hisi_sas_main.c

   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 LINK_RATE_BIT_MASK 2
  11#define FIS_BUF_SIZE 20
  12#define WAIT_CMD_COMPLETE_DELAY 100
  13#define WAIT_CMD_COMPLETE_TMROUT 5000
  14#define DELAY_FOR_LINK_READY 2000
  15#define BLK_CNT_OPTIMIZE_MARK 64
  16#define HZ_TO_MHZ 1000000
  17#define DELAY_FOR_SOFTRESET_MAX 1000
  18#define DELAY_FOR_SOFTRESET_MIN 900
  19
  20#define DEV_IS_GONE(dev) \
  21	((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
  22
  23static int hisi_sas_softreset_ata_disk(struct domain_device *device);
  24static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
  25				void *funcdata);
  26static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
  27				  struct domain_device *device);
  28static void hisi_sas_dev_gone(struct domain_device *device);
  29
  30struct hisi_sas_internal_abort_data {
  31	bool rst_ha_timeout; /* reset the HA for timeout */
  32};
  33
  34static u8 hisi_sas_get_ata_protocol_from_tf(struct ata_queued_cmd *qc)
  35{
  36	if (!qc)
  37		return HISI_SAS_SATA_PROTOCOL_PIO;
  38
  39	switch (qc->tf.protocol) {
  40	case ATA_PROT_NODATA:
  41		return HISI_SAS_SATA_PROTOCOL_NONDATA;
  42	case ATA_PROT_PIO:
  43		return HISI_SAS_SATA_PROTOCOL_PIO;
  44	case ATA_PROT_DMA:
  45		return HISI_SAS_SATA_PROTOCOL_DMA;
  46	case ATA_PROT_NCQ_NODATA:
  47	case ATA_PROT_NCQ:
  48		return HISI_SAS_SATA_PROTOCOL_FPDMA;
  49	default:
  50		return HISI_SAS_SATA_PROTOCOL_PIO;
  51	}
  52}
  53
  54u8 hisi_sas_get_ata_protocol(struct sas_task *task)
  55{
  56	struct host_to_dev_fis *fis = &task->ata_task.fis;
  57	struct ata_queued_cmd *qc = task->uldd_task;
  58	int direction = task->data_dir;
  59
  60	switch (fis->command) {
  61	case ATA_CMD_FPDMA_WRITE:
  62	case ATA_CMD_FPDMA_READ:
  63	case ATA_CMD_FPDMA_RECV:
  64	case ATA_CMD_FPDMA_SEND:
  65	case ATA_CMD_NCQ_NON_DATA:
  66		return HISI_SAS_SATA_PROTOCOL_FPDMA;
  67
  68	case ATA_CMD_DOWNLOAD_MICRO:
  69	case ATA_CMD_ID_ATA:
  70	case ATA_CMD_PMP_READ:
  71	case ATA_CMD_READ_LOG_EXT:
  72	case ATA_CMD_PIO_READ:
  73	case ATA_CMD_PIO_READ_EXT:
  74	case ATA_CMD_PMP_WRITE:
  75	case ATA_CMD_WRITE_LOG_EXT:
  76	case ATA_CMD_PIO_WRITE:
  77	case ATA_CMD_PIO_WRITE_EXT:
  78		return HISI_SAS_SATA_PROTOCOL_PIO;
  79
  80	case ATA_CMD_DSM:
  81	case ATA_CMD_DOWNLOAD_MICRO_DMA:
  82	case ATA_CMD_PMP_READ_DMA:
  83	case ATA_CMD_PMP_WRITE_DMA:
  84	case ATA_CMD_READ:
  85	case ATA_CMD_READ_EXT:
  86	case ATA_CMD_READ_LOG_DMA_EXT:
  87	case ATA_CMD_READ_STREAM_DMA_EXT:
  88	case ATA_CMD_TRUSTED_RCV_DMA:
  89	case ATA_CMD_TRUSTED_SND_DMA:
  90	case ATA_CMD_WRITE:
  91	case ATA_CMD_WRITE_EXT:
  92	case ATA_CMD_WRITE_FUA_EXT:
  93	case ATA_CMD_WRITE_QUEUED:
  94	case ATA_CMD_WRITE_LOG_DMA_EXT:
  95	case ATA_CMD_WRITE_STREAM_DMA_EXT:
  96	case ATA_CMD_ZAC_MGMT_IN:
  97		return HISI_SAS_SATA_PROTOCOL_DMA;
  98
  99	case ATA_CMD_CHK_POWER:
 100	case ATA_CMD_DEV_RESET:
 101	case ATA_CMD_EDD:
 102	case ATA_CMD_FLUSH:
 103	case ATA_CMD_FLUSH_EXT:
 104	case ATA_CMD_VERIFY:
 105	case ATA_CMD_VERIFY_EXT:
 106	case ATA_CMD_SET_FEATURES:
 107	case ATA_CMD_STANDBY:
 108	case ATA_CMD_STANDBYNOW1:
 109	case ATA_CMD_ZAC_MGMT_OUT:
 110		return HISI_SAS_SATA_PROTOCOL_NONDATA;
 111
 112	case ATA_CMD_SET_MAX:
 113		switch (fis->features) {
 114		case ATA_SET_MAX_PASSWD:
 115		case ATA_SET_MAX_LOCK:
 116			return HISI_SAS_SATA_PROTOCOL_PIO;
 117
 118		case ATA_SET_MAX_PASSWD_DMA:
 119		case ATA_SET_MAX_UNLOCK_DMA:
 120			return HISI_SAS_SATA_PROTOCOL_DMA;
 121
 122		default:
 123			return HISI_SAS_SATA_PROTOCOL_NONDATA;
 124		}
 125
 126	default:
 127		if (direction == DMA_NONE)
 128			return HISI_SAS_SATA_PROTOCOL_NONDATA;
 129		return hisi_sas_get_ata_protocol_from_tf(qc);
 130	}
 131}
 132EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
 133
 134void hisi_sas_sata_done(struct sas_task *task,
 135			    struct hisi_sas_slot *slot)
 136{
 137	struct task_status_struct *ts = &task->task_status;
 138	struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
 139	struct hisi_sas_status_buffer *status_buf =
 140			hisi_sas_status_buf_addr_mem(slot);
 141	u8 *iu = &status_buf->iu[0];
 142	struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
 143
 144	resp->frame_len = sizeof(struct dev_to_host_fis);
 145	memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
 146
 147	ts->buf_valid_size = sizeof(*resp);
 148}
 149EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
 150
 151/*
 152 * This function assumes linkrate mask fits in 8 bits, which it
 153 * does for all HW versions supported.
 154 */
 155u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
 156{
 157	u8 rate = 0;
 158	int i;
 159
 160	max -= SAS_LINK_RATE_1_5_GBPS;
 161	for (i = 0; i <= max; i++)
 162		rate |= 1 << (i * LINK_RATE_BIT_MASK);
 163	return rate;
 164}
 165EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
 166
 167static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
 168{
 169	return device->port->ha->lldd_ha;
 170}
 171
 172struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
 173{
 174	return container_of(sas_port, struct hisi_sas_port, sas_port);
 175}
 176EXPORT_SYMBOL_GPL(to_hisi_sas_port);
 177
 178void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
 179{
 180	int phy_no;
 181
 182	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
 183		hisi_sas_phy_enable(hisi_hba, phy_no, 0);
 184}
 185EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
 186
 187static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
 188{
 189	void *bitmap = hisi_hba->slot_index_tags;
 190
 191	__clear_bit(slot_idx, bitmap);
 192}
 193
 194static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
 195{
 196	if (hisi_hba->hw->slot_index_alloc ||
 197	    slot_idx < HISI_SAS_RESERVED_IPTT) {
 198		spin_lock(&hisi_hba->lock);
 199		hisi_sas_slot_index_clear(hisi_hba, slot_idx);
 200		spin_unlock(&hisi_hba->lock);
 201	}
 202}
 203
 204static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 205{
 206	void *bitmap = hisi_hba->slot_index_tags;
 207
 208	__set_bit(slot_idx, bitmap);
 209}
 210
 211static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
 212				     struct request *rq)
 213{
 214	int index;
 215	void *bitmap = hisi_hba->slot_index_tags;
 216
 217	if (rq)
 218		return rq->tag + HISI_SAS_RESERVED_IPTT;
 219
 220	spin_lock(&hisi_hba->lock);
 221	index = find_next_zero_bit(bitmap, HISI_SAS_RESERVED_IPTT,
 222				   hisi_hba->last_slot_index + 1);
 223	if (index >= HISI_SAS_RESERVED_IPTT) {
 224		index = find_next_zero_bit(bitmap,
 225				HISI_SAS_RESERVED_IPTT,
 226				0);
 227		if (index >= HISI_SAS_RESERVED_IPTT) {
 228			spin_unlock(&hisi_hba->lock);
 229			return -SAS_QUEUE_FULL;
 230		}
 231	}
 232	hisi_sas_slot_index_set(hisi_hba, index);
 233	hisi_hba->last_slot_index = index;
 234	spin_unlock(&hisi_hba->lock);
 235
 236	return index;
 237}
 238
 239void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
 240			     struct hisi_sas_slot *slot, bool need_lock)
 241{
 242	int device_id = slot->device_id;
 243	struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
 244
 245	if (task) {
 246		struct device *dev = hisi_hba->dev;
 247
 248		if (!task->lldd_task)
 249			return;
 250
 251		task->lldd_task = NULL;
 252
 253		if (!sas_protocol_ata(task->task_proto)) {
 254			if (slot->n_elem) {
 255				if (task->task_proto & SAS_PROTOCOL_SSP)
 256					dma_unmap_sg(dev, task->scatter,
 257						     task->num_scatter,
 258						     task->data_dir);
 259				else
 260					dma_unmap_sg(dev, &task->smp_task.smp_req,
 261						     1, DMA_TO_DEVICE);
 262			}
 263			if (slot->n_elem_dif) {
 264				struct sas_ssp_task *ssp_task = &task->ssp_task;
 265				struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 266
 267				dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 268					     scsi_prot_sg_count(scsi_cmnd),
 269					     task->data_dir);
 270			}
 271		}
 272	}
 273
 274	if (need_lock) {
 275		spin_lock(&sas_dev->lock);
 276		list_del_init(&slot->entry);
 277		spin_unlock(&sas_dev->lock);
 278	} else {
 279		list_del_init(&slot->entry);
 280	}
 281
 282	memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
 283
 284	hisi_sas_slot_index_free(hisi_hba, slot->idx);
 285}
 286EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
 287
 288static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
 289				  struct hisi_sas_slot *slot)
 290{
 291	hisi_hba->hw->prep_smp(hisi_hba, slot);
 292}
 293
 294static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
 295				  struct hisi_sas_slot *slot)
 296{
 297	hisi_hba->hw->prep_ssp(hisi_hba, slot);
 298}
 299
 300static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
 301				  struct hisi_sas_slot *slot)
 302{
 303	hisi_hba->hw->prep_stp(hisi_hba, slot);
 304}
 305
 306static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
 307				     struct hisi_sas_slot *slot)
 308{
 309	hisi_hba->hw->prep_abort(hisi_hba, slot);
 310}
 311
 312static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
 313			       struct sas_task *task, int n_elem)
 314{
 315	struct device *dev = hisi_hba->dev;
 316
 317	if (!sas_protocol_ata(task->task_proto) && n_elem) {
 318		if (task->num_scatter) {
 319			dma_unmap_sg(dev, task->scatter, task->num_scatter,
 320				     task->data_dir);
 321		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
 322			dma_unmap_sg(dev, &task->smp_task.smp_req,
 323				     1, DMA_TO_DEVICE);
 324		}
 325	}
 326}
 327
 328static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
 329			    struct sas_task *task, int *n_elem)
 330{
 331	struct device *dev = hisi_hba->dev;
 332	int rc;
 333
 334	if (sas_protocol_ata(task->task_proto)) {
 335		*n_elem = task->num_scatter;
 336	} else {
 337		unsigned int req_len;
 338
 339		if (task->num_scatter) {
 340			*n_elem = dma_map_sg(dev, task->scatter,
 341					     task->num_scatter, task->data_dir);
 342			if (!*n_elem) {
 343				rc = -ENOMEM;
 344				goto prep_out;
 345			}
 346		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
 347			*n_elem = dma_map_sg(dev, &task->smp_task.smp_req,
 348					     1, DMA_TO_DEVICE);
 349			if (!*n_elem) {
 350				rc = -ENOMEM;
 351				goto prep_out;
 352			}
 353			req_len = sg_dma_len(&task->smp_task.smp_req);
 354			if (req_len & 0x3) {
 355				rc = -EINVAL;
 356				goto err_out_dma_unmap;
 357			}
 358		}
 359	}
 360
 361	if (*n_elem > HISI_SAS_SGE_PAGE_CNT) {
 362		dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT\n",
 363			*n_elem);
 364		rc = -EINVAL;
 365		goto err_out_dma_unmap;
 366	}
 367	return 0;
 368
 369err_out_dma_unmap:
 370	/* It would be better to call dma_unmap_sg() here, but it's messy */
 371	hisi_sas_dma_unmap(hisi_hba, task, *n_elem);
 372prep_out:
 373	return rc;
 374}
 375
 376static void hisi_sas_dif_dma_unmap(struct hisi_hba *hisi_hba,
 377				   struct sas_task *task, int n_elem_dif)
 378{
 379	struct device *dev = hisi_hba->dev;
 380
 381	if (n_elem_dif) {
 382		struct sas_ssp_task *ssp_task = &task->ssp_task;
 383		struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 384
 385		dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 386			     scsi_prot_sg_count(scsi_cmnd),
 387			     task->data_dir);
 388	}
 389}
 390
 391static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
 392				int *n_elem_dif, struct sas_task *task)
 393{
 394	struct device *dev = hisi_hba->dev;
 395	struct sas_ssp_task *ssp_task;
 396	struct scsi_cmnd *scsi_cmnd;
 397	int rc;
 398
 399	if (task->num_scatter) {
 400		ssp_task = &task->ssp_task;
 401		scsi_cmnd = ssp_task->cmd;
 402
 403		if (scsi_prot_sg_count(scsi_cmnd)) {
 404			*n_elem_dif = dma_map_sg(dev,
 405						 scsi_prot_sglist(scsi_cmnd),
 406						 scsi_prot_sg_count(scsi_cmnd),
 407						 task->data_dir);
 408
 409			if (!*n_elem_dif)
 410				return -ENOMEM;
 411
 412			if (*n_elem_dif > HISI_SAS_SGE_DIF_PAGE_CNT) {
 413				dev_err(dev, "task prep: n_elem_dif(%d) too large\n",
 414					*n_elem_dif);
 415				rc = -EINVAL;
 416				goto err_out_dif_dma_unmap;
 417			}
 418		}
 419	}
 420
 421	return 0;
 422
 423err_out_dif_dma_unmap:
 424	dma_unmap_sg(dev, scsi_prot_sglist(scsi_cmnd),
 425		     scsi_prot_sg_count(scsi_cmnd), task->data_dir);
 426	return rc;
 427}
 428
 429static
 430void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
 431			   struct hisi_sas_slot *slot,
 432			   struct hisi_sas_dq *dq,
 433			   struct hisi_sas_device *sas_dev)
 434{
 435	struct hisi_sas_cmd_hdr *cmd_hdr_base;
 436	int dlvry_queue_slot, dlvry_queue;
 437	struct sas_task *task = slot->task;
 438	int wr_q_index;
 439
 440	spin_lock(&dq->lock);
 441	wr_q_index = dq->wr_point;
 442	dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
 443	list_add_tail(&slot->delivery, &dq->list);
 444	spin_unlock(&dq->lock);
 445	spin_lock(&sas_dev->lock);
 446	list_add_tail(&slot->entry, &sas_dev->list);
 447	spin_unlock(&sas_dev->lock);
 448
 449	dlvry_queue = dq->id;
 450	dlvry_queue_slot = wr_q_index;
 451
 452	slot->device_id = sas_dev->device_id;
 453	slot->dlvry_queue = dlvry_queue;
 454	slot->dlvry_queue_slot = dlvry_queue_slot;
 455	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
 456	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
 457
 458	task->lldd_task = slot;
 459
 460	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
 461	memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
 462	memset(hisi_sas_status_buf_addr_mem(slot), 0,
 463	       sizeof(struct hisi_sas_err_record));
 464
 465	switch (task->task_proto) {
 466	case SAS_PROTOCOL_SMP:
 467		hisi_sas_task_prep_smp(hisi_hba, slot);
 468		break;
 469	case SAS_PROTOCOL_SSP:
 470		hisi_sas_task_prep_ssp(hisi_hba, slot);
 471		break;
 472	case SAS_PROTOCOL_SATA:
 473	case SAS_PROTOCOL_STP:
 474	case SAS_PROTOCOL_STP_ALL:
 475		hisi_sas_task_prep_ata(hisi_hba, slot);
 476		break;
 477	case SAS_PROTOCOL_INTERNAL_ABORT:
 478		hisi_sas_task_prep_abort(hisi_hba, slot);
 479		break;
 480	default:
 481		return;
 482	}
 483
 484	/* Make slot memories observable before marking as ready */
 485	smp_wmb();
 486	WRITE_ONCE(slot->ready, 1);
 487
 488	spin_lock(&dq->lock);
 489	hisi_hba->hw->start_delivery(dq);
 490	spin_unlock(&dq->lock);
 491}
 492
 493static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 494{
 495	int n_elem = 0, n_elem_dif = 0;
 496	struct domain_device *device = task->dev;
 497	struct asd_sas_port *sas_port = device->port;
 498	struct hisi_sas_device *sas_dev = device->lldd_dev;
 499	bool internal_abort = sas_is_internal_abort(task);
 500	struct hisi_sas_dq *dq = NULL;
 501	struct hisi_sas_port *port;
 502	struct hisi_hba *hisi_hba;
 503	struct hisi_sas_slot *slot;
 504	struct request *rq = NULL;
 505	struct device *dev;
 506	int rc;
 507
 508	if (!sas_port) {
 509		struct task_status_struct *ts = &task->task_status;
 510
 511		ts->resp = SAS_TASK_UNDELIVERED;
 512		ts->stat = SAS_PHY_DOWN;
 513		/*
 514		 * libsas will use dev->port, should
 515		 * not call task_done for sata
 516		 */
 517		if (device->dev_type != SAS_SATA_DEV && !internal_abort)
 518			task->task_done(task);
 519		return -ECOMM;
 520	}
 521
 522	hisi_hba = dev_to_hisi_hba(device);
 523	dev = hisi_hba->dev;
 524
 525	switch (task->task_proto) {
 526	case SAS_PROTOCOL_SSP:
 527	case SAS_PROTOCOL_SMP:
 528	case SAS_PROTOCOL_SATA:
 529	case SAS_PROTOCOL_STP:
 530	case SAS_PROTOCOL_STP_ALL:
 531		if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
 532			if (!gfpflags_allow_blocking(gfp_flags))
 533				return -EINVAL;
 534
 535			down(&hisi_hba->sem);
 536			up(&hisi_hba->sem);
 537		}
 538
 539		if (DEV_IS_GONE(sas_dev)) {
 540			if (sas_dev)
 541				dev_info(dev, "task prep: device %d not ready\n",
 542					 sas_dev->device_id);
 543			else
 544				dev_info(dev, "task prep: device %016llx not ready\n",
 545					 SAS_ADDR(device->sas_addr));
 546
 547			return -ECOMM;
 548		}
 549
 550		port = to_hisi_sas_port(sas_port);
 551		if (!port->port_attached) {
 552			dev_info(dev, "task prep: %s port%d not attach device\n",
 553				 dev_is_sata(device) ? "SATA/STP" : "SAS",
 554				 device->port->id);
 555
 556				return -ECOMM;
 557		}
 558
 559		rq = sas_task_find_rq(task);
 560		if (rq) {
 561			unsigned int dq_index;
 562			u32 blk_tag;
 563
 564			blk_tag = blk_mq_unique_tag(rq);
 565			dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 566			dq = &hisi_hba->dq[dq_index];
 567		} else {
 568			int queue;
 569
 570			if (hisi_hba->iopoll_q_cnt) {
 571				/*
 572				 * Use interrupt queue (queue 0) to deliver and complete
 573				 * internal IOs of libsas or libata when there is at least
 574				 * one iopoll queue
 575				 */
 576				queue = 0;
 577			} else {
 578				struct Scsi_Host *shost = hisi_hba->shost;
 579				struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
 580
 581				queue = qmap->mq_map[raw_smp_processor_id()];
 582			}
 583			dq = &hisi_hba->dq[queue];
 584		}
 585		break;
 586	case SAS_PROTOCOL_INTERNAL_ABORT:
 587		if (!hisi_hba->hw->prep_abort)
 588			return TMF_RESP_FUNC_FAILED;
 589
 590		if (test_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags))
 591			return -EIO;
 592
 593		hisi_hba = dev_to_hisi_hba(device);
 594
 595		if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
 596			return -EINVAL;
 597
 598		port = to_hisi_sas_port(sas_port);
 599		dq = &hisi_hba->dq[task->abort_task.qid];
 600		break;
 601	default:
 602		dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
 603			task->task_proto);
 604		return -EINVAL;
 605	}
 606
 607	rc = hisi_sas_dma_map(hisi_hba, task, &n_elem);
 608	if (rc < 0)
 609		goto prep_out;
 610
 611	if (!sas_protocol_ata(task->task_proto)) {
 612		rc = hisi_sas_dif_dma_map(hisi_hba, &n_elem_dif, task);
 613		if (rc < 0)
 614			goto err_out_dma_unmap;
 615	}
 616
 617	if (!internal_abort && hisi_hba->hw->slot_index_alloc)
 618		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 619	else
 620		rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
 621
 622	if (rc < 0)
 623		goto err_out_dif_dma_unmap;
 624
 625	slot = &hisi_hba->slot_info[rc];
 626	slot->n_elem = n_elem;
 627	slot->n_elem_dif = n_elem_dif;
 628	slot->task = task;
 629	slot->port = port;
 630
 631	slot->tmf = task->tmf;
 632	slot->is_internal = !!task->tmf || internal_abort;
 633
 634	/* protect task_prep and start_delivery sequence */
 635	hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev);
 636
 637	return 0;
 638
 639err_out_dif_dma_unmap:
 640	if (!sas_protocol_ata(task->task_proto))
 641		hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
 642err_out_dma_unmap:
 643	hisi_sas_dma_unmap(hisi_hba, task, n_elem);
 644prep_out:
 645	dev_err(dev, "task exec: failed[%d]!\n", rc);
 646	return rc;
 647}
 648
 649static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no,
 650				 gfp_t gfp_flags)
 651{
 652	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 653	struct asd_sas_phy *sas_phy = &phy->sas_phy;
 654
 655	if (!phy->phy_attached)
 656		return;
 657
 658	sas_notify_phy_event(sas_phy, PHYE_OOB_DONE, gfp_flags);
 659
 660	if (sas_phy->phy) {
 661		struct sas_phy *sphy = sas_phy->phy;
 662
 663		sphy->negotiated_linkrate = sas_phy->linkrate;
 664		sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
 665		sphy->maximum_linkrate_hw =
 666			hisi_hba->hw->phy_get_max_linkrate();
 667		if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
 668			sphy->minimum_linkrate = phy->minimum_linkrate;
 669
 670		if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
 671			sphy->maximum_linkrate = phy->maximum_linkrate;
 672	}
 673
 674	if (phy->phy_type & PORT_TYPE_SAS) {
 675		struct sas_identify_frame *id;
 676
 677		id = (struct sas_identify_frame *)phy->frame_rcvd;
 678		id->dev_type = phy->identify.device_type;
 679		id->initiator_bits = SAS_PROTOCOL_ALL;
 680		id->target_bits = phy->identify.target_port_protocols;
 681	} else if (phy->phy_type & PORT_TYPE_SATA) {
 682		/* Nothing */
 683	}
 684
 685	sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
 686	sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
 687}
 688
 689static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
 690{
 691	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 692	struct hisi_sas_device *sas_dev = NULL;
 693	int last = hisi_hba->last_dev_id;
 694	int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
 695	int i;
 696
 697	spin_lock(&hisi_hba->lock);
 698	for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
 699		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
 700			int queue = i % hisi_hba->queue_count;
 701			struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
 702
 703			hisi_hba->devices[i].device_id = i;
 704			sas_dev = &hisi_hba->devices[i];
 705			sas_dev->dev_status = HISI_SAS_DEV_INIT;
 706			sas_dev->dev_type = device->dev_type;
 707			sas_dev->hisi_hba = hisi_hba;
 708			sas_dev->sas_device = device;
 709			sas_dev->dq = dq;
 710			spin_lock_init(&sas_dev->lock);
 711			INIT_LIST_HEAD(&hisi_hba->devices[i].list);
 712			break;
 713		}
 714		i++;
 715	}
 716	hisi_hba->last_dev_id = i;
 717	spin_unlock(&hisi_hba->lock);
 718
 719	return sas_dev;
 720}
 721
 722static void hisi_sas_sync_poll_cq(struct hisi_sas_cq *cq)
 723{
 724	/* make sure CQ entries being processed are processed to completion */
 725	spin_lock(&cq->poll_lock);
 726	spin_unlock(&cq->poll_lock);
 727}
 728
 729static bool hisi_sas_queue_is_poll(struct hisi_sas_cq *cq)
 730{
 731	struct hisi_hba *hisi_hba = cq->hisi_hba;
 732
 733	if (cq->id < hisi_hba->queue_count - hisi_hba->iopoll_q_cnt)
 734		return false;
 735	return true;
 736}
 737
 738static void hisi_sas_sync_cq(struct hisi_sas_cq *cq)
 739{
 740	if (hisi_sas_queue_is_poll(cq))
 741		hisi_sas_sync_poll_cq(cq);
 742	else
 743		synchronize_irq(cq->irq_no);
 744}
 745
 746void hisi_sas_sync_poll_cqs(struct hisi_hba *hisi_hba)
 747{
 748	int i;
 749
 750	for (i = 0; i < hisi_hba->queue_count; i++) {
 751		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
 752
 753		if (hisi_sas_queue_is_poll(cq))
 754			hisi_sas_sync_poll_cq(cq);
 755	}
 756}
 757EXPORT_SYMBOL_GPL(hisi_sas_sync_poll_cqs);
 758
 759void hisi_sas_sync_cqs(struct hisi_hba *hisi_hba)
 760{
 761	int i;
 762
 763	for (i = 0; i < hisi_hba->queue_count; i++) {
 764		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
 765
 766		hisi_sas_sync_cq(cq);
 767	}
 768}
 769EXPORT_SYMBOL_GPL(hisi_sas_sync_cqs);
 770
 771static void hisi_sas_tmf_aborted(struct sas_task *task)
 772{
 773	struct hisi_sas_slot *slot = task->lldd_task;
 774	struct domain_device *device = task->dev;
 775	struct hisi_sas_device *sas_dev = device->lldd_dev;
 776	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
 777
 778	if (slot) {
 779		struct hisi_sas_cq *cq =
 780			   &hisi_hba->cq[slot->dlvry_queue];
 781		/*
 782		 * sync irq or poll queue to avoid free'ing task
 783		 * before using task in IO completion
 784		 */
 785		hisi_sas_sync_cq(cq);
 786		slot->task = NULL;
 787	}
 788}
 789
 790#define HISI_SAS_DISK_RECOVER_CNT 3
 791static int hisi_sas_init_device(struct domain_device *device)
 792{
 793	int rc = TMF_RESP_FUNC_COMPLETE;
 794	struct scsi_lun lun;
 795	int retry = HISI_SAS_DISK_RECOVER_CNT;
 796	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 797
 798	switch (device->dev_type) {
 799	case SAS_END_DEVICE:
 800		int_to_scsilun(0, &lun);
 801
 802		while (retry-- > 0) {
 803			rc = sas_abort_task_set(device, lun.scsi_lun);
 804			if (rc == TMF_RESP_FUNC_COMPLETE) {
 805				hisi_sas_release_task(hisi_hba, device);
 806				break;
 807			}
 808		}
 809		break;
 810	case SAS_SATA_DEV:
 811	case SAS_SATA_PM:
 812	case SAS_SATA_PM_PORT:
 813	case SAS_SATA_PENDING:
 814		/*
 815		 * If an expander is swapped when a SATA disk is attached then
 816		 * we should issue a hard reset to clear previous affiliation
 817		 * of STP target port, see SPL (chapter 6.19.4).
 818		 *
 819		 * However we don't need to issue a hard reset here for these
 820		 * reasons:
 821		 * a. When probing the device, libsas/libata already issues a
 822		 * hard reset in sas_probe_sata() -> ata_port_probe().
 823		 * Note that in hisi_sas_debug_I_T_nexus_reset() we take care
 824		 * to issue a hard reset by checking the dev status (== INIT).
 825		 * b. When resetting the controller, this is simply unnecessary.
 826		 */
 827		while (retry-- > 0) {
 828			rc = hisi_sas_softreset_ata_disk(device);
 829			if (!rc)
 830				break;
 831		}
 832		break;
 833	default:
 834		break;
 835	}
 836
 837	return rc;
 838}
 839
 840int hisi_sas_sdev_init(struct scsi_device *sdev)
 841{
 842	struct domain_device *ddev = sdev_to_domain_dev(sdev);
 843	struct hisi_sas_device *sas_dev = ddev->lldd_dev;
 844	int rc;
 845
 846	rc = sas_sdev_init(sdev);
 847	if (rc)
 848		return rc;
 849
 850	rc = hisi_sas_init_device(ddev);
 851	if (rc)
 852		return rc;
 853	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 854	return 0;
 855}
 856EXPORT_SYMBOL_GPL(hisi_sas_sdev_init);
 857
 858static int hisi_sas_dev_found(struct domain_device *device)
 859{
 860	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
 861	struct domain_device *parent_dev = device->parent;
 862	struct hisi_sas_device *sas_dev;
 863	struct device *dev = hisi_hba->dev;
 864	int rc;
 865
 866	if (hisi_hba->hw->alloc_dev)
 867		sas_dev = hisi_hba->hw->alloc_dev(device);
 868	else
 869		sas_dev = hisi_sas_alloc_dev(device);
 870	if (!sas_dev) {
 871		dev_err(dev, "fail alloc dev: max support %d devices\n",
 872			HISI_SAS_MAX_DEVICES);
 873		return -EINVAL;
 874	}
 875
 876	device->lldd_dev = sas_dev;
 877	hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
 878
 879	if (dev_parent_is_expander(device)) {
 880		int phy_no;
 881
 882		phy_no = sas_find_attached_phy_id(&parent_dev->ex_dev, device);
 883		if (phy_no < 0) {
 884			dev_info(dev, "dev found: no attached "
 885				 "dev:%016llx at ex:%016llx\n",
 886				 SAS_ADDR(device->sas_addr),
 887				 SAS_ADDR(parent_dev->sas_addr));
 888			rc = phy_no;
 889			goto err_out;
 890		}
 891	}
 892
 893	dev_info(dev, "dev[%d:%x] found\n",
 894		sas_dev->device_id, sas_dev->dev_type);
 895
 896	return 0;
 897
 898err_out:
 899	hisi_sas_dev_gone(device);
 900	return rc;
 901}
 902
 903int hisi_sas_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim)
 904{
 905	struct domain_device *dev = sdev_to_domain_dev(sdev);
 906	int ret = sas_sdev_configure(sdev, lim);
 907
 908	if (ret)
 909		return ret;
 910	if (!dev_is_sata(dev))
 911		sas_change_queue_depth(sdev, HISI_SAS_BLK_QUEUE_DEPTH);
 912
 913	return 0;
 914}
 915EXPORT_SYMBOL_GPL(hisi_sas_sdev_configure);
 916
 917void hisi_sas_scan_start(struct Scsi_Host *shost)
 918{
 919	struct hisi_hba *hisi_hba = shost_priv(shost);
 920
 921	hisi_hba->hw->phys_init(hisi_hba);
 922}
 923EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
 924
 925int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
 926{
 927	struct hisi_hba *hisi_hba = shost_priv(shost);
 928	struct sas_ha_struct *sha = &hisi_hba->sha;
 929
 930	/* Wait for PHY up interrupt to occur */
 931	if (time < HZ)
 932		return 0;
 933
 934	sas_drain_work(sha);
 935	return 1;
 936}
 937EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
 938
 939static void hisi_sas_phyup_work_common(struct work_struct *work,
 940		enum hisi_sas_phy_event event)
 941{
 942	struct hisi_sas_phy *phy =
 943		container_of(work, typeof(*phy), works[event]);
 944	struct hisi_hba *hisi_hba = phy->hisi_hba;
 945	struct asd_sas_phy *sas_phy = &phy->sas_phy;
 946	struct asd_sas_port *sas_port = sas_phy->port;
 947	struct hisi_sas_port *port = phy->port;
 948	struct device *dev = hisi_hba->dev;
 949	struct domain_device *port_dev;
 950	int phy_no = sas_phy->id;
 951
 952	if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) &&
 953	    sas_port && port && (port->id != phy->port_id)) {
 954		dev_info(dev, "phy%d's hw port id changed from %d to %llu\n",
 955				phy_no, port->id, phy->port_id);
 956		port_dev = sas_port->port_dev;
 957		if (port_dev && !dev_is_expander(port_dev->dev_type)) {
 958			/*
 959			 * Set the device state to gone to block
 960			 * sending IO to the device.
 961			 */
 962			set_bit(SAS_DEV_GONE, &port_dev->state);
 963			hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
 964			return;
 965		}
 966	}
 967
 968	phy->wait_phyup_cnt = 0;
 969	if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
 970		hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
 971	hisi_sas_bytes_dmaed(hisi_hba, phy_no, GFP_KERNEL);
 972}
 973
 974static void hisi_sas_phyup_work(struct work_struct *work)
 975{
 976	hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP);
 977}
 978
 979static void hisi_sas_linkreset_work(struct work_struct *work)
 980{
 981	struct hisi_sas_phy *phy =
 982		container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
 983	struct asd_sas_phy *sas_phy = &phy->sas_phy;
 984
 985	hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
 986}
 987
 988static void hisi_sas_phyup_pm_work(struct work_struct *work)
 989{
 990	struct hisi_sas_phy *phy =
 991		container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP_PM]);
 992	struct hisi_hba *hisi_hba = phy->hisi_hba;
 993	struct device *dev = hisi_hba->dev;
 994
 995	hisi_sas_phyup_work_common(work, HISI_PHYE_PHY_UP_PM);
 996	pm_runtime_put_sync(dev);
 997}
 998
 999static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
1000	[HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
1001	[HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
1002	[HISI_PHYE_PHY_UP_PM] = hisi_sas_phyup_pm_work,
1003};
1004
1005bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
1006				enum hisi_sas_phy_event event)
1007{
1008	struct hisi_hba *hisi_hba = phy->hisi_hba;
1009
1010	if (WARN_ON(event >= HISI_PHYES_NUM))
1011		return false;
1012
1013	return queue_work(hisi_hba->wq, &phy->works[event]);
1014}
1015EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
1016
1017static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
1018{
1019	struct hisi_sas_phy *phy = timer_container_of(phy, t, timer);
1020	struct hisi_hba *hisi_hba = phy->hisi_hba;
1021	struct device *dev = hisi_hba->dev;
1022	int phy_no = phy->sas_phy.id;
1023
1024	dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
1025	hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
1026}
1027
1028#define HISI_SAS_WAIT_PHYUP_RETRIES	10
1029
1030void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
1031{
1032	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1033	struct device *dev = hisi_hba->dev;
1034	unsigned long flags;
1035
1036	dev_dbg(dev, "phy%d OOB ready\n", phy_no);
1037	spin_lock_irqsave(&phy->lock, flags);
1038	if (phy->phy_attached) {
1039		spin_unlock_irqrestore(&phy->lock, flags);
1040		return;
1041	}
1042
1043	if (!timer_pending(&phy->timer)) {
1044		if (phy->wait_phyup_cnt < HISI_SAS_WAIT_PHYUP_RETRIES) {
1045			phy->wait_phyup_cnt++;
1046			phy->timer.expires = jiffies +
1047					     HISI_SAS_WAIT_PHYUP_TIMEOUT;
1048			add_timer(&phy->timer);
1049			spin_unlock_irqrestore(&phy->lock, flags);
1050			return;
1051		}
1052
1053		dev_warn(dev, "phy%d failed to come up %d times, giving up\n",
1054			 phy_no, phy->wait_phyup_cnt);
1055		phy->wait_phyup_cnt = 0;
1056	}
1057	spin_unlock_irqrestore(&phy->lock, flags);
1058}
1059
1060EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);
1061
1062static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
1063{
1064	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1065	struct asd_sas_phy *sas_phy = &phy->sas_phy;
1066	int i;
1067
1068	phy->hisi_hba = hisi_hba;
1069	phy->port = NULL;
1070	phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
1071	phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
1072	sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
1073	sas_phy->iproto = SAS_PROTOCOL_ALL;
1074	sas_phy->tproto = 0;
1075	sas_phy->role = PHY_ROLE_INITIATOR;
1076	sas_phy->oob_mode = OOB_NOT_CONNECTED;
1077	sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
1078	sas_phy->id = phy_no;
1079	sas_phy->sas_addr = &hisi_hba->sas_addr[0];
1080	sas_phy->frame_rcvd = &phy->frame_rcvd[0];
1081	sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
1082	sas_phy->lldd_phy = phy;
1083
1084	for (i = 0; i < HISI_PHYES_NUM; i++)
1085		INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
1086
1087	spin_lock_init(&phy->lock);
1088
1089	timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
1090}
1091
1092/* Wrapper to ensure we track hisi_sas_phy.enable properly */
1093void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable)
1094{
1095	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1096	struct asd_sas_phy *aphy = &phy->sas_phy;
1097	struct sas_phy *sphy = aphy->phy;
1098	unsigned long flags;
1099
1100	spin_lock_irqsave(&phy->lock, flags);
1101
1102	if (enable) {
1103		/* We may have been enabled already; if so, don't touch */
1104		if (!phy->enable)
1105			sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
1106		hisi_hba->hw->phy_start(hisi_hba, phy_no);
1107	} else {
1108		sphy->negotiated_linkrate = SAS_PHY_DISABLED;
1109		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
1110	}
1111	phy->enable = enable;
1112	spin_unlock_irqrestore(&phy->lock, flags);
1113}
1114EXPORT_SYMBOL_GPL(hisi_sas_phy_enable);
1115
1116static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
1117{
1118	struct hisi_sas_phy *phy = sas_phy->lldd_phy;
1119	struct asd_sas_port *sas_port = sas_phy->port;
1120	struct hisi_sas_port *port;
1121
1122	if (!sas_port)
1123		return;
1124
1125	port = to_hisi_sas_port(sas_port);
1126	port->port_attached = 1;
1127	port->id = phy->port_id;
1128	phy->port = port;
1129	sas_port->lldd_port = port;
1130}
1131
1132static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
1133				     struct hisi_sas_slot *slot, bool need_lock)
1134{
1135	if (task) {
1136		unsigned long flags;
1137		struct task_status_struct *ts;
1138
1139		ts = &task->task_status;
1140
1141		ts->resp = SAS_TASK_COMPLETE;
1142		ts->stat = SAS_ABORTED_TASK;
1143		spin_lock_irqsave(&task->task_state_lock, flags);
1144		task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
1145		if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
1146			task->task_state_flags |= SAS_TASK_STATE_DONE;
1147		spin_unlock_irqrestore(&task->task_state_lock, flags);
1148	}
1149
1150	hisi_sas_slot_task_free(hisi_hba, task, slot, need_lock);
1151}
1152
1153static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
1154			struct domain_device *device)
1155{
1156	struct hisi_sas_slot *slot, *slot2;
1157	struct hisi_sas_device *sas_dev = device->lldd_dev;
1158
1159	spin_lock(&sas_dev->lock);
1160	list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
1161		hisi_sas_do_release_task(hisi_hba, slot->task, slot, false);
1162
1163	spin_unlock(&sas_dev->lock);
1164}
1165
1166void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
1167{
1168	struct hisi_sas_device *sas_dev;
1169	struct domain_device *device;
1170	int i;
1171
1172	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1173		sas_dev = &hisi_hba->devices[i];
1174		device = sas_dev->sas_device;
1175
1176		if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
1177		    !device)
1178			continue;
1179
1180		hisi_sas_release_task(hisi_hba, device);
1181	}
1182}
1183EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
1184
1185static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
1186				struct domain_device *device)
1187{
1188	if (hisi_hba->hw->dereg_device)
1189		hisi_hba->hw->dereg_device(hisi_hba, device);
1190}
1191
1192static int
1193hisi_sas_internal_task_abort_dev(struct hisi_sas_device *sas_dev,
1194				 bool rst_ha_timeout)
1195{
1196	struct hisi_sas_internal_abort_data data = { rst_ha_timeout };
1197	struct domain_device *device = sas_dev->sas_device;
1198	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
1199	int i, rc;
1200
1201	for (i = 0; i < hisi_hba->cq_nvecs; i++) {
1202		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1203		const struct cpumask *mask = cq->irq_mask;
1204
1205		if (mask && !cpumask_intersects(cpu_online_mask, mask))
1206			continue;
1207		rc = sas_execute_internal_abort_dev(device, i, &data);
1208		if (rc)
1209			return rc;
1210	}
1211
1212	return 0;
1213}
1214
1215static void hisi_sas_dev_gone(struct domain_device *device)
1216{
1217	struct hisi_sas_device *sas_dev = device->lldd_dev;
1218	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1219	struct device *dev = hisi_hba->dev;
1220	int ret = 0;
1221
1222	dev_info(dev, "dev[%d:%x] is gone\n",
1223		 sas_dev->device_id, sas_dev->dev_type);
1224
1225	down(&hisi_hba->sem);
1226	if (!test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1227		hisi_sas_internal_task_abort_dev(sas_dev, true);
1228
1229		hisi_sas_dereg_device(hisi_hba, device);
1230
1231		ret = hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
1232		device->lldd_dev = NULL;
1233	}
1234
1235	if (hisi_hba->hw->free_device)
1236		hisi_hba->hw->free_device(sas_dev);
1237
1238	/* Don't mark it as SAS_PHY_UNUSED if failed to clear ITCT */
1239	if (!ret)
1240		sas_dev->dev_type = SAS_PHY_UNUSED;
1241	sas_dev->sas_device = NULL;
1242	up(&hisi_hba->sem);
1243}
1244
1245static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
1246			struct sas_phy_linkrates *r)
1247{
1248	struct sas_phy_linkrates _r;
1249
1250	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1251	struct asd_sas_phy *sas_phy = &phy->sas_phy;
1252	enum sas_linkrate min, max;
1253
1254	if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
1255		return -EINVAL;
1256
1257	if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1258		max = sas_phy->phy->maximum_linkrate;
1259		min = r->minimum_linkrate;
1260	} else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
1261		max = r->maximum_linkrate;
1262		min = sas_phy->phy->minimum_linkrate;
1263	} else
1264		return -EINVAL;
1265
1266	_r.maximum_linkrate = max;
1267	_r.minimum_linkrate = min;
1268
1269	sas_phy->phy->maximum_linkrate = max;
1270	sas_phy->phy->minimum_linkrate = min;
1271
1272	hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1273	msleep(HISI_SAS_DELAY_FOR_PHY_DISABLE);
1274	hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
1275	hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1276
1277	return 0;
1278}
1279
1280static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
1281				void *funcdata)
1282{
1283	struct hisi_sas_phy *phy = container_of(sas_phy,
1284			struct hisi_sas_phy, sas_phy);
1285	struct sas_ha_struct *sas_ha = sas_phy->ha;
1286	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1287	struct device *dev = hisi_hba->dev;
1288	DECLARE_COMPLETION_ONSTACK(completion);
1289	int phy_no = sas_phy->id;
1290	u8 sts = phy->phy_attached;
1291	int ret = 0;
1292
1293	down(&hisi_hba->sem);
1294	phy->reset_completion = &completion;
1295
1296	switch (func) {
1297	case PHY_FUNC_HARD_RESET:
1298		hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
1299		break;
1300
1301	case PHY_FUNC_LINK_RESET:
1302		hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1303		msleep(HISI_SAS_DELAY_FOR_PHY_DISABLE);
1304		hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1305		break;
1306
1307	case PHY_FUNC_DISABLE:
1308		hisi_sas_phy_enable(hisi_hba, phy_no, 0);
1309		goto out;
1310
1311	case PHY_FUNC_SET_LINK_RATE:
1312		ret = hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1313		break;
1314
1315	case PHY_FUNC_GET_EVENTS:
1316		if (hisi_hba->hw->get_events) {
1317			hisi_hba->hw->get_events(hisi_hba, phy_no);
1318			goto out;
1319		}
1320		fallthrough;
1321	case PHY_FUNC_RELEASE_SPINUP_HOLD:
1322	default:
1323		ret = -EOPNOTSUPP;
1324		goto out;
1325	}
1326
1327	if (sts && !wait_for_completion_timeout(&completion,
1328		HISI_SAS_WAIT_PHYUP_TIMEOUT)) {
1329		dev_warn(dev, "phy%d wait phyup timed out for func %d\n",
1330			 phy_no, func);
1331		if (phy->in_reset)
1332			ret = -ETIMEDOUT;
1333	}
1334
1335out:
1336	phy->reset_completion = NULL;
1337
1338	up(&hisi_hba->sem);
1339	return ret;
1340}
1341
1342static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
1343		bool reset, int pmp, u8 *fis)
1344{
1345	struct ata_taskfile tf;
1346
1347	ata_tf_init(dev, &tf);
1348	if (reset)
1349		tf.ctl |= ATA_SRST;
1350	else
1351		tf.ctl &= ~ATA_SRST;
1352	tf.command = ATA_CMD_DEV_RESET;
1353	ata_tf_to_fis(&tf, pmp, 0, fis);
1354}
1355
1356static int hisi_sas_softreset_ata_disk(struct domain_device *device)
1357{
1358	u8 fis[FIS_BUF_SIZE] = {0};
1359	struct ata_port *ap = device->sata_dev.ap;
1360	struct ata_link *link;
1361	int rc = TMF_RESP_FUNC_FAILED;
1362	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1363	struct device *dev = hisi_hba->dev;
1364
1365	ata_for_each_link(link, ap, EDGE) {
1366		int pmp = sata_srst_pmp(link);
1367
1368		hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1369		rc = sas_execute_ata_cmd(device, fis, -1);
1370		if (rc != TMF_RESP_FUNC_COMPLETE)
1371			break;
1372	}
1373
1374	if (rc == TMF_RESP_FUNC_COMPLETE) {
1375		usleep_range(DELAY_FOR_SOFTRESET_MIN, DELAY_FOR_SOFTRESET_MAX);
1376		ata_for_each_link(link, ap, EDGE) {
1377			int pmp = sata_srst_pmp(link);
1378
1379			hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
1380			rc = sas_execute_ata_cmd(device, fis, -1);
1381			if (rc != TMF_RESP_FUNC_COMPLETE)
1382				dev_err(dev, "ata disk %016llx de-reset failed\n",
1383					SAS_ADDR(device->sas_addr));
1384		}
1385	} else {
1386		dev_err(dev, "ata disk %016llx reset failed\n",
1387			SAS_ADDR(device->sas_addr));
1388	}
1389
1390	if (rc == TMF_RESP_FUNC_COMPLETE)
1391		hisi_sas_release_task(hisi_hba, device);
1392
1393	return rc;
1394}
1395
1396static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1397{
1398	u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1399	int i;
1400
1401	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1402		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1403		struct domain_device *device = sas_dev->sas_device;
1404		struct asd_sas_port *sas_port;
1405		struct hisi_sas_port *port;
1406		struct hisi_sas_phy *phy = NULL;
1407		struct asd_sas_phy *sas_phy;
1408
1409		if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1410				|| !device || !device->port)
1411			continue;
1412
1413		sas_port = device->port;
1414		port = to_hisi_sas_port(sas_port);
1415
1416		spin_lock(&sas_port->phy_list_lock);
1417		list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1418			if (state & BIT(sas_phy->id)) {
1419				phy = sas_phy->lldd_phy;
1420				break;
1421			}
1422		spin_unlock(&sas_port->phy_list_lock);
1423
1424		if (phy) {
1425			port->id = phy->port_id;
1426
1427			/* Update linkrate of directly attached device. */
1428			if (!device->parent)
1429				device->linkrate = phy->sas_phy.linkrate;
1430
1431			hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1432		} else if (!port->port_attached)
1433			port->id = 0xff;
1434	}
1435}
1436
1437static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 state)
1438{
1439	u32 new_state = hisi_hba->hw->get_phys_state(hisi_hba);
1440	struct asd_sas_port *_sas_port = NULL;
1441	int phy_no;
1442
1443	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1444		struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1445		struct asd_sas_phy *sas_phy = &phy->sas_phy;
1446		struct asd_sas_port *sas_port = sas_phy->port;
1447		bool do_port_check = _sas_port != sas_port;
1448
1449		if (!sas_phy->phy->enabled)
1450			continue;
1451
1452		/* Report PHY state change to libsas */
1453		if (new_state & BIT(phy_no)) {
1454			if (do_port_check && sas_port && sas_port->port_dev) {
1455				struct domain_device *dev = sas_port->port_dev;
1456
1457				_sas_port = sas_port;
1458
1459				if (dev_is_expander(dev->dev_type))
1460					sas_notify_port_event(sas_phy,
1461							PORTE_BROADCAST_RCVD,
1462							GFP_KERNEL);
1463			}
1464		} else {
1465			hisi_sas_phy_down(hisi_hba, phy_no, 0, GFP_KERNEL);
1466
1467			/*
1468			 * The new_state is not ready but old_state is ready,
1469			 * the two possible causes:
1470			 * 1. The connected device is removed
1471			 * 2. Device exists but phyup timed out
1472			 */
1473			if (state & BIT(phy_no))
1474				hisi_sas_notify_phy_event(phy,
1475							  HISI_PHYE_LINK_RESET);
1476		}
1477	}
1478}
1479
1480static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
1481{
1482	struct hisi_sas_device *sas_dev;
1483	struct domain_device *device;
1484	int i;
1485
1486	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1487		sas_dev = &hisi_hba->devices[i];
1488		device = sas_dev->sas_device;
1489
1490		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1491			continue;
1492
1493		hisi_sas_init_device(device);
1494	}
1495}
1496
1497static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
1498					     struct asd_sas_port *sas_port,
1499					     struct domain_device *device)
1500{
1501	struct ata_port *ap = device->sata_dev.ap;
1502	struct device *dev = hisi_hba->dev;
1503	int rc = TMF_RESP_FUNC_FAILED;
1504	struct ata_link *link;
1505	u8 fis[FIS_BUF_SIZE] = {0};
1506	int i;
1507
1508	for (i = 0; i < hisi_hba->n_phy; i++) {
1509		if (!(sas_port->phy_mask & BIT(i)))
1510			continue;
1511
1512		ata_for_each_link(link, ap, EDGE) {
1513			int pmp = sata_srst_pmp(link);
1514
1515			hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
1516			rc = sas_execute_ata_cmd(device, fis, i);
1517			if (rc != TMF_RESP_FUNC_COMPLETE) {
1518				dev_err(dev, "phy%d ata reset failed rc=%d\n",
1519					i, rc);
1520				break;
1521			}
1522		}
1523	}
1524}
1525
1526static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
1527{
1528	struct device *dev = hisi_hba->dev;
1529	int port_no, rc, i;
1530
1531	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1532		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1533		struct domain_device *device = sas_dev->sas_device;
1534
1535		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
1536			continue;
1537
1538		rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1539		if (rc < 0)
1540			dev_err(dev, "STP reject: abort dev failed %d\n", rc);
1541	}
1542
1543	for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
1544		struct hisi_sas_port *port = &hisi_hba->port[port_no];
1545		struct asd_sas_port *sas_port = &port->sas_port;
1546		struct domain_device *port_dev = sas_port->port_dev;
1547		struct domain_device *device;
1548
1549		if (!port_dev || !dev_is_expander(port_dev->dev_type))
1550			continue;
1551
1552		/* Try to find a SATA device */
1553		list_for_each_entry(device, &sas_port->dev_list,
1554				    dev_list_node) {
1555			if (dev_is_sata(device)) {
1556				hisi_sas_send_ata_reset_each_phy(hisi_hba,
1557								 sas_port,
1558								 device);
1559				break;
1560			}
1561		}
1562	}
1563}
1564
1565void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1566{
1567	struct Scsi_Host *shost = hisi_hba->shost;
1568
1569	hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1570
1571	scsi_block_requests(shost);
1572	hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba,
1573						 WAIT_CMD_COMPLETE_DELAY,
1574						 WAIT_CMD_COMPLETE_TMROUT);
1575
1576	/*
1577	 * hisi_hba->timer is only used for v1/v2 hw, and check hw->sht
1578	 * which is also only used for v1/v2 hw to skip it for v3 hw
1579	 */
1580	if (hisi_hba->hw->sht)
1581		timer_delete_sync(&hisi_hba->timer);
1582
1583	set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1584}
1585EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
1586
1587static void hisi_sas_async_init_wait_phyup(void *data, async_cookie_t cookie)
1588{
1589	struct hisi_sas_phy *phy = data;
1590	struct hisi_hba *hisi_hba = phy->hisi_hba;
1591	struct device *dev = hisi_hba->dev;
1592	DECLARE_COMPLETION_ONSTACK(completion);
1593	int phy_no = phy->sas_phy.id;
1594
1595	phy->reset_completion = &completion;
1596	hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1597	if (!wait_for_completion_timeout(&completion,
1598					 HISI_SAS_WAIT_PHYUP_TIMEOUT))
1599		dev_warn(dev, "phy%d wait phyup timed out\n", phy_no);
1600
1601	phy->reset_completion = NULL;
1602}
1603
1604void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
1605{
1606	struct Scsi_Host *shost = hisi_hba->shost;
1607	ASYNC_DOMAIN_EXCLUSIVE(async);
1608	int phy_no;
1609
1610	/* Init and wait for PHYs to come up and all libsas event finished. */
1611	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1612		struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1613		struct asd_sas_phy *sas_phy = &phy->sas_phy;
1614
1615		if (!sas_phy->phy->enabled)
1616			continue;
1617
1618		if (!(hisi_hba->phy_state & BIT(phy_no))) {
1619			hisi_sas_phy_enable(hisi_hba, phy_no, 1);
1620			continue;
1621		}
1622
1623		async_schedule_domain(hisi_sas_async_init_wait_phyup,
1624				      phy, &async);
1625	}
1626
1627	async_synchronize_full_domain(&async);
1628	hisi_sas_refresh_port_id(hisi_hba);
1629	clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1630
1631	if (hisi_hba->reject_stp_links_msk)
1632		hisi_sas_terminate_stp_reject(hisi_hba);
1633	hisi_sas_reset_init_all_devices(hisi_hba);
1634	scsi_unblock_requests(shost);
1635	clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1636	up(&hisi_hba->sem);
1637
1638	hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state);
1639}
1640EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
1641
1642static int hisi_sas_controller_prereset(struct hisi_hba *hisi_hba)
1643{
1644	if (!hisi_hba->hw->soft_reset)
1645		return -ENOENT;
1646
1647	down(&hisi_hba->sem);
1648	if (test_and_set_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags)) {
1649		up(&hisi_hba->sem);
1650		return -EPERM;
1651	}
1652
1653	if (hisi_sas_debugfs_enable)
1654		hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
1655
1656	return 0;
1657}
1658
1659static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1660{
1661	struct device *dev = hisi_hba->dev;
1662	struct Scsi_Host *shost = hisi_hba->shost;
1663	int rc;
1664
1665	dev_info(dev, "controller resetting...\n");
1666	hisi_sas_controller_reset_prepare(hisi_hba);
1667
1668	rc = hisi_hba->hw->soft_reset(hisi_hba);
1669	if (rc) {
1670		dev_warn(dev, "controller reset failed (%d)\n", rc);
1671		clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1672		up(&hisi_hba->sem);
1673		scsi_unblock_requests(shost);
1674		clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags);
1675		return rc;
1676	}
1677	clear_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
1678
1679	hisi_sas_controller_reset_done(hisi_hba);
1680	dev_info(dev, "controller reset complete\n");
1681
1682	return 0;
1683}
1684
1685static int hisi_sas_abort_task(struct sas_task *task)
1686{
1687	struct hisi_sas_internal_abort_data internal_abort_data = { false };
1688	struct domain_device *device = task->dev;
1689	struct hisi_sas_device *sas_dev = device->lldd_dev;
1690	struct hisi_sas_slot *slot = task->lldd_task;
1691	struct hisi_hba *hisi_hba;
1692	struct device *dev;
1693	int rc = TMF_RESP_FUNC_FAILED;
1694	unsigned long flags;
1695
1696	if (!sas_dev)
1697		return TMF_RESP_FUNC_FAILED;
1698
1699	hisi_hba = dev_to_hisi_hba(task->dev);
1700	dev = hisi_hba->dev;
1701
1702	spin_lock_irqsave(&task->task_state_lock, flags);
1703	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1704		struct hisi_sas_cq *cq;
1705
1706		if (slot) {
1707			/*
1708			 * sync irq or poll queue to avoid free'ing task
1709			 * before using task in IO completion
1710			 */
1711			cq = &hisi_hba->cq[slot->dlvry_queue];
1712			hisi_sas_sync_cq(cq);
1713		}
1714		spin_unlock_irqrestore(&task->task_state_lock, flags);
1715		rc = TMF_RESP_FUNC_COMPLETE;
1716		goto out;
1717	}
1718	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1719	spin_unlock_irqrestore(&task->task_state_lock, flags);
1720
1721	if (!slot)
1722		goto out;
1723
1724	if (task->task_proto & SAS_PROTOCOL_SSP) {
1725		u16 tag = slot->idx;
1726		int rc2;
1727
1728		rc = sas_abort_task(task, tag);
1729		rc2 = sas_execute_internal_abort_single(device, tag,
1730				slot->dlvry_queue, &internal_abort_data);
1731		if (rc2 < 0) {
1732			dev_err(dev, "abort task: internal abort (%d)\n", rc2);
1733			return TMF_RESP_FUNC_FAILED;
1734		}
1735
1736		/*
1737		 * If the TMF finds that the IO is not in the device and also
1738		 * the internal abort does not succeed, then it is safe to
1739		 * free the slot.
1740		 * Note: if the internal abort succeeds then the slot
1741		 * will have already been completed
1742		 */
1743		if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1744			if (task->lldd_task)
1745				hisi_sas_do_release_task(hisi_hba, task, slot, true);
1746		}
1747	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
1748		task->task_proto & SAS_PROTOCOL_STP) {
1749		if (task->dev->dev_type == SAS_SATA_DEV) {
1750			struct ata_queued_cmd *qc = task->uldd_task;
1751
1752			rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1753			if (rc < 0) {
1754				dev_err(dev, "abort task: internal abort failed\n");
1755				goto out;
1756			}
1757			hisi_sas_dereg_device(hisi_hba, device);
1758
1759			/*
1760			 * If an ATA internal command times out in ATA EH, it
1761			 * need to execute soft reset, so check the scsicmd
1762			 */
1763			if ((sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR) &&
1764			    qc && qc->scsicmd) {
1765				hisi_sas_do_release_task(hisi_hba, task, slot, true);
1766				rc = TMF_RESP_FUNC_COMPLETE;
1767			} else {
1768				rc = hisi_sas_softreset_ata_disk(device);
1769			}
1770		}
1771	} else if (task->task_proto & SAS_PROTOCOL_SMP) {
1772		/* SMP */
1773		u32 tag = slot->idx;
1774		struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
1775
1776		rc = sas_execute_internal_abort_single(device,
1777						       tag, slot->dlvry_queue,
1778						       &internal_abort_data);
1779		if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1780					task->lldd_task) {
1781			/*
1782			 * sync irq or poll queue to avoid free'ing task
1783			 * before using task in IO completion
1784			 */
1785			hisi_sas_sync_cq(cq);
1786			slot->task = NULL;
1787		}
1788	}
1789
1790out:
1791	if (rc != TMF_RESP_FUNC_COMPLETE)
1792		dev_notice(dev, "abort task: rc=%d\n", rc);
1793	return rc;
1794}
1795
1796static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1797{
1798	struct hisi_sas_device *sas_dev = device->lldd_dev;
1799	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1800	struct device *dev = hisi_hba->dev;
1801	int rc;
1802
1803	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1804	if (rc < 0) {
1805		dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
1806		return TMF_RESP_FUNC_FAILED;
1807	}
1808	hisi_sas_dereg_device(hisi_hba, device);
1809
1810	rc = sas_abort_task_set(device, lun);
1811	if (rc == TMF_RESP_FUNC_COMPLETE)
1812		hisi_sas_release_task(hisi_hba, device);
1813
1814	return rc;
1815}
1816
1817static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1818{
1819	struct sas_phy *local_phy = sas_get_local_phy(device);
1820	struct hisi_sas_device *sas_dev = device->lldd_dev;
1821	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1822	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1823	int rc, reset_type;
1824
1825	if (!local_phy->enabled) {
1826		sas_put_local_phy(local_phy);
1827		return -ENODEV;
1828	}
1829
1830	if (scsi_is_sas_phy_local(local_phy)) {
1831		struct asd_sas_phy *sas_phy =
1832			sas_ha->sas_phy[local_phy->number];
1833		struct hisi_sas_phy *phy =
1834			container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1835		unsigned long flags;
1836
1837		spin_lock_irqsave(&phy->lock, flags);
1838		phy->in_reset = 1;
1839		spin_unlock_irqrestore(&phy->lock, flags);
1840	}
1841
1842	reset_type = (sas_dev->dev_status == HISI_SAS_DEV_INIT ||
1843		      !dev_is_sata(device)) ? true : false;
1844
1845	rc = sas_phy_reset(local_phy, reset_type);
1846	sas_put_local_phy(local_phy);
1847
1848	if (scsi_is_sas_phy_local(local_phy)) {
1849		struct asd_sas_phy *sas_phy =
1850			sas_ha->sas_phy[local_phy->number];
1851		struct hisi_sas_phy *phy =
1852			container_of(sas_phy, struct hisi_sas_phy, sas_phy);
1853		unsigned long flags;
1854
1855		spin_lock_irqsave(&phy->lock, flags);
1856		phy->in_reset = 0;
1857		spin_unlock_irqrestore(&phy->lock, flags);
1858
1859		/* report PHY down if timed out */
1860		if (rc == -ETIMEDOUT)
1861			hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL);
1862		return rc;
1863	}
1864
1865	/* Remote phy */
1866	if (rc)
1867		return rc;
1868
1869	if (dev_is_sata(device)) {
1870		struct ata_link *link = &device->sata_dev.ap->link;
1871
1872		rc = ata_wait_after_reset(link, jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT,
1873					  smp_ata_check_ready_type);
1874	} else {
1875		msleep(DELAY_FOR_LINK_READY);
1876	}
1877
1878	return rc;
1879}
1880
1881static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1882{
1883	struct hisi_sas_device *sas_dev = device->lldd_dev;
1884	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1885	struct device *dev = hisi_hba->dev;
1886	int rc;
1887
1888	if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
1889		sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1890
1891	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1892	if (rc < 0) {
1893		dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
1894		return TMF_RESP_FUNC_FAILED;
1895	}
1896	hisi_sas_dereg_device(hisi_hba, device);
1897
1898	if (dev_is_sata(device)) {
1899		rc = hisi_sas_softreset_ata_disk(device);
1900		if (rc == TMF_RESP_FUNC_FAILED)
1901			dev_err(dev, "ata disk %016llx reset (%d)\n",
1902				SAS_ADDR(device->sas_addr), rc);
1903	}
1904
1905	rc = hisi_sas_debug_I_T_nexus_reset(device);
1906	if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1907		hisi_sas_release_task(hisi_hba, device);
1908
1909	return rc;
1910}
1911
1912static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1913{
1914	struct hisi_sas_device *sas_dev = device->lldd_dev;
1915	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1916	struct device *dev = hisi_hba->dev;
1917	int rc = TMF_RESP_FUNC_FAILED;
1918
1919	/* Clear internal IO and then lu reset */
1920	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
1921	if (rc < 0) {
1922		dev_err(dev, "lu_reset: internal abort failed\n");
1923		goto out;
1924	}
1925	hisi_sas_dereg_device(hisi_hba, device);
1926
1927	if (dev_is_sata(device)) {
1928		struct sas_phy *phy = sas_get_local_phy(device);
1929
1930		rc = sas_phy_reset(phy, true);
1931		if (rc == 0)
1932			hisi_sas_release_task(hisi_hba, device);
1933		sas_put_local_phy(phy);
1934	} else {
1935		rc = sas_lu_reset(device, lun);
1936		if (rc == TMF_RESP_FUNC_COMPLETE)
1937			hisi_sas_release_task(hisi_hba, device);
1938	}
1939out:
1940	if (rc != TMF_RESP_FUNC_COMPLETE)
1941		dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1942			     sas_dev->device_id, rc);
1943	return rc;
1944}
1945
1946static void hisi_sas_async_I_T_nexus_reset(void *data, async_cookie_t cookie)
1947{
1948	struct domain_device *device = data;
1949	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1950	int rc;
1951
1952	rc = hisi_sas_debug_I_T_nexus_reset(device);
1953	if (rc != TMF_RESP_FUNC_COMPLETE)
1954		dev_info(hisi_hba->dev, "I_T_nexus reset fail for dev:%016llx rc=%d\n",
1955			 SAS_ADDR(device->sas_addr), rc);
1956}
1957
1958static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1959{
1960	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1961	HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1962	ASYNC_DOMAIN_EXCLUSIVE(async);
1963	int i;
1964
1965	queue_work(hisi_hba->wq, &r.work);
1966	wait_for_completion(r.completion);
1967	if (!r.done)
1968		return TMF_RESP_FUNC_FAILED;
1969
1970	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1971		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1972		struct domain_device *device = sas_dev->sas_device;
1973
1974		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
1975		    dev_is_expander(device->dev_type))
1976			continue;
1977
1978		async_schedule_domain(hisi_sas_async_I_T_nexus_reset,
1979				      device, &async);
1980	}
1981
1982	async_synchronize_full_domain(&async);
1983	hisi_sas_release_tasks(hisi_hba);
1984
1985	return TMF_RESP_FUNC_COMPLETE;
1986}
1987
1988static int hisi_sas_query_task(struct sas_task *task)
1989{
1990	int rc = TMF_RESP_FUNC_FAILED;
1991
1992	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1993		struct hisi_sas_slot *slot = task->lldd_task;
1994		u32 tag = slot->idx;
1995
1996		rc = sas_query_task(task, tag);
1997		switch (rc) {
1998		/* The task is still in Lun, release it then */
1999		case TMF_RESP_FUNC_SUCC:
2000		/* The task is not in Lun or failed, reset the phy */
2001		case TMF_RESP_FUNC_FAILED:
2002		case TMF_RESP_FUNC_COMPLETE:
2003			break;
2004		default:
2005			rc = TMF_RESP_FUNC_FAILED;
2006			break;
2007		}
2008	}
2009	return rc;
2010}
2011
2012static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
2013					    void *data)
2014{
2015	struct domain_device *device = task->dev;
2016	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
2017	struct hisi_sas_internal_abort_data *timeout = data;
2018
2019	if (hisi_sas_debugfs_enable) {
2020		/*
2021		 * If timeout occurs in device gone scenario, to avoid
2022		 * circular dependency like:
2023		 * hisi_sas_dev_gone() -> down() -> ... ->
2024		 * hisi_sas_internal_abort_timeout() -> down().
2025		 */
2026		if (!timeout->rst_ha_timeout)
2027			down(&hisi_hba->sem);
2028		hisi_hba->hw->debugfs_snapshot_regs(hisi_hba);
2029		if (!timeout->rst_ha_timeout)
2030			up(&hisi_hba->sem);
2031	}
2032
2033	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
2034		pr_err("Internal abort: timeout %016llx\n",
2035		       SAS_ADDR(device->sas_addr));
2036	} else {
2037		struct hisi_sas_slot *slot = task->lldd_task;
2038
2039		set_bit(HISI_SAS_HW_FAULT_BIT, &hisi_hba->flags);
2040
2041		if (slot) {
2042			struct hisi_sas_cq *cq =
2043				&hisi_hba->cq[slot->dlvry_queue];
2044			/*
2045			 * sync irq or poll queue to avoid free'ing task
2046			 * before using task in IO completion
2047			 */
2048			hisi_sas_sync_cq(cq);
2049			slot->task = NULL;
2050		}
2051
2052		if (timeout->rst_ha_timeout) {
2053			pr_err("Internal abort: timeout and not done %016llx. Queuing reset.\n",
2054			       SAS_ADDR(device->sas_addr));
2055			queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2056		} else {
2057			pr_err("Internal abort: timeout and not done %016llx.\n",
2058			       SAS_ADDR(device->sas_addr));
2059		}
2060
2061		return true;
2062	}
2063
2064	return false;
2065}
2066
2067static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
2068{
2069	hisi_sas_port_notify_formed(sas_phy);
2070}
2071
2072static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
2073			u8 reg_index, u8 reg_count, u8 *write_data)
2074{
2075	struct hisi_hba *hisi_hba = sha->lldd_ha;
2076
2077	if (!hisi_hba->hw->write_gpio)
2078		return -EOPNOTSUPP;
2079
2080	return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
2081				reg_index, reg_count, write_data);
2082}
2083
2084static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
2085{
2086	struct asd_sas_phy *sas_phy = &phy->sas_phy;
2087	struct sas_phy *sphy = sas_phy->phy;
2088	unsigned long flags;
2089
2090	phy->phy_attached = 0;
2091	phy->phy_type = 0;
2092	phy->port = NULL;
2093
2094	spin_lock_irqsave(&phy->lock, flags);
2095	if (phy->enable)
2096		sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
2097	else
2098		sphy->negotiated_linkrate = SAS_PHY_DISABLED;
2099	spin_unlock_irqrestore(&phy->lock, flags);
2100}
2101
2102void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy,
2103		       gfp_t gfp_flags)
2104{
2105	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
2106	struct asd_sas_phy *sas_phy = &phy->sas_phy;
2107	struct device *dev = hisi_hba->dev;
2108
2109	if (rdy) {
2110		/* Phy down but ready */
2111		hisi_sas_bytes_dmaed(hisi_hba, phy_no, gfp_flags);
2112		hisi_sas_port_notify_formed(sas_phy);
2113	} else {
2114		struct hisi_sas_port *port = phy->port;
2115
2116		if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags) ||
2117		    phy->in_reset) {
2118			dev_info(dev, "ignore flutter phy%d down\n", phy_no);
2119			return;
2120		}
2121		/* Phy down and not ready */
2122		sas_notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL, gfp_flags);
2123		sas_phy_disconnected(sas_phy);
2124
2125		if (port) {
2126			if (phy->phy_type & PORT_TYPE_SAS) {
2127				int port_id = port->id;
2128
2129				if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
2130								       port_id))
2131					port->port_attached = 0;
2132			} else if (phy->phy_type & PORT_TYPE_SATA)
2133				port->port_attached = 0;
2134		}
2135		hisi_sas_phy_disconnected(phy);
2136	}
2137}
2138EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
2139
2140void hisi_sas_phy_bcast(struct hisi_sas_phy *phy)
2141{
2142	struct asd_sas_phy *sas_phy = &phy->sas_phy;
2143	struct hisi_hba	*hisi_hba = phy->hisi_hba;
2144
2145	if (test_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags))
2146		return;
2147
2148	sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD, GFP_ATOMIC);
2149}
2150EXPORT_SYMBOL_GPL(hisi_sas_phy_bcast);
2151
2152int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type)
2153{
2154	struct hisi_hba *hisi_hba = shost_priv(shost);
2155
2156	if (reset_type != SCSI_ADAPTER_RESET)
2157		return -EOPNOTSUPP;
2158
2159	queue_work(hisi_hba->wq, &hisi_hba->rst_work);
2160
2161	return 0;
2162}
2163EXPORT_SYMBOL_GPL(hisi_sas_host_reset);
2164
2165struct scsi_transport_template *hisi_sas_stt;
2166EXPORT_SYMBOL_GPL(hisi_sas_stt);
2167
2168static struct sas_domain_function_template hisi_sas_transport_ops = {
2169	.lldd_dev_found		= hisi_sas_dev_found,
2170	.lldd_dev_gone		= hisi_sas_dev_gone,
2171	.lldd_execute_task	= hisi_sas_queue_command,
2172	.lldd_control_phy	= hisi_sas_control_phy,
2173	.lldd_abort_task	= hisi_sas_abort_task,
2174	.lldd_abort_task_set	= hisi_sas_abort_task_set,
2175	.lldd_I_T_nexus_reset	= hisi_sas_I_T_nexus_reset,
2176	.lldd_lu_reset		= hisi_sas_lu_reset,
2177	.lldd_query_task	= hisi_sas_query_task,
2178	.lldd_clear_nexus_ha	= hisi_sas_clear_nexus_ha,
2179	.lldd_port_formed	= hisi_sas_port_formed,
2180	.lldd_write_gpio	= hisi_sas_write_gpio,
2181	.lldd_tmf_aborted	= hisi_sas_tmf_aborted,
2182	.lldd_abort_timeout	= hisi_sas_internal_abort_timeout,
2183};
2184
2185void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
2186{
2187	int i, s, j, max_command_entries = HISI_SAS_MAX_COMMANDS;
2188	struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2189
2190	for (i = 0; i < hisi_hba->queue_count; i++) {
2191		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2192		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2193		struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];
2194
2195		s = sizeof(struct hisi_sas_cmd_hdr);
2196		for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
2197			memset(&cmd_hdr[j], 0, s);
2198
2199		dq->wr_point = 0;
2200
2201		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2202		memset(hisi_hba->complete_hdr[i], 0, s);
2203		cq->rd_point = 0;
2204	}
2205
2206	s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
2207	memset(hisi_hba->initial_fis, 0, s);
2208
2209	s = max_command_entries * sizeof(struct hisi_sas_iost);
2210	memset(hisi_hba->iost, 0, s);
2211
2212	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2213	memset(hisi_hba->breakpoint, 0, s);
2214
2215	s = sizeof(struct hisi_sas_sata_breakpoint);
2216	for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
2217		memset(&sata_breakpoint[j], 0, s);
2218}
2219EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
2220
2221int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2222{
2223	struct device *dev = hisi_hba->dev;
2224	int i, j, s, max_command_entries = HISI_SAS_MAX_COMMANDS;
2225	int max_command_entries_ru, sz_slot_buf_ru;
2226	int blk_cnt, slots_per_blk;
2227
2228	sema_init(&hisi_hba->sem, 1);
2229	spin_lock_init(&hisi_hba->lock);
2230	for (i = 0; i < hisi_hba->n_phy; i++) {
2231		hisi_sas_phy_init(hisi_hba, i);
2232		hisi_hba->port[i].port_attached = 0;
2233		hisi_hba->port[i].id = -1;
2234	}
2235
2236	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
2237		hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
2238		hisi_hba->devices[i].device_id = i;
2239		hisi_hba->devices[i].dev_status = HISI_SAS_DEV_INIT;
2240	}
2241
2242	for (i = 0; i < hisi_hba->queue_count; i++) {
2243		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2244		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2245
2246		/* Completion queue structure */
2247		cq->id = i;
2248		cq->hisi_hba = hisi_hba;
2249		spin_lock_init(&cq->poll_lock);
2250
2251		/* Delivery queue structure */
2252		spin_lock_init(&dq->lock);
2253		INIT_LIST_HEAD(&dq->list);
2254		dq->id = i;
2255		dq->hisi_hba = hisi_hba;
2256
2257		/* Delivery queue */
2258		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2259		hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
2260						&hisi_hba->cmd_hdr_dma[i],
2261						GFP_KERNEL);
2262		if (!hisi_hba->cmd_hdr[i])
2263			goto err_out;
2264
2265		/* Completion queue */
2266		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2267		hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
2268						&hisi_hba->complete_hdr_dma[i],
2269						GFP_KERNEL);
2270		if (!hisi_hba->complete_hdr[i])
2271			goto err_out;
2272	}
2273
2274	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2275	hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
2276					     GFP_KERNEL);
2277	if (!hisi_hba->itct)
2278		goto err_out;
2279
2280	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2281					   sizeof(struct hisi_sas_slot),
2282					   GFP_KERNEL);
2283	if (!hisi_hba->slot_info)
2284		goto err_out;
2285
2286	/* roundup to avoid overly large block size */
2287	max_command_entries_ru = roundup(max_command_entries,
2288					 BLK_CNT_OPTIMIZE_MARK);
2289	if (hisi_hba->prot_mask & HISI_SAS_DIX_PROT_MASK)
2290		sz_slot_buf_ru = sizeof(struct hisi_sas_slot_dif_buf_table);
2291	else
2292		sz_slot_buf_ru = sizeof(struct hisi_sas_slot_buf_table);
2293
2294	sz_slot_buf_ru = roundup(sz_slot_buf_ru, BLK_CNT_OPTIMIZE_MARK);
2295	s = max(lcm(max_command_entries_ru, sz_slot_buf_ru), PAGE_SIZE);
2296	blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
2297	slots_per_blk = s / sz_slot_buf_ru;
2298
2299	for (i = 0; i < blk_cnt; i++) {
2300		int slot_index = i * slots_per_blk;
2301		dma_addr_t buf_dma;
2302		void *buf;
2303
2304		buf = dmam_alloc_coherent(dev, s, &buf_dma,
2305					  GFP_KERNEL);
2306		if (!buf)
2307			goto err_out;
2308
2309		for (j = 0; j < slots_per_blk; j++, slot_index++) {
2310			struct hisi_sas_slot *slot;
2311
2312			slot = &hisi_hba->slot_info[slot_index];
2313			slot->buf = buf;
2314			slot->buf_dma = buf_dma;
2315			slot->idx = slot_index;
2316
2317			buf += sz_slot_buf_ru;
2318			buf_dma += sz_slot_buf_ru;
2319		}
2320	}
2321
2322	s = max_command_entries * sizeof(struct hisi_sas_iost);
2323	hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
2324					     GFP_KERNEL);
2325	if (!hisi_hba->iost)
2326		goto err_out;
2327
2328	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2329	hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
2330						   &hisi_hba->breakpoint_dma,
2331						   GFP_KERNEL);
2332	if (!hisi_hba->breakpoint)
2333		goto err_out;
2334
2335	s = hisi_hba->slot_index_count = max_command_entries;
2336	hisi_hba->slot_index_tags = devm_bitmap_zalloc(dev, s, GFP_KERNEL);
2337	if (!hisi_hba->slot_index_tags)
2338		goto err_out;
2339
2340	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2341	hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
2342						    &hisi_hba->initial_fis_dma,
2343						    GFP_KERNEL);
2344	if (!hisi_hba->initial_fis)
2345		goto err_out;
2346
2347	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2348	hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
2349					&hisi_hba->sata_breakpoint_dma,
2350					GFP_KERNEL);
2351	if (!hisi_hba->sata_breakpoint)
2352		goto err_out;
2353
2354	hisi_hba->last_slot_index = 0;
2355
2356	hisi_hba->wq =
2357		alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, dev_name(dev));
2358	if (!hisi_hba->wq) {
2359		dev_err(dev, "sas_alloc: failed to create workqueue\n");
2360		goto err_out;
2361	}
2362
2363	return 0;
2364err_out:
2365	return -ENOMEM;
2366}
2367EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2368
2369void hisi_sas_free(struct hisi_hba *hisi_hba)
2370{
2371	int i;
2372
2373	for (i = 0; i < hisi_hba->n_phy; i++) {
2374		struct hisi_sas_phy *phy = &hisi_hba->phy[i];
2375
2376		timer_delete_sync(&phy->timer);
2377	}
2378
2379	if (hisi_hba->wq)
2380		destroy_workqueue(hisi_hba->wq);
2381}
2382EXPORT_SYMBOL_GPL(hisi_sas_free);
2383
2384void hisi_sas_rst_work_handler(struct work_struct *work)
2385{
2386	struct hisi_hba *hisi_hba =
2387		container_of(work, struct hisi_hba, rst_work);
2388
2389	if (hisi_sas_controller_prereset(hisi_hba))
2390		return;
2391
2392	hisi_sas_controller_reset(hisi_hba);
2393}
2394EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2395
2396void hisi_sas_sync_rst_work_handler(struct work_struct *work)
2397{
2398	struct hisi_sas_rst *rst =
2399		container_of(work, struct hisi_sas_rst, work);
2400
2401	if (hisi_sas_controller_prereset(rst->hisi_hba))
2402		goto rst_complete;
2403
2404	if (!hisi_sas_controller_reset(rst->hisi_hba))
2405		rst->done = true;
2406rst_complete:
2407	complete(rst->completion);
2408}
2409EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
2410
2411int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
2412{
2413	struct device *dev = hisi_hba->dev;
2414	struct platform_device *pdev = hisi_hba->platform_dev;
2415	struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2416	struct clk *refclk;
2417
2418	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2419					  SAS_ADDR_SIZE)) {
2420		dev_err(dev, "could not get property sas-addr\n");
2421		return -ENOENT;
2422	}
2423
2424	if (np) {
2425		/*
2426		 * These properties are only required for platform device-based
2427		 * controller with DT firmware.
2428		 */
2429		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
2430					"hisilicon,sas-syscon");
2431		if (IS_ERR(hisi_hba->ctrl)) {
2432			dev_err(dev, "could not get syscon\n");
2433			return -ENOENT;
2434		}
2435
2436		if (device_property_read_u32(dev, "ctrl-reset-reg",
2437					     &hisi_hba->ctrl_reset_reg)) {
2438			dev_err(dev, "could not get property ctrl-reset-reg\n");
2439			return -ENOENT;
2440		}
2441
2442		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2443					     &hisi_hba->ctrl_reset_sts_reg)) {
2444			dev_err(dev, "could not get property ctrl-reset-sts-reg\n");
2445			return -ENOENT;
2446		}
2447
2448		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2449					     &hisi_hba->ctrl_clock_ena_reg)) {
2450			dev_err(dev, "could not get property ctrl-clock-ena-reg\n");
2451			return -ENOENT;
2452		}
2453	}
2454
2455	refclk = devm_clk_get(dev, NULL);
2456	if (IS_ERR(refclk))
2457		dev_dbg(dev, "no ref clk property\n");
2458	else
2459		hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) /
2460						 HZ_TO_MHZ;
2461
2462	if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
2463		dev_err(dev, "could not get property phy-count\n");
2464		return -ENOENT;
2465	}
2466
2467	if (device_property_read_u32(dev, "queue-count",
2468				     &hisi_hba->queue_count)) {
2469		dev_err(dev, "could not get property queue-count\n");
2470		return -ENOENT;
2471	}
2472
2473	return 0;
2474}
2475EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
2476
2477static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
2478					      const struct hisi_sas_hw *hw)
2479{
2480	struct resource *res;
2481	struct Scsi_Host *shost;
2482	struct hisi_hba *hisi_hba;
2483	struct device *dev = &pdev->dev;
2484	int error;
2485
2486	shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2487	if (!shost) {
2488		dev_err(dev, "scsi host alloc failed\n");
2489		return NULL;
2490	}
2491	hisi_hba = shost_priv(shost);
2492
2493	INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
2494	hisi_hba->hw = hw;
2495	hisi_hba->dev = dev;
2496	hisi_hba->platform_dev = pdev;
2497	hisi_hba->shost = shost;
2498	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
2499
2500	timer_setup(&hisi_hba->timer, NULL, 0);
2501
2502	if (hisi_sas_get_fw_info(hisi_hba) < 0)
2503		goto err_out;
2504
2505	if (hisi_hba->hw->fw_info_check) {
2506		if (hisi_hba->hw->fw_info_check(hisi_hba))
2507			goto err_out;
2508	}
2509
2510	error = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2511	if (error) {
2512		dev_err(dev, "No usable DMA addressing method\n");
2513		goto err_out;
2514	}
2515
2516	hisi_hba->regs = devm_platform_ioremap_resource(pdev, 0);
2517	if (IS_ERR(hisi_hba->regs))
2518		goto err_out;
2519
2520	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2521	if (res) {
2522		hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
2523		if (IS_ERR(hisi_hba->sgpio_regs))
2524			goto err_out;
2525	}
2526
2527	if (hisi_sas_alloc(hisi_hba)) {
2528		hisi_sas_free(hisi_hba);
2529		goto err_out;
2530	}
2531
2532	return shost;
2533err_out:
2534	scsi_host_put(shost);
2535	dev_err(dev, "shost alloc failed\n");
2536	return NULL;
2537}
2538
2539static int hisi_sas_interrupt_preinit(struct hisi_hba *hisi_hba)
2540{
2541	if (hisi_hba->hw->interrupt_preinit)
2542		return hisi_hba->hw->interrupt_preinit(hisi_hba);
2543	return 0;
2544}
2545
2546int hisi_sas_probe(struct platform_device *pdev,
2547		   const struct hisi_sas_hw *hw)
2548{
2549	struct Scsi_Host *shost;
2550	struct hisi_hba *hisi_hba;
2551	struct device *dev = &pdev->dev;
2552	struct asd_sas_phy **arr_phy;
2553	struct asd_sas_port **arr_port;
2554	struct sas_ha_struct *sha;
2555	int rc, phy_nr, port_nr, i;
2556
2557	shost = hisi_sas_shost_alloc(pdev, hw);
2558	if (!shost)
2559		return -ENOMEM;
2560
2561	sha = SHOST_TO_SAS_HA(shost);
2562	hisi_hba = shost_priv(shost);
2563	platform_set_drvdata(pdev, sha);
2564
2565	phy_nr = port_nr = hisi_hba->n_phy;
2566
2567	arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2568	arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2569	if (!arr_phy || !arr_port) {
2570		rc = -ENOMEM;
2571		goto err_out_ha;
2572	}
2573
2574	sha->sas_phy = arr_phy;
2575	sha->sas_port = arr_port;
2576	sha->lldd_ha = hisi_hba;
2577
2578	shost->transportt = hisi_sas_stt;
2579	shost->max_id = HISI_SAS_MAX_DEVICES;
2580	shost->max_lun = ~0;
2581	shost->max_channel = 0;
2582	shost->max_cmd_len = HISI_SAS_MAX_CDB_LEN;
2583	if (hisi_hba->hw->slot_index_alloc) {
2584		shost->can_queue = HISI_SAS_MAX_COMMANDS;
2585		shost->cmd_per_lun = HISI_SAS_MAX_COMMANDS;
2586	} else {
2587		shost->can_queue = HISI_SAS_UNRESERVED_IPTT;
2588		shost->cmd_per_lun = HISI_SAS_UNRESERVED_IPTT;
2589	}
2590
2591	sha->sas_ha_name = DRV_NAME;
2592	sha->dev = hisi_hba->dev;
2593	sha->sas_addr = &hisi_hba->sas_addr[0];
2594	sha->num_phys = hisi_hba->n_phy;
2595	sha->shost = hisi_hba->shost;
2596
2597	for (i = 0; i < hisi_hba->n_phy; i++) {
2598		sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2599		sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2600	}
2601
2602	rc = hisi_sas_interrupt_preinit(hisi_hba);
2603	if (rc)
2604		goto err_out_ha;
2605
2606	rc = scsi_add_host(shost, &pdev->dev);
2607	if (rc)
2608		goto err_out_ha;
2609
2610	rc = sas_register_ha(sha);
2611	if (rc)
2612		goto err_out_register_ha;
2613
2614	rc = hisi_hba->hw->hw_init(hisi_hba);
2615	if (rc)
2616		goto err_out_hw_init;
2617
2618	scsi_scan_host(shost);
2619
2620	return 0;
2621
2622err_out_hw_init:
2623	sas_unregister_ha(sha);
2624err_out_register_ha:
2625	scsi_remove_host(shost);
2626err_out_ha:
2627	hisi_sas_free(hisi_hba);
2628	scsi_host_put(shost);
2629	return rc;
2630}
2631EXPORT_SYMBOL_GPL(hisi_sas_probe);
2632
2633void hisi_sas_remove(struct platform_device *pdev)
2634{
2635	struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2636	struct hisi_hba *hisi_hba = sha->lldd_ha;
2637	struct Scsi_Host *shost = sha->shost;
2638
2639	timer_delete_sync(&hisi_hba->timer);
2640
2641	sas_unregister_ha(sha);
2642	sas_remove_host(shost);
2643
2644	hisi_sas_free(hisi_hba);
2645	scsi_host_put(shost);
2646}
2647EXPORT_SYMBOL_GPL(hisi_sas_remove);
2648
2649#if IS_ENABLED(CONFIG_SCSI_HISI_SAS_DEBUGFS_DEFAULT_ENABLE)
2650#define DEBUGFS_ENABLE_DEFAULT  "enabled"
2651bool hisi_sas_debugfs_enable = true;
2652u32 hisi_sas_debugfs_dump_count = 50;
2653#else
2654#define DEBUGFS_ENABLE_DEFAULT "disabled"
2655bool hisi_sas_debugfs_enable;
2656u32 hisi_sas_debugfs_dump_count = 1;
2657#endif
2658
2659EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
2660module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
2661MODULE_PARM_DESC(hisi_sas_debugfs_enable,
2662		 "Enable driver debugfs (default "DEBUGFS_ENABLE_DEFAULT")");
2663
2664EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);
2665module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);
2666MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");
2667
2668struct dentry *hisi_sas_debugfs_dir;
2669EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dir);
2670
2671static __init int hisi_sas_init(void)
2672{
2673	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2674	if (!hisi_sas_stt)
2675		return -ENOMEM;
2676
2677	if (hisi_sas_debugfs_enable) {
2678		hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
2679		if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {
2680			pr_info("hisi_sas: Limiting debugfs dump count\n");
2681			hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;
2682		}
2683	}
2684
2685	return 0;
2686}
2687
2688static __exit void hisi_sas_exit(void)
2689{
2690	if (hisi_sas_debugfs_enable)
2691		debugfs_remove(hisi_sas_debugfs_dir);
2692
2693	sas_release_transport(hisi_sas_stt);
2694}
2695
2696module_init(hisi_sas_init);
2697module_exit(hisi_sas_exit);
2698
2699MODULE_LICENSE("GPL");
2700MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2701MODULE_DESCRIPTION("HISILICON SAS controller driver");
2702MODULE_ALIAS("platform:" DRV_NAME);