?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'mmc-v4.6-rc4' of git://git.linaro.org/people/ulf.hansson/mmc
[linux/fpc-iii.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
blob097ab4f27a6ba8ca4f782007ef3571c169b9ea13
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 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
231 if (rc)
232 goto err_out;
233 rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
234 &dlvry_queue_slot);
235 if (rc)
236 goto err_out_tag;
237
238 slot = &hisi_hba->slot_info[slot_idx];
239 memset(slot, 0, sizeof(struct hisi_sas_slot));
240
241 slot->idx = slot_idx;
242 slot->n_elem = n_elem;
243 slot->dlvry_queue = dlvry_queue;
244 slot->dlvry_queue_slot = dlvry_queue_slot;
245 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
246 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
247 slot->task = task;
248 slot->port = port;
249 task->lldd_task = slot;
250 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
251
252 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
253 GFP_ATOMIC,
254 &slot->status_buffer_dma);
255 if (!slot->status_buffer) {
256 rc = -ENOMEM;
257 goto err_out_slot_buf;
258 }
259 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
260
261 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
262 GFP_ATOMIC,
263 &slot->command_table_dma);
264 if (!slot->command_table) {
265 rc = -ENOMEM;
266 goto err_out_status_buf;
267 }
268 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
269 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
270
271 switch (task->task_proto) {
272 case SAS_PROTOCOL_SMP:
273 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
274 break;
275 case SAS_PROTOCOL_SSP:
276 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
277 break;
278 case SAS_PROTOCOL_SATA:
279 case SAS_PROTOCOL_STP:
280 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
281 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
282 break;
283 default:
284 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
285 task->task_proto);
286 rc = -EINVAL;
287 break;
288 }
289
290 if (rc) {
291 dev_err(dev, "task prep: rc = 0x%x\n", rc);
292 if (slot->sge_page)
293 goto err_out_sge;
294 goto err_out_command_table;
295 }
296
297 list_add_tail(&slot->entry, &port->list);
298 spin_lock(&task->task_state_lock);
299 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
300 spin_unlock(&task->task_state_lock);
301
302 hisi_hba->slot_prep = slot;
303
304 sas_dev->running_req++;
305 ++(*pass);
306
307 return 0;
308
309 err_out_sge:
310 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
311 slot->sge_page_dma);
312 err_out_command_table:
313 dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
314 slot->command_table_dma);
315 err_out_status_buf:
316 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
317 slot->status_buffer_dma);
318 err_out_slot_buf:
319 /* Nothing to be done */
320 err_out_tag:
321 hisi_sas_slot_index_free(hisi_hba, slot_idx);
322 err_out:
323 dev_err(dev, "task prep: failed[%d]!\n", rc);
324 if (!sas_protocol_ata(task->task_proto))
325 if (n_elem)
326 dma_unmap_sg(dev, task->scatter, n_elem,
327 task->data_dir);
328 prep_out:
329 return rc;
330 }
331
332 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
333 int is_tmf, struct hisi_sas_tmf_task *tmf)
334 {
335 u32 rc;
336 u32 pass = 0;
337 unsigned long flags;
338 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
339 struct device *dev = &hisi_hba->pdev->dev;
340
341 /* protect task_prep and start_delivery sequence */
342 spin_lock_irqsave(&hisi_hba->lock, flags);
343 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
344 if (rc)
345 dev_err(dev, "task exec: failed[%d]!\n", rc);
346
347 if (likely(pass))
348 hisi_hba->hw->start_delivery(hisi_hba);
349 spin_unlock_irqrestore(&hisi_hba->lock, flags);
350
351 return rc;
352 }
353
354 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
355 {
356 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
357 struct asd_sas_phy *sas_phy = &phy->sas_phy;
358 struct sas_ha_struct *sas_ha;
359
360 if (!phy->phy_attached)
361 return;
362
363 sas_ha = &hisi_hba->sha;
364 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
365
366 if (sas_phy->phy) {
367 struct sas_phy *sphy = sas_phy->phy;
368
369 sphy->negotiated_linkrate = sas_phy->linkrate;
370 sphy->minimum_linkrate = phy->minimum_linkrate;
371 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
372 sphy->maximum_linkrate = phy->maximum_linkrate;
373 }
374
375 if (phy->phy_type & PORT_TYPE_SAS) {
376 struct sas_identify_frame *id;
377
378 id = (struct sas_identify_frame *)phy->frame_rcvd;
379 id->dev_type = phy->identify.device_type;
380 id->initiator_bits = SAS_PROTOCOL_ALL;
381 id->target_bits = phy->identify.target_port_protocols;
382 } else if (phy->phy_type & PORT_TYPE_SATA) {
383 /*Nothing*/
384 }
385
386 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
387 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
388 }
389
390 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
391 {
392 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
393 struct hisi_sas_device *sas_dev = NULL;
394 int i;
395
396 spin_lock(&hisi_hba->lock);
397 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
398 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
399 hisi_hba->devices[i].device_id = i;
400 sas_dev = &hisi_hba->devices[i];
401 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
402 sas_dev->dev_type = device->dev_type;
403 sas_dev->hisi_hba = hisi_hba;
404 sas_dev->sas_device = device;
405 break;
406 }
407 }
408 spin_unlock(&hisi_hba->lock);
409
410 return sas_dev;
411 }
412
413 static int hisi_sas_dev_found(struct domain_device *device)
414 {
415 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
416 struct domain_device *parent_dev = device->parent;
417 struct hisi_sas_device *sas_dev;
418 struct device *dev = &hisi_hba->pdev->dev;
419
420 sas_dev = hisi_sas_alloc_dev(device);
421 if (!sas_dev) {
422 dev_err(dev, "fail alloc dev: max support %d devices\n",
423 HISI_SAS_MAX_DEVICES);
424 return -EINVAL;
425 }
426
427 device->lldd_dev = sas_dev;
428 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
429
430 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
431 int phy_no;
432 u8 phy_num = parent_dev->ex_dev.num_phys;
433 struct ex_phy *phy;
434
435 for (phy_no = 0; phy_no < phy_num; phy_no++) {
436 phy = &parent_dev->ex_dev.ex_phy[phy_no];
437 if (SAS_ADDR(phy->attached_sas_addr) ==
438 SAS_ADDR(device->sas_addr)) {
439 sas_dev->attached_phy = phy_no;
440 break;
441 }
442 }
443
444 if (phy_no == phy_num) {
445 dev_info(dev, "dev found: no attached "
446 "dev:%016llx at ex:%016llx\n",
447 SAS_ADDR(device->sas_addr),
448 SAS_ADDR(parent_dev->sas_addr));
449 return -EINVAL;
450 }
451 }
452
453 return 0;
454 }
455
456 static int hisi_sas_slave_configure(struct scsi_device *sdev)
457 {
458 struct domain_device *dev = sdev_to_domain_dev(sdev);
459 int ret = sas_slave_configure(sdev);
460
461 if (ret)
462 return ret;
463 if (!dev_is_sata(dev))
464 sas_change_queue_depth(sdev, 64);
465
466 return 0;
467 }
468
469 static void hisi_sas_scan_start(struct Scsi_Host *shost)
470 {
471 struct hisi_hba *hisi_hba = shost_priv(shost);
472 int i;
473
474 for (i = 0; i < hisi_hba->n_phy; ++i)
475 hisi_sas_bytes_dmaed(hisi_hba, i);
476
477 hisi_hba->scan_finished = 1;
478 }
479
480 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
481 {
482 struct hisi_hba *hisi_hba = shost_priv(shost);
483 struct sas_ha_struct *sha = &hisi_hba->sha;
484
485 if (hisi_hba->scan_finished == 0)
486 return 0;
487
488 sas_drain_work(sha);
489 return 1;
490 }
491
492 static void hisi_sas_phyup_work(struct work_struct *work)
493 {
494 struct hisi_sas_phy *phy =
495 container_of(work, struct hisi_sas_phy, phyup_ws);
496 struct hisi_hba *hisi_hba = phy->hisi_hba;
497 struct asd_sas_phy *sas_phy = &phy->sas_phy;
498 int phy_no = sas_phy->id;
499
500 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
501 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
502 }
503
504 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
505 {
506 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
507 struct asd_sas_phy *sas_phy = &phy->sas_phy;
508
509 phy->hisi_hba = hisi_hba;
510 phy->port = NULL;
511 init_timer(&phy->timer);
512 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
513 sas_phy->class = SAS;
514 sas_phy->iproto = SAS_PROTOCOL_ALL;
515 sas_phy->tproto = 0;
516 sas_phy->type = PHY_TYPE_PHYSICAL;
517 sas_phy->role = PHY_ROLE_INITIATOR;
518 sas_phy->oob_mode = OOB_NOT_CONNECTED;
519 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
520 sas_phy->id = phy_no;
521 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
522 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
523 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
524 sas_phy->lldd_phy = phy;
525
526 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
527 }
528
529 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
530 {
531 struct sas_ha_struct *sas_ha = sas_phy->ha;
532 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
533 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
534 struct asd_sas_port *sas_port = sas_phy->port;
535 struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
536 unsigned long flags;
537
538 if (!sas_port)
539 return;
540
541 spin_lock_irqsave(&hisi_hba->lock, flags);
542 port->port_attached = 1;
543 port->id = phy->port_id;
544 phy->port = port;
545 sas_port->lldd_port = port;
546 spin_unlock_irqrestore(&hisi_hba->lock, flags);
547 }
548
549 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
550 struct domain_device *device)
551 {
552 struct hisi_sas_phy *phy;
553 struct hisi_sas_port *port;
554 struct hisi_sas_slot *slot, *slot2;
555 struct device *dev = &hisi_hba->pdev->dev;
556
557 phy = &hisi_hba->phy[phy_no];
558 port = phy->port;
559 if (!port)
560 return;
561
562 list_for_each_entry_safe(slot, slot2, &port->list, entry) {
563 struct sas_task *task;
564
565 task = slot->task;
566 if (device && task->dev != device)
567 continue;
568
569 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
570 slot->dlvry_queue, slot->dlvry_queue_slot, task);
571 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
572 }
573 }
574
575 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
576 {
577 struct domain_device *device;
578 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
579 struct asd_sas_port *sas_port = sas_phy->port;
580
581 list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
582 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
583 }
584
585 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
586 struct domain_device *device)
587 {
588 struct asd_sas_port *port = device->port;
589 struct asd_sas_phy *sas_phy;
590
591 list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
592 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
593 }
594
595 static void hisi_sas_dev_gone(struct domain_device *device)
596 {
597 struct hisi_sas_device *sas_dev = device->lldd_dev;
598 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
599 struct device *dev = &hisi_hba->pdev->dev;
600 u64 dev_id = sas_dev->device_id;
601
602 dev_info(dev, "found dev[%lld:%x] is gone\n",
603 sas_dev->device_id, sas_dev->dev_type);
604
605 hisi_hba->hw->free_device(hisi_hba, sas_dev);
606 device->lldd_dev = NULL;
607 memset(sas_dev, 0, sizeof(*sas_dev));
608 sas_dev->device_id = dev_id;
609 sas_dev->dev_type = SAS_PHY_UNUSED;
610 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
611 }
612
613 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
614 {
615 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
616 }
617
618 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
619 void *funcdata)
620 {
621 struct sas_ha_struct *sas_ha = sas_phy->ha;
622 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
623 int phy_no = sas_phy->id;
624
625 switch (func) {
626 case PHY_FUNC_HARD_RESET:
627 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
628 break;
629
630 case PHY_FUNC_LINK_RESET:
631 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
632 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
633 break;
634
635 case PHY_FUNC_DISABLE:
636 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
637 break;
638
639 case PHY_FUNC_SET_LINK_RATE:
640 case PHY_FUNC_RELEASE_SPINUP_HOLD:
641 default:
642 return -EOPNOTSUPP;
643 }
644 return 0;
645 }
646
647 static void hisi_sas_task_done(struct sas_task *task)
648 {
649 if (!del_timer(&task->slow_task->timer))
650 return;
651 complete(&task->slow_task->completion);
652 }
653
654 static void hisi_sas_tmf_timedout(unsigned long data)
655 {
656 struct sas_task *task = (struct sas_task *)data;
657
658 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
659 complete(&task->slow_task->completion);
660 }
661
662 #define TASK_TIMEOUT 20
663 #define TASK_RETRY 3
664 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
665 void *parameter, u32 para_len,
666 struct hisi_sas_tmf_task *tmf)
667 {
668 struct hisi_sas_device *sas_dev = device->lldd_dev;
669 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
670 struct device *dev = &hisi_hba->pdev->dev;
671 struct sas_task *task;
672 int res, retry;
673
674 for (retry = 0; retry < TASK_RETRY; retry++) {
675 task = sas_alloc_slow_task(GFP_KERNEL);
676 if (!task)
677 return -ENOMEM;
678
679 task->dev = device;
680 task->task_proto = device->tproto;
681
682 memcpy(&task->ssp_task, parameter, para_len);
683 task->task_done = hisi_sas_task_done;
684
685 task->slow_task->timer.data = (unsigned long) task;
686 task->slow_task->timer.function = hisi_sas_tmf_timedout;
687 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
688 add_timer(&task->slow_task->timer);
689
690 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
691
692 if (res) {
693 del_timer(&task->slow_task->timer);
694 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
695 res);
696 goto ex_err;
697 }
698
699 wait_for_completion(&task->slow_task->completion);
700 res = TMF_RESP_FUNC_FAILED;
701 /* Even TMF timed out, return direct. */
702 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
703 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
704 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
705 tmf->tag_of_task_to_be_managed);
706 if (task->lldd_task) {
707 struct hisi_sas_slot *slot =
708 task->lldd_task;
709
710 hisi_sas_slot_task_free(hisi_hba,
711 task, slot);
712 }
713
714 goto ex_err;
715 }
716 }
717
718 if (task->task_status.resp == SAS_TASK_COMPLETE &&
719 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
720 res = TMF_RESP_FUNC_COMPLETE;
721 break;
722 }
723
724 if (task->task_status.resp == SAS_TASK_COMPLETE &&
725 task->task_status.stat == SAS_DATA_UNDERRUN) {
726 /* no error, but return the number of bytes of
727 * underrun
728 */
729 dev_warn(dev, "abort tmf: task to dev %016llx "
730 "resp: 0x%x sts 0x%x underrun\n",
731 SAS_ADDR(device->sas_addr),
732 task->task_status.resp,
733 task->task_status.stat);
734 res = task->task_status.residual;
735 break;
736 }
737
738 if (task->task_status.resp == SAS_TASK_COMPLETE &&
739 task->task_status.stat == SAS_DATA_OVERRUN) {
740 dev_warn(dev, "abort tmf: blocked task error\n");
741 res = -EMSGSIZE;
742 break;
743 }
744
745 dev_warn(dev, "abort tmf: task to dev "
746 "%016llx resp: 0x%x status 0x%x\n",
747 SAS_ADDR(device->sas_addr), task->task_status.resp,
748 task->task_status.stat);
749 sas_free_task(task);
750 task = NULL;
751 }
752 ex_err:
753 WARN_ON(retry == TASK_RETRY);
754 sas_free_task(task);
755 return res;
756 }
757
758 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
759 u8 *lun, struct hisi_sas_tmf_task *tmf)
760 {
761 struct sas_ssp_task ssp_task;
762
763 if (!(device->tproto & SAS_PROTOCOL_SSP))
764 return TMF_RESP_FUNC_ESUPP;
765
766 memcpy(ssp_task.LUN, lun, 8);
767
768 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
769 sizeof(ssp_task), tmf);
770 }
771
772 static int hisi_sas_abort_task(struct sas_task *task)
773 {
774 struct scsi_lun lun;
775 struct hisi_sas_tmf_task tmf_task;
776 struct domain_device *device = task->dev;
777 struct hisi_sas_device *sas_dev = device->lldd_dev;
778 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
779 struct device *dev = &hisi_hba->pdev->dev;
780 int rc = TMF_RESP_FUNC_FAILED;
781 unsigned long flags;
782
783 if (!sas_dev) {
784 dev_warn(dev, "Device has been removed\n");
785 return TMF_RESP_FUNC_FAILED;
786 }
787
788 spin_lock_irqsave(&task->task_state_lock, flags);
789 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
790 spin_unlock_irqrestore(&task->task_state_lock, flags);
791 rc = TMF_RESP_FUNC_COMPLETE;
792 goto out;
793 }
794
795 spin_unlock_irqrestore(&task->task_state_lock, flags);
796 sas_dev->dev_status = HISI_SAS_DEV_EH;
797 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
798 struct scsi_cmnd *cmnd = task->uldd_task;
799 struct hisi_sas_slot *slot = task->lldd_task;
800 u32 tag = slot->idx;
801
802 int_to_scsilun(cmnd->device->lun, &lun);
803 tmf_task.tmf = TMF_ABORT_TASK;
804 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
805
806 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
807 &tmf_task);
808
809 /* if successful, clear the task and callback forwards.*/
810 if (rc == TMF_RESP_FUNC_COMPLETE) {
811 if (task->lldd_task) {
812 struct hisi_sas_slot *slot;
813
814 slot = &hisi_hba->slot_info
815 [tmf_task.tag_of_task_to_be_managed];
816 spin_lock_irqsave(&hisi_hba->lock, flags);
817 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
818 spin_unlock_irqrestore(&hisi_hba->lock, flags);
819 }
820 }
821
822 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
823 task->task_proto & SAS_PROTOCOL_STP) {
824 if (task->dev->dev_type == SAS_SATA_DEV) {
825 struct hisi_slot_info *slot = task->lldd_task;
826
827 dev_notice(dev, "abort task: hba=%p task=%p slot=%p\n",
828 hisi_hba, task, slot);
829 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
830 rc = TMF_RESP_FUNC_COMPLETE;
831 goto out;
832 }
833
834 }
835
836 out:
837 if (rc != TMF_RESP_FUNC_COMPLETE)
838 dev_notice(dev, "abort task: rc=%d\n", rc);
839 return rc;
840 }
841
842 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
843 {
844 struct hisi_sas_tmf_task tmf_task;
845 int rc = TMF_RESP_FUNC_FAILED;
846
847 tmf_task.tmf = TMF_ABORT_TASK_SET;
848 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
849
850 return rc;
851 }
852
853 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
854 {
855 int rc = TMF_RESP_FUNC_FAILED;
856 struct hisi_sas_tmf_task tmf_task;
857
858 tmf_task.tmf = TMF_CLEAR_ACA;
859 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
860
861 return rc;
862 }
863
864 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
865 {
866 struct sas_phy *phy = sas_get_local_phy(device);
867 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
868 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
869 rc = sas_phy_reset(phy, reset_type);
870 sas_put_local_phy(phy);
871 msleep(2000);
872 return rc;
873 }
874
875 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
876 {
877 struct hisi_sas_device *sas_dev = device->lldd_dev;
878 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
879 unsigned long flags;
880 int rc = TMF_RESP_FUNC_FAILED;
881
882 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
883 return TMF_RESP_FUNC_FAILED;
884 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
885
886 rc = hisi_sas_debug_I_T_nexus_reset(device);
887
888 spin_lock_irqsave(&hisi_hba->lock, flags);
889 hisi_sas_release_task(hisi_hba, device);
890 spin_unlock_irqrestore(&hisi_hba->lock, flags);
891
892 return 0;
893 }
894
895 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
896 {
897 struct hisi_sas_tmf_task tmf_task;
898 struct hisi_sas_device *sas_dev = device->lldd_dev;
899 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
900 struct device *dev = &hisi_hba->pdev->dev;
901 unsigned long flags;
902 int rc = TMF_RESP_FUNC_FAILED;
903
904 tmf_task.tmf = TMF_LU_RESET;
905 sas_dev->dev_status = HISI_SAS_DEV_EH;
906 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
907 if (rc == TMF_RESP_FUNC_COMPLETE) {
908 spin_lock_irqsave(&hisi_hba->lock, flags);
909 hisi_sas_release_task(hisi_hba, device);
910 spin_unlock_irqrestore(&hisi_hba->lock, flags);
911 }
912
913 /* If failed, fall-through I_T_Nexus reset */
914 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
915 sas_dev->device_id, rc);
916 return rc;
917 }
918
919 static int hisi_sas_query_task(struct sas_task *task)
920 {
921 struct scsi_lun lun;
922 struct hisi_sas_tmf_task tmf_task;
923 int rc = TMF_RESP_FUNC_FAILED;
924
925 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
926 struct scsi_cmnd *cmnd = task->uldd_task;
927 struct domain_device *device = task->dev;
928 struct hisi_sas_slot *slot = task->lldd_task;
929 u32 tag = slot->idx;
930
931 int_to_scsilun(cmnd->device->lun, &lun);
932 tmf_task.tmf = TMF_QUERY_TASK;
933 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
934
935 rc = hisi_sas_debug_issue_ssp_tmf(device,
936 lun.scsi_lun,
937 &tmf_task);
938 switch (rc) {
939 /* The task is still in Lun, release it then */
940 case TMF_RESP_FUNC_SUCC:
941 /* The task is not in Lun or failed, reset the phy */
942 case TMF_RESP_FUNC_FAILED:
943 case TMF_RESP_FUNC_COMPLETE:
944 break;
945 }
946 }
947 return rc;
948 }
949
950 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
951 {
952 hisi_sas_port_notify_formed(sas_phy);
953 }
954
955 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
956 {
957 hisi_sas_port_notify_deformed(sas_phy);
958 }
959
960 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
961 {
962 phy->phy_attached = 0;
963 phy->phy_type = 0;
964 phy->port = NULL;
965 }
966
967 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
968 {
969 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
970 struct asd_sas_phy *sas_phy = &phy->sas_phy;
971 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
972
973 if (rdy) {
974 /* Phy down but ready */
975 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
976 hisi_sas_port_notify_formed(sas_phy);
977 } else {
978 struct hisi_sas_port *port = phy->port;
979
980 /* Phy down and not ready */
981 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
982 sas_phy_disconnected(sas_phy);
983
984 if (port) {
985 if (phy->phy_type & PORT_TYPE_SAS) {
986 int port_id = port->id;
987
988 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
989 port_id))
990 port->port_attached = 0;
991 } else if (phy->phy_type & PORT_TYPE_SATA)
992 port->port_attached = 0;
993 }
994 hisi_sas_phy_disconnected(phy);
995 }
996 }
997 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
998
999 static struct scsi_transport_template *hisi_sas_stt;
1000
1001 static struct scsi_host_template hisi_sas_sht = {
1002 .module = THIS_MODULE,
1003 .name = DRV_NAME,
1004 .queuecommand = sas_queuecommand,
1005 .target_alloc = sas_target_alloc,
1006 .slave_configure = hisi_sas_slave_configure,
1007 .scan_finished = hisi_sas_scan_finished,
1008 .scan_start = hisi_sas_scan_start,
1009 .change_queue_depth = sas_change_queue_depth,
1010 .bios_param = sas_bios_param,
1011 .can_queue = 1,
1012 .this_id = -1,
1013 .sg_tablesize = SG_ALL,
1014 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1015 .use_clustering = ENABLE_CLUSTERING,
1016 .eh_device_reset_handler = sas_eh_device_reset_handler,
1017 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1018 .target_destroy = sas_target_destroy,
1019 .ioctl = sas_ioctl,
1020 };
1021
1022 static struct sas_domain_function_template hisi_sas_transport_ops = {
1023 .lldd_dev_found = hisi_sas_dev_found,
1024 .lldd_dev_gone = hisi_sas_dev_gone,
1025 .lldd_execute_task = hisi_sas_queue_command,
1026 .lldd_control_phy = hisi_sas_control_phy,
1027 .lldd_abort_task = hisi_sas_abort_task,
1028 .lldd_abort_task_set = hisi_sas_abort_task_set,
1029 .lldd_clear_aca = hisi_sas_clear_aca,
1030 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1031 .lldd_lu_reset = hisi_sas_lu_reset,
1032 .lldd_query_task = hisi_sas_query_task,
1033 .lldd_port_formed = hisi_sas_port_formed,
1034 .lldd_port_deformed = hisi_sas_port_deformed,
1035 };
1036
1037 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1038 {
1039 struct platform_device *pdev = hisi_hba->pdev;
1040 struct device *dev = &pdev->dev;
1041 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1042
1043 spin_lock_init(&hisi_hba->lock);
1044 for (i = 0; i < hisi_hba->n_phy; i++) {
1045 hisi_sas_phy_init(hisi_hba, i);
1046 hisi_hba->port[i].port_attached = 0;
1047 hisi_hba->port[i].id = -1;
1048 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1049 }
1050
1051 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1052 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1053 hisi_hba->devices[i].device_id = i;
1054 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1055 }
1056
1057 for (i = 0; i < hisi_hba->queue_count; i++) {
1058 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1059
1060 /* Completion queue structure */
1061 cq->id = i;
1062 cq->hisi_hba = hisi_hba;
1063
1064 /* Delivery queue */
1065 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1066 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1067 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1068 if (!hisi_hba->cmd_hdr[i])
1069 goto err_out;
1070 memset(hisi_hba->cmd_hdr[i], 0, s);
1071
1072 /* Completion queue */
1073 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1074 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1075 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1076 if (!hisi_hba->complete_hdr[i])
1077 goto err_out;
1078 memset(hisi_hba->complete_hdr[i], 0, s);
1079 }
1080
1081 s = HISI_SAS_STATUS_BUF_SZ;
1082 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1083 dev, s, 16, 0);
1084 if (!hisi_hba->status_buffer_pool)
1085 goto err_out;
1086
1087 s = HISI_SAS_COMMAND_TABLE_SZ;
1088 hisi_hba->command_table_pool = dma_pool_create("command_table",
1089 dev, s, 16, 0);
1090 if (!hisi_hba->command_table_pool)
1091 goto err_out;
1092
1093 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1094 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1095 GFP_KERNEL);
1096 if (!hisi_hba->itct)
1097 goto err_out;
1098
1099 memset(hisi_hba->itct, 0, s);
1100
1101 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1102 sizeof(struct hisi_sas_slot),
1103 GFP_KERNEL);
1104 if (!hisi_hba->slot_info)
1105 goto err_out;
1106
1107 s = max_command_entries * sizeof(struct hisi_sas_iost);
1108 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1109 GFP_KERNEL);
1110 if (!hisi_hba->iost)
1111 goto err_out;
1112
1113 memset(hisi_hba->iost, 0, s);
1114
1115 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1116 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1117 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1118 if (!hisi_hba->breakpoint)
1119 goto err_out;
1120
1121 memset(hisi_hba->breakpoint, 0, s);
1122
1123 hisi_hba->slot_index_count = max_command_entries;
1124 s = hisi_hba->slot_index_count / sizeof(unsigned long);
1125 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1126 if (!hisi_hba->slot_index_tags)
1127 goto err_out;
1128
1129 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1130 sizeof(struct hisi_sas_sge_page), 16, 0);
1131 if (!hisi_hba->sge_page_pool)
1132 goto err_out;
1133
1134 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1135 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1136 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1137 if (!hisi_hba->initial_fis)
1138 goto err_out;
1139 memset(hisi_hba->initial_fis, 0, s);
1140
1141 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1142 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1143 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1144 if (!hisi_hba->sata_breakpoint)
1145 goto err_out;
1146 memset(hisi_hba->sata_breakpoint, 0, s);
1147
1148 hisi_sas_slot_index_init(hisi_hba);
1149
1150 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1151 if (!hisi_hba->wq) {
1152 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1153 goto err_out;
1154 }
1155
1156 return 0;
1157 err_out:
1158 return -ENOMEM;
1159 }
1160
1161 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1162 {
1163 struct device *dev = &hisi_hba->pdev->dev;
1164 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1165
1166 for (i = 0; i < hisi_hba->queue_count; i++) {
1167 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1168 if (hisi_hba->cmd_hdr[i])
1169 dma_free_coherent(dev, s,
1170 hisi_hba->cmd_hdr[i],
1171 hisi_hba->cmd_hdr_dma[i]);
1172
1173 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1174 if (hisi_hba->complete_hdr[i])
1175 dma_free_coherent(dev, s,
1176 hisi_hba->complete_hdr[i],
1177 hisi_hba->complete_hdr_dma[i]);
1178 }
1179
1180 dma_pool_destroy(hisi_hba->status_buffer_pool);
1181 dma_pool_destroy(hisi_hba->command_table_pool);
1182 dma_pool_destroy(hisi_hba->sge_page_pool);
1183
1184 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1185 if (hisi_hba->itct)
1186 dma_free_coherent(dev, s,
1187 hisi_hba->itct, hisi_hba->itct_dma);
1188
1189 s = max_command_entries * sizeof(struct hisi_sas_iost);
1190 if (hisi_hba->iost)
1191 dma_free_coherent(dev, s,
1192 hisi_hba->iost, hisi_hba->iost_dma);
1193
1194 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1195 if (hisi_hba->breakpoint)
1196 dma_free_coherent(dev, s,
1197 hisi_hba->breakpoint,
1198 hisi_hba->breakpoint_dma);
1199
1200
1201 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1202 if (hisi_hba->initial_fis)
1203 dma_free_coherent(dev, s,
1204 hisi_hba->initial_fis,
1205 hisi_hba->initial_fis_dma);
1206
1207 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1208 if (hisi_hba->sata_breakpoint)
1209 dma_free_coherent(dev, s,
1210 hisi_hba->sata_breakpoint,
1211 hisi_hba->sata_breakpoint_dma);
1212
1213 if (hisi_hba->wq)
1214 destroy_workqueue(hisi_hba->wq);
1215 }
1216
1217 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1218 const struct hisi_sas_hw *hw)
1219 {
1220 struct resource *res;
1221 struct Scsi_Host *shost;
1222 struct hisi_hba *hisi_hba;
1223 struct device *dev = &pdev->dev;
1224 struct device_node *np = pdev->dev.of_node;
1225
1226 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1227 if (!shost)
1228 goto err_out;
1229 hisi_hba = shost_priv(shost);
1230
1231 hisi_hba->hw = hw;
1232 hisi_hba->pdev = pdev;
1233 hisi_hba->shost = shost;
1234 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1235
1236 init_timer(&hisi_hba->timer);
1237
1238 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1239 SAS_ADDR_SIZE))
1240 goto err_out;
1241
1242 if (np) {
1243 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1244 "hisilicon,sas-syscon");
1245 if (IS_ERR(hisi_hba->ctrl))
1246 goto err_out;
1247
1248 if (device_property_read_u32(dev, "ctrl-reset-reg",
1249 &hisi_hba->ctrl_reset_reg))
1250 goto err_out;
1251
1252 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1253 &hisi_hba->ctrl_reset_sts_reg))
1254 goto err_out;
1255
1256 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1257 &hisi_hba->ctrl_clock_ena_reg))
1258 goto err_out;
1259 }
1260
1261 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1262 goto err_out;
1263
1264 if (device_property_read_u32(dev, "queue-count",
1265 &hisi_hba->queue_count))
1266 goto err_out;
1267
1268 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1269 hisi_hba->regs = devm_ioremap_resource(dev, res);
1270 if (IS_ERR(hisi_hba->regs))
1271 goto err_out;
1272
1273 if (hisi_sas_alloc(hisi_hba, shost)) {
1274 hisi_sas_free(hisi_hba);
1275 goto err_out;
1276 }
1277
1278 return shost;
1279 err_out:
1280 dev_err(dev, "shost alloc failed\n");
1281 return NULL;
1282 }
1283
1284 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1285 {
1286 int i;
1287
1288 for (i = 0; i < hisi_hba->n_phy; i++)
1289 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1290 hisi_hba->sas_addr,
1291 SAS_ADDR_SIZE);
1292 }
1293
1294 int hisi_sas_probe(struct platform_device *pdev,
1295 const struct hisi_sas_hw *hw)
1296 {
1297 struct Scsi_Host *shost;
1298 struct hisi_hba *hisi_hba;
1299 struct device *dev = &pdev->dev;
1300 struct asd_sas_phy **arr_phy;
1301 struct asd_sas_port **arr_port;
1302 struct sas_ha_struct *sha;
1303 int rc, phy_nr, port_nr, i;
1304
1305 shost = hisi_sas_shost_alloc(pdev, hw);
1306 if (!shost) {
1307 rc = -ENOMEM;
1308 goto err_out_ha;
1309 }
1310
1311 sha = SHOST_TO_SAS_HA(shost);
1312 hisi_hba = shost_priv(shost);
1313 platform_set_drvdata(pdev, sha);
1314
1315 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1316 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1317 dev_err(dev, "No usable DMA addressing method\n");
1318 rc = -EIO;
1319 goto err_out_ha;
1320 }
1321
1322 phy_nr = port_nr = hisi_hba->n_phy;
1323
1324 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1325 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1326 if (!arr_phy || !arr_port)
1327 return -ENOMEM;
1328
1329 sha->sas_phy = arr_phy;
1330 sha->sas_port = arr_port;
1331 sha->core.shost = shost;
1332 sha->lldd_ha = hisi_hba;
1333
1334 shost->transportt = hisi_sas_stt;
1335 shost->max_id = HISI_SAS_MAX_DEVICES;
1336 shost->max_lun = ~0;
1337 shost->max_channel = 1;
1338 shost->max_cmd_len = 16;
1339 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1340 shost->can_queue = hisi_hba->hw->max_command_entries;
1341 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1342
1343 sha->sas_ha_name = DRV_NAME;
1344 sha->dev = &hisi_hba->pdev->dev;
1345 sha->lldd_module = THIS_MODULE;
1346 sha->sas_addr = &hisi_hba->sas_addr[0];
1347 sha->num_phys = hisi_hba->n_phy;
1348 sha->core.shost = hisi_hba->shost;
1349
1350 for (i = 0; i < hisi_hba->n_phy; i++) {
1351 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1352 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1353 }
1354
1355 hisi_sas_init_add(hisi_hba);
1356
1357 rc = hisi_hba->hw->hw_init(hisi_hba);
1358 if (rc)
1359 goto err_out_ha;
1360
1361 rc = scsi_add_host(shost, &pdev->dev);
1362 if (rc)
1363 goto err_out_ha;
1364
1365 rc = sas_register_ha(sha);
1366 if (rc)
1367 goto err_out_register_ha;
1368
1369 scsi_scan_host(shost);
1370
1371 return 0;
1372
1373 err_out_register_ha:
1374 scsi_remove_host(shost);
1375 err_out_ha:
1376 kfree(shost);
1377 return rc;
1378 }
1379 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1380
1381 int hisi_sas_remove(struct platform_device *pdev)
1382 {
1383 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1384 struct hisi_hba *hisi_hba = sha->lldd_ha;
1385
1386 scsi_remove_host(sha->core.shost);
1387 sas_unregister_ha(sha);
1388 sas_remove_host(sha->core.shost);
1389
1390 hisi_sas_free(hisi_hba);
1391 return 0;
1392 }
1393 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1394
1395 static __init int hisi_sas_init(void)
1396 {
1397 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1398
1399 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1400 if (!hisi_sas_stt)
1401 return -ENOMEM;
1402
1403 return 0;
1404 }
1405
1406 static __exit void hisi_sas_exit(void)
1407 {
1408 sas_release_transport(hisi_sas_stt);
1409 }
1410
1411 module_init(hisi_sas_init);
1412 module_exit(hisi_sas_exit);
1413
1414 MODULE_VERSION(DRV_VERSION);
1415 MODULE_LICENSE("GPL");
1416 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1417 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1418 MODULE_ALIAS("platform:" DRV_NAME);
Linux with added FPC-III support