1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * driver for Microsemi PQI-based storage controllers
4 * Copyright (c) 2019 Microchip Technology Inc. and its subsidiaries
5 * Copyright (c) 2016-2018 Microsemi Corporation
6 * Copyright (c) 2016 PMC-Sierra, Inc.
7 *
8 * Questions/Comments/Bugfixes to storagedev@microchip.com
9 *
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/bsg-lib.h>
14 #include <scsi/scsi_host.h>
15 #include <scsi/scsi_cmnd.h>
16 #include <scsi/scsi_transport_sas.h>
17 #include <asm/unaligned.h>
18 #include "smartpqi.h"
19
pqi_alloc_sas_phy(struct pqi_sas_port * pqi_sas_port)20 static struct pqi_sas_phy *pqi_alloc_sas_phy(struct pqi_sas_port *pqi_sas_port)
21 {
22 struct pqi_sas_phy *pqi_sas_phy;
23 struct sas_phy *phy;
24
25 pqi_sas_phy = kzalloc(sizeof(*pqi_sas_phy), GFP_KERNEL);
26 if (!pqi_sas_phy)
27 return NULL;
28
29 phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev,
30 pqi_sas_port->next_phy_index);
31 if (!phy) {
32 kfree(pqi_sas_phy);
33 return NULL;
34 }
35
36 pqi_sas_port->next_phy_index++;
37 pqi_sas_phy->phy = phy;
38 pqi_sas_phy->parent_port = pqi_sas_port;
39
40 return pqi_sas_phy;
41 }
42
pqi_free_sas_phy(struct pqi_sas_phy * pqi_sas_phy)43 static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy)
44 {
45 struct sas_phy *phy = pqi_sas_phy->phy;
46
47 sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy);
48 sas_phy_free(phy);
49 if (pqi_sas_phy->added_to_port)
50 list_del(&pqi_sas_phy->phy_list_entry);
51 kfree(pqi_sas_phy);
52 }
53
pqi_sas_port_add_phy(struct pqi_sas_phy * pqi_sas_phy)54 static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy)
55 {
56 int rc;
57 struct pqi_sas_port *pqi_sas_port;
58 struct sas_phy *phy;
59 struct sas_identify *identify;
60
61 pqi_sas_port = pqi_sas_phy->parent_port;
62 phy = pqi_sas_phy->phy;
63
64 identify = &phy->identify;
65 memset(identify, 0, sizeof(*identify));
66 identify->sas_address = pqi_sas_port->sas_address;
67 identify->device_type = SAS_END_DEVICE;
68 identify->initiator_port_protocols = SAS_PROTOCOL_STP;
69 identify->target_port_protocols = SAS_PROTOCOL_STP;
70 phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
71 phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
72 phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
73 phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
74 phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
75
76 rc = sas_phy_add(pqi_sas_phy->phy);
77 if (rc)
78 return rc;
79
80 sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy);
81 list_add_tail(&pqi_sas_phy->phy_list_entry,
82 &pqi_sas_port->phy_list_head);
83 pqi_sas_phy->added_to_port = true;
84
85 return 0;
86 }
87
pqi_sas_port_add_rphy(struct pqi_sas_port * pqi_sas_port,struct sas_rphy * rphy)88 static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
89 struct sas_rphy *rphy)
90 {
91 struct sas_identify *identify;
92
93 identify = &rphy->identify;
94 identify->sas_address = pqi_sas_port->sas_address;
95
96 if (pqi_sas_port->device &&
97 pqi_sas_port->device->is_expander_smp_device) {
98 identify->initiator_port_protocols = SAS_PROTOCOL_SMP;
99 identify->target_port_protocols = SAS_PROTOCOL_SMP;
100 } else {
101 identify->initiator_port_protocols = SAS_PROTOCOL_STP;
102 identify->target_port_protocols = SAS_PROTOCOL_STP;
103 }
104
105 return sas_rphy_add(rphy);
106 }
107
pqi_sas_rphy_alloc(struct pqi_sas_port * pqi_sas_port)108 static struct sas_rphy *pqi_sas_rphy_alloc(struct pqi_sas_port *pqi_sas_port)
109 {
110 if (pqi_sas_port->device &&
111 pqi_sas_port->device->is_expander_smp_device)
112 return sas_expander_alloc(pqi_sas_port->port,
113 SAS_FANOUT_EXPANDER_DEVICE);
114
115 return sas_end_device_alloc(pqi_sas_port->port);
116 }
117
pqi_alloc_sas_port(struct pqi_sas_node * pqi_sas_node,u64 sas_address,struct pqi_scsi_dev * device)118 static struct pqi_sas_port *pqi_alloc_sas_port(
119 struct pqi_sas_node *pqi_sas_node, u64 sas_address,
120 struct pqi_scsi_dev *device)
121 {
122 int rc;
123 struct pqi_sas_port *pqi_sas_port;
124 struct sas_port *port;
125
126 pqi_sas_port = kzalloc(sizeof(*pqi_sas_port), GFP_KERNEL);
127 if (!pqi_sas_port)
128 return NULL;
129
130 INIT_LIST_HEAD(&pqi_sas_port->phy_list_head);
131 pqi_sas_port->parent_node = pqi_sas_node;
132
133 port = sas_port_alloc_num(pqi_sas_node->parent_dev);
134 if (!port)
135 goto free_pqi_port;
136
137 rc = sas_port_add(port);
138 if (rc)
139 goto free_sas_port;
140
141 pqi_sas_port->port = port;
142 pqi_sas_port->sas_address = sas_address;
143 pqi_sas_port->device = device;
144 list_add_tail(&pqi_sas_port->port_list_entry,
145 &pqi_sas_node->port_list_head);
146
147 return pqi_sas_port;
148
149 free_sas_port:
150 sas_port_free(port);
151 free_pqi_port:
152 kfree(pqi_sas_port);
153
154 return NULL;
155 }
156
pqi_free_sas_port(struct pqi_sas_port * pqi_sas_port)157 static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port)
158 {
159 struct pqi_sas_phy *pqi_sas_phy;
160 struct pqi_sas_phy *next;
161
162 list_for_each_entry_safe(pqi_sas_phy, next,
163 &pqi_sas_port->phy_list_head, phy_list_entry)
164 pqi_free_sas_phy(pqi_sas_phy);
165
166 sas_port_delete(pqi_sas_port->port);
167 list_del(&pqi_sas_port->port_list_entry);
168 kfree(pqi_sas_port);
169 }
170
pqi_alloc_sas_node(struct device * parent_dev)171 static struct pqi_sas_node *pqi_alloc_sas_node(struct device *parent_dev)
172 {
173 struct pqi_sas_node *pqi_sas_node;
174
175 pqi_sas_node = kzalloc(sizeof(*pqi_sas_node), GFP_KERNEL);
176 if (pqi_sas_node) {
177 pqi_sas_node->parent_dev = parent_dev;
178 INIT_LIST_HEAD(&pqi_sas_node->port_list_head);
179 }
180
181 return pqi_sas_node;
182 }
183
pqi_free_sas_node(struct pqi_sas_node * pqi_sas_node)184 static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node)
185 {
186 struct pqi_sas_port *pqi_sas_port;
187 struct pqi_sas_port *next;
188
189 if (!pqi_sas_node)
190 return;
191
192 list_for_each_entry_safe(pqi_sas_port, next,
193 &pqi_sas_node->port_list_head, port_list_entry)
194 pqi_free_sas_port(pqi_sas_port);
195
196 kfree(pqi_sas_node);
197 }
198
pqi_find_device_by_sas_rphy(struct pqi_ctrl_info * ctrl_info,struct sas_rphy * rphy)199 struct pqi_scsi_dev *pqi_find_device_by_sas_rphy(
200 struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy)
201 {
202 struct pqi_scsi_dev *device;
203
204 list_for_each_entry(device, &ctrl_info->scsi_device_list,
205 scsi_device_list_entry) {
206 if (!device->sas_port)
207 continue;
208 if (device->sas_port->rphy == rphy)
209 return device;
210 }
211
212 return NULL;
213 }
214
pqi_add_sas_host(struct Scsi_Host * shost,struct pqi_ctrl_info * ctrl_info)215 int pqi_add_sas_host(struct Scsi_Host *shost, struct pqi_ctrl_info *ctrl_info)
216 {
217 int rc;
218 struct device *parent_dev;
219 struct pqi_sas_node *pqi_sas_node;
220 struct pqi_sas_port *pqi_sas_port;
221 struct pqi_sas_phy *pqi_sas_phy;
222
223 parent_dev = &shost->shost_dev;
224
225 pqi_sas_node = pqi_alloc_sas_node(parent_dev);
226 if (!pqi_sas_node)
227 return -ENOMEM;
228
229 pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node,
230 ctrl_info->sas_address, NULL);
231 if (!pqi_sas_port) {
232 rc = -ENODEV;
233 goto free_sas_node;
234 }
235
236 pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port);
237 if (!pqi_sas_phy) {
238 rc = -ENODEV;
239 goto free_sas_port;
240 }
241
242 rc = pqi_sas_port_add_phy(pqi_sas_phy);
243 if (rc)
244 goto free_sas_phy;
245
246 ctrl_info->sas_host = pqi_sas_node;
247
248 return 0;
249
250 free_sas_phy:
251 pqi_free_sas_phy(pqi_sas_phy);
252 free_sas_port:
253 pqi_free_sas_port(pqi_sas_port);
254 free_sas_node:
255 pqi_free_sas_node(pqi_sas_node);
256
257 return rc;
258 }
259
pqi_delete_sas_host(struct pqi_ctrl_info * ctrl_info)260 void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
261 {
262 pqi_free_sas_node(ctrl_info->sas_host);
263 }
264
pqi_add_sas_device(struct pqi_sas_node * pqi_sas_node,struct pqi_scsi_dev * device)265 int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
266 struct pqi_scsi_dev *device)
267 {
268 int rc;
269 struct pqi_sas_port *pqi_sas_port;
270 struct sas_rphy *rphy;
271
272 pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node,
273 device->sas_address, device);
274 if (!pqi_sas_port)
275 return -ENOMEM;
276
277 rphy = pqi_sas_rphy_alloc(pqi_sas_port);
278 if (!rphy) {
279 rc = -ENODEV;
280 goto free_sas_port;
281 }
282
283 pqi_sas_port->rphy = rphy;
284 device->sas_port = pqi_sas_port;
285
286 rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy);
287 if (rc)
288 goto free_sas_port;
289
290 return 0;
291
292 free_sas_port:
293 pqi_free_sas_port(pqi_sas_port);
294 device->sas_port = NULL;
295
296 return rc;
297 }
298
pqi_remove_sas_device(struct pqi_scsi_dev * device)299 void pqi_remove_sas_device(struct pqi_scsi_dev *device)
300 {
301 if (device->sas_port) {
302 pqi_free_sas_port(device->sas_port);
303 device->sas_port = NULL;
304 }
305 }
306
pqi_sas_get_linkerrors(struct sas_phy * phy)307 static int pqi_sas_get_linkerrors(struct sas_phy *phy)
308 {
309 return 0;
310 }
311
pqi_sas_get_enclosure_identifier(struct sas_rphy * rphy,u64 * identifier)312 static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
313 u64 *identifier)
314 {
315
316 int rc;
317 unsigned long flags;
318 struct Scsi_Host *shost;
319 struct pqi_ctrl_info *ctrl_info;
320 struct pqi_scsi_dev *found_device;
321 struct pqi_scsi_dev *device;
322
323 if (!rphy)
324 return -ENODEV;
325
326 shost = rphy_to_shost(rphy);
327 ctrl_info = shost_to_hba(shost);
328 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
329 found_device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
330
331 if (!found_device) {
332 rc = -ENODEV;
333 goto out;
334 }
335
336 if (found_device->devtype == TYPE_ENCLOSURE) {
337 *identifier = get_unaligned_be64(&found_device->wwid);
338 rc = 0;
339 goto out;
340 }
341
342 if (found_device->box_index == 0xff ||
343 found_device->phys_box_on_bus == 0 ||
344 found_device->bay == 0xff) {
345 rc = -EINVAL;
346 goto out;
347 }
348
349 list_for_each_entry(device, &ctrl_info->scsi_device_list,
350 scsi_device_list_entry) {
351 if (device->devtype == TYPE_ENCLOSURE &&
352 device->box_index == found_device->box_index &&
353 device->phys_box_on_bus ==
354 found_device->phys_box_on_bus &&
355 memcmp(device->phys_connector,
356 found_device->phys_connector, 2) == 0) {
357 *identifier =
358 get_unaligned_be64(&device->wwid);
359 rc = 0;
360 goto out;
361 }
362 }
363
364 if (found_device->phy_connected_dev_type != SA_CONTROLLER_DEVICE) {
365 rc = -EINVAL;
366 goto out;
367 }
368
369 list_for_each_entry(device, &ctrl_info->scsi_device_list,
370 scsi_device_list_entry) {
371 if (device->devtype == TYPE_ENCLOSURE &&
372 CISS_GET_DRIVE_NUMBER(device->scsi3addr) ==
373 PQI_VSEP_CISS_BTL) {
374 *identifier = get_unaligned_be64(&device->wwid);
375 rc = 0;
376 goto out;
377 }
378 }
379
380 rc = -EINVAL;
381 out:
382 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
383
384 return rc;
385
386 }
387
pqi_sas_get_bay_identifier(struct sas_rphy * rphy)388 static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
389 {
390
391 int rc;
392 unsigned long flags;
393 struct pqi_ctrl_info *ctrl_info;
394 struct pqi_scsi_dev *device;
395 struct Scsi_Host *shost;
396
397 if (!rphy)
398 return -ENODEV;
399
400 shost = rphy_to_shost(rphy);
401 ctrl_info = shost_to_hba(shost);
402 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
403 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
404
405 if (!device) {
406 rc = -ENODEV;
407 goto out;
408 }
409
410 if (device->bay == 0xff)
411 rc = -EINVAL;
412 else
413 rc = device->bay;
414
415 out:
416 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
417
418 return rc;
419 }
420
pqi_sas_phy_reset(struct sas_phy * phy,int hard_reset)421 static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
422 {
423 return 0;
424 }
425
pqi_sas_phy_enable(struct sas_phy * phy,int enable)426 static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
427 {
428 return 0;
429 }
430
pqi_sas_phy_setup(struct sas_phy * phy)431 static int pqi_sas_phy_setup(struct sas_phy *phy)
432 {
433 return 0;
434 }
435
pqi_sas_phy_release(struct sas_phy * phy)436 static void pqi_sas_phy_release(struct sas_phy *phy)
437 {
438 }
439
pqi_sas_phy_speed(struct sas_phy * phy,struct sas_phy_linkrates * rates)440 static int pqi_sas_phy_speed(struct sas_phy *phy,
441 struct sas_phy_linkrates *rates)
442 {
443 return -EINVAL;
444 }
445
446 #define CSMI_IOCTL_TIMEOUT 60
447 #define SMP_CRC_FIELD_LENGTH 4
448
449 static struct bmic_csmi_smp_passthru_buffer *
pqi_build_csmi_smp_passthru_buffer(struct sas_rphy * rphy,struct bsg_job * job)450 pqi_build_csmi_smp_passthru_buffer(struct sas_rphy *rphy,
451 struct bsg_job *job)
452 {
453 struct bmic_csmi_smp_passthru_buffer *smp_buf;
454 struct bmic_csmi_ioctl_header *ioctl_header;
455 struct bmic_csmi_smp_passthru *parameters;
456 u32 req_size;
457 u32 resp_size;
458
459 smp_buf = kzalloc(sizeof(*smp_buf), GFP_KERNEL);
460 if (!smp_buf)
461 return NULL;
462
463 req_size = job->request_payload.payload_len;
464 resp_size = job->reply_payload.payload_len;
465
466 ioctl_header = &smp_buf->ioctl_header;
467 put_unaligned_le32(sizeof(smp_buf->ioctl_header),
468 &ioctl_header->header_length);
469 put_unaligned_le32(CSMI_IOCTL_TIMEOUT, &ioctl_header->timeout);
470 put_unaligned_le32(CSMI_CC_SAS_SMP_PASSTHRU,
471 &ioctl_header->control_code);
472 put_unaligned_le32(sizeof(smp_buf->parameters), &ioctl_header->length);
473
474 parameters = &smp_buf->parameters;
475 parameters->phy_identifier = rphy->identify.phy_identifier;
476 parameters->port_identifier = 0;
477 parameters->connection_rate = 0;
478 put_unaligned_be64(rphy->identify.sas_address,
479 ¶meters->destination_sas_address);
480
481 if (req_size > SMP_CRC_FIELD_LENGTH)
482 req_size -= SMP_CRC_FIELD_LENGTH;
483
484 put_unaligned_le32(req_size, ¶meters->request_length);
485
486 put_unaligned_le32(resp_size, ¶meters->response_length);
487
488 sg_copy_to_buffer(job->request_payload.sg_list,
489 job->reply_payload.sg_cnt, ¶meters->request,
490 req_size);
491
492 return smp_buf;
493 }
494
pqi_build_sas_smp_handler_reply(struct bmic_csmi_smp_passthru_buffer * smp_buf,struct bsg_job * job,struct pqi_raid_error_info * error_info)495 static unsigned int pqi_build_sas_smp_handler_reply(
496 struct bmic_csmi_smp_passthru_buffer *smp_buf, struct bsg_job *job,
497 struct pqi_raid_error_info *error_info)
498 {
499 sg_copy_from_buffer(job->reply_payload.sg_list,
500 job->reply_payload.sg_cnt, &smp_buf->parameters.response,
501 le32_to_cpu(smp_buf->parameters.response_length));
502
503 job->reply_len = le16_to_cpu(error_info->sense_data_length);
504 memcpy(job->reply, error_info->data,
505 le16_to_cpu(error_info->sense_data_length));
506
507 return job->reply_payload.payload_len -
508 get_unaligned_le32(&error_info->data_in_transferred);
509 }
510
pqi_sas_smp_handler(struct bsg_job * job,struct Scsi_Host * shost,struct sas_rphy * rphy)511 void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
512 struct sas_rphy *rphy)
513 {
514 int rc;
515 struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
516 struct bmic_csmi_smp_passthru_buffer *smp_buf;
517 struct pqi_raid_error_info error_info;
518 unsigned int reslen = 0;
519
520 pqi_ctrl_busy(ctrl_info);
521
522 if (job->reply_payload.payload_len == 0) {
523 rc = -ENOMEM;
524 goto out;
525 }
526
527 if (!rphy) {
528 rc = -EINVAL;
529 goto out;
530 }
531
532 if (rphy->identify.device_type != SAS_FANOUT_EXPANDER_DEVICE) {
533 rc = -EINVAL;
534 goto out;
535 }
536
537 if (job->request_payload.sg_cnt > 1 || job->reply_payload.sg_cnt > 1) {
538 rc = -EINVAL;
539 goto out;
540 }
541
542 if (pqi_ctrl_offline(ctrl_info)) {
543 rc = -ENXIO;
544 goto out;
545 }
546
547 if (pqi_ctrl_blocked(ctrl_info)) {
548 rc = -EBUSY;
549 goto out;
550 }
551
552 smp_buf = pqi_build_csmi_smp_passthru_buffer(rphy, job);
553 if (!smp_buf) {
554 rc = -ENOMEM;
555 goto out;
556 }
557
558 rc = pqi_csmi_smp_passthru(ctrl_info, smp_buf, sizeof(*smp_buf),
559 &error_info);
560 if (rc)
561 goto out;
562
563 reslen = pqi_build_sas_smp_handler_reply(smp_buf, job, &error_info);
564 out:
565 bsg_job_done(job, rc, reslen);
566 pqi_ctrl_unbusy(ctrl_info);
567 }
568 struct sas_function_template pqi_sas_transport_functions = {
569 .get_linkerrors = pqi_sas_get_linkerrors,
570 .get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
571 .get_bay_identifier = pqi_sas_get_bay_identifier,
572 .phy_reset = pqi_sas_phy_reset,
573 .phy_enable = pqi_sas_phy_enable,
574 .phy_setup = pqi_sas_phy_setup,
575 .phy_release = pqi_sas_phy_release,
576 .set_phy_speed = pqi_sas_phy_speed,
577 .smp_handler = pqi_sas_smp_handler,
578 };
579
