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scsi: hisi_sas: alloc queue id of slot according to device id
[linux-2.6/btrfs-unstable.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
blob9f5ccc59075aad80b9b6ffab8b5c90e90d60c386
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
25 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
26 {
27 return device->port->ha->lldd_ha;
28 }
29
30 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
31 {
32 void *bitmap = hisi_hba->slot_index_tags;
33
34 clear_bit(slot_idx, bitmap);
35 }
36
37 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
38 {
39 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
40 }
41
42 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
43 {
44 void *bitmap = hisi_hba->slot_index_tags;
45
46 set_bit(slot_idx, bitmap);
47 }
48
49 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
50 {
51 unsigned int index;
52 void *bitmap = hisi_hba->slot_index_tags;
53
54 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
55 if (index >= hisi_hba->slot_index_count)
56 return -SAS_QUEUE_FULL;
57 hisi_sas_slot_index_set(hisi_hba, index);
58 *slot_idx = index;
59 return 0;
60 }
61
62 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
63 {
64 int i;
65
66 for (i = 0; i < hisi_hba->slot_index_count; ++i)
67 hisi_sas_slot_index_clear(hisi_hba, i);
68 }
69
70 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
71 struct hisi_sas_slot *slot)
72 {
73 struct device *dev = &hisi_hba->pdev->dev;
74
75 if (!slot->task)
76 return;
77
78 if (!sas_protocol_ata(task->task_proto))
79 if (slot->n_elem)
80 dma_unmap_sg(dev, task->scatter, slot->n_elem,
81 task->data_dir);
82
83 if (slot->command_table)
84 dma_pool_free(hisi_hba->command_table_pool,
85 slot->command_table, slot->command_table_dma);
86
87 if (slot->status_buffer)
88 dma_pool_free(hisi_hba->status_buffer_pool,
89 slot->status_buffer, slot->status_buffer_dma);
90
91 if (slot->sge_page)
92 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
93 slot->sge_page_dma);
94
95 list_del_init(&slot->entry);
96 task->lldd_task = NULL;
97 slot->task = NULL;
98 slot->port = NULL;
99 hisi_sas_slot_index_free(hisi_hba, slot->idx);
100 /* slot memory is fully zeroed when it is reused */
101 }
102 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
103
104 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
105 struct hisi_sas_slot *slot)
106 {
107 return hisi_hba->hw->prep_smp(hisi_hba, slot);
108 }
109
110 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
111 struct hisi_sas_slot *slot, int is_tmf,
112 struct hisi_sas_tmf_task *tmf)
113 {
114 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
115 }
116
117 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
118 struct hisi_sas_slot *slot)
119 {
120 return hisi_hba->hw->prep_stp(hisi_hba, slot);
121 }
122
123 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
124 struct hisi_sas_slot *slot,
125 int device_id, int abort_flag, int tag_to_abort)
126 {
127 return hisi_hba->hw->prep_abort(hisi_hba, slot,
128 device_id, abort_flag, tag_to_abort);
129 }
130
131 /*
132 * This function will issue an abort TMF regardless of whether the
133 * task is in the sdev or not. Then it will do the task complete
134 * cleanup and callbacks.
135 */
136 static void hisi_sas_slot_abort(struct work_struct *work)
137 {
138 struct hisi_sas_slot *abort_slot =
139 container_of(work, struct hisi_sas_slot, abort_slot);
140 struct sas_task *task = abort_slot->task;
141 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
142 struct scsi_cmnd *cmnd = task->uldd_task;
143 struct hisi_sas_tmf_task tmf_task;
144 struct domain_device *device = task->dev;
145 struct hisi_sas_device *sas_dev = device->lldd_dev;
146 struct scsi_lun lun;
147 struct device *dev = &hisi_hba->pdev->dev;
148 int tag = abort_slot->idx;
149
150 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
151 dev_err(dev, "cannot abort slot for non-ssp task\n");
152 goto out;
153 }
154
155 int_to_scsilun(cmnd->device->lun, &lun);
156 tmf_task.tmf = TMF_ABORT_TASK;
157 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
158
159 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
160 out:
161 /* Do cleanup for this task */
162 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
163 if (task->task_done)
164 task->task_done(task);
165 if (sas_dev && sas_dev->running_req)
166 sas_dev->running_req--;
167 }
168
169 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
170 int is_tmf, struct hisi_sas_tmf_task *tmf,
171 int *pass)
172 {
173 struct domain_device *device = task->dev;
174 struct hisi_sas_device *sas_dev = device->lldd_dev;
175 struct hisi_sas_port *port;
176 struct hisi_sas_slot *slot;
177 struct hisi_sas_cmd_hdr *cmd_hdr_base;
178 struct device *dev = &hisi_hba->pdev->dev;
179 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
180
181 if (!device->port) {
182 struct task_status_struct *ts = &task->task_status;
183
184 ts->resp = SAS_TASK_UNDELIVERED;
185 ts->stat = SAS_PHY_DOWN;
186 /*
187 * libsas will use dev->port, should
188 * not call task_done for sata
189 */
190 if (device->dev_type != SAS_SATA_DEV)
191 task->task_done(task);
192 return 0;
193 }
194
195 if (DEV_IS_GONE(sas_dev)) {
196 if (sas_dev)
197 dev_info(dev, "task prep: device %llu not ready\n",
198 sas_dev->device_id);
199 else
200 dev_info(dev, "task prep: device %016llx not ready\n",
201 SAS_ADDR(device->sas_addr));
202
203 rc = SAS_PHY_DOWN;
204 return rc;
205 }
206 port = device->port->lldd_port;
207 if (port && !port->port_attached) {
208 dev_info(dev, "task prep: %s port%d not attach device\n",
209 (sas_protocol_ata(task->task_proto)) ?
210 "SATA/STP" : "SAS",
211 device->port->id);
212
213 return SAS_PHY_DOWN;
214 }
215
216 if (!sas_protocol_ata(task->task_proto)) {
217 if (task->num_scatter) {
218 n_elem = dma_map_sg(dev, task->scatter,
219 task->num_scatter, task->data_dir);
220 if (!n_elem) {
221 rc = -ENOMEM;
222 goto prep_out;
223 }
224 }
225 } else
226 n_elem = task->num_scatter;
227
228 if (hisi_hba->hw->slot_index_alloc)
229 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
230 device);
231 else
232 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
233 if (rc)
234 goto err_out;
235 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
236 &dlvry_queue, &dlvry_queue_slot);
237 if (rc)
238 goto err_out_tag;
239
240 slot = &hisi_hba->slot_info[slot_idx];
241 memset(slot, 0, sizeof(struct hisi_sas_slot));
242
243 slot->idx = slot_idx;
244 slot->n_elem = n_elem;
245 slot->dlvry_queue = dlvry_queue;
246 slot->dlvry_queue_slot = dlvry_queue_slot;
247 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
248 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
249 slot->task = task;
250 slot->port = port;
251 task->lldd_task = slot;
252 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
253
254 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
255 GFP_ATOMIC,
256 &slot->status_buffer_dma);
257 if (!slot->status_buffer) {
258 rc = -ENOMEM;
259 goto err_out_slot_buf;
260 }
261 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
262
263 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
264 GFP_ATOMIC,
265 &slot->command_table_dma);
266 if (!slot->command_table) {
267 rc = -ENOMEM;
268 goto err_out_status_buf;
269 }
270 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
271 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
272
273 switch (task->task_proto) {
274 case SAS_PROTOCOL_SMP:
275 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
276 break;
277 case SAS_PROTOCOL_SSP:
278 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
279 break;
280 case SAS_PROTOCOL_SATA:
281 case SAS_PROTOCOL_STP:
282 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
283 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
284 break;
285 default:
286 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
287 task->task_proto);
288 rc = -EINVAL;
289 break;
290 }
291
292 if (rc) {
293 dev_err(dev, "task prep: rc = 0x%x\n", rc);
294 if (slot->sge_page)
295 goto err_out_sge;
296 goto err_out_command_table;
297 }
298
299 list_add_tail(&slot->entry, &port->list);
300 spin_lock(&task->task_state_lock);
301 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
302 spin_unlock(&task->task_state_lock);
303
304 hisi_hba->slot_prep = slot;
305
306 sas_dev->running_req++;
307 ++(*pass);
308
309 return 0;
310
311 err_out_sge:
312 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
313 slot->sge_page_dma);
314 err_out_command_table:
315 dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
316 slot->command_table_dma);
317 err_out_status_buf:
318 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
319 slot->status_buffer_dma);
320 err_out_slot_buf:
321 /* Nothing to be done */
322 err_out_tag:
323 hisi_sas_slot_index_free(hisi_hba, slot_idx);
324 err_out:
325 dev_err(dev, "task prep: failed[%d]!\n", rc);
326 if (!sas_protocol_ata(task->task_proto))
327 if (n_elem)
328 dma_unmap_sg(dev, task->scatter, n_elem,
329 task->data_dir);
330 prep_out:
331 return rc;
332 }
333
334 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
335 int is_tmf, struct hisi_sas_tmf_task *tmf)
336 {
337 u32 rc;
338 u32 pass = 0;
339 unsigned long flags;
340 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
341 struct device *dev = &hisi_hba->pdev->dev;
342
343 /* protect task_prep and start_delivery sequence */
344 spin_lock_irqsave(&hisi_hba->lock, flags);
345 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
346 if (rc)
347 dev_err(dev, "task exec: failed[%d]!\n", rc);
348
349 if (likely(pass))
350 hisi_hba->hw->start_delivery(hisi_hba);
351 spin_unlock_irqrestore(&hisi_hba->lock, flags);
352
353 return rc;
354 }
355
356 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
357 {
358 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
359 struct asd_sas_phy *sas_phy = &phy->sas_phy;
360 struct sas_ha_struct *sas_ha;
361
362 if (!phy->phy_attached)
363 return;
364
365 sas_ha = &hisi_hba->sha;
366 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
367
368 if (sas_phy->phy) {
369 struct sas_phy *sphy = sas_phy->phy;
370
371 sphy->negotiated_linkrate = sas_phy->linkrate;
372 sphy->minimum_linkrate = phy->minimum_linkrate;
373 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
374 sphy->maximum_linkrate = phy->maximum_linkrate;
375 }
376
377 if (phy->phy_type & PORT_TYPE_SAS) {
378 struct sas_identify_frame *id;
379
380 id = (struct sas_identify_frame *)phy->frame_rcvd;
381 id->dev_type = phy->identify.device_type;
382 id->initiator_bits = SAS_PROTOCOL_ALL;
383 id->target_bits = phy->identify.target_port_protocols;
384 } else if (phy->phy_type & PORT_TYPE_SATA) {
385 /*Nothing*/
386 }
387
388 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
389 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
390 }
391
392 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
393 {
394 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
395 struct hisi_sas_device *sas_dev = NULL;
396 int i;
397
398 spin_lock(&hisi_hba->lock);
399 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
400 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
401 hisi_hba->devices[i].device_id = i;
402 sas_dev = &hisi_hba->devices[i];
403 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
404 sas_dev->dev_type = device->dev_type;
405 sas_dev->hisi_hba = hisi_hba;
406 sas_dev->sas_device = device;
407 break;
408 }
409 }
410 spin_unlock(&hisi_hba->lock);
411
412 return sas_dev;
413 }
414
415 static int hisi_sas_dev_found(struct domain_device *device)
416 {
417 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
418 struct domain_device *parent_dev = device->parent;
419 struct hisi_sas_device *sas_dev;
420 struct device *dev = &hisi_hba->pdev->dev;
421
422 if (hisi_hba->hw->alloc_dev)
423 sas_dev = hisi_hba->hw->alloc_dev(device);
424 else
425 sas_dev = hisi_sas_alloc_dev(device);
426 if (!sas_dev) {
427 dev_err(dev, "fail alloc dev: max support %d devices\n",
428 HISI_SAS_MAX_DEVICES);
429 return -EINVAL;
430 }
431
432 device->lldd_dev = sas_dev;
433 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
434
435 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
436 int phy_no;
437 u8 phy_num = parent_dev->ex_dev.num_phys;
438 struct ex_phy *phy;
439
440 for (phy_no = 0; phy_no < phy_num; phy_no++) {
441 phy = &parent_dev->ex_dev.ex_phy[phy_no];
442 if (SAS_ADDR(phy->attached_sas_addr) ==
443 SAS_ADDR(device->sas_addr)) {
444 sas_dev->attached_phy = phy_no;
445 break;
446 }
447 }
448
449 if (phy_no == phy_num) {
450 dev_info(dev, "dev found: no attached "
451 "dev:%016llx at ex:%016llx\n",
452 SAS_ADDR(device->sas_addr),
453 SAS_ADDR(parent_dev->sas_addr));
454 return -EINVAL;
455 }
456 }
457
458 return 0;
459 }
460
461 static int hisi_sas_slave_configure(struct scsi_device *sdev)
462 {
463 struct domain_device *dev = sdev_to_domain_dev(sdev);
464 int ret = sas_slave_configure(sdev);
465
466 if (ret)
467 return ret;
468 if (!dev_is_sata(dev))
469 sas_change_queue_depth(sdev, 64);
470
471 return 0;
472 }
473
474 static void hisi_sas_scan_start(struct Scsi_Host *shost)
475 {
476 struct hisi_hba *hisi_hba = shost_priv(shost);
477 int i;
478
479 for (i = 0; i < hisi_hba->n_phy; ++i)
480 hisi_sas_bytes_dmaed(hisi_hba, i);
481
482 hisi_hba->scan_finished = 1;
483 }
484
485 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
486 {
487 struct hisi_hba *hisi_hba = shost_priv(shost);
488 struct sas_ha_struct *sha = &hisi_hba->sha;
489
490 if (hisi_hba->scan_finished == 0)
491 return 0;
492
493 sas_drain_work(sha);
494 return 1;
495 }
496
497 static void hisi_sas_phyup_work(struct work_struct *work)
498 {
499 struct hisi_sas_phy *phy =
500 container_of(work, struct hisi_sas_phy, phyup_ws);
501 struct hisi_hba *hisi_hba = phy->hisi_hba;
502 struct asd_sas_phy *sas_phy = &phy->sas_phy;
503 int phy_no = sas_phy->id;
504
505 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
506 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
507 }
508
509 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
510 {
511 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
512 struct asd_sas_phy *sas_phy = &phy->sas_phy;
513
514 phy->hisi_hba = hisi_hba;
515 phy->port = NULL;
516 init_timer(&phy->timer);
517 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
518 sas_phy->class = SAS;
519 sas_phy->iproto = SAS_PROTOCOL_ALL;
520 sas_phy->tproto = 0;
521 sas_phy->type = PHY_TYPE_PHYSICAL;
522 sas_phy->role = PHY_ROLE_INITIATOR;
523 sas_phy->oob_mode = OOB_NOT_CONNECTED;
524 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
525 sas_phy->id = phy_no;
526 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
527 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
528 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
529 sas_phy->lldd_phy = phy;
530
531 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
532 }
533
534 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
535 {
536 struct sas_ha_struct *sas_ha = sas_phy->ha;
537 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
538 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
539 struct asd_sas_port *sas_port = sas_phy->port;
540 struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
541 unsigned long flags;
542
543 if (!sas_port)
544 return;
545
546 spin_lock_irqsave(&hisi_hba->lock, flags);
547 port->port_attached = 1;
548 port->id = phy->port_id;
549 phy->port = port;
550 sas_port->lldd_port = port;
551 spin_unlock_irqrestore(&hisi_hba->lock, flags);
552 }
553
554 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
555 struct domain_device *device)
556 {
557 struct hisi_sas_phy *phy;
558 struct hisi_sas_port *port;
559 struct hisi_sas_slot *slot, *slot2;
560 struct device *dev = &hisi_hba->pdev->dev;
561
562 phy = &hisi_hba->phy[phy_no];
563 port = phy->port;
564 if (!port)
565 return;
566
567 list_for_each_entry_safe(slot, slot2, &port->list, entry) {
568 struct sas_task *task;
569
570 task = slot->task;
571 if (device && task->dev != device)
572 continue;
573
574 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
575 slot->dlvry_queue, slot->dlvry_queue_slot, task);
576 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
577 }
578 }
579
580 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
581 {
582 struct domain_device *device;
583 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
584 struct asd_sas_port *sas_port = sas_phy->port;
585
586 list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
587 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
588 }
589
590 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
591 struct domain_device *device)
592 {
593 struct asd_sas_port *port = device->port;
594 struct asd_sas_phy *sas_phy;
595
596 list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
597 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
598 }
599
600 static void hisi_sas_dev_gone(struct domain_device *device)
601 {
602 struct hisi_sas_device *sas_dev = device->lldd_dev;
603 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
604 struct device *dev = &hisi_hba->pdev->dev;
605 u64 dev_id = sas_dev->device_id;
606
607 dev_info(dev, "found dev[%lld:%x] is gone\n",
608 sas_dev->device_id, sas_dev->dev_type);
609
610 hisi_sas_internal_task_abort(hisi_hba, device,
611 HISI_SAS_INT_ABT_DEV, 0);
612
613 hisi_hba->hw->free_device(hisi_hba, sas_dev);
614 device->lldd_dev = NULL;
615 memset(sas_dev, 0, sizeof(*sas_dev));
616 sas_dev->device_id = dev_id;
617 sas_dev->dev_type = SAS_PHY_UNUSED;
618 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
619 }
620
621 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
622 {
623 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
624 }
625
626 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
627 void *funcdata)
628 {
629 struct sas_ha_struct *sas_ha = sas_phy->ha;
630 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
631 int phy_no = sas_phy->id;
632
633 switch (func) {
634 case PHY_FUNC_HARD_RESET:
635 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
636 break;
637
638 case PHY_FUNC_LINK_RESET:
639 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
640 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
641 break;
642
643 case PHY_FUNC_DISABLE:
644 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
645 break;
646
647 case PHY_FUNC_SET_LINK_RATE:
648 case PHY_FUNC_RELEASE_SPINUP_HOLD:
649 default:
650 return -EOPNOTSUPP;
651 }
652 return 0;
653 }
654
655 static void hisi_sas_task_done(struct sas_task *task)
656 {
657 if (!del_timer(&task->slow_task->timer))
658 return;
659 complete(&task->slow_task->completion);
660 }
661
662 static void hisi_sas_tmf_timedout(unsigned long data)
663 {
664 struct sas_task *task = (struct sas_task *)data;
665
666 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
667 complete(&task->slow_task->completion);
668 }
669
670 #define TASK_TIMEOUT 20
671 #define TASK_RETRY 3
672 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
673 void *parameter, u32 para_len,
674 struct hisi_sas_tmf_task *tmf)
675 {
676 struct hisi_sas_device *sas_dev = device->lldd_dev;
677 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
678 struct device *dev = &hisi_hba->pdev->dev;
679 struct sas_task *task;
680 int res, retry;
681
682 for (retry = 0; retry < TASK_RETRY; retry++) {
683 task = sas_alloc_slow_task(GFP_KERNEL);
684 if (!task)
685 return -ENOMEM;
686
687 task->dev = device;
688 task->task_proto = device->tproto;
689
690 memcpy(&task->ssp_task, parameter, para_len);
691 task->task_done = hisi_sas_task_done;
692
693 task->slow_task->timer.data = (unsigned long) task;
694 task->slow_task->timer.function = hisi_sas_tmf_timedout;
695 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
696 add_timer(&task->slow_task->timer);
697
698 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
699
700 if (res) {
701 del_timer(&task->slow_task->timer);
702 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
703 res);
704 goto ex_err;
705 }
706
707 wait_for_completion(&task->slow_task->completion);
708 res = TMF_RESP_FUNC_FAILED;
709 /* Even TMF timed out, return direct. */
710 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
711 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
712 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
713 tmf->tag_of_task_to_be_managed);
714 if (task->lldd_task) {
715 struct hisi_sas_slot *slot =
716 task->lldd_task;
717
718 hisi_sas_slot_task_free(hisi_hba,
719 task, slot);
720 }
721
722 goto ex_err;
723 }
724 }
725
726 if (task->task_status.resp == SAS_TASK_COMPLETE &&
727 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
728 res = TMF_RESP_FUNC_COMPLETE;
729 break;
730 }
731
732 if (task->task_status.resp == SAS_TASK_COMPLETE &&
733 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
734 res = TMF_RESP_FUNC_SUCC;
735 break;
736 }
737
738 if (task->task_status.resp == SAS_TASK_COMPLETE &&
739 task->task_status.stat == SAS_DATA_UNDERRUN) {
740 /* no error, but return the number of bytes of
741 * underrun
742 */
743 dev_warn(dev, "abort tmf: task to dev %016llx "
744 "resp: 0x%x sts 0x%x underrun\n",
745 SAS_ADDR(device->sas_addr),
746 task->task_status.resp,
747 task->task_status.stat);
748 res = task->task_status.residual;
749 break;
750 }
751
752 if (task->task_status.resp == SAS_TASK_COMPLETE &&
753 task->task_status.stat == SAS_DATA_OVERRUN) {
754 dev_warn(dev, "abort tmf: blocked task error\n");
755 res = -EMSGSIZE;
756 break;
757 }
758
759 dev_warn(dev, "abort tmf: task to dev "
760 "%016llx resp: 0x%x status 0x%x\n",
761 SAS_ADDR(device->sas_addr), task->task_status.resp,
762 task->task_status.stat);
763 sas_free_task(task);
764 task = NULL;
765 }
766 ex_err:
767 WARN_ON(retry == TASK_RETRY);
768 sas_free_task(task);
769 return res;
770 }
771
772 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
773 u8 *lun, struct hisi_sas_tmf_task *tmf)
774 {
775 struct sas_ssp_task ssp_task;
776
777 if (!(device->tproto & SAS_PROTOCOL_SSP))
778 return TMF_RESP_FUNC_ESUPP;
779
780 memcpy(ssp_task.LUN, lun, 8);
781
782 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
783 sizeof(ssp_task), tmf);
784 }
785
786 static int hisi_sas_abort_task(struct sas_task *task)
787 {
788 struct scsi_lun lun;
789 struct hisi_sas_tmf_task tmf_task;
790 struct domain_device *device = task->dev;
791 struct hisi_sas_device *sas_dev = device->lldd_dev;
792 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
793 struct device *dev = &hisi_hba->pdev->dev;
794 int rc = TMF_RESP_FUNC_FAILED;
795 unsigned long flags;
796
797 if (!sas_dev) {
798 dev_warn(dev, "Device has been removed\n");
799 return TMF_RESP_FUNC_FAILED;
800 }
801
802 spin_lock_irqsave(&task->task_state_lock, flags);
803 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
804 spin_unlock_irqrestore(&task->task_state_lock, flags);
805 rc = TMF_RESP_FUNC_COMPLETE;
806 goto out;
807 }
808
809 spin_unlock_irqrestore(&task->task_state_lock, flags);
810 sas_dev->dev_status = HISI_SAS_DEV_EH;
811 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
812 struct scsi_cmnd *cmnd = task->uldd_task;
813 struct hisi_sas_slot *slot = task->lldd_task;
814 u32 tag = slot->idx;
815
816 int_to_scsilun(cmnd->device->lun, &lun);
817 tmf_task.tmf = TMF_ABORT_TASK;
818 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
819
820 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
821 &tmf_task);
822
823 /* if successful, clear the task and callback forwards.*/
824 if (rc == TMF_RESP_FUNC_COMPLETE) {
825 if (task->lldd_task) {
826 struct hisi_sas_slot *slot;
827
828 slot = &hisi_hba->slot_info
829 [tmf_task.tag_of_task_to_be_managed];
830 spin_lock_irqsave(&hisi_hba->lock, flags);
831 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
832 spin_unlock_irqrestore(&hisi_hba->lock, flags);
833 }
834 }
835
836 hisi_sas_internal_task_abort(hisi_hba, device,
837 HISI_SAS_INT_ABT_CMD, tag);
838 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
839 task->task_proto & SAS_PROTOCOL_STP) {
840 if (task->dev->dev_type == SAS_SATA_DEV) {
841 hisi_sas_internal_task_abort(hisi_hba, device,
842 HISI_SAS_INT_ABT_DEV, 0);
843 rc = TMF_RESP_FUNC_COMPLETE;
844 }
845 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
846 /* SMP */
847 struct hisi_sas_slot *slot = task->lldd_task;
848 u32 tag = slot->idx;
849
850 hisi_sas_internal_task_abort(hisi_hba, device,
851 HISI_SAS_INT_ABT_CMD, tag);
852 }
853
854 out:
855 if (rc != TMF_RESP_FUNC_COMPLETE)
856 dev_notice(dev, "abort task: rc=%d\n", rc);
857 return rc;
858 }
859
860 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
861 {
862 struct hisi_sas_tmf_task tmf_task;
863 int rc = TMF_RESP_FUNC_FAILED;
864
865 tmf_task.tmf = TMF_ABORT_TASK_SET;
866 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
867
868 return rc;
869 }
870
871 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
872 {
873 int rc = TMF_RESP_FUNC_FAILED;
874 struct hisi_sas_tmf_task tmf_task;
875
876 tmf_task.tmf = TMF_CLEAR_ACA;
877 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
878
879 return rc;
880 }
881
882 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
883 {
884 struct sas_phy *phy = sas_get_local_phy(device);
885 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
886 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
887 rc = sas_phy_reset(phy, reset_type);
888 sas_put_local_phy(phy);
889 msleep(2000);
890 return rc;
891 }
892
893 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
894 {
895 struct hisi_sas_device *sas_dev = device->lldd_dev;
896 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
897 unsigned long flags;
898 int rc = TMF_RESP_FUNC_FAILED;
899
900 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
901 return TMF_RESP_FUNC_FAILED;
902 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
903
904 rc = hisi_sas_debug_I_T_nexus_reset(device);
905
906 spin_lock_irqsave(&hisi_hba->lock, flags);
907 hisi_sas_release_task(hisi_hba, device);
908 spin_unlock_irqrestore(&hisi_hba->lock, flags);
909
910 return 0;
911 }
912
913 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
914 {
915 struct hisi_sas_tmf_task tmf_task;
916 struct hisi_sas_device *sas_dev = device->lldd_dev;
917 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
918 struct device *dev = &hisi_hba->pdev->dev;
919 unsigned long flags;
920 int rc = TMF_RESP_FUNC_FAILED;
921
922 tmf_task.tmf = TMF_LU_RESET;
923 sas_dev->dev_status = HISI_SAS_DEV_EH;
924 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
925 if (rc == TMF_RESP_FUNC_COMPLETE) {
926 spin_lock_irqsave(&hisi_hba->lock, flags);
927 hisi_sas_release_task(hisi_hba, device);
928 spin_unlock_irqrestore(&hisi_hba->lock, flags);
929 }
930
931 /* If failed, fall-through I_T_Nexus reset */
932 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
933 sas_dev->device_id, rc);
934 return rc;
935 }
936
937 static int hisi_sas_query_task(struct sas_task *task)
938 {
939 struct scsi_lun lun;
940 struct hisi_sas_tmf_task tmf_task;
941 int rc = TMF_RESP_FUNC_FAILED;
942
943 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
944 struct scsi_cmnd *cmnd = task->uldd_task;
945 struct domain_device *device = task->dev;
946 struct hisi_sas_slot *slot = task->lldd_task;
947 u32 tag = slot->idx;
948
949 int_to_scsilun(cmnd->device->lun, &lun);
950 tmf_task.tmf = TMF_QUERY_TASK;
951 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
952
953 rc = hisi_sas_debug_issue_ssp_tmf(device,
954 lun.scsi_lun,
955 &tmf_task);
956 switch (rc) {
957 /* The task is still in Lun, release it then */
958 case TMF_RESP_FUNC_SUCC:
959 /* The task is not in Lun or failed, reset the phy */
960 case TMF_RESP_FUNC_FAILED:
961 case TMF_RESP_FUNC_COMPLETE:
962 break;
963 }
964 }
965 return rc;
966 }
967
968 static int
969 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id,
970 struct sas_task *task, int abort_flag,
971 int task_tag)
972 {
973 struct domain_device *device = task->dev;
974 struct hisi_sas_device *sas_dev = device->lldd_dev;
975 struct device *dev = &hisi_hba->pdev->dev;
976 struct hisi_sas_port *port;
977 struct hisi_sas_slot *slot;
978 struct hisi_sas_cmd_hdr *cmd_hdr_base;
979 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
980
981 if (!device->port)
982 return -1;
983
984 port = device->port->lldd_port;
985
986 /* simply get a slot and send abort command */
987 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
988 if (rc)
989 goto err_out;
990 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
991 &dlvry_queue, &dlvry_queue_slot);
992 if (rc)
993 goto err_out_tag;
994
995 slot = &hisi_hba->slot_info[slot_idx];
996 memset(slot, 0, sizeof(struct hisi_sas_slot));
997
998 slot->idx = slot_idx;
999 slot->n_elem = n_elem;
1000 slot->dlvry_queue = dlvry_queue;
1001 slot->dlvry_queue_slot = dlvry_queue_slot;
1002 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1003 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1004 slot->task = task;
1005 slot->port = port;
1006 task->lldd_task = slot;
1007
1008 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1009
1010 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1011 abort_flag, task_tag);
1012 if (rc)
1013 goto err_out_tag;
1014
1015 /* Port structure is static for the HBA, so
1016 * even if the port is deformed it is ok
1017 * to reference.
1018 */
1019 list_add_tail(&slot->entry, &port->list);
1020 spin_lock(&task->task_state_lock);
1021 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1022 spin_unlock(&task->task_state_lock);
1023
1024 hisi_hba->slot_prep = slot;
1025
1026 sas_dev->running_req++;
1027 /* send abort command to our chip */
1028 hisi_hba->hw->start_delivery(hisi_hba);
1029
1030 return 0;
1031
1032 err_out_tag:
1033 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1034 err_out:
1035 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1036
1037 return rc;
1038 }
1039
1040 /**
1041 * hisi_sas_internal_task_abort -- execute an internal
1042 * abort command for single IO command or a device
1043 * @hisi_hba: host controller struct
1044 * @device: domain device
1045 * @abort_flag: mode of operation, device or single IO
1046 * @tag: tag of IO to be aborted (only relevant to single
1047 * IO mode)
1048 */
1049 static int
1050 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1051 struct domain_device *device,
1052 int abort_flag, int tag)
1053 {
1054 struct sas_task *task;
1055 struct hisi_sas_device *sas_dev = device->lldd_dev;
1056 struct device *dev = &hisi_hba->pdev->dev;
1057 int res;
1058 unsigned long flags;
1059
1060 if (!hisi_hba->hw->prep_abort)
1061 return -EOPNOTSUPP;
1062
1063 task = sas_alloc_slow_task(GFP_KERNEL);
1064 if (!task)
1065 return -ENOMEM;
1066
1067 task->dev = device;
1068 task->task_proto = device->tproto;
1069 task->task_done = hisi_sas_task_done;
1070 task->slow_task->timer.data = (unsigned long)task;
1071 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1072 task->slow_task->timer.expires = jiffies + 20*HZ;
1073 add_timer(&task->slow_task->timer);
1074
1075 /* Lock as we are alloc'ing a slot, which cannot be interrupted */
1076 spin_lock_irqsave(&hisi_hba->lock, flags);
1077 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1078 task, abort_flag, tag);
1079 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1080 if (res) {
1081 del_timer(&task->slow_task->timer);
1082 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1083 res);
1084 goto exit;
1085 }
1086 wait_for_completion(&task->slow_task->completion);
1087 res = TMF_RESP_FUNC_FAILED;
1088
1089 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1090 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1091 res = TMF_RESP_FUNC_COMPLETE;
1092 goto exit;
1093 }
1094
1095 /* TMF timed out, return direct. */
1096 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1097 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1098 dev_err(dev, "internal task abort: timeout.\n");
1099 if (task->lldd_task) {
1100 struct hisi_sas_slot *slot = task->lldd_task;
1101
1102 hisi_sas_slot_task_free(hisi_hba, task, slot);
1103 }
1104 }
1105 }
1106
1107 exit:
1108 dev_info(dev, "internal task abort: task to dev %016llx task=%p "
1109 "resp: 0x%x sts 0x%x\n",
1110 SAS_ADDR(device->sas_addr),
1111 task,
1112 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1113 task->task_status.stat);
1114 sas_free_task(task);
1115
1116 return res;
1117 }
1118
1119 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1120 {
1121 hisi_sas_port_notify_formed(sas_phy);
1122 }
1123
1124 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1125 {
1126 hisi_sas_port_notify_deformed(sas_phy);
1127 }
1128
1129 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1130 {
1131 phy->phy_attached = 0;
1132 phy->phy_type = 0;
1133 phy->port = NULL;
1134 }
1135
1136 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1137 {
1138 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1139 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1140 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1141
1142 if (rdy) {
1143 /* Phy down but ready */
1144 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1145 hisi_sas_port_notify_formed(sas_phy);
1146 } else {
1147 struct hisi_sas_port *port = phy->port;
1148
1149 /* Phy down and not ready */
1150 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1151 sas_phy_disconnected(sas_phy);
1152
1153 if (port) {
1154 if (phy->phy_type & PORT_TYPE_SAS) {
1155 int port_id = port->id;
1156
1157 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1158 port_id))
1159 port->port_attached = 0;
1160 } else if (phy->phy_type & PORT_TYPE_SATA)
1161 port->port_attached = 0;
1162 }
1163 hisi_sas_phy_disconnected(phy);
1164 }
1165 }
1166 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1167
1168 static struct scsi_transport_template *hisi_sas_stt;
1169
1170 static struct scsi_host_template hisi_sas_sht = {
1171 .module = THIS_MODULE,
1172 .name = DRV_NAME,
1173 .queuecommand = sas_queuecommand,
1174 .target_alloc = sas_target_alloc,
1175 .slave_configure = hisi_sas_slave_configure,
1176 .scan_finished = hisi_sas_scan_finished,
1177 .scan_start = hisi_sas_scan_start,
1178 .change_queue_depth = sas_change_queue_depth,
1179 .bios_param = sas_bios_param,
1180 .can_queue = 1,
1181 .this_id = -1,
1182 .sg_tablesize = SG_ALL,
1183 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1184 .use_clustering = ENABLE_CLUSTERING,
1185 .eh_device_reset_handler = sas_eh_device_reset_handler,
1186 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1187 .target_destroy = sas_target_destroy,
1188 .ioctl = sas_ioctl,
1189 };
1190
1191 static struct sas_domain_function_template hisi_sas_transport_ops = {
1192 .lldd_dev_found = hisi_sas_dev_found,
1193 .lldd_dev_gone = hisi_sas_dev_gone,
1194 .lldd_execute_task = hisi_sas_queue_command,
1195 .lldd_control_phy = hisi_sas_control_phy,
1196 .lldd_abort_task = hisi_sas_abort_task,
1197 .lldd_abort_task_set = hisi_sas_abort_task_set,
1198 .lldd_clear_aca = hisi_sas_clear_aca,
1199 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1200 .lldd_lu_reset = hisi_sas_lu_reset,
1201 .lldd_query_task = hisi_sas_query_task,
1202 .lldd_port_formed = hisi_sas_port_formed,
1203 .lldd_port_deformed = hisi_sas_port_deformed,
1204 };
1205
1206 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1207 {
1208 struct platform_device *pdev = hisi_hba->pdev;
1209 struct device *dev = &pdev->dev;
1210 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1211
1212 spin_lock_init(&hisi_hba->lock);
1213 for (i = 0; i < hisi_hba->n_phy; i++) {
1214 hisi_sas_phy_init(hisi_hba, i);
1215 hisi_hba->port[i].port_attached = 0;
1216 hisi_hba->port[i].id = -1;
1217 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1218 }
1219
1220 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1221 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1222 hisi_hba->devices[i].device_id = i;
1223 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1224 }
1225
1226 for (i = 0; i < hisi_hba->queue_count; i++) {
1227 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1228 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1229
1230 /* Completion queue structure */
1231 cq->id = i;
1232 cq->hisi_hba = hisi_hba;
1233
1234 /* Delivery queue structure */
1235 dq->id = i;
1236 dq->hisi_hba = hisi_hba;
1237
1238 /* Delivery queue */
1239 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1240 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1241 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1242 if (!hisi_hba->cmd_hdr[i])
1243 goto err_out;
1244 memset(hisi_hba->cmd_hdr[i], 0, s);
1245
1246 /* Completion queue */
1247 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1248 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1249 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1250 if (!hisi_hba->complete_hdr[i])
1251 goto err_out;
1252 memset(hisi_hba->complete_hdr[i], 0, s);
1253 }
1254
1255 s = HISI_SAS_STATUS_BUF_SZ;
1256 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1257 dev, s, 16, 0);
1258 if (!hisi_hba->status_buffer_pool)
1259 goto err_out;
1260
1261 s = HISI_SAS_COMMAND_TABLE_SZ;
1262 hisi_hba->command_table_pool = dma_pool_create("command_table",
1263 dev, s, 16, 0);
1264 if (!hisi_hba->command_table_pool)
1265 goto err_out;
1266
1267 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1268 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1269 GFP_KERNEL);
1270 if (!hisi_hba->itct)
1271 goto err_out;
1272
1273 memset(hisi_hba->itct, 0, s);
1274
1275 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1276 sizeof(struct hisi_sas_slot),
1277 GFP_KERNEL);
1278 if (!hisi_hba->slot_info)
1279 goto err_out;
1280
1281 s = max_command_entries * sizeof(struct hisi_sas_iost);
1282 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1283 GFP_KERNEL);
1284 if (!hisi_hba->iost)
1285 goto err_out;
1286
1287 memset(hisi_hba->iost, 0, s);
1288
1289 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1290 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1291 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1292 if (!hisi_hba->breakpoint)
1293 goto err_out;
1294
1295 memset(hisi_hba->breakpoint, 0, s);
1296
1297 hisi_hba->slot_index_count = max_command_entries;
1298 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1299 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1300 if (!hisi_hba->slot_index_tags)
1301 goto err_out;
1302
1303 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1304 sizeof(struct hisi_sas_sge_page), 16, 0);
1305 if (!hisi_hba->sge_page_pool)
1306 goto err_out;
1307
1308 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1309 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1310 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1311 if (!hisi_hba->initial_fis)
1312 goto err_out;
1313 memset(hisi_hba->initial_fis, 0, s);
1314
1315 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1316 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1317 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1318 if (!hisi_hba->sata_breakpoint)
1319 goto err_out;
1320 memset(hisi_hba->sata_breakpoint, 0, s);
1321
1322 hisi_sas_slot_index_init(hisi_hba);
1323
1324 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1325 if (!hisi_hba->wq) {
1326 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1327 goto err_out;
1328 }
1329
1330 return 0;
1331 err_out:
1332 return -ENOMEM;
1333 }
1334
1335 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1336 {
1337 struct device *dev = &hisi_hba->pdev->dev;
1338 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1339
1340 for (i = 0; i < hisi_hba->queue_count; i++) {
1341 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1342 if (hisi_hba->cmd_hdr[i])
1343 dma_free_coherent(dev, s,
1344 hisi_hba->cmd_hdr[i],
1345 hisi_hba->cmd_hdr_dma[i]);
1346
1347 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1348 if (hisi_hba->complete_hdr[i])
1349 dma_free_coherent(dev, s,
1350 hisi_hba->complete_hdr[i],
1351 hisi_hba->complete_hdr_dma[i]);
1352 }
1353
1354 dma_pool_destroy(hisi_hba->status_buffer_pool);
1355 dma_pool_destroy(hisi_hba->command_table_pool);
1356 dma_pool_destroy(hisi_hba->sge_page_pool);
1357
1358 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1359 if (hisi_hba->itct)
1360 dma_free_coherent(dev, s,
1361 hisi_hba->itct, hisi_hba->itct_dma);
1362
1363 s = max_command_entries * sizeof(struct hisi_sas_iost);
1364 if (hisi_hba->iost)
1365 dma_free_coherent(dev, s,
1366 hisi_hba->iost, hisi_hba->iost_dma);
1367
1368 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1369 if (hisi_hba->breakpoint)
1370 dma_free_coherent(dev, s,
1371 hisi_hba->breakpoint,
1372 hisi_hba->breakpoint_dma);
1373
1374
1375 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1376 if (hisi_hba->initial_fis)
1377 dma_free_coherent(dev, s,
1378 hisi_hba->initial_fis,
1379 hisi_hba->initial_fis_dma);
1380
1381 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1382 if (hisi_hba->sata_breakpoint)
1383 dma_free_coherent(dev, s,
1384 hisi_hba->sata_breakpoint,
1385 hisi_hba->sata_breakpoint_dma);
1386
1387 if (hisi_hba->wq)
1388 destroy_workqueue(hisi_hba->wq);
1389 }
1390
1391 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1392 const struct hisi_sas_hw *hw)
1393 {
1394 struct resource *res;
1395 struct Scsi_Host *shost;
1396 struct hisi_hba *hisi_hba;
1397 struct device *dev = &pdev->dev;
1398 struct device_node *np = pdev->dev.of_node;
1399 struct clk *refclk;
1400
1401 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1402 if (!shost)
1403 goto err_out;
1404 hisi_hba = shost_priv(shost);
1405
1406 hisi_hba->hw = hw;
1407 hisi_hba->pdev = pdev;
1408 hisi_hba->shost = shost;
1409 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1410
1411 init_timer(&hisi_hba->timer);
1412
1413 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1414 SAS_ADDR_SIZE))
1415 goto err_out;
1416
1417 if (np) {
1418 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1419 "hisilicon,sas-syscon");
1420 if (IS_ERR(hisi_hba->ctrl))
1421 goto err_out;
1422
1423 if (device_property_read_u32(dev, "ctrl-reset-reg",
1424 &hisi_hba->ctrl_reset_reg))
1425 goto err_out;
1426
1427 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1428 &hisi_hba->ctrl_reset_sts_reg))
1429 goto err_out;
1430
1431 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1432 &hisi_hba->ctrl_clock_ena_reg))
1433 goto err_out;
1434 }
1435
1436 refclk = devm_clk_get(&pdev->dev, NULL);
1437 if (IS_ERR(refclk))
1438 dev_info(dev, "no ref clk property\n");
1439 else
1440 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1441
1442 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1443 goto err_out;
1444
1445 if (device_property_read_u32(dev, "queue-count",
1446 &hisi_hba->queue_count))
1447 goto err_out;
1448
1449 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1450 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1451 dev_err(dev, "No usable DMA addressing method\n");
1452 goto err_out;
1453 }
1454
1455 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1456 hisi_hba->regs = devm_ioremap_resource(dev, res);
1457 if (IS_ERR(hisi_hba->regs))
1458 goto err_out;
1459
1460 if (hisi_sas_alloc(hisi_hba, shost)) {
1461 hisi_sas_free(hisi_hba);
1462 goto err_out;
1463 }
1464
1465 return shost;
1466 err_out:
1467 dev_err(dev, "shost alloc failed\n");
1468 return NULL;
1469 }
1470
1471 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1472 {
1473 int i;
1474
1475 for (i = 0; i < hisi_hba->n_phy; i++)
1476 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1477 hisi_hba->sas_addr,
1478 SAS_ADDR_SIZE);
1479 }
1480
1481 int hisi_sas_probe(struct platform_device *pdev,
1482 const struct hisi_sas_hw *hw)
1483 {
1484 struct Scsi_Host *shost;
1485 struct hisi_hba *hisi_hba;
1486 struct device *dev = &pdev->dev;
1487 struct asd_sas_phy **arr_phy;
1488 struct asd_sas_port **arr_port;
1489 struct sas_ha_struct *sha;
1490 int rc, phy_nr, port_nr, i;
1491
1492 shost = hisi_sas_shost_alloc(pdev, hw);
1493 if (!shost) {
1494 rc = -ENOMEM;
1495 goto err_out_ha;
1496 }
1497
1498 sha = SHOST_TO_SAS_HA(shost);
1499 hisi_hba = shost_priv(shost);
1500 platform_set_drvdata(pdev, sha);
1501
1502 phy_nr = port_nr = hisi_hba->n_phy;
1503
1504 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1505 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1506 if (!arr_phy || !arr_port)
1507 return -ENOMEM;
1508
1509 sha->sas_phy = arr_phy;
1510 sha->sas_port = arr_port;
1511 sha->core.shost = shost;
1512 sha->lldd_ha = hisi_hba;
1513
1514 shost->transportt = hisi_sas_stt;
1515 shost->max_id = HISI_SAS_MAX_DEVICES;
1516 shost->max_lun = ~0;
1517 shost->max_channel = 1;
1518 shost->max_cmd_len = 16;
1519 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1520 shost->can_queue = hisi_hba->hw->max_command_entries;
1521 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1522
1523 sha->sas_ha_name = DRV_NAME;
1524 sha->dev = &hisi_hba->pdev->dev;
1525 sha->lldd_module = THIS_MODULE;
1526 sha->sas_addr = &hisi_hba->sas_addr[0];
1527 sha->num_phys = hisi_hba->n_phy;
1528 sha->core.shost = hisi_hba->shost;
1529
1530 for (i = 0; i < hisi_hba->n_phy; i++) {
1531 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1532 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1533 }
1534
1535 hisi_sas_init_add(hisi_hba);
1536
1537 rc = hisi_hba->hw->hw_init(hisi_hba);
1538 if (rc)
1539 goto err_out_ha;
1540
1541 rc = scsi_add_host(shost, &pdev->dev);
1542 if (rc)
1543 goto err_out_ha;
1544
1545 rc = sas_register_ha(sha);
1546 if (rc)
1547 goto err_out_register_ha;
1548
1549 scsi_scan_host(shost);
1550
1551 return 0;
1552
1553 err_out_register_ha:
1554 scsi_remove_host(shost);
1555 err_out_ha:
1556 kfree(shost);
1557 return rc;
1558 }
1559 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1560
1561 int hisi_sas_remove(struct platform_device *pdev)
1562 {
1563 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1564 struct hisi_hba *hisi_hba = sha->lldd_ha;
1565
1566 scsi_remove_host(sha->core.shost);
1567 sas_unregister_ha(sha);
1568 sas_remove_host(sha->core.shost);
1569
1570 hisi_sas_free(hisi_hba);
1571 return 0;
1572 }
1573 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1574
1575 static __init int hisi_sas_init(void)
1576 {
1577 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1578
1579 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1580 if (!hisi_sas_stt)
1581 return -ENOMEM;
1582
1583 return 0;
1584 }
1585
1586 static __exit void hisi_sas_exit(void)
1587 {
1588 sas_release_transport(hisi_sas_stt);
1589 }
1590
1591 module_init(hisi_sas_init);
1592 module_exit(hisi_sas_exit);
1593
1594 MODULE_VERSION(DRV_VERSION);
1595 MODULE_LICENSE("GPL");
1596 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1597 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1598 MODULE_ALIAS("platform:" DRV_NAME);
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