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qla2xxx: Fix NULL pointer deref in QLA interrupt
[deliverable/linux.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
21 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
22 {
23 return device->port->ha->lldd_ha;
24 }
25
26 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
27 {
28 void *bitmap = hisi_hba->slot_index_tags;
29
30 clear_bit(slot_idx, bitmap);
31 }
32
33 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
34 {
35 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
36 }
37
38 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
39 {
40 void *bitmap = hisi_hba->slot_index_tags;
41
42 set_bit(slot_idx, bitmap);
43 }
44
45 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
46 {
47 unsigned int index;
48 void *bitmap = hisi_hba->slot_index_tags;
49
50 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
51 if (index >= hisi_hba->slot_index_count)
52 return -SAS_QUEUE_FULL;
53 hisi_sas_slot_index_set(hisi_hba, index);
54 *slot_idx = index;
55 return 0;
56 }
57
58 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
59 {
60 int i;
61
62 for (i = 0; i < hisi_hba->slot_index_count; ++i)
63 hisi_sas_slot_index_clear(hisi_hba, i);
64 }
65
66 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
67 struct hisi_sas_slot *slot)
68 {
69 struct device *dev = &hisi_hba->pdev->dev;
70
71 if (!slot->task)
72 return;
73
74 if (!sas_protocol_ata(task->task_proto))
75 if (slot->n_elem)
76 dma_unmap_sg(dev, task->scatter, slot->n_elem,
77 task->data_dir);
78
79 if (slot->command_table)
80 dma_pool_free(hisi_hba->command_table_pool,
81 slot->command_table, slot->command_table_dma);
82
83 if (slot->status_buffer)
84 dma_pool_free(hisi_hba->status_buffer_pool,
85 slot->status_buffer, slot->status_buffer_dma);
86
87 if (slot->sge_page)
88 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
89 slot->sge_page_dma);
90
91 list_del_init(&slot->entry);
92 task->lldd_task = NULL;
93 slot->task = NULL;
94 slot->port = NULL;
95 hisi_sas_slot_index_free(hisi_hba, slot->idx);
96 memset(slot, 0, sizeof(*slot));
97 }
98 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
99
100 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
101 struct hisi_sas_slot *slot)
102 {
103 return hisi_hba->hw->prep_smp(hisi_hba, slot);
104 }
105
106 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
107 struct hisi_sas_slot *slot, int is_tmf,
108 struct hisi_sas_tmf_task *tmf)
109 {
110 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
111 }
112
113 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
114 struct hisi_sas_slot *slot)
115 {
116 return hisi_hba->hw->prep_stp(hisi_hba, slot);
117 }
118
119 /*
120 * This function will issue an abort TMF regardless of whether the
121 * task is in the sdev or not. Then it will do the task complete
122 * cleanup and callbacks.
123 */
124 static void hisi_sas_slot_abort(struct work_struct *work)
125 {
126 struct hisi_sas_slot *abort_slot =
127 container_of(work, struct hisi_sas_slot, abort_slot);
128 struct sas_task *task = abort_slot->task;
129 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
130 struct scsi_cmnd *cmnd = task->uldd_task;
131 struct hisi_sas_tmf_task tmf_task;
132 struct domain_device *device = task->dev;
133 struct hisi_sas_device *sas_dev = device->lldd_dev;
134 struct scsi_lun lun;
135 struct device *dev = &hisi_hba->pdev->dev;
136 int tag = abort_slot->idx;
137
138 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
139 dev_err(dev, "cannot abort slot for non-ssp task\n");
140 goto out;
141 }
142
143 int_to_scsilun(cmnd->device->lun, &lun);
144 tmf_task.tmf = TMF_ABORT_TASK;
145 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
146
147 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
148 out:
149 /* Do cleanup for this task */
150 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
151 if (task->task_done)
152 task->task_done(task);
153 if (sas_dev && sas_dev->running_req)
154 sas_dev->running_req--;
155 }
156
157 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
158 int is_tmf, struct hisi_sas_tmf_task *tmf,
159 int *pass)
160 {
161 struct domain_device *device = task->dev;
162 struct hisi_sas_device *sas_dev = device->lldd_dev;
163 struct hisi_sas_port *port;
164 struct hisi_sas_slot *slot;
165 struct hisi_sas_cmd_hdr *cmd_hdr_base;
166 struct device *dev = &hisi_hba->pdev->dev;
167 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
168
169 if (!device->port) {
170 struct task_status_struct *ts = &task->task_status;
171
172 ts->resp = SAS_TASK_UNDELIVERED;
173 ts->stat = SAS_PHY_DOWN;
174 /*
175 * libsas will use dev->port, should
176 * not call task_done for sata
177 */
178 if (device->dev_type != SAS_SATA_DEV)
179 task->task_done(task);
180 return 0;
181 }
182
183 if (DEV_IS_GONE(sas_dev)) {
184 if (sas_dev)
185 dev_info(dev, "task prep: device %llu not ready\n",
186 sas_dev->device_id);
187 else
188 dev_info(dev, "task prep: device %016llx not ready\n",
189 SAS_ADDR(device->sas_addr));
190
191 rc = SAS_PHY_DOWN;
192 return rc;
193 }
194 port = device->port->lldd_port;
195 if (port && !port->port_attached && !tmf) {
196 if (sas_protocol_ata(task->task_proto)) {
197 struct task_status_struct *ts = &task->task_status;
198
199 dev_info(dev,
200 "task prep: SATA/STP port%d not attach device\n",
201 device->port->id);
202 ts->resp = SAS_TASK_COMPLETE;
203 ts->stat = SAS_PHY_DOWN;
204 task->task_done(task);
205 } else {
206 struct task_status_struct *ts = &task->task_status;
207
208 dev_info(dev,
209 "task prep: SAS port%d does not attach device\n",
210 device->port->id);
211 ts->resp = SAS_TASK_UNDELIVERED;
212 ts->stat = SAS_PHY_DOWN;
213 task->task_done(task);
214 }
215 return 0;
216 }
217
218 if (!sas_protocol_ata(task->task_proto)) {
219 if (task->num_scatter) {
220 n_elem = dma_map_sg(dev, task->scatter,
221 task->num_scatter, task->data_dir);
222 if (!n_elem) {
223 rc = -ENOMEM;
224 goto prep_out;
225 }
226 }
227 } else
228 n_elem = task->num_scatter;
229
230 if (hisi_hba->hw->slot_index_alloc)
231 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
232 device);
233 else
234 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
235 if (rc)
236 goto err_out;
237 rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
238 &dlvry_queue_slot);
239 if (rc)
240 goto err_out_tag;
241
242 slot = &hisi_hba->slot_info[slot_idx];
243 memset(slot, 0, sizeof(struct hisi_sas_slot));
244
245 slot->idx = slot_idx;
246 slot->n_elem = n_elem;
247 slot->dlvry_queue = dlvry_queue;
248 slot->dlvry_queue_slot = dlvry_queue_slot;
249 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
250 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
251 slot->task = task;
252 slot->port = port;
253 task->lldd_task = slot;
254 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
255
256 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
257 GFP_ATOMIC,
258 &slot->status_buffer_dma);
259 if (!slot->status_buffer) {
260 rc = -ENOMEM;
261 goto err_out_slot_buf;
262 }
263 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
264
265 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
266 GFP_ATOMIC,
267 &slot->command_table_dma);
268 if (!slot->command_table) {
269 rc = -ENOMEM;
270 goto err_out_status_buf;
271 }
272 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
273 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
274
275 switch (task->task_proto) {
276 case SAS_PROTOCOL_SMP:
277 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
278 break;
279 case SAS_PROTOCOL_SSP:
280 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
281 break;
282 case SAS_PROTOCOL_SATA:
283 case SAS_PROTOCOL_STP:
284 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
285 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
286 break;
287 default:
288 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
289 task->task_proto);
290 rc = -EINVAL;
291 break;
292 }
293
294 if (rc) {
295 dev_err(dev, "task prep: rc = 0x%x\n", rc);
296 if (slot->sge_page)
297 goto err_out_sge;
298 goto err_out_command_table;
299 }
300
301 list_add_tail(&slot->entry, &port->list);
302 spin_lock(&task->task_state_lock);
303 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
304 spin_unlock(&task->task_state_lock);
305
306 hisi_hba->slot_prep = slot;
307
308 sas_dev->running_req++;
309 ++(*pass);
310
311 return 0;
312
313 err_out_sge:
314 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
315 slot->sge_page_dma);
316 err_out_command_table:
317 dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
318 slot->command_table_dma);
319 err_out_status_buf:
320 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
321 slot->status_buffer_dma);
322 err_out_slot_buf:
323 /* Nothing to be done */
324 err_out_tag:
325 hisi_sas_slot_index_free(hisi_hba, slot_idx);
326 err_out:
327 dev_err(dev, "task prep: failed[%d]!\n", rc);
328 if (!sas_protocol_ata(task->task_proto))
329 if (n_elem)
330 dma_unmap_sg(dev, task->scatter, n_elem,
331 task->data_dir);
332 prep_out:
333 return rc;
334 }
335
336 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
337 int is_tmf, struct hisi_sas_tmf_task *tmf)
338 {
339 u32 rc;
340 u32 pass = 0;
341 unsigned long flags;
342 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
343 struct device *dev = &hisi_hba->pdev->dev;
344
345 /* protect task_prep and start_delivery sequence */
346 spin_lock_irqsave(&hisi_hba->lock, flags);
347 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
348 if (rc)
349 dev_err(dev, "task exec: failed[%d]!\n", rc);
350
351 if (likely(pass))
352 hisi_hba->hw->start_delivery(hisi_hba);
353 spin_unlock_irqrestore(&hisi_hba->lock, flags);
354
355 return rc;
356 }
357
358 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
359 {
360 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
361 struct asd_sas_phy *sas_phy = &phy->sas_phy;
362 struct sas_ha_struct *sas_ha;
363
364 if (!phy->phy_attached)
365 return;
366
367 sas_ha = &hisi_hba->sha;
368 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
369
370 if (sas_phy->phy) {
371 struct sas_phy *sphy = sas_phy->phy;
372
373 sphy->negotiated_linkrate = sas_phy->linkrate;
374 sphy->minimum_linkrate = phy->minimum_linkrate;
375 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
376 sphy->maximum_linkrate = phy->maximum_linkrate;
377 }
378
379 if (phy->phy_type & PORT_TYPE_SAS) {
380 struct sas_identify_frame *id;
381
382 id = (struct sas_identify_frame *)phy->frame_rcvd;
383 id->dev_type = phy->identify.device_type;
384 id->initiator_bits = SAS_PROTOCOL_ALL;
385 id->target_bits = phy->identify.target_port_protocols;
386 } else if (phy->phy_type & PORT_TYPE_SATA) {
387 /*Nothing*/
388 }
389
390 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
391 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
392 }
393
394 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
395 {
396 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
397 struct hisi_sas_device *sas_dev = NULL;
398 int i;
399
400 spin_lock(&hisi_hba->lock);
401 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
402 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
403 hisi_hba->devices[i].device_id = i;
404 sas_dev = &hisi_hba->devices[i];
405 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
406 sas_dev->dev_type = device->dev_type;
407 sas_dev->hisi_hba = hisi_hba;
408 sas_dev->sas_device = device;
409 break;
410 }
411 }
412 spin_unlock(&hisi_hba->lock);
413
414 return sas_dev;
415 }
416
417 static int hisi_sas_dev_found(struct domain_device *device)
418 {
419 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
420 struct domain_device *parent_dev = device->parent;
421 struct hisi_sas_device *sas_dev;
422 struct device *dev = &hisi_hba->pdev->dev;
423
424 if (hisi_hba->hw->alloc_dev)
425 sas_dev = hisi_hba->hw->alloc_dev(device);
426 else
427 sas_dev = hisi_sas_alloc_dev(device);
428 if (!sas_dev) {
429 dev_err(dev, "fail alloc dev: max support %d devices\n",
430 HISI_SAS_MAX_DEVICES);
431 return -EINVAL;
432 }
433
434 device->lldd_dev = sas_dev;
435 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
436
437 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
438 int phy_no;
439 u8 phy_num = parent_dev->ex_dev.num_phys;
440 struct ex_phy *phy;
441
442 for (phy_no = 0; phy_no < phy_num; phy_no++) {
443 phy = &parent_dev->ex_dev.ex_phy[phy_no];
444 if (SAS_ADDR(phy->attached_sas_addr) ==
445 SAS_ADDR(device->sas_addr)) {
446 sas_dev->attached_phy = phy_no;
447 break;
448 }
449 }
450
451 if (phy_no == phy_num) {
452 dev_info(dev, "dev found: no attached "
453 "dev:%016llx at ex:%016llx\n",
454 SAS_ADDR(device->sas_addr),
455 SAS_ADDR(parent_dev->sas_addr));
456 return -EINVAL;
457 }
458 }
459
460 return 0;
461 }
462
463 static int hisi_sas_slave_configure(struct scsi_device *sdev)
464 {
465 struct domain_device *dev = sdev_to_domain_dev(sdev);
466 int ret = sas_slave_configure(sdev);
467
468 if (ret)
469 return ret;
470 if (!dev_is_sata(dev))
471 sas_change_queue_depth(sdev, 64);
472
473 return 0;
474 }
475
476 static void hisi_sas_scan_start(struct Scsi_Host *shost)
477 {
478 struct hisi_hba *hisi_hba = shost_priv(shost);
479 int i;
480
481 for (i = 0; i < hisi_hba->n_phy; ++i)
482 hisi_sas_bytes_dmaed(hisi_hba, i);
483
484 hisi_hba->scan_finished = 1;
485 }
486
487 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
488 {
489 struct hisi_hba *hisi_hba = shost_priv(shost);
490 struct sas_ha_struct *sha = &hisi_hba->sha;
491
492 if (hisi_hba->scan_finished == 0)
493 return 0;
494
495 sas_drain_work(sha);
496 return 1;
497 }
498
499 static void hisi_sas_phyup_work(struct work_struct *work)
500 {
501 struct hisi_sas_phy *phy =
502 container_of(work, struct hisi_sas_phy, phyup_ws);
503 struct hisi_hba *hisi_hba = phy->hisi_hba;
504 struct asd_sas_phy *sas_phy = &phy->sas_phy;
505 int phy_no = sas_phy->id;
506
507 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
508 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
509 }
510
511 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
512 {
513 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
514 struct asd_sas_phy *sas_phy = &phy->sas_phy;
515
516 phy->hisi_hba = hisi_hba;
517 phy->port = NULL;
518 init_timer(&phy->timer);
519 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
520 sas_phy->class = SAS;
521 sas_phy->iproto = SAS_PROTOCOL_ALL;
522 sas_phy->tproto = 0;
523 sas_phy->type = PHY_TYPE_PHYSICAL;
524 sas_phy->role = PHY_ROLE_INITIATOR;
525 sas_phy->oob_mode = OOB_NOT_CONNECTED;
526 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
527 sas_phy->id = phy_no;
528 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
529 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
530 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
531 sas_phy->lldd_phy = phy;
532
533 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
534 }
535
536 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
537 {
538 struct sas_ha_struct *sas_ha = sas_phy->ha;
539 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
540 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
541 struct asd_sas_port *sas_port = sas_phy->port;
542 struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
543 unsigned long flags;
544
545 if (!sas_port)
546 return;
547
548 spin_lock_irqsave(&hisi_hba->lock, flags);
549 port->port_attached = 1;
550 port->id = phy->port_id;
551 phy->port = port;
552 sas_port->lldd_port = port;
553 spin_unlock_irqrestore(&hisi_hba->lock, flags);
554 }
555
556 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
557 struct domain_device *device)
558 {
559 struct hisi_sas_phy *phy;
560 struct hisi_sas_port *port;
561 struct hisi_sas_slot *slot, *slot2;
562 struct device *dev = &hisi_hba->pdev->dev;
563
564 phy = &hisi_hba->phy[phy_no];
565 port = phy->port;
566 if (!port)
567 return;
568
569 list_for_each_entry_safe(slot, slot2, &port->list, entry) {
570 struct sas_task *task;
571
572 task = slot->task;
573 if (device && task->dev != device)
574 continue;
575
576 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
577 slot->dlvry_queue, slot->dlvry_queue_slot, task);
578 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
579 }
580 }
581
582 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
583 {
584 struct domain_device *device;
585 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
586 struct asd_sas_port *sas_port = sas_phy->port;
587
588 list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
589 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
590 }
591
592 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
593 struct domain_device *device)
594 {
595 struct asd_sas_port *port = device->port;
596 struct asd_sas_phy *sas_phy;
597
598 list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
599 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
600 }
601
602 static void hisi_sas_dev_gone(struct domain_device *device)
603 {
604 struct hisi_sas_device *sas_dev = device->lldd_dev;
605 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
606 struct device *dev = &hisi_hba->pdev->dev;
607 u64 dev_id = sas_dev->device_id;
608
609 dev_info(dev, "found dev[%lld:%x] is gone\n",
610 sas_dev->device_id, sas_dev->dev_type);
611
612 hisi_hba->hw->free_device(hisi_hba, sas_dev);
613 device->lldd_dev = NULL;
614 memset(sas_dev, 0, sizeof(*sas_dev));
615 sas_dev->device_id = dev_id;
616 sas_dev->dev_type = SAS_PHY_UNUSED;
617 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
618 }
619
620 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
621 {
622 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
623 }
624
625 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
626 void *funcdata)
627 {
628 struct sas_ha_struct *sas_ha = sas_phy->ha;
629 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
630 int phy_no = sas_phy->id;
631
632 switch (func) {
633 case PHY_FUNC_HARD_RESET:
634 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
635 break;
636
637 case PHY_FUNC_LINK_RESET:
638 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
639 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
640 break;
641
642 case PHY_FUNC_DISABLE:
643 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
644 break;
645
646 case PHY_FUNC_SET_LINK_RATE:
647 case PHY_FUNC_RELEASE_SPINUP_HOLD:
648 default:
649 return -EOPNOTSUPP;
650 }
651 return 0;
652 }
653
654 static void hisi_sas_task_done(struct sas_task *task)
655 {
656 if (!del_timer(&task->slow_task->timer))
657 return;
658 complete(&task->slow_task->completion);
659 }
660
661 static void hisi_sas_tmf_timedout(unsigned long data)
662 {
663 struct sas_task *task = (struct sas_task *)data;
664
665 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
666 complete(&task->slow_task->completion);
667 }
668
669 #define TASK_TIMEOUT 20
670 #define TASK_RETRY 3
671 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
672 void *parameter, u32 para_len,
673 struct hisi_sas_tmf_task *tmf)
674 {
675 struct hisi_sas_device *sas_dev = device->lldd_dev;
676 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
677 struct device *dev = &hisi_hba->pdev->dev;
678 struct sas_task *task;
679 int res, retry;
680
681 for (retry = 0; retry < TASK_RETRY; retry++) {
682 task = sas_alloc_slow_task(GFP_KERNEL);
683 if (!task)
684 return -ENOMEM;
685
686 task->dev = device;
687 task->task_proto = device->tproto;
688
689 memcpy(&task->ssp_task, parameter, para_len);
690 task->task_done = hisi_sas_task_done;
691
692 task->slow_task->timer.data = (unsigned long) task;
693 task->slow_task->timer.function = hisi_sas_tmf_timedout;
694 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
695 add_timer(&task->slow_task->timer);
696
697 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
698
699 if (res) {
700 del_timer(&task->slow_task->timer);
701 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
702 res);
703 goto ex_err;
704 }
705
706 wait_for_completion(&task->slow_task->completion);
707 res = TMF_RESP_FUNC_FAILED;
708 /* Even TMF timed out, return direct. */
709 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
710 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
711 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
712 tmf->tag_of_task_to_be_managed);
713 if (task->lldd_task) {
714 struct hisi_sas_slot *slot =
715 task->lldd_task;
716
717 hisi_sas_slot_task_free(hisi_hba,
718 task, slot);
719 }
720
721 goto ex_err;
722 }
723 }
724
725 if (task->task_status.resp == SAS_TASK_COMPLETE &&
726 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
727 res = TMF_RESP_FUNC_COMPLETE;
728 break;
729 }
730
731 if (task->task_status.resp == SAS_TASK_COMPLETE &&
732 task->task_status.stat == SAS_DATA_UNDERRUN) {
733 /* no error, but return the number of bytes of
734 * underrun
735 */
736 dev_warn(dev, "abort tmf: task to dev %016llx "
737 "resp: 0x%x sts 0x%x underrun\n",
738 SAS_ADDR(device->sas_addr),
739 task->task_status.resp,
740 task->task_status.stat);
741 res = task->task_status.residual;
742 break;
743 }
744
745 if (task->task_status.resp == SAS_TASK_COMPLETE &&
746 task->task_status.stat == SAS_DATA_OVERRUN) {
747 dev_warn(dev, "abort tmf: blocked task error\n");
748 res = -EMSGSIZE;
749 break;
750 }
751
752 dev_warn(dev, "abort tmf: task to dev "
753 "%016llx resp: 0x%x status 0x%x\n",
754 SAS_ADDR(device->sas_addr), task->task_status.resp,
755 task->task_status.stat);
756 sas_free_task(task);
757 task = NULL;
758 }
759 ex_err:
760 WARN_ON(retry == TASK_RETRY);
761 sas_free_task(task);
762 return res;
763 }
764
765 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
766 u8 *lun, struct hisi_sas_tmf_task *tmf)
767 {
768 struct sas_ssp_task ssp_task;
769
770 if (!(device->tproto & SAS_PROTOCOL_SSP))
771 return TMF_RESP_FUNC_ESUPP;
772
773 memcpy(ssp_task.LUN, lun, 8);
774
775 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
776 sizeof(ssp_task), tmf);
777 }
778
779 static int hisi_sas_abort_task(struct sas_task *task)
780 {
781 struct scsi_lun lun;
782 struct hisi_sas_tmf_task tmf_task;
783 struct domain_device *device = task->dev;
784 struct hisi_sas_device *sas_dev = device->lldd_dev;
785 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
786 struct device *dev = &hisi_hba->pdev->dev;
787 int rc = TMF_RESP_FUNC_FAILED;
788 unsigned long flags;
789
790 if (!sas_dev) {
791 dev_warn(dev, "Device has been removed\n");
792 return TMF_RESP_FUNC_FAILED;
793 }
794
795 spin_lock_irqsave(&task->task_state_lock, flags);
796 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
797 spin_unlock_irqrestore(&task->task_state_lock, flags);
798 rc = TMF_RESP_FUNC_COMPLETE;
799 goto out;
800 }
801
802 spin_unlock_irqrestore(&task->task_state_lock, flags);
803 sas_dev->dev_status = HISI_SAS_DEV_EH;
804 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
805 struct scsi_cmnd *cmnd = task->uldd_task;
806 struct hisi_sas_slot *slot = task->lldd_task;
807 u32 tag = slot->idx;
808
809 int_to_scsilun(cmnd->device->lun, &lun);
810 tmf_task.tmf = TMF_ABORT_TASK;
811 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
812
813 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
814 &tmf_task);
815
816 /* if successful, clear the task and callback forwards.*/
817 if (rc == TMF_RESP_FUNC_COMPLETE) {
818 if (task->lldd_task) {
819 struct hisi_sas_slot *slot;
820
821 slot = &hisi_hba->slot_info
822 [tmf_task.tag_of_task_to_be_managed];
823 spin_lock_irqsave(&hisi_hba->lock, flags);
824 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
825 spin_unlock_irqrestore(&hisi_hba->lock, flags);
826 }
827 }
828
829 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
830 task->task_proto & SAS_PROTOCOL_STP) {
831 if (task->dev->dev_type == SAS_SATA_DEV) {
832 struct hisi_slot_info *slot = task->lldd_task;
833
834 dev_notice(dev, "abort task: hba=%p task=%p slot=%p\n",
835 hisi_hba, task, slot);
836 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
837 rc = TMF_RESP_FUNC_COMPLETE;
838 goto out;
839 }
840
841 }
842
843 out:
844 if (rc != TMF_RESP_FUNC_COMPLETE)
845 dev_notice(dev, "abort task: rc=%d\n", rc);
846 return rc;
847 }
848
849 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
850 {
851 struct hisi_sas_tmf_task tmf_task;
852 int rc = TMF_RESP_FUNC_FAILED;
853
854 tmf_task.tmf = TMF_ABORT_TASK_SET;
855 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
856
857 return rc;
858 }
859
860 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
861 {
862 int rc = TMF_RESP_FUNC_FAILED;
863 struct hisi_sas_tmf_task tmf_task;
864
865 tmf_task.tmf = TMF_CLEAR_ACA;
866 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
867
868 return rc;
869 }
870
871 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
872 {
873 struct sas_phy *phy = sas_get_local_phy(device);
874 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
875 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
876 rc = sas_phy_reset(phy, reset_type);
877 sas_put_local_phy(phy);
878 msleep(2000);
879 return rc;
880 }
881
882 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
883 {
884 struct hisi_sas_device *sas_dev = device->lldd_dev;
885 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
886 unsigned long flags;
887 int rc = TMF_RESP_FUNC_FAILED;
888
889 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
890 return TMF_RESP_FUNC_FAILED;
891 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
892
893 rc = hisi_sas_debug_I_T_nexus_reset(device);
894
895 spin_lock_irqsave(&hisi_hba->lock, flags);
896 hisi_sas_release_task(hisi_hba, device);
897 spin_unlock_irqrestore(&hisi_hba->lock, flags);
898
899 return 0;
900 }
901
902 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
903 {
904 struct hisi_sas_tmf_task tmf_task;
905 struct hisi_sas_device *sas_dev = device->lldd_dev;
906 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
907 struct device *dev = &hisi_hba->pdev->dev;
908 unsigned long flags;
909 int rc = TMF_RESP_FUNC_FAILED;
910
911 tmf_task.tmf = TMF_LU_RESET;
912 sas_dev->dev_status = HISI_SAS_DEV_EH;
913 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
914 if (rc == TMF_RESP_FUNC_COMPLETE) {
915 spin_lock_irqsave(&hisi_hba->lock, flags);
916 hisi_sas_release_task(hisi_hba, device);
917 spin_unlock_irqrestore(&hisi_hba->lock, flags);
918 }
919
920 /* If failed, fall-through I_T_Nexus reset */
921 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
922 sas_dev->device_id, rc);
923 return rc;
924 }
925
926 static int hisi_sas_query_task(struct sas_task *task)
927 {
928 struct scsi_lun lun;
929 struct hisi_sas_tmf_task tmf_task;
930 int rc = TMF_RESP_FUNC_FAILED;
931
932 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
933 struct scsi_cmnd *cmnd = task->uldd_task;
934 struct domain_device *device = task->dev;
935 struct hisi_sas_slot *slot = task->lldd_task;
936 u32 tag = slot->idx;
937
938 int_to_scsilun(cmnd->device->lun, &lun);
939 tmf_task.tmf = TMF_QUERY_TASK;
940 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
941
942 rc = hisi_sas_debug_issue_ssp_tmf(device,
943 lun.scsi_lun,
944 &tmf_task);
945 switch (rc) {
946 /* The task is still in Lun, release it then */
947 case TMF_RESP_FUNC_SUCC:
948 /* The task is not in Lun or failed, reset the phy */
949 case TMF_RESP_FUNC_FAILED:
950 case TMF_RESP_FUNC_COMPLETE:
951 break;
952 }
953 }
954 return rc;
955 }
956
957 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
958 {
959 hisi_sas_port_notify_formed(sas_phy);
960 }
961
962 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
963 {
964 hisi_sas_port_notify_deformed(sas_phy);
965 }
966
967 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
968 {
969 phy->phy_attached = 0;
970 phy->phy_type = 0;
971 phy->port = NULL;
972 }
973
974 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
975 {
976 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
977 struct asd_sas_phy *sas_phy = &phy->sas_phy;
978 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
979
980 if (rdy) {
981 /* Phy down but ready */
982 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
983 hisi_sas_port_notify_formed(sas_phy);
984 } else {
985 struct hisi_sas_port *port = phy->port;
986
987 /* Phy down and not ready */
988 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
989 sas_phy_disconnected(sas_phy);
990
991 if (port) {
992 if (phy->phy_type & PORT_TYPE_SAS) {
993 int port_id = port->id;
994
995 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
996 port_id))
997 port->port_attached = 0;
998 } else if (phy->phy_type & PORT_TYPE_SATA)
999 port->port_attached = 0;
1000 }
1001 hisi_sas_phy_disconnected(phy);
1002 }
1003 }
1004 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1005
1006 static struct scsi_transport_template *hisi_sas_stt;
1007
1008 static struct scsi_host_template hisi_sas_sht = {
1009 .module = THIS_MODULE,
1010 .name = DRV_NAME,
1011 .queuecommand = sas_queuecommand,
1012 .target_alloc = sas_target_alloc,
1013 .slave_configure = hisi_sas_slave_configure,
1014 .scan_finished = hisi_sas_scan_finished,
1015 .scan_start = hisi_sas_scan_start,
1016 .change_queue_depth = sas_change_queue_depth,
1017 .bios_param = sas_bios_param,
1018 .can_queue = 1,
1019 .this_id = -1,
1020 .sg_tablesize = SG_ALL,
1021 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1022 .use_clustering = ENABLE_CLUSTERING,
1023 .eh_device_reset_handler = sas_eh_device_reset_handler,
1024 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1025 .target_destroy = sas_target_destroy,
1026 .ioctl = sas_ioctl,
1027 };
1028
1029 static struct sas_domain_function_template hisi_sas_transport_ops = {
1030 .lldd_dev_found = hisi_sas_dev_found,
1031 .lldd_dev_gone = hisi_sas_dev_gone,
1032 .lldd_execute_task = hisi_sas_queue_command,
1033 .lldd_control_phy = hisi_sas_control_phy,
1034 .lldd_abort_task = hisi_sas_abort_task,
1035 .lldd_abort_task_set = hisi_sas_abort_task_set,
1036 .lldd_clear_aca = hisi_sas_clear_aca,
1037 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1038 .lldd_lu_reset = hisi_sas_lu_reset,
1039 .lldd_query_task = hisi_sas_query_task,
1040 .lldd_port_formed = hisi_sas_port_formed,
1041 .lldd_port_deformed = hisi_sas_port_deformed,
1042 };
1043
1044 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1045 {
1046 struct platform_device *pdev = hisi_hba->pdev;
1047 struct device *dev = &pdev->dev;
1048 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1049
1050 spin_lock_init(&hisi_hba->lock);
1051 for (i = 0; i < hisi_hba->n_phy; i++) {
1052 hisi_sas_phy_init(hisi_hba, i);
1053 hisi_hba->port[i].port_attached = 0;
1054 hisi_hba->port[i].id = -1;
1055 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1056 }
1057
1058 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1059 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1060 hisi_hba->devices[i].device_id = i;
1061 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1062 }
1063
1064 for (i = 0; i < hisi_hba->queue_count; i++) {
1065 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1066
1067 /* Completion queue structure */
1068 cq->id = i;
1069 cq->hisi_hba = hisi_hba;
1070
1071 /* Delivery queue */
1072 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1073 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1074 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1075 if (!hisi_hba->cmd_hdr[i])
1076 goto err_out;
1077 memset(hisi_hba->cmd_hdr[i], 0, s);
1078
1079 /* Completion queue */
1080 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1081 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1082 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1083 if (!hisi_hba->complete_hdr[i])
1084 goto err_out;
1085 memset(hisi_hba->complete_hdr[i], 0, s);
1086 }
1087
1088 s = HISI_SAS_STATUS_BUF_SZ;
1089 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1090 dev, s, 16, 0);
1091 if (!hisi_hba->status_buffer_pool)
1092 goto err_out;
1093
1094 s = HISI_SAS_COMMAND_TABLE_SZ;
1095 hisi_hba->command_table_pool = dma_pool_create("command_table",
1096 dev, s, 16, 0);
1097 if (!hisi_hba->command_table_pool)
1098 goto err_out;
1099
1100 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1101 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1102 GFP_KERNEL);
1103 if (!hisi_hba->itct)
1104 goto err_out;
1105
1106 memset(hisi_hba->itct, 0, s);
1107
1108 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1109 sizeof(struct hisi_sas_slot),
1110 GFP_KERNEL);
1111 if (!hisi_hba->slot_info)
1112 goto err_out;
1113
1114 s = max_command_entries * sizeof(struct hisi_sas_iost);
1115 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1116 GFP_KERNEL);
1117 if (!hisi_hba->iost)
1118 goto err_out;
1119
1120 memset(hisi_hba->iost, 0, s);
1121
1122 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1123 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1124 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1125 if (!hisi_hba->breakpoint)
1126 goto err_out;
1127
1128 memset(hisi_hba->breakpoint, 0, s);
1129
1130 hisi_hba->slot_index_count = max_command_entries;
1131 s = hisi_hba->slot_index_count / sizeof(unsigned long);
1132 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1133 if (!hisi_hba->slot_index_tags)
1134 goto err_out;
1135
1136 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1137 sizeof(struct hisi_sas_sge_page), 16, 0);
1138 if (!hisi_hba->sge_page_pool)
1139 goto err_out;
1140
1141 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1142 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1143 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1144 if (!hisi_hba->initial_fis)
1145 goto err_out;
1146 memset(hisi_hba->initial_fis, 0, s);
1147
1148 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1149 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1150 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1151 if (!hisi_hba->sata_breakpoint)
1152 goto err_out;
1153 memset(hisi_hba->sata_breakpoint, 0, s);
1154
1155 hisi_sas_slot_index_init(hisi_hba);
1156
1157 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1158 if (!hisi_hba->wq) {
1159 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1160 goto err_out;
1161 }
1162
1163 return 0;
1164 err_out:
1165 return -ENOMEM;
1166 }
1167
1168 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1169 {
1170 struct device *dev = &hisi_hba->pdev->dev;
1171 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1172
1173 for (i = 0; i < hisi_hba->queue_count; i++) {
1174 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1175 if (hisi_hba->cmd_hdr[i])
1176 dma_free_coherent(dev, s,
1177 hisi_hba->cmd_hdr[i],
1178 hisi_hba->cmd_hdr_dma[i]);
1179
1180 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1181 if (hisi_hba->complete_hdr[i])
1182 dma_free_coherent(dev, s,
1183 hisi_hba->complete_hdr[i],
1184 hisi_hba->complete_hdr_dma[i]);
1185 }
1186
1187 dma_pool_destroy(hisi_hba->status_buffer_pool);
1188 dma_pool_destroy(hisi_hba->command_table_pool);
1189 dma_pool_destroy(hisi_hba->sge_page_pool);
1190
1191 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1192 if (hisi_hba->itct)
1193 dma_free_coherent(dev, s,
1194 hisi_hba->itct, hisi_hba->itct_dma);
1195
1196 s = max_command_entries * sizeof(struct hisi_sas_iost);
1197 if (hisi_hba->iost)
1198 dma_free_coherent(dev, s,
1199 hisi_hba->iost, hisi_hba->iost_dma);
1200
1201 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1202 if (hisi_hba->breakpoint)
1203 dma_free_coherent(dev, s,
1204 hisi_hba->breakpoint,
1205 hisi_hba->breakpoint_dma);
1206
1207
1208 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1209 if (hisi_hba->initial_fis)
1210 dma_free_coherent(dev, s,
1211 hisi_hba->initial_fis,
1212 hisi_hba->initial_fis_dma);
1213
1214 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1215 if (hisi_hba->sata_breakpoint)
1216 dma_free_coherent(dev, s,
1217 hisi_hba->sata_breakpoint,
1218 hisi_hba->sata_breakpoint_dma);
1219
1220 if (hisi_hba->wq)
1221 destroy_workqueue(hisi_hba->wq);
1222 }
1223
1224 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1225 const struct hisi_sas_hw *hw)
1226 {
1227 struct resource *res;
1228 struct Scsi_Host *shost;
1229 struct hisi_hba *hisi_hba;
1230 struct device *dev = &pdev->dev;
1231 struct device_node *np = pdev->dev.of_node;
1232
1233 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1234 if (!shost)
1235 goto err_out;
1236 hisi_hba = shost_priv(shost);
1237
1238 hisi_hba->hw = hw;
1239 hisi_hba->pdev = pdev;
1240 hisi_hba->shost = shost;
1241 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1242
1243 init_timer(&hisi_hba->timer);
1244
1245 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1246 SAS_ADDR_SIZE))
1247 goto err_out;
1248
1249 if (np) {
1250 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1251 "hisilicon,sas-syscon");
1252 if (IS_ERR(hisi_hba->ctrl))
1253 goto err_out;
1254
1255 if (device_property_read_u32(dev, "ctrl-reset-reg",
1256 &hisi_hba->ctrl_reset_reg))
1257 goto err_out;
1258
1259 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1260 &hisi_hba->ctrl_reset_sts_reg))
1261 goto err_out;
1262
1263 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1264 &hisi_hba->ctrl_clock_ena_reg))
1265 goto err_out;
1266 }
1267
1268 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1269 goto err_out;
1270
1271 if (device_property_read_u32(dev, "queue-count",
1272 &hisi_hba->queue_count))
1273 goto err_out;
1274
1275 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1276 hisi_hba->regs = devm_ioremap_resource(dev, res);
1277 if (IS_ERR(hisi_hba->regs))
1278 goto err_out;
1279
1280 if (hisi_sas_alloc(hisi_hba, shost)) {
1281 hisi_sas_free(hisi_hba);
1282 goto err_out;
1283 }
1284
1285 return shost;
1286 err_out:
1287 dev_err(dev, "shost alloc failed\n");
1288 return NULL;
1289 }
1290
1291 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1292 {
1293 int i;
1294
1295 for (i = 0; i < hisi_hba->n_phy; i++)
1296 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1297 hisi_hba->sas_addr,
1298 SAS_ADDR_SIZE);
1299 }
1300
1301 int hisi_sas_probe(struct platform_device *pdev,
1302 const struct hisi_sas_hw *hw)
1303 {
1304 struct Scsi_Host *shost;
1305 struct hisi_hba *hisi_hba;
1306 struct device *dev = &pdev->dev;
1307 struct asd_sas_phy **arr_phy;
1308 struct asd_sas_port **arr_port;
1309 struct sas_ha_struct *sha;
1310 int rc, phy_nr, port_nr, i;
1311
1312 shost = hisi_sas_shost_alloc(pdev, hw);
1313 if (!shost) {
1314 rc = -ENOMEM;
1315 goto err_out_ha;
1316 }
1317
1318 sha = SHOST_TO_SAS_HA(shost);
1319 hisi_hba = shost_priv(shost);
1320 platform_set_drvdata(pdev, sha);
1321
1322 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1323 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1324 dev_err(dev, "No usable DMA addressing method\n");
1325 rc = -EIO;
1326 goto err_out_ha;
1327 }
1328
1329 phy_nr = port_nr = hisi_hba->n_phy;
1330
1331 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1332 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1333 if (!arr_phy || !arr_port)
1334 return -ENOMEM;
1335
1336 sha->sas_phy = arr_phy;
1337 sha->sas_port = arr_port;
1338 sha->core.shost = shost;
1339 sha->lldd_ha = hisi_hba;
1340
1341 shost->transportt = hisi_sas_stt;
1342 shost->max_id = HISI_SAS_MAX_DEVICES;
1343 shost->max_lun = ~0;
1344 shost->max_channel = 1;
1345 shost->max_cmd_len = 16;
1346 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1347 shost->can_queue = hisi_hba->hw->max_command_entries;
1348 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1349
1350 sha->sas_ha_name = DRV_NAME;
1351 sha->dev = &hisi_hba->pdev->dev;
1352 sha->lldd_module = THIS_MODULE;
1353 sha->sas_addr = &hisi_hba->sas_addr[0];
1354 sha->num_phys = hisi_hba->n_phy;
1355 sha->core.shost = hisi_hba->shost;
1356
1357 for (i = 0; i < hisi_hba->n_phy; i++) {
1358 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1359 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1360 }
1361
1362 hisi_sas_init_add(hisi_hba);
1363
1364 rc = hisi_hba->hw->hw_init(hisi_hba);
1365 if (rc)
1366 goto err_out_ha;
1367
1368 rc = scsi_add_host(shost, &pdev->dev);
1369 if (rc)
1370 goto err_out_ha;
1371
1372 rc = sas_register_ha(sha);
1373 if (rc)
1374 goto err_out_register_ha;
1375
1376 scsi_scan_host(shost);
1377
1378 return 0;
1379
1380 err_out_register_ha:
1381 scsi_remove_host(shost);
1382 err_out_ha:
1383 kfree(shost);
1384 return rc;
1385 }
1386 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1387
1388 int hisi_sas_remove(struct platform_device *pdev)
1389 {
1390 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1391 struct hisi_hba *hisi_hba = sha->lldd_ha;
1392
1393 scsi_remove_host(sha->core.shost);
1394 sas_unregister_ha(sha);
1395 sas_remove_host(sha->core.shost);
1396
1397 hisi_sas_free(hisi_hba);
1398 return 0;
1399 }
1400 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1401
1402 static __init int hisi_sas_init(void)
1403 {
1404 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1405
1406 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1407 if (!hisi_sas_stt)
1408 return -ENOMEM;
1409
1410 return 0;
1411 }
1412
1413 static __exit void hisi_sas_exit(void)
1414 {
1415 sas_release_transport(hisi_sas_stt);
1416 }
1417
1418 module_init(hisi_sas_init);
1419 module_exit(hisi_sas_exit);
1420
1421 MODULE_VERSION(DRV_VERSION);
1422 MODULE_LICENSE("GPL");
1423 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1424 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1425 MODULE_ALIAS("platform:" DRV_NAME);
Linux kernel - Deliverables
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