_NUM))960 return false;961 962 return queue_work(hisi_hba->wq, &phy->works[event]);963}964EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);965 966static void hisi_sas_wait_phyup_timedout(struct timer_list *t)967{968 struct hisi_sas_phy *phy = from_timer(phy, t, timer);969 struct hisi_hba *hisi_hba = phy->hisi_hba;970 struct device *dev = hisi_hba->dev;971 int phy_no = phy->sas_phy.id;972 973 dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);974 hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);975}976 977#define HISI_SAS_WAIT_PHYUP_RETRIES 10978 979void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)980{981 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];982 struct device *dev = hisi_hba->dev;983 unsigned long flags;984 985 dev_dbg(dev, "phy%d OOB ready\n", phy_no);986 spin_lock_irqsave(&phy->lock, flags);987 if (phy->phy_attached) {988 spin_unlock_irqrestore(&phy->lock, flags);989 return;990 }991 992 if (!timer_pending(&phy->timer)) {993 if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {994 phy->wait_phyup_cnt++;995 phy->timer.expires = jiffies +996 HISI_SAS_WAIT_PHYUP_TIMEOUT;997 add_timer(&phy->timer);998 spin_unlock_irqrestore(&phy->lock, flags);999 return;1000 }1001 1002 dev_warn(dev, "phy%d failed to come up %d times, giving up\n",1003 phy_no, phy->wait_phyup_cnt);1004 phy->wait_phyup_cnt = 0;1005 }1006 spin_unlock_irqrestore(&phy->lock, flags);1007}1008 1009EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);1010 1011static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)1012{1013 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];1014 struct asd_sas_phy *sas_phy = &phy->sas_phy;1015 int i;1016 1017 phy->hisi_hba = hisi_hba;1018 phy->port = NULL;1019 phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;1020 phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();1021 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;1022 sas_phy->iproto = SAS_PROTOCOL_ALL;1023 sas_phy->tproto = 0;1024 sas_phy->role = PHY_ROLE_INITIATOR;1025 sas_phy->oob_mode = OOB_NOT_CONNECTED;1026 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;1027 sas_phy->id = phy_no;1028 sas_phy->sas_addr = &hisi_hba->sas_addr[0];1029 sas_phy->frame_rcvd = &phy->frame_rcvd[0];1030 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;1031 sas_phy->lldd_phy = phy;1032 1033 for (i = 0; i < HISI_PHYES_NUM; i++)1034 INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);1035 1036 spin_lock_init(&phy->lock);1037 1038 timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);1039}1040 1041/* Wrapper to ensure we track hisi_sas_phy.enable properly */1042void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)1043{1044 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];1045 struct asd_sas_phy *aphy = &phy->sas_phy;1046 struct sas_phy *sphy = aphy->phy;1047 unsigned long flags;1048 1049 spin_lock_irqsave(&phy->lock, flags);1050 1051 if (enable) {1052 /* We may have been enabled already; if so, don't touch */1053 if (!phy->enable)1054 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;1055 hisi_hba->hw->phy_start(hisi_hba, phy_no);1056 } else {1057 sphy->negotiated_linkrate = SAS_PHY_DISABLED;1058 hisi_hba->hw->phy_disable(hisi_hba, phy_no);1059 }1060 phy->enable = enable;1061 spin_unlock_irqrestore(&phy->lock, flags);1062}1063EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);1064 1065static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)1066{1067 struct hisi_sas_phy *phy = sas_phy->lldd_phy;1068 struct asd_sas_port *sas_port = sas_phy->port;1069 struct hisi_sas_port *port;1070 1071 if (!sas_port)1072 return;1073 1074 port = to_hisi_sas_port(sas_port);1075 port->port_attached = 1;1076 port->id = phy->port_id;1077 phy->port = port;1078 sas_port->lldd_port = port;1079}1080 1081static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,1082 struct hisi_sas_slot *slot, bool need_lock)1083{1084 if (task) {1085 unsigned long flags;1086 struct task_status_struct *ts;1087 1088 ts = &task->task_status;1089 1090 ts->resp = SAS_TASK_COMPLETE;1091 ts->stat = SAS_ABORTED_TASK;1092 spin_lock_irqsave(&task->task_state_lock, flags);1093 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;1094 if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)1095 task->task_state_flags |= SAS_TASK_STATE_DONE;1096 spin_unlock_irqrestore(&task->task_state_lock, flags);1097 }1098 1099 hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);1100}1101 1102static void hisi_sas_release_task(struct hisi_hba *hisi_hba,1103 struct domain_device *device)1104{1105 struct hisi_sas_slot *slot, *slot2;1106 struct hisi_sas_device *sas_dev = device->lldd_dev;1107 1108 spin_lock(&sas_dev->lock);1109 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)1110 hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);1111 1112 spin_unlock(&sas_dev->lock);1113}1114 1115void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)1116{1117 struct hisi_sas_device *sas_dev;1118 struct domain_device *device;1119 int i;1120 1121 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {1122 sas_dev = &hisi_hba->devices[i];1123 device = sas_dev->sas_device;1124 1125 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||1126 !device)1127 continue;1128 1129 hisi_sas_release_task(hisi_hba, device);1130 }1131}1132EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);1133 1134static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,1135 struct domain_device *device)1136{1137 if (hisi_hba->hw->dereg_device)1138 hisi_hba->hw->dereg_device(hisi_hba, device);1139}1140 1141static int1142hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,1143 bool rst_ha_timeout)1144{1145 struct hisi_sas_internal_abort_data data = { rst_ha_timeout };1146 struct domain_device *device = sas_dev->sas_device;1147 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;1148 int i, rc;1149 1150 for (i = 0; i < hisi_hba->cq_nvecs; i++) {1151 struct hisi_sas_cq *cq = &hisi_hba->cq[i];1152 const struct cpumask *mask = cq->irq_mask;1153 1154 if (mask && !cpumask_intersects(cpu_online_mask, mask))1155 continue;1156 rc = sas_execute_internal_abort_dev(device, i, &data);1157 if (rc)1158 return rc;1159 }1160 1161 return 0;1162}1163 1164static void hisi_sas_dev_gone(struct domain_device *device)1165{1166 struct hisi_sas_device *sas_dev = device->lldd_dev;1167 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1168 struct device *dev = hisi_hba->dev;1169 int ret = 0;1170 1171 dev_info(dev, "dev[%d:%x] is gone\n",1172 sas_dev->device_id, sas_dev->dev_type);1173 1174 down(&hisi_hba->sem);1175 if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {1176 hisi_sas_internal_task_abort_dev(sas_dev, true);1177 1178 hisi_sas_dereg_device(hisi_hba, device);1179 1180 ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);1181 device->lldd_dev = NULL;1182 }1183 1184 if (hisi_hba->hw->free_device)1185 hisi_hba->hw->free_device(sas_dev);1186 1187 /* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */1188 if (!ret)1189 sas_dev->dev_type = SAS_PHY_UNUSED;1190 sas_dev->sas_device = NULL;1191 up(&hisi_hba->sem);1192}1193 1194static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,1195 struct sas_phy_linkrates *r)1196{1197 struct sas_phy_linkrates _r;1198 1199 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];1200 struct asd_sas_phy *sas_phy = &phy->sas_phy;1201 enum sas_linkrate min, max;1202 1203 if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)1204 return -EINVAL;1205 1206 if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {1207 max = sas_phy->phy->maximum_linkrate;1208 min = r->minimum_linkrate;1209 } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {1210 max = r->maximum_linkrate;1211 min = sas_phy->phy->minimum_linkrate;1212 } else1213 return -EINVAL;1214 1215 _r.maximum_linkrate = max;1216 _r.minimum_linkrate = min;1217 1218 sas_phy->phy->maximum_linkrate = max;1219 sas_phy->phy->minimum_linkrate = min;1220 1221 hisi_sas_phy_enable(hisi_hba, phy_no, 0);1222 msleep(100);1223 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);1224 hisi_sas_phy_enable(hisi_hba, phy_no, 1);1225 1226 return 0;1227}1228 1229static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,1230 void *funcdata)1231{1232 struct hisi_sas_phy *phy = container_of(sas_phy,1233 struct hisi_sas_phy, sas_phy);1234 struct sas_ha_struct *sas_ha = sas_phy->ha;1235 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;1236 struct device *dev = hisi_hba->dev;1237 DECLARE_COMPLETION_ONSTACK(completion);1238 int phy_no = sas_phy->id;1239 u8 sts = phy->phy_attached;1240 int ret = 0;1241 1242 down(&hisi_hba->sem);1243 phy->reset_completion = &completion;1244 1245 switch (func) {1246 case PHY_FUNC_HARD_RESET:1247 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);1248 break;1249 1250 case PHY_FUNC_LINK_RESET:1251 hisi_sas_phy_enable(hisi_hba, phy_no, 0);1252 msleep(100);1253 hisi_sas_phy_enable(hisi_hba, phy_no, 1);1254 break;1255 1256 case PHY_FUNC_DISABLE:1257 hisi_sas_phy_enable(hisi_hba, phy_no, 0);1258 goto out;1259 1260 case PHY_FUNC_SET_LINK_RATE:1261 ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);1262 break;1263 1264 case PHY_FUNC_GET_EVENTS:1265 if (hisi_hba->hw->get_events) {1266 hisi_hba->hw->get_events(hisi_hba, phy_no);1267 goto out;1268 }1269 fallthrough;1270 case PHY_FUNC_RELEASE_SPINUP_HOLD:1271 default:1272 ret = -EOPNOTSUPP;1273 goto out;1274 }1275 1276 if (sts && !wait_for_completion_timeout(&completion,1277 HISI_SAS_WAIT_PHYUP_TIMEOUT)) {1278 dev_warn(dev, "phy%d wait phyup timed out for func %d\n",1279 phy_no, func);1280 if (phy->in_reset)1281 ret = -ETIMEDOUT;1282 }1283 1284out:1285 phy->reset_completion = NULL;1286 1287 up(&hisi_hba->sem);1288 return ret;1289}1290 1291static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,1292 bool reset, int pmp, u8 *fis)1293{1294 struct ata_taskfile tf;1295 1296 ata_tf_init(dev, &tf);1297 if (reset)1298 tf.ctl |= ATA_SRST;1299 else1300 tf.ctl &= ~ATA_SRST;1301 tf.command = ATA_CMD_DEV_RESET;1302 ata_tf_to_fis(&tf, pmp, 0, fis);1303}1304 1305static int hisi_sas_softreset_ata_disk(struct domain_device *device)1306{1307 u8 fis[20] = {0};1308 struct ata_port *ap = device->sata_dev.ap;1309 struct ata_link *link;1310 int rc = TMF_RESP_FUNC_FAILED;1311 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1312 struct device *dev = hisi_hba->dev;1313 1314 ata_for_each_link(link, ap, EDGE) {1315 int pmp = sata_srst_pmp(link);1316 1317 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);1318 rc = sas_execute_ata_cmd(device, fis, -1);1319 if (rc != TMF_RESP_FUNC_COMPLETE)1320 break;1321 }1322 1323 if (rc == TMF_RESP_FUNC_COMPLETE) {1324 ata_for_each_link(link, ap, EDGE) {1325 int pmp = sata_srst_pmp(link);1326 1327 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);1328 rc = sas_execute_ata_cmd(device, fis, -1);1329 if (rc != TMF_RESP_FUNC_COMPLETE)1330 dev_err(dev, "ata disk %016llx de-reset failed\n",1331 SAS_ADDR(device->sas_addr));1332 }1333 } else {1334 dev_err(dev, "ata disk %016llx reset failed\n",1335 SAS_ADDR(device->sas_addr));1336 }1337 1338 if (rc == TMF_RESP_FUNC_COMPLETE)1339 hisi_sas_release_task(hisi_hba, device);1340 1341 return rc;1342}1343 1344static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)1345{1346 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);1347 int i;1348 1349 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {1350 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];1351 struct domain_device *device = sas_dev->sas_device;1352 struct asd_sas_port *sas_port;1353 struct hisi_sas_port *port;1354 struct hisi_sas_phy *phy = NULL;1355 struct asd_sas_phy *sas_phy;1356 1357 if ((sas_dev->dev_type == SAS_PHY_UNUSED)1358 || !device || !device->port)1359 continue;1360 1361 sas_port = device->port;1362 port = to_hisi_sas_port(sas_port);1363 1364 spin_lock(&sas_port->phy_list_lock);1365 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)1366 if (state & BIT(sas_phy->id)) {1367 phy = sas_phy->lldd_phy;1368 break;1369 }1370 spin_unlock(&sas_port->phy_list_lock);1371 1372 if (phy) {1373 port->id = phy->port_id;1374 1375 /* Update linkrate of directly attached device. */1376 if (!device->parent)1377 device->linkrate = phy->sas_phy.linkrate;1378 1379 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);1380 } else if (!port->port_attached)1381 port->id = 0xff;1382 }1383}1384 1385static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)1386{1387 struct asd_sas_port *_sas_port = NULL;1388 int phy_no;1389 1390 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {1391 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];1392 struct asd_sas_phy *sas_phy = &phy->sas_phy;1393 struct asd_sas_port *sas_port = sas_phy->port;1394 bool do_port_check = _sas_port != sas_port;1395 1396 if (!sas_phy->phy->enabled)1397 continue;1398 1399 /* Report PHY state change to libsas */1400 if (state & BIT(phy_no)) {1401 if (do_port_check && sas_port && sas_port->port_dev) {1402 struct domain_device *dev = sas_port->port_dev;1403 1404 _sas_port = sas_port;1405 1406 if (dev_is_expander(dev->dev_type))1407 sas_notify_port_event(sas_phy,1408 PORTE_BROADCAST_RCVD,1409 GFP_KERNEL);1410 }1411 } else {1412 hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);1413 }1414 }1415}1416 1417static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)1418{1419 struct hisi_sas_device *sas_dev;1420 struct domain_device *device;1421 int i;1422 1423 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {1424 sas_dev = &hisi_hba->devices[i];1425 device = sas_dev->sas_device;1426 1427 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)1428 continue;1429 1430 hisi_sas_init_device(device);1431 }1432}1433 1434static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,1435 struct asd_sas_port *sas_port,1436 struct domain_device *device)1437{1438 struct ata_port *ap = device->sata_dev.ap;1439 struct device *dev = hisi_hba->dev;1440 int rc = TMF_RESP_FUNC_FAILED;1441 struct ata_link *link;1442 u8 fis[20] = {0};1443 int i;1444 1445 for (i = 0; i < hisi_hba->n_phy; i++) {1446 if (!(sas_port->phy_mask & BIT(i)))1447 continue;1448 1449 ata_for_each_link(link, ap, EDGE) {1450 int pmp = sata_srst_pmp(link);1451 1452 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);1453 rc = sas_execute_ata_cmd(device, fis, i);1454 if (rc != TMF_RESP_FUNC_COMPLETE) {1455 dev_err(dev, "phy%d ata reset failed rc=%d\n",1456 i, rc);1457 break;1458 }1459 }1460 }1461}1462 1463static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)1464{1465 struct device *dev = hisi_hba->dev;1466 int port_no, rc, i;1467 1468 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {1469 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];1470 struct domain_device *device = sas_dev->sas_device;1471 1472 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)1473 continue;1474 1475 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);1476 if (rc < 0)1477 dev_err(dev, "STP reject: abort dev failed %d\n", rc);1478 }1479 1480 for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {1481 struct hisi_sas_port *port = &hisi_hba->port[port_no];1482 struct asd_sas_port *sas_port = &port->sas_port;1483 struct domain_device *port_dev = sas_port->port_dev;1484 struct domain_device *device;1485 1486 if (!port_dev || !dev_is_expander(port_dev->dev_type))1487 continue;1488 1489 /* Try to find a SATA device */1490 list_for_each_entry(device, &sas_port->dev_list,1491 dev_list_node) {1492 if (dev_is_sata(device)) {1493 hisi_sas_send_ata_reset_each_phy(hisi_hba,1494 sas_port,1495 device);1496 break;1497 }1498 }1499 }1500}1501 1502void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)1503{1504 struct Scsi_Host *shost = hisi_hba->shost;1505 1506 hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);1507 1508 scsi_block_requests(shost);1509 hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);1510 1511 /*1512 * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht1513 * which is also only used for v1/v2 hw to skip it for v3 hw1514 */1515 if (hisi_hba->hw->sht)1516 del_timer_sync(&hisi_hba->timer);1517 1518 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);1519}1520EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);1521 1522static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)1523{1524 struct hisi_sas_phy *phy = data;1525 struct hisi_hba *hisi_hba = phy->hisi_hba;1526 struct device *dev = hisi_hba->dev;1527 DECLARE_COMPLETION_ONSTACK(completion);1528 int phy_no = phy->sas_phy.id;1529 1530 phy->reset_completion = &completion;1531 hisi_sas_phy_enable(hisi_hba, phy_no, 1);1532 if (!wait_for_completion_timeout(&completion,1533 HISI_SAS_WAIT_PHYUP_TIMEOUT))1534 dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);1535 1536 phy->reset_completion = NULL;1537}1538 1539void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)1540{1541 struct Scsi_Host *shost = hisi_hba->shost;1542 ASYNC_DOMAIN_EXCLUSIVE(async);1543 int phy_no;1544 1545 /* Init and wait for PHYs to come up and all libsas event finished. */1546 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {1547 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];1548 1549 if (!(hisi_hba->phy_state & BIT(phy_no)))1550 continue;1551 1552 async_schedule_domain(hisi_sas_async_init_wait_phyup,1553 phy, &async);1554 }1555 1556 async_synchronize_full_domain(&async);1557 hisi_sas_refresh_port_id(hisi_hba);1558 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);1559 1560 if (hisi_hba->reject_stp_links_msk)1561 hisi_sas_terminate_stp_reject(hisi_hba);1562 hisi_sas_reset_init_all_devices(hisi_hba);1563 scsi_unblock_requests(shost);1564 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);1565 up(&hisi_hba->sem);1566 1567 hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);1568}1569EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);1570 1571static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)1572{1573 if (!hisi_hba->hw->soft_reset)1574 return -ENOENT;1575 1576 down(&hisi_hba->sem);1577 if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {1578 up(&hisi_hba->sem);1579 return -EPERM;1580 }1581 1582 if (hisi_sas_debugfs_enable)1583 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);1584 1585 return 0;1586}1587 1588static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)1589{1590 struct device *dev = hisi_hba->dev;1591 struct Scsi_Host *shost = hisi_hba->shost;1592 int rc;1593 1594 dev_info(dev, "controller resetting...\n");1595 hisi_sas_controller_reset_prepare(hisi_hba);1596 1597 rc = hisi_hba->hw->soft_reset(hisi_hba);1598 if (rc) {1599 dev_warn(dev, "controller reset failed (%d)\n", rc);1600 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);1601 up(&hisi_hba->sem);1602 scsi_unblock_requests(shost);1603 clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);1604 return rc;1605 }1606 clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);1607 1608 hisi_sas_controller_reset_done(hisi_hba);1609 dev_info(dev, "controller reset complete\n");1610 1611 return 0;1612}1613 1614static int hisi_sas_abort_task(struct sas_task *task)1615{1616 struct hisi_sas_internal_abort_data internal_abort_data = { false };1617 struct domain_device *device = task->dev;1618 struct hisi_sas_device *sas_dev = device->lldd_dev;1619 struct hisi_sas_slot *slot = task->lldd_task;1620 struct hisi_hba *hisi_hba;1621 struct device *dev;1622 int rc = TMF_RESP_FUNC_FAILED;1623 unsigned long flags;1624 1625 if (!sas_dev)1626 return TMF_RESP_FUNC_FAILED;1627 1628 hisi_hba = dev_to_hisi_hba(task->dev);1629 dev = hisi_hba->dev;1630 1631 spin_lock_irqsave(&task->task_state_lock, flags);1632 if (task->task_state_flags & SAS_TASK_STATE_DONE) {1633 struct hisi_sas_cq *cq;1634 1635 if (slot) {1636 /*1637 * sync irq or poll queue to avoid free'ing task1638 * before using task in IO completion1639 */1640 cq = &hisi_hba->cq[slot->dlvry_queue];1641 hisi_sas_sync_cq(cq);1642 }1643 spin_unlock_irqrestore(&task->task_state_lock, flags);1644 rc = TMF_RESP_FUNC_COMPLETE;1645 goto out;1646 }1647 task->task_state_flags |= SAS_TASK_STATE_ABORTED;1648 spin_unlock_irqrestore(&task->task_state_lock, flags);1649 1650 if (!slot)1651 goto out;1652 1653 if (task->task_proto & SAS_PROTOCOL_SSP) {1654 u16 tag = slot->idx;1655 int rc2;1656 1657 rc = sas_abort_task(task, tag);1658 rc2 = sas_execute_internal_abort_single(device, tag,1659 slot->dlvry_queue, &internal_abort_data);1660 if (rc2 < 0) {1661 dev_err(dev, "abort task: internal abort (%d)\n", rc2);1662 return TMF_RESP_FUNC_FAILED;1663 }1664 1665 /*1666 * If the TMF finds that the IO is not in the device and also1667 * the internal abort does not succeed, then it is safe to1668 * free the slot.1669 * Note: if the internal abort succeeds then the slot1670 * will have already been completed1671 */1672 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {1673 if (task->lldd_task)1674 hisi_sas_do_release_task(hisi_hba, task, slot, true);1675 }1676 } else if (task->task_proto & SAS_PROTOCOL_SATA ||1677 task->task_proto & SAS_PROTOCOL_STP) {1678 if (task->dev->dev_type == SAS_SATA_DEV) {1679 struct ata_queued_cmd *qc = task->uldd_task;1680 1681 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);1682 if (rc < 0) {1683 dev_err(dev, "abort task: internal abort failed\n");1684 goto out;1685 }1686 hisi_sas_dereg_device(hisi_hba, device);1687 1688 /*1689 * If an ATA internal command times out in ATA EH, it1690 * need to execute soft reset, so check the scsicmd1691 */1692 if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&1693 qc && qc->scsicmd) {1694 hisi_sas_do_release_task(hisi_hba, task, slot, true);1695 rc = TMF_RESP_FUNC_COMPLETE;1696 } else {1697 rc = hisi_sas_softreset_ata_disk(device);1698 }1699 }1700 } else if (task->task_proto & SAS_PROTOCOL_SMP) {1701 /* SMP */1702 u32 tag = slot->idx;1703 struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];1704 1705 rc = sas_execute_internal_abort_single(device,1706 tag, slot->dlvry_queue,1707 &internal_abort_data);1708 if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&1709 task->lldd_task) {1710 /*1711 * sync irq or poll queue to avoid free'ing task1712 * before using task in IO completion1713 */1714 hisi_sas_sync_cq(cq);1715 slot->task = NULL;1716 }1717 }1718 1719out:1720 if (rc != TMF_RESP_FUNC_COMPLETE)1721 dev_notice(dev, "abort task: rc=%d\n", rc);1722 return rc;1723}1724 1725static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)1726{1727 struct hisi_sas_device *sas_dev = device->lldd_dev;1728 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1729 struct device *dev = hisi_hba->dev;1730 int rc;1731 1732 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);1733 if (rc < 0) {1734 dev_err(dev, "abort task set: internal abort rc=%d\n", rc);1735 return TMF_RESP_FUNC_FAILED;1736 }1737 hisi_sas_dereg_device(hisi_hba, device);1738 1739 rc = sas_abort_task_set(device, lun);1740 if (rc == TMF_RESP_FUNC_COMPLETE)1741 hisi_sas_release_task(hisi_hba, device);1742 1743 return rc;1744}1745 1746static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)1747{1748 struct sas_phy *local_phy = sas_get_local_phy(device);1749 struct hisi_sas_device *sas_dev = device->lldd_dev;1750 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1751 struct sas_ha_struct *sas_ha = &hisi_hba->sha;1752 int rc, reset_type;1753 1754 if (!local_phy->enabled) {1755 sas_put_local_phy(local_phy);1756 return -ENODEV;1757 }1758 1759 if (scsi_is_sas_phy_local(local_phy)) {1760 struct asd_sas_phy *sas_phy =1761 sas_ha->sas_phy[local_phy->number];1762 struct hisi_sas_phy *phy =1763 container_of(sas_phy, struct hisi_sas_phy, sas_phy);1764 unsigned long flags;1765 1766 spin_lock_irqsave(&phy->lock, flags);1767 phy->in_reset = 1;1768 spin_unlock_irqrestore(&phy->lock, flags);1769 }1770 1771 reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||1772 !dev_is_sata(device)) ? true : false;1773 1774 rc = sas_phy_reset(local_phy, reset_type);1775 sas_put_local_phy(local_phy);1776 1777 if (scsi_is_sas_phy_local(local_phy)) {1778 struct asd_sas_phy *sas_phy =1779 sas_ha->sas_phy[local_phy->number];1780 struct hisi_sas_phy *phy =1781 container_of(sas_phy, struct hisi_sas_phy, sas_phy);1782 unsigned long flags;1783 1784 spin_lock_irqsave(&phy->lock, flags);1785 phy->in_reset = 0;1786 spin_unlock_irqrestore(&phy->lock, flags);1787 1788 /* report PHY down if timed out */1789 if (rc == -ETIMEDOUT)1790 hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);1791 return rc;1792 }1793 1794 /* Remote phy */1795 if (rc)1796 return rc;1797 1798 if (dev_is_sata(device)) {1799 struct ata_link *link = &device->sata_dev.ap->link;1800 1801 rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,1802 smp_ata_check_ready_type);1803 } else {1804 msleep(2000);1805 }1806 1807 return rc;1808}1809 1810static int hisi_sas_I_T_nexus_reset(struct domain_device *device)1811{1812 struct hisi_sas_device *sas_dev = device->lldd_dev;1813 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1814 struct device *dev = hisi_hba->dev;1815 int rc;1816 1817 if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)1818 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;1819 1820 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);1821 if (rc < 0) {1822 dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);1823 return TMF_RESP_FUNC_FAILED;1824 }1825 hisi_sas_dereg_device(hisi_hba, device);1826 1827 rc = hisi_sas_debug_I_T_nexus_reset(device);1828 if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {1829 struct sas_phy *local_phy;1830 1831 rc = hisi_sas_softreset_ata_disk(device);1832 switch (rc) {1833 case -ECOMM:1834 rc = -ENODEV;1835 break;1836 case TMF_RESP_FUNC_FAILED:1837 case -EMSGSIZE:1838 case -EIO:1839 local_phy = sas_get_local_phy(device);1840 rc = sas_phy_enable(local_phy, 0);1841 if (!rc) {1842 local_phy->enabled = 0;1843 dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",1844 SAS_ADDR(device->sas_addr), rc);1845 rc = -ENODEV;1846 }1847 sas_put_local_phy(local_phy);1848 break;1849 default:1850 break;1851 }1852 }1853 1854 if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))1855 hisi_sas_release_task(hisi_hba, device);1856 1857 return rc;1858}1859 1860static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)1861{1862 struct hisi_sas_device *sas_dev = device->lldd_dev;1863 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1864 struct device *dev = hisi_hba->dev;1865 int rc = TMF_RESP_FUNC_FAILED;1866 1867 /* Clear internal IO and then lu reset */1868 rc = hisi_sas_internal_task_abort_dev(sas_dev, false);1869 if (rc < 0) {1870 dev_err(dev, "lu_reset: internal abort failed\n");1871 goto out;1872 }1873 hisi_sas_dereg_device(hisi_hba, device);1874 1875 if (dev_is_sata(device)) {1876 struct sas_phy *phy;1877 1878 phy = sas_get_local_phy(device);1879 1880 rc = sas_phy_reset(phy, true);1881 1882 if (rc == 0)1883 hisi_sas_release_task(hisi_hba, device);1884 sas_put_local_phy(phy);1885 } else {1886 rc = sas_lu_reset(device, lun);1887 if (rc == TMF_RESP_FUNC_COMPLETE)1888 hisi_sas_release_task(hisi_hba, device);1889 }1890out:1891 if (rc != TMF_RESP_FUNC_COMPLETE)1892 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",1893 sas_dev->device_id, rc);1894 return rc;1895}1896 1897static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)1898{1899 struct domain_device *device = data;1900 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1901 int rc;1902 1903 rc = hisi_sas_debug_I_T_nexus_reset(device);1904 if (rc != TMF_RESP_FUNC_COMPLETE)1905 dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",1906 SAS_ADDR(device->sas_addr), rc);1907}1908 1909static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)1910{1911 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;1912 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);1913 ASYNC_DOMAIN_EXCLUSIVE(async);1914 int i;1915 1916 queue_work(hisi_hba->wq, &r.work);1917 wait_for_completion(r.completion);1918 if (!r.done)1919 return TMF_RESP_FUNC_FAILED;1920 1921 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {1922 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];1923 struct domain_device *device = sas_dev->sas_device;1924 1925 if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||1926 dev_is_expander(device->dev_type))1927 continue;1928 1929 async_schedule_domain(hisi_sas_async_I_T_nexus_reset,1930 device, &async);1931 }1932 1933 async_synchronize_full_domain(&async);1934 hisi_sas_release_tasks(hisi_hba);1935 1936 return TMF_RESP_FUNC_COMPLETE;1937}1938 1939static int hisi_sas_query_task(struct sas_task *task)1940{1941 int rc = TMF_RESP_FUNC_FAILED;1942 1943 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {1944 struct hisi_sas_slot *slot = task->lldd_task;1945 u32 tag = slot->idx;1946 1947 rc = sas_query_task(task, tag);1948 switch (rc) {1949 /* The task is still in Lun, release it then */1950 case TMF_RESP_FUNC_SUCC:1951 /* The task is not in Lun or failed, reset the phy */1952 case TMF_RESP_FUNC_FAILED:1953 case TMF_RESP_FUNC_COMPLETE:1954 break;1955 default:1956 rc = TMF_RESP_FUNC_FAILED;1957 break;1958 }1959 }1960 return rc;1961}1962 1963static bool hisi_sas_internal_abort_timeout(struct sas_task *task,1964 void *data)1965{1966 struct domain_device *device = task->dev;1967 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);1968 struct hisi_sas_internal_abort_data *timeout = data;1969 1970 if (hisi_sas_debugfs_enable) {1971 /*1972 * If timeout occurs in device gone scenario, to avoid1973 * circular dependency like:1974 * hisi_sas_dev_gone() -> down() -> ... ->1975 * hisi_sas_internal_abort_timeout() -> down().1976 */1977 if (!timeout->rst_ha_timeout)1978 down(&hisi_hba->sem);1979 hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);1980 if (!timeout->rst_ha_timeout)1981 up(&hisi_hba->sem);1982 }1983 1984 if (task->task_state_flags & SAS_TASK_STATE_DONE) {1985 pr_err("Internal abort: timeout %016llx\n",1986 SAS_ADDR(device->sas_addr));1987 } else {1988 struct hisi_sas_slot *slot = task->lldd_task;1989 1990 set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);1991 1992 if (slot) {1993 struct hisi_sas_cq *cq =1994 &hisi_hba->cq[slot->dlvry_queue];1995 /*1996 * sync irq or poll queue to avoid free'ing task1997 * before using task in IO completion1998 */1999 hisi_sas_sync_cq(cq);2000 slot->task = NULL;2001 }2002 2003 if (timeout->rst_ha_timeout) {2004 pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",2005 SAS_ADDR(device->sas_addr));2006 queue_work(hisi_hba->wq, &hisi_hba->rst_work);2007 } else {2008 pr_err("Internal abort: timeout and not done %016llx.\n",2009 SAS_ADDR(device->sas_addr));2010 }2011 2012 return true;2013 }2014 2015 return false;2016}2017 2018static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)2019{2020 hisi_sas_port_notify_formed(sas_phy);2021}2022 2023static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,2024 u8 reg_index, u8 reg_count, u8 *write_data)2025{2026 struct hisi_hba *hisi_hba = sha->lldd_ha;2027 2028 if (!hisi_hba->hw->write_gpio)2029 return -EOPNOTSUPP;2030 2031 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,2032 reg_index, reg_count, write_data);2033}2034 2035static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)2036{2037 struct asd_sas_phy *sas_phy = &phy->sas_phy;2038 struct sas_phy *sphy = sas_phy->phy;2039 unsigned long flags;2040 2041 phy->phy_attached = 0;2042 phy->phy_type = 0;2043 phy->port = NULL;2044 2045 spin_lock_irqsave(&phy->lock, flags);2046 if (phy->enable)2047 sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;2048 else2049 sphy->negotiated_linkrate = SAS_PHY_DISABLED;2050 spin_unlock_irqrestore(&phy->lock, flags);2051}2052 2053void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,2054 gfp_t gfp_flags)2055{2056 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];2057 struct asd_sas_phy *sas_phy = &phy->sas_phy;2058 struct device *dev = hisi_hba->dev;2059 2060 if (rdy) {2061 /* Phy down but ready */2062 hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);2063 hisi_sas_port_notify_formed(sas_phy);2064 } else {2065 struct hisi_sas_port *port = phy->port;2066 2067 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||2068 phy->in_reset) {2069 dev_info(dev, "ignore flutter phy%d down\n", phy_no);2070 return;2071 }2072 /* Phy down and not ready */2073 sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);2074 sas_phy_disconnected(sas_phy);2075 2076 if (port) {2077 if (phy->phy_type & PORT_TYPE_SAS) {2078 int port_id = port->id;2079 2080 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,2081 port_id))2082 port->port_attached = 0;2083 } else if (phy->phy_type & PORT_TYPE_SATA)2084 port->port_attached = 0;2085 }2086 hisi_sas_phy_disconnected(phy);2087 }2088}2089EXPORT_SYMBOL_GPL(hisi_sas_phy_down);2090 2091void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)2092{2093 struct asd_sas_phy *sas_phy = &phy->sas_phy;2094 struct hisi_hba *hisi_hba = phy->hisi_hba;2095 2096 if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))2097 return;2098 2099 sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);2100}2101EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);2102 2103int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)2104{2105 struct hisi_hba *hisi_hba = shost_priv(shost);2106 2107 if (reset_type != SCSI_ADAPTER_RESET)2108 return -EOPNOTSUPP;2109 2110 queue_work(hisi_hba->wq, &hisi_hba->rst_work);2111 2112 return 0;2113}2114EXPORT_SYMBOL_GPL(hisi_sas_host_reset);2115 2116struct scsi_transport_template *hisi_sas_stt;2117EXPORT_SYMBOL_GPL(hisi_sas_stt);2118 2119static struct sas_domain_function_template hisi_sas_transport_ops = {2120 .lldd_dev_found = hisi_sas_dev_found,2121 .lldd_dev_gone = hisi_sas_dev_gone,2122 .lldd_execute_task = hisi_sas_queue_command,2123 .lldd_control_phy = hisi_sas_control_phy,2124 .lldd_abort_task = hisi_sas_abort_task,2125 .lldd_abort_task_set = hisi_sas_abort_task_set,2126 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,2127 .lldd_lu_reset = hisi_sas_lu_reset,2128 .lldd_query_task = hisi_sas_query_task,2129 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,2130 .lldd_port_formed = hisi_sas_port_formed,2131 .lldd_write_gpio = hisi_sas_write_gpio,2132 .lldd_tmf_aborted = hisi_sas_tmf_aborted,2133 .lldd_abort_timeout = hisi_sas_internal_abort_timeout,2134};2135 2136void hisi_sas_init_mem(struct hisi_hba *hisi_hba)2137{2138 int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;2139 struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;2140 2141 for (i = 0; i < hisi_hba->queue_count; i++) {2142 struct hisi_sas_cq *cq = &hisi_hba->cq[i];2143 struct hisi_sas_dq *dq = &hisi_hba->dq[i];2144 struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];2145 2146 s = sizeof(struct hisi_sas_cmd_hdr);2147 for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)2148 memset(&cmd_hdr[j], 0, s);2149 2150 dq->wr_point = 0;2151 2152 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;2153 memset(hisi_hba->complete_hdr[i], 0, s);2154 cq->rd_point = 0;2155 }2156 2157 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;2158 memset(hisi_hba->initial_fis, 0, s);2159 2160 s = max_command_entries * sizeof(struct hisi_sas_iost);2161 memset(hisi_hba->iost, 0, s);2162 2163 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);2164 memset(hisi_hba->breakpoint, 0, s);2165 2166 s = sizeof(struct hisi_sas_sata_breakpoint);2167 for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)2168 memset(&sata_breakpoint[j], 0, s);2169}2170EXPORT_SYMBOL_GPL(hisi_sas_init_mem);2171 2172int hisi_sas_alloc(struct hisi_hba *hisi_hba)2173{2174 struct device *dev = hisi_hba->dev;2175 int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;2176 int max_command_entries_ru, sz_slot_buf_ru;2177 int blk_cnt, slots_per_blk;2178 2179 sema_init(&hisi_hba->sem, 1);2180 spin_lock_init(&hisi_hba->lock);2181 for (i = 0; i < hisi_hba->n_phy; i++) {2182 hisi_sas_phy_init(hisi_hba, i);2183 hisi_hba->port[i].port_attached = 0;2184 hisi_hba->port[i].id = -1;2185 }2186 2187 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {2188 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;2189 hisi_hba->devices[i].device_id = i;2190 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;2191 }2192 2193 for (i = 0; i < hisi_hba->queue_count; i++) {2194 struct hisi_sas_cq *cq = &hisi_hba->cq[i];2195 struct hisi_sas_dq *dq = &hisi_hba->dq[i];2196 2197 /* Completion queue structure */2198 cq->id = i;2199 cq->hisi_hba = hisi_hba;2200 spin_lock_init(&cq->poll_lock);2201 2202 /* Delivery queue structure */2203 spin_lock_init(&dq->lock);2204 INIT_LIST_HEAD(&dq->list);2205 dq->id = i;2206 dq->hisi_hba = hisi_hba;2207 2208 /* Delivery queue */2209 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;2210 hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,2211 &hisi_hba->cmd_hdr_dma[i],2212 GFP_KERNEL);2213 if (!hisi_hba->cmd_hdr[i])2214 goto err_out;2215 2216 /* Completion queue */2217 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;2218 hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,2219 &hisi_hba->complete_hdr_dma[i],2220 GFP_KERNEL);2221 if (!hisi_hba->complete_hdr[i])2222 goto err_out;2223 }2224 2225 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);2226 hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,2227 GFP_KERNEL);2228 if (!hisi_hba->itct)2229 goto err_out;2230 2231 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,2232 sizeof(struct hisi_sas_slot),2233 GFP_KERNEL);2234 if (!hisi_hba->slot_info)2235 goto err_out;2236 2237 /* roundup to avoid overly large block size */2238 max_command_entries_ru = roundup(max_command_entries, 64);2239 if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)2240 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);2241 else2242 sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);2243 sz_slot_buf_ru = roundup(sz_slot_buf_ru, 64);2244 s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);2245 blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;2246 slots_per_blk = s / sz_slot_buf_ru;2247 2248 for (i = 0; i < blk_cnt; i++) {2249 int slot_index = i * slots_per_blk;2250 dma_addr_t buf_dma;2251 void *buf;2252 2253 buf = dmam_alloc_coherent(dev, s, &buf_dma,2254 GFP_KERNEL);2255 if (!buf)2256 goto err_out;2257 2258 for (j = 0; j < slots_per_blk; j++, slot_index++) {2259 struct hisi_sas_slot *slot;2260 2261 slot = &hisi_hba->slot_info[slot_index];2262 slot->buf = buf;2263 slot->buf_dma = buf_dma;2264 slot->idx = slot_index;2265 2266 buf += sz_slot_buf_ru;2267 buf_dma += sz_slot_buf_ru;2268 }2269 }2270 2271 s = max_command_entries * sizeof(struct hisi_sas_iost);2272 hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,2273 GFP_KERNEL);2274 if (!hisi_hba->iost)2275 goto err_out;2276 2277 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);2278 hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,2279 &hisi_hba->breakpoint_dma,2280 GFP_KERNEL);2281 if (!hisi_hba->breakpoint)2282 goto err_out;2283 2284 s = hisi_hba->slot_index_count = max_command_entries;2285 hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);2286 if (!hisi_hba->slot_index_tags)2287 goto err_out;2288 2289 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;2290 hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,2291 &hisi_hba->initial_fis_dma,2292 GFP_KERNEL);2293 if (!hisi_hba->initial_fis)2294 goto err_out;2295 2296 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);2297 hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,2298 &hisi_hba->sata_breakpoint_dma,2299 GFP_KERNEL);2300 if (!hisi_hba->sata_breakpoint)2301 goto err_out;2302 2303 hisi_hba->last_slot_index = 0;2304 2305 hisi_hba->wq =2306 alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, dev_name(dev));2307 if (!hisi_hba->wq) {2308 dev_err(dev, "sas_alloc: failed to create workqueue\n");2309 goto err_out;2310 }2311 2312 return 0;2313err_out:2314 return -ENOMEM;2315}2316EXPORT_SYMBOL_GPL(hisi_sas_alloc);2317 2318void hisi_sas_free(struct hisi_hba *hisi_hba)2319{2320 int i;2321 2322 for (i = 0; i < hisi_hba->n_phy; i++) {2323 struct hisi_sas_phy *phy = &hisi_hba->phy[i];2324 2325 del_timer_sync(&phy->timer);2326 }2327 2328 if (hisi_hba->wq)2329 destroy_workqueue(hisi_hba->wq);2330}2331EXPORT_SYMBOL_GPL(hisi_sas_free);2332 2333void hisi_sas_rst_work_handler(struct work_struct *work)2334{2335 struct hisi_hba *hisi_hba =2336 container_of(work, struct hisi_hba, rst_work);2337 2338 if (hisi_sas_controller_prereset(hisi_hba))2339 return;2340 2341 hisi_sas_controller_reset(hisi_hba);2342}2343EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);2344 2345void hisi_sas_sync_rst_work_handler(struct work_struct *work)2346{2347 struct hisi_sas_rst *rst =2348 container_of(work, struct hisi_sas_rst, work);2349 2350 if (hisi_sas_controller_prereset(rst->hisi_hba))2351 goto rst_complete;2352 2353 if (!hisi_sas_controller_reset(rst->hisi_hba))2354 rst->done = true;2355rst_complete:2356 complete(rst->completion);2357}2358EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);2359 2360int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)2361{2362 struct device *dev = hisi_hba->dev;2363 struct platform_device *pdev = hisi_hba->platform_dev;2364 struct device_node *np = pdev ? pdev->dev.of_node : NULL;2365 struct clk *refclk;2366 2367 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,2368 SAS_ADDR_SIZE)) {2369 dev_err(dev, "could not get property sas-addr\n");2370 return -ENOENT;2371 }2372 2373 if (np) {2374 /*2375 * These properties are only required for platform device-based2376 * controller with DT firmware.2377 */2378 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,2379 "hisilicon,sas-syscon");2380 if (IS_ERR(hisi_hba->ctrl)) {2381 dev_err(dev, "could not get syscon\n");2382 return -ENOENT;2383 }2384 2385 if (device_property_read_u32(dev, "ctrl-reset-reg",2386 &hisi_hba->ctrl_reset_reg)) {2387 dev_err(dev, "could not get property ctrl-reset-reg\n");2388 return -ENOENT;2389 }2390 2391 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",2392 &hisi_hba->ctrl_reset_sts_reg)) {2393 dev_err(dev, "could not get property ctrl-reset-sts-reg\n");2394 return -ENOENT;2395 }2396 2397 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",2398 &hisi_hba->ctrl_clock_ena_reg)) {2399 dev_err(dev, "could not get property ctrl-clock-ena-reg\n");2400 return -ENOENT;2401 }2402 }2403 2404 refclk = devm_clk_get(dev, NULL);2405 if (IS_ERR(refclk))2406 dev_dbg(dev, "no ref clk property\n");2407 else2408 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;2409 2410 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {2411 dev_err(dev, "could not get property phy-count\n");2412 return -ENOENT;2413 }2414 2415 if (device_property_read_u32(dev, "queue-count",2416 &hisi_hba->queue_count)) {2417 dev_err(dev, "could not get property queue-count\n");2418 return -ENOENT;2419 }2420 2421 return 0;2422}2423EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);2424 2425static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,2426 const struct hisi_sas_hw *hw)2427{2428 struct resource *res;2429 struct Scsi_Host *shost;2430 struct hisi_hba *hisi_hba;2431 struct device *dev = &pdev->dev;2432 int error;2433 2434 shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));2435 if (!shost) {2436 dev_err(dev, "scsi host alloc failed\n");2437 return NULL;2438 }2439 hisi_hba = shost_priv(shost);2440 2441 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);2442 hisi_hba->hw = hw;2443 hisi_hba->dev = dev;2444 hisi_hba->platform_dev = pdev;2445 hisi_hba->shost = shost;2446 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;2447 2448 timer_setup(&hisi_hba->timer, NULL, 0);2449 2450 if (hisi_sas_get_fw_info(hisi_hba) < 0)2451 goto err_out;2452 2453 error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));2454 if (error) {2455 dev_err(dev, "No usable DMA addressing method\n");2456 goto err_out;2457 }2458 2459 hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);2460 if (IS_ERR(hisi_hba->regs))2461 goto err_out;2462 2463 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);2464 if (res) {2465 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);2466 if (IS_ERR(hisi_hba->sgpio_regs))2467 goto err_out;2468 }2469 2470 if (hisi_sas_alloc(hisi_hba)) {2471 hisi_sas_free(hisi_hba);2472 goto err_out;2473 }2474 2475 return shost;2476err_out:2477 scsi_host_put(shost);2478 dev_err(dev, "shost alloc failed\n");2479 return NULL;2480}2481 2482static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)2483{2484 if (hisi_hba->hw->interrupt_preinit)2485 return hisi_hba->hw->interrupt_preinit(hisi_hba);2486 return 0;2487}2488 2489int hisi_sas_probe(struct platform_device *pdev,2490 const struct hisi_sas_hw *hw)2491{2492 struct Scsi_Host *shost;2493 struct hisi_hba *hisi_hba;2494 struct device *dev = &pdev->dev;2495 struct asd_sas_phy **arr_phy;2496 struct asd_sas_port **arr_port;2497 struct sas_ha_struct *sha;2498 int rc, phy_nr, port_nr, i;2499 2500 shost = hisi_sas_shost_alloc(pdev, hw);2501 if (!shost)2502 return -ENOMEM;2503 2504 sha = SHOST_TO_SAS_HA(shost);2505 hisi_hba = shost_priv(shost);2506 platform_set_drvdata(pdev, sha);2507 2508 phy_nr = port_nr = hisi_hba->n_phy;2509 2510 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);2511 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);2512 if (!arr_phy || !arr_port) {2513 rc = -ENOMEM;2514 goto err_out_ha;2515 }2516 2517 sha->sas_phy = arr_phy;2518 sha->sas_port = arr_port;2519 sha->lldd_ha = hisi_hba;2520 2521 shost->transportt = hisi_sas_stt;2522 shost->max_id = HISI_SAS_MAX_DEVICES;2523 shost->max_lun = ~0;2524 shost->max_channel = 1;2525 shost->max_cmd_len = 16;2526 if (hisi_hba->hw->slot_index_alloc) {2527 shost->can_queue = HISI_SAS_MAX_COMMANDS;2528 shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;2529 } else {2530 shost->can_queue = HISI_SAS_UNRESERVED_IPTT;2531 shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;2532 }2533 2534 sha->sas_ha_name = DRV_NAME;2535 sha->dev = hisi_hba->dev;2536 sha->sas_addr = &hisi_hba->sas_addr[0];2537 sha->num_phys = hisi_hba->n_phy;2538 sha->shost = hisi_hba->shost;2539 2540 for (i = 0; i < hisi_hba->n_phy; i++) {2541 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;2542 sha->sas_port[i] = &hisi_hba->port[i].sas_port;2543 }2544 2545 rc = hisi_sas_interrupt_preinit(hisi_hba);2546 if (rc)2547 goto err_out_ha;2548 2549 rc = scsi_add_host(shost, &pdev->dev);2550 if (rc)2551 goto err_out_ha;2552 2553 rc = sas_register_ha(sha);2554 if (rc)2555 goto err_out_register_ha;2556 2557 rc = hisi_hba->hw->hw_init(hisi_hba);2558 if (rc)2559 goto err_out_hw_init;2560 2561 scsi_scan_host(shost);2562 2563 return 0;2564 2565err_out_hw_init:2566 sas_unregister_ha(sha);2567err_out_register_ha:2568 scsi_remove_host(shost);2569err_out_ha:2570 hisi_sas_free(hisi_hba);2571 scsi_host_put(shost);2572 return rc;2573}2574EXPORT_SYMBOL_GPL(hisi_sas_probe);2575 2576void hisi_sas_remove(struct platform_device *pdev)2577{2578 struct sas_ha_struct *sha = platform_get_drvdata(pdev);2579 struct hisi_hba *hisi_hba = sha->lldd_ha;2580 struct Scsi_Host *shost = sha->shost;2581 2582 del_timer_sync(&hisi_hba->timer);2583 2584 sas_unregister_ha(sha);2585 sas_remove_host(shost);2586 2587 hisi_sas_free(hisi_hba);2588 scsi_host_put(shost);2589}2590EXPORT_SYMBOL_GPL(hisi_sas_remove);2591 2592#if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)2593#define DEBUGFS_ENABLE_DEFAULT "enabled"2594bool hisi_sas_debugfs_enable = true;2595u32 hisi_sas_debugfs_dump_count = 50;2596#else2597#define DEBUGFS_ENABLE_DEFAULT "disabled"2598bool hisi_sas_debugfs_enable;2599u32 hisi_sas_debugfs_dump_count = 1;2600#endif2601 2602EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);2603module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);2604MODULE_PARM_DESC(hisi_sas_debugfs_enable,2605 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");2606 2607EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);2608module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);2609MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");2610 2611struct dentry *hisi_sas_debugfs_dir;2612EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);2613 2614static __init int hisi_sas_init(void)2615{2616 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);2617 if (!hisi_sas_stt)2618 return -ENOMEM;2619 2620 if (hisi_sas_debugfs_enable) {2621 hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);2622 if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {2623 pr_info("hisi_sas: Limiting debugfs dump count\n");2624 hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;2625 }2626 }2627 2628 return 0;2629}2630 2631static __exit void hisi_sas_exit(void)2632{2633 sas_release_transport(hisi_sas_stt);2634 2635 if (hisi_sas_debugfs_enable)2636 debugfs_remove(hisi_sas_debugfs_dir);2637}2638 2639module_init(hisi_sas_init);2640module_exit(hisi_sas_exit);2641 2642MODULE_LICENSE("GPL");2643MODULE_AUTHOR("John Garry <john.garry@huawei.com>");2644MODULE_DESCRIPTION("HISILICON SAS controller driver");2645MODULE_ALIAS("platform:" DRV_NAME);2646