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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
20static 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
43static 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 if (pqi_sas_phy->added_to_port)
49 list_del(&pqi_sas_phy->phy_list_entry);
50 sas_phy_delete(phy);
51 kfree(pqi_sas_phy);
52}
53
54static 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
88static 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
108static 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
118static 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
149free_sas_port:
150 sas_port_free(port);
151free_pqi_port:
152 kfree(pqi_sas_port);
153
154 return NULL;
155}
156
157static 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
171static 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
184static 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
199struct 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
215int 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
250free_sas_phy:
251 pqi_free_sas_phy(pqi_sas_phy);
252free_sas_port:
253 pqi_free_sas_port(pqi_sas_port);
254free_sas_node:
255 pqi_free_sas_node(pqi_sas_node);
256
257 return rc;
258}
259
260void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
261{
262 pqi_free_sas_node(ctrl_info->sas_host);
263}
264
265int 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
292free_sas_port:
293 pqi_free_sas_port(pqi_sas_port);
294 device->sas_port = NULL;
295
296 return rc;
297}
298
299void 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
307static int pqi_sas_get_linkerrors(struct sas_phy *phy)
308{
309 return 0;
310}
311
312static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
313 u64 *identifier)
314{
315 int rc;
316 unsigned long flags;
317 struct Scsi_Host *shost;
318 struct pqi_ctrl_info *ctrl_info;
319 struct pqi_scsi_dev *found_device;
320 struct pqi_scsi_dev *device;
321
322 if (!rphy)
323 return -ENODEV;
324
325 shost = rphy_to_shost(rphy);
326 ctrl_info = shost_to_hba(shost);
327 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
328 found_device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
329
330 if (!found_device) {
331 rc = -ENODEV;
332 goto out;
333 }
334
335 if (found_device->devtype == TYPE_ENCLOSURE) {
336 *identifier = get_unaligned_be64(&found_device->wwid);
337 rc = 0;
338 goto out;
339 }
340
341 if (found_device->box_index == 0xff ||
342 found_device->phys_box_on_bus == 0 ||
343 found_device->bay == 0xff) {
344 rc = -EINVAL;
345 goto out;
346 }
347
348 list_for_each_entry(device, &ctrl_info->scsi_device_list,
349 scsi_device_list_entry) {
350 if (device->devtype == TYPE_ENCLOSURE &&
351 device->box_index == found_device->box_index &&
352 device->phys_box_on_bus ==
353 found_device->phys_box_on_bus &&
354 memcmp(device->phys_connector,
355 found_device->phys_connector, 2) == 0) {
356 *identifier =
357 get_unaligned_be64(&device->wwid);
358 rc = 0;
359 goto out;
360 }
361 }
362
363 if (found_device->phy_connected_dev_type != SA_DEVICE_TYPE_CONTROLLER) {
364 rc = -EINVAL;
365 goto out;
366 }
367
368 list_for_each_entry(device, &ctrl_info->scsi_device_list,
369 scsi_device_list_entry) {
370 if (device->devtype == TYPE_ENCLOSURE &&
371 CISS_GET_DRIVE_NUMBER(device->scsi3addr) ==
372 PQI_VSEP_CISS_BTL) {
373 *identifier = get_unaligned_be64(&device->wwid);
374 rc = 0;
375 goto out;
376 }
377 }
378
379 rc = -EINVAL;
380out:
381 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
382
383 return rc;
384}
385
386static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
387{
388 int rc;
389 unsigned long flags;
390 struct pqi_ctrl_info *ctrl_info;
391 struct pqi_scsi_dev *device;
392 struct Scsi_Host *shost;
393
394 if (!rphy)
395 return -ENODEV;
396
397 shost = rphy_to_shost(rphy);
398 ctrl_info = shost_to_hba(shost);
399 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
400 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
401
402 if (!device) {
403 rc = -ENODEV;
404 goto out;
405 }
406
407 if (device->bay == 0xff)
408 rc = -EINVAL;
409 else
410 rc = device->bay;
411
412out:
413 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
414
415 return rc;
416}
417
418static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
419{
420 return 0;
421}
422
423static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
424{
425 return 0;
426}
427
428static int pqi_sas_phy_setup(struct sas_phy *phy)
429{
430 return 0;
431}
432
433static void pqi_sas_phy_release(struct sas_phy *phy)
434{
435}
436
437static int pqi_sas_phy_speed(struct sas_phy *phy,
438 struct sas_phy_linkrates *rates)
439{
440 return -EINVAL;
441}
442
443#define CSMI_IOCTL_TIMEOUT 60
444#define SMP_CRC_FIELD_LENGTH 4
445
446static struct bmic_csmi_smp_passthru_buffer *
447pqi_build_csmi_smp_passthru_buffer(struct sas_rphy *rphy,
448 struct bsg_job *job)
449{
450 struct bmic_csmi_smp_passthru_buffer *smp_buf;
451 struct bmic_csmi_ioctl_header *ioctl_header;
452 struct bmic_csmi_smp_passthru *parameters;
453 u32 req_size;
454 u32 resp_size;
455
456 smp_buf = kzalloc(sizeof(*smp_buf), GFP_KERNEL);
457 if (!smp_buf)
458 return NULL;
459
460 req_size = job->request_payload.payload_len;
461 resp_size = job->reply_payload.payload_len;
462
463 ioctl_header = &smp_buf->ioctl_header;
464 put_unaligned_le32(sizeof(smp_buf->ioctl_header),
465 &ioctl_header->header_length);
466 put_unaligned_le32(CSMI_IOCTL_TIMEOUT, &ioctl_header->timeout);
467 put_unaligned_le32(CSMI_CC_SAS_SMP_PASSTHRU,
468 &ioctl_header->control_code);
469 put_unaligned_le32(sizeof(smp_buf->parameters), &ioctl_header->length);
470
471 parameters = &smp_buf->parameters;
472 parameters->phy_identifier = rphy->identify.phy_identifier;
473 parameters->port_identifier = 0;
474 parameters->connection_rate = 0;
475 put_unaligned_be64(rphy->identify.sas_address,
476 ¶meters->destination_sas_address);
477
478 if (req_size > SMP_CRC_FIELD_LENGTH)
479 req_size -= SMP_CRC_FIELD_LENGTH;
480
481 put_unaligned_le32(req_size, ¶meters->request_length);
482 put_unaligned_le32(resp_size, ¶meters->response_length);
483
484 sg_copy_to_buffer(job->request_payload.sg_list,
485 job->reply_payload.sg_cnt, ¶meters->request,
486 req_size);
487
488 return smp_buf;
489}
490
491static unsigned int pqi_build_sas_smp_handler_reply(
492 struct bmic_csmi_smp_passthru_buffer *smp_buf, struct bsg_job *job,
493 struct pqi_raid_error_info *error_info)
494{
495 sg_copy_from_buffer(job->reply_payload.sg_list,
496 job->reply_payload.sg_cnt, &smp_buf->parameters.response,
497 le32_to_cpu(smp_buf->parameters.response_length));
498
499 job->reply_len = le16_to_cpu(error_info->sense_data_length);
500 memcpy(job->reply, error_info->data,
501 le16_to_cpu(error_info->sense_data_length));
502
503 return job->reply_payload.payload_len -
504 get_unaligned_le32(&error_info->data_in_transferred);
505}
506
507void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
508 struct sas_rphy *rphy)
509{
510 int rc;
511 struct pqi_ctrl_info *ctrl_info;
512 struct bmic_csmi_smp_passthru_buffer *smp_buf;
513 struct pqi_raid_error_info error_info;
514 unsigned int reslen = 0;
515
516 ctrl_info = shost_to_hba(shost);
517
518 if (job->reply_payload.payload_len == 0) {
519 rc = -ENOMEM;
520 goto out;
521 }
522
523 if (!rphy) {
524 rc = -EINVAL;
525 goto out;
526 }
527
528 if (rphy->identify.device_type != SAS_FANOUT_EXPANDER_DEVICE) {
529 rc = -EINVAL;
530 goto out;
531 }
532
533 if (job->request_payload.sg_cnt > 1 || job->reply_payload.sg_cnt > 1) {
534 rc = -EINVAL;
535 goto out;
536 }
537
538 smp_buf = pqi_build_csmi_smp_passthru_buffer(rphy, job);
539 if (!smp_buf) {
540 rc = -ENOMEM;
541 goto out;
542 }
543
544 rc = pqi_csmi_smp_passthru(ctrl_info, smp_buf, sizeof(*smp_buf),
545 &error_info);
546 if (rc)
547 goto out;
548
549 reslen = pqi_build_sas_smp_handler_reply(smp_buf, job, &error_info);
550out:
551 bsg_job_done(job, rc, reslen);
552 pqi_ctrl_unbusy(ctrl_info);
553}
554struct sas_function_template pqi_sas_transport_functions = {
555 .get_linkerrors = pqi_sas_get_linkerrors,
556 .get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
557 .get_bay_identifier = pqi_sas_get_bay_identifier,
558 .phy_reset = pqi_sas_phy_reset,
559 .phy_enable = pqi_sas_phy_enable,
560 .phy_setup = pqi_sas_phy_setup,
561 .phy_release = pqi_sas_phy_release,
562 .set_phy_speed = pqi_sas_phy_speed,
563 .smp_handler = pqi_sas_smp_handler,
564};
565
