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