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