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scsi: hisi_sas: add an mechanism to do reset work synchronously
[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 (!task->lldd_task)
189 return;
190
191 task->lldd_task = NULL;
192
193 if (!sas_protocol_ata(task->task_proto))
194 if (slot->n_elem)
195 dma_unmap_sg(dev, task->scatter,
196 task->num_scatter,
197 task->data_dir);
198
199 if (sas_dev)
200 atomic64_dec(&sas_dev->running_req);
201 }
202
203 if (slot->buf)
204 dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
205
206 list_del_init(&slot->entry);
207 slot->buf = NULL;
208 slot->task = NULL;
209 slot->port = NULL;
210 hisi_sas_slot_index_free(hisi_hba, slot->idx);
211
212 /* slot memory is fully zeroed when it is reused */
213 }
214 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
215
216 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
217 struct hisi_sas_slot *slot)
218 {
219 return hisi_hba->hw->prep_smp(hisi_hba, slot);
220 }
221
222 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
223 struct hisi_sas_slot *slot, int is_tmf,
224 struct hisi_sas_tmf_task *tmf)
225 {
226 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
227 }
228
229 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
230 struct hisi_sas_slot *slot)
231 {
232 return hisi_hba->hw->prep_stp(hisi_hba, slot);
233 }
234
235 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
236 struct hisi_sas_slot *slot,
237 int device_id, int abort_flag, int tag_to_abort)
238 {
239 return hisi_hba->hw->prep_abort(hisi_hba, slot,
240 device_id, abort_flag, tag_to_abort);
241 }
242
243 /*
244 * This function will issue an abort TMF regardless of whether the
245 * task is in the sdev or not. Then it will do the task complete
246 * cleanup and callbacks.
247 */
248 static void hisi_sas_slot_abort(struct work_struct *work)
249 {
250 struct hisi_sas_slot *abort_slot =
251 container_of(work, struct hisi_sas_slot, abort_slot);
252 struct sas_task *task = abort_slot->task;
253 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
254 struct scsi_cmnd *cmnd = task->uldd_task;
255 struct hisi_sas_tmf_task tmf_task;
256 struct scsi_lun lun;
257 struct device *dev = hisi_hba->dev;
258 int tag = abort_slot->idx;
259 unsigned long flags;
260
261 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
262 dev_err(dev, "cannot abort slot for non-ssp task\n");
263 goto out;
264 }
265
266 int_to_scsilun(cmnd->device->lun, &lun);
267 tmf_task.tmf = TMF_ABORT_TASK;
268 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
269
270 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
271 out:
272 /* Do cleanup for this task */
273 spin_lock_irqsave(&hisi_hba->lock, flags);
274 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
275 spin_unlock_irqrestore(&hisi_hba->lock, flags);
276 if (task->task_done)
277 task->task_done(task);
278 }
279
280 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
281 *dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
282 int *pass)
283 {
284 struct hisi_hba *hisi_hba = dq->hisi_hba;
285 struct domain_device *device = task->dev;
286 struct hisi_sas_device *sas_dev = device->lldd_dev;
287 struct hisi_sas_port *port;
288 struct hisi_sas_slot *slot;
289 struct hisi_sas_cmd_hdr *cmd_hdr_base;
290 struct asd_sas_port *sas_port = device->port;
291 struct device *dev = hisi_hba->dev;
292 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
293 unsigned long flags;
294
295 if (!sas_port) {
296 struct task_status_struct *ts = &task->task_status;
297
298 ts->resp = SAS_TASK_UNDELIVERED;
299 ts->stat = SAS_PHY_DOWN;
300 /*
301 * libsas will use dev->port, should
302 * not call task_done for sata
303 */
304 if (device->dev_type != SAS_SATA_DEV)
305 task->task_done(task);
306 return SAS_PHY_DOWN;
307 }
308
309 if (DEV_IS_GONE(sas_dev)) {
310 if (sas_dev)
311 dev_info(dev, "task prep: device %d not ready\n",
312 sas_dev->device_id);
313 else
314 dev_info(dev, "task prep: device %016llx not ready\n",
315 SAS_ADDR(device->sas_addr));
316
317 return SAS_PHY_DOWN;
318 }
319
320 port = to_hisi_sas_port(sas_port);
321 if (port && !port->port_attached) {
322 dev_info(dev, "task prep: %s port%d not attach device\n",
323 (dev_is_sata(device)) ?
324 "SATA/STP" : "SAS",
325 device->port->id);
326
327 return SAS_PHY_DOWN;
328 }
329
330 if (!sas_protocol_ata(task->task_proto)) {
331 if (task->num_scatter) {
332 n_elem = dma_map_sg(dev, task->scatter,
333 task->num_scatter, task->data_dir);
334 if (!n_elem) {
335 rc = -ENOMEM;
336 goto prep_out;
337 }
338 }
339 } else
340 n_elem = task->num_scatter;
341
342 spin_lock_irqsave(&hisi_hba->lock, flags);
343 if (hisi_hba->hw->slot_index_alloc)
344 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
345 device);
346 else
347 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
348 if (rc) {
349 spin_unlock_irqrestore(&hisi_hba->lock, flags);
350 goto err_out;
351 }
352 spin_unlock_irqrestore(&hisi_hba->lock, flags);
353
354 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
355 if (rc)
356 goto err_out_tag;
357
358 dlvry_queue = dq->id;
359 dlvry_queue_slot = dq->wr_point;
360 slot = &hisi_hba->slot_info[slot_idx];
361 memset(slot, 0, sizeof(struct hisi_sas_slot));
362
363 slot->idx = slot_idx;
364 slot->n_elem = n_elem;
365 slot->dlvry_queue = dlvry_queue;
366 slot->dlvry_queue_slot = dlvry_queue_slot;
367 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
368 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
369 slot->task = task;
370 slot->port = port;
371 task->lldd_task = slot;
372 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
373
374 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
375 GFP_ATOMIC, &slot->buf_dma);
376 if (!slot->buf) {
377 rc = -ENOMEM;
378 goto err_out_slot_buf;
379 }
380 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
381 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
382 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
383
384 switch (task->task_proto) {
385 case SAS_PROTOCOL_SMP:
386 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
387 break;
388 case SAS_PROTOCOL_SSP:
389 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
390 break;
391 case SAS_PROTOCOL_SATA:
392 case SAS_PROTOCOL_STP:
393 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
394 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
395 break;
396 default:
397 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
398 task->task_proto);
399 rc = -EINVAL;
400 break;
401 }
402
403 if (rc) {
404 dev_err(dev, "task prep: rc = 0x%x\n", rc);
405 goto err_out_buf;
406 }
407
408 spin_lock_irqsave(&hisi_hba->lock, flags);
409 list_add_tail(&slot->entry, &sas_dev->list);
410 spin_unlock_irqrestore(&hisi_hba->lock, flags);
411 spin_lock_irqsave(&task->task_state_lock, flags);
412 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
413 spin_unlock_irqrestore(&task->task_state_lock, flags);
414
415 dq->slot_prep = slot;
416
417 atomic64_inc(&sas_dev->running_req);
418 ++(*pass);
419
420 return 0;
421
422 err_out_buf:
423 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
424 slot->buf_dma);
425 err_out_slot_buf:
426 /* Nothing to be done */
427 err_out_tag:
428 spin_lock_irqsave(&hisi_hba->lock, flags);
429 hisi_sas_slot_index_free(hisi_hba, slot_idx);
430 spin_unlock_irqrestore(&hisi_hba->lock, flags);
431 err_out:
432 dev_err(dev, "task prep: failed[%d]!\n", rc);
433 if (!sas_protocol_ata(task->task_proto))
434 if (n_elem)
435 dma_unmap_sg(dev, task->scatter,
436 task->num_scatter,
437 task->data_dir);
438 prep_out:
439 return rc;
440 }
441
442 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
443 int is_tmf, struct hisi_sas_tmf_task *tmf)
444 {
445 u32 rc;
446 u32 pass = 0;
447 unsigned long flags;
448 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
449 struct device *dev = hisi_hba->dev;
450 struct domain_device *device = task->dev;
451 struct hisi_sas_device *sas_dev = device->lldd_dev;
452 struct hisi_sas_dq *dq = sas_dev->dq;
453
454 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
455 return -EINVAL;
456
457 /* protect task_prep and start_delivery sequence */
458 spin_lock_irqsave(&dq->lock, flags);
459 rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
460 if (rc)
461 dev_err(dev, "task exec: failed[%d]!\n", rc);
462
463 if (likely(pass))
464 hisi_hba->hw->start_delivery(dq);
465 spin_unlock_irqrestore(&dq->lock, flags);
466
467 return rc;
468 }
469
470 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
471 {
472 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
473 struct asd_sas_phy *sas_phy = &phy->sas_phy;
474 struct sas_ha_struct *sas_ha;
475
476 if (!phy->phy_attached)
477 return;
478
479 sas_ha = &hisi_hba->sha;
480 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
481
482 if (sas_phy->phy) {
483 struct sas_phy *sphy = sas_phy->phy;
484
485 sphy->negotiated_linkrate = sas_phy->linkrate;
486 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
487 sphy->maximum_linkrate_hw =
488 hisi_hba->hw->phy_get_max_linkrate();
489 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
490 sphy->minimum_linkrate = phy->minimum_linkrate;
491
492 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
493 sphy->maximum_linkrate = phy->maximum_linkrate;
494 }
495
496 if (phy->phy_type & PORT_TYPE_SAS) {
497 struct sas_identify_frame *id;
498
499 id = (struct sas_identify_frame *)phy->frame_rcvd;
500 id->dev_type = phy->identify.device_type;
501 id->initiator_bits = SAS_PROTOCOL_ALL;
502 id->target_bits = phy->identify.target_port_protocols;
503 } else if (phy->phy_type & PORT_TYPE_SATA) {
504 /*Nothing*/
505 }
506
507 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
508 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
509 }
510
511 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
512 {
513 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
514 struct hisi_sas_device *sas_dev = NULL;
515 unsigned long flags;
516 int i;
517
518 spin_lock_irqsave(&hisi_hba->lock, flags);
519 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
520 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
521 int queue = i % hisi_hba->queue_count;
522 struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
523
524 hisi_hba->devices[i].device_id = i;
525 sas_dev = &hisi_hba->devices[i];
526 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
527 sas_dev->dev_type = device->dev_type;
528 sas_dev->hisi_hba = hisi_hba;
529 sas_dev->sas_device = device;
530 sas_dev->dq = dq;
531 INIT_LIST_HEAD(&hisi_hba->devices[i].list);
532 break;
533 }
534 }
535 spin_unlock_irqrestore(&hisi_hba->lock, flags);
536
537 return sas_dev;
538 }
539
540 static int hisi_sas_dev_found(struct domain_device *device)
541 {
542 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
543 struct domain_device *parent_dev = device->parent;
544 struct hisi_sas_device *sas_dev;
545 struct device *dev = hisi_hba->dev;
546
547 if (hisi_hba->hw->alloc_dev)
548 sas_dev = hisi_hba->hw->alloc_dev(device);
549 else
550 sas_dev = hisi_sas_alloc_dev(device);
551 if (!sas_dev) {
552 dev_err(dev, "fail alloc dev: max support %d devices\n",
553 HISI_SAS_MAX_DEVICES);
554 return -EINVAL;
555 }
556
557 device->lldd_dev = sas_dev;
558 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
559
560 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
561 int phy_no;
562 u8 phy_num = parent_dev->ex_dev.num_phys;
563 struct ex_phy *phy;
564
565 for (phy_no = 0; phy_no < phy_num; phy_no++) {
566 phy = &parent_dev->ex_dev.ex_phy[phy_no];
567 if (SAS_ADDR(phy->attached_sas_addr) ==
568 SAS_ADDR(device->sas_addr)) {
569 sas_dev->attached_phy = phy_no;
570 break;
571 }
572 }
573
574 if (phy_no == phy_num) {
575 dev_info(dev, "dev found: no attached "
576 "dev:%016llx at ex:%016llx\n",
577 SAS_ADDR(device->sas_addr),
578 SAS_ADDR(parent_dev->sas_addr));
579 return -EINVAL;
580 }
581 }
582
583 return 0;
584 }
585
586 static int hisi_sas_slave_configure(struct scsi_device *sdev)
587 {
588 struct domain_device *dev = sdev_to_domain_dev(sdev);
589 int ret = sas_slave_configure(sdev);
590
591 if (ret)
592 return ret;
593 if (!dev_is_sata(dev))
594 sas_change_queue_depth(sdev, 64);
595
596 return 0;
597 }
598
599 static void hisi_sas_scan_start(struct Scsi_Host *shost)
600 {
601 struct hisi_hba *hisi_hba = shost_priv(shost);
602
603 hisi_hba->hw->phys_init(hisi_hba);
604 }
605
606 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
607 {
608 struct hisi_hba *hisi_hba = shost_priv(shost);
609 struct sas_ha_struct *sha = &hisi_hba->sha;
610
611 /* Wait for PHY up interrupt to occur */
612 if (time < HZ)
613 return 0;
614
615 sas_drain_work(sha);
616 return 1;
617 }
618
619 static void hisi_sas_phyup_work(struct work_struct *work)
620 {
621 struct hisi_sas_phy *phy =
622 container_of(work, struct hisi_sas_phy, phyup_ws);
623 struct hisi_hba *hisi_hba = phy->hisi_hba;
624 struct asd_sas_phy *sas_phy = &phy->sas_phy;
625 int phy_no = sas_phy->id;
626
627 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
628 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
629 }
630
631 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
632 {
633 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
634 struct asd_sas_phy *sas_phy = &phy->sas_phy;
635
636 phy->hisi_hba = hisi_hba;
637 phy->port = NULL;
638 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
639 sas_phy->class = SAS;
640 sas_phy->iproto = SAS_PROTOCOL_ALL;
641 sas_phy->tproto = 0;
642 sas_phy->type = PHY_TYPE_PHYSICAL;
643 sas_phy->role = PHY_ROLE_INITIATOR;
644 sas_phy->oob_mode = OOB_NOT_CONNECTED;
645 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
646 sas_phy->id = phy_no;
647 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
648 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
649 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
650 sas_phy->lldd_phy = phy;
651
652 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
653 }
654
655 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
656 {
657 struct sas_ha_struct *sas_ha = sas_phy->ha;
658 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
659 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
660 struct asd_sas_port *sas_port = sas_phy->port;
661 struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
662 unsigned long flags;
663
664 if (!sas_port)
665 return;
666
667 spin_lock_irqsave(&hisi_hba->lock, flags);
668 port->port_attached = 1;
669 port->id = phy->port_id;
670 phy->port = port;
671 sas_port->lldd_port = port;
672 spin_unlock_irqrestore(&hisi_hba->lock, flags);
673 }
674
675 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
676 struct hisi_sas_slot *slot)
677 {
678 if (task) {
679 unsigned long flags;
680 struct task_status_struct *ts;
681
682 ts = &task->task_status;
683
684 ts->resp = SAS_TASK_COMPLETE;
685 ts->stat = SAS_ABORTED_TASK;
686 spin_lock_irqsave(&task->task_state_lock, flags);
687 task->task_state_flags &=
688 ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
689 task->task_state_flags |= SAS_TASK_STATE_DONE;
690 spin_unlock_irqrestore(&task->task_state_lock, flags);
691 }
692
693 hisi_sas_slot_task_free(hisi_hba, task, slot);
694 }
695
696 /* hisi_hba.lock should be locked */
697 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
698 struct domain_device *device)
699 {
700 struct hisi_sas_slot *slot, *slot2;
701 struct hisi_sas_device *sas_dev = device->lldd_dev;
702
703 list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
704 hisi_sas_do_release_task(hisi_hba, slot->task, slot);
705 }
706
707 static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
708 {
709 struct hisi_sas_device *sas_dev;
710 struct domain_device *device;
711 int i;
712
713 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
714 sas_dev = &hisi_hba->devices[i];
715 device = sas_dev->sas_device;
716
717 if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
718 !device)
719 continue;
720
721 hisi_sas_release_task(hisi_hba, device);
722 }
723 }
724
725 static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
726 struct domain_device *device)
727 {
728 if (hisi_hba->hw->dereg_device)
729 hisi_hba->hw->dereg_device(hisi_hba, device);
730 }
731
732 static void hisi_sas_dev_gone(struct domain_device *device)
733 {
734 struct hisi_sas_device *sas_dev = device->lldd_dev;
735 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
736 struct device *dev = hisi_hba->dev;
737
738 dev_info(dev, "found dev[%d:%x] is gone\n",
739 sas_dev->device_id, sas_dev->dev_type);
740
741 if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
742 hisi_sas_internal_task_abort(hisi_hba, device,
743 HISI_SAS_INT_ABT_DEV, 0);
744
745 hisi_sas_dereg_device(hisi_hba, device);
746
747 hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
748 device->lldd_dev = NULL;
749 memset(sas_dev, 0, sizeof(*sas_dev));
750 }
751
752 if (hisi_hba->hw->free_device)
753 hisi_hba->hw->free_device(sas_dev);
754 sas_dev->dev_type = SAS_PHY_UNUSED;
755 }
756
757 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
758 {
759 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
760 }
761
762 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
763 void *funcdata)
764 {
765 struct sas_ha_struct *sas_ha = sas_phy->ha;
766 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
767 int phy_no = sas_phy->id;
768
769 switch (func) {
770 case PHY_FUNC_HARD_RESET:
771 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
772 break;
773
774 case PHY_FUNC_LINK_RESET:
775 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
776 msleep(100);
777 hisi_hba->hw->phy_start(hisi_hba, phy_no);
778 break;
779
780 case PHY_FUNC_DISABLE:
781 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
782 break;
783
784 case PHY_FUNC_SET_LINK_RATE:
785 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
786 break;
787 case PHY_FUNC_GET_EVENTS:
788 if (hisi_hba->hw->get_events) {
789 hisi_hba->hw->get_events(hisi_hba, phy_no);
790 break;
791 }
792 /* fallthru */
793 case PHY_FUNC_RELEASE_SPINUP_HOLD:
794 default:
795 return -EOPNOTSUPP;
796 }
797 return 0;
798 }
799
800 static void hisi_sas_task_done(struct sas_task *task)
801 {
802 if (!del_timer(&task->slow_task->timer))
803 return;
804 complete(&task->slow_task->completion);
805 }
806
807 static void hisi_sas_tmf_timedout(struct timer_list *t)
808 {
809 struct sas_task_slow *slow = from_timer(slow, t, timer);
810 struct sas_task *task = slow->task;
811 unsigned long flags;
812
813 spin_lock_irqsave(&task->task_state_lock, flags);
814 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
815 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
816 spin_unlock_irqrestore(&task->task_state_lock, flags);
817
818 complete(&task->slow_task->completion);
819 }
820
821 #define TASK_TIMEOUT 20
822 #define TASK_RETRY 3
823 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
824 void *parameter, u32 para_len,
825 struct hisi_sas_tmf_task *tmf)
826 {
827 struct hisi_sas_device *sas_dev = device->lldd_dev;
828 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
829 struct device *dev = hisi_hba->dev;
830 struct sas_task *task;
831 int res, retry;
832
833 for (retry = 0; retry < TASK_RETRY; retry++) {
834 task = sas_alloc_slow_task(GFP_KERNEL);
835 if (!task)
836 return -ENOMEM;
837
838 task->dev = device;
839 task->task_proto = device->tproto;
840
841 if (dev_is_sata(device)) {
842 task->ata_task.device_control_reg_update = 1;
843 memcpy(&task->ata_task.fis, parameter, para_len);
844 } else {
845 memcpy(&task->ssp_task, parameter, para_len);
846 }
847 task->task_done = hisi_sas_task_done;
848
849 task->slow_task->timer.function = hisi_sas_tmf_timedout;
850 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
851 add_timer(&task->slow_task->timer);
852
853 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
854
855 if (res) {
856 del_timer(&task->slow_task->timer);
857 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
858 res);
859 goto ex_err;
860 }
861
862 wait_for_completion(&task->slow_task->completion);
863 res = TMF_RESP_FUNC_FAILED;
864 /* Even TMF timed out, return direct. */
865 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
866 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
867 struct hisi_sas_slot *slot = task->lldd_task;
868
869 dev_err(dev, "abort tmf: TMF task timeout\n");
870 if (slot)
871 slot->task = NULL;
872
873 goto ex_err;
874 }
875 }
876
877 if (task->task_status.resp == SAS_TASK_COMPLETE &&
878 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
879 res = TMF_RESP_FUNC_COMPLETE;
880 break;
881 }
882
883 if (task->task_status.resp == SAS_TASK_COMPLETE &&
884 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
885 res = TMF_RESP_FUNC_SUCC;
886 break;
887 }
888
889 if (task->task_status.resp == SAS_TASK_COMPLETE &&
890 task->task_status.stat == SAS_DATA_UNDERRUN) {
891 /* no error, but return the number of bytes of
892 * underrun
893 */
894 dev_warn(dev, "abort tmf: task to dev %016llx "
895 "resp: 0x%x sts 0x%x underrun\n",
896 SAS_ADDR(device->sas_addr),
897 task->task_status.resp,
898 task->task_status.stat);
899 res = task->task_status.residual;
900 break;
901 }
902
903 if (task->task_status.resp == SAS_TASK_COMPLETE &&
904 task->task_status.stat == SAS_DATA_OVERRUN) {
905 dev_warn(dev, "abort tmf: blocked task error\n");
906 res = -EMSGSIZE;
907 break;
908 }
909
910 dev_warn(dev, "abort tmf: task to dev "
911 "%016llx resp: 0x%x status 0x%x\n",
912 SAS_ADDR(device->sas_addr), task->task_status.resp,
913 task->task_status.stat);
914 sas_free_task(task);
915 task = NULL;
916 }
917 ex_err:
918 if (retry == TASK_RETRY)
919 dev_warn(dev, "abort tmf: executing internal task failed!\n");
920 sas_free_task(task);
921 return res;
922 }
923
924 static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
925 bool reset, int pmp, u8 *fis)
926 {
927 struct ata_taskfile tf;
928
929 ata_tf_init(dev, &tf);
930 if (reset)
931 tf.ctl |= ATA_SRST;
932 else
933 tf.ctl &= ~ATA_SRST;
934 tf.command = ATA_CMD_DEV_RESET;
935 ata_tf_to_fis(&tf, pmp, 0, fis);
936 }
937
938 static int hisi_sas_softreset_ata_disk(struct domain_device *device)
939 {
940 u8 fis[20] = {0};
941 struct ata_port *ap = device->sata_dev.ap;
942 struct ata_link *link;
943 int rc = TMF_RESP_FUNC_FAILED;
944 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
945 struct device *dev = hisi_hba->dev;
946 int s = sizeof(struct host_to_dev_fis);
947 unsigned long flags;
948
949 ata_for_each_link(link, ap, EDGE) {
950 int pmp = sata_srst_pmp(link);
951
952 hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
953 rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
954 if (rc != TMF_RESP_FUNC_COMPLETE)
955 break;
956 }
957
958 if (rc == TMF_RESP_FUNC_COMPLETE) {
959 ata_for_each_link(link, ap, EDGE) {
960 int pmp = sata_srst_pmp(link);
961
962 hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
963 rc = hisi_sas_exec_internal_tmf_task(device, fis,
964 s, NULL);
965 if (rc != TMF_RESP_FUNC_COMPLETE)
966 dev_err(dev, "ata disk de-reset failed\n");
967 }
968 } else {
969 dev_err(dev, "ata disk reset failed\n");
970 }
971
972 if (rc == TMF_RESP_FUNC_COMPLETE) {
973 spin_lock_irqsave(&hisi_hba->lock, flags);
974 hisi_sas_release_task(hisi_hba, device);
975 spin_unlock_irqrestore(&hisi_hba->lock, flags);
976 }
977
978 return rc;
979 }
980
981 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
982 u8 *lun, struct hisi_sas_tmf_task *tmf)
983 {
984 struct sas_ssp_task ssp_task;
985
986 if (!(device->tproto & SAS_PROTOCOL_SSP))
987 return TMF_RESP_FUNC_ESUPP;
988
989 memcpy(ssp_task.LUN, lun, 8);
990
991 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
992 sizeof(ssp_task), tmf);
993 }
994
995 static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
996 {
997 u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
998 int i;
999
1000 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1001 struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
1002 struct domain_device *device = sas_dev->sas_device;
1003 struct asd_sas_port *sas_port;
1004 struct hisi_sas_port *port;
1005 struct hisi_sas_phy *phy = NULL;
1006 struct asd_sas_phy *sas_phy;
1007
1008 if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1009 || !device || !device->port)
1010 continue;
1011
1012 sas_port = device->port;
1013 port = to_hisi_sas_port(sas_port);
1014
1015 list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
1016 if (state & BIT(sas_phy->id)) {
1017 phy = sas_phy->lldd_phy;
1018 break;
1019 }
1020
1021 if (phy) {
1022 port->id = phy->port_id;
1023
1024 /* Update linkrate of directly attached device. */
1025 if (!device->parent)
1026 device->linkrate = phy->sas_phy.linkrate;
1027
1028 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
1029 } else
1030 port->id = 0xff;
1031 }
1032 }
1033
1034 static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
1035 u32 state)
1036 {
1037 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1038 struct asd_sas_port *_sas_port = NULL;
1039 int phy_no;
1040
1041 for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
1042 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1043 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1044 struct asd_sas_port *sas_port = sas_phy->port;
1045 bool do_port_check = !!(_sas_port != sas_port);
1046
1047 if (!sas_phy->phy->enabled)
1048 continue;
1049
1050 /* Report PHY state change to libsas */
1051 if (state & BIT(phy_no)) {
1052 if (do_port_check && sas_port && sas_port->port_dev) {
1053 struct domain_device *dev = sas_port->port_dev;
1054
1055 _sas_port = sas_port;
1056
1057 if (DEV_IS_EXPANDER(dev->dev_type))
1058 sas_ha->notify_port_event(sas_phy,
1059 PORTE_BROADCAST_RCVD);
1060 }
1061 } else if (old_state & (1 << phy_no))
1062 /* PHY down but was up before */
1063 hisi_sas_phy_down(hisi_hba, phy_no, 0);
1064
1065 }
1066 }
1067
1068 static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
1069 {
1070 struct device *dev = hisi_hba->dev;
1071 struct Scsi_Host *shost = hisi_hba->shost;
1072 u32 old_state, state;
1073 unsigned long flags;
1074 int rc;
1075
1076 if (!hisi_hba->hw->soft_reset)
1077 return -1;
1078
1079 if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
1080 return -1;
1081
1082 dev_info(dev, "controller resetting...\n");
1083 old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1084
1085 scsi_block_requests(shost);
1086 set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1087 rc = hisi_hba->hw->soft_reset(hisi_hba);
1088 if (rc) {
1089 dev_warn(dev, "controller reset failed (%d)\n", rc);
1090 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1091 scsi_unblock_requests(shost);
1092 goto out;
1093 }
1094 spin_lock_irqsave(&hisi_hba->lock, flags);
1095 hisi_sas_release_tasks(hisi_hba);
1096 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1097
1098 clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1099
1100 /* Init and wait for PHYs to come up and all libsas event finished. */
1101 hisi_hba->hw->phys_init(hisi_hba);
1102 msleep(1000);
1103 hisi_sas_refresh_port_id(hisi_hba);
1104 scsi_unblock_requests(shost);
1105
1106 state = hisi_hba->hw->get_phys_state(hisi_hba);
1107 hisi_sas_rescan_topology(hisi_hba, old_state, state);
1108 dev_info(dev, "controller reset complete\n");
1109
1110 out:
1111 clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1112
1113 return rc;
1114 }
1115
1116 static int hisi_sas_abort_task(struct sas_task *task)
1117 {
1118 struct scsi_lun lun;
1119 struct hisi_sas_tmf_task tmf_task;
1120 struct domain_device *device = task->dev;
1121 struct hisi_sas_device *sas_dev = device->lldd_dev;
1122 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
1123 struct device *dev = hisi_hba->dev;
1124 int rc = TMF_RESP_FUNC_FAILED;
1125 unsigned long flags;
1126
1127 if (!sas_dev) {
1128 dev_warn(dev, "Device has been removed\n");
1129 return TMF_RESP_FUNC_FAILED;
1130 }
1131
1132 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1133 rc = TMF_RESP_FUNC_COMPLETE;
1134 goto out;
1135 }
1136
1137 sas_dev->dev_status = HISI_SAS_DEV_EH;
1138 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1139 struct scsi_cmnd *cmnd = task->uldd_task;
1140 struct hisi_sas_slot *slot = task->lldd_task;
1141 u32 tag = slot->idx;
1142 int rc2;
1143
1144 int_to_scsilun(cmnd->device->lun, &lun);
1145 tmf_task.tmf = TMF_ABORT_TASK;
1146 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1147
1148 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
1149 &tmf_task);
1150
1151 rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
1152 HISI_SAS_INT_ABT_CMD, tag);
1153 /*
1154 * If the TMF finds that the IO is not in the device and also
1155 * the internal abort does not succeed, then it is safe to
1156 * free the slot.
1157 * Note: if the internal abort succeeds then the slot
1158 * will have already been completed
1159 */
1160 if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
1161 if (task->lldd_task) {
1162 spin_lock_irqsave(&hisi_hba->lock, flags);
1163 hisi_sas_do_release_task(hisi_hba, task, slot);
1164 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1165 }
1166 }
1167 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1168 task->task_proto & SAS_PROTOCOL_STP) {
1169 if (task->dev->dev_type == SAS_SATA_DEV) {
1170 hisi_sas_internal_task_abort(hisi_hba, device,
1171 HISI_SAS_INT_ABT_DEV, 0);
1172 hisi_sas_dereg_device(hisi_hba, device);
1173 rc = hisi_sas_softreset_ata_disk(device);
1174 }
1175 } else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1176 /* SMP */
1177 struct hisi_sas_slot *slot = task->lldd_task;
1178 u32 tag = slot->idx;
1179
1180 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1181 HISI_SAS_INT_ABT_CMD, tag);
1182 if (rc == TMF_RESP_FUNC_FAILED && task->lldd_task) {
1183 spin_lock_irqsave(&hisi_hba->lock, flags);
1184 hisi_sas_do_release_task(hisi_hba, task, slot);
1185 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1186 }
1187 }
1188
1189 out:
1190 if (rc != TMF_RESP_FUNC_COMPLETE)
1191 dev_notice(dev, "abort task: rc=%d\n", rc);
1192 return rc;
1193 }
1194
1195 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
1196 {
1197 struct hisi_sas_tmf_task tmf_task;
1198 int rc = TMF_RESP_FUNC_FAILED;
1199
1200 tmf_task.tmf = TMF_ABORT_TASK_SET;
1201 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1202
1203 return rc;
1204 }
1205
1206 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
1207 {
1208 int rc = TMF_RESP_FUNC_FAILED;
1209 struct hisi_sas_tmf_task tmf_task;
1210
1211 tmf_task.tmf = TMF_CLEAR_ACA;
1212 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1213
1214 return rc;
1215 }
1216
1217 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
1218 {
1219 struct sas_phy *phy = sas_get_local_phy(device);
1220 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
1221 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1222 rc = sas_phy_reset(phy, reset_type);
1223 sas_put_local_phy(phy);
1224 msleep(2000);
1225 return rc;
1226 }
1227
1228 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
1229 {
1230 struct hisi_sas_device *sas_dev = device->lldd_dev;
1231 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1232 unsigned long flags;
1233 int rc = TMF_RESP_FUNC_FAILED;
1234
1235 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
1236 return TMF_RESP_FUNC_FAILED;
1237 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
1238
1239 hisi_sas_internal_task_abort(hisi_hba, device,
1240 HISI_SAS_INT_ABT_DEV, 0);
1241 hisi_sas_dereg_device(hisi_hba, device);
1242
1243 rc = hisi_sas_debug_I_T_nexus_reset(device);
1244
1245 if (rc == TMF_RESP_FUNC_COMPLETE) {
1246 spin_lock_irqsave(&hisi_hba->lock, flags);
1247 hisi_sas_release_task(hisi_hba, device);
1248 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1249 }
1250 return rc;
1251 }
1252
1253 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
1254 {
1255 struct hisi_sas_device *sas_dev = device->lldd_dev;
1256 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1257 struct device *dev = hisi_hba->dev;
1258 unsigned long flags;
1259 int rc = TMF_RESP_FUNC_FAILED;
1260
1261 sas_dev->dev_status = HISI_SAS_DEV_EH;
1262 if (dev_is_sata(device)) {
1263 struct sas_phy *phy;
1264
1265 /* Clear internal IO and then hardreset */
1266 rc = hisi_sas_internal_task_abort(hisi_hba, device,
1267 HISI_SAS_INT_ABT_DEV, 0);
1268 if (rc == TMF_RESP_FUNC_FAILED)
1269 goto out;
1270 hisi_sas_dereg_device(hisi_hba, device);
1271
1272 phy = sas_get_local_phy(device);
1273
1274 rc = sas_phy_reset(phy, 1);
1275
1276 if (rc == 0) {
1277 spin_lock_irqsave(&hisi_hba->lock, flags);
1278 hisi_sas_release_task(hisi_hba, device);
1279 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1280 }
1281 sas_put_local_phy(phy);
1282 } else {
1283 struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
1284
1285 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1286 if (rc == TMF_RESP_FUNC_COMPLETE) {
1287 spin_lock_irqsave(&hisi_hba->lock, flags);
1288 hisi_sas_release_task(hisi_hba, device);
1289 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1290 }
1291 }
1292 out:
1293 if (rc != TMF_RESP_FUNC_COMPLETE)
1294 dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1295 sas_dev->device_id, rc);
1296 return rc;
1297 }
1298
1299 static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
1300 {
1301 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1302 HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1303
1304 queue_work(hisi_hba->wq, &r.work);
1305 wait_for_completion(r.completion);
1306 if (r.done)
1307 return TMF_RESP_FUNC_COMPLETE;
1308
1309 return TMF_RESP_FUNC_FAILED;
1310 }
1311
1312 static int hisi_sas_query_task(struct sas_task *task)
1313 {
1314 struct scsi_lun lun;
1315 struct hisi_sas_tmf_task tmf_task;
1316 int rc = TMF_RESP_FUNC_FAILED;
1317
1318 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
1319 struct scsi_cmnd *cmnd = task->uldd_task;
1320 struct domain_device *device = task->dev;
1321 struct hisi_sas_slot *slot = task->lldd_task;
1322 u32 tag = slot->idx;
1323
1324 int_to_scsilun(cmnd->device->lun, &lun);
1325 tmf_task.tmf = TMF_QUERY_TASK;
1326 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
1327
1328 rc = hisi_sas_debug_issue_ssp_tmf(device,
1329 lun.scsi_lun,
1330 &tmf_task);
1331 switch (rc) {
1332 /* The task is still in Lun, release it then */
1333 case TMF_RESP_FUNC_SUCC:
1334 /* The task is not in Lun or failed, reset the phy */
1335 case TMF_RESP_FUNC_FAILED:
1336 case TMF_RESP_FUNC_COMPLETE:
1337 break;
1338 default:
1339 rc = TMF_RESP_FUNC_FAILED;
1340 break;
1341 }
1342 }
1343 return rc;
1344 }
1345
1346 static int
1347 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1348 struct sas_task *task, int abort_flag,
1349 int task_tag)
1350 {
1351 struct domain_device *device = task->dev;
1352 struct hisi_sas_device *sas_dev = device->lldd_dev;
1353 struct device *dev = hisi_hba->dev;
1354 struct hisi_sas_port *port;
1355 struct hisi_sas_slot *slot;
1356 struct asd_sas_port *sas_port = device->port;
1357 struct hisi_sas_cmd_hdr *cmd_hdr_base;
1358 struct hisi_sas_dq *dq = sas_dev->dq;
1359 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1360 unsigned long flags, flags_dq;
1361
1362 if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1363 return -EINVAL;
1364
1365 if (!device->port)
1366 return -1;
1367
1368 port = to_hisi_sas_port(sas_port);
1369
1370 /* simply get a slot and send abort command */
1371 spin_lock_irqsave(&hisi_hba->lock, flags);
1372 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1373 if (rc) {
1374 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1375 goto err_out;
1376 }
1377 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1378
1379 spin_lock_irqsave(&dq->lock, flags_dq);
1380 rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1381 if (rc)
1382 goto err_out_tag;
1383
1384 dlvry_queue = dq->id;
1385 dlvry_queue_slot = dq->wr_point;
1386
1387 slot = &hisi_hba->slot_info[slot_idx];
1388 memset(slot, 0, sizeof(struct hisi_sas_slot));
1389
1390 slot->idx = slot_idx;
1391 slot->n_elem = n_elem;
1392 slot->dlvry_queue = dlvry_queue;
1393 slot->dlvry_queue_slot = dlvry_queue_slot;
1394 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1395 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1396 slot->task = task;
1397 slot->port = port;
1398 task->lldd_task = slot;
1399
1400 slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
1401 GFP_ATOMIC, &slot->buf_dma);
1402 if (!slot->buf) {
1403 rc = -ENOMEM;
1404 goto err_out_tag;
1405 }
1406
1407 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1408 memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
1409 memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
1410
1411 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1412 abort_flag, task_tag);
1413 if (rc)
1414 goto err_out_buf;
1415
1416 spin_lock_irqsave(&hisi_hba->lock, flags);
1417 list_add_tail(&slot->entry, &sas_dev->list);
1418 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1419 spin_lock_irqsave(&task->task_state_lock, flags);
1420 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1421 spin_unlock_irqrestore(&task->task_state_lock, flags);
1422
1423 dq->slot_prep = slot;
1424
1425 atomic64_inc(&sas_dev->running_req);
1426
1427 /* send abort command to the chip */
1428 hisi_hba->hw->start_delivery(dq);
1429 spin_unlock_irqrestore(&dq->lock, flags_dq);
1430
1431 return 0;
1432
1433 err_out_buf:
1434 dma_pool_free(hisi_hba->buffer_pool, slot->buf,
1435 slot->buf_dma);
1436 err_out_tag:
1437 spin_lock_irqsave(&hisi_hba->lock, flags);
1438 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1439 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1440 spin_unlock_irqrestore(&dq->lock, flags_dq);
1441 err_out:
1442 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1443
1444 return rc;
1445 }
1446
1447 /**
1448 * hisi_sas_internal_task_abort -- execute an internal
1449 * abort command for single IO command or a device
1450 * @hisi_hba: host controller struct
1451 * @device: domain device
1452 * @abort_flag: mode of operation, device or single IO
1453 * @tag: tag of IO to be aborted (only relevant to single
1454 * IO mode)
1455 */
1456 static int
1457 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1458 struct domain_device *device,
1459 int abort_flag, int tag)
1460 {
1461 struct sas_task *task;
1462 struct hisi_sas_device *sas_dev = device->lldd_dev;
1463 struct device *dev = hisi_hba->dev;
1464 int res;
1465
1466 if (!hisi_hba->hw->prep_abort)
1467 return -EOPNOTSUPP;
1468
1469 task = sas_alloc_slow_task(GFP_KERNEL);
1470 if (!task)
1471 return -ENOMEM;
1472
1473 task->dev = device;
1474 task->task_proto = device->tproto;
1475 task->task_done = hisi_sas_task_done;
1476 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1477 task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1478 add_timer(&task->slow_task->timer);
1479
1480 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1481 task, abort_flag, tag);
1482 if (res) {
1483 del_timer(&task->slow_task->timer);
1484 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1485 res);
1486 goto exit;
1487 }
1488 wait_for_completion(&task->slow_task->completion);
1489 res = TMF_RESP_FUNC_FAILED;
1490
1491 /* Internal abort timed out */
1492 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1493 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1494 struct hisi_sas_slot *slot = task->lldd_task;
1495
1496 if (slot)
1497 slot->task = NULL;
1498 dev_err(dev, "internal task abort: timeout.\n");
1499 goto exit;
1500 }
1501 }
1502
1503 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1504 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1505 res = TMF_RESP_FUNC_COMPLETE;
1506 goto exit;
1507 }
1508
1509 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1510 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
1511 res = TMF_RESP_FUNC_SUCC;
1512 goto exit;
1513 }
1514
1515 exit:
1516 dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1517 "resp: 0x%x sts 0x%x\n",
1518 SAS_ADDR(device->sas_addr),
1519 task,
1520 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1521 task->task_status.stat);
1522 sas_free_task(task);
1523
1524 return res;
1525 }
1526
1527 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1528 {
1529 hisi_sas_port_notify_formed(sas_phy);
1530 }
1531
1532 static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
1533 u8 reg_index, u8 reg_count, u8 *write_data)
1534 {
1535 struct hisi_hba *hisi_hba = sha->lldd_ha;
1536
1537 if (!hisi_hba->hw->write_gpio)
1538 return -EOPNOTSUPP;
1539
1540 return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
1541 reg_index, reg_count, write_data);
1542 }
1543
1544 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1545 {
1546 phy->phy_attached = 0;
1547 phy->phy_type = 0;
1548 phy->port = NULL;
1549 }
1550
1551 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1552 {
1553 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1554 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1555 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1556
1557 if (rdy) {
1558 /* Phy down but ready */
1559 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1560 hisi_sas_port_notify_formed(sas_phy);
1561 } else {
1562 struct hisi_sas_port *port = phy->port;
1563
1564 /* Phy down and not ready */
1565 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1566 sas_phy_disconnected(sas_phy);
1567
1568 if (port) {
1569 if (phy->phy_type & PORT_TYPE_SAS) {
1570 int port_id = port->id;
1571
1572 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1573 port_id))
1574 port->port_attached = 0;
1575 } else if (phy->phy_type & PORT_TYPE_SATA)
1576 port->port_attached = 0;
1577 }
1578 hisi_sas_phy_disconnected(phy);
1579 }
1580 }
1581 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1582
1583 void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
1584 {
1585 int i;
1586
1587 for (i = 0; i < hisi_hba->queue_count; i++) {
1588 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1589
1590 tasklet_kill(&cq->tasklet);
1591 }
1592 }
1593 EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
1594
1595 struct scsi_transport_template *hisi_sas_stt;
1596 EXPORT_SYMBOL_GPL(hisi_sas_stt);
1597
1598 struct device_attribute *host_attrs[] = {
1599 &dev_attr_phy_event_threshold,
1600 NULL,
1601 };
1602
1603 static struct scsi_host_template _hisi_sas_sht = {
1604 .module = THIS_MODULE,
1605 .name = DRV_NAME,
1606 .queuecommand = sas_queuecommand,
1607 .target_alloc = sas_target_alloc,
1608 .slave_configure = hisi_sas_slave_configure,
1609 .scan_finished = hisi_sas_scan_finished,
1610 .scan_start = hisi_sas_scan_start,
1611 .change_queue_depth = sas_change_queue_depth,
1612 .bios_param = sas_bios_param,
1613 .can_queue = 1,
1614 .this_id = -1,
1615 .sg_tablesize = SG_ALL,
1616 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1617 .use_clustering = ENABLE_CLUSTERING,
1618 .eh_device_reset_handler = sas_eh_device_reset_handler,
1619 .eh_target_reset_handler = sas_eh_target_reset_handler,
1620 .target_destroy = sas_target_destroy,
1621 .ioctl = sas_ioctl,
1622 .shost_attrs = host_attrs,
1623 };
1624 struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
1625 EXPORT_SYMBOL_GPL(hisi_sas_sht);
1626
1627 static struct sas_domain_function_template hisi_sas_transport_ops = {
1628 .lldd_dev_found = hisi_sas_dev_found,
1629 .lldd_dev_gone = hisi_sas_dev_gone,
1630 .lldd_execute_task = hisi_sas_queue_command,
1631 .lldd_control_phy = hisi_sas_control_phy,
1632 .lldd_abort_task = hisi_sas_abort_task,
1633 .lldd_abort_task_set = hisi_sas_abort_task_set,
1634 .lldd_clear_aca = hisi_sas_clear_aca,
1635 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1636 .lldd_lu_reset = hisi_sas_lu_reset,
1637 .lldd_query_task = hisi_sas_query_task,
1638 .lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
1639 .lldd_port_formed = hisi_sas_port_formed,
1640 .lldd_write_gpio = hisi_sas_write_gpio,
1641 };
1642
1643 void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
1644 {
1645 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1646
1647 for (i = 0; i < hisi_hba->queue_count; i++) {
1648 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1649 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1650
1651 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1652 memset(hisi_hba->cmd_hdr[i], 0, s);
1653 dq->wr_point = 0;
1654
1655 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1656 memset(hisi_hba->complete_hdr[i], 0, s);
1657 cq->rd_point = 0;
1658 }
1659
1660 s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
1661 memset(hisi_hba->initial_fis, 0, s);
1662
1663 s = max_command_entries * sizeof(struct hisi_sas_iost);
1664 memset(hisi_hba->iost, 0, s);
1665
1666 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1667 memset(hisi_hba->breakpoint, 0, s);
1668
1669 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1670 memset(hisi_hba->sata_breakpoint, 0, s);
1671 }
1672 EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
1673
1674 int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1675 {
1676 struct device *dev = hisi_hba->dev;
1677 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1678
1679 spin_lock_init(&hisi_hba->lock);
1680 for (i = 0; i < hisi_hba->n_phy; i++) {
1681 hisi_sas_phy_init(hisi_hba, i);
1682 hisi_hba->port[i].port_attached = 0;
1683 hisi_hba->port[i].id = -1;
1684 }
1685
1686 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1687 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1688 hisi_hba->devices[i].device_id = i;
1689 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1690 }
1691
1692 for (i = 0; i < hisi_hba->queue_count; i++) {
1693 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1694 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1695
1696 /* Completion queue structure */
1697 cq->id = i;
1698 cq->hisi_hba = hisi_hba;
1699
1700 /* Delivery queue structure */
1701 dq->id = i;
1702 dq->hisi_hba = hisi_hba;
1703
1704 /* Delivery queue */
1705 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1706 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1707 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1708 if (!hisi_hba->cmd_hdr[i])
1709 goto err_out;
1710
1711 /* Completion queue */
1712 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1713 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1714 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1715 if (!hisi_hba->complete_hdr[i])
1716 goto err_out;
1717 }
1718
1719 s = sizeof(struct hisi_sas_slot_buf_table);
1720 hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
1721 if (!hisi_hba->buffer_pool)
1722 goto err_out;
1723
1724 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1725 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1726 GFP_KERNEL);
1727 if (!hisi_hba->itct)
1728 goto err_out;
1729
1730 memset(hisi_hba->itct, 0, s);
1731
1732 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1733 sizeof(struct hisi_sas_slot),
1734 GFP_KERNEL);
1735 if (!hisi_hba->slot_info)
1736 goto err_out;
1737
1738 s = max_command_entries * sizeof(struct hisi_sas_iost);
1739 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1740 GFP_KERNEL);
1741 if (!hisi_hba->iost)
1742 goto err_out;
1743
1744 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1745 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1746 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1747 if (!hisi_hba->breakpoint)
1748 goto err_out;
1749
1750 hisi_hba->slot_index_count = max_command_entries;
1751 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1752 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1753 if (!hisi_hba->slot_index_tags)
1754 goto err_out;
1755
1756 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1757 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1758 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1759 if (!hisi_hba->initial_fis)
1760 goto err_out;
1761
1762 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1763 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1764 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1765 if (!hisi_hba->sata_breakpoint)
1766 goto err_out;
1767 hisi_sas_init_mem(hisi_hba);
1768
1769 hisi_sas_slot_index_init(hisi_hba);
1770
1771 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1772 if (!hisi_hba->wq) {
1773 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1774 goto err_out;
1775 }
1776
1777 return 0;
1778 err_out:
1779 return -ENOMEM;
1780 }
1781 EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1782
1783 void hisi_sas_free(struct hisi_hba *hisi_hba)
1784 {
1785 struct device *dev = hisi_hba->dev;
1786 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1787
1788 for (i = 0; i < hisi_hba->queue_count; i++) {
1789 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1790 if (hisi_hba->cmd_hdr[i])
1791 dma_free_coherent(dev, s,
1792 hisi_hba->cmd_hdr[i],
1793 hisi_hba->cmd_hdr_dma[i]);
1794
1795 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1796 if (hisi_hba->complete_hdr[i])
1797 dma_free_coherent(dev, s,
1798 hisi_hba->complete_hdr[i],
1799 hisi_hba->complete_hdr_dma[i]);
1800 }
1801
1802 dma_pool_destroy(hisi_hba->buffer_pool);
1803
1804 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1805 if (hisi_hba->itct)
1806 dma_free_coherent(dev, s,
1807 hisi_hba->itct, hisi_hba->itct_dma);
1808
1809 s = max_command_entries * sizeof(struct hisi_sas_iost);
1810 if (hisi_hba->iost)
1811 dma_free_coherent(dev, s,
1812 hisi_hba->iost, hisi_hba->iost_dma);
1813
1814 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1815 if (hisi_hba->breakpoint)
1816 dma_free_coherent(dev, s,
1817 hisi_hba->breakpoint,
1818 hisi_hba->breakpoint_dma);
1819
1820
1821 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1822 if (hisi_hba->initial_fis)
1823 dma_free_coherent(dev, s,
1824 hisi_hba->initial_fis,
1825 hisi_hba->initial_fis_dma);
1826
1827 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
1828 if (hisi_hba->sata_breakpoint)
1829 dma_free_coherent(dev, s,
1830 hisi_hba->sata_breakpoint,
1831 hisi_hba->sata_breakpoint_dma);
1832
1833 if (hisi_hba->wq)
1834 destroy_workqueue(hisi_hba->wq);
1835 }
1836 EXPORT_SYMBOL_GPL(hisi_sas_free);
1837
1838 void hisi_sas_rst_work_handler(struct work_struct *work)
1839 {
1840 struct hisi_hba *hisi_hba =
1841 container_of(work, struct hisi_hba, rst_work);
1842
1843 hisi_sas_controller_reset(hisi_hba);
1844 }
1845 EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
1846
1847 void hisi_sas_sync_rst_work_handler(struct work_struct *work)
1848 {
1849 struct hisi_sas_rst *rst =
1850 container_of(work, struct hisi_sas_rst, work);
1851
1852 if (!hisi_sas_controller_reset(rst->hisi_hba))
1853 rst->done = true;
1854 complete(rst->completion);
1855 }
1856 EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
1857
1858 int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
1859 {
1860 struct device *dev = hisi_hba->dev;
1861 struct platform_device *pdev = hisi_hba->platform_dev;
1862 struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1863 struct clk *refclk;
1864
1865 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1866 SAS_ADDR_SIZE)) {
1867 dev_err(dev, "could not get property sas-addr\n");
1868 return -ENOENT;
1869 }
1870
1871 if (np) {
1872 /*
1873 * These properties are only required for platform device-based
1874 * controller with DT firmware.
1875 */
1876 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1877 "hisilicon,sas-syscon");
1878 if (IS_ERR(hisi_hba->ctrl)) {
1879 dev_err(dev, "could not get syscon\n");
1880 return -ENOENT;
1881 }
1882
1883 if (device_property_read_u32(dev, "ctrl-reset-reg",
1884 &hisi_hba->ctrl_reset_reg)) {
1885 dev_err(dev,
1886 "could not get property ctrl-reset-reg\n");
1887 return -ENOENT;
1888 }
1889
1890 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1891 &hisi_hba->ctrl_reset_sts_reg)) {
1892 dev_err(dev,
1893 "could not get property ctrl-reset-sts-reg\n");
1894 return -ENOENT;
1895 }
1896
1897 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1898 &hisi_hba->ctrl_clock_ena_reg)) {
1899 dev_err(dev,
1900 "could not get property ctrl-clock-ena-reg\n");
1901 return -ENOENT;
1902 }
1903 }
1904
1905 refclk = devm_clk_get(dev, NULL);
1906 if (IS_ERR(refclk))
1907 dev_dbg(dev, "no ref clk property\n");
1908 else
1909 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1910
1911 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
1912 dev_err(dev, "could not get property phy-count\n");
1913 return -ENOENT;
1914 }
1915
1916 if (device_property_read_u32(dev, "queue-count",
1917 &hisi_hba->queue_count)) {
1918 dev_err(dev, "could not get property queue-count\n");
1919 return -ENOENT;
1920 }
1921
1922 return 0;
1923 }
1924 EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
1925
1926 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1927 const struct hisi_sas_hw *hw)
1928 {
1929 struct resource *res;
1930 struct Scsi_Host *shost;
1931 struct hisi_hba *hisi_hba;
1932 struct device *dev = &pdev->dev;
1933
1934 shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1935 if (!shost) {
1936 dev_err(dev, "scsi host alloc failed\n");
1937 return NULL;
1938 }
1939 hisi_hba = shost_priv(shost);
1940
1941 INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
1942 hisi_hba->hw = hw;
1943 hisi_hba->dev = dev;
1944 hisi_hba->platform_dev = pdev;
1945 hisi_hba->shost = shost;
1946 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1947
1948 timer_setup(&hisi_hba->timer, NULL, 0);
1949
1950 if (hisi_sas_get_fw_info(hisi_hba) < 0)
1951 goto err_out;
1952
1953 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1954 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1955 dev_err(dev, "No usable DMA addressing method\n");
1956 goto err_out;
1957 }
1958
1959 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1960 hisi_hba->regs = devm_ioremap_resource(dev, res);
1961 if (IS_ERR(hisi_hba->regs))
1962 goto err_out;
1963
1964 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1965 if (res) {
1966 hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
1967 if (IS_ERR(hisi_hba->sgpio_regs))
1968 goto err_out;
1969 }
1970
1971 if (hisi_sas_alloc(hisi_hba, shost)) {
1972 hisi_sas_free(hisi_hba);
1973 goto err_out;
1974 }
1975
1976 return shost;
1977 err_out:
1978 scsi_host_put(shost);
1979 dev_err(dev, "shost alloc failed\n");
1980 return NULL;
1981 }
1982
1983 void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1984 {
1985 int i;
1986
1987 for (i = 0; i < hisi_hba->n_phy; i++)
1988 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1989 hisi_hba->sas_addr,
1990 SAS_ADDR_SIZE);
1991 }
1992 EXPORT_SYMBOL_GPL(hisi_sas_init_add);
1993
1994 int hisi_sas_probe(struct platform_device *pdev,
1995 const struct hisi_sas_hw *hw)
1996 {
1997 struct Scsi_Host *shost;
1998 struct hisi_hba *hisi_hba;
1999 struct device *dev = &pdev->dev;
2000 struct asd_sas_phy **arr_phy;
2001 struct asd_sas_port **arr_port;
2002 struct sas_ha_struct *sha;
2003 int rc, phy_nr, port_nr, i;
2004
2005 shost = hisi_sas_shost_alloc(pdev, hw);
2006 if (!shost)
2007 return -ENOMEM;
2008
2009 sha = SHOST_TO_SAS_HA(shost);
2010 hisi_hba = shost_priv(shost);
2011 platform_set_drvdata(pdev, sha);
2012
2013 phy_nr = port_nr = hisi_hba->n_phy;
2014
2015 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
2016 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
2017 if (!arr_phy || !arr_port) {
2018 rc = -ENOMEM;
2019 goto err_out_ha;
2020 }
2021
2022 sha->sas_phy = arr_phy;
2023 sha->sas_port = arr_port;
2024 sha->lldd_ha = hisi_hba;
2025
2026 shost->transportt = hisi_sas_stt;
2027 shost->max_id = HISI_SAS_MAX_DEVICES;
2028 shost->max_lun = ~0;
2029 shost->max_channel = 1;
2030 shost->max_cmd_len = 16;
2031 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
2032 shost->can_queue = hisi_hba->hw->max_command_entries;
2033 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
2034
2035 sha->sas_ha_name = DRV_NAME;
2036 sha->dev = hisi_hba->dev;
2037 sha->lldd_module = THIS_MODULE;
2038 sha->sas_addr = &hisi_hba->sas_addr[0];
2039 sha->num_phys = hisi_hba->n_phy;
2040 sha->core.shost = hisi_hba->shost;
2041
2042 for (i = 0; i < hisi_hba->n_phy; i++) {
2043 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
2044 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
2045 }
2046
2047 hisi_sas_init_add(hisi_hba);
2048
2049 rc = scsi_add_host(shost, &pdev->dev);
2050 if (rc)
2051 goto err_out_ha;
2052
2053 rc = sas_register_ha(sha);
2054 if (rc)
2055 goto err_out_register_ha;
2056
2057 rc = hisi_hba->hw->hw_init(hisi_hba);
2058 if (rc)
2059 goto err_out_register_ha;
2060
2061 scsi_scan_host(shost);
2062
2063 return 0;
2064
2065 err_out_register_ha:
2066 scsi_remove_host(shost);
2067 err_out_ha:
2068 hisi_sas_free(hisi_hba);
2069 scsi_host_put(shost);
2070 return rc;
2071 }
2072 EXPORT_SYMBOL_GPL(hisi_sas_probe);
2073
2074 int hisi_sas_remove(struct platform_device *pdev)
2075 {
2076 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
2077 struct hisi_hba *hisi_hba = sha->lldd_ha;
2078 struct Scsi_Host *shost = sha->core.shost;
2079
2080 sas_unregister_ha(sha);
2081 sas_remove_host(sha->core.shost);
2082
2083 hisi_sas_free(hisi_hba);
2084 scsi_host_put(shost);
2085 return 0;
2086 }
2087 EXPORT_SYMBOL_GPL(hisi_sas_remove);
2088
2089 static __init int hisi_sas_init(void)
2090 {
2091 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
2092 if (!hisi_sas_stt)
2093 return -ENOMEM;
2094
2095 return 0;
2096 }
2097
2098 static __exit void hisi_sas_exit(void)
2099 {
2100 sas_release_transport(hisi_sas_stt);
2101 }
2102
2103 module_init(hisi_sas_init);
2104 module_exit(hisi_sas_exit);
2105
2106 MODULE_LICENSE("GPL");
2107 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
2108 MODULE_DESCRIPTION("HISILICON SAS controller driver");
2109 MODULE_ALIAS("platform:" DRV_NAME);
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