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[mirror_ubuntu-artful-kernel.git] / drivers / scsi / hisi_sas / hisi_sas_main.c
1 /*
2 * Copyright (c) 2015 Linaro Ltd.
3 * Copyright (c) 2015 Hisilicon Limited.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 */
11
12 #include "hisi_sas.h"
13 #define DRV_NAME "hisi_sas"
14
15 #define DEV_IS_GONE(dev) \
16 ((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
17
18 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
19 u8 *lun, struct hisi_sas_tmf_task *tmf);
20 static int
21 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
22 struct domain_device *device,
23 int abort_flag, int tag);
24
25 static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
26 {
27 return device->port->ha->lldd_ha;
28 }
29
30 static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
31 {
32 void *bitmap = hisi_hba->slot_index_tags;
33
34 clear_bit(slot_idx, bitmap);
35 }
36
37 static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
38 {
39 hisi_sas_slot_index_clear(hisi_hba, slot_idx);
40 }
41
42 static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
43 {
44 void *bitmap = hisi_hba->slot_index_tags;
45
46 set_bit(slot_idx, bitmap);
47 }
48
49 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
50 {
51 unsigned int index;
52 void *bitmap = hisi_hba->slot_index_tags;
53
54 index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
55 if (index >= hisi_hba->slot_index_count)
56 return -SAS_QUEUE_FULL;
57 hisi_sas_slot_index_set(hisi_hba, index);
58 *slot_idx = index;
59 return 0;
60 }
61
62 static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
63 {
64 int i;
65
66 for (i = 0; i < hisi_hba->slot_index_count; ++i)
67 hisi_sas_slot_index_clear(hisi_hba, i);
68 }
69
70 void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
71 struct hisi_sas_slot *slot)
72 {
73 struct device *dev = &hisi_hba->pdev->dev;
74
75 if (!slot->task)
76 return;
77
78 if (!sas_protocol_ata(task->task_proto))
79 if (slot->n_elem)
80 dma_unmap_sg(dev, task->scatter, slot->n_elem,
81 task->data_dir);
82
83 if (slot->command_table)
84 dma_pool_free(hisi_hba->command_table_pool,
85 slot->command_table, slot->command_table_dma);
86
87 if (slot->status_buffer)
88 dma_pool_free(hisi_hba->status_buffer_pool,
89 slot->status_buffer, slot->status_buffer_dma);
90
91 if (slot->sge_page)
92 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
93 slot->sge_page_dma);
94
95 list_del_init(&slot->entry);
96 task->lldd_task = NULL;
97 slot->task = NULL;
98 slot->port = NULL;
99 hisi_sas_slot_index_free(hisi_hba, slot->idx);
100 /* slot memory is fully zeroed when it is reused */
101 }
102 EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
103
104 static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
105 struct hisi_sas_slot *slot)
106 {
107 return hisi_hba->hw->prep_smp(hisi_hba, slot);
108 }
109
110 static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
111 struct hisi_sas_slot *slot, int is_tmf,
112 struct hisi_sas_tmf_task *tmf)
113 {
114 return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
115 }
116
117 static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
118 struct hisi_sas_slot *slot)
119 {
120 return hisi_hba->hw->prep_stp(hisi_hba, slot);
121 }
122
123 static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
124 struct hisi_sas_slot *slot,
125 int device_id, int abort_flag, int tag_to_abort)
126 {
127 return hisi_hba->hw->prep_abort(hisi_hba, slot,
128 device_id, abort_flag, tag_to_abort);
129 }
130
131 /*
132 * This function will issue an abort TMF regardless of whether the
133 * task is in the sdev or not. Then it will do the task complete
134 * cleanup and callbacks.
135 */
136 static void hisi_sas_slot_abort(struct work_struct *work)
137 {
138 struct hisi_sas_slot *abort_slot =
139 container_of(work, struct hisi_sas_slot, abort_slot);
140 struct sas_task *task = abort_slot->task;
141 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
142 struct scsi_cmnd *cmnd = task->uldd_task;
143 struct hisi_sas_tmf_task tmf_task;
144 struct domain_device *device = task->dev;
145 struct hisi_sas_device *sas_dev = device->lldd_dev;
146 struct scsi_lun lun;
147 struct device *dev = &hisi_hba->pdev->dev;
148 int tag = abort_slot->idx;
149
150 if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
151 dev_err(dev, "cannot abort slot for non-ssp task\n");
152 goto out;
153 }
154
155 int_to_scsilun(cmnd->device->lun, &lun);
156 tmf_task.tmf = TMF_ABORT_TASK;
157 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
158
159 hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
160 out:
161 /* Do cleanup for this task */
162 hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
163 if (task->task_done)
164 task->task_done(task);
165 if (sas_dev)
166 atomic64_dec(&sas_dev->running_req);
167 }
168
169 static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
170 int is_tmf, struct hisi_sas_tmf_task *tmf,
171 int *pass)
172 {
173 struct domain_device *device = task->dev;
174 struct hisi_sas_device *sas_dev = device->lldd_dev;
175 struct hisi_sas_port *port;
176 struct hisi_sas_slot *slot;
177 struct hisi_sas_cmd_hdr *cmd_hdr_base;
178 struct device *dev = &hisi_hba->pdev->dev;
179 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
180
181 if (!device->port) {
182 struct task_status_struct *ts = &task->task_status;
183
184 ts->resp = SAS_TASK_UNDELIVERED;
185 ts->stat = SAS_PHY_DOWN;
186 /*
187 * libsas will use dev->port, should
188 * not call task_done for sata
189 */
190 if (device->dev_type != SAS_SATA_DEV)
191 task->task_done(task);
192 return 0;
193 }
194
195 if (DEV_IS_GONE(sas_dev)) {
196 if (sas_dev)
197 dev_info(dev, "task prep: device %llu not ready\n",
198 sas_dev->device_id);
199 else
200 dev_info(dev, "task prep: device %016llx not ready\n",
201 SAS_ADDR(device->sas_addr));
202
203 rc = SAS_PHY_DOWN;
204 return rc;
205 }
206 port = device->port->lldd_port;
207 if (port && !port->port_attached) {
208 dev_info(dev, "task prep: %s port%d not attach device\n",
209 (sas_protocol_ata(task->task_proto)) ?
210 "SATA/STP" : "SAS",
211 device->port->id);
212
213 return SAS_PHY_DOWN;
214 }
215
216 if (!sas_protocol_ata(task->task_proto)) {
217 if (task->num_scatter) {
218 n_elem = dma_map_sg(dev, task->scatter,
219 task->num_scatter, task->data_dir);
220 if (!n_elem) {
221 rc = -ENOMEM;
222 goto prep_out;
223 }
224 }
225 } else
226 n_elem = task->num_scatter;
227
228 if (hisi_hba->hw->slot_index_alloc)
229 rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
230 device);
231 else
232 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
233 if (rc)
234 goto err_out;
235 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
236 &dlvry_queue, &dlvry_queue_slot);
237 if (rc)
238 goto err_out_tag;
239
240 slot = &hisi_hba->slot_info[slot_idx];
241 memset(slot, 0, sizeof(struct hisi_sas_slot));
242
243 slot->idx = slot_idx;
244 slot->n_elem = n_elem;
245 slot->dlvry_queue = dlvry_queue;
246 slot->dlvry_queue_slot = dlvry_queue_slot;
247 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
248 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
249 slot->task = task;
250 slot->port = port;
251 task->lldd_task = slot;
252 INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
253
254 slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
255 GFP_ATOMIC,
256 &slot->status_buffer_dma);
257 if (!slot->status_buffer) {
258 rc = -ENOMEM;
259 goto err_out_slot_buf;
260 }
261 memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);
262
263 slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
264 GFP_ATOMIC,
265 &slot->command_table_dma);
266 if (!slot->command_table) {
267 rc = -ENOMEM;
268 goto err_out_status_buf;
269 }
270 memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
271 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
272
273 switch (task->task_proto) {
274 case SAS_PROTOCOL_SMP:
275 rc = hisi_sas_task_prep_smp(hisi_hba, slot);
276 break;
277 case SAS_PROTOCOL_SSP:
278 rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
279 break;
280 case SAS_PROTOCOL_SATA:
281 case SAS_PROTOCOL_STP:
282 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
283 rc = hisi_sas_task_prep_ata(hisi_hba, slot);
284 break;
285 default:
286 dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
287 task->task_proto);
288 rc = -EINVAL;
289 break;
290 }
291
292 if (rc) {
293 dev_err(dev, "task prep: rc = 0x%x\n", rc);
294 if (slot->sge_page)
295 goto err_out_sge;
296 goto err_out_command_table;
297 }
298
299 list_add_tail(&slot->entry, &port->list);
300 spin_lock(&task->task_state_lock);
301 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
302 spin_unlock(&task->task_state_lock);
303
304 hisi_hba->slot_prep = slot;
305
306 atomic64_inc(&sas_dev->running_req);
307 ++(*pass);
308
309 return 0;
310
311 err_out_sge:
312 dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
313 slot->sge_page_dma);
314 err_out_command_table:
315 dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
316 slot->command_table_dma);
317 err_out_status_buf:
318 dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
319 slot->status_buffer_dma);
320 err_out_slot_buf:
321 /* Nothing to be done */
322 err_out_tag:
323 hisi_sas_slot_index_free(hisi_hba, slot_idx);
324 err_out:
325 dev_err(dev, "task prep: failed[%d]!\n", rc);
326 if (!sas_protocol_ata(task->task_proto))
327 if (n_elem)
328 dma_unmap_sg(dev, task->scatter, n_elem,
329 task->data_dir);
330 prep_out:
331 return rc;
332 }
333
334 static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
335 int is_tmf, struct hisi_sas_tmf_task *tmf)
336 {
337 u32 rc;
338 u32 pass = 0;
339 unsigned long flags;
340 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
341 struct device *dev = &hisi_hba->pdev->dev;
342
343 /* protect task_prep and start_delivery sequence */
344 spin_lock_irqsave(&hisi_hba->lock, flags);
345 rc = hisi_sas_task_prep(task, hisi_hba, is_tmf, tmf, &pass);
346 if (rc)
347 dev_err(dev, "task exec: failed[%d]!\n", rc);
348
349 if (likely(pass))
350 hisi_hba->hw->start_delivery(hisi_hba);
351 spin_unlock_irqrestore(&hisi_hba->lock, flags);
352
353 return rc;
354 }
355
356 static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
357 {
358 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
359 struct asd_sas_phy *sas_phy = &phy->sas_phy;
360 struct sas_ha_struct *sas_ha;
361
362 if (!phy->phy_attached)
363 return;
364
365 sas_ha = &hisi_hba->sha;
366 sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
367
368 if (sas_phy->phy) {
369 struct sas_phy *sphy = sas_phy->phy;
370
371 sphy->negotiated_linkrate = sas_phy->linkrate;
372 sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
373 sphy->maximum_linkrate_hw =
374 hisi_hba->hw->phy_get_max_linkrate();
375 if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
376 sphy->minimum_linkrate = phy->minimum_linkrate;
377
378 if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
379 sphy->maximum_linkrate = phy->maximum_linkrate;
380 }
381
382 if (phy->phy_type & PORT_TYPE_SAS) {
383 struct sas_identify_frame *id;
384
385 id = (struct sas_identify_frame *)phy->frame_rcvd;
386 id->dev_type = phy->identify.device_type;
387 id->initiator_bits = SAS_PROTOCOL_ALL;
388 id->target_bits = phy->identify.target_port_protocols;
389 } else if (phy->phy_type & PORT_TYPE_SATA) {
390 /*Nothing*/
391 }
392
393 sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
394 sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
395 }
396
397 static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
398 {
399 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
400 struct hisi_sas_device *sas_dev = NULL;
401 int i;
402
403 spin_lock(&hisi_hba->lock);
404 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
405 if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
406 hisi_hba->devices[i].device_id = i;
407 sas_dev = &hisi_hba->devices[i];
408 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
409 sas_dev->dev_type = device->dev_type;
410 sas_dev->hisi_hba = hisi_hba;
411 sas_dev->sas_device = device;
412 break;
413 }
414 }
415 spin_unlock(&hisi_hba->lock);
416
417 return sas_dev;
418 }
419
420 static int hisi_sas_dev_found(struct domain_device *device)
421 {
422 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
423 struct domain_device *parent_dev = device->parent;
424 struct hisi_sas_device *sas_dev;
425 struct device *dev = &hisi_hba->pdev->dev;
426
427 if (hisi_hba->hw->alloc_dev)
428 sas_dev = hisi_hba->hw->alloc_dev(device);
429 else
430 sas_dev = hisi_sas_alloc_dev(device);
431 if (!sas_dev) {
432 dev_err(dev, "fail alloc dev: max support %d devices\n",
433 HISI_SAS_MAX_DEVICES);
434 return -EINVAL;
435 }
436
437 device->lldd_dev = sas_dev;
438 hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
439
440 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
441 int phy_no;
442 u8 phy_num = parent_dev->ex_dev.num_phys;
443 struct ex_phy *phy;
444
445 for (phy_no = 0; phy_no < phy_num; phy_no++) {
446 phy = &parent_dev->ex_dev.ex_phy[phy_no];
447 if (SAS_ADDR(phy->attached_sas_addr) ==
448 SAS_ADDR(device->sas_addr)) {
449 sas_dev->attached_phy = phy_no;
450 break;
451 }
452 }
453
454 if (phy_no == phy_num) {
455 dev_info(dev, "dev found: no attached "
456 "dev:%016llx at ex:%016llx\n",
457 SAS_ADDR(device->sas_addr),
458 SAS_ADDR(parent_dev->sas_addr));
459 return -EINVAL;
460 }
461 }
462
463 return 0;
464 }
465
466 static int hisi_sas_slave_configure(struct scsi_device *sdev)
467 {
468 struct domain_device *dev = sdev_to_domain_dev(sdev);
469 int ret = sas_slave_configure(sdev);
470
471 if (ret)
472 return ret;
473 if (!dev_is_sata(dev))
474 sas_change_queue_depth(sdev, 64);
475
476 return 0;
477 }
478
479 static void hisi_sas_scan_start(struct Scsi_Host *shost)
480 {
481 struct hisi_hba *hisi_hba = shost_priv(shost);
482 int i;
483
484 for (i = 0; i < hisi_hba->n_phy; ++i)
485 hisi_sas_bytes_dmaed(hisi_hba, i);
486
487 hisi_hba->scan_finished = 1;
488 }
489
490 static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
491 {
492 struct hisi_hba *hisi_hba = shost_priv(shost);
493 struct sas_ha_struct *sha = &hisi_hba->sha;
494
495 if (hisi_hba->scan_finished == 0)
496 return 0;
497
498 sas_drain_work(sha);
499 return 1;
500 }
501
502 static void hisi_sas_phyup_work(struct work_struct *work)
503 {
504 struct hisi_sas_phy *phy =
505 container_of(work, struct hisi_sas_phy, phyup_ws);
506 struct hisi_hba *hisi_hba = phy->hisi_hba;
507 struct asd_sas_phy *sas_phy = &phy->sas_phy;
508 int phy_no = sas_phy->id;
509
510 hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
511 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
512 }
513
514 static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
515 {
516 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
517 struct asd_sas_phy *sas_phy = &phy->sas_phy;
518
519 phy->hisi_hba = hisi_hba;
520 phy->port = NULL;
521 init_timer(&phy->timer);
522 sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
523 sas_phy->class = SAS;
524 sas_phy->iproto = SAS_PROTOCOL_ALL;
525 sas_phy->tproto = 0;
526 sas_phy->type = PHY_TYPE_PHYSICAL;
527 sas_phy->role = PHY_ROLE_INITIATOR;
528 sas_phy->oob_mode = OOB_NOT_CONNECTED;
529 sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
530 sas_phy->id = phy_no;
531 sas_phy->sas_addr = &hisi_hba->sas_addr[0];
532 sas_phy->frame_rcvd = &phy->frame_rcvd[0];
533 sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
534 sas_phy->lldd_phy = phy;
535
536 INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
537 }
538
539 static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
540 {
541 struct sas_ha_struct *sas_ha = sas_phy->ha;
542 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
543 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
544 struct asd_sas_port *sas_port = sas_phy->port;
545 struct hisi_sas_port *port = &hisi_hba->port[phy->port_id];
546 unsigned long flags;
547
548 if (!sas_port)
549 return;
550
551 spin_lock_irqsave(&hisi_hba->lock, flags);
552 port->port_attached = 1;
553 port->id = phy->port_id;
554 phy->port = port;
555 sas_port->lldd_port = port;
556 spin_unlock_irqrestore(&hisi_hba->lock, flags);
557 }
558
559 static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
560 struct domain_device *device)
561 {
562 struct hisi_sas_phy *phy;
563 struct hisi_sas_port *port;
564 struct hisi_sas_slot *slot, *slot2;
565 struct device *dev = &hisi_hba->pdev->dev;
566
567 phy = &hisi_hba->phy[phy_no];
568 port = phy->port;
569 if (!port)
570 return;
571
572 list_for_each_entry_safe(slot, slot2, &port->list, entry) {
573 struct sas_task *task;
574
575 task = slot->task;
576 if (device && task->dev != device)
577 continue;
578
579 dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
580 slot->dlvry_queue, slot->dlvry_queue_slot, task);
581 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
582 }
583 }
584
585 static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
586 {
587 struct domain_device *device;
588 struct hisi_sas_phy *phy = sas_phy->lldd_phy;
589 struct asd_sas_port *sas_port = sas_phy->port;
590
591 list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
592 hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
593 }
594
595 static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
596 struct domain_device *device)
597 {
598 struct asd_sas_port *port = device->port;
599 struct asd_sas_phy *sas_phy;
600
601 list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
602 hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
603 }
604
605 static void hisi_sas_dev_gone(struct domain_device *device)
606 {
607 struct hisi_sas_device *sas_dev = device->lldd_dev;
608 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
609 struct device *dev = &hisi_hba->pdev->dev;
610 u64 dev_id = sas_dev->device_id;
611
612 dev_info(dev, "found dev[%lld:%x] is gone\n",
613 sas_dev->device_id, sas_dev->dev_type);
614
615 hisi_sas_internal_task_abort(hisi_hba, device,
616 HISI_SAS_INT_ABT_DEV, 0);
617
618 hisi_hba->hw->free_device(hisi_hba, sas_dev);
619 device->lldd_dev = NULL;
620 memset(sas_dev, 0, sizeof(*sas_dev));
621 sas_dev->device_id = dev_id;
622 sas_dev->dev_type = SAS_PHY_UNUSED;
623 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
624 }
625
626 static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
627 {
628 return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
629 }
630
631 static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
632 void *funcdata)
633 {
634 struct sas_ha_struct *sas_ha = sas_phy->ha;
635 struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
636 int phy_no = sas_phy->id;
637
638 switch (func) {
639 case PHY_FUNC_HARD_RESET:
640 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
641 break;
642
643 case PHY_FUNC_LINK_RESET:
644 hisi_hba->hw->phy_enable(hisi_hba, phy_no);
645 hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
646 break;
647
648 case PHY_FUNC_DISABLE:
649 hisi_hba->hw->phy_disable(hisi_hba, phy_no);
650 break;
651
652 case PHY_FUNC_SET_LINK_RATE:
653 hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
654 break;
655
656 case PHY_FUNC_RELEASE_SPINUP_HOLD:
657 default:
658 return -EOPNOTSUPP;
659 }
660 return 0;
661 }
662
663 static void hisi_sas_task_done(struct sas_task *task)
664 {
665 if (!del_timer(&task->slow_task->timer))
666 return;
667 complete(&task->slow_task->completion);
668 }
669
670 static void hisi_sas_tmf_timedout(unsigned long data)
671 {
672 struct sas_task *task = (struct sas_task *)data;
673
674 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
675 complete(&task->slow_task->completion);
676 }
677
678 #define TASK_TIMEOUT 20
679 #define TASK_RETRY 3
680 static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
681 void *parameter, u32 para_len,
682 struct hisi_sas_tmf_task *tmf)
683 {
684 struct hisi_sas_device *sas_dev = device->lldd_dev;
685 struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
686 struct device *dev = &hisi_hba->pdev->dev;
687 struct sas_task *task;
688 int res, retry;
689
690 for (retry = 0; retry < TASK_RETRY; retry++) {
691 task = sas_alloc_slow_task(GFP_KERNEL);
692 if (!task)
693 return -ENOMEM;
694
695 task->dev = device;
696 task->task_proto = device->tproto;
697
698 memcpy(&task->ssp_task, parameter, para_len);
699 task->task_done = hisi_sas_task_done;
700
701 task->slow_task->timer.data = (unsigned long) task;
702 task->slow_task->timer.function = hisi_sas_tmf_timedout;
703 task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
704 add_timer(&task->slow_task->timer);
705
706 res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
707
708 if (res) {
709 del_timer(&task->slow_task->timer);
710 dev_err(dev, "abort tmf: executing internal task failed: %d\n",
711 res);
712 goto ex_err;
713 }
714
715 wait_for_completion(&task->slow_task->completion);
716 res = TMF_RESP_FUNC_FAILED;
717 /* Even TMF timed out, return direct. */
718 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
719 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
720 dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
721 tmf->tag_of_task_to_be_managed);
722 if (task->lldd_task) {
723 struct hisi_sas_slot *slot =
724 task->lldd_task;
725
726 hisi_sas_slot_task_free(hisi_hba,
727 task, slot);
728 }
729
730 goto ex_err;
731 }
732 }
733
734 if (task->task_status.resp == SAS_TASK_COMPLETE &&
735 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
736 res = TMF_RESP_FUNC_COMPLETE;
737 break;
738 }
739
740 if (task->task_status.resp == SAS_TASK_COMPLETE &&
741 task->task_status.stat == TMF_RESP_FUNC_SUCC) {
742 res = TMF_RESP_FUNC_SUCC;
743 break;
744 }
745
746 if (task->task_status.resp == SAS_TASK_COMPLETE &&
747 task->task_status.stat == SAS_DATA_UNDERRUN) {
748 /* no error, but return the number of bytes of
749 * underrun
750 */
751 dev_warn(dev, "abort tmf: task to dev %016llx "
752 "resp: 0x%x sts 0x%x underrun\n",
753 SAS_ADDR(device->sas_addr),
754 task->task_status.resp,
755 task->task_status.stat);
756 res = task->task_status.residual;
757 break;
758 }
759
760 if (task->task_status.resp == SAS_TASK_COMPLETE &&
761 task->task_status.stat == SAS_DATA_OVERRUN) {
762 dev_warn(dev, "abort tmf: blocked task error\n");
763 res = -EMSGSIZE;
764 break;
765 }
766
767 dev_warn(dev, "abort tmf: task to dev "
768 "%016llx resp: 0x%x status 0x%x\n",
769 SAS_ADDR(device->sas_addr), task->task_status.resp,
770 task->task_status.stat);
771 sas_free_task(task);
772 task = NULL;
773 }
774 ex_err:
775 if (retry == TASK_RETRY)
776 dev_warn(dev, "abort tmf: executing internal task failed!\n");
777 sas_free_task(task);
778 return res;
779 }
780
781 static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
782 u8 *lun, struct hisi_sas_tmf_task *tmf)
783 {
784 struct sas_ssp_task ssp_task;
785
786 if (!(device->tproto & SAS_PROTOCOL_SSP))
787 return TMF_RESP_FUNC_ESUPP;
788
789 memcpy(ssp_task.LUN, lun, 8);
790
791 return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
792 sizeof(ssp_task), tmf);
793 }
794
795 static int hisi_sas_abort_task(struct sas_task *task)
796 {
797 struct scsi_lun lun;
798 struct hisi_sas_tmf_task tmf_task;
799 struct domain_device *device = task->dev;
800 struct hisi_sas_device *sas_dev = device->lldd_dev;
801 struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
802 struct device *dev = &hisi_hba->pdev->dev;
803 int rc = TMF_RESP_FUNC_FAILED;
804 unsigned long flags;
805
806 if (!sas_dev) {
807 dev_warn(dev, "Device has been removed\n");
808 return TMF_RESP_FUNC_FAILED;
809 }
810
811 spin_lock_irqsave(&task->task_state_lock, flags);
812 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
813 spin_unlock_irqrestore(&task->task_state_lock, flags);
814 rc = TMF_RESP_FUNC_COMPLETE;
815 goto out;
816 }
817
818 spin_unlock_irqrestore(&task->task_state_lock, flags);
819 sas_dev->dev_status = HISI_SAS_DEV_EH;
820 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
821 struct scsi_cmnd *cmnd = task->uldd_task;
822 struct hisi_sas_slot *slot = task->lldd_task;
823 u32 tag = slot->idx;
824
825 int_to_scsilun(cmnd->device->lun, &lun);
826 tmf_task.tmf = TMF_ABORT_TASK;
827 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
828
829 rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
830 &tmf_task);
831
832 /* if successful, clear the task and callback forwards.*/
833 if (rc == TMF_RESP_FUNC_COMPLETE) {
834 if (task->lldd_task) {
835 struct hisi_sas_slot *slot;
836
837 slot = &hisi_hba->slot_info
838 [tmf_task.tag_of_task_to_be_managed];
839 spin_lock_irqsave(&hisi_hba->lock, flags);
840 hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
841 spin_unlock_irqrestore(&hisi_hba->lock, flags);
842 }
843 }
844
845 hisi_sas_internal_task_abort(hisi_hba, device,
846 HISI_SAS_INT_ABT_CMD, tag);
847 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
848 task->task_proto & SAS_PROTOCOL_STP) {
849 if (task->dev->dev_type == SAS_SATA_DEV) {
850 hisi_sas_internal_task_abort(hisi_hba, device,
851 HISI_SAS_INT_ABT_DEV, 0);
852 rc = TMF_RESP_FUNC_COMPLETE;
853 }
854 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
855 /* SMP */
856 struct hisi_sas_slot *slot = task->lldd_task;
857 u32 tag = slot->idx;
858
859 hisi_sas_internal_task_abort(hisi_hba, device,
860 HISI_SAS_INT_ABT_CMD, tag);
861 }
862
863 out:
864 if (rc != TMF_RESP_FUNC_COMPLETE)
865 dev_notice(dev, "abort task: rc=%d\n", rc);
866 return rc;
867 }
868
869 static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
870 {
871 struct hisi_sas_tmf_task tmf_task;
872 int rc = TMF_RESP_FUNC_FAILED;
873
874 tmf_task.tmf = TMF_ABORT_TASK_SET;
875 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
876
877 return rc;
878 }
879
880 static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
881 {
882 int rc = TMF_RESP_FUNC_FAILED;
883 struct hisi_sas_tmf_task tmf_task;
884
885 tmf_task.tmf = TMF_CLEAR_ACA;
886 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
887
888 return rc;
889 }
890
891 static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
892 {
893 struct sas_phy *phy = sas_get_local_phy(device);
894 int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
895 (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
896 rc = sas_phy_reset(phy, reset_type);
897 sas_put_local_phy(phy);
898 msleep(2000);
899 return rc;
900 }
901
902 static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
903 {
904 struct hisi_sas_device *sas_dev = device->lldd_dev;
905 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
906 unsigned long flags;
907 int rc = TMF_RESP_FUNC_FAILED;
908
909 if (sas_dev->dev_status != HISI_SAS_DEV_EH)
910 return TMF_RESP_FUNC_FAILED;
911 sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
912
913 rc = hisi_sas_debug_I_T_nexus_reset(device);
914
915 spin_lock_irqsave(&hisi_hba->lock, flags);
916 hisi_sas_release_task(hisi_hba, device);
917 spin_unlock_irqrestore(&hisi_hba->lock, flags);
918
919 return 0;
920 }
921
922 static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
923 {
924 struct hisi_sas_tmf_task tmf_task;
925 struct hisi_sas_device *sas_dev = device->lldd_dev;
926 struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
927 struct device *dev = &hisi_hba->pdev->dev;
928 unsigned long flags;
929 int rc = TMF_RESP_FUNC_FAILED;
930
931 tmf_task.tmf = TMF_LU_RESET;
932 sas_dev->dev_status = HISI_SAS_DEV_EH;
933 rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
934 if (rc == TMF_RESP_FUNC_COMPLETE) {
935 spin_lock_irqsave(&hisi_hba->lock, flags);
936 hisi_sas_release_task(hisi_hba, device);
937 spin_unlock_irqrestore(&hisi_hba->lock, flags);
938 }
939
940 /* If failed, fall-through I_T_Nexus reset */
941 dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
942 sas_dev->device_id, rc);
943 return rc;
944 }
945
946 static int hisi_sas_query_task(struct sas_task *task)
947 {
948 struct scsi_lun lun;
949 struct hisi_sas_tmf_task tmf_task;
950 int rc = TMF_RESP_FUNC_FAILED;
951
952 if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
953 struct scsi_cmnd *cmnd = task->uldd_task;
954 struct domain_device *device = task->dev;
955 struct hisi_sas_slot *slot = task->lldd_task;
956 u32 tag = slot->idx;
957
958 int_to_scsilun(cmnd->device->lun, &lun);
959 tmf_task.tmf = TMF_QUERY_TASK;
960 tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
961
962 rc = hisi_sas_debug_issue_ssp_tmf(device,
963 lun.scsi_lun,
964 &tmf_task);
965 switch (rc) {
966 /* The task is still in Lun, release it then */
967 case TMF_RESP_FUNC_SUCC:
968 /* The task is not in Lun or failed, reset the phy */
969 case TMF_RESP_FUNC_FAILED:
970 case TMF_RESP_FUNC_COMPLETE:
971 break;
972 default:
973 rc = TMF_RESP_FUNC_FAILED;
974 break;
975 }
976 }
977 return rc;
978 }
979
980 static int
981 hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, u64 device_id,
982 struct sas_task *task, int abort_flag,
983 int task_tag)
984 {
985 struct domain_device *device = task->dev;
986 struct hisi_sas_device *sas_dev = device->lldd_dev;
987 struct device *dev = &hisi_hba->pdev->dev;
988 struct hisi_sas_port *port;
989 struct hisi_sas_slot *slot;
990 struct hisi_sas_cmd_hdr *cmd_hdr_base;
991 int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
992
993 if (!device->port)
994 return -1;
995
996 port = device->port->lldd_port;
997
998 /* simply get a slot and send abort command */
999 rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1000 if (rc)
1001 goto err_out;
1002 rc = hisi_hba->hw->get_free_slot(hisi_hba, sas_dev->device_id,
1003 &dlvry_queue, &dlvry_queue_slot);
1004 if (rc)
1005 goto err_out_tag;
1006
1007 slot = &hisi_hba->slot_info[slot_idx];
1008 memset(slot, 0, sizeof(struct hisi_sas_slot));
1009
1010 slot->idx = slot_idx;
1011 slot->n_elem = n_elem;
1012 slot->dlvry_queue = dlvry_queue;
1013 slot->dlvry_queue_slot = dlvry_queue_slot;
1014 cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
1015 slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
1016 slot->task = task;
1017 slot->port = port;
1018 task->lldd_task = slot;
1019
1020 memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1021
1022 rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1023 abort_flag, task_tag);
1024 if (rc)
1025 goto err_out_tag;
1026
1027 /* Port structure is static for the HBA, so
1028 * even if the port is deformed it is ok
1029 * to reference.
1030 */
1031 list_add_tail(&slot->entry, &port->list);
1032 spin_lock(&task->task_state_lock);
1033 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1034 spin_unlock(&task->task_state_lock);
1035
1036 hisi_hba->slot_prep = slot;
1037
1038 atomic64_inc(&sas_dev->running_req);
1039
1040 /* send abort command to our chip */
1041 hisi_hba->hw->start_delivery(hisi_hba);
1042
1043 return 0;
1044
1045 err_out_tag:
1046 hisi_sas_slot_index_free(hisi_hba, slot_idx);
1047 err_out:
1048 dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
1049
1050 return rc;
1051 }
1052
1053 /**
1054 * hisi_sas_internal_task_abort -- execute an internal
1055 * abort command for single IO command or a device
1056 * @hisi_hba: host controller struct
1057 * @device: domain device
1058 * @abort_flag: mode of operation, device or single IO
1059 * @tag: tag of IO to be aborted (only relevant to single
1060 * IO mode)
1061 */
1062 static int
1063 hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
1064 struct domain_device *device,
1065 int abort_flag, int tag)
1066 {
1067 struct sas_task *task;
1068 struct hisi_sas_device *sas_dev = device->lldd_dev;
1069 struct device *dev = &hisi_hba->pdev->dev;
1070 int res;
1071 unsigned long flags;
1072
1073 if (!hisi_hba->hw->prep_abort)
1074 return -EOPNOTSUPP;
1075
1076 task = sas_alloc_slow_task(GFP_KERNEL);
1077 if (!task)
1078 return -ENOMEM;
1079
1080 task->dev = device;
1081 task->task_proto = device->tproto;
1082 task->task_done = hisi_sas_task_done;
1083 task->slow_task->timer.data = (unsigned long)task;
1084 task->slow_task->timer.function = hisi_sas_tmf_timedout;
1085 task->slow_task->timer.expires = jiffies + 20*HZ;
1086 add_timer(&task->slow_task->timer);
1087
1088 /* Lock as we are alloc'ing a slot, which cannot be interrupted */
1089 spin_lock_irqsave(&hisi_hba->lock, flags);
1090 res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
1091 task, abort_flag, tag);
1092 spin_unlock_irqrestore(&hisi_hba->lock, flags);
1093 if (res) {
1094 del_timer(&task->slow_task->timer);
1095 dev_err(dev, "internal task abort: executing internal task failed: %d\n",
1096 res);
1097 goto exit;
1098 }
1099 wait_for_completion(&task->slow_task->completion);
1100 res = TMF_RESP_FUNC_FAILED;
1101
1102 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1103 task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
1104 res = TMF_RESP_FUNC_COMPLETE;
1105 goto exit;
1106 }
1107
1108 /* TMF timed out, return direct. */
1109 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
1110 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1111 dev_err(dev, "internal task abort: timeout.\n");
1112 if (task->lldd_task) {
1113 struct hisi_sas_slot *slot = task->lldd_task;
1114
1115 hisi_sas_slot_task_free(hisi_hba, task, slot);
1116 }
1117 }
1118 }
1119
1120 exit:
1121 dev_info(dev, "internal task abort: task to dev %016llx task=%p "
1122 "resp: 0x%x sts 0x%x\n",
1123 SAS_ADDR(device->sas_addr),
1124 task,
1125 task->task_status.resp, /* 0 is complete, -1 is undelivered */
1126 task->task_status.stat);
1127 sas_free_task(task);
1128
1129 return res;
1130 }
1131
1132 static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
1133 {
1134 hisi_sas_port_notify_formed(sas_phy);
1135 }
1136
1137 static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
1138 {
1139 hisi_sas_port_notify_deformed(sas_phy);
1140 }
1141
1142 static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
1143 {
1144 phy->phy_attached = 0;
1145 phy->phy_type = 0;
1146 phy->port = NULL;
1147 }
1148
1149 void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
1150 {
1151 struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
1152 struct asd_sas_phy *sas_phy = &phy->sas_phy;
1153 struct sas_ha_struct *sas_ha = &hisi_hba->sha;
1154
1155 if (rdy) {
1156 /* Phy down but ready */
1157 hisi_sas_bytes_dmaed(hisi_hba, phy_no);
1158 hisi_sas_port_notify_formed(sas_phy);
1159 } else {
1160 struct hisi_sas_port *port = phy->port;
1161
1162 /* Phy down and not ready */
1163 sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
1164 sas_phy_disconnected(sas_phy);
1165
1166 if (port) {
1167 if (phy->phy_type & PORT_TYPE_SAS) {
1168 int port_id = port->id;
1169
1170 if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
1171 port_id))
1172 port->port_attached = 0;
1173 } else if (phy->phy_type & PORT_TYPE_SATA)
1174 port->port_attached = 0;
1175 }
1176 hisi_sas_phy_disconnected(phy);
1177 }
1178 }
1179 EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
1180
1181 static struct scsi_transport_template *hisi_sas_stt;
1182
1183 static struct scsi_host_template hisi_sas_sht = {
1184 .module = THIS_MODULE,
1185 .name = DRV_NAME,
1186 .queuecommand = sas_queuecommand,
1187 .target_alloc = sas_target_alloc,
1188 .slave_configure = hisi_sas_slave_configure,
1189 .scan_finished = hisi_sas_scan_finished,
1190 .scan_start = hisi_sas_scan_start,
1191 .change_queue_depth = sas_change_queue_depth,
1192 .bios_param = sas_bios_param,
1193 .can_queue = 1,
1194 .this_id = -1,
1195 .sg_tablesize = SG_ALL,
1196 .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
1197 .use_clustering = ENABLE_CLUSTERING,
1198 .eh_device_reset_handler = sas_eh_device_reset_handler,
1199 .eh_bus_reset_handler = sas_eh_bus_reset_handler,
1200 .target_destroy = sas_target_destroy,
1201 .ioctl = sas_ioctl,
1202 };
1203
1204 static struct sas_domain_function_template hisi_sas_transport_ops = {
1205 .lldd_dev_found = hisi_sas_dev_found,
1206 .lldd_dev_gone = hisi_sas_dev_gone,
1207 .lldd_execute_task = hisi_sas_queue_command,
1208 .lldd_control_phy = hisi_sas_control_phy,
1209 .lldd_abort_task = hisi_sas_abort_task,
1210 .lldd_abort_task_set = hisi_sas_abort_task_set,
1211 .lldd_clear_aca = hisi_sas_clear_aca,
1212 .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
1213 .lldd_lu_reset = hisi_sas_lu_reset,
1214 .lldd_query_task = hisi_sas_query_task,
1215 .lldd_port_formed = hisi_sas_port_formed,
1216 .lldd_port_deformed = hisi_sas_port_deformed,
1217 };
1218
1219 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1220 {
1221 struct platform_device *pdev = hisi_hba->pdev;
1222 struct device *dev = &pdev->dev;
1223 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1224
1225 spin_lock_init(&hisi_hba->lock);
1226 for (i = 0; i < hisi_hba->n_phy; i++) {
1227 hisi_sas_phy_init(hisi_hba, i);
1228 hisi_hba->port[i].port_attached = 0;
1229 hisi_hba->port[i].id = -1;
1230 INIT_LIST_HEAD(&hisi_hba->port[i].list);
1231 }
1232
1233 for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1234 hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
1235 hisi_hba->devices[i].device_id = i;
1236 hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
1237 }
1238
1239 for (i = 0; i < hisi_hba->queue_count; i++) {
1240 struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1241 struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1242
1243 /* Completion queue structure */
1244 cq->id = i;
1245 cq->hisi_hba = hisi_hba;
1246
1247 /* Delivery queue structure */
1248 dq->id = i;
1249 dq->hisi_hba = hisi_hba;
1250
1251 /* Delivery queue */
1252 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1253 hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
1254 &hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
1255 if (!hisi_hba->cmd_hdr[i])
1256 goto err_out;
1257 memset(hisi_hba->cmd_hdr[i], 0, s);
1258
1259 /* Completion queue */
1260 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1261 hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
1262 &hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
1263 if (!hisi_hba->complete_hdr[i])
1264 goto err_out;
1265 memset(hisi_hba->complete_hdr[i], 0, s);
1266 }
1267
1268 s = HISI_SAS_STATUS_BUF_SZ;
1269 hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
1270 dev, s, 16, 0);
1271 if (!hisi_hba->status_buffer_pool)
1272 goto err_out;
1273
1274 s = HISI_SAS_COMMAND_TABLE_SZ;
1275 hisi_hba->command_table_pool = dma_pool_create("command_table",
1276 dev, s, 16, 0);
1277 if (!hisi_hba->command_table_pool)
1278 goto err_out;
1279
1280 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1281 hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
1282 GFP_KERNEL);
1283 if (!hisi_hba->itct)
1284 goto err_out;
1285
1286 memset(hisi_hba->itct, 0, s);
1287
1288 hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1289 sizeof(struct hisi_sas_slot),
1290 GFP_KERNEL);
1291 if (!hisi_hba->slot_info)
1292 goto err_out;
1293
1294 s = max_command_entries * sizeof(struct hisi_sas_iost);
1295 hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
1296 GFP_KERNEL);
1297 if (!hisi_hba->iost)
1298 goto err_out;
1299
1300 memset(hisi_hba->iost, 0, s);
1301
1302 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1303 hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
1304 &hisi_hba->breakpoint_dma, GFP_KERNEL);
1305 if (!hisi_hba->breakpoint)
1306 goto err_out;
1307
1308 memset(hisi_hba->breakpoint, 0, s);
1309
1310 hisi_hba->slot_index_count = max_command_entries;
1311 s = hisi_hba->slot_index_count / BITS_PER_BYTE;
1312 hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
1313 if (!hisi_hba->slot_index_tags)
1314 goto err_out;
1315
1316 hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
1317 sizeof(struct hisi_sas_sge_page), 16, 0);
1318 if (!hisi_hba->sge_page_pool)
1319 goto err_out;
1320
1321 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1322 hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
1323 &hisi_hba->initial_fis_dma, GFP_KERNEL);
1324 if (!hisi_hba->initial_fis)
1325 goto err_out;
1326 memset(hisi_hba->initial_fis, 0, s);
1327
1328 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1329 hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
1330 &hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
1331 if (!hisi_hba->sata_breakpoint)
1332 goto err_out;
1333 memset(hisi_hba->sata_breakpoint, 0, s);
1334
1335 hisi_sas_slot_index_init(hisi_hba);
1336
1337 hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
1338 if (!hisi_hba->wq) {
1339 dev_err(dev, "sas_alloc: failed to create workqueue\n");
1340 goto err_out;
1341 }
1342
1343 return 0;
1344 err_out:
1345 return -ENOMEM;
1346 }
1347
1348 static void hisi_sas_free(struct hisi_hba *hisi_hba)
1349 {
1350 struct device *dev = &hisi_hba->pdev->dev;
1351 int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1352
1353 for (i = 0; i < hisi_hba->queue_count; i++) {
1354 s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
1355 if (hisi_hba->cmd_hdr[i])
1356 dma_free_coherent(dev, s,
1357 hisi_hba->cmd_hdr[i],
1358 hisi_hba->cmd_hdr_dma[i]);
1359
1360 s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
1361 if (hisi_hba->complete_hdr[i])
1362 dma_free_coherent(dev, s,
1363 hisi_hba->complete_hdr[i],
1364 hisi_hba->complete_hdr_dma[i]);
1365 }
1366
1367 dma_pool_destroy(hisi_hba->status_buffer_pool);
1368 dma_pool_destroy(hisi_hba->command_table_pool);
1369 dma_pool_destroy(hisi_hba->sge_page_pool);
1370
1371 s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
1372 if (hisi_hba->itct)
1373 dma_free_coherent(dev, s,
1374 hisi_hba->itct, hisi_hba->itct_dma);
1375
1376 s = max_command_entries * sizeof(struct hisi_sas_iost);
1377 if (hisi_hba->iost)
1378 dma_free_coherent(dev, s,
1379 hisi_hba->iost, hisi_hba->iost_dma);
1380
1381 s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1382 if (hisi_hba->breakpoint)
1383 dma_free_coherent(dev, s,
1384 hisi_hba->breakpoint,
1385 hisi_hba->breakpoint_dma);
1386
1387
1388 s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
1389 if (hisi_hba->initial_fis)
1390 dma_free_coherent(dev, s,
1391 hisi_hba->initial_fis,
1392 hisi_hba->initial_fis_dma);
1393
1394 s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1395 if (hisi_hba->sata_breakpoint)
1396 dma_free_coherent(dev, s,
1397 hisi_hba->sata_breakpoint,
1398 hisi_hba->sata_breakpoint_dma);
1399
1400 if (hisi_hba->wq)
1401 destroy_workqueue(hisi_hba->wq);
1402 }
1403
1404 static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
1405 const struct hisi_sas_hw *hw)
1406 {
1407 struct resource *res;
1408 struct Scsi_Host *shost;
1409 struct hisi_hba *hisi_hba;
1410 struct device *dev = &pdev->dev;
1411 struct device_node *np = pdev->dev.of_node;
1412 struct clk *refclk;
1413
1414 shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
1415 if (!shost) {
1416 dev_err(dev, "scsi host alloc failed\n");
1417 return NULL;
1418 }
1419 hisi_hba = shost_priv(shost);
1420
1421 hisi_hba->hw = hw;
1422 hisi_hba->pdev = pdev;
1423 hisi_hba->shost = shost;
1424 SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
1425
1426 init_timer(&hisi_hba->timer);
1427
1428 if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1429 SAS_ADDR_SIZE))
1430 goto err_out;
1431
1432 if (np) {
1433 hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
1434 "hisilicon,sas-syscon");
1435 if (IS_ERR(hisi_hba->ctrl))
1436 goto err_out;
1437
1438 if (device_property_read_u32(dev, "ctrl-reset-reg",
1439 &hisi_hba->ctrl_reset_reg))
1440 goto err_out;
1441
1442 if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1443 &hisi_hba->ctrl_reset_sts_reg))
1444 goto err_out;
1445
1446 if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1447 &hisi_hba->ctrl_clock_ena_reg))
1448 goto err_out;
1449 }
1450
1451 refclk = devm_clk_get(&pdev->dev, NULL);
1452 if (IS_ERR(refclk))
1453 dev_info(dev, "no ref clk property\n");
1454 else
1455 hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
1456
1457 if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
1458 goto err_out;
1459
1460 if (device_property_read_u32(dev, "queue-count",
1461 &hisi_hba->queue_count))
1462 goto err_out;
1463
1464 if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
1465 dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
1466 dev_err(dev, "No usable DMA addressing method\n");
1467 goto err_out;
1468 }
1469
1470 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1471 hisi_hba->regs = devm_ioremap_resource(dev, res);
1472 if (IS_ERR(hisi_hba->regs))
1473 goto err_out;
1474
1475 if (hisi_sas_alloc(hisi_hba, shost)) {
1476 hisi_sas_free(hisi_hba);
1477 goto err_out;
1478 }
1479
1480 return shost;
1481 err_out:
1482 kfree(shost);
1483 dev_err(dev, "shost alloc failed\n");
1484 return NULL;
1485 }
1486
1487 static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1488 {
1489 int i;
1490
1491 for (i = 0; i < hisi_hba->n_phy; i++)
1492 memcpy(&hisi_hba->phy[i].dev_sas_addr,
1493 hisi_hba->sas_addr,
1494 SAS_ADDR_SIZE);
1495 }
1496
1497 int hisi_sas_probe(struct platform_device *pdev,
1498 const struct hisi_sas_hw *hw)
1499 {
1500 struct Scsi_Host *shost;
1501 struct hisi_hba *hisi_hba;
1502 struct device *dev = &pdev->dev;
1503 struct asd_sas_phy **arr_phy;
1504 struct asd_sas_port **arr_port;
1505 struct sas_ha_struct *sha;
1506 int rc, phy_nr, port_nr, i;
1507
1508 shost = hisi_sas_shost_alloc(pdev, hw);
1509 if (!shost)
1510 return -ENOMEM;
1511
1512 sha = SHOST_TO_SAS_HA(shost);
1513 hisi_hba = shost_priv(shost);
1514 platform_set_drvdata(pdev, sha);
1515
1516 phy_nr = port_nr = hisi_hba->n_phy;
1517
1518 arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
1519 arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
1520 if (!arr_phy || !arr_port) {
1521 rc = -ENOMEM;
1522 goto err_out_ha;
1523 }
1524
1525 sha->sas_phy = arr_phy;
1526 sha->sas_port = arr_port;
1527 sha->lldd_ha = hisi_hba;
1528
1529 shost->transportt = hisi_sas_stt;
1530 shost->max_id = HISI_SAS_MAX_DEVICES;
1531 shost->max_lun = ~0;
1532 shost->max_channel = 1;
1533 shost->max_cmd_len = 16;
1534 shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
1535 shost->can_queue = hisi_hba->hw->max_command_entries;
1536 shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
1537
1538 sha->sas_ha_name = DRV_NAME;
1539 sha->dev = &hisi_hba->pdev->dev;
1540 sha->lldd_module = THIS_MODULE;
1541 sha->sas_addr = &hisi_hba->sas_addr[0];
1542 sha->num_phys = hisi_hba->n_phy;
1543 sha->core.shost = hisi_hba->shost;
1544
1545 for (i = 0; i < hisi_hba->n_phy; i++) {
1546 sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
1547 sha->sas_port[i] = &hisi_hba->port[i].sas_port;
1548 }
1549
1550 hisi_sas_init_add(hisi_hba);
1551
1552 rc = hisi_hba->hw->hw_init(hisi_hba);
1553 if (rc)
1554 goto err_out_ha;
1555
1556 rc = scsi_add_host(shost, &pdev->dev);
1557 if (rc)
1558 goto err_out_ha;
1559
1560 rc = sas_register_ha(sha);
1561 if (rc)
1562 goto err_out_register_ha;
1563
1564 scsi_scan_host(shost);
1565
1566 return 0;
1567
1568 err_out_register_ha:
1569 scsi_remove_host(shost);
1570 err_out_ha:
1571 hisi_sas_free(hisi_hba);
1572 kfree(shost);
1573 return rc;
1574 }
1575 EXPORT_SYMBOL_GPL(hisi_sas_probe);
1576
1577 int hisi_sas_remove(struct platform_device *pdev)
1578 {
1579 struct sas_ha_struct *sha = platform_get_drvdata(pdev);
1580 struct hisi_hba *hisi_hba = sha->lldd_ha;
1581 struct Scsi_Host *shost = sha->core.shost;
1582
1583 scsi_remove_host(sha->core.shost);
1584 sas_unregister_ha(sha);
1585 sas_remove_host(sha->core.shost);
1586
1587 hisi_sas_free(hisi_hba);
1588 kfree(shost);
1589 return 0;
1590 }
1591 EXPORT_SYMBOL_GPL(hisi_sas_remove);
1592
1593 static __init int hisi_sas_init(void)
1594 {
1595 pr_info("hisi_sas: driver version %s\n", DRV_VERSION);
1596
1597 hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
1598 if (!hisi_sas_stt)
1599 return -ENOMEM;
1600
1601 return 0;
1602 }
1603
1604 static __exit void hisi_sas_exit(void)
1605 {
1606 sas_release_transport(hisi_sas_stt);
1607 }
1608
1609 module_init(hisi_sas_init);
1610 module_exit(hisi_sas_exit);
1611
1612 MODULE_VERSION(DRV_VERSION);
1613 MODULE_LICENSE("GPL");
1614 MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
1615 MODULE_DESCRIPTION("HISILICON SAS controller driver");
1616 MODULE_ALIAS("platform:" DRV_NAME);
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