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scsi: hisi_sas: fix timeout check in hisi_sas_internal_task_abort()
[mirror_ubuntu-bionic-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
81 if (task) {
82 struct device *dev = &hisi_hba->pdev->dev;
83 struct domain_device *device = task->dev;
84 struct hisi_sas_device *sas_dev = device->lldd_dev;
85
86 if (!sas_protocol_ata(task->task_proto))
87 if (slot->n_elem)
88 dma_unmap_sg(dev, task->scatter, slot->n_elem,
89 task->data_dir);
90
91 task->lldd_task = NULL;
92
93 if (sas_dev)
94 atomic64_dec(&sas_dev->running_req);
95 }
96
97 if (slot->command_table)
98 dma_pool_free(hisi_hba->command_table_pool,
99 slot->command_table, slot->command_table_dma);
100
101 if (slot->status_buffer)
102 dma_pool_free(hisi_hba->status_buffer_pool,
103 slot->status_buffer, slot->status_buffer_dma);
104
105 if (slot->sge_page)
106 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
107 slot->sge_page_dma);
108
109 list_del_init(&slot->entry);
110 slot->task = NULL;
111 slot->port = NULL;
112 hisi_sas_slot_index_free(hisi_hba, slot->idx);
113
114 /* slot memory is fully zeroed when it is reused */
115 }
116 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
117
118 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
119 struct hisi_sas_slot *slot)
120 {
121 return hisi_hba->hw->prep_smp(hisi_hba, slot);
122 }
123
124 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
125 struct hisi_sas_slot *slot, int is_tmf,
126 struct hisi_sas_tmf_task *tmf)
127 {
128 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
129 }
130
131 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
132 struct hisi_sas_slot *slot)
133 {
134 return hisi_hba->hw->prep_stp(hisi_hba, slot);
135 }
136
137 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
138 struct hisi_sas_slot *slot,
139 int device_id, int abort_flag, int tag_to_abort)
140 {
141 return hisi_hba->hw->prep_abort(hisi_hba, slot,
142 device_id, abort_flag, tag_to_abort);
143 }
144
145 /*
146 * This function will issue an abort TMF regardless of whether the
147 * task is in the sdev or not. Then it will do the task complete
148 * cleanup and callbacks.
149 */
150 static void hisi_sas_slot_abort(struct work_struct *work)
151 {
152 struct hisi_sas_slot *abort_slot =
153 container_of(work, struct hisi_sas_slot, abort_slot);
154 struct sas_task *task = abort_slot->task;
155 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
156 struct scsi_cmnd *cmnd = task->uldd_task;
157 struct hisi_sas_tmf_task tmf_task;
158 struct scsi_lun lun;
159 struct device *dev = &hisi_hba->pdev->dev;
160 int tag = abort_slot->idx;
161 unsigned long flags;
162
163 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
164 dev_err(dev, "cannot abort slot for non-ssp task\n");
165 goto out;
166 }
167
168 int_to_scsilun(cmnd->device->lun, &lun);
169 tmf_task.tmf = TMF_ABORT_TASK;
170 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
171
172 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
173 out:
174 /* Do cleanup for this task */
175 spin_lock_irqsave(&hisi_hba->lock, flags);
176 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
177 spin_unlock_irqrestore(&hisi_hba->lock, flags);
178 if (task->task_done)
179 task->task_done(task);
180 }
181
182 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
183 int is_tmf, struct hisi_sas_tmf_task *tmf,
184 int *pass)
185 {
186 struct domain_device *device = task->dev;
187 struct hisi_sas_device *sas_dev = device->lldd_dev;
188 struct hisi_sas_port *port;
189 struct hisi_sas_slot *slot;
190 struct hisi_sas_cmd_hdr *cmd_hdr_base;
191 struct asd_sas_port *sas_port = device->port;
192 struct device *dev = &hisi_hba->pdev->dev;
193 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
194 unsigned long flags;
195
196 if (!sas_port) {
197 struct task_status_struct *ts = &task->task_status;
198
199 ts->resp = SAS_TASK_UNDELIVERED;
200 ts->stat = SAS_PHY_DOWN;
201 /*
202 * libsas will use dev->port, should
203 * not call task_done for sata
204 */
205 if (device->dev_type != SAS_SATA_DEV)
206 task->task_done(task);
207 return SAS_PHY_DOWN;
208 }
209
210 if (DEV_IS_GONE(sas_dev)) {
211 if (sas_dev)
212 dev_info(dev, "task prep: device %llu not ready\n",
213 sas_dev->device_id);
214 else
215 dev_info(dev, "task prep: device %016llx not ready\n",
216 SAS_ADDR(device->sas_addr));
217
218 return SAS_PHY_DOWN;
219 }
220
221 port = to_hisi_sas_port(sas_port);
222 if (port && !port->port_attached) {
223 dev_info(dev, "task prep: %s port%d not attach device\n",
224 (dev_is_sata(device)) ?
225 "SATA/STP" : "SAS",
226 device->port->id);
227
228 return SAS_PHY_DOWN;
229 }
230
231 if (!sas_protocol_ata(task->task_proto)) {
232 if (task->num_scatter) {
233 n_elem = dma_map_sg(dev, task->scatter,
234 task->num_scatter, task->data_dir);
235 if (!n_elem) {
236 rc = -ENOMEM;
237 goto prep_out;
238 }
239 }
240 } else
241 n_elem = task->num_scatter;
242
243 if (hisi_hba->hw->slot_index_alloc)
244 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
245 device);
246 else
247 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
248 if (rc)
249 goto err_out;
250 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
251 &dlvry_queue, &dlvry_queue_slot);
252 if (rc)
253 goto err_out_tag;
254
255 slot = &hisi_hba->slot_info[slot_idx];
256 memset(slot, 0, sizeof(struct hisi_sas_slot));
257
258 slot->idx = slot_idx;
259 slot->n_elem = n_elem;
260 slot->dlvry_queue = dlvry_queue;
261 slot->dlvry_queue_slot = dlvry_queue_slot;
262 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
263 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
264 slot->task = task;
265 slot->port = port;
266 task->lldd_task = slot;
267 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
268
269 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
270 GFP_ATOMIC,
271 &slot->status_buffer_dma);
272 if (!slot->status_buffer) {
273 rc = -ENOMEM;
274 goto err_out_slot_buf;
275 }
276 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
277
278 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
279 GFP_ATOMIC,
280 &slot->command_table_dma);
281 if (!slot->command_table) {
282 rc = -ENOMEM;
283 goto err_out_status_buf;
284 }
285 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
286 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
287
288 switch (task->task_proto) {
289 case SAS_PROTOCOL_SMP:
290 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
291 break;
292 case SAS_PROTOCOL_SSP:
293 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
294 break;
295 case SAS_PROTOCOL_SATA:
296 case SAS_PROTOCOL_STP:
297 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
298 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
299 break;
300 default:
301 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
302 task->task_proto);
303 rc = -EINVAL;
304 break;
305 }
306
307 if (rc) {
308 dev_err(dev, "task prep: rc = 0x%x\n", rc);
309 if (slot->sge_page)
310 goto err_out_sge;
311 goto err_out_command_table;
312 }
313
314 list_add_tail(&slot->entry, &sas_dev->list);
315 spin_lock_irqsave(&task->task_state_lock, flags);
316 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
317 spin_unlock_irqrestore(&task->task_state_lock, flags);
318
319 hisi_hba->slot_prep = slot;
320
321 atomic64_inc(&sas_dev->running_req);
322 ++(*pass);
323
324 return 0;
325
326 err_out_sge:
327 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
328 slot->sge_page_dma);
329 err_out_command_table:
330 dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
331 slot->command_table_dma);
332 err_out_status_buf:
333 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
334 slot->status_buffer_dma);
335 err_out_slot_buf:
336 /* Nothing to be done */
337 err_out_tag:
338 hisi_sas_slot_index_free(hisi_hba, slot_idx);
339 err_out:
340 dev_err(dev, "task prep: failed[%d]!\n", rc);
341 if (!sas_protocol_ata(task->task_proto))
342 if (n_elem)
343 dma_unmap_sg(dev, task->scatter, n_elem,
344 task->data_dir);
345 prep_out:
346 return rc;
347 }
348
349 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
350 int is_tmf, struct hisi_sas_tmf_task *tmf)
351 {
352 u32 rc;
353 u32 pass = 0;
354 unsigned long flags;
355 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
356 struct device *dev = &hisi_hba->pdev->dev;
357
358 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
359 return -EINVAL;
360
361 /* protect task_prep and start_delivery sequence */
362 spin_lock_irqsave(&hisi_hba->lock, flags);
363 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
364 if (rc)
365 dev_err(dev, "task exec: failed[%d]!\n", rc);
366
367 if (likely(pass))
368 hisi_hba->hw->start_delivery(hisi_hba);
369 spin_unlock_irqrestore(&hisi_hba->lock, flags);
370
371 return rc;
372 }
373
374 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
375 {
376 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
377 struct asd_sas_phy *sas_phy = &phy->sas_phy;
378 struct sas_ha_struct *sas_ha;
379
380 if (!phy->phy_attached)
381 return;
382
383 sas_ha = &hisi_hba->sha;
384 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
385
386 if (sas_phy->phy) {
387 struct sas_phy *sphy = sas_phy->phy;
388
389 sphy->negotiated_linkrate = sas_phy->linkrate;
390 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
391 sphy->maximum_linkrate_hw =
392 hisi_hba->hw->phy_get_max_linkrate();
393 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
394 sphy->minimum_linkrate = phy->minimum_linkrate;
395
396 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
397 sphy->maximum_linkrate = phy->maximum_linkrate;
398 }
399
400 if (phy->phy_type & PORT_TYPE_SAS) {
401 struct sas_identify_frame *id;
402
403 id = (struct sas_identify_frame *)phy->frame_rcvd;
404 id->dev_type = phy->identify.device_type;
405 id->initiator_bits = SAS_PROTOCOL_ALL;
406 id->target_bits = phy->identify.target_port_protocols;
407 } else if (phy->phy_type & PORT_TYPE_SATA) {
408 /*Nothing*/
409 }
410
411 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
412 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
413 }
414
415 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
416 {
417 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
418 struct hisi_sas_device *sas_dev = NULL;
419 int i;
420
421 spin_lock(&hisi_hba->lock);
422 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
423 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
424 hisi_hba->devices[i].device_id = i;
425 sas_dev = &hisi_hba->devices[i];
426 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
427 sas_dev->dev_type = device->dev_type;
428 sas_dev->hisi_hba = hisi_hba;
429 sas_dev->sas_device = device;
430 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
431 break;
432 }
433 }
434 spin_unlock(&hisi_hba->lock);
435
436 return sas_dev;
437 }
438
439 static int hisi_sas_dev_found(struct domain_device *device)
440 {
441 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
442 struct domain_device *parent_dev = device->parent;
443 struct hisi_sas_device *sas_dev;
444 struct device *dev = &hisi_hba->pdev->dev;
445
446 if (hisi_hba->hw->alloc_dev)
447 sas_dev = hisi_hba->hw->alloc_dev(device);
448 else
449 sas_dev = hisi_sas_alloc_dev(device);
450 if (!sas_dev) {
451 dev_err(dev, "fail alloc dev: max support %d devices\n",
452 HISI_SAS_MAX_DEVICES);
453 return -EINVAL;
454 }
455
456 device->lldd_dev = sas_dev;
457 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
458
459 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
460 int phy_no;
461 u8 phy_num = parent_dev->ex_dev.num_phys;
462 struct ex_phy *phy;
463
464 for (phy_no = 0; phy_no < phy_num; phy_no++) {
465 phy = &parent_dev->ex_dev.ex_phy[phy_no];
466 if (SAS_ADDR(phy->attached_sas_addr) ==
467 SAS_ADDR(device->sas_addr)) {
468 sas_dev->attached_phy = phy_no;
469 break;
470 }
471 }
472
473 if (phy_no == phy_num) {
474 dev_info(dev, "dev found: no attached "
475 "dev:%016llx at ex:%016llx\n",
476 SAS_ADDR(device->sas_addr),
477 SAS_ADDR(parent_dev->sas_addr));
478 return -EINVAL;
479 }
480 }
481
482 return 0;
483 }
484
485 static int hisi_sas_slave_configure(struct scsi_device *sdev)
486 {
487 struct domain_device *dev = sdev_to_domain_dev(sdev);
488 int ret = sas_slave_configure(sdev);
489
490 if (ret)
491 return ret;
492 if (!dev_is_sata(dev))
493 sas_change_queue_depth(sdev, 64);
494
495 return 0;
496 }
497
498 static void hisi_sas_scan_start(struct Scsi_Host *shost)
499 {
500 struct hisi_hba *hisi_hba = shost_priv(shost);
501
502 hisi_hba->hw->phys_init(hisi_hba);
503 }
504
505 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
506 {
507 struct hisi_hba *hisi_hba = shost_priv(shost);
508 struct sas_ha_struct *sha = &hisi_hba->sha;
509
510 /* Wait for PHY up interrupt to occur */
511 if (time < HZ)
512 return 0;
513
514 sas_drain_work(sha);
515 return 1;
516 }
517
518 static void hisi_sas_phyup_work(struct work_struct *work)
519 {
520 struct hisi_sas_phy *phy =
521 container_of(work, struct hisi_sas_phy, phyup_ws);
522 struct hisi_hba *hisi_hba = phy->hisi_hba;
523 struct asd_sas_phy *sas_phy = &phy->sas_phy;
524 int phy_no = sas_phy->id;
525
526 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
527 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
528 }
529
530 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
531 {
532 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
533 struct asd_sas_phy *sas_phy = &phy->sas_phy;
534
535 phy->hisi_hba = hisi_hba;
536 phy->port = NULL;
537 init_timer(&phy->timer);
538 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
539 sas_phy->class = SAS;
540 sas_phy->iproto = SAS_PROTOCOL_ALL;
541 sas_phy->tproto = 0;
542 sas_phy->type = PHY_TYPE_PHYSICAL;
543 sas_phy->role = PHY_ROLE_INITIATOR;
544 sas_phy->oob_mode = OOB_NOT_CONNECTED;
545 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
546 sas_phy->id = phy_no;
547 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
548 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
549 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
550 sas_phy->lldd_phy = phy;
551
552 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
553 }
554
555 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
556 {
557 struct sas_ha_struct *sas_ha = sas_phy->ha;
558 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
559 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
560 struct asd_sas_port *sas_port = sas_phy->port;
561 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
562 unsigned long flags;
563
564 if (!sas_port)
565 return;
566
567 spin_lock_irqsave(&hisi_hba->lock, flags);
568 port->port_attached = 1;
569 port->id = phy->port_id;
570 phy->port = port;
571 sas_port->lldd_port = port;
572 spin_unlock_irqrestore(&hisi_hba->lock, flags);
573 }
574
575 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
576 struct hisi_sas_slot *slot)
577 {
578 if (task) {
579 unsigned long flags;
580 struct task_status_struct *ts;
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
593 hisi_sas_slot_task_free(hisi_hba, task, slot);
594 }
595
596 /* hisi_hba.lock should be locked */
597 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
598 struct domain_device *device)
599 {
600 struct hisi_sas_slot *slot, *slot2;
601 struct hisi_sas_device *sas_dev = device->lldd_dev;
602
603 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
604 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
605 }
606
607 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
608 {
609 struct hisi_sas_device *sas_dev;
610 struct domain_device *device;
611 int i;
612
613 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
614 sas_dev = &hisi_hba->devices[i];
615 device = sas_dev->sas_device;
616
617 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
618 !device)
619 continue;
620
621 hisi_sas_release_task(hisi_hba, device);
622 }
623 }
624
625 static void hisi_sas_dev_gone(struct domain_device *device)
626 {
627 struct hisi_sas_device *sas_dev = device->lldd_dev;
628 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
629 struct device *dev = &hisi_hba->pdev->dev;
630 u64 dev_id = sas_dev->device_id;
631
632 dev_info(dev, "found dev[%lld:%x] is gone\n",
633 sas_dev->device_id, sas_dev->dev_type);
634
635 hisi_sas_internal_task_abort(hisi_hba, device,
636 HISI_SAS_INT_ABT_DEV, 0);
637
638 hisi_hba->hw->free_device(hisi_hba, sas_dev);
639 device->lldd_dev = NULL;
640 memset(sas_dev, 0, sizeof(*sas_dev));
641 sas_dev->device_id = dev_id;
642 sas_dev->dev_type = SAS_PHY_UNUSED;
643 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
644 }
645
646 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
647 {
648 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
649 }
650
651 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
652 void *funcdata)
653 {
654 struct sas_ha_struct *sas_ha = sas_phy->ha;
655 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
656 int phy_no = sas_phy->id;
657
658 switch (func) {
659 case PHY_FUNC_HARD_RESET:
660 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
661 break;
662
663 case PHY_FUNC_LINK_RESET:
664 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
665 msleep(100);
666 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
667 break;
668
669 case PHY_FUNC_DISABLE:
670 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
671 break;
672
673 case PHY_FUNC_SET_LINK_RATE:
674 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
675 break;
676
677 case PHY_FUNC_RELEASE_SPINUP_HOLD:
678 default:
679 return -EOPNOTSUPP;
680 }
681 return 0;
682 }
683
684 static void hisi_sas_task_done(struct sas_task *task)
685 {
686 if (!del_timer(&task->slow_task->timer))
687 return;
688 complete(&task->slow_task->completion);
689 }
690
691 static void hisi_sas_tmf_timedout(unsigned long data)
692 {
693 struct sas_task *task = (struct sas_task *)data;
694 unsigned long flags;
695
696 spin_lock_irqsave(&task->task_state_lock, flags);
697 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
698 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
699 spin_unlock_irqrestore(&task->task_state_lock, flags);
700
701 complete(&task->slow_task->completion);
702 }
703
704 #define TASK_TIMEOUT 20
705 #define TASK_RETRY 3
706 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
707 void *parameter, u32 para_len,
708 struct hisi_sas_tmf_task *tmf)
709 {
710 struct hisi_sas_device *sas_dev = device->lldd_dev;
711 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
712 struct device *dev = &hisi_hba->pdev->dev;
713 struct sas_task *task;
714 int res, retry;
715
716 for (retry = 0; retry < TASK_RETRY; retry++) {
717 task = sas_alloc_slow_task(GFP_KERNEL);
718 if (!task)
719 return -ENOMEM;
720
721 task->dev = device;
722 task->task_proto = device->tproto;
723
724 if (dev_is_sata(device)) {
725 task->ata_task.device_control_reg_update = 1;
726 memcpy(&task->ata_task.fis, parameter, para_len);
727 } else {
728 memcpy(&task->ssp_task, parameter, para_len);
729 }
730 task->task_done = hisi_sas_task_done;
731
732 task->slow_task->timer.data = (unsigned long) task;
733 task->slow_task->timer.function = hisi_sas_tmf_timedout;
734 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
735 add_timer(&task->slow_task->timer);
736
737 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
738
739 if (res) {
740 del_timer(&task->slow_task->timer);
741 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
742 res);
743 goto ex_err;
744 }
745
746 wait_for_completion(&task->slow_task->completion);
747 res = TMF_RESP_FUNC_FAILED;
748 /* Even TMF timed out, return direct. */
749 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
750 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
751 struct hisi_sas_slot *slot = task->lldd_task;
752
753 dev_err(dev, "abort tmf: TMF task timeout\n");
754 if (slot)
755 slot->task = NULL;
756
757 goto ex_err;
758 }
759 }
760
761 if (task->task_status.resp == SAS_TASK_COMPLETE &&
762 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
763 res = TMF_RESP_FUNC_COMPLETE;
764 break;
765 }
766
767 if (task->task_status.resp == SAS_TASK_COMPLETE &&
768 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
769 res = TMF_RESP_FUNC_SUCC;
770 break;
771 }
772
773 if (task->task_status.resp == SAS_TASK_COMPLETE &&
774 task->task_status.stat == SAS_DATA_UNDERRUN) {
775 /* no error, but return the number of bytes of
776 * underrun
777 */
778 dev_warn(dev, "abort tmf: task to dev %016llx "
779 "resp: 0x%x sts 0x%x underrun\n",
780 SAS_ADDR(device->sas_addr),
781 task->task_status.resp,
782 task->task_status.stat);
783 res = task->task_status.residual;
784 break;
785 }
786
787 if (task->task_status.resp == SAS_TASK_COMPLETE &&
788 task->task_status.stat == SAS_DATA_OVERRUN) {
789 dev_warn(dev, "abort tmf: blocked task error\n");
790 res = -EMSGSIZE;
791 break;
792 }
793
794 dev_warn(dev, "abort tmf: task to dev "
795 "%016llx resp: 0x%x status 0x%x\n",
796 SAS_ADDR(device->sas_addr), task->task_status.resp,
797 task->task_status.stat);
798 sas_free_task(task);
799 task = NULL;
800 }
801 ex_err:
802 if (retry == TASK_RETRY)
803 dev_warn(dev, "abort tmf: executing internal task failed!\n");
804 sas_free_task(task);
805 return res;
806 }
807
808 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
809 bool reset, int pmp, u8 *fis)
810 {
811 struct ata_taskfile tf;
812
813 ata_tf_init(dev, &tf);
814 if (reset)
815 tf.ctl |= ATA_SRST;
816 else
817 tf.ctl &= ~ATA_SRST;
818 tf.command = ATA_CMD_DEV_RESET;
819 ata_tf_to_fis(&tf, pmp, 0, fis);
820 }
821
822 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
823 {
824 u8 fis[20] = {0};
825 struct ata_port *ap = device->sata_dev.ap;
826 struct ata_link *link;
827 int rc = TMF_RESP_FUNC_FAILED;
828 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
829 struct device *dev = &hisi_hba->pdev->dev;
830 int s = sizeof(struct host_to_dev_fis);
831 unsigned long flags;
832
833 ata_for_each_link(link, ap, EDGE) {
834 int pmp = sata_srst_pmp(link);
835
836 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
837 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
838 if (rc != TMF_RESP_FUNC_COMPLETE)
839 break;
840 }
841
842 if (rc == TMF_RESP_FUNC_COMPLETE) {
843 ata_for_each_link(link, ap, EDGE) {
844 int pmp = sata_srst_pmp(link);
845
846 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
847 rc = hisi_sas_exec_internal_tmf_task(device, fis,
848 s, NULL);
849 if (rc != TMF_RESP_FUNC_COMPLETE)
850 dev_err(dev, "ata disk de-reset failed\n");
851 }
852 } else {
853 dev_err(dev, "ata disk reset failed\n");
854 }
855
856 if (rc == TMF_RESP_FUNC_COMPLETE) {
857 spin_lock_irqsave(&hisi_hba->lock, flags);
858 hisi_sas_release_task(hisi_hba, device);
859 spin_unlock_irqrestore(&hisi_hba->lock, flags);
860 }
861
862 return rc;
863 }
864
865 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
866 u8 *lun, struct hisi_sas_tmf_task *tmf)
867 {
868 struct sas_ssp_task ssp_task;
869
870 if (!(device->tproto & SAS_PROTOCOL_SSP))
871 return TMF_RESP_FUNC_ESUPP;
872
873 memcpy(ssp_task.LUN, lun, 8);
874
875 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
876 sizeof(ssp_task), tmf);
877 }
878
879 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
880 {
881 int rc;
882
883 if (!hisi_hba->hw->soft_reset)
884 return -1;
885
886 if (!test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
887 struct device *dev = &hisi_hba->pdev->dev;
888 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
889 unsigned long flags;
890
891 dev_dbg(dev, "controller reset begins!\n");
892 scsi_block_requests(hisi_hba->shost);
893 rc = hisi_hba->hw->soft_reset(hisi_hba);
894 if (rc) {
895 dev_warn(dev, "controller reset failed (%d)\n", rc);
896 goto out;
897 }
898 spin_lock_irqsave(&hisi_hba->lock, flags);
899 hisi_sas_release_tasks(hisi_hba);
900 spin_unlock_irqrestore(&hisi_hba->lock, flags);
901
902 sas_ha->notify_ha_event(sas_ha, HAE_RESET);
903 dev_dbg(dev, "controller reset successful!\n");
904 } else
905 return -1;
906
907 out:
908 scsi_unblock_requests(hisi_hba->shost);
909 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
910 return rc;
911 }
912
913 static int hisi_sas_abort_task(struct sas_task *task)
914 {
915 struct scsi_lun lun;
916 struct hisi_sas_tmf_task tmf_task;
917 struct domain_device *device = task->dev;
918 struct hisi_sas_device *sas_dev = device->lldd_dev;
919 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
920 struct device *dev = &hisi_hba->pdev->dev;
921 int rc = TMF_RESP_FUNC_FAILED;
922 unsigned long flags;
923
924 if (!sas_dev) {
925 dev_warn(dev, "Device has been removed\n");
926 return TMF_RESP_FUNC_FAILED;
927 }
928
929 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
930 rc = TMF_RESP_FUNC_COMPLETE;
931 goto out;
932 }
933
934 sas_dev->dev_status = HISI_SAS_DEV_EH;
935 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
936 struct scsi_cmnd *cmnd = task->uldd_task;
937 struct hisi_sas_slot *slot = task->lldd_task;
938 u32 tag = slot->idx;
939 int rc2;
940
941 int_to_scsilun(cmnd->device->lun, &lun);
942 tmf_task.tmf = TMF_ABORT_TASK;
943 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
944
945 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
946 &tmf_task);
947
948 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
949 HISI_SAS_INT_ABT_CMD, tag);
950 /*
951 * If the TMF finds that the IO is not in the device and also
952 * the internal abort does not succeed, then it is safe to
953 * free the slot.
954 * Note: if the internal abort succeeds then the slot
955 * will have already been completed
956 */
957 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
958 if (task->lldd_task) {
959 spin_lock_irqsave(&hisi_hba->lock, flags);
960 hisi_sas_do_release_task(hisi_hba, task, slot);
961 spin_unlock_irqrestore(&hisi_hba->lock, flags);
962 }
963 }
964 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
965 task->task_proto & SAS_PROTOCOL_STP) {
966 if (task->dev->dev_type == SAS_SATA_DEV) {
967 hisi_sas_internal_task_abort(hisi_hba, device,
968 HISI_SAS_INT_ABT_DEV, 0);
969 rc = hisi_sas_softreset_ata_disk(device);
970 }
971 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
972 /* SMP */
973 struct hisi_sas_slot *slot = task->lldd_task;
974 u32 tag = slot->idx;
975
976 rc = hisi_sas_internal_task_abort(hisi_hba, device,
977 HISI_SAS_INT_ABT_CMD, tag);
978 if (rc == TMF_RESP_FUNC_FAILED) {
979 spin_lock_irqsave(&hisi_hba->lock, flags);
980 hisi_sas_do_release_task(hisi_hba, task, slot);
981 spin_unlock_irqrestore(&hisi_hba->lock, flags);
982 }
983 }
984
985 out:
986 if (rc != TMF_RESP_FUNC_COMPLETE)
987 dev_notice(dev, "abort task: rc=%d\n", rc);
988 return rc;
989 }
990
991 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
992 {
993 struct hisi_sas_tmf_task tmf_task;
994 int rc = TMF_RESP_FUNC_FAILED;
995
996 tmf_task.tmf = TMF_ABORT_TASK_SET;
997 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
998
999 return rc;
1000 }
1001
1002 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1003 {
1004 int rc = TMF_RESP_FUNC_FAILED;
1005 struct hisi_sas_tmf_task tmf_task;
1006
1007 tmf_task.tmf = TMF_CLEAR_ACA;
1008 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1009
1010 return rc;
1011 }
1012
1013 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1014 {
1015 struct sas_phy *phy = sas_get_local_phy(device);
1016 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1017 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1018 rc = sas_phy_reset(phy, reset_type);
1019 sas_put_local_phy(phy);
1020 msleep(2000);
1021 return rc;
1022 }
1023
1024 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1025 {
1026 struct hisi_sas_device *sas_dev = device->lldd_dev;
1027 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1028 unsigned long flags;
1029 int rc = TMF_RESP_FUNC_FAILED;
1030
1031 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1032 return TMF_RESP_FUNC_FAILED;
1033 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1034
1035 rc = hisi_sas_debug_I_T_nexus_reset(device);
1036
1037 if (rc == TMF_RESP_FUNC_COMPLETE) {
1038 spin_lock_irqsave(&hisi_hba->lock, flags);
1039 hisi_sas_release_task(hisi_hba, device);
1040 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1041 }
1042 return rc;
1043 }
1044
1045 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1046 {
1047 struct hisi_sas_device *sas_dev = device->lldd_dev;
1048 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1049 struct device *dev = &hisi_hba->pdev->dev;
1050 unsigned long flags;
1051 int rc = TMF_RESP_FUNC_FAILED;
1052
1053 sas_dev->dev_status = HISI_SAS_DEV_EH;
1054 if (dev_is_sata(device)) {
1055 struct sas_phy *phy;
1056
1057 /* Clear internal IO and then hardreset */
1058 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1059 HISI_SAS_INT_ABT_DEV, 0);
1060 if (rc == TMF_RESP_FUNC_FAILED)
1061 goto out;
1062
1063 phy = sas_get_local_phy(device);
1064
1065 rc = sas_phy_reset(phy, 1);
1066
1067 if (rc == 0) {
1068 spin_lock_irqsave(&hisi_hba->lock, flags);
1069 hisi_sas_release_task(hisi_hba, device);
1070 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1071 }
1072 sas_put_local_phy(phy);
1073 } else {
1074 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1075
1076 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1077 if (rc == TMF_RESP_FUNC_COMPLETE) {
1078 spin_lock_irqsave(&hisi_hba->lock, flags);
1079 hisi_sas_release_task(hisi_hba, device);
1080 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1081 }
1082 }
1083 out:
1084 if (rc != TMF_RESP_FUNC_COMPLETE)
1085 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
1086 sas_dev->device_id, rc);
1087 return rc;
1088 }
1089
1090 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1091 {
1092 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1093
1094 return hisi_sas_controller_reset(hisi_hba);
1095 }
1096
1097 static int hisi_sas_query_task(struct sas_task *task)
1098 {
1099 struct scsi_lun lun;
1100 struct hisi_sas_tmf_task tmf_task;
1101 int rc = TMF_RESP_FUNC_FAILED;
1102
1103 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1104 struct scsi_cmnd *cmnd = task->uldd_task;
1105 struct domain_device *device = task->dev;
1106 struct hisi_sas_slot *slot = task->lldd_task;
1107 u32 tag = slot->idx;
1108
1109 int_to_scsilun(cmnd->device->lun, &lun);
1110 tmf_task.tmf = TMF_QUERY_TASK;
1111 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1112
1113 rc = hisi_sas_debug_issue_ssp_tmf(device,
1114 lun.scsi_lun,
1115 &tmf_task);
1116 switch (rc) {
1117 /* The task is still in Lun, release it then */
1118 case TMF_RESP_FUNC_SUCC:
1119 /* The task is not in Lun or failed, reset the phy */
1120 case TMF_RESP_FUNC_FAILED:
1121 case TMF_RESP_FUNC_COMPLETE:
1122 break;
1123 default:
1124 rc = TMF_RESP_FUNC_FAILED;
1125 break;
1126 }
1127 }
1128 return rc;
1129 }
1130
1131 static int
1132 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id,
1133 struct sas_task *task, int abort_flag,
1134 int task_tag)
1135 {
1136 struct domain_device *device = task->dev;
1137 struct hisi_sas_device *sas_dev = device->lldd_dev;
1138 struct device *dev = &hisi_hba->pdev->dev;
1139 struct hisi_sas_port *port;
1140 struct hisi_sas_slot *slot;
1141 struct asd_sas_port *sas_port = device->port;
1142 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1143 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1144 unsigned long flags;
1145
1146 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
1147 return -EINVAL;
1148
1149 if (!device->port)
1150 return -1;
1151
1152 port = to_hisi_sas_port(sas_port);
1153
1154 /* simply get a slot and send abort command */
1155 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1156 if (rc)
1157 goto err_out;
1158 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
1159 &dlvry_queue, &dlvry_queue_slot);
1160 if (rc)
1161 goto err_out_tag;
1162
1163 slot = &hisi_hba->slot_info[slot_idx];
1164 memset(slot, 0, sizeof(struct hisi_sas_slot));
1165
1166 slot->idx = slot_idx;
1167 slot->n_elem = n_elem;
1168 slot->dlvry_queue = dlvry_queue;
1169 slot->dlvry_queue_slot = dlvry_queue_slot;
1170 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1171 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1172 slot->task = task;
1173 slot->port = port;
1174 task->lldd_task = slot;
1175
1176 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1177
1178 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1179 abort_flag, task_tag);
1180 if (rc)
1181 goto err_out_tag;
1182
1183
1184 list_add_tail(&slot->entry, &sas_dev->list);
1185 spin_lock_irqsave(&task->task_state_lock, flags);
1186 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1187 spin_unlock_irqrestore(&task->task_state_lock, flags);
1188
1189 hisi_hba->slot_prep = slot;
1190
1191 atomic64_inc(&sas_dev->running_req);
1192
1193 /* send abort command to our chip */
1194 hisi_hba->hw->start_delivery(hisi_hba);
1195
1196 return 0;
1197
1198 err_out_tag:
1199 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1200 err_out:
1201 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1202
1203 return rc;
1204 }
1205
1206 /**
1207 * hisi_sas_internal_task_abort -- execute an internal
1208 * abort command for single IO command or a device
1209 * @hisi_hba: host controller struct
1210 * @device: domain device
1211 * @abort_flag: mode of operation, device or single IO
1212 * @tag: tag of IO to be aborted (only relevant to single
1213 * IO mode)
1214 */
1215 static int
1216 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1217 struct domain_device *device,
1218 int abort_flag, int tag)
1219 {
1220 struct sas_task *task;
1221 struct hisi_sas_device *sas_dev = device->lldd_dev;
1222 struct device *dev = &hisi_hba->pdev->dev;
1223 int res;
1224 unsigned long flags;
1225
1226 if (!hisi_hba->hw->prep_abort)
1227 return -EOPNOTSUPP;
1228
1229 task = sas_alloc_slow_task(GFP_KERNEL);
1230 if (!task)
1231 return -ENOMEM;
1232
1233 task->dev = device;
1234 task->task_proto = device->tproto;
1235 task->task_done = hisi_sas_task_done;
1236 task->slow_task->timer.data = (unsigned long)task;
1237 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1238 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1239 add_timer(&task->slow_task->timer);
1240
1241 /* Lock as we are alloc'ing a slot, which cannot be interrupted */
1242 spin_lock_irqsave(&hisi_hba->lock, flags);
1243 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1244 task, abort_flag, tag);
1245 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1246 if (res) {
1247 del_timer(&task->slow_task->timer);
1248 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1249 res);
1250 goto exit;
1251 }
1252 wait_for_completion(&task->slow_task->completion);
1253 res = TMF_RESP_FUNC_FAILED;
1254
1255 /* Internal abort timed out */
1256 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1257 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1258 struct hisi_sas_slot *slot = task->lldd_task;
1259
1260 if (slot)
1261 slot->task = NULL;
1262 dev_err(dev, "internal task abort: timeout.\n");
1263 }
1264 }
1265
1266 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1267 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1268 res = TMF_RESP_FUNC_COMPLETE;
1269 goto exit;
1270 }
1271
1272 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1273 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1274 res = TMF_RESP_FUNC_SUCC;
1275 goto exit;
1276 }
1277
1278 exit:
1279 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1280 "resp: 0x%x sts 0x%x\n",
1281 SAS_ADDR(device->sas_addr),
1282 task,
1283 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1284 task->task_status.stat);
1285 sas_free_task(task);
1286
1287 return res;
1288 }
1289
1290 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1291 {
1292 hisi_sas_port_notify_formed(sas_phy);
1293 }
1294
1295 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1296 {
1297 phy->phy_attached = 0;
1298 phy->phy_type = 0;
1299 phy->port = NULL;
1300 }
1301
1302 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1303 {
1304 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1305 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1306 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1307
1308 if (rdy) {
1309 /* Phy down but ready */
1310 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1311 hisi_sas_port_notify_formed(sas_phy);
1312 } else {
1313 struct hisi_sas_port *port = phy->port;
1314
1315 /* Phy down and not ready */
1316 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1317 sas_phy_disconnected(sas_phy);
1318
1319 if (port) {
1320 if (phy->phy_type & PORT_TYPE_SAS) {
1321 int port_id = port->id;
1322
1323 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1324 port_id))
1325 port->port_attached = 0;
1326 } else if (phy->phy_type & PORT_TYPE_SATA)
1327 port->port_attached = 0;
1328 }
1329 hisi_sas_phy_disconnected(phy);
1330 }
1331 }
1332 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1333
1334 void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1335 u32 state)
1336 {
1337 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1338 int phy_no;
1339
1340 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1341 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1342 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1343 struct asd_sas_port *sas_port = sas_phy->port;
1344 struct domain_device *dev;
1345
1346 if (sas_phy->enabled) {
1347 /* Report PHY state change to libsas */
1348 if (state & (1 << phy_no))
1349 continue;
1350
1351 if (old_state & (1 << phy_no))
1352 /* PHY down but was up before */
1353 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1354 }
1355 if (!sas_port)
1356 continue;
1357 dev = sas_port->port_dev;
1358
1359 if (DEV_IS_EXPANDER(dev->dev_type))
1360 sas_ha->notify_phy_event(sas_phy, PORTE_BROADCAST_RCVD);
1361 }
1362 }
1363 EXPORT_SYMBOL_GPL(hisi_sas_rescan_topology);
1364
1365 static struct scsi_transport_template *hisi_sas_stt;
1366
1367 static struct scsi_host_template hisi_sas_sht = {
1368 .module = THIS_MODULE,
1369 .name = DRV_NAME,
1370 .queuecommand = sas_queuecommand,
1371 .target_alloc = sas_target_alloc,
1372 .slave_configure = hisi_sas_slave_configure,
1373 .scan_finished = hisi_sas_scan_finished,
1374 .scan_start = hisi_sas_scan_start,
1375 .change_queue_depth = sas_change_queue_depth,
1376 .bios_param = sas_bios_param,
1377 .can_queue = 1,
1378 .this_id = -1,
1379 .sg_tablesize = SG_ALL,
1380 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1381 .use_clustering = ENABLE_CLUSTERING,
1382 .eh_device_reset_handler = sas_eh_device_reset_handler,
1383 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1384 .target_destroy = sas_target_destroy,
1385 .ioctl = sas_ioctl,
1386 };
1387
1388 static struct sas_domain_function_template hisi_sas_transport_ops = {
1389 .lldd_dev_found = hisi_sas_dev_found,
1390 .lldd_dev_gone = hisi_sas_dev_gone,
1391 .lldd_execute_task = hisi_sas_queue_command,
1392 .lldd_control_phy = hisi_sas_control_phy,
1393 .lldd_abort_task = hisi_sas_abort_task,
1394 .lldd_abort_task_set = hisi_sas_abort_task_set,
1395 .lldd_clear_aca = hisi_sas_clear_aca,
1396 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1397 .lldd_lu_reset = hisi_sas_lu_reset,
1398 .lldd_query_task = hisi_sas_query_task,
1399 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1400 .lldd_port_formed = hisi_sas_port_formed,
1401 };
1402
1403 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1404 {
1405 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1406
1407 for (i = 0; i < hisi_hba->queue_count; i++) {
1408 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1409 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1410
1411 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1412 memset(hisi_hba->cmd_hdr[i], 0, s);
1413 dq->wr_point = 0;
1414
1415 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1416 memset(hisi_hba->complete_hdr[i], 0, s);
1417 cq->rd_point = 0;
1418 }
1419
1420 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1421 memset(hisi_hba->initial_fis, 0, s);
1422
1423 s = max_command_entries * sizeof(struct hisi_sas_iost);
1424 memset(hisi_hba->iost, 0, s);
1425
1426 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1427 memset(hisi_hba->breakpoint, 0, s);
1428
1429 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1430 memset(hisi_hba->sata_breakpoint, 0, s);
1431 }
1432 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1433
1434 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1435 {
1436 struct platform_device *pdev = hisi_hba->pdev;
1437 struct device *dev = &pdev->dev;
1438 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1439
1440 spin_lock_init(&hisi_hba->lock);
1441 for (i = 0; i < hisi_hba->n_phy; i++) {
1442 hisi_sas_phy_init(hisi_hba, i);
1443 hisi_hba->port[i].port_attached = 0;
1444 hisi_hba->port[i].id = -1;
1445 }
1446
1447 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1448 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1449 hisi_hba->devices[i].device_id = i;
1450 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1451 }
1452
1453 for (i = 0; i < hisi_hba->queue_count; i++) {
1454 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1455 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1456
1457 /* Completion queue structure */
1458 cq->id = i;
1459 cq->hisi_hba = hisi_hba;
1460
1461 /* Delivery queue structure */
1462 dq->id = i;
1463 dq->hisi_hba = hisi_hba;
1464
1465 /* Delivery queue */
1466 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1467 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1468 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1469 if (!hisi_hba->cmd_hdr[i])
1470 goto err_out;
1471
1472 /* Completion queue */
1473 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1474 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1475 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1476 if (!hisi_hba->complete_hdr[i])
1477 goto err_out;
1478 }
1479
1480 s = HISI_SAS_STATUS_BUF_SZ;
1481 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1482 dev, s, 16, 0);
1483 if (!hisi_hba->status_buffer_pool)
1484 goto err_out;
1485
1486 s = HISI_SAS_COMMAND_TABLE_SZ;
1487 hisi_hba->command_table_pool = dma_pool_create("command_table",
1488 dev, s, 16, 0);
1489 if (!hisi_hba->command_table_pool)
1490 goto err_out;
1491
1492 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1493 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1494 GFP_KERNEL);
1495 if (!hisi_hba->itct)
1496 goto err_out;
1497
1498 memset(hisi_hba->itct, 0, s);
1499
1500 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1501 sizeof(struct hisi_sas_slot),
1502 GFP_KERNEL);
1503 if (!hisi_hba->slot_info)
1504 goto err_out;
1505
1506 s = max_command_entries * sizeof(struct hisi_sas_iost);
1507 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1508 GFP_KERNEL);
1509 if (!hisi_hba->iost)
1510 goto err_out;
1511
1512 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1513 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1514 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1515 if (!hisi_hba->breakpoint)
1516 goto err_out;
1517
1518 hisi_hba->slot_index_count = max_command_entries;
1519 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1520 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1521 if (!hisi_hba->slot_index_tags)
1522 goto err_out;
1523
1524 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1525 sizeof(struct hisi_sas_sge_page), 16, 0);
1526 if (!hisi_hba->sge_page_pool)
1527 goto err_out;
1528
1529 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1530 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1531 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1532 if (!hisi_hba->initial_fis)
1533 goto err_out;
1534
1535 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1536 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1537 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1538 if (!hisi_hba->sata_breakpoint)
1539 goto err_out;
1540 hisi_sas_init_mem(hisi_hba);
1541
1542 hisi_sas_slot_index_init(hisi_hba);
1543
1544 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1545 if (!hisi_hba->wq) {
1546 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1547 goto err_out;
1548 }
1549
1550 return 0;
1551 err_out:
1552 return -ENOMEM;
1553 }
1554
1555 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1556 {
1557 struct device *dev = &hisi_hba->pdev->dev;
1558 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1559
1560 for (i = 0; i < hisi_hba->queue_count; i++) {
1561 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1562 if (hisi_hba->cmd_hdr[i])
1563 dma_free_coherent(dev, s,
1564 hisi_hba->cmd_hdr[i],
1565 hisi_hba->cmd_hdr_dma[i]);
1566
1567 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1568 if (hisi_hba->complete_hdr[i])
1569 dma_free_coherent(dev, s,
1570 hisi_hba->complete_hdr[i],
1571 hisi_hba->complete_hdr_dma[i]);
1572 }
1573
1574 dma_pool_destroy(hisi_hba->status_buffer_pool);
1575 dma_pool_destroy(hisi_hba->command_table_pool);
1576 dma_pool_destroy(hisi_hba->sge_page_pool);
1577
1578 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1579 if (hisi_hba->itct)
1580 dma_free_coherent(dev, s,
1581 hisi_hba->itct, hisi_hba->itct_dma);
1582
1583 s = max_command_entries * sizeof(struct hisi_sas_iost);
1584 if (hisi_hba->iost)
1585 dma_free_coherent(dev, s,
1586 hisi_hba->iost, hisi_hba->iost_dma);
1587
1588 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1589 if (hisi_hba->breakpoint)
1590 dma_free_coherent(dev, s,
1591 hisi_hba->breakpoint,
1592 hisi_hba->breakpoint_dma);
1593
1594
1595 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1596 if (hisi_hba->initial_fis)
1597 dma_free_coherent(dev, s,
1598 hisi_hba->initial_fis,
1599 hisi_hba->initial_fis_dma);
1600
1601 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1602 if (hisi_hba->sata_breakpoint)
1603 dma_free_coherent(dev, s,
1604 hisi_hba->sata_breakpoint,
1605 hisi_hba->sata_breakpoint_dma);
1606
1607 if (hisi_hba->wq)
1608 destroy_workqueue(hisi_hba->wq);
1609 }
1610
1611 static void hisi_sas_rst_work_handler(struct work_struct *work)
1612 {
1613 struct hisi_hba *hisi_hba =
1614 container_of(work, struct hisi_hba, rst_work);
1615
1616 hisi_sas_controller_reset(hisi_hba);
1617 }
1618
1619 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1620 const struct hisi_sas_hw *hw)
1621 {
1622 struct resource *res;
1623 struct Scsi_Host *shost;
1624 struct hisi_hba *hisi_hba;
1625 struct device *dev = &pdev->dev;
1626 struct device_node *np = pdev->dev.of_node;
1627 struct clk *refclk;
1628
1629 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1630 if (!shost) {
1631 dev_err(dev, "scsi host alloc failed\n");
1632 return NULL;
1633 }
1634 hisi_hba = shost_priv(shost);
1635
1636 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1637 hisi_hba->hw = hw;
1638 hisi_hba->pdev = pdev;
1639 hisi_hba->shost = shost;
1640 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1641
1642 init_timer(&hisi_hba->timer);
1643
1644 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1645 SAS_ADDR_SIZE))
1646 goto err_out;
1647
1648 if (np) {
1649 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1650 "hisilicon,sas-syscon");
1651 if (IS_ERR(hisi_hba->ctrl))
1652 goto err_out;
1653
1654 if (device_property_read_u32(dev, "ctrl-reset-reg",
1655 &hisi_hba->ctrl_reset_reg))
1656 goto err_out;
1657
1658 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1659 &hisi_hba->ctrl_reset_sts_reg))
1660 goto err_out;
1661
1662 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1663 &hisi_hba->ctrl_clock_ena_reg))
1664 goto err_out;
1665 }
1666
1667 refclk = devm_clk_get(&pdev->dev, NULL);
1668 if (IS_ERR(refclk))
1669 dev_dbg(dev, "no ref clk property\n");
1670 else
1671 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1672
1673 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1674 goto err_out;
1675
1676 if (device_property_read_u32(dev, "queue-count",
1677 &hisi_hba->queue_count))
1678 goto err_out;
1679
1680 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1681 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1682 dev_err(dev, "No usable DMA addressing method\n");
1683 goto err_out;
1684 }
1685
1686 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1687 hisi_hba->regs = devm_ioremap_resource(dev, res);
1688 if (IS_ERR(hisi_hba->regs))
1689 goto err_out;
1690
1691 if (hisi_sas_alloc(hisi_hba, shost)) {
1692 hisi_sas_free(hisi_hba);
1693 goto err_out;
1694 }
1695
1696 return shost;
1697 err_out:
1698 kfree(shost);
1699 dev_err(dev, "shost alloc failed\n");
1700 return NULL;
1701 }
1702
1703 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1704 {
1705 int i;
1706
1707 for (i = 0; i < hisi_hba->n_phy; i++)
1708 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1709 hisi_hba->sas_addr,
1710 SAS_ADDR_SIZE);
1711 }
1712
1713 int hisi_sas_probe(struct platform_device *pdev,
1714 const struct hisi_sas_hw *hw)
1715 {
1716 struct Scsi_Host *shost;
1717 struct hisi_hba *hisi_hba;
1718 struct device *dev = &pdev->dev;
1719 struct asd_sas_phy **arr_phy;
1720 struct asd_sas_port **arr_port;
1721 struct sas_ha_struct *sha;
1722 int rc, phy_nr, port_nr, i;
1723
1724 shost = hisi_sas_shost_alloc(pdev, hw);
1725 if (!shost)
1726 return -ENOMEM;
1727
1728 sha = SHOST_TO_SAS_HA(shost);
1729 hisi_hba = shost_priv(shost);
1730 platform_set_drvdata(pdev, sha);
1731
1732 phy_nr = port_nr = hisi_hba->n_phy;
1733
1734 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1735 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1736 if (!arr_phy || !arr_port) {
1737 rc = -ENOMEM;
1738 goto err_out_ha;
1739 }
1740
1741 sha->sas_phy = arr_phy;
1742 sha->sas_port = arr_port;
1743 sha->lldd_ha = hisi_hba;
1744
1745 shost->transportt = hisi_sas_stt;
1746 shost->max_id = HISI_SAS_MAX_DEVICES;
1747 shost->max_lun = ~0;
1748 shost->max_channel = 1;
1749 shost->max_cmd_len = 16;
1750 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1751 shost->can_queue = hisi_hba->hw->max_command_entries;
1752 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1753
1754 sha->sas_ha_name = DRV_NAME;
1755 sha->dev = &hisi_hba->pdev->dev;
1756 sha->lldd_module = THIS_MODULE;
1757 sha->sas_addr = &hisi_hba->sas_addr[0];
1758 sha->num_phys = hisi_hba->n_phy;
1759 sha->core.shost = hisi_hba->shost;
1760
1761 for (i = 0; i < hisi_hba->n_phy; i++) {
1762 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1763 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1764 }
1765
1766 hisi_sas_init_add(hisi_hba);
1767
1768 rc = scsi_add_host(shost, &pdev->dev);
1769 if (rc)
1770 goto err_out_ha;
1771
1772 rc = sas_register_ha(sha);
1773 if (rc)
1774 goto err_out_register_ha;
1775
1776 rc = hisi_hba->hw->hw_init(hisi_hba);
1777 if (rc)
1778 goto err_out_register_ha;
1779
1780 scsi_scan_host(shost);
1781
1782 return 0;
1783
1784 err_out_register_ha:
1785 scsi_remove_host(shost);
1786 err_out_ha:
1787 hisi_sas_free(hisi_hba);
1788 kfree(shost);
1789 return rc;
1790 }
1791 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1792
1793 int hisi_sas_remove(struct platform_device *pdev)
1794 {
1795 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1796 struct hisi_hba *hisi_hba = sha->lldd_ha;
1797 struct Scsi_Host *shost = sha->core.shost;
1798
1799 sas_unregister_ha(sha);
1800 sas_remove_host(sha->core.shost);
1801
1802 hisi_sas_free(hisi_hba);
1803 kfree(shost);
1804 return 0;
1805 }
1806 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1807
1808 static __init int hisi_sas_init(void)
1809 {
1810 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1811
1812 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1813 if (!hisi_sas_stt)
1814 return -ENOMEM;
1815
1816 return 0;
1817 }
1818
1819 static __exit void hisi_sas_exit(void)
1820 {
1821 sas_release_transport(hisi_sas_stt);
1822 }
1823
1824 module_init(hisi_sas_init);
1825 module_exit(hisi_sas_exit);
1826
1827 MODULE_VERSION(DRV_VERSION);
1828 MODULE_LICENSE("GPL");
1829 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1830 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1831 MODULE_ALIAS("platform:" DRV_NAME);
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