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scsi: hisi_sas: fix some sas_task.task_state_lock locking
[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
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 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
27 {
28 return device->port->ha->lldd_ha;
29 }
30
31 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
32 {
33 return container_of(sas_port, struct hisi_sas_port, sas_port);
34 }
35 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
36
37 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
38 {
39 void *bitmap = hisi_hba->slot_index_tags;
40
41 clear_bit(slot_idx, bitmap);
42 }
43
44 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
45 {
46 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
47 }
48
49 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
50 {
51 void *bitmap = hisi_hba->slot_index_tags;
52
53 set_bit(slot_idx, bitmap);
54 }
55
56 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
57 {
58 unsigned int index;
59 void *bitmap = hisi_hba->slot_index_tags;
60
61 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
62 if (index >= hisi_hba->slot_index_count)
63 return -SAS_QUEUE_FULL;
64 hisi_sas_slot_index_set(hisi_hba, index);
65 *slot_idx = index;
66 return 0;
67 }
68
69 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
70 {
71 int i;
72
73 for (i = 0; i < hisi_hba->slot_index_count; ++i)
74 hisi_sas_slot_index_clear(hisi_hba, i);
75 }
76
77 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
78 struct hisi_sas_slot *slot)
79 {
80 struct device *dev = &hisi_hba->pdev->dev;
81 struct domain_device *device = task->dev;
82 struct hisi_sas_device *sas_dev = device->lldd_dev;
83
84 if (!slot->task)
85 return;
86
87 if (!sas_protocol_ata(task->task_proto))
88 if (slot->n_elem)
89 dma_unmap_sg(dev, task->scatter, slot->n_elem,
90 task->data_dir);
91
92 if (slot->command_table)
93 dma_pool_free(hisi_hba->command_table_pool,
94 slot->command_table, slot->command_table_dma);
95
96 if (slot->status_buffer)
97 dma_pool_free(hisi_hba->status_buffer_pool,
98 slot->status_buffer, slot->status_buffer_dma);
99
100 if (slot->sge_page)
101 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
102 slot->sge_page_dma);
103
104 list_del_init(&slot->entry);
105 task->lldd_task = NULL;
106 slot->task = NULL;
107 slot->port = NULL;
108 hisi_sas_slot_index_free(hisi_hba, slot->idx);
109 if (sas_dev)
110 atomic64_dec(&sas_dev->running_req);
111 /* slot memory is fully zeroed when it is reused */
112 }
113 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
114
115 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
116 struct hisi_sas_slot *slot)
117 {
118 return hisi_hba->hw->prep_smp(hisi_hba, slot);
119 }
120
121 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
122 struct hisi_sas_slot *slot, int is_tmf,
123 struct hisi_sas_tmf_task *tmf)
124 {
125 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
126 }
127
128 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
129 struct hisi_sas_slot *slot)
130 {
131 return hisi_hba->hw->prep_stp(hisi_hba, slot);
132 }
133
134 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
135 struct hisi_sas_slot *slot,
136 int device_id, int abort_flag, int tag_to_abort)
137 {
138 return hisi_hba->hw->prep_abort(hisi_hba, slot,
139 device_id, abort_flag, tag_to_abort);
140 }
141
142 /*
143 * This function will issue an abort TMF regardless of whether the
144 * task is in the sdev or not. Then it will do the task complete
145 * cleanup and callbacks.
146 */
147 static void hisi_sas_slot_abort(struct work_struct *work)
148 {
149 struct hisi_sas_slot *abort_slot =
150 container_of(work, struct hisi_sas_slot, abort_slot);
151 struct sas_task *task = abort_slot->task;
152 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
153 struct scsi_cmnd *cmnd = task->uldd_task;
154 struct hisi_sas_tmf_task tmf_task;
155 struct scsi_lun lun;
156 struct device *dev = &hisi_hba->pdev->dev;
157 int tag = abort_slot->idx;
158 unsigned long flags;
159
160 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
161 dev_err(dev, "cannot abort slot for non-ssp task\n");
162 goto out;
163 }
164
165 int_to_scsilun(cmnd->device->lun, &lun);
166 tmf_task.tmf = TMF_ABORT_TASK;
167 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
168
169 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
170 out:
171 /* Do cleanup for this task */
172 spin_lock_irqsave(&hisi_hba->lock, flags);
173 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
174 spin_unlock_irqrestore(&hisi_hba->lock, flags);
175 if (task->task_done)
176 task->task_done(task);
177 }
178
179 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
180 int is_tmf, struct hisi_sas_tmf_task *tmf,
181 int *pass)
182 {
183 struct domain_device *device = task->dev;
184 struct hisi_sas_device *sas_dev = device->lldd_dev;
185 struct hisi_sas_port *port;
186 struct hisi_sas_slot *slot;
187 struct hisi_sas_cmd_hdr *cmd_hdr_base;
188 struct asd_sas_port *sas_port = device->port;
189 struct device *dev = &hisi_hba->pdev->dev;
190 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
191 unsigned long flags;
192
193 if (!sas_port) {
194 struct task_status_struct *ts = &task->task_status;
195
196 ts->resp = SAS_TASK_UNDELIVERED;
197 ts->stat = SAS_PHY_DOWN;
198 /*
199 * libsas will use dev->port, should
200 * not call task_done for sata
201 */
202 if (device->dev_type != SAS_SATA_DEV)
203 task->task_done(task);
204 return SAS_PHY_DOWN;
205 }
206
207 if (DEV_IS_GONE(sas_dev)) {
208 if (sas_dev)
209 dev_info(dev, "task prep: device %llu not ready\n",
210 sas_dev->device_id);
211 else
212 dev_info(dev, "task prep: device %016llx not ready\n",
213 SAS_ADDR(device->sas_addr));
214
215 return SAS_PHY_DOWN;
216 }
217
218 port = to_hisi_sas_port(sas_port);
219 if (port && !port->port_attached) {
220 dev_info(dev, "task prep: %s port%d not attach device\n",
221 (sas_protocol_ata(task->task_proto)) ?
222 "SATA/STP" : "SAS",
223 device->port->id);
224
225 return SAS_PHY_DOWN;
226 }
227
228 if (!sas_protocol_ata(task->task_proto)) {
229 if (task->num_scatter) {
230 n_elem = dma_map_sg(dev, task->scatter,
231 task->num_scatter, task->data_dir);
232 if (!n_elem) {
233 rc = -ENOMEM;
234 goto prep_out;
235 }
236 }
237 } else
238 n_elem = task->num_scatter;
239
240 if (hisi_hba->hw->slot_index_alloc)
241 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
242 device);
243 else
244 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
245 if (rc)
246 goto err_out;
247 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
248 &dlvry_queue, &dlvry_queue_slot);
249 if (rc)
250 goto err_out_tag;
251
252 slot = &hisi_hba->slot_info[slot_idx];
253 memset(slot, 0, sizeof(struct hisi_sas_slot));
254
255 slot->idx = slot_idx;
256 slot->n_elem = n_elem;
257 slot->dlvry_queue = dlvry_queue;
258 slot->dlvry_queue_slot = dlvry_queue_slot;
259 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
260 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
261 slot->task = task;
262 slot->port = port;
263 task->lldd_task = slot;
264 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
265
266 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
267 GFP_ATOMIC,
268 &slot->status_buffer_dma);
269 if (!slot->status_buffer) {
270 rc = -ENOMEM;
271 goto err_out_slot_buf;
272 }
273 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
274
275 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
276 GFP_ATOMIC,
277 &slot->command_table_dma);
278 if (!slot->command_table) {
279 rc = -ENOMEM;
280 goto err_out_status_buf;
281 }
282 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
283 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
284
285 switch (task->task_proto) {
286 case SAS_PROTOCOL_SMP:
287 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
288 break;
289 case SAS_PROTOCOL_SSP:
290 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
291 break;
292 case SAS_PROTOCOL_SATA:
293 case SAS_PROTOCOL_STP:
294 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
295 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
296 break;
297 default:
298 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
299 task->task_proto);
300 rc = -EINVAL;
301 break;
302 }
303
304 if (rc) {
305 dev_err(dev, "task prep: rc = 0x%x\n", rc);
306 if (slot->sge_page)
307 goto err_out_sge;
308 goto err_out_command_table;
309 }
310
311 list_add_tail(&slot->entry, &sas_dev->list);
312 spin_lock_irqsave(&task->task_state_lock, flags);
313 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
314 spin_unlock_irqrestore(&task->task_state_lock, flags);
315
316 hisi_hba->slot_prep = slot;
317
318 atomic64_inc(&sas_dev->running_req);
319 ++(*pass);
320
321 return 0;
322
323 err_out_sge:
324 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
325 slot->sge_page_dma);
326 err_out_command_table:
327 dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
328 slot->command_table_dma);
329 err_out_status_buf:
330 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
331 slot->status_buffer_dma);
332 err_out_slot_buf:
333 /* Nothing to be done */
334 err_out_tag:
335 hisi_sas_slot_index_free(hisi_hba, slot_idx);
336 err_out:
337 dev_err(dev, "task prep: failed[%d]!\n", rc);
338 if (!sas_protocol_ata(task->task_proto))
339 if (n_elem)
340 dma_unmap_sg(dev, task->scatter, n_elem,
341 task->data_dir);
342 prep_out:
343 return rc;
344 }
345
346 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
347 int is_tmf, struct hisi_sas_tmf_task *tmf)
348 {
349 u32 rc;
350 u32 pass = 0;
351 unsigned long flags;
352 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
353 struct device *dev = &hisi_hba->pdev->dev;
354
355 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
356 return -EINVAL;
357
358 /* protect task_prep and start_delivery sequence */
359 spin_lock_irqsave(&hisi_hba->lock, flags);
360 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
361 if (rc)
362 dev_err(dev, "task exec: failed[%d]!\n", rc);
363
364 if (likely(pass))
365 hisi_hba->hw->start_delivery(hisi_hba);
366 spin_unlock_irqrestore(&hisi_hba->lock, flags);
367
368 return rc;
369 }
370
371 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
372 {
373 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
374 struct asd_sas_phy *sas_phy = &phy->sas_phy;
375 struct sas_ha_struct *sas_ha;
376
377 if (!phy->phy_attached)
378 return;
379
380 sas_ha = &hisi_hba->sha;
381 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
382
383 if (sas_phy->phy) {
384 struct sas_phy *sphy = sas_phy->phy;
385
386 sphy->negotiated_linkrate = sas_phy->linkrate;
387 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
388 sphy->maximum_linkrate_hw =
389 hisi_hba->hw->phy_get_max_linkrate();
390 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
391 sphy->minimum_linkrate = phy->minimum_linkrate;
392
393 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
394 sphy->maximum_linkrate = phy->maximum_linkrate;
395 }
396
397 if (phy->phy_type & PORT_TYPE_SAS) {
398 struct sas_identify_frame *id;
399
400 id = (struct sas_identify_frame *)phy->frame_rcvd;
401 id->dev_type = phy->identify.device_type;
402 id->initiator_bits = SAS_PROTOCOL_ALL;
403 id->target_bits = phy->identify.target_port_protocols;
404 } else if (phy->phy_type & PORT_TYPE_SATA) {
405 /*Nothing*/
406 }
407
408 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
409 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
410 }
411
412 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
413 {
414 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
415 struct hisi_sas_device *sas_dev = NULL;
416 int i;
417
418 spin_lock(&hisi_hba->lock);
419 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
420 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
421 hisi_hba->devices[i].device_id = i;
422 sas_dev = &hisi_hba->devices[i];
423 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
424 sas_dev->dev_type = device->dev_type;
425 sas_dev->hisi_hba = hisi_hba;
426 sas_dev->sas_device = device;
427 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
428 break;
429 }
430 }
431 spin_unlock(&hisi_hba->lock);
432
433 return sas_dev;
434 }
435
436 static int hisi_sas_dev_found(struct domain_device *device)
437 {
438 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
439 struct domain_device *parent_dev = device->parent;
440 struct hisi_sas_device *sas_dev;
441 struct device *dev = &hisi_hba->pdev->dev;
442
443 if (hisi_hba->hw->alloc_dev)
444 sas_dev = hisi_hba->hw->alloc_dev(device);
445 else
446 sas_dev = hisi_sas_alloc_dev(device);
447 if (!sas_dev) {
448 dev_err(dev, "fail alloc dev: max support %d devices\n",
449 HISI_SAS_MAX_DEVICES);
450 return -EINVAL;
451 }
452
453 device->lldd_dev = sas_dev;
454 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
455
456 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
457 int phy_no;
458 u8 phy_num = parent_dev->ex_dev.num_phys;
459 struct ex_phy *phy;
460
461 for (phy_no = 0; phy_no < phy_num; phy_no++) {
462 phy = &parent_dev->ex_dev.ex_phy[phy_no];
463 if (SAS_ADDR(phy->attached_sas_addr) ==
464 SAS_ADDR(device->sas_addr)) {
465 sas_dev->attached_phy = phy_no;
466 break;
467 }
468 }
469
470 if (phy_no == phy_num) {
471 dev_info(dev, "dev found: no attached "
472 "dev:%016llx at ex:%016llx\n",
473 SAS_ADDR(device->sas_addr),
474 SAS_ADDR(parent_dev->sas_addr));
475 return -EINVAL;
476 }
477 }
478
479 return 0;
480 }
481
482 static int hisi_sas_slave_configure(struct scsi_device *sdev)
483 {
484 struct domain_device *dev = sdev_to_domain_dev(sdev);
485 int ret = sas_slave_configure(sdev);
486
487 if (ret)
488 return ret;
489 if (!dev_is_sata(dev))
490 sas_change_queue_depth(sdev, 64);
491
492 return 0;
493 }
494
495 static void hisi_sas_scan_start(struct Scsi_Host *shost)
496 {
497 struct hisi_hba *hisi_hba = shost_priv(shost);
498
499 hisi_hba->hw->phys_init(hisi_hba);
500 }
501
502 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
503 {
504 struct hisi_hba *hisi_hba = shost_priv(shost);
505 struct sas_ha_struct *sha = &hisi_hba->sha;
506
507 /* Wait for PHY up interrupt to occur */
508 if (time < HZ)
509 return 0;
510
511 sas_drain_work(sha);
512 return 1;
513 }
514
515 static void hisi_sas_phyup_work(struct work_struct *work)
516 {
517 struct hisi_sas_phy *phy =
518 container_of(work, struct hisi_sas_phy, phyup_ws);
519 struct hisi_hba *hisi_hba = phy->hisi_hba;
520 struct asd_sas_phy *sas_phy = &phy->sas_phy;
521 int phy_no = sas_phy->id;
522
523 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
524 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
525 }
526
527 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
528 {
529 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
530 struct asd_sas_phy *sas_phy = &phy->sas_phy;
531
532 phy->hisi_hba = hisi_hba;
533 phy->port = NULL;
534 init_timer(&phy->timer);
535 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
536 sas_phy->class = SAS;
537 sas_phy->iproto = SAS_PROTOCOL_ALL;
538 sas_phy->tproto = 0;
539 sas_phy->type = PHY_TYPE_PHYSICAL;
540 sas_phy->role = PHY_ROLE_INITIATOR;
541 sas_phy->oob_mode = OOB_NOT_CONNECTED;
542 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
543 sas_phy->id = phy_no;
544 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
545 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
546 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
547 sas_phy->lldd_phy = phy;
548
549 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
550 }
551
552 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
553 {
554 struct sas_ha_struct *sas_ha = sas_phy->ha;
555 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
556 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
557 struct asd_sas_port *sas_port = sas_phy->port;
558 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
559 unsigned long flags;
560
561 if (!sas_port)
562 return;
563
564 spin_lock_irqsave(&hisi_hba->lock, flags);
565 port->port_attached = 1;
566 port->id = phy->port_id;
567 phy->port = port;
568 sas_port->lldd_port = port;
569 spin_unlock_irqrestore(&hisi_hba->lock, flags);
570 }
571
572 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba,
573 struct sas_task *task,
574 struct hisi_sas_slot *slot)
575 {
576 struct task_status_struct *ts;
577 unsigned long flags;
578
579 if (!task)
580 return;
581
582 ts = &task->task_status;
583
584 ts->resp = SAS_TASK_COMPLETE;
585 ts->stat = SAS_ABORTED_TASK;
586 spin_lock_irqsave(&task->task_state_lock, flags);
587 task->task_state_flags &=
588 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
589 task->task_state_flags |= SAS_TASK_STATE_DONE;
590 spin_unlock_irqrestore(&task->task_state_lock, flags);
591
592 hisi_sas_slot_task_free(hisi_hba, task, slot);
593 }
594
595 /* hisi_hba.lock should be locked */
596 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
597 struct domain_device *device)
598 {
599 struct hisi_sas_slot *slot, *slot2;
600 struct hisi_sas_device *sas_dev = device->lldd_dev;
601
602 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
603 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
604 }
605
606 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
607 {
608 struct hisi_sas_device *sas_dev;
609 struct domain_device *device;
610 int i;
611
612 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
613 sas_dev = &hisi_hba->devices[i];
614 device = sas_dev->sas_device;
615
616 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
617 !device)
618 continue;
619
620 hisi_sas_release_task(hisi_hba, device);
621 }
622 }
623
624 static void hisi_sas_dev_gone(struct domain_device *device)
625 {
626 struct hisi_sas_device *sas_dev = device->lldd_dev;
627 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
628 struct device *dev = &hisi_hba->pdev->dev;
629 u64 dev_id = sas_dev->device_id;
630
631 dev_info(dev, "found dev[%lld:%x] is gone\n",
632 sas_dev->device_id, sas_dev->dev_type);
633
634 hisi_sas_internal_task_abort(hisi_hba, device,
635 HISI_SAS_INT_ABT_DEV, 0);
636
637 hisi_hba->hw->free_device(hisi_hba, sas_dev);
638 device->lldd_dev = NULL;
639 memset(sas_dev, 0, sizeof(*sas_dev));
640 sas_dev->device_id = dev_id;
641 sas_dev->dev_type = SAS_PHY_UNUSED;
642 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
643 }
644
645 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
646 {
647 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
648 }
649
650 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
651 void *funcdata)
652 {
653 struct sas_ha_struct *sas_ha = sas_phy->ha;
654 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
655 int phy_no = sas_phy->id;
656
657 switch (func) {
658 case PHY_FUNC_HARD_RESET:
659 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
660 break;
661
662 case PHY_FUNC_LINK_RESET:
663 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
664 msleep(100);
665 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
666 break;
667
668 case PHY_FUNC_DISABLE:
669 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
670 break;
671
672 case PHY_FUNC_SET_LINK_RATE:
673 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
674 break;
675
676 case PHY_FUNC_RELEASE_SPINUP_HOLD:
677 default:
678 return -EOPNOTSUPP;
679 }
680 return 0;
681 }
682
683 static void hisi_sas_task_done(struct sas_task *task)
684 {
685 if (!del_timer(&task->slow_task->timer))
686 return;
687 complete(&task->slow_task->completion);
688 }
689
690 static void hisi_sas_tmf_timedout(unsigned long data)
691 {
692 struct sas_task *task = (struct sas_task *)data;
693
694 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
695 complete(&task->slow_task->completion);
696 }
697
698 #define TASK_TIMEOUT 20
699 #define TASK_RETRY 3
700 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
701 void *parameter, u32 para_len,
702 struct hisi_sas_tmf_task *tmf)
703 {
704 struct hisi_sas_device *sas_dev = device->lldd_dev;
705 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
706 struct device *dev = &hisi_hba->pdev->dev;
707 struct sas_task *task;
708 int res, retry;
709
710 for (retry = 0; retry < TASK_RETRY; retry++) {
711 task = sas_alloc_slow_task(GFP_KERNEL);
712 if (!task)
713 return -ENOMEM;
714
715 task->dev = device;
716 task->task_proto = device->tproto;
717
718 if (dev_is_sata(device)) {
719 task->ata_task.device_control_reg_update = 1;
720 memcpy(&task->ata_task.fis, parameter, para_len);
721 } else {
722 memcpy(&task->ssp_task, parameter, para_len);
723 }
724 task->task_done = hisi_sas_task_done;
725
726 task->slow_task->timer.data = (unsigned long) task;
727 task->slow_task->timer.function = hisi_sas_tmf_timedout;
728 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
729 add_timer(&task->slow_task->timer);
730
731 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
732
733 if (res) {
734 del_timer(&task->slow_task->timer);
735 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
736 res);
737 goto ex_err;
738 }
739
740 wait_for_completion(&task->slow_task->completion);
741 res = TMF_RESP_FUNC_FAILED;
742 /* Even TMF timed out, return direct. */
743 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
744 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
745 dev_err(dev, "abort tmf: TMF task timeout\n");
746 if (task->lldd_task) {
747 struct hisi_sas_slot *slot =
748 task->lldd_task;
749
750 hisi_sas_slot_task_free(hisi_hba,
751 task, slot);
752 }
753
754 goto ex_err;
755 }
756 }
757
758 if (task->task_status.resp == SAS_TASK_COMPLETE &&
759 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
760 res = TMF_RESP_FUNC_COMPLETE;
761 break;
762 }
763
764 if (task->task_status.resp == SAS_TASK_COMPLETE &&
765 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
766 res = TMF_RESP_FUNC_SUCC;
767 break;
768 }
769
770 if (task->task_status.resp == SAS_TASK_COMPLETE &&
771 task->task_status.stat == SAS_DATA_UNDERRUN) {
772 /* no error, but return the number of bytes of
773 * underrun
774 */
775 dev_warn(dev, "abort tmf: task to dev %016llx "
776 "resp: 0x%x sts 0x%x underrun\n",
777 SAS_ADDR(device->sas_addr),
778 task->task_status.resp,
779 task->task_status.stat);
780 res = task->task_status.residual;
781 break;
782 }
783
784 if (task->task_status.resp == SAS_TASK_COMPLETE &&
785 task->task_status.stat == SAS_DATA_OVERRUN) {
786 dev_warn(dev, "abort tmf: blocked task error\n");
787 res = -EMSGSIZE;
788 break;
789 }
790
791 dev_warn(dev, "abort tmf: task to dev "
792 "%016llx resp: 0x%x status 0x%x\n",
793 SAS_ADDR(device->sas_addr), task->task_status.resp,
794 task->task_status.stat);
795 sas_free_task(task);
796 task = NULL;
797 }
798 ex_err:
799 if (retry == TASK_RETRY)
800 dev_warn(dev, "abort tmf: executing internal task failed!\n");
801 sas_free_task(task);
802 return res;
803 }
804
805 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
806 bool reset, int pmp, u8 *fis)
807 {
808 struct ata_taskfile tf;
809
810 ata_tf_init(dev, &tf);
811 if (reset)
812 tf.ctl |= ATA_SRST;
813 else
814 tf.ctl &= ~ATA_SRST;
815 tf.command = ATA_CMD_DEV_RESET;
816 ata_tf_to_fis(&tf, pmp, 0, fis);
817 }
818
819 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
820 {
821 u8 fis[20] = {0};
822 struct ata_port *ap = device->sata_dev.ap;
823 struct ata_link *link;
824 int rc = TMF_RESP_FUNC_FAILED;
825 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
826 struct device *dev = &hisi_hba->pdev->dev;
827 int s = sizeof(struct host_to_dev_fis);
828 unsigned long flags;
829
830 ata_for_each_link(link, ap, EDGE) {
831 int pmp = sata_srst_pmp(link);
832
833 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
834 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
835 if (rc != TMF_RESP_FUNC_COMPLETE)
836 break;
837 }
838
839 if (rc == TMF_RESP_FUNC_COMPLETE) {
840 ata_for_each_link(link, ap, EDGE) {
841 int pmp = sata_srst_pmp(link);
842
843 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
844 rc = hisi_sas_exec_internal_tmf_task(device, fis,
845 s, NULL);
846 if (rc != TMF_RESP_FUNC_COMPLETE)
847 dev_err(dev, "ata disk de-reset failed\n");
848 }
849 } else {
850 dev_err(dev, "ata disk reset failed\n");
851 }
852
853 if (rc == TMF_RESP_FUNC_COMPLETE) {
854 spin_lock_irqsave(&hisi_hba->lock, flags);
855 hisi_sas_release_task(hisi_hba, device);
856 spin_unlock_irqrestore(&hisi_hba->lock, flags);
857 }
858
859 return rc;
860 }
861
862 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
863 u8 *lun, struct hisi_sas_tmf_task *tmf)
864 {
865 struct sas_ssp_task ssp_task;
866
867 if (!(device->tproto & SAS_PROTOCOL_SSP))
868 return TMF_RESP_FUNC_ESUPP;
869
870 memcpy(ssp_task.LUN, lun, 8);
871
872 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
873 sizeof(ssp_task), tmf);
874 }
875
876 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
877 {
878 int rc;
879
880 if (!hisi_hba->hw->soft_reset)
881 return -1;
882
883 if (!test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
884 struct device *dev = &hisi_hba->pdev->dev;
885 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
886 unsigned long flags;
887
888 dev_dbg(dev, "controller reset begins!\n");
889 scsi_block_requests(hisi_hba->shost);
890 rc = hisi_hba->hw->soft_reset(hisi_hba);
891 if (rc) {
892 dev_warn(dev, "controller reset failed (%d)\n", rc);
893 goto out;
894 }
895 spin_lock_irqsave(&hisi_hba->lock, flags);
896 hisi_sas_release_tasks(hisi_hba);
897 spin_unlock_irqrestore(&hisi_hba->lock, flags);
898
899 sas_ha->notify_ha_event(sas_ha, HAE_RESET);
900 dev_dbg(dev, "controller reset successful!\n");
901 } else
902 return -1;
903
904 out:
905 scsi_unblock_requests(hisi_hba->shost);
906 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
907 return rc;
908 }
909
910 static int hisi_sas_abort_task(struct sas_task *task)
911 {
912 struct scsi_lun lun;
913 struct hisi_sas_tmf_task tmf_task;
914 struct domain_device *device = task->dev;
915 struct hisi_sas_device *sas_dev = device->lldd_dev;
916 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
917 struct device *dev = &hisi_hba->pdev->dev;
918 int rc = TMF_RESP_FUNC_FAILED;
919 unsigned long flags;
920
921 if (!sas_dev) {
922 dev_warn(dev, "Device has been removed\n");
923 return TMF_RESP_FUNC_FAILED;
924 }
925
926 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
927 rc = TMF_RESP_FUNC_COMPLETE;
928 goto out;
929 }
930
931 sas_dev->dev_status = HISI_SAS_DEV_EH;
932 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
933 struct scsi_cmnd *cmnd = task->uldd_task;
934 struct hisi_sas_slot *slot = task->lldd_task;
935 u32 tag = slot->idx;
936 int rc2;
937
938 int_to_scsilun(cmnd->device->lun, &lun);
939 tmf_task.tmf = TMF_ABORT_TASK;
940 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
941
942 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
943 &tmf_task);
944
945 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
946 HISI_SAS_INT_ABT_CMD, tag);
947 /*
948 * If the TMF finds that the IO is not in the device and also
949 * the internal abort does not succeed, then it is safe to
950 * free the slot.
951 * Note: if the internal abort succeeds then the slot
952 * will have already been completed
953 */
954 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
955 if (task->lldd_task) {
956 spin_lock_irqsave(&hisi_hba->lock, flags);
957 hisi_sas_do_release_task(hisi_hba, task, slot);
958 spin_unlock_irqrestore(&hisi_hba->lock, flags);
959 }
960 }
961 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
962 task->task_proto & SAS_PROTOCOL_STP) {
963 if (task->dev->dev_type == SAS_SATA_DEV) {
964 hisi_sas_internal_task_abort(hisi_hba, device,
965 HISI_SAS_INT_ABT_DEV, 0);
966 rc = hisi_sas_softreset_ata_disk(device);
967 }
968 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
969 /* SMP */
970 struct hisi_sas_slot *slot = task->lldd_task;
971 u32 tag = slot->idx;
972
973 hisi_sas_internal_task_abort(hisi_hba, device,
974 HISI_SAS_INT_ABT_CMD, tag);
975 }
976
977 out:
978 if (rc != TMF_RESP_FUNC_COMPLETE)
979 dev_notice(dev, "abort task: rc=%d\n", rc);
980 return rc;
981 }
982
983 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
984 {
985 struct hisi_sas_tmf_task tmf_task;
986 int rc = TMF_RESP_FUNC_FAILED;
987
988 tmf_task.tmf = TMF_ABORT_TASK_SET;
989 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
990
991 return rc;
992 }
993
994 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
995 {
996 int rc = TMF_RESP_FUNC_FAILED;
997 struct hisi_sas_tmf_task tmf_task;
998
999 tmf_task.tmf = TMF_CLEAR_ACA;
1000 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1001
1002 return rc;
1003 }
1004
1005 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1006 {
1007 struct sas_phy *phy = sas_get_local_phy(device);
1008 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1009 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1010 rc = sas_phy_reset(phy, reset_type);
1011 sas_put_local_phy(phy);
1012 msleep(2000);
1013 return rc;
1014 }
1015
1016 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1017 {
1018 struct hisi_sas_device *sas_dev = device->lldd_dev;
1019 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1020 unsigned long flags;
1021 int rc = TMF_RESP_FUNC_FAILED;
1022
1023 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1024 return TMF_RESP_FUNC_FAILED;
1025 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1026
1027 rc = hisi_sas_debug_I_T_nexus_reset(device);
1028
1029 if (rc == TMF_RESP_FUNC_COMPLETE) {
1030 spin_lock_irqsave(&hisi_hba->lock, flags);
1031 hisi_sas_release_task(hisi_hba, device);
1032 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1033 }
1034 return rc;
1035 }
1036
1037 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1038 {
1039 struct hisi_sas_device *sas_dev = device->lldd_dev;
1040 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1041 struct device *dev = &hisi_hba->pdev->dev;
1042 unsigned long flags;
1043 int rc = TMF_RESP_FUNC_FAILED;
1044
1045 sas_dev->dev_status = HISI_SAS_DEV_EH;
1046 if (dev_is_sata(device)) {
1047 struct sas_phy *phy;
1048
1049 /* Clear internal IO and then hardreset */
1050 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1051 HISI_SAS_INT_ABT_DEV, 0);
1052 if (rc == TMF_RESP_FUNC_FAILED)
1053 goto out;
1054
1055 phy = sas_get_local_phy(device);
1056
1057 rc = sas_phy_reset(phy, 1);
1058
1059 if (rc == 0) {
1060 spin_lock_irqsave(&hisi_hba->lock, flags);
1061 hisi_sas_release_task(hisi_hba, device);
1062 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1063 }
1064 sas_put_local_phy(phy);
1065 } else {
1066 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1067
1068 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1069 if (rc == TMF_RESP_FUNC_COMPLETE) {
1070 spin_lock_irqsave(&hisi_hba->lock, flags);
1071 hisi_sas_release_task(hisi_hba, device);
1072 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1073 }
1074 }
1075 out:
1076 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
1077 sas_dev->device_id, rc);
1078 return rc;
1079 }
1080
1081 static int hisi_sas_query_task(struct sas_task *task)
1082 {
1083 struct scsi_lun lun;
1084 struct hisi_sas_tmf_task tmf_task;
1085 int rc = TMF_RESP_FUNC_FAILED;
1086
1087 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1088 struct scsi_cmnd *cmnd = task->uldd_task;
1089 struct domain_device *device = task->dev;
1090 struct hisi_sas_slot *slot = task->lldd_task;
1091 u32 tag = slot->idx;
1092
1093 int_to_scsilun(cmnd->device->lun, &lun);
1094 tmf_task.tmf = TMF_QUERY_TASK;
1095 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1096
1097 rc = hisi_sas_debug_issue_ssp_tmf(device,
1098 lun.scsi_lun,
1099 &tmf_task);
1100 switch (rc) {
1101 /* The task is still in Lun, release it then */
1102 case TMF_RESP_FUNC_SUCC:
1103 /* The task is not in Lun or failed, reset the phy */
1104 case TMF_RESP_FUNC_FAILED:
1105 case TMF_RESP_FUNC_COMPLETE:
1106 break;
1107 default:
1108 rc = TMF_RESP_FUNC_FAILED;
1109 break;
1110 }
1111 }
1112 return rc;
1113 }
1114
1115 static int
1116 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id,
1117 struct sas_task *task, int abort_flag,
1118 int task_tag)
1119 {
1120 struct domain_device *device = task->dev;
1121 struct hisi_sas_device *sas_dev = device->lldd_dev;
1122 struct device *dev = &hisi_hba->pdev->dev;
1123 struct hisi_sas_port *port;
1124 struct hisi_sas_slot *slot;
1125 struct asd_sas_port *sas_port = device->port;
1126 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1127 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1128 unsigned long flags;
1129
1130 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
1131 return -EINVAL;
1132
1133 if (!device->port)
1134 return -1;
1135
1136 port = to_hisi_sas_port(sas_port);
1137
1138 /* simply get a slot and send abort command */
1139 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1140 if (rc)
1141 goto err_out;
1142 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
1143 &dlvry_queue, &dlvry_queue_slot);
1144 if (rc)
1145 goto err_out_tag;
1146
1147 slot = &hisi_hba->slot_info[slot_idx];
1148 memset(slot, 0, sizeof(struct hisi_sas_slot));
1149
1150 slot->idx = slot_idx;
1151 slot->n_elem = n_elem;
1152 slot->dlvry_queue = dlvry_queue;
1153 slot->dlvry_queue_slot = dlvry_queue_slot;
1154 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1155 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1156 slot->task = task;
1157 slot->port = port;
1158 task->lldd_task = slot;
1159
1160 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1161
1162 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1163 abort_flag, task_tag);
1164 if (rc)
1165 goto err_out_tag;
1166
1167
1168 list_add_tail(&slot->entry, &sas_dev->list);
1169 spin_lock_irqsave(&task->task_state_lock, flags);
1170 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1171 spin_unlock_irqrestore(&task->task_state_lock, flags);
1172
1173 hisi_hba->slot_prep = slot;
1174
1175 atomic64_inc(&sas_dev->running_req);
1176
1177 /* send abort command to our chip */
1178 hisi_hba->hw->start_delivery(hisi_hba);
1179
1180 return 0;
1181
1182 err_out_tag:
1183 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1184 err_out:
1185 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1186
1187 return rc;
1188 }
1189
1190 /**
1191 * hisi_sas_internal_task_abort -- execute an internal
1192 * abort command for single IO command or a device
1193 * @hisi_hba: host controller struct
1194 * @device: domain device
1195 * @abort_flag: mode of operation, device or single IO
1196 * @tag: tag of IO to be aborted (only relevant to single
1197 * IO mode)
1198 */
1199 static int
1200 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1201 struct domain_device *device,
1202 int abort_flag, int tag)
1203 {
1204 struct sas_task *task;
1205 struct hisi_sas_device *sas_dev = device->lldd_dev;
1206 struct device *dev = &hisi_hba->pdev->dev;
1207 int res;
1208 unsigned long flags;
1209
1210 if (!hisi_hba->hw->prep_abort)
1211 return -EOPNOTSUPP;
1212
1213 task = sas_alloc_slow_task(GFP_KERNEL);
1214 if (!task)
1215 return -ENOMEM;
1216
1217 task->dev = device;
1218 task->task_proto = device->tproto;
1219 task->task_done = hisi_sas_task_done;
1220 task->slow_task->timer.data = (unsigned long)task;
1221 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1222 task->slow_task->timer.expires = jiffies + 20*HZ;
1223 add_timer(&task->slow_task->timer);
1224
1225 /* Lock as we are alloc'ing a slot, which cannot be interrupted */
1226 spin_lock_irqsave(&hisi_hba->lock, flags);
1227 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1228 task, abort_flag, tag);
1229 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1230 if (res) {
1231 del_timer(&task->slow_task->timer);
1232 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1233 res);
1234 goto exit;
1235 }
1236 wait_for_completion(&task->slow_task->completion);
1237 res = TMF_RESP_FUNC_FAILED;
1238
1239 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1240 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1241 res = TMF_RESP_FUNC_COMPLETE;
1242 goto exit;
1243 }
1244
1245 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1246 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1247 res = TMF_RESP_FUNC_SUCC;
1248 goto exit;
1249 }
1250
1251 /* TMF timed out, return direct. */
1252 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1253 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1254 dev_err(dev, "internal task abort: timeout.\n");
1255 if (task->lldd_task) {
1256 struct hisi_sas_slot *slot = task->lldd_task;
1257
1258 hisi_sas_slot_task_free(hisi_hba, task, slot);
1259 }
1260 }
1261 }
1262
1263 exit:
1264 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1265 "resp: 0x%x sts 0x%x\n",
1266 SAS_ADDR(device->sas_addr),
1267 task,
1268 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1269 task->task_status.stat);
1270 sas_free_task(task);
1271
1272 return res;
1273 }
1274
1275 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1276 {
1277 hisi_sas_port_notify_formed(sas_phy);
1278 }
1279
1280 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1281 {
1282 phy->phy_attached = 0;
1283 phy->phy_type = 0;
1284 phy->port = NULL;
1285 }
1286
1287 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1288 {
1289 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1290 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1291 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1292
1293 if (rdy) {
1294 /* Phy down but ready */
1295 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1296 hisi_sas_port_notify_formed(sas_phy);
1297 } else {
1298 struct hisi_sas_port *port = phy->port;
1299
1300 /* Phy down and not ready */
1301 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1302 sas_phy_disconnected(sas_phy);
1303
1304 if (port) {
1305 if (phy->phy_type & PORT_TYPE_SAS) {
1306 int port_id = port->id;
1307
1308 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1309 port_id))
1310 port->port_attached = 0;
1311 } else if (phy->phy_type & PORT_TYPE_SATA)
1312 port->port_attached = 0;
1313 }
1314 hisi_sas_phy_disconnected(phy);
1315 }
1316 }
1317 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1318
1319 void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1320 u32 state)
1321 {
1322 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1323 int phy_no;
1324
1325 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1326 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1327 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1328 struct asd_sas_port *sas_port = sas_phy->port;
1329 struct domain_device *dev;
1330
1331 if (sas_phy->enabled) {
1332 /* Report PHY state change to libsas */
1333 if (state & (1 << phy_no))
1334 continue;
1335
1336 if (old_state & (1 << phy_no))
1337 /* PHY down but was up before */
1338 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1339 }
1340 if (!sas_port)
1341 continue;
1342 dev = sas_port->port_dev;
1343
1344 if (DEV_IS_EXPANDER(dev->dev_type))
1345 sas_ha->notify_phy_event(sas_phy, PORTE_BROADCAST_RCVD);
1346 }
1347 }
1348 EXPORT_SYMBOL_GPL(hisi_sas_rescan_topology);
1349
1350 static struct scsi_transport_template *hisi_sas_stt;
1351
1352 static struct scsi_host_template hisi_sas_sht = {
1353 .module = THIS_MODULE,
1354 .name = DRV_NAME,
1355 .queuecommand = sas_queuecommand,
1356 .target_alloc = sas_target_alloc,
1357 .slave_configure = hisi_sas_slave_configure,
1358 .scan_finished = hisi_sas_scan_finished,
1359 .scan_start = hisi_sas_scan_start,
1360 .change_queue_depth = sas_change_queue_depth,
1361 .bios_param = sas_bios_param,
1362 .can_queue = 1,
1363 .this_id = -1,
1364 .sg_tablesize = SG_ALL,
1365 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1366 .use_clustering = ENABLE_CLUSTERING,
1367 .eh_device_reset_handler = sas_eh_device_reset_handler,
1368 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1369 .target_destroy = sas_target_destroy,
1370 .ioctl = sas_ioctl,
1371 };
1372
1373 static struct sas_domain_function_template hisi_sas_transport_ops = {
1374 .lldd_dev_found = hisi_sas_dev_found,
1375 .lldd_dev_gone = hisi_sas_dev_gone,
1376 .lldd_execute_task = hisi_sas_queue_command,
1377 .lldd_control_phy = hisi_sas_control_phy,
1378 .lldd_abort_task = hisi_sas_abort_task,
1379 .lldd_abort_task_set = hisi_sas_abort_task_set,
1380 .lldd_clear_aca = hisi_sas_clear_aca,
1381 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1382 .lldd_lu_reset = hisi_sas_lu_reset,
1383 .lldd_query_task = hisi_sas_query_task,
1384 .lldd_port_formed = hisi_sas_port_formed,
1385 };
1386
1387 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1388 {
1389 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1390
1391 for (i = 0; i < hisi_hba->queue_count; i++) {
1392 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1393 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1394
1395 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1396 memset(hisi_hba->cmd_hdr[i], 0, s);
1397 dq->wr_point = 0;
1398
1399 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1400 memset(hisi_hba->complete_hdr[i], 0, s);
1401 cq->rd_point = 0;
1402 }
1403
1404 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1405 memset(hisi_hba->initial_fis, 0, s);
1406
1407 s = max_command_entries * sizeof(struct hisi_sas_iost);
1408 memset(hisi_hba->iost, 0, s);
1409
1410 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1411 memset(hisi_hba->breakpoint, 0, s);
1412
1413 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1414 memset(hisi_hba->sata_breakpoint, 0, s);
1415 }
1416 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1417
1418 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1419 {
1420 struct platform_device *pdev = hisi_hba->pdev;
1421 struct device *dev = &pdev->dev;
1422 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1423
1424 spin_lock_init(&hisi_hba->lock);
1425 for (i = 0; i < hisi_hba->n_phy; i++) {
1426 hisi_sas_phy_init(hisi_hba, i);
1427 hisi_hba->port[i].port_attached = 0;
1428 hisi_hba->port[i].id = -1;
1429 }
1430
1431 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1432 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1433 hisi_hba->devices[i].device_id = i;
1434 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1435 }
1436
1437 for (i = 0; i < hisi_hba->queue_count; i++) {
1438 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1439 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1440
1441 /* Completion queue structure */
1442 cq->id = i;
1443 cq->hisi_hba = hisi_hba;
1444
1445 /* Delivery queue structure */
1446 dq->id = i;
1447 dq->hisi_hba = hisi_hba;
1448
1449 /* Delivery queue */
1450 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1451 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1452 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1453 if (!hisi_hba->cmd_hdr[i])
1454 goto err_out;
1455
1456 /* Completion queue */
1457 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1458 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1459 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1460 if (!hisi_hba->complete_hdr[i])
1461 goto err_out;
1462 }
1463
1464 s = HISI_SAS_STATUS_BUF_SZ;
1465 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1466 dev, s, 16, 0);
1467 if (!hisi_hba->status_buffer_pool)
1468 goto err_out;
1469
1470 s = HISI_SAS_COMMAND_TABLE_SZ;
1471 hisi_hba->command_table_pool = dma_pool_create("command_table",
1472 dev, s, 16, 0);
1473 if (!hisi_hba->command_table_pool)
1474 goto err_out;
1475
1476 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1477 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1478 GFP_KERNEL);
1479 if (!hisi_hba->itct)
1480 goto err_out;
1481
1482 memset(hisi_hba->itct, 0, s);
1483
1484 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1485 sizeof(struct hisi_sas_slot),
1486 GFP_KERNEL);
1487 if (!hisi_hba->slot_info)
1488 goto err_out;
1489
1490 s = max_command_entries * sizeof(struct hisi_sas_iost);
1491 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1492 GFP_KERNEL);
1493 if (!hisi_hba->iost)
1494 goto err_out;
1495
1496 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1497 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1498 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1499 if (!hisi_hba->breakpoint)
1500 goto err_out;
1501
1502 hisi_hba->slot_index_count = max_command_entries;
1503 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1504 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1505 if (!hisi_hba->slot_index_tags)
1506 goto err_out;
1507
1508 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1509 sizeof(struct hisi_sas_sge_page), 16, 0);
1510 if (!hisi_hba->sge_page_pool)
1511 goto err_out;
1512
1513 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1514 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1515 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1516 if (!hisi_hba->initial_fis)
1517 goto err_out;
1518
1519 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1520 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1521 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1522 if (!hisi_hba->sata_breakpoint)
1523 goto err_out;
1524 hisi_sas_init_mem(hisi_hba);
1525
1526 hisi_sas_slot_index_init(hisi_hba);
1527
1528 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1529 if (!hisi_hba->wq) {
1530 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1531 goto err_out;
1532 }
1533
1534 return 0;
1535 err_out:
1536 return -ENOMEM;
1537 }
1538
1539 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1540 {
1541 struct device *dev = &hisi_hba->pdev->dev;
1542 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1543
1544 for (i = 0; i < hisi_hba->queue_count; i++) {
1545 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1546 if (hisi_hba->cmd_hdr[i])
1547 dma_free_coherent(dev, s,
1548 hisi_hba->cmd_hdr[i],
1549 hisi_hba->cmd_hdr_dma[i]);
1550
1551 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1552 if (hisi_hba->complete_hdr[i])
1553 dma_free_coherent(dev, s,
1554 hisi_hba->complete_hdr[i],
1555 hisi_hba->complete_hdr_dma[i]);
1556 }
1557
1558 dma_pool_destroy(hisi_hba->status_buffer_pool);
1559 dma_pool_destroy(hisi_hba->command_table_pool);
1560 dma_pool_destroy(hisi_hba->sge_page_pool);
1561
1562 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1563 if (hisi_hba->itct)
1564 dma_free_coherent(dev, s,
1565 hisi_hba->itct, hisi_hba->itct_dma);
1566
1567 s = max_command_entries * sizeof(struct hisi_sas_iost);
1568 if (hisi_hba->iost)
1569 dma_free_coherent(dev, s,
1570 hisi_hba->iost, hisi_hba->iost_dma);
1571
1572 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1573 if (hisi_hba->breakpoint)
1574 dma_free_coherent(dev, s,
1575 hisi_hba->breakpoint,
1576 hisi_hba->breakpoint_dma);
1577
1578
1579 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1580 if (hisi_hba->initial_fis)
1581 dma_free_coherent(dev, s,
1582 hisi_hba->initial_fis,
1583 hisi_hba->initial_fis_dma);
1584
1585 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1586 if (hisi_hba->sata_breakpoint)
1587 dma_free_coherent(dev, s,
1588 hisi_hba->sata_breakpoint,
1589 hisi_hba->sata_breakpoint_dma);
1590
1591 if (hisi_hba->wq)
1592 destroy_workqueue(hisi_hba->wq);
1593 }
1594
1595 static void hisi_sas_rst_work_handler(struct work_struct *work)
1596 {
1597 struct hisi_hba *hisi_hba =
1598 container_of(work, struct hisi_hba, rst_work);
1599
1600 hisi_sas_controller_reset(hisi_hba);
1601 }
1602
1603 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1604 const struct hisi_sas_hw *hw)
1605 {
1606 struct resource *res;
1607 struct Scsi_Host *shost;
1608 struct hisi_hba *hisi_hba;
1609 struct device *dev = &pdev->dev;
1610 struct device_node *np = pdev->dev.of_node;
1611 struct clk *refclk;
1612
1613 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1614 if (!shost) {
1615 dev_err(dev, "scsi host alloc failed\n");
1616 return NULL;
1617 }
1618 hisi_hba = shost_priv(shost);
1619
1620 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1621 hisi_hba->hw = hw;
1622 hisi_hba->pdev = pdev;
1623 hisi_hba->shost = shost;
1624 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1625
1626 init_timer(&hisi_hba->timer);
1627
1628 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1629 SAS_ADDR_SIZE))
1630 goto err_out;
1631
1632 if (np) {
1633 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1634 "hisilicon,sas-syscon");
1635 if (IS_ERR(hisi_hba->ctrl))
1636 goto err_out;
1637
1638 if (device_property_read_u32(dev, "ctrl-reset-reg",
1639 &hisi_hba->ctrl_reset_reg))
1640 goto err_out;
1641
1642 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1643 &hisi_hba->ctrl_reset_sts_reg))
1644 goto err_out;
1645
1646 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1647 &hisi_hba->ctrl_clock_ena_reg))
1648 goto err_out;
1649 }
1650
1651 refclk = devm_clk_get(&pdev->dev, NULL);
1652 if (IS_ERR(refclk))
1653 dev_dbg(dev, "no ref clk property\n");
1654 else
1655 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1656
1657 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1658 goto err_out;
1659
1660 if (device_property_read_u32(dev, "queue-count",
1661 &hisi_hba->queue_count))
1662 goto err_out;
1663
1664 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1665 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1666 dev_err(dev, "No usable DMA addressing method\n");
1667 goto err_out;
1668 }
1669
1670 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1671 hisi_hba->regs = devm_ioremap_resource(dev, res);
1672 if (IS_ERR(hisi_hba->regs))
1673 goto err_out;
1674
1675 if (hisi_sas_alloc(hisi_hba, shost)) {
1676 hisi_sas_free(hisi_hba);
1677 goto err_out;
1678 }
1679
1680 return shost;
1681 err_out:
1682 kfree(shost);
1683 dev_err(dev, "shost alloc failed\n");
1684 return NULL;
1685 }
1686
1687 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1688 {
1689 int i;
1690
1691 for (i = 0; i < hisi_hba->n_phy; i++)
1692 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1693 hisi_hba->sas_addr,
1694 SAS_ADDR_SIZE);
1695 }
1696
1697 int hisi_sas_probe(struct platform_device *pdev,
1698 const struct hisi_sas_hw *hw)
1699 {
1700 struct Scsi_Host *shost;
1701 struct hisi_hba *hisi_hba;
1702 struct device *dev = &pdev->dev;
1703 struct asd_sas_phy **arr_phy;
1704 struct asd_sas_port **arr_port;
1705 struct sas_ha_struct *sha;
1706 int rc, phy_nr, port_nr, i;
1707
1708 shost = hisi_sas_shost_alloc(pdev, hw);
1709 if (!shost)
1710 return -ENOMEM;
1711
1712 sha = SHOST_TO_SAS_HA(shost);
1713 hisi_hba = shost_priv(shost);
1714 platform_set_drvdata(pdev, sha);
1715
1716 phy_nr = port_nr = hisi_hba->n_phy;
1717
1718 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1719 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1720 if (!arr_phy || !arr_port) {
1721 rc = -ENOMEM;
1722 goto err_out_ha;
1723 }
1724
1725 sha->sas_phy = arr_phy;
1726 sha->sas_port = arr_port;
1727 sha->lldd_ha = hisi_hba;
1728
1729 shost->transportt = hisi_sas_stt;
1730 shost->max_id = HISI_SAS_MAX_DEVICES;
1731 shost->max_lun = ~0;
1732 shost->max_channel = 1;
1733 shost->max_cmd_len = 16;
1734 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1735 shost->can_queue = hisi_hba->hw->max_command_entries;
1736 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1737
1738 sha->sas_ha_name = DRV_NAME;
1739 sha->dev = &hisi_hba->pdev->dev;
1740 sha->lldd_module = THIS_MODULE;
1741 sha->sas_addr = &hisi_hba->sas_addr[0];
1742 sha->num_phys = hisi_hba->n_phy;
1743 sha->core.shost = hisi_hba->shost;
1744
1745 for (i = 0; i < hisi_hba->n_phy; i++) {
1746 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1747 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1748 }
1749
1750 hisi_sas_init_add(hisi_hba);
1751
1752 rc = scsi_add_host(shost, &pdev->dev);
1753 if (rc)
1754 goto err_out_ha;
1755
1756 rc = sas_register_ha(sha);
1757 if (rc)
1758 goto err_out_register_ha;
1759
1760 rc = hisi_hba->hw->hw_init(hisi_hba);
1761 if (rc)
1762 goto err_out_register_ha;
1763
1764 scsi_scan_host(shost);
1765
1766 return 0;
1767
1768 err_out_register_ha:
1769 scsi_remove_host(shost);
1770 err_out_ha:
1771 hisi_sas_free(hisi_hba);
1772 kfree(shost);
1773 return rc;
1774 }
1775 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1776
1777 int hisi_sas_remove(struct platform_device *pdev)
1778 {
1779 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1780 struct hisi_hba *hisi_hba = sha->lldd_ha;
1781 struct Scsi_Host *shost = sha->core.shost;
1782
1783 scsi_remove_host(sha->core.shost);
1784 sas_unregister_ha(sha);
1785 sas_remove_host(sha->core.shost);
1786
1787 hisi_sas_free(hisi_hba);
1788 kfree(shost);
1789 return 0;
1790 }
1791 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1792
1793 static __init int hisi_sas_init(void)
1794 {
1795 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1796
1797 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1798 if (!hisi_sas_stt)
1799 return -ENOMEM;
1800
1801 return 0;
1802 }
1803
1804 static __exit void hisi_sas_exit(void)
1805 {
1806 sas_release_transport(hisi_sas_stt);
1807 }
1808
1809 module_init(hisi_sas_init);
1810 module_exit(hisi_sas_exit);
1811
1812 MODULE_VERSION(DRV_VERSION);
1813 MODULE_LICENSE("GPL");
1814 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1815 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1816 MODULE_ALIAS("platform:" DRV_NAME);
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