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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
1 /*
2 * Copyright (c) 2015 Linaro Ltd.
3 * Copyright (c) 2015 Hisilicon Limited.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 */
11
12 #include "hisi_sas.h"
13 #define DRV_NAME "hisi_sas"
14
15 #define DEV_IS_GONE(dev) \
16 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
17
18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
19 u8 *lun, struct hisi_sas_tmf_task *tmf);
20 static int
21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
22 struct domain_device *device,
23 int abort_flag, int tag);
24 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
25
26 u8 hisi_sas_get_ata_protocol(u8 cmd, int direction)
27 {
28 switch (cmd) {
29 case ATA_CMD_FPDMA_WRITE:
30 case ATA_CMD_FPDMA_READ:
31 case ATA_CMD_FPDMA_RECV:
32 case ATA_CMD_FPDMA_SEND:
33 case ATA_CMD_NCQ_NON_DATA:
34 return HISI_SAS_SATA_PROTOCOL_FPDMA;
35
36 case ATA_CMD_DOWNLOAD_MICRO:
37 case ATA_CMD_ID_ATA:
38 case ATA_CMD_PMP_READ:
39 case ATA_CMD_READ_LOG_EXT:
40 case ATA_CMD_PIO_READ:
41 case ATA_CMD_PIO_READ_EXT:
42 case ATA_CMD_PMP_WRITE:
43 case ATA_CMD_WRITE_LOG_EXT:
44 case ATA_CMD_PIO_WRITE:
45 case ATA_CMD_PIO_WRITE_EXT:
46 return HISI_SAS_SATA_PROTOCOL_PIO;
47
48 case ATA_CMD_DSM:
49 case ATA_CMD_DOWNLOAD_MICRO_DMA:
50 case ATA_CMD_PMP_READ_DMA:
51 case ATA_CMD_PMP_WRITE_DMA:
52 case ATA_CMD_READ:
53 case ATA_CMD_READ_EXT:
54 case ATA_CMD_READ_LOG_DMA_EXT:
55 case ATA_CMD_READ_STREAM_DMA_EXT:
56 case ATA_CMD_TRUSTED_RCV_DMA:
57 case ATA_CMD_TRUSTED_SND_DMA:
58 case ATA_CMD_WRITE:
59 case ATA_CMD_WRITE_EXT:
60 case ATA_CMD_WRITE_FUA_EXT:
61 case ATA_CMD_WRITE_QUEUED:
62 case ATA_CMD_WRITE_LOG_DMA_EXT:
63 case ATA_CMD_WRITE_STREAM_DMA_EXT:
64 return HISI_SAS_SATA_PROTOCOL_DMA;
65
66 case ATA_CMD_CHK_POWER:
67 case ATA_CMD_DEV_RESET:
68 case ATA_CMD_EDD:
69 case ATA_CMD_FLUSH:
70 case ATA_CMD_FLUSH_EXT:
71 case ATA_CMD_VERIFY:
72 case ATA_CMD_VERIFY_EXT:
73 case ATA_CMD_SET_FEATURES:
74 case ATA_CMD_STANDBY:
75 case ATA_CMD_STANDBYNOW1:
76 return HISI_SAS_SATA_PROTOCOL_NONDATA;
77 default:
78 if (direction == DMA_NONE)
79 return HISI_SAS_SATA_PROTOCOL_NONDATA;
80 return HISI_SAS_SATA_PROTOCOL_PIO;
81 }
82 }
83 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
84
85 void hisi_sas_sata_done(struct sas_task *task,
86 struct hisi_sas_slot *slot)
87 {
88 struct task_status_struct *ts = &task->task_status;
89 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
90 struct hisi_sas_status_buffer *status_buf =
91 hisi_sas_status_buf_addr_mem(slot);
92 u8 *iu = &status_buf->iu[0];
93 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
94
95 resp->frame_len = sizeof(struct dev_to_host_fis);
96 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
97
98 ts->buf_valid_size = sizeof(*resp);
99 }
100 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
101
102 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
103 {
104 struct ata_queued_cmd *qc = task->uldd_task;
105
106 if (qc) {
107 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
108 qc->tf.command == ATA_CMD_FPDMA_READ) {
109 *tag = qc->tag;
110 return 1;
111 }
112 }
113 return 0;
114 }
115 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
116
117 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
118 {
119 return device->port->ha->lldd_ha;
120 }
121
122 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
123 {
124 return container_of(sas_port, struct hisi_sas_port, sas_port);
125 }
126 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
127
128 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
129 {
130 void *bitmap = hisi_hba->slot_index_tags;
131
132 clear_bit(slot_idx, bitmap);
133 }
134
135 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
136 {
137 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
138 }
139
140 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
141 {
142 void *bitmap = hisi_hba->slot_index_tags;
143
144 set_bit(slot_idx, bitmap);
145 }
146
147 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
148 {
149 unsigned int index;
150 void *bitmap = hisi_hba->slot_index_tags;
151
152 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
153 if (index >= hisi_hba->slot_index_count)
154 return -SAS_QUEUE_FULL;
155 hisi_sas_slot_index_set(hisi_hba, index);
156 *slot_idx = index;
157 return 0;
158 }
159
160 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
161 {
162 int i;
163
164 for (i = 0; i < hisi_hba->slot_index_count; ++i)
165 hisi_sas_slot_index_clear(hisi_hba, i);
166 }
167
168 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
169 struct hisi_sas_slot *slot)
170 {
171
172 if (task) {
173 struct device *dev = hisi_hba->dev;
174 struct domain_device *device = task->dev;
175 struct hisi_sas_device *sas_dev = device->lldd_dev;
176
177 if (!sas_protocol_ata(task->task_proto))
178 if (slot->n_elem)
179 dma_unmap_sg(dev, task->scatter, slot->n_elem,
180 task->data_dir);
181
182 task->lldd_task = NULL;
183
184 if (sas_dev)
185 atomic64_dec(&sas_dev->running_req);
186 }
187
188 if (slot->buf)
189 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
190
191
192 list_del_init(&slot->entry);
193 slot->task = NULL;
194 slot->port = NULL;
195 hisi_sas_slot_index_free(hisi_hba, slot->idx);
196
197 /* slot memory is fully zeroed when it is reused */
198 }
199 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
200
201 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
202 struct hisi_sas_slot *slot)
203 {
204 return hisi_hba->hw->prep_smp(hisi_hba, slot);
205 }
206
207 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
208 struct hisi_sas_slot *slot, int is_tmf,
209 struct hisi_sas_tmf_task *tmf)
210 {
211 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
212 }
213
214 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
215 struct hisi_sas_slot *slot)
216 {
217 return hisi_hba->hw->prep_stp(hisi_hba, slot);
218 }
219
220 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
221 struct hisi_sas_slot *slot,
222 int device_id, int abort_flag, int tag_to_abort)
223 {
224 return hisi_hba->hw->prep_abort(hisi_hba, slot,
225 device_id, abort_flag, tag_to_abort);
226 }
227
228 /*
229 * This function will issue an abort TMF regardless of whether the
230 * task is in the sdev or not. Then it will do the task complete
231 * cleanup and callbacks.
232 */
233 static void hisi_sas_slot_abort(struct work_struct *work)
234 {
235 struct hisi_sas_slot *abort_slot =
236 container_of(work, struct hisi_sas_slot, abort_slot);
237 struct sas_task *task = abort_slot->task;
238 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
239 struct scsi_cmnd *cmnd = task->uldd_task;
240 struct hisi_sas_tmf_task tmf_task;
241 struct scsi_lun lun;
242 struct device *dev = hisi_hba->dev;
243 int tag = abort_slot->idx;
244 unsigned long flags;
245
246 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
247 dev_err(dev, "cannot abort slot for non-ssp task\n");
248 goto out;
249 }
250
251 int_to_scsilun(cmnd->device->lun, &lun);
252 tmf_task.tmf = TMF_ABORT_TASK;
253 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
254
255 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
256 out:
257 /* Do cleanup for this task */
258 spin_lock_irqsave(&hisi_hba->lock, flags);
259 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
260 spin_unlock_irqrestore(&hisi_hba->lock, flags);
261 if (task->task_done)
262 task->task_done(task);
263 }
264
265 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
266 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
267 int *pass)
268 {
269 struct hisi_hba *hisi_hba = dq->hisi_hba;
270 struct domain_device *device = task->dev;
271 struct hisi_sas_device *sas_dev = device->lldd_dev;
272 struct hisi_sas_port *port;
273 struct hisi_sas_slot *slot;
274 struct hisi_sas_cmd_hdr *cmd_hdr_base;
275 struct asd_sas_port *sas_port = device->port;
276 struct device *dev = hisi_hba->dev;
277 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
278 unsigned long flags;
279
280 if (!sas_port) {
281 struct task_status_struct *ts = &task->task_status;
282
283 ts->resp = SAS_TASK_UNDELIVERED;
284 ts->stat = SAS_PHY_DOWN;
285 /*
286 * libsas will use dev->port, should
287 * not call task_done for sata
288 */
289 if (device->dev_type != SAS_SATA_DEV)
290 task->task_done(task);
291 return SAS_PHY_DOWN;
292 }
293
294 if (DEV_IS_GONE(sas_dev)) {
295 if (sas_dev)
296 dev_info(dev, "task prep: device %d not ready\n",
297 sas_dev->device_id);
298 else
299 dev_info(dev, "task prep: device %016llx not ready\n",
300 SAS_ADDR(device->sas_addr));
301
302 return SAS_PHY_DOWN;
303 }
304
305 port = to_hisi_sas_port(sas_port);
306 if (port && !port->port_attached) {
307 dev_info(dev, "task prep: %s port%d not attach device\n",
308 (dev_is_sata(device)) ?
309 "SATA/STP" : "SAS",
310 device->port->id);
311
312 return SAS_PHY_DOWN;
313 }
314
315 if (!sas_protocol_ata(task->task_proto)) {
316 if (task->num_scatter) {
317 n_elem = dma_map_sg(dev, task->scatter,
318 task->num_scatter, task->data_dir);
319 if (!n_elem) {
320 rc = -ENOMEM;
321 goto prep_out;
322 }
323 }
324 } else
325 n_elem = task->num_scatter;
326
327 spin_lock_irqsave(&hisi_hba->lock, flags);
328 if (hisi_hba->hw->slot_index_alloc)
329 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
330 device);
331 else
332 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
333 if (rc) {
334 spin_unlock_irqrestore(&hisi_hba->lock, flags);
335 goto err_out;
336 }
337 spin_unlock_irqrestore(&hisi_hba->lock, flags);
338
339 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
340 if (rc)
341 goto err_out_tag;
342
343 dlvry_queue = dq->id;
344 dlvry_queue_slot = dq->wr_point;
345 slot = &hisi_hba->slot_info[slot_idx];
346 memset(slot, 0, sizeof(struct hisi_sas_slot));
347
348 slot->idx = slot_idx;
349 slot->n_elem = n_elem;
350 slot->dlvry_queue = dlvry_queue;
351 slot->dlvry_queue_slot = dlvry_queue_slot;
352 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
353 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
354 slot->task = task;
355 slot->port = port;
356 task->lldd_task = slot;
357 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
358
359 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
360 GFP_ATOMIC, &slot->buf_dma);
361 if (!slot->buf) {
362 rc = -ENOMEM;
363 goto err_out_slot_buf;
364 }
365 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
366 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
367 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
368
369 switch (task->task_proto) {
370 case SAS_PROTOCOL_SMP:
371 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
372 break;
373 case SAS_PROTOCOL_SSP:
374 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
375 break;
376 case SAS_PROTOCOL_SATA:
377 case SAS_PROTOCOL_STP:
378 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
379 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
380 break;
381 default:
382 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
383 task->task_proto);
384 rc = -EINVAL;
385 break;
386 }
387
388 if (rc) {
389 dev_err(dev, "task prep: rc = 0x%x\n", rc);
390 goto err_out_buf;
391 }
392
393 list_add_tail(&slot->entry, &sas_dev->list);
394 spin_lock_irqsave(&task->task_state_lock, flags);
395 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
396 spin_unlock_irqrestore(&task->task_state_lock, flags);
397
398 dq->slot_prep = slot;
399
400 atomic64_inc(&sas_dev->running_req);
401 ++(*pass);
402
403 return 0;
404
405 err_out_buf:
406 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
407 slot->buf_dma);
408 err_out_slot_buf:
409 /* Nothing to be done */
410 err_out_tag:
411 spin_lock_irqsave(&hisi_hba->lock, flags);
412 hisi_sas_slot_index_free(hisi_hba, slot_idx);
413 spin_unlock_irqrestore(&hisi_hba->lock, flags);
414 err_out:
415 dev_err(dev, "task prep: failed[%d]!\n", rc);
416 if (!sas_protocol_ata(task->task_proto))
417 if (n_elem)
418 dma_unmap_sg(dev, task->scatter, n_elem,
419 task->data_dir);
420 prep_out:
421 return rc;
422 }
423
424 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
425 int is_tmf, struct hisi_sas_tmf_task *tmf)
426 {
427 u32 rc;
428 u32 pass = 0;
429 unsigned long flags;
430 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
431 struct device *dev = hisi_hba->dev;
432 struct domain_device *device = task->dev;
433 struct hisi_sas_device *sas_dev = device->lldd_dev;
434 struct hisi_sas_dq *dq = sas_dev->dq;
435
436 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
437 return -EINVAL;
438
439 /* protect task_prep and start_delivery sequence */
440 spin_lock_irqsave(&dq->lock, flags);
441 rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
442 if (rc)
443 dev_err(dev, "task exec: failed[%d]!\n", rc);
444
445 if (likely(pass))
446 hisi_hba->hw->start_delivery(dq);
447 spin_unlock_irqrestore(&dq->lock, flags);
448
449 return rc;
450 }
451
452 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
453 {
454 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
455 struct asd_sas_phy *sas_phy = &phy->sas_phy;
456 struct sas_ha_struct *sas_ha;
457
458 if (!phy->phy_attached)
459 return;
460
461 sas_ha = &hisi_hba->sha;
462 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
463
464 if (sas_phy->phy) {
465 struct sas_phy *sphy = sas_phy->phy;
466
467 sphy->negotiated_linkrate = sas_phy->linkrate;
468 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
469 sphy->maximum_linkrate_hw =
470 hisi_hba->hw->phy_get_max_linkrate();
471 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
472 sphy->minimum_linkrate = phy->minimum_linkrate;
473
474 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
475 sphy->maximum_linkrate = phy->maximum_linkrate;
476 }
477
478 if (phy->phy_type & PORT_TYPE_SAS) {
479 struct sas_identify_frame *id;
480
481 id = (struct sas_identify_frame *)phy->frame_rcvd;
482 id->dev_type = phy->identify.device_type;
483 id->initiator_bits = SAS_PROTOCOL_ALL;
484 id->target_bits = phy->identify.target_port_protocols;
485 } else if (phy->phy_type & PORT_TYPE_SATA) {
486 /*Nothing*/
487 }
488
489 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
490 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
491 }
492
493 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
494 {
495 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
496 struct hisi_sas_device *sas_dev = NULL;
497 int i;
498
499 spin_lock(&hisi_hba->lock);
500 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
501 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
502 int queue = i % hisi_hba->queue_count;
503 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
504
505 hisi_hba->devices[i].device_id = i;
506 sas_dev = &hisi_hba->devices[i];
507 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
508 sas_dev->dev_type = device->dev_type;
509 sas_dev->hisi_hba = hisi_hba;
510 sas_dev->sas_device = device;
511 sas_dev->dq = dq;
512 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
513 break;
514 }
515 }
516 spin_unlock(&hisi_hba->lock);
517
518 return sas_dev;
519 }
520
521 static int hisi_sas_dev_found(struct domain_device *device)
522 {
523 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
524 struct domain_device *parent_dev = device->parent;
525 struct hisi_sas_device *sas_dev;
526 struct device *dev = hisi_hba->dev;
527
528 if (hisi_hba->hw->alloc_dev)
529 sas_dev = hisi_hba->hw->alloc_dev(device);
530 else
531 sas_dev = hisi_sas_alloc_dev(device);
532 if (!sas_dev) {
533 dev_err(dev, "fail alloc dev: max support %d devices\n",
534 HISI_SAS_MAX_DEVICES);
535 return -EINVAL;
536 }
537
538 device->lldd_dev = sas_dev;
539 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
540
541 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
542 int phy_no;
543 u8 phy_num = parent_dev->ex_dev.num_phys;
544 struct ex_phy *phy;
545
546 for (phy_no = 0; phy_no < phy_num; phy_no++) {
547 phy = &parent_dev->ex_dev.ex_phy[phy_no];
548 if (SAS_ADDR(phy->attached_sas_addr) ==
549 SAS_ADDR(device->sas_addr)) {
550 sas_dev->attached_phy = phy_no;
551 break;
552 }
553 }
554
555 if (phy_no == phy_num) {
556 dev_info(dev, "dev found: no attached "
557 "dev:%016llx at ex:%016llx\n",
558 SAS_ADDR(device->sas_addr),
559 SAS_ADDR(parent_dev->sas_addr));
560 return -EINVAL;
561 }
562 }
563
564 return 0;
565 }
566
567 static int hisi_sas_slave_configure(struct scsi_device *sdev)
568 {
569 struct domain_device *dev = sdev_to_domain_dev(sdev);
570 int ret = sas_slave_configure(sdev);
571
572 if (ret)
573 return ret;
574 if (!dev_is_sata(dev))
575 sas_change_queue_depth(sdev, 64);
576
577 return 0;
578 }
579
580 static void hisi_sas_scan_start(struct Scsi_Host *shost)
581 {
582 struct hisi_hba *hisi_hba = shost_priv(shost);
583
584 hisi_hba->hw->phys_init(hisi_hba);
585 }
586
587 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
588 {
589 struct hisi_hba *hisi_hba = shost_priv(shost);
590 struct sas_ha_struct *sha = &hisi_hba->sha;
591
592 /* Wait for PHY up interrupt to occur */
593 if (time < HZ)
594 return 0;
595
596 sas_drain_work(sha);
597 return 1;
598 }
599
600 static void hisi_sas_phyup_work(struct work_struct *work)
601 {
602 struct hisi_sas_phy *phy =
603 container_of(work, struct hisi_sas_phy, phyup_ws);
604 struct hisi_hba *hisi_hba = phy->hisi_hba;
605 struct asd_sas_phy *sas_phy = &phy->sas_phy;
606 int phy_no = sas_phy->id;
607
608 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
609 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
610 }
611
612 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
613 {
614 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
615 struct asd_sas_phy *sas_phy = &phy->sas_phy;
616
617 phy->hisi_hba = hisi_hba;
618 phy->port = NULL;
619 init_timer(&phy->timer);
620 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
621 sas_phy->class = SAS;
622 sas_phy->iproto = SAS_PROTOCOL_ALL;
623 sas_phy->tproto = 0;
624 sas_phy->type = PHY_TYPE_PHYSICAL;
625 sas_phy->role = PHY_ROLE_INITIATOR;
626 sas_phy->oob_mode = OOB_NOT_CONNECTED;
627 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
628 sas_phy->id = phy_no;
629 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
630 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
631 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
632 sas_phy->lldd_phy = phy;
633
634 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
635 }
636
637 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
638 {
639 struct sas_ha_struct *sas_ha = sas_phy->ha;
640 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
641 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
642 struct asd_sas_port *sas_port = sas_phy->port;
643 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
644 unsigned long flags;
645
646 if (!sas_port)
647 return;
648
649 spin_lock_irqsave(&hisi_hba->lock, flags);
650 port->port_attached = 1;
651 port->id = phy->port_id;
652 phy->port = port;
653 sas_port->lldd_port = port;
654 spin_unlock_irqrestore(&hisi_hba->lock, flags);
655 }
656
657 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
658 struct hisi_sas_slot *slot)
659 {
660 if (task) {
661 unsigned long flags;
662 struct task_status_struct *ts;
663
664 ts = &task->task_status;
665
666 ts->resp = SAS_TASK_COMPLETE;
667 ts->stat = SAS_ABORTED_TASK;
668 spin_lock_irqsave(&task->task_state_lock, flags);
669 task->task_state_flags &=
670 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
671 task->task_state_flags |= SAS_TASK_STATE_DONE;
672 spin_unlock_irqrestore(&task->task_state_lock, flags);
673 }
674
675 hisi_sas_slot_task_free(hisi_hba, task, slot);
676 }
677
678 /* hisi_hba.lock should be locked */
679 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
680 struct domain_device *device)
681 {
682 struct hisi_sas_slot *slot, *slot2;
683 struct hisi_sas_device *sas_dev = device->lldd_dev;
684
685 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
686 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
687 }
688
689 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
690 {
691 struct hisi_sas_device *sas_dev;
692 struct domain_device *device;
693 int i;
694
695 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
696 sas_dev = &hisi_hba->devices[i];
697 device = sas_dev->sas_device;
698
699 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
700 !device)
701 continue;
702
703 hisi_sas_release_task(hisi_hba, device);
704 }
705 }
706
707 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
708 struct domain_device *device)
709 {
710 if (hisi_hba->hw->dereg_device)
711 hisi_hba->hw->dereg_device(hisi_hba, device);
712 }
713
714 static void hisi_sas_dev_gone(struct domain_device *device)
715 {
716 struct hisi_sas_device *sas_dev = device->lldd_dev;
717 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
718 struct device *dev = hisi_hba->dev;
719 int dev_id = sas_dev->device_id;
720
721 dev_info(dev, "found dev[%d:%x] is gone\n",
722 sas_dev->device_id, sas_dev->dev_type);
723
724 hisi_sas_internal_task_abort(hisi_hba, device,
725 HISI_SAS_INT_ABT_DEV, 0);
726
727 hisi_sas_dereg_device(hisi_hba, device);
728
729 hisi_hba->hw->free_device(hisi_hba, sas_dev);
730 device->lldd_dev = NULL;
731 memset(sas_dev, 0, sizeof(*sas_dev));
732 sas_dev->device_id = dev_id;
733 sas_dev->dev_type = SAS_PHY_UNUSED;
734 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
735 }
736
737 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
738 {
739 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
740 }
741
742 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
743 void *funcdata)
744 {
745 struct sas_ha_struct *sas_ha = sas_phy->ha;
746 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
747 int phy_no = sas_phy->id;
748
749 switch (func) {
750 case PHY_FUNC_HARD_RESET:
751 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
752 break;
753
754 case PHY_FUNC_LINK_RESET:
755 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
756 msleep(100);
757 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
758 break;
759
760 case PHY_FUNC_DISABLE:
761 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
762 break;
763
764 case PHY_FUNC_SET_LINK_RATE:
765 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
766 break;
767
768 case PHY_FUNC_RELEASE_SPINUP_HOLD:
769 default:
770 return -EOPNOTSUPP;
771 }
772 return 0;
773 }
774
775 static void hisi_sas_task_done(struct sas_task *task)
776 {
777 if (!del_timer(&task->slow_task->timer))
778 return;
779 complete(&task->slow_task->completion);
780 }
781
782 static void hisi_sas_tmf_timedout(unsigned long data)
783 {
784 struct sas_task *task = (struct sas_task *)data;
785 unsigned long flags;
786
787 spin_lock_irqsave(&task->task_state_lock, flags);
788 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
789 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
790 spin_unlock_irqrestore(&task->task_state_lock, flags);
791
792 complete(&task->slow_task->completion);
793 }
794
795 #define TASK_TIMEOUT 20
796 #define TASK_RETRY 3
797 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
798 void *parameter, u32 para_len,
799 struct hisi_sas_tmf_task *tmf)
800 {
801 struct hisi_sas_device *sas_dev = device->lldd_dev;
802 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
803 struct device *dev = hisi_hba->dev;
804 struct sas_task *task;
805 int res, retry;
806
807 for (retry = 0; retry < TASK_RETRY; retry++) {
808 task = sas_alloc_slow_task(GFP_KERNEL);
809 if (!task)
810 return -ENOMEM;
811
812 task->dev = device;
813 task->task_proto = device->tproto;
814
815 if (dev_is_sata(device)) {
816 task->ata_task.device_control_reg_update = 1;
817 memcpy(&task->ata_task.fis, parameter, para_len);
818 } else {
819 memcpy(&task->ssp_task, parameter, para_len);
820 }
821 task->task_done = hisi_sas_task_done;
822
823 task->slow_task->timer.data = (unsigned long) task;
824 task->slow_task->timer.function = hisi_sas_tmf_timedout;
825 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
826 add_timer(&task->slow_task->timer);
827
828 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
829
830 if (res) {
831 del_timer(&task->slow_task->timer);
832 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
833 res);
834 goto ex_err;
835 }
836
837 wait_for_completion(&task->slow_task->completion);
838 res = TMF_RESP_FUNC_FAILED;
839 /* Even TMF timed out, return direct. */
840 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
841 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
842 struct hisi_sas_slot *slot = task->lldd_task;
843
844 dev_err(dev, "abort tmf: TMF task timeout\n");
845 if (slot)
846 slot->task = NULL;
847
848 goto ex_err;
849 }
850 }
851
852 if (task->task_status.resp == SAS_TASK_COMPLETE &&
853 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
854 res = TMF_RESP_FUNC_COMPLETE;
855 break;
856 }
857
858 if (task->task_status.resp == SAS_TASK_COMPLETE &&
859 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
860 res = TMF_RESP_FUNC_SUCC;
861 break;
862 }
863
864 if (task->task_status.resp == SAS_TASK_COMPLETE &&
865 task->task_status.stat == SAS_DATA_UNDERRUN) {
866 /* no error, but return the number of bytes of
867 * underrun
868 */
869 dev_warn(dev, "abort tmf: task to dev %016llx "
870 "resp: 0x%x sts 0x%x underrun\n",
871 SAS_ADDR(device->sas_addr),
872 task->task_status.resp,
873 task->task_status.stat);
874 res = task->task_status.residual;
875 break;
876 }
877
878 if (task->task_status.resp == SAS_TASK_COMPLETE &&
879 task->task_status.stat == SAS_DATA_OVERRUN) {
880 dev_warn(dev, "abort tmf: blocked task error\n");
881 res = -EMSGSIZE;
882 break;
883 }
884
885 dev_warn(dev, "abort tmf: task to dev "
886 "%016llx resp: 0x%x status 0x%x\n",
887 SAS_ADDR(device->sas_addr), task->task_status.resp,
888 task->task_status.stat);
889 sas_free_task(task);
890 task = NULL;
891 }
892 ex_err:
893 if (retry == TASK_RETRY)
894 dev_warn(dev, "abort tmf: executing internal task failed!\n");
895 sas_free_task(task);
896 return res;
897 }
898
899 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
900 bool reset, int pmp, u8 *fis)
901 {
902 struct ata_taskfile tf;
903
904 ata_tf_init(dev, &tf);
905 if (reset)
906 tf.ctl |= ATA_SRST;
907 else
908 tf.ctl &= ~ATA_SRST;
909 tf.command = ATA_CMD_DEV_RESET;
910 ata_tf_to_fis(&tf, pmp, 0, fis);
911 }
912
913 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
914 {
915 u8 fis[20] = {0};
916 struct ata_port *ap = device->sata_dev.ap;
917 struct ata_link *link;
918 int rc = TMF_RESP_FUNC_FAILED;
919 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
920 struct device *dev = hisi_hba->dev;
921 int s = sizeof(struct host_to_dev_fis);
922 unsigned long flags;
923
924 ata_for_each_link(link, ap, EDGE) {
925 int pmp = sata_srst_pmp(link);
926
927 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
928 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
929 if (rc != TMF_RESP_FUNC_COMPLETE)
930 break;
931 }
932
933 if (rc == TMF_RESP_FUNC_COMPLETE) {
934 ata_for_each_link(link, ap, EDGE) {
935 int pmp = sata_srst_pmp(link);
936
937 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
938 rc = hisi_sas_exec_internal_tmf_task(device, fis,
939 s, NULL);
940 if (rc != TMF_RESP_FUNC_COMPLETE)
941 dev_err(dev, "ata disk de-reset failed\n");
942 }
943 } else {
944 dev_err(dev, "ata disk reset failed\n");
945 }
946
947 if (rc == TMF_RESP_FUNC_COMPLETE) {
948 spin_lock_irqsave(&hisi_hba->lock, flags);
949 hisi_sas_release_task(hisi_hba, device);
950 spin_unlock_irqrestore(&hisi_hba->lock, flags);
951 }
952
953 return rc;
954 }
955
956 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
957 u8 *lun, struct hisi_sas_tmf_task *tmf)
958 {
959 struct sas_ssp_task ssp_task;
960
961 if (!(device->tproto & SAS_PROTOCOL_SSP))
962 return TMF_RESP_FUNC_ESUPP;
963
964 memcpy(ssp_task.LUN, lun, 8);
965
966 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
967 sizeof(ssp_task), tmf);
968 }
969
970 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
971 {
972 int rc;
973
974 if (!hisi_hba->hw->soft_reset)
975 return -1;
976
977 if (!test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
978 struct device *dev = hisi_hba->dev;
979 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
980 unsigned long flags;
981
982 dev_dbg(dev, "controller reset begins!\n");
983 scsi_block_requests(hisi_hba->shost);
984 rc = hisi_hba->hw->soft_reset(hisi_hba);
985 if (rc) {
986 dev_warn(dev, "controller reset failed (%d)\n", rc);
987 goto out;
988 }
989 spin_lock_irqsave(&hisi_hba->lock, flags);
990 hisi_sas_release_tasks(hisi_hba);
991 spin_unlock_irqrestore(&hisi_hba->lock, flags);
992
993 sas_ha->notify_ha_event(sas_ha, HAE_RESET);
994 dev_dbg(dev, "controller reset successful!\n");
995 } else
996 return -1;
997
998 out:
999 scsi_unblock_requests(hisi_hba->shost);
1000 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1001 return rc;
1002 }
1003
1004 static int hisi_sas_abort_task(struct sas_task *task)
1005 {
1006 struct scsi_lun lun;
1007 struct hisi_sas_tmf_task tmf_task;
1008 struct domain_device *device = task->dev;
1009 struct hisi_sas_device *sas_dev = device->lldd_dev;
1010 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1011 struct device *dev = hisi_hba->dev;
1012 int rc = TMF_RESP_FUNC_FAILED;
1013 unsigned long flags;
1014
1015 if (!sas_dev) {
1016 dev_warn(dev, "Device has been removed\n");
1017 return TMF_RESP_FUNC_FAILED;
1018 }
1019
1020 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1021 rc = TMF_RESP_FUNC_COMPLETE;
1022 goto out;
1023 }
1024
1025 sas_dev->dev_status = HISI_SAS_DEV_EH;
1026 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1027 struct scsi_cmnd *cmnd = task->uldd_task;
1028 struct hisi_sas_slot *slot = task->lldd_task;
1029 u32 tag = slot->idx;
1030 int rc2;
1031
1032 int_to_scsilun(cmnd->device->lun, &lun);
1033 tmf_task.tmf = TMF_ABORT_TASK;
1034 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1035
1036 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1037 &tmf_task);
1038
1039 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1040 HISI_SAS_INT_ABT_CMD, tag);
1041 /*
1042 * If the TMF finds that the IO is not in the device and also
1043 * the internal abort does not succeed, then it is safe to
1044 * free the slot.
1045 * Note: if the internal abort succeeds then the slot
1046 * will have already been completed
1047 */
1048 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1049 if (task->lldd_task) {
1050 spin_lock_irqsave(&hisi_hba->lock, flags);
1051 hisi_sas_do_release_task(hisi_hba, task, slot);
1052 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1053 }
1054 }
1055 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1056 task->task_proto & SAS_PROTOCOL_STP) {
1057 if (task->dev->dev_type == SAS_SATA_DEV) {
1058 hisi_sas_internal_task_abort(hisi_hba, device,
1059 HISI_SAS_INT_ABT_DEV, 0);
1060 hisi_sas_dereg_device(hisi_hba, device);
1061 rc = hisi_sas_softreset_ata_disk(device);
1062 }
1063 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1064 /* SMP */
1065 struct hisi_sas_slot *slot = task->lldd_task;
1066 u32 tag = slot->idx;
1067
1068 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1069 HISI_SAS_INT_ABT_CMD, tag);
1070 if (rc == TMF_RESP_FUNC_FAILED) {
1071 spin_lock_irqsave(&hisi_hba->lock, flags);
1072 hisi_sas_do_release_task(hisi_hba, task, slot);
1073 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1074 }
1075 }
1076
1077 out:
1078 if (rc != TMF_RESP_FUNC_COMPLETE)
1079 dev_notice(dev, "abort task: rc=%d\n", rc);
1080 return rc;
1081 }
1082
1083 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1084 {
1085 struct hisi_sas_tmf_task tmf_task;
1086 int rc = TMF_RESP_FUNC_FAILED;
1087
1088 tmf_task.tmf = TMF_ABORT_TASK_SET;
1089 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1090
1091 return rc;
1092 }
1093
1094 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1095 {
1096 int rc = TMF_RESP_FUNC_FAILED;
1097 struct hisi_sas_tmf_task tmf_task;
1098
1099 tmf_task.tmf = TMF_CLEAR_ACA;
1100 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1101
1102 return rc;
1103 }
1104
1105 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1106 {
1107 struct sas_phy *phy = sas_get_local_phy(device);
1108 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1109 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1110 rc = sas_phy_reset(phy, reset_type);
1111 sas_put_local_phy(phy);
1112 msleep(2000);
1113 return rc;
1114 }
1115
1116 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1117 {
1118 struct hisi_sas_device *sas_dev = device->lldd_dev;
1119 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1120 unsigned long flags;
1121 int rc = TMF_RESP_FUNC_FAILED;
1122
1123 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1124 return TMF_RESP_FUNC_FAILED;
1125 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1126
1127 hisi_sas_internal_task_abort(hisi_hba, device,
1128 HISI_SAS_INT_ABT_DEV, 0);
1129 hisi_sas_dereg_device(hisi_hba, device);
1130
1131 rc = hisi_sas_debug_I_T_nexus_reset(device);
1132
1133 if (rc == TMF_RESP_FUNC_COMPLETE) {
1134 spin_lock_irqsave(&hisi_hba->lock, flags);
1135 hisi_sas_release_task(hisi_hba, device);
1136 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1137 }
1138 return rc;
1139 }
1140
1141 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1142 {
1143 struct hisi_sas_device *sas_dev = device->lldd_dev;
1144 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1145 struct device *dev = hisi_hba->dev;
1146 unsigned long flags;
1147 int rc = TMF_RESP_FUNC_FAILED;
1148
1149 sas_dev->dev_status = HISI_SAS_DEV_EH;
1150 if (dev_is_sata(device)) {
1151 struct sas_phy *phy;
1152
1153 /* Clear internal IO and then hardreset */
1154 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1155 HISI_SAS_INT_ABT_DEV, 0);
1156 if (rc == TMF_RESP_FUNC_FAILED)
1157 goto out;
1158 hisi_sas_dereg_device(hisi_hba, device);
1159
1160 phy = sas_get_local_phy(device);
1161
1162 rc = sas_phy_reset(phy, 1);
1163
1164 if (rc == 0) {
1165 spin_lock_irqsave(&hisi_hba->lock, flags);
1166 hisi_sas_release_task(hisi_hba, device);
1167 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1168 }
1169 sas_put_local_phy(phy);
1170 } else {
1171 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1172
1173 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1174 if (rc == TMF_RESP_FUNC_COMPLETE) {
1175 spin_lock_irqsave(&hisi_hba->lock, flags);
1176 hisi_sas_release_task(hisi_hba, device);
1177 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1178 }
1179 }
1180 out:
1181 if (rc != TMF_RESP_FUNC_COMPLETE)
1182 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1183 sas_dev->device_id, rc);
1184 return rc;
1185 }
1186
1187 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1188 {
1189 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1190
1191 return hisi_sas_controller_reset(hisi_hba);
1192 }
1193
1194 static int hisi_sas_query_task(struct sas_task *task)
1195 {
1196 struct scsi_lun lun;
1197 struct hisi_sas_tmf_task tmf_task;
1198 int rc = TMF_RESP_FUNC_FAILED;
1199
1200 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1201 struct scsi_cmnd *cmnd = task->uldd_task;
1202 struct domain_device *device = task->dev;
1203 struct hisi_sas_slot *slot = task->lldd_task;
1204 u32 tag = slot->idx;
1205
1206 int_to_scsilun(cmnd->device->lun, &lun);
1207 tmf_task.tmf = TMF_QUERY_TASK;
1208 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1209
1210 rc = hisi_sas_debug_issue_ssp_tmf(device,
1211 lun.scsi_lun,
1212 &tmf_task);
1213 switch (rc) {
1214 /* The task is still in Lun, release it then */
1215 case TMF_RESP_FUNC_SUCC:
1216 /* The task is not in Lun or failed, reset the phy */
1217 case TMF_RESP_FUNC_FAILED:
1218 case TMF_RESP_FUNC_COMPLETE:
1219 break;
1220 default:
1221 rc = TMF_RESP_FUNC_FAILED;
1222 break;
1223 }
1224 }
1225 return rc;
1226 }
1227
1228 static int
1229 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1230 struct sas_task *task, int abort_flag,
1231 int task_tag)
1232 {
1233 struct domain_device *device = task->dev;
1234 struct hisi_sas_device *sas_dev = device->lldd_dev;
1235 struct device *dev = hisi_hba->dev;
1236 struct hisi_sas_port *port;
1237 struct hisi_sas_slot *slot;
1238 struct asd_sas_port *sas_port = device->port;
1239 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1240 struct hisi_sas_dq *dq = sas_dev->dq;
1241 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1242 unsigned long flags, flags_dq;
1243
1244 if (unlikely(test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)))
1245 return -EINVAL;
1246
1247 if (!device->port)
1248 return -1;
1249
1250 port = to_hisi_sas_port(sas_port);
1251
1252 /* simply get a slot and send abort command */
1253 spin_lock_irqsave(&hisi_hba->lock, flags);
1254 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1255 if (rc) {
1256 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1257 goto err_out;
1258 }
1259 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1260
1261 spin_lock_irqsave(&dq->lock, flags_dq);
1262 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1263 if (rc)
1264 goto err_out_tag;
1265
1266 dlvry_queue = dq->id;
1267 dlvry_queue_slot = dq->wr_point;
1268
1269 slot = &hisi_hba->slot_info[slot_idx];
1270 memset(slot, 0, sizeof(struct hisi_sas_slot));
1271
1272 slot->idx = slot_idx;
1273 slot->n_elem = n_elem;
1274 slot->dlvry_queue = dlvry_queue;
1275 slot->dlvry_queue_slot = dlvry_queue_slot;
1276 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1277 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1278 slot->task = task;
1279 slot->port = port;
1280 task->lldd_task = slot;
1281
1282 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1283
1284 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1285 abort_flag, task_tag);
1286 if (rc)
1287 goto err_out_tag;
1288
1289
1290 list_add_tail(&slot->entry, &sas_dev->list);
1291 spin_lock_irqsave(&task->task_state_lock, flags);
1292 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1293 spin_unlock_irqrestore(&task->task_state_lock, flags);
1294
1295 dq->slot_prep = slot;
1296
1297 atomic64_inc(&sas_dev->running_req);
1298
1299 /* send abort command to the chip */
1300 hisi_hba->hw->start_delivery(dq);
1301 spin_unlock_irqrestore(&dq->lock, flags_dq);
1302
1303 return 0;
1304
1305 err_out_tag:
1306 spin_lock_irqsave(&hisi_hba->lock, flags);
1307 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1308 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1309 spin_unlock_irqrestore(&dq->lock, flags_dq);
1310 err_out:
1311 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1312
1313 return rc;
1314 }
1315
1316 /**
1317 * hisi_sas_internal_task_abort -- execute an internal
1318 * abort command for single IO command or a device
1319 * @hisi_hba: host controller struct
1320 * @device: domain device
1321 * @abort_flag: mode of operation, device or single IO
1322 * @tag: tag of IO to be aborted (only relevant to single
1323 * IO mode)
1324 */
1325 static int
1326 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1327 struct domain_device *device,
1328 int abort_flag, int tag)
1329 {
1330 struct sas_task *task;
1331 struct hisi_sas_device *sas_dev = device->lldd_dev;
1332 struct device *dev = hisi_hba->dev;
1333 int res;
1334
1335 if (!hisi_hba->hw->prep_abort)
1336 return -EOPNOTSUPP;
1337
1338 task = sas_alloc_slow_task(GFP_KERNEL);
1339 if (!task)
1340 return -ENOMEM;
1341
1342 task->dev = device;
1343 task->task_proto = device->tproto;
1344 task->task_done = hisi_sas_task_done;
1345 task->slow_task->timer.data = (unsigned long)task;
1346 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1347 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1348 add_timer(&task->slow_task->timer);
1349
1350 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1351 task, abort_flag, tag);
1352 if (res) {
1353 del_timer(&task->slow_task->timer);
1354 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1355 res);
1356 goto exit;
1357 }
1358 wait_for_completion(&task->slow_task->completion);
1359 res = TMF_RESP_FUNC_FAILED;
1360
1361 /* Internal abort timed out */
1362 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1363 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1364 struct hisi_sas_slot *slot = task->lldd_task;
1365
1366 if (slot)
1367 slot->task = NULL;
1368 dev_err(dev, "internal task abort: timeout.\n");
1369 }
1370 }
1371
1372 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1373 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1374 res = TMF_RESP_FUNC_COMPLETE;
1375 goto exit;
1376 }
1377
1378 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1379 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1380 res = TMF_RESP_FUNC_SUCC;
1381 goto exit;
1382 }
1383
1384 exit:
1385 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1386 "resp: 0x%x sts 0x%x\n",
1387 SAS_ADDR(device->sas_addr),
1388 task,
1389 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1390 task->task_status.stat);
1391 sas_free_task(task);
1392
1393 return res;
1394 }
1395
1396 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1397 {
1398 hisi_sas_port_notify_formed(sas_phy);
1399 }
1400
1401 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1402 {
1403 phy->phy_attached = 0;
1404 phy->phy_type = 0;
1405 phy->port = NULL;
1406 }
1407
1408 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1409 {
1410 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1411 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1412 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1413
1414 if (rdy) {
1415 /* Phy down but ready */
1416 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1417 hisi_sas_port_notify_formed(sas_phy);
1418 } else {
1419 struct hisi_sas_port *port = phy->port;
1420
1421 /* Phy down and not ready */
1422 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1423 sas_phy_disconnected(sas_phy);
1424
1425 if (port) {
1426 if (phy->phy_type & PORT_TYPE_SAS) {
1427 int port_id = port->id;
1428
1429 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1430 port_id))
1431 port->port_attached = 0;
1432 } else if (phy->phy_type & PORT_TYPE_SATA)
1433 port->port_attached = 0;
1434 }
1435 hisi_sas_phy_disconnected(phy);
1436 }
1437 }
1438 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1439
1440 void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1441 u32 state)
1442 {
1443 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1444 int phy_no;
1445
1446 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1447 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1448 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1449 struct asd_sas_port *sas_port = sas_phy->port;
1450 struct domain_device *dev;
1451
1452 if (sas_phy->enabled) {
1453 /* Report PHY state change to libsas */
1454 if (state & (1 << phy_no))
1455 continue;
1456
1457 if (old_state & (1 << phy_no))
1458 /* PHY down but was up before */
1459 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1460 }
1461 if (!sas_port)
1462 continue;
1463 dev = sas_port->port_dev;
1464
1465 if (DEV_IS_EXPANDER(dev->dev_type))
1466 sas_ha->notify_phy_event(sas_phy, PORTE_BROADCAST_RCVD);
1467 }
1468 }
1469 EXPORT_SYMBOL_GPL(hisi_sas_rescan_topology);
1470
1471 struct scsi_transport_template *hisi_sas_stt;
1472 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1473
1474 static struct scsi_host_template _hisi_sas_sht = {
1475 .module = THIS_MODULE,
1476 .name = DRV_NAME,
1477 .queuecommand = sas_queuecommand,
1478 .target_alloc = sas_target_alloc,
1479 .slave_configure = hisi_sas_slave_configure,
1480 .scan_finished = hisi_sas_scan_finished,
1481 .scan_start = hisi_sas_scan_start,
1482 .change_queue_depth = sas_change_queue_depth,
1483 .bios_param = sas_bios_param,
1484 .can_queue = 1,
1485 .this_id = -1,
1486 .sg_tablesize = SG_ALL,
1487 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1488 .use_clustering = ENABLE_CLUSTERING,
1489 .eh_device_reset_handler = sas_eh_device_reset_handler,
1490 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1491 .target_destroy = sas_target_destroy,
1492 .ioctl = sas_ioctl,
1493 };
1494 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1495 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1496
1497 static struct sas_domain_function_template hisi_sas_transport_ops = {
1498 .lldd_dev_found = hisi_sas_dev_found,
1499 .lldd_dev_gone = hisi_sas_dev_gone,
1500 .lldd_execute_task = hisi_sas_queue_command,
1501 .lldd_control_phy = hisi_sas_control_phy,
1502 .lldd_abort_task = hisi_sas_abort_task,
1503 .lldd_abort_task_set = hisi_sas_abort_task_set,
1504 .lldd_clear_aca = hisi_sas_clear_aca,
1505 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1506 .lldd_lu_reset = hisi_sas_lu_reset,
1507 .lldd_query_task = hisi_sas_query_task,
1508 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1509 .lldd_port_formed = hisi_sas_port_formed,
1510 };
1511
1512 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1513 {
1514 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1515
1516 for (i = 0; i < hisi_hba->queue_count; i++) {
1517 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1518 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1519
1520 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1521 memset(hisi_hba->cmd_hdr[i], 0, s);
1522 dq->wr_point = 0;
1523
1524 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1525 memset(hisi_hba->complete_hdr[i], 0, s);
1526 cq->rd_point = 0;
1527 }
1528
1529 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1530 memset(hisi_hba->initial_fis, 0, s);
1531
1532 s = max_command_entries * sizeof(struct hisi_sas_iost);
1533 memset(hisi_hba->iost, 0, s);
1534
1535 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1536 memset(hisi_hba->breakpoint, 0, s);
1537
1538 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1539 memset(hisi_hba->sata_breakpoint, 0, s);
1540 }
1541 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1542
1543 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1544 {
1545 struct device *dev = hisi_hba->dev;
1546 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1547
1548 spin_lock_init(&hisi_hba->lock);
1549 for (i = 0; i < hisi_hba->n_phy; i++) {
1550 hisi_sas_phy_init(hisi_hba, i);
1551 hisi_hba->port[i].port_attached = 0;
1552 hisi_hba->port[i].id = -1;
1553 }
1554
1555 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1556 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1557 hisi_hba->devices[i].device_id = i;
1558 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1559 }
1560
1561 for (i = 0; i < hisi_hba->queue_count; i++) {
1562 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1563 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1564
1565 /* Completion queue structure */
1566 cq->id = i;
1567 cq->hisi_hba = hisi_hba;
1568
1569 /* Delivery queue structure */
1570 dq->id = i;
1571 dq->hisi_hba = hisi_hba;
1572
1573 /* Delivery queue */
1574 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1575 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1576 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1577 if (!hisi_hba->cmd_hdr[i])
1578 goto err_out;
1579
1580 /* Completion queue */
1581 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1582 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1583 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1584 if (!hisi_hba->complete_hdr[i])
1585 goto err_out;
1586 }
1587
1588 s = sizeof(struct hisi_sas_slot_buf_table);
1589 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1590 if (!hisi_hba->buffer_pool)
1591 goto err_out;
1592
1593 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1594 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1595 GFP_KERNEL);
1596 if (!hisi_hba->itct)
1597 goto err_out;
1598
1599 memset(hisi_hba->itct, 0, s);
1600
1601 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1602 sizeof(struct hisi_sas_slot),
1603 GFP_KERNEL);
1604 if (!hisi_hba->slot_info)
1605 goto err_out;
1606
1607 s = max_command_entries * sizeof(struct hisi_sas_iost);
1608 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1609 GFP_KERNEL);
1610 if (!hisi_hba->iost)
1611 goto err_out;
1612
1613 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1614 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1615 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1616 if (!hisi_hba->breakpoint)
1617 goto err_out;
1618
1619 hisi_hba->slot_index_count = max_command_entries;
1620 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1621 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1622 if (!hisi_hba->slot_index_tags)
1623 goto err_out;
1624
1625 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1626 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1627 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1628 if (!hisi_hba->initial_fis)
1629 goto err_out;
1630
1631 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1632 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1633 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1634 if (!hisi_hba->sata_breakpoint)
1635 goto err_out;
1636 hisi_sas_init_mem(hisi_hba);
1637
1638 hisi_sas_slot_index_init(hisi_hba);
1639
1640 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1641 if (!hisi_hba->wq) {
1642 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1643 goto err_out;
1644 }
1645
1646 return 0;
1647 err_out:
1648 return -ENOMEM;
1649 }
1650 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1651
1652 void hisi_sas_free(struct hisi_hba *hisi_hba)
1653 {
1654 struct device *dev = hisi_hba->dev;
1655 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1656
1657 for (i = 0; i < hisi_hba->queue_count; i++) {
1658 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1659 if (hisi_hba->cmd_hdr[i])
1660 dma_free_coherent(dev, s,
1661 hisi_hba->cmd_hdr[i],
1662 hisi_hba->cmd_hdr_dma[i]);
1663
1664 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1665 if (hisi_hba->complete_hdr[i])
1666 dma_free_coherent(dev, s,
1667 hisi_hba->complete_hdr[i],
1668 hisi_hba->complete_hdr_dma[i]);
1669 }
1670
1671 dma_pool_destroy(hisi_hba->buffer_pool);
1672
1673 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1674 if (hisi_hba->itct)
1675 dma_free_coherent(dev, s,
1676 hisi_hba->itct, hisi_hba->itct_dma);
1677
1678 s = max_command_entries * sizeof(struct hisi_sas_iost);
1679 if (hisi_hba->iost)
1680 dma_free_coherent(dev, s,
1681 hisi_hba->iost, hisi_hba->iost_dma);
1682
1683 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1684 if (hisi_hba->breakpoint)
1685 dma_free_coherent(dev, s,
1686 hisi_hba->breakpoint,
1687 hisi_hba->breakpoint_dma);
1688
1689
1690 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1691 if (hisi_hba->initial_fis)
1692 dma_free_coherent(dev, s,
1693 hisi_hba->initial_fis,
1694 hisi_hba->initial_fis_dma);
1695
1696 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1697 if (hisi_hba->sata_breakpoint)
1698 dma_free_coherent(dev, s,
1699 hisi_hba->sata_breakpoint,
1700 hisi_hba->sata_breakpoint_dma);
1701
1702 if (hisi_hba->wq)
1703 destroy_workqueue(hisi_hba->wq);
1704 }
1705 EXPORT_SYMBOL_GPL(hisi_sas_free);
1706
1707 static void hisi_sas_rst_work_handler(struct work_struct *work)
1708 {
1709 struct hisi_hba *hisi_hba =
1710 container_of(work, struct hisi_hba, rst_work);
1711
1712 hisi_sas_controller_reset(hisi_hba);
1713 }
1714
1715 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1716 {
1717 struct device *dev = hisi_hba->dev;
1718 struct platform_device *pdev = hisi_hba->platform_dev;
1719 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1720 struct clk *refclk;
1721
1722 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1723 SAS_ADDR_SIZE)) {
1724 dev_err(dev, "could not get property sas-addr\n");
1725 return -ENOENT;
1726 }
1727
1728 if (np) {
1729 /*
1730 * These properties are only required for platform device-based
1731 * controller with DT firmware.
1732 */
1733 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1734 "hisilicon,sas-syscon");
1735 if (IS_ERR(hisi_hba->ctrl)) {
1736 dev_err(dev, "could not get syscon\n");
1737 return -ENOENT;
1738 }
1739
1740 if (device_property_read_u32(dev, "ctrl-reset-reg",
1741 &hisi_hba->ctrl_reset_reg)) {
1742 dev_err(dev,
1743 "could not get property ctrl-reset-reg\n");
1744 return -ENOENT;
1745 }
1746
1747 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1748 &hisi_hba->ctrl_reset_sts_reg)) {
1749 dev_err(dev,
1750 "could not get property ctrl-reset-sts-reg\n");
1751 return -ENOENT;
1752 }
1753
1754 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1755 &hisi_hba->ctrl_clock_ena_reg)) {
1756 dev_err(dev,
1757 "could not get property ctrl-clock-ena-reg\n");
1758 return -ENOENT;
1759 }
1760 }
1761
1762 refclk = devm_clk_get(dev, NULL);
1763 if (IS_ERR(refclk))
1764 dev_dbg(dev, "no ref clk property\n");
1765 else
1766 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1767
1768 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
1769 dev_err(dev, "could not get property phy-count\n");
1770 return -ENOENT;
1771 }
1772
1773 if (device_property_read_u32(dev, "queue-count",
1774 &hisi_hba->queue_count)) {
1775 dev_err(dev, "could not get property queue-count\n");
1776 return -ENOENT;
1777 }
1778
1779 return 0;
1780 }
1781 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
1782
1783 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1784 const struct hisi_sas_hw *hw)
1785 {
1786 struct resource *res;
1787 struct Scsi_Host *shost;
1788 struct hisi_hba *hisi_hba;
1789 struct device *dev = &pdev->dev;
1790
1791 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1792 if (!shost) {
1793 dev_err(dev, "scsi host alloc failed\n");
1794 return NULL;
1795 }
1796 hisi_hba = shost_priv(shost);
1797
1798 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1799 hisi_hba->hw = hw;
1800 hisi_hba->dev = dev;
1801 hisi_hba->platform_dev = pdev;
1802 hisi_hba->shost = shost;
1803 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1804
1805 init_timer(&hisi_hba->timer);
1806
1807 if (hisi_sas_get_fw_info(hisi_hba) < 0)
1808 goto err_out;
1809
1810 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1811 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1812 dev_err(dev, "No usable DMA addressing method\n");
1813 goto err_out;
1814 }
1815
1816 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1817 hisi_hba->regs = devm_ioremap_resource(dev, res);
1818 if (IS_ERR(hisi_hba->regs))
1819 goto err_out;
1820
1821 if (hisi_sas_alloc(hisi_hba, shost)) {
1822 hisi_sas_free(hisi_hba);
1823 goto err_out;
1824 }
1825
1826 return shost;
1827 err_out:
1828 kfree(shost);
1829 dev_err(dev, "shost alloc failed\n");
1830 return NULL;
1831 }
1832
1833 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1834 {
1835 int i;
1836
1837 for (i = 0; i < hisi_hba->n_phy; i++)
1838 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1839 hisi_hba->sas_addr,
1840 SAS_ADDR_SIZE);
1841 }
1842 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
1843
1844 int hisi_sas_probe(struct platform_device *pdev,
1845 const struct hisi_sas_hw *hw)
1846 {
1847 struct Scsi_Host *shost;
1848 struct hisi_hba *hisi_hba;
1849 struct device *dev = &pdev->dev;
1850 struct asd_sas_phy **arr_phy;
1851 struct asd_sas_port **arr_port;
1852 struct sas_ha_struct *sha;
1853 int rc, phy_nr, port_nr, i;
1854
1855 shost = hisi_sas_shost_alloc(pdev, hw);
1856 if (!shost)
1857 return -ENOMEM;
1858
1859 sha = SHOST_TO_SAS_HA(shost);
1860 hisi_hba = shost_priv(shost);
1861 platform_set_drvdata(pdev, sha);
1862
1863 phy_nr = port_nr = hisi_hba->n_phy;
1864
1865 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1866 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1867 if (!arr_phy || !arr_port) {
1868 rc = -ENOMEM;
1869 goto err_out_ha;
1870 }
1871
1872 sha->sas_phy = arr_phy;
1873 sha->sas_port = arr_port;
1874 sha->lldd_ha = hisi_hba;
1875
1876 shost->transportt = hisi_sas_stt;
1877 shost->max_id = HISI_SAS_MAX_DEVICES;
1878 shost->max_lun = ~0;
1879 shost->max_channel = 1;
1880 shost->max_cmd_len = 16;
1881 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1882 shost->can_queue = hisi_hba->hw->max_command_entries;
1883 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1884
1885 sha->sas_ha_name = DRV_NAME;
1886 sha->dev = hisi_hba->dev;
1887 sha->lldd_module = THIS_MODULE;
1888 sha->sas_addr = &hisi_hba->sas_addr[0];
1889 sha->num_phys = hisi_hba->n_phy;
1890 sha->core.shost = hisi_hba->shost;
1891
1892 for (i = 0; i < hisi_hba->n_phy; i++) {
1893 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1894 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1895 }
1896
1897 hisi_sas_init_add(hisi_hba);
1898
1899 rc = scsi_add_host(shost, &pdev->dev);
1900 if (rc)
1901 goto err_out_ha;
1902
1903 rc = sas_register_ha(sha);
1904 if (rc)
1905 goto err_out_register_ha;
1906
1907 rc = hisi_hba->hw->hw_init(hisi_hba);
1908 if (rc)
1909 goto err_out_register_ha;
1910
1911 scsi_scan_host(shost);
1912
1913 return 0;
1914
1915 err_out_register_ha:
1916 scsi_remove_host(shost);
1917 err_out_ha:
1918 hisi_sas_free(hisi_hba);
1919 kfree(shost);
1920 return rc;
1921 }
1922 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1923
1924 int hisi_sas_remove(struct platform_device *pdev)
1925 {
1926 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1927 struct hisi_hba *hisi_hba = sha->lldd_ha;
1928 struct Scsi_Host *shost = sha->core.shost;
1929
1930 sas_unregister_ha(sha);
1931 sas_remove_host(sha->core.shost);
1932
1933 hisi_sas_free(hisi_hba);
1934 kfree(shost);
1935 return 0;
1936 }
1937 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1938
1939 static __init int hisi_sas_init(void)
1940 {
1941 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1942
1943 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1944 if (!hisi_sas_stt)
1945 return -ENOMEM;
1946
1947 return 0;
1948 }
1949
1950 static __exit void hisi_sas_exit(void)
1951 {
1952 sas_release_transport(hisi_sas_stt);
1953 }
1954
1955 module_init(hisi_sas_init);
1956 module_exit(hisi_sas_exit);
1957
1958 MODULE_VERSION(DRV_VERSION);
1959 MODULE_LICENSE("GPL");
1960 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1961 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1962 MODULE_ALIAS("platform:" DRV_NAME);
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