1 /*
2  * Copyright (c) 2015 Linaro Ltd.
3  * Copyright (c) 2015 Hisilicon Limited.
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  */
11 
12 #include "hisi_sas.h"
13 #define DRV_NAME "hisi_sas"
14 
15 #define DEV_IS_GONE(dev) \
16 	((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
17 
18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
19 				u8 *lun, struct hisi_sas_tmf_task *tmf);
20 static int
21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
22 			     struct domain_device *device,
23 			     int abort_flag, int tag);
24 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
25 
26 u8 hisi_sas_get_ata_protocol(u8 cmd, int direction)
27 {
28 	switch (cmd) {
29 	case ATA_CMD_FPDMA_WRITE:
30 	case ATA_CMD_FPDMA_READ:
31 	case ATA_CMD_FPDMA_RECV:
32 	case ATA_CMD_FPDMA_SEND:
33 	case ATA_CMD_NCQ_NON_DATA:
34 	return HISI_SAS_SATA_PROTOCOL_FPDMA;
35 
36 	case ATA_CMD_DOWNLOAD_MICRO:
37 	case ATA_CMD_ID_ATA:
38 	case ATA_CMD_PMP_READ:
39 	case ATA_CMD_READ_LOG_EXT:
40 	case ATA_CMD_PIO_READ:
41 	case ATA_CMD_PIO_READ_EXT:
42 	case ATA_CMD_PMP_WRITE:
43 	case ATA_CMD_WRITE_LOG_EXT:
44 	case ATA_CMD_PIO_WRITE:
45 	case ATA_CMD_PIO_WRITE_EXT:
46 	return HISI_SAS_SATA_PROTOCOL_PIO;
47 
48 	case ATA_CMD_DSM:
49 	case ATA_CMD_DOWNLOAD_MICRO_DMA:
50 	case ATA_CMD_PMP_READ_DMA:
51 	case ATA_CMD_PMP_WRITE_DMA:
52 	case ATA_CMD_READ:
53 	case ATA_CMD_READ_EXT:
54 	case ATA_CMD_READ_LOG_DMA_EXT:
55 	case ATA_CMD_READ_STREAM_DMA_EXT:
56 	case ATA_CMD_TRUSTED_RCV_DMA:
57 	case ATA_CMD_TRUSTED_SND_DMA:
58 	case ATA_CMD_WRITE:
59 	case ATA_CMD_WRITE_EXT:
60 	case ATA_CMD_WRITE_FUA_EXT:
61 	case ATA_CMD_WRITE_QUEUED:
62 	case ATA_CMD_WRITE_LOG_DMA_EXT:
63 	case ATA_CMD_WRITE_STREAM_DMA_EXT:
64 	return HISI_SAS_SATA_PROTOCOL_DMA;
65 
66 	case ATA_CMD_CHK_POWER:
67 	case ATA_CMD_DEV_RESET:
68 	case ATA_CMD_EDD:
69 	case ATA_CMD_FLUSH:
70 	case ATA_CMD_FLUSH_EXT:
71 	case ATA_CMD_VERIFY:
72 	case ATA_CMD_VERIFY_EXT:
73 	case ATA_CMD_SET_FEATURES:
74 	case ATA_CMD_STANDBY:
75 	case ATA_CMD_STANDBYNOW1:
76 	return HISI_SAS_SATA_PROTOCOL_NONDATA;
77 	default:
78 		if (direction == DMA_NONE)
79 			return HISI_SAS_SATA_PROTOCOL_NONDATA;
80 		return HISI_SAS_SATA_PROTOCOL_PIO;
81 	}
82 }
83 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
84 
85 void hisi_sas_sata_done(struct sas_task *task,
86 			    struct hisi_sas_slot *slot)
87 {
88 	struct task_status_struct *ts = &task->task_status;
89 	struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
90 	struct hisi_sas_status_buffer *status_buf =
91 			hisi_sas_status_buf_addr_mem(slot);
92 	u8 *iu = &status_buf->iu[0];
93 	struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
94 
95 	resp->frame_len = sizeof(struct dev_to_host_fis);
96 	memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
97 
98 	ts->buf_valid_size = sizeof(*resp);
99 }
100 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
101 
102 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
103 {
104 	struct ata_queued_cmd *qc = task->uldd_task;
105 
106 	if (qc) {
107 		if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
108 			qc->tf.command == ATA_CMD_FPDMA_READ) {
109 			*tag = qc->tag;
110 			return 1;
111 		}
112 	}
113 	return 0;
114 }
115 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
116 
117 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
118 {
119 	return device->port->ha->lldd_ha;
120 }
121 
122 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
123 {
124 	return container_of(sas_port, struct hisi_sas_port, sas_port);
125 }
126 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
127 
128 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
129 {
130 	void *bitmap = hisi_hba->slot_index_tags;
131 
132 	clear_bit(slot_idx, bitmap);
133 }
134 
135 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
136 {
137 	hisi_sas_slot_index_clear(hisi_hba, slot_idx);
138 }
139 
140 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
141 {
142 	void *bitmap = hisi_hba->slot_index_tags;
143 
144 	set_bit(slot_idx, bitmap);
145 }
146 
147 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
148 {
149 	unsigned int index;
150 	void *bitmap = hisi_hba->slot_index_tags;
151 
152 	index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
153 	if (index >= hisi_hba->slot_index_count)
154 		return -SAS_QUEUE_FULL;
155 	hisi_sas_slot_index_set(hisi_hba, index);
156 	*slot_idx = index;
157 	return 0;
158 }
159 
160 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
161 {
162 	int i;
163 
164 	for (i = 0; i < hisi_hba->slot_index_count; ++i)
165 		hisi_sas_slot_index_clear(hisi_hba, i);
166 }
167 
168 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
169 			     struct hisi_sas_slot *slot)
170 {
171 
172 	if (task) {
173 		struct device *dev = hisi_hba->dev;
174 		struct domain_device *device = task->dev;
175 		struct hisi_sas_device *sas_dev = device->lldd_dev;
176 
177 		if (!sas_protocol_ata(task->task_proto))
178 			if (slot->n_elem)
179 				dma_unmap_sg(dev, task->scatter, slot->n_elem,
180 					     task->data_dir);
181 
182 		task->lldd_task = NULL;
183 
184 		if (sas_dev)
185 			atomic64_dec(&sas_dev->running_req);
186 	}
187 
188 	if (slot->buf)
189 		dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
190 
191 
192 	list_del_init(&slot->entry);
193 	slot->task = NULL;
194 	slot->port = NULL;
195 	hisi_sas_slot_index_free(hisi_hba, slot->idx);
196 
197 	/* slot memory is fully zeroed when it is reused */
198 }
199 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
200 
201 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
202 				  struct hisi_sas_slot *slot)
203 {
204 	return hisi_hba->hw->prep_smp(hisi_hba, slot);
205 }
206 
207 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
208 				  struct hisi_sas_slot *slot, int is_tmf,
209 				  struct hisi_sas_tmf_task *tmf)
210 {
211 	return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
212 }
213 
214 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
215 				  struct hisi_sas_slot *slot)
216 {
217 	return hisi_hba->hw->prep_stp(hisi_hba, slot);
218 }
219 
220 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
221 		struct hisi_sas_slot *slot,
222 		int device_id, int abort_flag, int tag_to_abort)
223 {
224 	return hisi_hba->hw->prep_abort(hisi_hba, slot,
225 			device_id, abort_flag, tag_to_abort);
226 }
227 
228 /*
229  * This function will issue an abort TMF regardless of whether the
230  * task is in the sdev or not. Then it will do the task complete
231  * cleanup and callbacks.
232  */
233 static void hisi_sas_slot_abort(struct work_struct *work)
234 {
235 	struct hisi_sas_slot *abort_slot =
236 		container_of(work, struct hisi_sas_slot, abort_slot);
237 	struct sas_task *task = abort_slot->task;
238 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
239 	struct scsi_cmnd *cmnd = task->uldd_task;
240 	struct hisi_sas_tmf_task tmf_task;
241 	struct scsi_lun lun;
242 	struct device *dev = hisi_hba->dev;
243 	int tag = abort_slot->idx;
244 	unsigned long flags;
245 
246 	if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
247 		dev_err(dev, "cannot abort slot for non-ssp task\n");
248 		goto out;
249 	}
250 
251 	int_to_scsilun(cmnd->device->lun, &lun);
252 	tmf_task.tmf = TMF_ABORT_TASK;
253 	tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
254 
255 	hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
256 out:
257 	/* Do cleanup for this task */
258 	spin_lock_irqsave(&hisi_hba->lock, flags);
259 	hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
260 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
261 	if (task->task_done)
262 		task->task_done(task);
263 }
264 
265 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
266 		*dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
267 		int *pass)
268 {
269 	struct hisi_hba *hisi_hba = dq->hisi_hba;
270 	struct domain_device *device = task->dev;
271 	struct hisi_sas_device *sas_dev = device->lldd_dev;
272 	struct hisi_sas_port *port;
273 	struct hisi_sas_slot *slot;
274 	struct hisi_sas_cmd_hdr	*cmd_hdr_base;
275 	struct asd_sas_port *sas_port = device->port;
276 	struct device *dev = hisi_hba->dev;
277 	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
278 	unsigned long flags;
279 
280 	if (!sas_port) {
281 		struct task_status_struct *ts = &task->task_status;
282 
283 		ts->resp = SAS_TASK_UNDELIVERED;
284 		ts->stat = SAS_PHY_DOWN;
285 		/*
286 		 * libsas will use dev->port, should
287 		 * not call task_done for sata
288 		 */
289 		if (device->dev_type != SAS_SATA_DEV)
290 			task->task_done(task);
291 		return SAS_PHY_DOWN;
292 	}
293 
294 	if (DEV_IS_GONE(sas_dev)) {
295 		if (sas_dev)
296 			dev_info(dev, "task prep: device %d not ready\n",
297 				 sas_dev->device_id);
298 		else
299 			dev_info(dev, "task prep: device %016llx not ready\n",
300 				 SAS_ADDR(device->sas_addr));
301 
302 		return SAS_PHY_DOWN;
303 	}
304 
305 	port = to_hisi_sas_port(sas_port);
306 	if (port && !port->port_attached) {
307 		dev_info(dev, "task prep: %s port%d not attach device\n",
308 			 (dev_is_sata(device)) ?
309 			 "SATA/STP" : "SAS",
310 			 device->port->id);
311 
312 		return SAS_PHY_DOWN;
313 	}
314 
315 	if (!sas_protocol_ata(task->task_proto)) {
316 		if (task->num_scatter) {
317 			n_elem = dma_map_sg(dev, task->scatter,
318 					    task->num_scatter, task->data_dir);
319 			if (!n_elem) {
320 				rc = -ENOMEM;
321 				goto prep_out;
322 			}
323 		}
324 	} else
325 		n_elem = task->num_scatter;
326 
327 	spin_lock_irqsave(&hisi_hba->lock, flags);
328 	if (hisi_hba->hw->slot_index_alloc)
329 		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
330 						    device);
331 	else
332 		rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
333 	if (rc) {
334 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
335 		goto err_out;
336 	}
337 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
338 
339 	rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
340 	if (rc)
341 		goto err_out_tag;
342 
343 	dlvry_queue = dq->id;
344 	dlvry_queue_slot = dq->wr_point;
345 	slot = &hisi_hba->slot_info[slot_idx];
346 	memset(slot, 0, sizeof(struct hisi_sas_slot));
347 
348 	slot->idx = slot_idx;
349 	slot->n_elem = n_elem;
350 	slot->dlvry_queue = dlvry_queue;
351 	slot->dlvry_queue_slot = dlvry_queue_slot;
352 	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
353 	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
354 	slot->task = task;
355 	slot->port = port;
356 	task->lldd_task = slot;
357 	INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
358 
359 	slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
360 				   GFP_ATOMIC, &slot->buf_dma);
361 	if (!slot->buf) {
362 		rc = -ENOMEM;
363 		goto err_out_slot_buf;
364 	}
365 	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
366 	memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
367 	memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
368 
369 	switch (task->task_proto) {
370 	case SAS_PROTOCOL_SMP:
371 		rc = hisi_sas_task_prep_smp(hisi_hba, slot);
372 		break;
373 	case SAS_PROTOCOL_SSP:
374 		rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
375 		break;
376 	case SAS_PROTOCOL_SATA:
377 	case SAS_PROTOCOL_STP:
378 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
379 		rc = hisi_sas_task_prep_ata(hisi_hba, slot);
380 		break;
381 	default:
382 		dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
383 			task->task_proto);
384 		rc = -EINVAL;
385 		break;
386 	}
387 
388 	if (rc) {
389 		dev_err(dev, "task prep: rc = 0x%x\n", rc);
390 		goto err_out_buf;
391 	}
392 
393 	list_add_tail(&slot->entry, &sas_dev->list);
394 	spin_lock_irqsave(&task->task_state_lock, flags);
395 	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
396 	spin_unlock_irqrestore(&task->task_state_lock, flags);
397 
398 	dq->slot_prep = slot;
399 
400 	atomic64_inc(&sas_dev->running_req);
401 	++(*pass);
402 
403 	return 0;
404 
405 err_out_buf:
406 	dma_pool_free(hisi_hba->buffer_pool, slot->buf,
407 		slot->buf_dma);
408 err_out_slot_buf:
409 	/* Nothing to be done */
410 err_out_tag:
411 	spin_lock_irqsave(&hisi_hba->lock, flags);
412 	hisi_sas_slot_index_free(hisi_hba, slot_idx);
413 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
414 err_out:
415 	dev_err(dev, "task prep: failed[%d]!\n", rc);
416 	if (!sas_protocol_ata(task->task_proto))
417 		if (n_elem)
418 			dma_unmap_sg(dev, task->scatter, n_elem,
419 				     task->data_dir);
420 prep_out:
421 	return rc;
422 }
423 
424 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
425 			      int is_tmf, struct hisi_sas_tmf_task *tmf)
426 {
427 	u32 rc;
428 	u32 pass = 0;
429 	unsigned long flags;
430 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
431 	struct device *dev = hisi_hba->dev;
432 	struct domain_device *device = task->dev;
433 	struct hisi_sas_device *sas_dev = device->lldd_dev;
434 	struct hisi_sas_dq *dq = sas_dev->dq;
435 
436 	if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
437 		return -EINVAL;
438 
439 	/* protect task_prep and start_delivery sequence */
440 	spin_lock_irqsave(&dq->lock, flags);
441 	rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
442 	if (rc)
443 		dev_err(dev, "task exec: failed[%d]!\n", rc);
444 
445 	if (likely(pass))
446 		hisi_hba->hw->start_delivery(dq);
447 	spin_unlock_irqrestore(&dq->lock, flags);
448 
449 	return rc;
450 }
451 
452 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
453 {
454 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
455 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
456 	struct sas_ha_struct *sas_ha;
457 
458 	if (!phy->phy_attached)
459 		return;
460 
461 	sas_ha = &hisi_hba->sha;
462 	sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
463 
464 	if (sas_phy->phy) {
465 		struct sas_phy *sphy = sas_phy->phy;
466 
467 		sphy->negotiated_linkrate = sas_phy->linkrate;
468 		sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
469 		sphy->maximum_linkrate_hw =
470 			hisi_hba->hw->phy_get_max_linkrate();
471 		if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
472 			sphy->minimum_linkrate = phy->minimum_linkrate;
473 
474 		if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
475 			sphy->maximum_linkrate = phy->maximum_linkrate;
476 	}
477 
478 	if (phy->phy_type & PORT_TYPE_SAS) {
479 		struct sas_identify_frame *id;
480 
481 		id = (struct sas_identify_frame *)phy->frame_rcvd;
482 		id->dev_type = phy->identify.device_type;
483 		id->initiator_bits = SAS_PROTOCOL_ALL;
484 		id->target_bits = phy->identify.target_port_protocols;
485 	} else if (phy->phy_type & PORT_TYPE_SATA) {
486 		/*Nothing*/
487 	}
488 
489 	sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
490 	sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
491 }
492 
493 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
494 {
495 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
496 	struct hisi_sas_device *sas_dev = NULL;
497 	int i;
498 
499 	spin_lock(&hisi_hba->lock);
500 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
501 		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
502 			int queue = i % hisi_hba->queue_count;
503 			struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
504 
505 			hisi_hba->devices[i].device_id = i;
506 			sas_dev = &hisi_hba->devices[i];
507 			sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
508 			sas_dev->dev_type = device->dev_type;
509 			sas_dev->hisi_hba = hisi_hba;
510 			sas_dev->sas_device = device;
511 			sas_dev->dq = dq;
512 			INIT_LIST_HEAD(&hisi_hba->devices[i].list);
513 			break;
514 		}
515 	}
516 	spin_unlock(&hisi_hba->lock);
517 
518 	return sas_dev;
519 }
520 
521 static int hisi_sas_dev_found(struct domain_device *device)
522 {
523 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
524 	struct domain_device *parent_dev = device->parent;
525 	struct hisi_sas_device *sas_dev;
526 	struct device *dev = hisi_hba->dev;
527 
528 	if (hisi_hba->hw->alloc_dev)
529 		sas_dev = hisi_hba->hw->alloc_dev(device);
530 	else
531 		sas_dev = hisi_sas_alloc_dev(device);
532 	if (!sas_dev) {
533 		dev_err(dev, "fail alloc dev: max support %d devices\n",
534 			HISI_SAS_MAX_DEVICES);
535 		return -EINVAL;
536 	}
537 
538 	device->lldd_dev = sas_dev;
539 	hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
540 
541 	if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
542 		int phy_no;
543 		u8 phy_num = parent_dev->ex_dev.num_phys;
544 		struct ex_phy *phy;
545 
546 		for (phy_no = 0; phy_no < phy_num; phy_no++) {
547 			phy = &parent_dev->ex_dev.ex_phy[phy_no];
548 			if (SAS_ADDR(phy->attached_sas_addr) ==
549 				SAS_ADDR(device->sas_addr)) {
550 				sas_dev->attached_phy = phy_no;
551 				break;
552 			}
553 		}
554 
555 		if (phy_no == phy_num) {
556 			dev_info(dev, "dev found: no attached "
557 				 "dev:%016llx at ex:%016llx\n",
558 				 SAS_ADDR(device->sas_addr),
559 				 SAS_ADDR(parent_dev->sas_addr));
560 			return -EINVAL;
561 		}
562 	}
563 
564 	return 0;
565 }
566 
567 static int hisi_sas_slave_configure(struct scsi_device *sdev)
568 {
569 	struct domain_device *dev = sdev_to_domain_dev(sdev);
570 	int ret = sas_slave_configure(sdev);
571 
572 	if (ret)
573 		return ret;
574 	if (!dev_is_sata(dev))
575 		sas_change_queue_depth(sdev, 64);
576 
577 	return 0;
578 }
579 
580 static void hisi_sas_scan_start(struct Scsi_Host *shost)
581 {
582 	struct hisi_hba *hisi_hba = shost_priv(shost);
583 
584 	hisi_hba->hw->phys_init(hisi_hba);
585 }
586 
587 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
588 {
589 	struct hisi_hba *hisi_hba = shost_priv(shost);
590 	struct sas_ha_struct *sha = &hisi_hba->sha;
591 
592 	/* Wait for PHY up interrupt to occur */
593 	if (time < HZ)
594 		return 0;
595 
596 	sas_drain_work(sha);
597 	return 1;
598 }
599 
600 static void hisi_sas_phyup_work(struct work_struct *work)
601 {
602 	struct hisi_sas_phy *phy =
603 		container_of(work, struct hisi_sas_phy, phyup_ws);
604 	struct hisi_hba *hisi_hba = phy->hisi_hba;
605 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
606 	int phy_no = sas_phy->id;
607 
608 	hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
609 	hisi_sas_bytes_dmaed(hisi_hba, phy_no);
610 }
611 
612 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
613 {
614 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
615 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
616 
617 	phy->hisi_hba = hisi_hba;
618 	phy->port = NULL;
619 	init_timer(&phy->timer);
620 	sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
621 	sas_phy->class = SAS;
622 	sas_phy->iproto = SAS_PROTOCOL_ALL;
623 	sas_phy->tproto = 0;
624 	sas_phy->type = PHY_TYPE_PHYSICAL;
625 	sas_phy->role = PHY_ROLE_INITIATOR;
626 	sas_phy->oob_mode = OOB_NOT_CONNECTED;
627 	sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
628 	sas_phy->id = phy_no;
629 	sas_phy->sas_addr = &hisi_hba->sas_addr[0];
630 	sas_phy->frame_rcvd = &phy->frame_rcvd[0];
631 	sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
632 	sas_phy->lldd_phy = phy;
633 
634 	INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
635 }
636 
637 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
638 {
639 	struct sas_ha_struct *sas_ha = sas_phy->ha;
640 	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
641 	struct hisi_sas_phy *phy = sas_phy->lldd_phy;
642 	struct asd_sas_port *sas_port = sas_phy->port;
643 	struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
644 	unsigned long flags;
645 
646 	if (!sas_port)
647 		return;
648 
649 	spin_lock_irqsave(&hisi_hba->lock, flags);
650 	port->port_attached = 1;
651 	port->id = phy->port_id;
652 	phy->port = port;
653 	sas_port->lldd_port = port;
654 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
655 }
656 
657 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
658 				     struct hisi_sas_slot *slot)
659 {
660 	if (task) {
661 		unsigned long flags;
662 		struct task_status_struct *ts;
663 
664 		ts = &task->task_status;
665 
666 		ts->resp = SAS_TASK_COMPLETE;
667 		ts->stat = SAS_ABORTED_TASK;
668 		spin_lock_irqsave(&task->task_state_lock, flags);
669 		task->task_state_flags &=
670 			~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
671 		task->task_state_flags |= SAS_TASK_STATE_DONE;
672 		spin_unlock_irqrestore(&task->task_state_lock, flags);
673 	}
674 
675 	hisi_sas_slot_task_free(hisi_hba, task, slot);
676 }
677 
678 /* hisi_hba.lock should be locked */
679 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
680 			struct domain_device *device)
681 {
682 	struct hisi_sas_slot *slot, *slot2;
683 	struct hisi_sas_device *sas_dev = device->lldd_dev;
684 
685 	list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
686 		hisi_sas_do_release_task(hisi_hba, slot->task, slot);
687 }
688 
689 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
690 {
691 	struct hisi_sas_device *sas_dev;
692 	struct domain_device *device;
693 	int i;
694 
695 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
696 		sas_dev = &hisi_hba->devices[i];
697 		device = sas_dev->sas_device;
698 
699 		if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
700 		    !device)
701 			continue;
702 
703 		hisi_sas_release_task(hisi_hba, device);
704 	}
705 }
706 
707 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
708 				struct domain_device *device)
709 {
710 	if (hisi_hba->hw->dereg_device)
711 		hisi_hba->hw->dereg_device(hisi_hba, device);
712 }
713 
714 static void hisi_sas_dev_gone(struct domain_device *device)
715 {
716 	struct hisi_sas_device *sas_dev = device->lldd_dev;
717 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
718 	struct device *dev = hisi_hba->dev;
719 	int dev_id = sas_dev->device_id;
720 
721 	dev_info(dev, "found dev[%d:%x] is gone\n",
722 		 sas_dev->device_id, sas_dev->dev_type);
723 
724 	hisi_sas_internal_task_abort(hisi_hba, device,
725 				     HISI_SAS_INT_ABT_DEV, 0);
726 
727 	hisi_sas_dereg_device(hisi_hba, device);
728 
729 	hisi_hba->hw->free_device(hisi_hba, sas_dev);
730 	device->lldd_dev = NULL;
731 	memset(sas_dev, 0, sizeof(*sas_dev));
732 	sas_dev->device_id = dev_id;
733 	sas_dev->dev_type = SAS_PHY_UNUSED;
734 	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
735 }
736 
737 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
738 {
739 	return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
740 }
741 
742 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
743 				void *funcdata)
744 {
745 	struct sas_ha_struct *sas_ha = sas_phy->ha;
746 	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
747 	int phy_no = sas_phy->id;
748 
749 	switch (func) {
750 	case PHY_FUNC_HARD_RESET:
751 		hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
752 		break;
753 
754 	case PHY_FUNC_LINK_RESET:
755 		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
756 		msleep(100);
757 		hisi_hba->hw->phy_enable(hisi_hba, phy_no);
758 		break;
759 
760 	case PHY_FUNC_DISABLE:
761 		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
762 		break;
763 
764 	case PHY_FUNC_SET_LINK_RATE:
765 		hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
766 		break;
767 
768 	case PHY_FUNC_RELEASE_SPINUP_HOLD:
769 	default:
770 		return -EOPNOTSUPP;
771 	}
772 	return 0;
773 }
774 
775 static void hisi_sas_task_done(struct sas_task *task)
776 {
777 	if (!del_timer(&task->slow_task->timer))
778 		return;
779 	complete(&task->slow_task->completion);
780 }
781 
782 static void hisi_sas_tmf_timedout(unsigned long data)
783 {
784 	struct sas_task *task = (struct sas_task *)data;
785 	unsigned long flags;
786 
787 	spin_lock_irqsave(&task->task_state_lock, flags);
788 	if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
789 		task->task_state_flags |= SAS_TASK_STATE_ABORTED;
790 	spin_unlock_irqrestore(&task->task_state_lock, flags);
791 
792 	complete(&task->slow_task->completion);
793 }
794 
795 #define TASK_TIMEOUT 20
796 #define TASK_RETRY 3
797 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
798 					   void *parameter, u32 para_len,
799 					   struct hisi_sas_tmf_task *tmf)
800 {
801 	struct hisi_sas_device *sas_dev = device->lldd_dev;
802 	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
803 	struct device *dev = hisi_hba->dev;
804 	struct sas_task *task;
805 	int res, retry;
806 
807 	for (retry = 0; retry < TASK_RETRY; retry++) {
808 		task = sas_alloc_slow_task(GFP_KERNEL);
809 		if (!task)
810 			return -ENOMEM;
811 
812 		task->dev = device;
813 		task->task_proto = device->tproto;
814 
815 		if (dev_is_sata(device)) {
816 			task->ata_task.device_control_reg_update = 1;
817 			memcpy(&task->ata_task.fis, parameter, para_len);
818 		} else {
819 			memcpy(&task->ssp_task, parameter, para_len);
820 		}
821 		task->task_done = hisi_sas_task_done;
822 
823 		task->slow_task->timer.data = (unsigned long) task;
824 		task->slow_task->timer.function = hisi_sas_tmf_timedout;
825 		task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
826 		add_timer(&task->slow_task->timer);
827 
828 		res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
829 
830 		if (res) {
831 			del_timer(&task->slow_task->timer);
832 			dev_err(dev, "abort tmf: executing internal task failed: %d\n",
833 				res);
834 			goto ex_err;
835 		}
836 
837 		wait_for_completion(&task->slow_task->completion);
838 		res = TMF_RESP_FUNC_FAILED;
839 		/* Even TMF timed out, return direct. */
840 		if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
841 			if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
842 				struct hisi_sas_slot *slot = task->lldd_task;
843 
844 				dev_err(dev, "abort tmf: TMF task timeout\n");
845 				if (slot)
846 					slot->task = NULL;
847 
848 				goto ex_err;
849 			}
850 		}
851 
852 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
853 		     task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
854 			res = TMF_RESP_FUNC_COMPLETE;
855 			break;
856 		}
857 
858 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
859 			task->task_status.stat == TMF_RESP_FUNC_SUCC) {
860 			res = TMF_RESP_FUNC_SUCC;
861 			break;
862 		}
863 
864 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
865 		      task->task_status.stat == SAS_DATA_UNDERRUN) {
866 			/* no error, but return the number of bytes of
867 			 * underrun
868 			 */
869 			dev_warn(dev, "abort tmf: task to dev %016llx "
870 				 "resp: 0x%x sts 0x%x underrun\n",
871 				 SAS_ADDR(device->sas_addr),
872 				 task->task_status.resp,
873 				 task->task_status.stat);
874 			res = task->task_status.residual;
875 			break;
876 		}
877 
878 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
879 			task->task_status.stat == SAS_DATA_OVERRUN) {
880 			dev_warn(dev, "abort tmf: blocked task error\n");
881 			res = -EMSGSIZE;
882 			break;
883 		}
884 
885 		dev_warn(dev, "abort tmf: task to dev "
886 			 "%016llx resp: 0x%x status 0x%x\n",
887 			 SAS_ADDR(device->sas_addr), task->task_status.resp,
888 			 task->task_status.stat);
889 		sas_free_task(task);
890 		task = NULL;
891 	}
892 ex_err:
893 	if (retry == TASK_RETRY)
894 		dev_warn(dev, "abort tmf: executing internal task failed!\n");
895 	sas_free_task(task);
896 	return res;
897 }
898 
899 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
900 		bool reset, int pmp, u8 *fis)
901 {
902 	struct ata_taskfile tf;
903 
904 	ata_tf_init(dev, &tf);
905 	if (reset)
906 		tf.ctl |= ATA_SRST;
907 	else
908 		tf.ctl &= ~ATA_SRST;
909 	tf.command = ATA_CMD_DEV_RESET;
910 	ata_tf_to_fis(&tf, pmp, 0, fis);
911 }
912 
913 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
914 {
915 	u8 fis[20] = {0};
916 	struct ata_port *ap = device->sata_dev.ap;
917 	struct ata_link *link;
918 	int rc = TMF_RESP_FUNC_FAILED;
919 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
920 	struct device *dev = hisi_hba->dev;
921 	int s = sizeof(struct host_to_dev_fis);
922 	unsigned long flags;
923 
924 	ata_for_each_link(link, ap, EDGE) {
925 		int pmp = sata_srst_pmp(link);
926 
927 		hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
928 		rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
929 		if (rc != TMF_RESP_FUNC_COMPLETE)
930 			break;
931 	}
932 
933 	if (rc == TMF_RESP_FUNC_COMPLETE) {
934 		ata_for_each_link(link, ap, EDGE) {
935 			int pmp = sata_srst_pmp(link);
936 
937 			hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
938 			rc = hisi_sas_exec_internal_tmf_task(device, fis,
939 							     s, NULL);
940 			if (rc != TMF_RESP_FUNC_COMPLETE)
941 				dev_err(dev, "ata disk de-reset failed\n");
942 		}
943 	} else {
944 		dev_err(dev, "ata disk reset failed\n");
945 	}
946 
947 	if (rc == TMF_RESP_FUNC_COMPLETE) {
948 		spin_lock_irqsave(&hisi_hba->lock, flags);
949 		hisi_sas_release_task(hisi_hba, device);
950 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
951 	}
952 
953 	return rc;
954 }
955 
956 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
957 				u8 *lun, struct hisi_sas_tmf_task *tmf)
958 {
959 	struct sas_ssp_task ssp_task;
960 
961 	if (!(device->tproto & SAS_PROTOCOL_SSP))
962 		return TMF_RESP_FUNC_ESUPP;
963 
964 	memcpy(ssp_task.LUN, lun, 8);
965 
966 	return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
967 				sizeof(ssp_task), tmf);
968 }
969 
970 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
971 {
972 	int rc;
973 
974 	if (!hisi_hba->hw->soft_reset)
975 		return -1;
976 
977 	if (!test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
978 		struct device *dev = hisi_hba->dev;
979 		struct sas_ha_struct *sas_ha = &hisi_hba->sha;
980 		unsigned long flags;
981 
982 		dev_dbg(dev, "controller reset begins!\n");
983 		scsi_block_requests(hisi_hba->shost);
984 		rc = hisi_hba->hw->soft_reset(hisi_hba);
985 		if (rc) {
986 			dev_warn(dev, "controller reset failed (%d)\n", rc);
987 			goto out;
988 		}
989 		spin_lock_irqsave(&hisi_hba->lock, flags);
990 		hisi_sas_release_tasks(hisi_hba);
991 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
992 
993 		sas_ha->notify_ha_event(sas_ha, HAE_RESET);
994 		dev_dbg(dev, "controller reset successful!\n");
995 	} else
996 		return -1;
997 
998 out:
999 	scsi_unblock_requests(hisi_hba->shost);
1000 	clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1001 	return rc;
1002 }
1003 
1004 static int hisi_sas_abort_task(struct sas_task *task)
1005 {
1006 	struct scsi_lun lun;
1007 	struct hisi_sas_tmf_task tmf_task;
1008 	struct domain_device *device = task->dev;
1009 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1010 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1011 	struct device *dev = hisi_hba->dev;
1012 	int rc = TMF_RESP_FUNC_FAILED;
1013 	unsigned long flags;
1014 
1015 	if (!sas_dev) {
1016 		dev_warn(dev, "Device has been removed\n");
1017 		return TMF_RESP_FUNC_FAILED;
1018 	}
1019 
1020 	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1021 		rc = TMF_RESP_FUNC_COMPLETE;
1022 		goto out;
1023 	}
1024 
1025 	sas_dev->dev_status = HISI_SAS_DEV_EH;
1026 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1027 		struct scsi_cmnd *cmnd = task->uldd_task;
1028 		struct hisi_sas_slot *slot = task->lldd_task;
1029 		u32 tag = slot->idx;
1030 		int rc2;
1031 
1032 		int_to_scsilun(cmnd->device->lun, &lun);
1033 		tmf_task.tmf = TMF_ABORT_TASK;
1034 		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1035 
1036 		rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1037 						  &tmf_task);
1038 
1039 		rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1040 						   HISI_SAS_INT_ABT_CMD, tag);
1041 		/*
1042 		 * If the TMF finds that the IO is not in the device and also
1043 		 * the internal abort does not succeed, then it is safe to
1044 		 * free the slot.
1045 		 * Note: if the internal abort succeeds then the slot
1046 		 * will have already been completed
1047 		 */
1048 		if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1049 			if (task->lldd_task) {
1050 				spin_lock_irqsave(&hisi_hba->lock, flags);
1051 				hisi_sas_do_release_task(hisi_hba, task, slot);
1052 				spin_unlock_irqrestore(&hisi_hba->lock, flags);
1053 			}
1054 		}
1055 	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
1056 		task->task_proto & SAS_PROTOCOL_STP) {
1057 		if (task->dev->dev_type == SAS_SATA_DEV) {
1058 			hisi_sas_internal_task_abort(hisi_hba, device,
1059 						     HISI_SAS_INT_ABT_DEV, 0);
1060 			hisi_sas_dereg_device(hisi_hba, device);
1061 			rc = hisi_sas_softreset_ata_disk(device);
1062 		}
1063 	} else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1064 		/* SMP */
1065 		struct hisi_sas_slot *slot = task->lldd_task;
1066 		u32 tag = slot->idx;
1067 
1068 		rc = hisi_sas_internal_task_abort(hisi_hba, device,
1069 			     HISI_SAS_INT_ABT_CMD, tag);
1070 		if (rc == TMF_RESP_FUNC_FAILED) {
1071 			spin_lock_irqsave(&hisi_hba->lock, flags);
1072 			hisi_sas_do_release_task(hisi_hba, task, slot);
1073 			spin_unlock_irqrestore(&hisi_hba->lock, flags);
1074 		}
1075 	}
1076 
1077 out:
1078 	if (rc != TMF_RESP_FUNC_COMPLETE)
1079 		dev_notice(dev, "abort task: rc=%d\n", rc);
1080 	return rc;
1081 }
1082 
1083 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1084 {
1085 	struct hisi_sas_tmf_task tmf_task;
1086 	int rc = TMF_RESP_FUNC_FAILED;
1087 
1088 	tmf_task.tmf = TMF_ABORT_TASK_SET;
1089 	rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1090 
1091 	return rc;
1092 }
1093 
1094 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1095 {
1096 	int rc = TMF_RESP_FUNC_FAILED;
1097 	struct hisi_sas_tmf_task tmf_task;
1098 
1099 	tmf_task.tmf = TMF_CLEAR_ACA;
1100 	rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1101 
1102 	return rc;
1103 }
1104 
1105 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1106 {
1107 	struct sas_phy *phy = sas_get_local_phy(device);
1108 	int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1109 			(device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1110 	rc = sas_phy_reset(phy, reset_type);
1111 	sas_put_local_phy(phy);
1112 	msleep(2000);
1113 	return rc;
1114 }
1115 
1116 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1117 {
1118 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1119 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1120 	unsigned long flags;
1121 	int rc = TMF_RESP_FUNC_FAILED;
1122 
1123 	if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1124 		return TMF_RESP_FUNC_FAILED;
1125 	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1126 
1127 	hisi_sas_internal_task_abort(hisi_hba, device,
1128 					HISI_SAS_INT_ABT_DEV, 0);
1129 	hisi_sas_dereg_device(hisi_hba, device);
1130 
1131 	rc = hisi_sas_debug_I_T_nexus_reset(device);
1132 
1133 	if (rc == TMF_RESP_FUNC_COMPLETE) {
1134 		spin_lock_irqsave(&hisi_hba->lock, flags);
1135 		hisi_sas_release_task(hisi_hba, device);
1136 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
1137 	}
1138 	return rc;
1139 }
1140 
1141 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1142 {
1143 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1144 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1145 	struct device *dev = hisi_hba->dev;
1146 	unsigned long flags;
1147 	int rc = TMF_RESP_FUNC_FAILED;
1148 
1149 	sas_dev->dev_status = HISI_SAS_DEV_EH;
1150 	if (dev_is_sata(device)) {
1151 		struct sas_phy *phy;
1152 
1153 		/* Clear internal IO and then hardreset */
1154 		rc = hisi_sas_internal_task_abort(hisi_hba, device,
1155 						  HISI_SAS_INT_ABT_DEV, 0);
1156 		if (rc == TMF_RESP_FUNC_FAILED)
1157 			goto out;
1158 		hisi_sas_dereg_device(hisi_hba, device);
1159 
1160 		phy = sas_get_local_phy(device);
1161 
1162 		rc = sas_phy_reset(phy, 1);
1163 
1164 		if (rc == 0) {
1165 			spin_lock_irqsave(&hisi_hba->lock, flags);
1166 			hisi_sas_release_task(hisi_hba, device);
1167 			spin_unlock_irqrestore(&hisi_hba->lock, flags);
1168 		}
1169 		sas_put_local_phy(phy);
1170 	} else {
1171 		struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
1172 
1173 		rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1174 		if (rc == TMF_RESP_FUNC_COMPLETE) {
1175 			spin_lock_irqsave(&hisi_hba->lock, flags);
1176 			hisi_sas_release_task(hisi_hba, device);
1177 			spin_unlock_irqrestore(&hisi_hba->lock, flags);
1178 		}
1179 	}
1180 out:
1181 	if (rc != TMF_RESP_FUNC_COMPLETE)
1182 		dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1183 			     sas_dev->device_id, rc);
1184 	return rc;
1185 }
1186 
1187 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1188 {
1189 	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1190 
1191 	return hisi_sas_controller_reset(hisi_hba);
1192 }
1193 
1194 static int hisi_sas_query_task(struct sas_task *task)
1195 {
1196 	struct scsi_lun lun;
1197 	struct hisi_sas_tmf_task tmf_task;
1198 	int rc = TMF_RESP_FUNC_FAILED;
1199 
1200 	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1201 		struct scsi_cmnd *cmnd = task->uldd_task;
1202 		struct domain_device *device = task->dev;
1203 		struct hisi_sas_slot *slot = task->lldd_task;
1204 		u32 tag = slot->idx;
1205 
1206 		int_to_scsilun(cmnd->device->lun, &lun);
1207 		tmf_task.tmf = TMF_QUERY_TASK;
1208 		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1209 
1210 		rc = hisi_sas_debug_issue_ssp_tmf(device,
1211 						  lun.scsi_lun,
1212 						  &tmf_task);
1213 		switch (rc) {
1214 		/* The task is still in Lun, release it then */
1215 		case TMF_RESP_FUNC_SUCC:
1216 		/* The task is not in Lun or failed, reset the phy */
1217 		case TMF_RESP_FUNC_FAILED:
1218 		case TMF_RESP_FUNC_COMPLETE:
1219 			break;
1220 		default:
1221 			rc = TMF_RESP_FUNC_FAILED;
1222 			break;
1223 		}
1224 	}
1225 	return rc;
1226 }
1227 
1228 static int
1229 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1230 				  struct sas_task *task, int abort_flag,
1231 				  int task_tag)
1232 {
1233 	struct domain_device *device = task->dev;
1234 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1235 	struct device *dev = hisi_hba->dev;
1236 	struct hisi_sas_port *port;
1237 	struct hisi_sas_slot *slot;
1238 	struct asd_sas_port *sas_port = device->port;
1239 	struct hisi_sas_cmd_hdr *cmd_hdr_base;
1240 	struct hisi_sas_dq *dq = sas_dev->dq;
1241 	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1242 	unsigned long flags, flags_dq;
1243 
1244 	if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
1245 		return -EINVAL;
1246 
1247 	if (!device->port)
1248 		return -1;
1249 
1250 	port = to_hisi_sas_port(sas_port);
1251 
1252 	/* simply get a slot and send abort command */
1253 	spin_lock_irqsave(&hisi_hba->lock, flags);
1254 	rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1255 	if (rc) {
1256 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
1257 		goto err_out;
1258 	}
1259 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
1260 
1261 	spin_lock_irqsave(&dq->lock, flags_dq);
1262 	rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1263 	if (rc)
1264 		goto err_out_tag;
1265 
1266 	dlvry_queue = dq->id;
1267 	dlvry_queue_slot = dq->wr_point;
1268 
1269 	slot = &hisi_hba->slot_info[slot_idx];
1270 	memset(slot, 0, sizeof(struct hisi_sas_slot));
1271 
1272 	slot->idx = slot_idx;
1273 	slot->n_elem = n_elem;
1274 	slot->dlvry_queue = dlvry_queue;
1275 	slot->dlvry_queue_slot = dlvry_queue_slot;
1276 	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1277 	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1278 	slot->task = task;
1279 	slot->port = port;
1280 	task->lldd_task = slot;
1281 
1282 	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1283 
1284 	rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1285 				      abort_flag, task_tag);
1286 	if (rc)
1287 		goto err_out_tag;
1288 
1289 
1290 	list_add_tail(&slot->entry, &sas_dev->list);
1291 	spin_lock_irqsave(&task->task_state_lock, flags);
1292 	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1293 	spin_unlock_irqrestore(&task->task_state_lock, flags);
1294 
1295 	dq->slot_prep = slot;
1296 
1297 	atomic64_inc(&sas_dev->running_req);
1298 
1299 	/* send abort command to the chip */
1300 	hisi_hba->hw->start_delivery(dq);
1301 	spin_unlock_irqrestore(&dq->lock, flags_dq);
1302 
1303 	return 0;
1304 
1305 err_out_tag:
1306 	spin_lock_irqsave(&hisi_hba->lock, flags);
1307 	hisi_sas_slot_index_free(hisi_hba, slot_idx);
1308 	spin_unlock_irqrestore(&hisi_hba->lock, flags);
1309 	spin_unlock_irqrestore(&dq->lock, flags_dq);
1310 err_out:
1311 	dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1312 
1313 	return rc;
1314 }
1315 
1316 /**
1317  * hisi_sas_internal_task_abort -- execute an internal
1318  * abort command for single IO command or a device
1319  * @hisi_hba: host controller struct
1320  * @device: domain device
1321  * @abort_flag: mode of operation, device or single IO
1322  * @tag: tag of IO to be aborted (only relevant to single
1323  *       IO mode)
1324  */
1325 static int
1326 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1327 			     struct domain_device *device,
1328 			     int abort_flag, int tag)
1329 {
1330 	struct sas_task *task;
1331 	struct hisi_sas_device *sas_dev = device->lldd_dev;
1332 	struct device *dev = hisi_hba->dev;
1333 	int res;
1334 
1335 	if (!hisi_hba->hw->prep_abort)
1336 		return -EOPNOTSUPP;
1337 
1338 	task = sas_alloc_slow_task(GFP_KERNEL);
1339 	if (!task)
1340 		return -ENOMEM;
1341 
1342 	task->dev = device;
1343 	task->task_proto = device->tproto;
1344 	task->task_done = hisi_sas_task_done;
1345 	task->slow_task->timer.data = (unsigned long)task;
1346 	task->slow_task->timer.function = hisi_sas_tmf_timedout;
1347 	task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1348 	add_timer(&task->slow_task->timer);
1349 
1350 	res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1351 						task, abort_flag, tag);
1352 	if (res) {
1353 		del_timer(&task->slow_task->timer);
1354 		dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1355 			res);
1356 		goto exit;
1357 	}
1358 	wait_for_completion(&task->slow_task->completion);
1359 	res = TMF_RESP_FUNC_FAILED;
1360 
1361 	/* Internal abort timed out */
1362 	if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1363 		if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1364 			struct hisi_sas_slot *slot = task->lldd_task;
1365 
1366 			if (slot)
1367 				slot->task = NULL;
1368 			dev_err(dev, "internal task abort: timeout.\n");
1369 		}
1370 	}
1371 
1372 	if (task->task_status.resp == SAS_TASK_COMPLETE &&
1373 		task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1374 		res = TMF_RESP_FUNC_COMPLETE;
1375 		goto exit;
1376 	}
1377 
1378 	if (task->task_status.resp == SAS_TASK_COMPLETE &&
1379 		task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1380 		res = TMF_RESP_FUNC_SUCC;
1381 		goto exit;
1382 	}
1383 
1384 exit:
1385 	dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1386 		"resp: 0x%x sts 0x%x\n",
1387 		SAS_ADDR(device->sas_addr),
1388 		task,
1389 		task->task_status.resp, /* 0 is complete, -1 is undelivered */
1390 		task->task_status.stat);
1391 	sas_free_task(task);
1392 
1393 	return res;
1394 }
1395 
1396 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1397 {
1398 	hisi_sas_port_notify_formed(sas_phy);
1399 }
1400 
1401 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1402 {
1403 	phy->phy_attached = 0;
1404 	phy->phy_type = 0;
1405 	phy->port = NULL;
1406 }
1407 
1408 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1409 {
1410 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1411 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
1412 	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1413 
1414 	if (rdy) {
1415 		/* Phy down but ready */
1416 		hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1417 		hisi_sas_port_notify_formed(sas_phy);
1418 	} else {
1419 		struct hisi_sas_port *port  = phy->port;
1420 
1421 		/* Phy down and not ready */
1422 		sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1423 		sas_phy_disconnected(sas_phy);
1424 
1425 		if (port) {
1426 			if (phy->phy_type & PORT_TYPE_SAS) {
1427 				int port_id = port->id;
1428 
1429 				if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1430 								       port_id))
1431 					port->port_attached = 0;
1432 			} else if (phy->phy_type & PORT_TYPE_SATA)
1433 				port->port_attached = 0;
1434 		}
1435 		hisi_sas_phy_disconnected(phy);
1436 	}
1437 }
1438 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1439 
1440 void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1441 			      u32 state)
1442 {
1443 	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1444 	int phy_no;
1445 
1446 	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1447 		struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1448 		struct asd_sas_phy *sas_phy = &phy->sas_phy;
1449 		struct asd_sas_port *sas_port = sas_phy->port;
1450 		struct domain_device *dev;
1451 
1452 		if (sas_phy->enabled) {
1453 			/* Report PHY state change to libsas */
1454 			if (state & (1 << phy_no))
1455 				continue;
1456 
1457 			if (old_state & (1 << phy_no))
1458 				/* PHY down but was up before */
1459 				hisi_sas_phy_down(hisi_hba, phy_no, 0);
1460 		}
1461 		if (!sas_port)
1462 			continue;
1463 		dev = sas_port->port_dev;
1464 
1465 		if (DEV_IS_EXPANDER(dev->dev_type))
1466 			sas_ha->notify_phy_event(sas_phy, PORTE_BROADCAST_RCVD);
1467 	}
1468 }
1469 EXPORT_SYMBOL_GPL(hisi_sas_rescan_topology);
1470 
1471 struct scsi_transport_template *hisi_sas_stt;
1472 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1473 
1474 static struct scsi_host_template _hisi_sas_sht = {
1475 	.module			= THIS_MODULE,
1476 	.name			= DRV_NAME,
1477 	.queuecommand		= sas_queuecommand,
1478 	.target_alloc		= sas_target_alloc,
1479 	.slave_configure	= hisi_sas_slave_configure,
1480 	.scan_finished		= hisi_sas_scan_finished,
1481 	.scan_start		= hisi_sas_scan_start,
1482 	.change_queue_depth	= sas_change_queue_depth,
1483 	.bios_param		= sas_bios_param,
1484 	.can_queue		= 1,
1485 	.this_id		= -1,
1486 	.sg_tablesize		= SG_ALL,
1487 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
1488 	.use_clustering		= ENABLE_CLUSTERING,
1489 	.eh_device_reset_handler = sas_eh_device_reset_handler,
1490 	.eh_bus_reset_handler	= sas_eh_bus_reset_handler,
1491 	.target_destroy		= sas_target_destroy,
1492 	.ioctl			= sas_ioctl,
1493 };
1494 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1495 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1496 
1497 static struct sas_domain_function_template hisi_sas_transport_ops = {
1498 	.lldd_dev_found		= hisi_sas_dev_found,
1499 	.lldd_dev_gone		= hisi_sas_dev_gone,
1500 	.lldd_execute_task	= hisi_sas_queue_command,
1501 	.lldd_control_phy	= hisi_sas_control_phy,
1502 	.lldd_abort_task	= hisi_sas_abort_task,
1503 	.lldd_abort_task_set	= hisi_sas_abort_task_set,
1504 	.lldd_clear_aca		= hisi_sas_clear_aca,
1505 	.lldd_I_T_nexus_reset	= hisi_sas_I_T_nexus_reset,
1506 	.lldd_lu_reset		= hisi_sas_lu_reset,
1507 	.lldd_query_task	= hisi_sas_query_task,
1508 	.lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1509 	.lldd_port_formed	= hisi_sas_port_formed,
1510 };
1511 
1512 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1513 {
1514 	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1515 
1516 	for (i = 0; i < hisi_hba->queue_count; i++) {
1517 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1518 		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1519 
1520 		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1521 		memset(hisi_hba->cmd_hdr[i], 0, s);
1522 		dq->wr_point = 0;
1523 
1524 		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1525 		memset(hisi_hba->complete_hdr[i], 0, s);
1526 		cq->rd_point = 0;
1527 	}
1528 
1529 	s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1530 	memset(hisi_hba->initial_fis, 0, s);
1531 
1532 	s = max_command_entries * sizeof(struct hisi_sas_iost);
1533 	memset(hisi_hba->iost, 0, s);
1534 
1535 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1536 	memset(hisi_hba->breakpoint, 0, s);
1537 
1538 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1539 	memset(hisi_hba->sata_breakpoint, 0, s);
1540 }
1541 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1542 
1543 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1544 {
1545 	struct device *dev = hisi_hba->dev;
1546 	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1547 
1548 	spin_lock_init(&hisi_hba->lock);
1549 	for (i = 0; i < hisi_hba->n_phy; i++) {
1550 		hisi_sas_phy_init(hisi_hba, i);
1551 		hisi_hba->port[i].port_attached = 0;
1552 		hisi_hba->port[i].id = -1;
1553 	}
1554 
1555 	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1556 		hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1557 		hisi_hba->devices[i].device_id = i;
1558 		hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1559 	}
1560 
1561 	for (i = 0; i < hisi_hba->queue_count; i++) {
1562 		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1563 		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1564 
1565 		/* Completion queue structure */
1566 		cq->id = i;
1567 		cq->hisi_hba = hisi_hba;
1568 
1569 		/* Delivery queue structure */
1570 		dq->id = i;
1571 		dq->hisi_hba = hisi_hba;
1572 
1573 		/* Delivery queue */
1574 		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1575 		hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1576 					&hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1577 		if (!hisi_hba->cmd_hdr[i])
1578 			goto err_out;
1579 
1580 		/* Completion queue */
1581 		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1582 		hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1583 				&hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1584 		if (!hisi_hba->complete_hdr[i])
1585 			goto err_out;
1586 	}
1587 
1588 	s = sizeof(struct hisi_sas_slot_buf_table);
1589 	hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1590 	if (!hisi_hba->buffer_pool)
1591 		goto err_out;
1592 
1593 	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1594 	hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1595 					    GFP_KERNEL);
1596 	if (!hisi_hba->itct)
1597 		goto err_out;
1598 
1599 	memset(hisi_hba->itct, 0, s);
1600 
1601 	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1602 					   sizeof(struct hisi_sas_slot),
1603 					   GFP_KERNEL);
1604 	if (!hisi_hba->slot_info)
1605 		goto err_out;
1606 
1607 	s = max_command_entries * sizeof(struct hisi_sas_iost);
1608 	hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1609 					    GFP_KERNEL);
1610 	if (!hisi_hba->iost)
1611 		goto err_out;
1612 
1613 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1614 	hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1615 				&hisi_hba->breakpoint_dma, GFP_KERNEL);
1616 	if (!hisi_hba->breakpoint)
1617 		goto err_out;
1618 
1619 	hisi_hba->slot_index_count = max_command_entries;
1620 	s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1621 	hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1622 	if (!hisi_hba->slot_index_tags)
1623 		goto err_out;
1624 
1625 	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1626 	hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1627 				&hisi_hba->initial_fis_dma, GFP_KERNEL);
1628 	if (!hisi_hba->initial_fis)
1629 		goto err_out;
1630 
1631 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1632 	hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1633 				&hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1634 	if (!hisi_hba->sata_breakpoint)
1635 		goto err_out;
1636 	hisi_sas_init_mem(hisi_hba);
1637 
1638 	hisi_sas_slot_index_init(hisi_hba);
1639 
1640 	hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1641 	if (!hisi_hba->wq) {
1642 		dev_err(dev, "sas_alloc: failed to create workqueue\n");
1643 		goto err_out;
1644 	}
1645 
1646 	return 0;
1647 err_out:
1648 	return -ENOMEM;
1649 }
1650 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1651 
1652 void hisi_sas_free(struct hisi_hba *hisi_hba)
1653 {
1654 	struct device *dev = hisi_hba->dev;
1655 	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1656 
1657 	for (i = 0; i < hisi_hba->queue_count; i++) {
1658 		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1659 		if (hisi_hba->cmd_hdr[i])
1660 			dma_free_coherent(dev, s,
1661 					  hisi_hba->cmd_hdr[i],
1662 					  hisi_hba->cmd_hdr_dma[i]);
1663 
1664 		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1665 		if (hisi_hba->complete_hdr[i])
1666 			dma_free_coherent(dev, s,
1667 					  hisi_hba->complete_hdr[i],
1668 					  hisi_hba->complete_hdr_dma[i]);
1669 	}
1670 
1671 	dma_pool_destroy(hisi_hba->buffer_pool);
1672 
1673 	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1674 	if (hisi_hba->itct)
1675 		dma_free_coherent(dev, s,
1676 				  hisi_hba->itct, hisi_hba->itct_dma);
1677 
1678 	s = max_command_entries * sizeof(struct hisi_sas_iost);
1679 	if (hisi_hba->iost)
1680 		dma_free_coherent(dev, s,
1681 				  hisi_hba->iost, hisi_hba->iost_dma);
1682 
1683 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1684 	if (hisi_hba->breakpoint)
1685 		dma_free_coherent(dev, s,
1686 				  hisi_hba->breakpoint,
1687 				  hisi_hba->breakpoint_dma);
1688 
1689 
1690 	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1691 	if (hisi_hba->initial_fis)
1692 		dma_free_coherent(dev, s,
1693 				  hisi_hba->initial_fis,
1694 				  hisi_hba->initial_fis_dma);
1695 
1696 	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1697 	if (hisi_hba->sata_breakpoint)
1698 		dma_free_coherent(dev, s,
1699 				  hisi_hba->sata_breakpoint,
1700 				  hisi_hba->sata_breakpoint_dma);
1701 
1702 	if (hisi_hba->wq)
1703 		destroy_workqueue(hisi_hba->wq);
1704 }
1705 EXPORT_SYMBOL_GPL(hisi_sas_free);
1706 
1707 static void hisi_sas_rst_work_handler(struct work_struct *work)
1708 {
1709 	struct hisi_hba *hisi_hba =
1710 		container_of(work, struct hisi_hba, rst_work);
1711 
1712 	hisi_sas_controller_reset(hisi_hba);
1713 }
1714 
1715 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1716 {
1717 	struct device *dev = hisi_hba->dev;
1718 	struct platform_device *pdev = hisi_hba->platform_dev;
1719 	struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1720 	struct clk *refclk;
1721 
1722 	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1723 					  SAS_ADDR_SIZE)) {
1724 		dev_err(dev, "could not get property sas-addr\n");
1725 		return -ENOENT;
1726 	}
1727 
1728 	if (np) {
1729 		/*
1730 		 * These properties are only required for platform device-based
1731 		 * controller with DT firmware.
1732 		 */
1733 		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1734 					"hisilicon,sas-syscon");
1735 		if (IS_ERR(hisi_hba->ctrl)) {
1736 			dev_err(dev, "could not get syscon\n");
1737 			return -ENOENT;
1738 		}
1739 
1740 		if (device_property_read_u32(dev, "ctrl-reset-reg",
1741 					     &hisi_hba->ctrl_reset_reg)) {
1742 			dev_err(dev,
1743 				"could not get property ctrl-reset-reg\n");
1744 			return -ENOENT;
1745 		}
1746 
1747 		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1748 					     &hisi_hba->ctrl_reset_sts_reg)) {
1749 			dev_err(dev,
1750 				"could not get property ctrl-reset-sts-reg\n");
1751 			return -ENOENT;
1752 		}
1753 
1754 		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1755 					     &hisi_hba->ctrl_clock_ena_reg)) {
1756 			dev_err(dev,
1757 				"could not get property ctrl-clock-ena-reg\n");
1758 			return -ENOENT;
1759 		}
1760 	}
1761 
1762 	refclk = devm_clk_get(dev, NULL);
1763 	if (IS_ERR(refclk))
1764 		dev_dbg(dev, "no ref clk property\n");
1765 	else
1766 		hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1767 
1768 	if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
1769 		dev_err(dev, "could not get property phy-count\n");
1770 		return -ENOENT;
1771 	}
1772 
1773 	if (device_property_read_u32(dev, "queue-count",
1774 				     &hisi_hba->queue_count)) {
1775 		dev_err(dev, "could not get property queue-count\n");
1776 		return -ENOENT;
1777 	}
1778 
1779 	return 0;
1780 }
1781 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
1782 
1783 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1784 					      const struct hisi_sas_hw *hw)
1785 {
1786 	struct resource *res;
1787 	struct Scsi_Host *shost;
1788 	struct hisi_hba *hisi_hba;
1789 	struct device *dev = &pdev->dev;
1790 
1791 	shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1792 	if (!shost) {
1793 		dev_err(dev, "scsi host alloc failed\n");
1794 		return NULL;
1795 	}
1796 	hisi_hba = shost_priv(shost);
1797 
1798 	INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1799 	hisi_hba->hw = hw;
1800 	hisi_hba->dev = dev;
1801 	hisi_hba->platform_dev = pdev;
1802 	hisi_hba->shost = shost;
1803 	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1804 
1805 	init_timer(&hisi_hba->timer);
1806 
1807 	if (hisi_sas_get_fw_info(hisi_hba) < 0)
1808 		goto err_out;
1809 
1810 	if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1811 	    dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1812 		dev_err(dev, "No usable DMA addressing method\n");
1813 		goto err_out;
1814 	}
1815 
1816 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1817 	hisi_hba->regs = devm_ioremap_resource(dev, res);
1818 	if (IS_ERR(hisi_hba->regs))
1819 		goto err_out;
1820 
1821 	if (hisi_sas_alloc(hisi_hba, shost)) {
1822 		hisi_sas_free(hisi_hba);
1823 		goto err_out;
1824 	}
1825 
1826 	return shost;
1827 err_out:
1828 	kfree(shost);
1829 	dev_err(dev, "shost alloc failed\n");
1830 	return NULL;
1831 }
1832 
1833 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1834 {
1835 	int i;
1836 
1837 	for (i = 0; i < hisi_hba->n_phy; i++)
1838 		memcpy(&hisi_hba->phy[i].dev_sas_addr,
1839 		       hisi_hba->sas_addr,
1840 		       SAS_ADDR_SIZE);
1841 }
1842 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
1843 
1844 int hisi_sas_probe(struct platform_device *pdev,
1845 			 const struct hisi_sas_hw *hw)
1846 {
1847 	struct Scsi_Host *shost;
1848 	struct hisi_hba *hisi_hba;
1849 	struct device *dev = &pdev->dev;
1850 	struct asd_sas_phy **arr_phy;
1851 	struct asd_sas_port **arr_port;
1852 	struct sas_ha_struct *sha;
1853 	int rc, phy_nr, port_nr, i;
1854 
1855 	shost = hisi_sas_shost_alloc(pdev, hw);
1856 	if (!shost)
1857 		return -ENOMEM;
1858 
1859 	sha = SHOST_TO_SAS_HA(shost);
1860 	hisi_hba = shost_priv(shost);
1861 	platform_set_drvdata(pdev, sha);
1862 
1863 	phy_nr = port_nr = hisi_hba->n_phy;
1864 
1865 	arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1866 	arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1867 	if (!arr_phy || !arr_port) {
1868 		rc = -ENOMEM;
1869 		goto err_out_ha;
1870 	}
1871 
1872 	sha->sas_phy = arr_phy;
1873 	sha->sas_port = arr_port;
1874 	sha->lldd_ha = hisi_hba;
1875 
1876 	shost->transportt = hisi_sas_stt;
1877 	shost->max_id = HISI_SAS_MAX_DEVICES;
1878 	shost->max_lun = ~0;
1879 	shost->max_channel = 1;
1880 	shost->max_cmd_len = 16;
1881 	shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1882 	shost->can_queue = hisi_hba->hw->max_command_entries;
1883 	shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1884 
1885 	sha->sas_ha_name = DRV_NAME;
1886 	sha->dev = hisi_hba->dev;
1887 	sha->lldd_module = THIS_MODULE;
1888 	sha->sas_addr = &hisi_hba->sas_addr[0];
1889 	sha->num_phys = hisi_hba->n_phy;
1890 	sha->core.shost = hisi_hba->shost;
1891 
1892 	for (i = 0; i < hisi_hba->n_phy; i++) {
1893 		sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1894 		sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1895 	}
1896 
1897 	hisi_sas_init_add(hisi_hba);
1898 
1899 	rc = scsi_add_host(shost, &pdev->dev);
1900 	if (rc)
1901 		goto err_out_ha;
1902 
1903 	rc = sas_register_ha(sha);
1904 	if (rc)
1905 		goto err_out_register_ha;
1906 
1907 	rc = hisi_hba->hw->hw_init(hisi_hba);
1908 	if (rc)
1909 		goto err_out_register_ha;
1910 
1911 	scsi_scan_host(shost);
1912 
1913 	return 0;
1914 
1915 err_out_register_ha:
1916 	scsi_remove_host(shost);
1917 err_out_ha:
1918 	hisi_sas_free(hisi_hba);
1919 	kfree(shost);
1920 	return rc;
1921 }
1922 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1923 
1924 int hisi_sas_remove(struct platform_device *pdev)
1925 {
1926 	struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1927 	struct hisi_hba *hisi_hba = sha->lldd_ha;
1928 	struct Scsi_Host *shost = sha->core.shost;
1929 
1930 	sas_unregister_ha(sha);
1931 	sas_remove_host(sha->core.shost);
1932 
1933 	hisi_sas_free(hisi_hba);
1934 	kfree(shost);
1935 	return 0;
1936 }
1937 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1938 
1939 static __init int hisi_sas_init(void)
1940 {
1941 	pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1942 
1943 	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1944 	if (!hisi_sas_stt)
1945 		return -ENOMEM;
1946 
1947 	return 0;
1948 }
1949 
1950 static __exit void hisi_sas_exit(void)
1951 {
1952 	sas_release_transport(hisi_sas_stt);
1953 }
1954 
1955 module_init(hisi_sas_init);
1956 module_exit(hisi_sas_exit);
1957 
1958 MODULE_VERSION(DRV_VERSION);
1959 MODULE_LICENSE("GPL");
1960 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1961 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1962 MODULE_ALIAS("platform:" DRV_NAME);
1963