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scsi: libsas: kill useless ha_event and do some cleanup
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
1 /*
2 * Copyright (c) 2015 Linaro Ltd.
3 * Copyright (c) 2015 Hisilicon Limited.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 */
11
12 #include "hisi_sas.h"
13 #define DRV_NAME "hisi_sas"
14
15 #define DEV_IS_GONE(dev) \
16 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
17
18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
19 u8 *lun, struct hisi_sas_tmf_task *tmf);
20 static int
21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
22 struct domain_device *device,
23 int abort_flag, int tag);
24 static int hisi_sas_softreset_ata_disk(struct domain_device *device);
25
26 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 case ATA_CMD_ZAC_MGMT_IN:
65 return HISI_SAS_SATA_PROTOCOL_DMA;
66
67 case ATA_CMD_CHK_POWER:
68 case ATA_CMD_DEV_RESET:
69 case ATA_CMD_EDD:
70 case ATA_CMD_FLUSH:
71 case ATA_CMD_FLUSH_EXT:
72 case ATA_CMD_VERIFY:
73 case ATA_CMD_VERIFY_EXT:
74 case ATA_CMD_SET_FEATURES:
75 case ATA_CMD_STANDBY:
76 case ATA_CMD_STANDBYNOW1:
77 case ATA_CMD_ZAC_MGMT_OUT:
78 return HISI_SAS_SATA_PROTOCOL_NONDATA;
79 default:
80 if (direction == DMA_NONE)
81 return HISI_SAS_SATA_PROTOCOL_NONDATA;
82 return HISI_SAS_SATA_PROTOCOL_PIO;
83 }
84 }
85 EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
86
87 void hisi_sas_sata_done(struct sas_task *task,
88 struct hisi_sas_slot *slot)
89 {
90 struct task_status_struct *ts = &task->task_status;
91 struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
92 struct hisi_sas_status_buffer *status_buf =
93 hisi_sas_status_buf_addr_mem(slot);
94 u8 *iu = &status_buf->iu[0];
95 struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
96
97 resp->frame_len = sizeof(struct dev_to_host_fis);
98 memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
99
100 ts->buf_valid_size = sizeof(*resp);
101 }
102 EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
103
104 int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
105 {
106 struct ata_queued_cmd *qc = task->uldd_task;
107
108 if (qc) {
109 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
110 qc->tf.command == ATA_CMD_FPDMA_READ) {
111 *tag = qc->tag;
112 return 1;
113 }
114 }
115 return 0;
116 }
117 EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
118
119 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
120 {
121 return device->port->ha->lldd_ha;
122 }
123
124 struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
125 {
126 return container_of(sas_port, struct hisi_sas_port, sas_port);
127 }
128 EXPORT_SYMBOL_GPL(to_hisi_sas_port);
129
130 void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
131 {
132 int phy_no;
133
134 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
135 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
136 }
137 EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
138
139 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
140 {
141 void *bitmap = hisi_hba->slot_index_tags;
142
143 clear_bit(slot_idx, bitmap);
144 }
145
146 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
147 {
148 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
149 }
150
151 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
152 {
153 void *bitmap = hisi_hba->slot_index_tags;
154
155 set_bit(slot_idx, bitmap);
156 }
157
158 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
159 {
160 unsigned int index;
161 void *bitmap = hisi_hba->slot_index_tags;
162
163 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
164 if (index >= hisi_hba->slot_index_count)
165 return -SAS_QUEUE_FULL;
166 hisi_sas_slot_index_set(hisi_hba, index);
167 *slot_idx = index;
168 return 0;
169 }
170
171 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
172 {
173 int i;
174
175 for (i = 0; i < hisi_hba->slot_index_count; ++i)
176 hisi_sas_slot_index_clear(hisi_hba, i);
177 }
178
179 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
180 struct hisi_sas_slot *slot)
181 {
182
183 if (task) {
184 struct device *dev = hisi_hba->dev;
185 struct domain_device *device = task->dev;
186 struct hisi_sas_device *sas_dev = device->lldd_dev;
187
188 if (!sas_protocol_ata(task->task_proto))
189 if (slot->n_elem)
190 dma_unmap_sg(dev, task->scatter, slot->n_elem,
191 task->data_dir);
192
193 task->lldd_task = NULL;
194
195 if (sas_dev)
196 atomic64_dec(&sas_dev->running_req);
197 }
198
199 if (slot->buf)
200 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
201
202
203 list_del_init(&slot->entry);
204 slot->task = NULL;
205 slot->port = NULL;
206 hisi_sas_slot_index_free(hisi_hba, slot->idx);
207
208 /* slot memory is fully zeroed when it is reused */
209 }
210 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
211
212 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
213 struct hisi_sas_slot *slot)
214 {
215 return hisi_hba->hw->prep_smp(hisi_hba, slot);
216 }
217
218 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
219 struct hisi_sas_slot *slot, int is_tmf,
220 struct hisi_sas_tmf_task *tmf)
221 {
222 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
223 }
224
225 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
226 struct hisi_sas_slot *slot)
227 {
228 return hisi_hba->hw->prep_stp(hisi_hba, slot);
229 }
230
231 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
232 struct hisi_sas_slot *slot,
233 int device_id, int abort_flag, int tag_to_abort)
234 {
235 return hisi_hba->hw->prep_abort(hisi_hba, slot,
236 device_id, abort_flag, tag_to_abort);
237 }
238
239 /*
240 * This function will issue an abort TMF regardless of whether the
241 * task is in the sdev or not. Then it will do the task complete
242 * cleanup and callbacks.
243 */
244 static void hisi_sas_slot_abort(struct work_struct *work)
245 {
246 struct hisi_sas_slot *abort_slot =
247 container_of(work, struct hisi_sas_slot, abort_slot);
248 struct sas_task *task = abort_slot->task;
249 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
250 struct scsi_cmnd *cmnd = task->uldd_task;
251 struct hisi_sas_tmf_task tmf_task;
252 struct scsi_lun lun;
253 struct device *dev = hisi_hba->dev;
254 int tag = abort_slot->idx;
255 unsigned long flags;
256
257 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
258 dev_err(dev, "cannot abort slot for non-ssp task\n");
259 goto out;
260 }
261
262 int_to_scsilun(cmnd->device->lun, &lun);
263 tmf_task.tmf = TMF_ABORT_TASK;
264 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
265
266 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
267 out:
268 /* Do cleanup for this task */
269 spin_lock_irqsave(&hisi_hba->lock, flags);
270 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
271 spin_unlock_irqrestore(&hisi_hba->lock, flags);
272 if (task->task_done)
273 task->task_done(task);
274 }
275
276 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
277 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
278 int *pass)
279 {
280 struct hisi_hba *hisi_hba = dq->hisi_hba;
281 struct domain_device *device = task->dev;
282 struct hisi_sas_device *sas_dev = device->lldd_dev;
283 struct hisi_sas_port *port;
284 struct hisi_sas_slot *slot;
285 struct hisi_sas_cmd_hdr *cmd_hdr_base;
286 struct asd_sas_port *sas_port = device->port;
287 struct device *dev = hisi_hba->dev;
288 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
289 unsigned long flags;
290
291 if (!sas_port) {
292 struct task_status_struct *ts = &task->task_status;
293
294 ts->resp = SAS_TASK_UNDELIVERED;
295 ts->stat = SAS_PHY_DOWN;
296 /*
297 * libsas will use dev->port, should
298 * not call task_done for sata
299 */
300 if (device->dev_type != SAS_SATA_DEV)
301 task->task_done(task);
302 return SAS_PHY_DOWN;
303 }
304
305 if (DEV_IS_GONE(sas_dev)) {
306 if (sas_dev)
307 dev_info(dev, "task prep: device %d not ready\n",
308 sas_dev->device_id);
309 else
310 dev_info(dev, "task prep: device %016llx not ready\n",
311 SAS_ADDR(device->sas_addr));
312
313 return SAS_PHY_DOWN;
314 }
315
316 port = to_hisi_sas_port(sas_port);
317 if (port && !port->port_attached) {
318 dev_info(dev, "task prep: %s port%d not attach device\n",
319 (dev_is_sata(device)) ?
320 "SATA/STP" : "SAS",
321 device->port->id);
322
323 return SAS_PHY_DOWN;
324 }
325
326 if (!sas_protocol_ata(task->task_proto)) {
327 if (task->num_scatter) {
328 n_elem = dma_map_sg(dev, task->scatter,
329 task->num_scatter, task->data_dir);
330 if (!n_elem) {
331 rc = -ENOMEM;
332 goto prep_out;
333 }
334 }
335 } else
336 n_elem = task->num_scatter;
337
338 spin_lock_irqsave(&hisi_hba->lock, flags);
339 if (hisi_hba->hw->slot_index_alloc)
340 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
341 device);
342 else
343 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
344 if (rc) {
345 spin_unlock_irqrestore(&hisi_hba->lock, flags);
346 goto err_out;
347 }
348 spin_unlock_irqrestore(&hisi_hba->lock, flags);
349
350 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
351 if (rc)
352 goto err_out_tag;
353
354 dlvry_queue = dq->id;
355 dlvry_queue_slot = dq->wr_point;
356 slot = &hisi_hba->slot_info[slot_idx];
357 memset(slot, 0, sizeof(struct hisi_sas_slot));
358
359 slot->idx = slot_idx;
360 slot->n_elem = n_elem;
361 slot->dlvry_queue = dlvry_queue;
362 slot->dlvry_queue_slot = dlvry_queue_slot;
363 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
364 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
365 slot->task = task;
366 slot->port = port;
367 task->lldd_task = slot;
368 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
369
370 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
371 GFP_ATOMIC, &slot->buf_dma);
372 if (!slot->buf) {
373 rc = -ENOMEM;
374 goto err_out_slot_buf;
375 }
376 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
377 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
378 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
379
380 switch (task->task_proto) {
381 case SAS_PROTOCOL_SMP:
382 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
383 break;
384 case SAS_PROTOCOL_SSP:
385 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
386 break;
387 case SAS_PROTOCOL_SATA:
388 case SAS_PROTOCOL_STP:
389 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
390 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
391 break;
392 default:
393 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
394 task->task_proto);
395 rc = -EINVAL;
396 break;
397 }
398
399 if (rc) {
400 dev_err(dev, "task prep: rc = 0x%x\n", rc);
401 goto err_out_buf;
402 }
403
404 list_add_tail(&slot->entry, &sas_dev->list);
405 spin_lock_irqsave(&task->task_state_lock, flags);
406 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
407 spin_unlock_irqrestore(&task->task_state_lock, flags);
408
409 dq->slot_prep = slot;
410
411 atomic64_inc(&sas_dev->running_req);
412 ++(*pass);
413
414 return 0;
415
416 err_out_buf:
417 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
418 slot->buf_dma);
419 err_out_slot_buf:
420 /* Nothing to be done */
421 err_out_tag:
422 spin_lock_irqsave(&hisi_hba->lock, flags);
423 hisi_sas_slot_index_free(hisi_hba, slot_idx);
424 spin_unlock_irqrestore(&hisi_hba->lock, flags);
425 err_out:
426 dev_err(dev, "task prep: failed[%d]!\n", rc);
427 if (!sas_protocol_ata(task->task_proto))
428 if (n_elem)
429 dma_unmap_sg(dev, task->scatter, n_elem,
430 task->data_dir);
431 prep_out:
432 return rc;
433 }
434
435 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
436 int is_tmf, struct hisi_sas_tmf_task *tmf)
437 {
438 u32 rc;
439 u32 pass = 0;
440 unsigned long flags;
441 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
442 struct device *dev = hisi_hba->dev;
443 struct domain_device *device = task->dev;
444 struct hisi_sas_device *sas_dev = device->lldd_dev;
445 struct hisi_sas_dq *dq = sas_dev->dq;
446
447 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
448 return -EINVAL;
449
450 /* protect task_prep and start_delivery sequence */
451 spin_lock_irqsave(&dq->lock, flags);
452 rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
453 if (rc)
454 dev_err(dev, "task exec: failed[%d]!\n", rc);
455
456 if (likely(pass))
457 hisi_hba->hw->start_delivery(dq);
458 spin_unlock_irqrestore(&dq->lock, flags);
459
460 return rc;
461 }
462
463 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
464 {
465 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
466 struct asd_sas_phy *sas_phy = &phy->sas_phy;
467 struct sas_ha_struct *sas_ha;
468
469 if (!phy->phy_attached)
470 return;
471
472 sas_ha = &hisi_hba->sha;
473 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
474
475 if (sas_phy->phy) {
476 struct sas_phy *sphy = sas_phy->phy;
477
478 sphy->negotiated_linkrate = sas_phy->linkrate;
479 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
480 sphy->maximum_linkrate_hw =
481 hisi_hba->hw->phy_get_max_linkrate();
482 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
483 sphy->minimum_linkrate = phy->minimum_linkrate;
484
485 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
486 sphy->maximum_linkrate = phy->maximum_linkrate;
487 }
488
489 if (phy->phy_type & PORT_TYPE_SAS) {
490 struct sas_identify_frame *id;
491
492 id = (struct sas_identify_frame *)phy->frame_rcvd;
493 id->dev_type = phy->identify.device_type;
494 id->initiator_bits = SAS_PROTOCOL_ALL;
495 id->target_bits = phy->identify.target_port_protocols;
496 } else if (phy->phy_type & PORT_TYPE_SATA) {
497 /*Nothing*/
498 }
499
500 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
501 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
502 }
503
504 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
505 {
506 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
507 struct hisi_sas_device *sas_dev = NULL;
508 int i;
509
510 spin_lock(&hisi_hba->lock);
511 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
512 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
513 int queue = i % hisi_hba->queue_count;
514 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
515
516 hisi_hba->devices[i].device_id = i;
517 sas_dev = &hisi_hba->devices[i];
518 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
519 sas_dev->dev_type = device->dev_type;
520 sas_dev->hisi_hba = hisi_hba;
521 sas_dev->sas_device = device;
522 sas_dev->dq = dq;
523 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
524 break;
525 }
526 }
527 spin_unlock(&hisi_hba->lock);
528
529 return sas_dev;
530 }
531
532 static int hisi_sas_dev_found(struct domain_device *device)
533 {
534 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
535 struct domain_device *parent_dev = device->parent;
536 struct hisi_sas_device *sas_dev;
537 struct device *dev = hisi_hba->dev;
538
539 if (hisi_hba->hw->alloc_dev)
540 sas_dev = hisi_hba->hw->alloc_dev(device);
541 else
542 sas_dev = hisi_sas_alloc_dev(device);
543 if (!sas_dev) {
544 dev_err(dev, "fail alloc dev: max support %d devices\n",
545 HISI_SAS_MAX_DEVICES);
546 return -EINVAL;
547 }
548
549 device->lldd_dev = sas_dev;
550 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
551
552 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
553 int phy_no;
554 u8 phy_num = parent_dev->ex_dev.num_phys;
555 struct ex_phy *phy;
556
557 for (phy_no = 0; phy_no < phy_num; phy_no++) {
558 phy = &parent_dev->ex_dev.ex_phy[phy_no];
559 if (SAS_ADDR(phy->attached_sas_addr) ==
560 SAS_ADDR(device->sas_addr)) {
561 sas_dev->attached_phy = phy_no;
562 break;
563 }
564 }
565
566 if (phy_no == phy_num) {
567 dev_info(dev, "dev found: no attached "
568 "dev:%016llx at ex:%016llx\n",
569 SAS_ADDR(device->sas_addr),
570 SAS_ADDR(parent_dev->sas_addr));
571 return -EINVAL;
572 }
573 }
574
575 return 0;
576 }
577
578 static int hisi_sas_slave_configure(struct scsi_device *sdev)
579 {
580 struct domain_device *dev = sdev_to_domain_dev(sdev);
581 int ret = sas_slave_configure(sdev);
582
583 if (ret)
584 return ret;
585 if (!dev_is_sata(dev))
586 sas_change_queue_depth(sdev, 64);
587
588 return 0;
589 }
590
591 static void hisi_sas_scan_start(struct Scsi_Host *shost)
592 {
593 struct hisi_hba *hisi_hba = shost_priv(shost);
594
595 hisi_hba->hw->phys_init(hisi_hba);
596 }
597
598 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
599 {
600 struct hisi_hba *hisi_hba = shost_priv(shost);
601 struct sas_ha_struct *sha = &hisi_hba->sha;
602
603 /* Wait for PHY up interrupt to occur */
604 if (time < HZ)
605 return 0;
606
607 sas_drain_work(sha);
608 return 1;
609 }
610
611 static void hisi_sas_phyup_work(struct work_struct *work)
612 {
613 struct hisi_sas_phy *phy =
614 container_of(work, struct hisi_sas_phy, phyup_ws);
615 struct hisi_hba *hisi_hba = phy->hisi_hba;
616 struct asd_sas_phy *sas_phy = &phy->sas_phy;
617 int phy_no = sas_phy->id;
618
619 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
620 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
621 }
622
623 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
624 {
625 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
626 struct asd_sas_phy *sas_phy = &phy->sas_phy;
627
628 phy->hisi_hba = hisi_hba;
629 phy->port = NULL;
630 init_timer(&phy->timer);
631 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
632 sas_phy->class = SAS;
633 sas_phy->iproto = SAS_PROTOCOL_ALL;
634 sas_phy->tproto = 0;
635 sas_phy->type = PHY_TYPE_PHYSICAL;
636 sas_phy->role = PHY_ROLE_INITIATOR;
637 sas_phy->oob_mode = OOB_NOT_CONNECTED;
638 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
639 sas_phy->id = phy_no;
640 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
641 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
642 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
643 sas_phy->lldd_phy = phy;
644
645 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
646 }
647
648 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
649 {
650 struct sas_ha_struct *sas_ha = sas_phy->ha;
651 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
652 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
653 struct asd_sas_port *sas_port = sas_phy->port;
654 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
655 unsigned long flags;
656
657 if (!sas_port)
658 return;
659
660 spin_lock_irqsave(&hisi_hba->lock, flags);
661 port->port_attached = 1;
662 port->id = phy->port_id;
663 phy->port = port;
664 sas_port->lldd_port = port;
665 spin_unlock_irqrestore(&hisi_hba->lock, flags);
666 }
667
668 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
669 struct hisi_sas_slot *slot)
670 {
671 if (task) {
672 unsigned long flags;
673 struct task_status_struct *ts;
674
675 ts = &task->task_status;
676
677 ts->resp = SAS_TASK_COMPLETE;
678 ts->stat = SAS_ABORTED_TASK;
679 spin_lock_irqsave(&task->task_state_lock, flags);
680 task->task_state_flags &=
681 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
682 task->task_state_flags |= SAS_TASK_STATE_DONE;
683 spin_unlock_irqrestore(&task->task_state_lock, flags);
684 }
685
686 hisi_sas_slot_task_free(hisi_hba, task, slot);
687 }
688
689 /* hisi_hba.lock should be locked */
690 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
691 struct domain_device *device)
692 {
693 struct hisi_sas_slot *slot, *slot2;
694 struct hisi_sas_device *sas_dev = device->lldd_dev;
695
696 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
697 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
698 }
699
700 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
701 {
702 struct hisi_sas_device *sas_dev;
703 struct domain_device *device;
704 int i;
705
706 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
707 sas_dev = &hisi_hba->devices[i];
708 device = sas_dev->sas_device;
709
710 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
711 !device)
712 continue;
713
714 hisi_sas_release_task(hisi_hba, device);
715 }
716 }
717
718 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
719 struct domain_device *device)
720 {
721 if (hisi_hba->hw->dereg_device)
722 hisi_hba->hw->dereg_device(hisi_hba, device);
723 }
724
725 static void hisi_sas_dev_gone(struct domain_device *device)
726 {
727 struct hisi_sas_device *sas_dev = device->lldd_dev;
728 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
729 struct device *dev = hisi_hba->dev;
730
731 dev_info(dev, "found dev[%d:%x] is gone\n",
732 sas_dev->device_id, sas_dev->dev_type);
733
734 hisi_sas_internal_task_abort(hisi_hba, device,
735 HISI_SAS_INT_ABT_DEV, 0);
736
737 hisi_sas_dereg_device(hisi_hba, device);
738
739 hisi_hba->hw->free_device(hisi_hba, sas_dev);
740 device->lldd_dev = NULL;
741 memset(sas_dev, 0, sizeof(*sas_dev));
742 sas_dev->dev_type = SAS_PHY_UNUSED;
743 }
744
745 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
746 {
747 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
748 }
749
750 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
751 void *funcdata)
752 {
753 struct sas_ha_struct *sas_ha = sas_phy->ha;
754 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
755 int phy_no = sas_phy->id;
756
757 switch (func) {
758 case PHY_FUNC_HARD_RESET:
759 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
760 break;
761
762 case PHY_FUNC_LINK_RESET:
763 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
764 msleep(100);
765 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
766 break;
767
768 case PHY_FUNC_DISABLE:
769 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
770 break;
771
772 case PHY_FUNC_SET_LINK_RATE:
773 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
774 break;
775 case PHY_FUNC_GET_EVENTS:
776 if (hisi_hba->hw->get_events) {
777 hisi_hba->hw->get_events(hisi_hba, phy_no);
778 break;
779 }
780 /* fallthru */
781 case PHY_FUNC_RELEASE_SPINUP_HOLD:
782 default:
783 return -EOPNOTSUPP;
784 }
785 return 0;
786 }
787
788 static void hisi_sas_task_done(struct sas_task *task)
789 {
790 if (!del_timer(&task->slow_task->timer))
791 return;
792 complete(&task->slow_task->completion);
793 }
794
795 static void hisi_sas_tmf_timedout(unsigned long data)
796 {
797 struct sas_task *task = (struct sas_task *)data;
798 unsigned long flags;
799
800 spin_lock_irqsave(&task->task_state_lock, flags);
801 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
802 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
803 spin_unlock_irqrestore(&task->task_state_lock, flags);
804
805 complete(&task->slow_task->completion);
806 }
807
808 #define TASK_TIMEOUT 20
809 #define TASK_RETRY 3
810 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
811 void *parameter, u32 para_len,
812 struct hisi_sas_tmf_task *tmf)
813 {
814 struct hisi_sas_device *sas_dev = device->lldd_dev;
815 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
816 struct device *dev = hisi_hba->dev;
817 struct sas_task *task;
818 int res, retry;
819
820 for (retry = 0; retry < TASK_RETRY; retry++) {
821 task = sas_alloc_slow_task(GFP_KERNEL);
822 if (!task)
823 return -ENOMEM;
824
825 task->dev = device;
826 task->task_proto = device->tproto;
827
828 if (dev_is_sata(device)) {
829 task->ata_task.device_control_reg_update = 1;
830 memcpy(&task->ata_task.fis, parameter, para_len);
831 } else {
832 memcpy(&task->ssp_task, parameter, para_len);
833 }
834 task->task_done = hisi_sas_task_done;
835
836 task->slow_task->timer.data = (unsigned long) task;
837 task->slow_task->timer.function = hisi_sas_tmf_timedout;
838 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
839 add_timer(&task->slow_task->timer);
840
841 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
842
843 if (res) {
844 del_timer(&task->slow_task->timer);
845 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
846 res);
847 goto ex_err;
848 }
849
850 wait_for_completion(&task->slow_task->completion);
851 res = TMF_RESP_FUNC_FAILED;
852 /* Even TMF timed out, return direct. */
853 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
854 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
855 struct hisi_sas_slot *slot = task->lldd_task;
856
857 dev_err(dev, "abort tmf: TMF task timeout\n");
858 if (slot)
859 slot->task = NULL;
860
861 goto ex_err;
862 }
863 }
864
865 if (task->task_status.resp == SAS_TASK_COMPLETE &&
866 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
867 res = TMF_RESP_FUNC_COMPLETE;
868 break;
869 }
870
871 if (task->task_status.resp == SAS_TASK_COMPLETE &&
872 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
873 res = TMF_RESP_FUNC_SUCC;
874 break;
875 }
876
877 if (task->task_status.resp == SAS_TASK_COMPLETE &&
878 task->task_status.stat == SAS_DATA_UNDERRUN) {
879 /* no error, but return the number of bytes of
880 * underrun
881 */
882 dev_warn(dev, "abort tmf: task to dev %016llx "
883 "resp: 0x%x sts 0x%x underrun\n",
884 SAS_ADDR(device->sas_addr),
885 task->task_status.resp,
886 task->task_status.stat);
887 res = task->task_status.residual;
888 break;
889 }
890
891 if (task->task_status.resp == SAS_TASK_COMPLETE &&
892 task->task_status.stat == SAS_DATA_OVERRUN) {
893 dev_warn(dev, "abort tmf: blocked task error\n");
894 res = -EMSGSIZE;
895 break;
896 }
897
898 dev_warn(dev, "abort tmf: task to dev "
899 "%016llx resp: 0x%x status 0x%x\n",
900 SAS_ADDR(device->sas_addr), task->task_status.resp,
901 task->task_status.stat);
902 sas_free_task(task);
903 task = NULL;
904 }
905 ex_err:
906 if (retry == TASK_RETRY)
907 dev_warn(dev, "abort tmf: executing internal task failed!\n");
908 sas_free_task(task);
909 return res;
910 }
911
912 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
913 bool reset, int pmp, u8 *fis)
914 {
915 struct ata_taskfile tf;
916
917 ata_tf_init(dev, &tf);
918 if (reset)
919 tf.ctl |= ATA_SRST;
920 else
921 tf.ctl &= ~ATA_SRST;
922 tf.command = ATA_CMD_DEV_RESET;
923 ata_tf_to_fis(&tf, pmp, 0, fis);
924 }
925
926 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
927 {
928 u8 fis[20] = {0};
929 struct ata_port *ap = device->sata_dev.ap;
930 struct ata_link *link;
931 int rc = TMF_RESP_FUNC_FAILED;
932 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
933 struct device *dev = hisi_hba->dev;
934 int s = sizeof(struct host_to_dev_fis);
935 unsigned long flags;
936
937 ata_for_each_link(link, ap, EDGE) {
938 int pmp = sata_srst_pmp(link);
939
940 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
941 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
942 if (rc != TMF_RESP_FUNC_COMPLETE)
943 break;
944 }
945
946 if (rc == TMF_RESP_FUNC_COMPLETE) {
947 ata_for_each_link(link, ap, EDGE) {
948 int pmp = sata_srst_pmp(link);
949
950 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
951 rc = hisi_sas_exec_internal_tmf_task(device, fis,
952 s, NULL);
953 if (rc != TMF_RESP_FUNC_COMPLETE)
954 dev_err(dev, "ata disk de-reset failed\n");
955 }
956 } else {
957 dev_err(dev, "ata disk reset failed\n");
958 }
959
960 if (rc == TMF_RESP_FUNC_COMPLETE) {
961 spin_lock_irqsave(&hisi_hba->lock, flags);
962 hisi_sas_release_task(hisi_hba, device);
963 spin_unlock_irqrestore(&hisi_hba->lock, flags);
964 }
965
966 return rc;
967 }
968
969 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
970 u8 *lun, struct hisi_sas_tmf_task *tmf)
971 {
972 struct sas_ssp_task ssp_task;
973
974 if (!(device->tproto & SAS_PROTOCOL_SSP))
975 return TMF_RESP_FUNC_ESUPP;
976
977 memcpy(ssp_task.LUN, lun, 8);
978
979 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
980 sizeof(ssp_task), tmf);
981 }
982
983 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba,
984 struct asd_sas_port *sas_port, enum sas_linkrate linkrate)
985 {
986 struct hisi_sas_device *sas_dev;
987 struct domain_device *device;
988 int i;
989
990 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
991 sas_dev = &hisi_hba->devices[i];
992 device = sas_dev->sas_device;
993 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
994 || !device || (device->port != sas_port))
995 continue;
996
997 hisi_hba->hw->free_device(hisi_hba, sas_dev);
998
999 /* Update linkrate of directly attached device. */
1000 if (!device->parent)
1001 device->linkrate = linkrate;
1002
1003 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1004 }
1005 }
1006
1007 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1008 u32 state)
1009 {
1010 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1011 struct asd_sas_port *_sas_port = NULL;
1012 int phy_no;
1013
1014 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1015 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1016 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1017 struct asd_sas_port *sas_port = sas_phy->port;
1018 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
1019 bool do_port_check = !!(_sas_port != sas_port);
1020
1021 if (!sas_phy->phy->enabled)
1022 continue;
1023
1024 /* Report PHY state change to libsas */
1025 if (state & (1 << phy_no)) {
1026 if (do_port_check && sas_port) {
1027 struct domain_device *dev = sas_port->port_dev;
1028
1029 _sas_port = sas_port;
1030 port->id = phy->port_id;
1031 hisi_sas_refresh_port_id(hisi_hba,
1032 sas_port, sas_phy->linkrate);
1033
1034 if (DEV_IS_EXPANDER(dev->dev_type))
1035 sas_ha->notify_port_event(sas_phy,
1036 PORTE_BROADCAST_RCVD);
1037 }
1038 } else if (old_state & (1 << phy_no))
1039 /* PHY down but was up before */
1040 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1041
1042 }
1043
1044 drain_workqueue(hisi_hba->shost->work_q);
1045 }
1046
1047 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1048 {
1049 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1050 struct device *dev = hisi_hba->dev;
1051 struct Scsi_Host *shost = hisi_hba->shost;
1052 u32 old_state, state;
1053 unsigned long flags;
1054 int rc;
1055
1056 if (!hisi_hba->hw->soft_reset)
1057 return -1;
1058
1059 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1060 return -1;
1061
1062 dev_dbg(dev, "controller resetting...\n");
1063 old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1064
1065 scsi_block_requests(shost);
1066 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1067 rc = hisi_hba->hw->soft_reset(hisi_hba);
1068 if (rc) {
1069 dev_warn(dev, "controller reset failed (%d)\n", rc);
1070 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1071 goto out;
1072 }
1073 spin_lock_irqsave(&hisi_hba->lock, flags);
1074 hisi_sas_release_tasks(hisi_hba);
1075 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1076
1077 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1078
1079 /* Init and wait for PHYs to come up and all libsas event finished. */
1080 hisi_hba->hw->phys_init(hisi_hba);
1081 msleep(1000);
1082 drain_workqueue(hisi_hba->wq);
1083 drain_workqueue(shost->work_q);
1084
1085 state = hisi_hba->hw->get_phys_state(hisi_hba);
1086 hisi_sas_rescan_topology(hisi_hba, old_state, state);
1087 dev_dbg(dev, "controller reset complete\n");
1088
1089 out:
1090 scsi_unblock_requests(shost);
1091 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1092
1093 return rc;
1094 }
1095
1096 static int hisi_sas_abort_task(struct sas_task *task)
1097 {
1098 struct scsi_lun lun;
1099 struct hisi_sas_tmf_task tmf_task;
1100 struct domain_device *device = task->dev;
1101 struct hisi_sas_device *sas_dev = device->lldd_dev;
1102 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1103 struct device *dev = hisi_hba->dev;
1104 int rc = TMF_RESP_FUNC_FAILED;
1105 unsigned long flags;
1106
1107 if (!sas_dev) {
1108 dev_warn(dev, "Device has been removed\n");
1109 return TMF_RESP_FUNC_FAILED;
1110 }
1111
1112 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1113 rc = TMF_RESP_FUNC_COMPLETE;
1114 goto out;
1115 }
1116
1117 sas_dev->dev_status = HISI_SAS_DEV_EH;
1118 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1119 struct scsi_cmnd *cmnd = task->uldd_task;
1120 struct hisi_sas_slot *slot = task->lldd_task;
1121 u32 tag = slot->idx;
1122 int rc2;
1123
1124 int_to_scsilun(cmnd->device->lun, &lun);
1125 tmf_task.tmf = TMF_ABORT_TASK;
1126 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1127
1128 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1129 &tmf_task);
1130
1131 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1132 HISI_SAS_INT_ABT_CMD, tag);
1133 /*
1134 * If the TMF finds that the IO is not in the device and also
1135 * the internal abort does not succeed, then it is safe to
1136 * free the slot.
1137 * Note: if the internal abort succeeds then the slot
1138 * will have already been completed
1139 */
1140 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1141 if (task->lldd_task) {
1142 spin_lock_irqsave(&hisi_hba->lock, flags);
1143 hisi_sas_do_release_task(hisi_hba, task, slot);
1144 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1145 }
1146 }
1147 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1148 task->task_proto & SAS_PROTOCOL_STP) {
1149 if (task->dev->dev_type == SAS_SATA_DEV) {
1150 hisi_sas_internal_task_abort(hisi_hba, device,
1151 HISI_SAS_INT_ABT_DEV, 0);
1152 hisi_sas_dereg_device(hisi_hba, device);
1153 rc = hisi_sas_softreset_ata_disk(device);
1154 }
1155 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1156 /* SMP */
1157 struct hisi_sas_slot *slot = task->lldd_task;
1158 u32 tag = slot->idx;
1159
1160 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1161 HISI_SAS_INT_ABT_CMD, tag);
1162 if (rc == TMF_RESP_FUNC_FAILED) {
1163 spin_lock_irqsave(&hisi_hba->lock, flags);
1164 hisi_sas_do_release_task(hisi_hba, task, slot);
1165 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1166 }
1167 }
1168
1169 out:
1170 if (rc != TMF_RESP_FUNC_COMPLETE)
1171 dev_notice(dev, "abort task: rc=%d\n", rc);
1172 return rc;
1173 }
1174
1175 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1176 {
1177 struct hisi_sas_tmf_task tmf_task;
1178 int rc = TMF_RESP_FUNC_FAILED;
1179
1180 tmf_task.tmf = TMF_ABORT_TASK_SET;
1181 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1182
1183 return rc;
1184 }
1185
1186 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1187 {
1188 int rc = TMF_RESP_FUNC_FAILED;
1189 struct hisi_sas_tmf_task tmf_task;
1190
1191 tmf_task.tmf = TMF_CLEAR_ACA;
1192 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1193
1194 return rc;
1195 }
1196
1197 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1198 {
1199 struct sas_phy *phy = sas_get_local_phy(device);
1200 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1201 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1202 rc = sas_phy_reset(phy, reset_type);
1203 sas_put_local_phy(phy);
1204 msleep(2000);
1205 return rc;
1206 }
1207
1208 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1209 {
1210 struct hisi_sas_device *sas_dev = device->lldd_dev;
1211 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1212 unsigned long flags;
1213 int rc = TMF_RESP_FUNC_FAILED;
1214
1215 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1216 return TMF_RESP_FUNC_FAILED;
1217 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1218
1219 hisi_sas_internal_task_abort(hisi_hba, device,
1220 HISI_SAS_INT_ABT_DEV, 0);
1221 hisi_sas_dereg_device(hisi_hba, device);
1222
1223 rc = hisi_sas_debug_I_T_nexus_reset(device);
1224
1225 if (rc == TMF_RESP_FUNC_COMPLETE) {
1226 spin_lock_irqsave(&hisi_hba->lock, flags);
1227 hisi_sas_release_task(hisi_hba, device);
1228 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1229 }
1230 return rc;
1231 }
1232
1233 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1234 {
1235 struct hisi_sas_device *sas_dev = device->lldd_dev;
1236 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1237 struct device *dev = hisi_hba->dev;
1238 unsigned long flags;
1239 int rc = TMF_RESP_FUNC_FAILED;
1240
1241 sas_dev->dev_status = HISI_SAS_DEV_EH;
1242 if (dev_is_sata(device)) {
1243 struct sas_phy *phy;
1244
1245 /* Clear internal IO and then hardreset */
1246 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1247 HISI_SAS_INT_ABT_DEV, 0);
1248 if (rc == TMF_RESP_FUNC_FAILED)
1249 goto out;
1250 hisi_sas_dereg_device(hisi_hba, device);
1251
1252 phy = sas_get_local_phy(device);
1253
1254 rc = sas_phy_reset(phy, 1);
1255
1256 if (rc == 0) {
1257 spin_lock_irqsave(&hisi_hba->lock, flags);
1258 hisi_sas_release_task(hisi_hba, device);
1259 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1260 }
1261 sas_put_local_phy(phy);
1262 } else {
1263 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1264
1265 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1266 if (rc == TMF_RESP_FUNC_COMPLETE) {
1267 spin_lock_irqsave(&hisi_hba->lock, flags);
1268 hisi_sas_release_task(hisi_hba, device);
1269 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1270 }
1271 }
1272 out:
1273 if (rc != TMF_RESP_FUNC_COMPLETE)
1274 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1275 sas_dev->device_id, rc);
1276 return rc;
1277 }
1278
1279 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1280 {
1281 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1282
1283 return hisi_sas_controller_reset(hisi_hba);
1284 }
1285
1286 static int hisi_sas_query_task(struct sas_task *task)
1287 {
1288 struct scsi_lun lun;
1289 struct hisi_sas_tmf_task tmf_task;
1290 int rc = TMF_RESP_FUNC_FAILED;
1291
1292 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1293 struct scsi_cmnd *cmnd = task->uldd_task;
1294 struct domain_device *device = task->dev;
1295 struct hisi_sas_slot *slot = task->lldd_task;
1296 u32 tag = slot->idx;
1297
1298 int_to_scsilun(cmnd->device->lun, &lun);
1299 tmf_task.tmf = TMF_QUERY_TASK;
1300 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1301
1302 rc = hisi_sas_debug_issue_ssp_tmf(device,
1303 lun.scsi_lun,
1304 &tmf_task);
1305 switch (rc) {
1306 /* The task is still in Lun, release it then */
1307 case TMF_RESP_FUNC_SUCC:
1308 /* The task is not in Lun or failed, reset the phy */
1309 case TMF_RESP_FUNC_FAILED:
1310 case TMF_RESP_FUNC_COMPLETE:
1311 break;
1312 default:
1313 rc = TMF_RESP_FUNC_FAILED;
1314 break;
1315 }
1316 }
1317 return rc;
1318 }
1319
1320 static int
1321 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1322 struct sas_task *task, int abort_flag,
1323 int task_tag)
1324 {
1325 struct domain_device *device = task->dev;
1326 struct hisi_sas_device *sas_dev = device->lldd_dev;
1327 struct device *dev = hisi_hba->dev;
1328 struct hisi_sas_port *port;
1329 struct hisi_sas_slot *slot;
1330 struct asd_sas_port *sas_port = device->port;
1331 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1332 struct hisi_sas_dq *dq = sas_dev->dq;
1333 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1334 unsigned long flags, flags_dq;
1335
1336 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1337 return -EINVAL;
1338
1339 if (!device->port)
1340 return -1;
1341
1342 port = to_hisi_sas_port(sas_port);
1343
1344 /* simply get a slot and send abort command */
1345 spin_lock_irqsave(&hisi_hba->lock, flags);
1346 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1347 if (rc) {
1348 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1349 goto err_out;
1350 }
1351 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1352
1353 spin_lock_irqsave(&dq->lock, flags_dq);
1354 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1355 if (rc)
1356 goto err_out_tag;
1357
1358 dlvry_queue = dq->id;
1359 dlvry_queue_slot = dq->wr_point;
1360
1361 slot = &hisi_hba->slot_info[slot_idx];
1362 memset(slot, 0, sizeof(struct hisi_sas_slot));
1363
1364 slot->idx = slot_idx;
1365 slot->n_elem = n_elem;
1366 slot->dlvry_queue = dlvry_queue;
1367 slot->dlvry_queue_slot = dlvry_queue_slot;
1368 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1369 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1370 slot->task = task;
1371 slot->port = port;
1372 task->lldd_task = slot;
1373
1374 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
1375 GFP_ATOMIC, &slot->buf_dma);
1376 if (!slot->buf) {
1377 rc = -ENOMEM;
1378 goto err_out_tag;
1379 }
1380
1381 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1382 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1383 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1384
1385 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1386 abort_flag, task_tag);
1387 if (rc)
1388 goto err_out_buf;
1389
1390
1391 list_add_tail(&slot->entry, &sas_dev->list);
1392 spin_lock_irqsave(&task->task_state_lock, flags);
1393 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1394 spin_unlock_irqrestore(&task->task_state_lock, flags);
1395
1396 dq->slot_prep = slot;
1397
1398 atomic64_inc(&sas_dev->running_req);
1399
1400 /* send abort command to the chip */
1401 hisi_hba->hw->start_delivery(dq);
1402 spin_unlock_irqrestore(&dq->lock, flags_dq);
1403
1404 return 0;
1405
1406 err_out_buf:
1407 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1408 slot->buf_dma);
1409 err_out_tag:
1410 spin_lock_irqsave(&hisi_hba->lock, flags);
1411 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1412 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1413 spin_unlock_irqrestore(&dq->lock, flags_dq);
1414 err_out:
1415 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1416
1417 return rc;
1418 }
1419
1420 /**
1421 * hisi_sas_internal_task_abort -- execute an internal
1422 * abort command for single IO command or a device
1423 * @hisi_hba: host controller struct
1424 * @device: domain device
1425 * @abort_flag: mode of operation, device or single IO
1426 * @tag: tag of IO to be aborted (only relevant to single
1427 * IO mode)
1428 */
1429 static int
1430 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1431 struct domain_device *device,
1432 int abort_flag, int tag)
1433 {
1434 struct sas_task *task;
1435 struct hisi_sas_device *sas_dev = device->lldd_dev;
1436 struct device *dev = hisi_hba->dev;
1437 int res;
1438
1439 if (!hisi_hba->hw->prep_abort)
1440 return -EOPNOTSUPP;
1441
1442 task = sas_alloc_slow_task(GFP_KERNEL);
1443 if (!task)
1444 return -ENOMEM;
1445
1446 task->dev = device;
1447 task->task_proto = device->tproto;
1448 task->task_done = hisi_sas_task_done;
1449 task->slow_task->timer.data = (unsigned long)task;
1450 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1451 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1452 add_timer(&task->slow_task->timer);
1453
1454 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1455 task, abort_flag, tag);
1456 if (res) {
1457 del_timer(&task->slow_task->timer);
1458 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1459 res);
1460 goto exit;
1461 }
1462 wait_for_completion(&task->slow_task->completion);
1463 res = TMF_RESP_FUNC_FAILED;
1464
1465 /* Internal abort timed out */
1466 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1467 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1468 struct hisi_sas_slot *slot = task->lldd_task;
1469
1470 if (slot)
1471 slot->task = NULL;
1472 dev_err(dev, "internal task abort: timeout.\n");
1473 }
1474 }
1475
1476 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1477 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1478 res = TMF_RESP_FUNC_COMPLETE;
1479 goto exit;
1480 }
1481
1482 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1483 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1484 res = TMF_RESP_FUNC_SUCC;
1485 goto exit;
1486 }
1487
1488 exit:
1489 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1490 "resp: 0x%x sts 0x%x\n",
1491 SAS_ADDR(device->sas_addr),
1492 task,
1493 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1494 task->task_status.stat);
1495 sas_free_task(task);
1496
1497 return res;
1498 }
1499
1500 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1501 {
1502 hisi_sas_port_notify_formed(sas_phy);
1503 }
1504
1505 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1506 {
1507 phy->phy_attached = 0;
1508 phy->phy_type = 0;
1509 phy->port = NULL;
1510 }
1511
1512 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1513 {
1514 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1515 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1516 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1517
1518 if (rdy) {
1519 /* Phy down but ready */
1520 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1521 hisi_sas_port_notify_formed(sas_phy);
1522 } else {
1523 struct hisi_sas_port *port = phy->port;
1524
1525 /* Phy down and not ready */
1526 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1527 sas_phy_disconnected(sas_phy);
1528
1529 if (port) {
1530 if (phy->phy_type & PORT_TYPE_SAS) {
1531 int port_id = port->id;
1532
1533 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1534 port_id))
1535 port->port_attached = 0;
1536 } else if (phy->phy_type & PORT_TYPE_SATA)
1537 port->port_attached = 0;
1538 }
1539 hisi_sas_phy_disconnected(phy);
1540 }
1541 }
1542 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1543
1544
1545 struct scsi_transport_template *hisi_sas_stt;
1546 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1547
1548 static struct scsi_host_template _hisi_sas_sht = {
1549 .module = THIS_MODULE,
1550 .name = DRV_NAME,
1551 .queuecommand = sas_queuecommand,
1552 .target_alloc = sas_target_alloc,
1553 .slave_configure = hisi_sas_slave_configure,
1554 .scan_finished = hisi_sas_scan_finished,
1555 .scan_start = hisi_sas_scan_start,
1556 .change_queue_depth = sas_change_queue_depth,
1557 .bios_param = sas_bios_param,
1558 .can_queue = 1,
1559 .this_id = -1,
1560 .sg_tablesize = SG_ALL,
1561 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1562 .use_clustering = ENABLE_CLUSTERING,
1563 .eh_device_reset_handler = sas_eh_device_reset_handler,
1564 .eh_target_reset_handler = sas_eh_target_reset_handler,
1565 .target_destroy = sas_target_destroy,
1566 .ioctl = sas_ioctl,
1567 };
1568 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1569 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1570
1571 static struct sas_domain_function_template hisi_sas_transport_ops = {
1572 .lldd_dev_found = hisi_sas_dev_found,
1573 .lldd_dev_gone = hisi_sas_dev_gone,
1574 .lldd_execute_task = hisi_sas_queue_command,
1575 .lldd_control_phy = hisi_sas_control_phy,
1576 .lldd_abort_task = hisi_sas_abort_task,
1577 .lldd_abort_task_set = hisi_sas_abort_task_set,
1578 .lldd_clear_aca = hisi_sas_clear_aca,
1579 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1580 .lldd_lu_reset = hisi_sas_lu_reset,
1581 .lldd_query_task = hisi_sas_query_task,
1582 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1583 .lldd_port_formed = hisi_sas_port_formed,
1584 };
1585
1586 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1587 {
1588 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1589
1590 for (i = 0; i < hisi_hba->queue_count; i++) {
1591 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1592 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1593
1594 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1595 memset(hisi_hba->cmd_hdr[i], 0, s);
1596 dq->wr_point = 0;
1597
1598 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1599 memset(hisi_hba->complete_hdr[i], 0, s);
1600 cq->rd_point = 0;
1601 }
1602
1603 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1604 memset(hisi_hba->initial_fis, 0, s);
1605
1606 s = max_command_entries * sizeof(struct hisi_sas_iost);
1607 memset(hisi_hba->iost, 0, s);
1608
1609 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1610 memset(hisi_hba->breakpoint, 0, s);
1611
1612 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1613 memset(hisi_hba->sata_breakpoint, 0, s);
1614 }
1615 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1616
1617 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1618 {
1619 struct device *dev = hisi_hba->dev;
1620 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1621
1622 spin_lock_init(&hisi_hba->lock);
1623 for (i = 0; i < hisi_hba->n_phy; i++) {
1624 hisi_sas_phy_init(hisi_hba, i);
1625 hisi_hba->port[i].port_attached = 0;
1626 hisi_hba->port[i].id = -1;
1627 }
1628
1629 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1630 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1631 hisi_hba->devices[i].device_id = i;
1632 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1633 }
1634
1635 for (i = 0; i < hisi_hba->queue_count; i++) {
1636 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1637 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1638
1639 /* Completion queue structure */
1640 cq->id = i;
1641 cq->hisi_hba = hisi_hba;
1642
1643 /* Delivery queue structure */
1644 dq->id = i;
1645 dq->hisi_hba = hisi_hba;
1646
1647 /* Delivery queue */
1648 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1649 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1650 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1651 if (!hisi_hba->cmd_hdr[i])
1652 goto err_out;
1653
1654 /* Completion queue */
1655 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1656 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1657 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1658 if (!hisi_hba->complete_hdr[i])
1659 goto err_out;
1660 }
1661
1662 s = sizeof(struct hisi_sas_slot_buf_table);
1663 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1664 if (!hisi_hba->buffer_pool)
1665 goto err_out;
1666
1667 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1668 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1669 GFP_KERNEL);
1670 if (!hisi_hba->itct)
1671 goto err_out;
1672
1673 memset(hisi_hba->itct, 0, s);
1674
1675 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1676 sizeof(struct hisi_sas_slot),
1677 GFP_KERNEL);
1678 if (!hisi_hba->slot_info)
1679 goto err_out;
1680
1681 s = max_command_entries * sizeof(struct hisi_sas_iost);
1682 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1683 GFP_KERNEL);
1684 if (!hisi_hba->iost)
1685 goto err_out;
1686
1687 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1688 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1689 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1690 if (!hisi_hba->breakpoint)
1691 goto err_out;
1692
1693 hisi_hba->slot_index_count = max_command_entries;
1694 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1695 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1696 if (!hisi_hba->slot_index_tags)
1697 goto err_out;
1698
1699 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1700 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1701 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1702 if (!hisi_hba->initial_fis)
1703 goto err_out;
1704
1705 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1706 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1707 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1708 if (!hisi_hba->sata_breakpoint)
1709 goto err_out;
1710 hisi_sas_init_mem(hisi_hba);
1711
1712 hisi_sas_slot_index_init(hisi_hba);
1713
1714 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1715 if (!hisi_hba->wq) {
1716 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1717 goto err_out;
1718 }
1719
1720 return 0;
1721 err_out:
1722 return -ENOMEM;
1723 }
1724 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1725
1726 void hisi_sas_free(struct hisi_hba *hisi_hba)
1727 {
1728 struct device *dev = hisi_hba->dev;
1729 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1730
1731 for (i = 0; i < hisi_hba->queue_count; i++) {
1732 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1733 if (hisi_hba->cmd_hdr[i])
1734 dma_free_coherent(dev, s,
1735 hisi_hba->cmd_hdr[i],
1736 hisi_hba->cmd_hdr_dma[i]);
1737
1738 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1739 if (hisi_hba->complete_hdr[i])
1740 dma_free_coherent(dev, s,
1741 hisi_hba->complete_hdr[i],
1742 hisi_hba->complete_hdr_dma[i]);
1743 }
1744
1745 dma_pool_destroy(hisi_hba->buffer_pool);
1746
1747 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1748 if (hisi_hba->itct)
1749 dma_free_coherent(dev, s,
1750 hisi_hba->itct, hisi_hba->itct_dma);
1751
1752 s = max_command_entries * sizeof(struct hisi_sas_iost);
1753 if (hisi_hba->iost)
1754 dma_free_coherent(dev, s,
1755 hisi_hba->iost, hisi_hba->iost_dma);
1756
1757 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1758 if (hisi_hba->breakpoint)
1759 dma_free_coherent(dev, s,
1760 hisi_hba->breakpoint,
1761 hisi_hba->breakpoint_dma);
1762
1763
1764 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1765 if (hisi_hba->initial_fis)
1766 dma_free_coherent(dev, s,
1767 hisi_hba->initial_fis,
1768 hisi_hba->initial_fis_dma);
1769
1770 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1771 if (hisi_hba->sata_breakpoint)
1772 dma_free_coherent(dev, s,
1773 hisi_hba->sata_breakpoint,
1774 hisi_hba->sata_breakpoint_dma);
1775
1776 if (hisi_hba->wq)
1777 destroy_workqueue(hisi_hba->wq);
1778 }
1779 EXPORT_SYMBOL_GPL(hisi_sas_free);
1780
1781 static void hisi_sas_rst_work_handler(struct work_struct *work)
1782 {
1783 struct hisi_hba *hisi_hba =
1784 container_of(work, struct hisi_hba, rst_work);
1785
1786 hisi_sas_controller_reset(hisi_hba);
1787 }
1788
1789 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1790 {
1791 struct device *dev = hisi_hba->dev;
1792 struct platform_device *pdev = hisi_hba->platform_dev;
1793 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1794 struct clk *refclk;
1795
1796 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1797 SAS_ADDR_SIZE)) {
1798 dev_err(dev, "could not get property sas-addr\n");
1799 return -ENOENT;
1800 }
1801
1802 if (np) {
1803 /*
1804 * These properties are only required for platform device-based
1805 * controller with DT firmware.
1806 */
1807 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1808 "hisilicon,sas-syscon");
1809 if (IS_ERR(hisi_hba->ctrl)) {
1810 dev_err(dev, "could not get syscon\n");
1811 return -ENOENT;
1812 }
1813
1814 if (device_property_read_u32(dev, "ctrl-reset-reg",
1815 &hisi_hba->ctrl_reset_reg)) {
1816 dev_err(dev,
1817 "could not get property ctrl-reset-reg\n");
1818 return -ENOENT;
1819 }
1820
1821 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1822 &hisi_hba->ctrl_reset_sts_reg)) {
1823 dev_err(dev,
1824 "could not get property ctrl-reset-sts-reg\n");
1825 return -ENOENT;
1826 }
1827
1828 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1829 &hisi_hba->ctrl_clock_ena_reg)) {
1830 dev_err(dev,
1831 "could not get property ctrl-clock-ena-reg\n");
1832 return -ENOENT;
1833 }
1834 }
1835
1836 refclk = devm_clk_get(dev, NULL);
1837 if (IS_ERR(refclk))
1838 dev_dbg(dev, "no ref clk property\n");
1839 else
1840 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1841
1842 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
1843 dev_err(dev, "could not get property phy-count\n");
1844 return -ENOENT;
1845 }
1846
1847 if (device_property_read_u32(dev, "queue-count",
1848 &hisi_hba->queue_count)) {
1849 dev_err(dev, "could not get property queue-count\n");
1850 return -ENOENT;
1851 }
1852
1853 return 0;
1854 }
1855 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
1856
1857 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1858 const struct hisi_sas_hw *hw)
1859 {
1860 struct resource *res;
1861 struct Scsi_Host *shost;
1862 struct hisi_hba *hisi_hba;
1863 struct device *dev = &pdev->dev;
1864
1865 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1866 if (!shost) {
1867 dev_err(dev, "scsi host alloc failed\n");
1868 return NULL;
1869 }
1870 hisi_hba = shost_priv(shost);
1871
1872 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1873 hisi_hba->hw = hw;
1874 hisi_hba->dev = dev;
1875 hisi_hba->platform_dev = pdev;
1876 hisi_hba->shost = shost;
1877 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1878
1879 init_timer(&hisi_hba->timer);
1880
1881 if (hisi_sas_get_fw_info(hisi_hba) < 0)
1882 goto err_out;
1883
1884 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1885 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1886 dev_err(dev, "No usable DMA addressing method\n");
1887 goto err_out;
1888 }
1889
1890 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1891 hisi_hba->regs = devm_ioremap_resource(dev, res);
1892 if (IS_ERR(hisi_hba->regs))
1893 goto err_out;
1894
1895 if (hisi_sas_alloc(hisi_hba, shost)) {
1896 hisi_sas_free(hisi_hba);
1897 goto err_out;
1898 }
1899
1900 return shost;
1901 err_out:
1902 scsi_host_put(shost);
1903 dev_err(dev, "shost alloc failed\n");
1904 return NULL;
1905 }
1906
1907 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1908 {
1909 int i;
1910
1911 for (i = 0; i < hisi_hba->n_phy; i++)
1912 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1913 hisi_hba->sas_addr,
1914 SAS_ADDR_SIZE);
1915 }
1916 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
1917
1918 int hisi_sas_probe(struct platform_device *pdev,
1919 const struct hisi_sas_hw *hw)
1920 {
1921 struct Scsi_Host *shost;
1922 struct hisi_hba *hisi_hba;
1923 struct device *dev = &pdev->dev;
1924 struct asd_sas_phy **arr_phy;
1925 struct asd_sas_port **arr_port;
1926 struct sas_ha_struct *sha;
1927 int rc, phy_nr, port_nr, i;
1928
1929 shost = hisi_sas_shost_alloc(pdev, hw);
1930 if (!shost)
1931 return -ENOMEM;
1932
1933 sha = SHOST_TO_SAS_HA(shost);
1934 hisi_hba = shost_priv(shost);
1935 platform_set_drvdata(pdev, sha);
1936
1937 phy_nr = port_nr = hisi_hba->n_phy;
1938
1939 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1940 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1941 if (!arr_phy || !arr_port) {
1942 rc = -ENOMEM;
1943 goto err_out_ha;
1944 }
1945
1946 sha->sas_phy = arr_phy;
1947 sha->sas_port = arr_port;
1948 sha->lldd_ha = hisi_hba;
1949
1950 shost->transportt = hisi_sas_stt;
1951 shost->max_id = HISI_SAS_MAX_DEVICES;
1952 shost->max_lun = ~0;
1953 shost->max_channel = 1;
1954 shost->max_cmd_len = 16;
1955 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1956 shost->can_queue = hisi_hba->hw->max_command_entries;
1957 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1958
1959 sha->sas_ha_name = DRV_NAME;
1960 sha->dev = hisi_hba->dev;
1961 sha->lldd_module = THIS_MODULE;
1962 sha->sas_addr = &hisi_hba->sas_addr[0];
1963 sha->num_phys = hisi_hba->n_phy;
1964 sha->core.shost = hisi_hba->shost;
1965
1966 for (i = 0; i < hisi_hba->n_phy; i++) {
1967 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1968 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1969 }
1970
1971 hisi_sas_init_add(hisi_hba);
1972
1973 rc = scsi_add_host(shost, &pdev->dev);
1974 if (rc)
1975 goto err_out_ha;
1976
1977 rc = sas_register_ha(sha);
1978 if (rc)
1979 goto err_out_register_ha;
1980
1981 rc = hisi_hba->hw->hw_init(hisi_hba);
1982 if (rc)
1983 goto err_out_register_ha;
1984
1985 scsi_scan_host(shost);
1986
1987 return 0;
1988
1989 err_out_register_ha:
1990 scsi_remove_host(shost);
1991 err_out_ha:
1992 hisi_sas_free(hisi_hba);
1993 scsi_host_put(shost);
1994 return rc;
1995 }
1996 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1997
1998 int hisi_sas_remove(struct platform_device *pdev)
1999 {
2000 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2001 struct hisi_hba *hisi_hba = sha->lldd_ha;
2002 struct Scsi_Host *shost = sha->core.shost;
2003
2004 sas_unregister_ha(sha);
2005 sas_remove_host(sha->core.shost);
2006
2007 hisi_sas_free(hisi_hba);
2008 scsi_host_put(shost);
2009 return 0;
2010 }
2011 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2012
2013 static __init int hisi_sas_init(void)
2014 {
2015 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2016 if (!hisi_sas_stt)
2017 return -ENOMEM;
2018
2019 return 0;
2020 }
2021
2022 static __exit void hisi_sas_exit(void)
2023 {
2024 sas_release_transport(hisi_sas_stt);
2025 }
2026
2027 module_init(hisi_sas_init);
2028 module_exit(hisi_sas_exit);
2029
2030 MODULE_LICENSE("GPL");
2031 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2032 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2033 MODULE_ALIAS("platform:" DRV_NAME);
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