1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2005-2006 Dell Inc.
4 *
5 * Serial Attached SCSI (SAS) transport class.
6 *
7 * The SAS transport class contains common code to deal with SAS HBAs,
8 * an aproximated representation of SAS topologies in the driver model,
9 * and various sysfs attributes to expose these topologies and management
10 * interfaces to userspace.
11 *
12 * In addition to the basic SCSI core objects this transport class
13 * introduces two additional intermediate objects: The SAS PHY
14 * as represented by struct sas_phy defines an "outgoing" PHY on
15 * a SAS HBA or Expander, and the SAS remote PHY represented by
16 * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
17 * end device. Note that this is purely a software concept, the
18 * underlying hardware for a PHY and a remote PHY is the exactly
19 * the same.
20 *
21 * There is no concept of a SAS port in this code, users can see
22 * what PHYs form a wide port based on the port_identifier attribute,
23 * which is the same for all PHYs in a port.
24 */
25
26 #include <linux/init.h>
27 #include <linux/module.h>
28 #include <linux/jiffies.h>
29 #include <linux/err.h>
30 #include <linux/slab.h>
31 #include <linux/string.h>
32 #include <linux/blkdev.h>
33 #include <linux/bsg.h>
34
35 #include <scsi/scsi.h>
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_device.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_transport.h>
40 #include <scsi/scsi_transport_sas.h>
41
42 #include "scsi_sas_internal.h"
43 struct sas_host_attrs {
44 struct list_head rphy_list;
45 struct mutex lock;
46 struct request_queue *q;
47 u32 next_target_id;
48 u32 next_expander_id;
49 int next_port_id;
50 };
51 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
52
53
54 /*
55 * Hack to allow attributes of the same name in different objects.
56 */
57 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
58 struct device_attribute dev_attr_##_prefix##_##_name = \
59 __ATTR(_name,_mode,_show,_store)
60
61
62 /*
63 * Pretty printing helpers
64 */
65
66 #define sas_bitfield_name_match(title, table) \
67 static ssize_t \
68 get_sas_##title##_names(u32 table_key, char *buf) \
69 { \
70 char *prefix = ""; \
71 ssize_t len = 0; \
72 int i; \
73 \
74 for (i = 0; i < ARRAY_SIZE(table); i++) { \
75 if (table[i].value & table_key) { \
76 len += sprintf(buf + len, "%s%s", \
77 prefix, table[i].name); \
78 prefix = ", "; \
79 } \
80 } \
81 len += sprintf(buf + len, "\n"); \
82 return len; \
83 }
84
85 #define sas_bitfield_name_set(title, table) \
86 static ssize_t \
87 set_sas_##title##_names(u32 *table_key, const char *buf) \
88 { \
89 ssize_t len = 0; \
90 int i; \
91 \
92 for (i = 0; i < ARRAY_SIZE(table); i++) { \
93 len = strlen(table[i].name); \
94 if (strncmp(buf, table[i].name, len) == 0 && \
95 (buf[len] == '\n' || buf[len] == '\0')) { \
96 *table_key = table[i].value; \
97 return 0; \
98 } \
99 } \
100 return -EINVAL; \
101 }
102
103 #define sas_bitfield_name_search(title, table) \
104 static ssize_t \
105 get_sas_##title##_names(u32 table_key, char *buf) \
106 { \
107 ssize_t len = 0; \
108 int i; \
109 \
110 for (i = 0; i < ARRAY_SIZE(table); i++) { \
111 if (table[i].value == table_key) { \
112 len += sprintf(buf + len, "%s", \
113 table[i].name); \
114 break; \
115 } \
116 } \
117 len += sprintf(buf + len, "\n"); \
118 return len; \
119 }
120
121 static struct {
122 u32 value;
123 char *name;
124 } sas_device_type_names[] = {
125 { SAS_PHY_UNUSED, "unused" },
126 { SAS_END_DEVICE, "end device" },
127 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
128 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
129 };
130 sas_bitfield_name_search(device_type, sas_device_type_names)
131
132
133 static struct {
134 u32 value;
135 char *name;
136 } sas_protocol_names[] = {
137 { SAS_PROTOCOL_SATA, "sata" },
138 { SAS_PROTOCOL_SMP, "smp" },
139 { SAS_PROTOCOL_STP, "stp" },
140 { SAS_PROTOCOL_SSP, "ssp" },
141 };
142 sas_bitfield_name_match(protocol, sas_protocol_names)
143
144 static struct {
145 u32 value;
146 char *name;
147 } sas_linkspeed_names[] = {
148 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
149 { SAS_PHY_DISABLED, "Phy disabled" },
150 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
151 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
152 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
153 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
154 { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
155 { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
156 { SAS_LINK_RATE_22_5_GBPS, "22.5 Gbit" },
157 };
sas_bitfield_name_search(linkspeed,sas_linkspeed_names)158 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
159 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
160
161 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
162 {
163 struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
164 struct sas_end_device *rdev;
165
166 BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
167
168 rdev = rphy_to_end_device(rphy);
169 return rdev;
170 }
171
sas_smp_dispatch(struct bsg_job * job)172 static int sas_smp_dispatch(struct bsg_job *job)
173 {
174 struct Scsi_Host *shost = dev_to_shost(job->dev);
175 struct sas_rphy *rphy = NULL;
176
177 if (!scsi_is_host_device(job->dev))
178 rphy = dev_to_rphy(job->dev);
179
180 if (!job->reply_payload.payload_len) {
181 dev_warn(job->dev, "space for a smp response is missing\n");
182 bsg_job_done(job, -EINVAL, 0);
183 return 0;
184 }
185
186 to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
187 return 0;
188 }
189
sas_bsg_initialize(struct Scsi_Host * shost,struct sas_rphy * rphy)190 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
191 {
192 struct request_queue *q;
193
194 if (!to_sas_internal(shost->transportt)->f->smp_handler) {
195 printk("%s can't handle SMP requests\n", shost->hostt->name);
196 return 0;
197 }
198
199 if (rphy) {
200 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev),
201 sas_smp_dispatch, NULL, 0);
202 if (IS_ERR(q))
203 return PTR_ERR(q);
204 rphy->q = q;
205 } else {
206 char name[20];
207
208 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
209 q = bsg_setup_queue(&shost->shost_gendev, name,
210 sas_smp_dispatch, NULL, 0);
211 if (IS_ERR(q))
212 return PTR_ERR(q);
213 to_sas_host_attrs(shost)->q = q;
214 }
215
216 return 0;
217 }
218
219 /*
220 * SAS host attributes
221 */
222
sas_host_setup(struct transport_container * tc,struct device * dev,struct device * cdev)223 static int sas_host_setup(struct transport_container *tc, struct device *dev,
224 struct device *cdev)
225 {
226 struct Scsi_Host *shost = dev_to_shost(dev);
227 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
228
229 INIT_LIST_HEAD(&sas_host->rphy_list);
230 mutex_init(&sas_host->lock);
231 sas_host->next_target_id = 0;
232 sas_host->next_expander_id = 0;
233 sas_host->next_port_id = 0;
234
235 if (sas_bsg_initialize(shost, NULL))
236 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
237 shost->host_no);
238
239 return 0;
240 }
241
sas_host_remove(struct transport_container * tc,struct device * dev,struct device * cdev)242 static int sas_host_remove(struct transport_container *tc, struct device *dev,
243 struct device *cdev)
244 {
245 struct Scsi_Host *shost = dev_to_shost(dev);
246 struct request_queue *q = to_sas_host_attrs(shost)->q;
247
248 bsg_remove_queue(q);
249 return 0;
250 }
251
252 static DECLARE_TRANSPORT_CLASS(sas_host_class,
253 "sas_host", sas_host_setup, sas_host_remove, NULL);
254
sas_host_match(struct attribute_container * cont,struct device * dev)255 static int sas_host_match(struct attribute_container *cont,
256 struct device *dev)
257 {
258 struct Scsi_Host *shost;
259 struct sas_internal *i;
260
261 if (!scsi_is_host_device(dev))
262 return 0;
263 shost = dev_to_shost(dev);
264
265 if (!shost->transportt)
266 return 0;
267 if (shost->transportt->host_attrs.ac.class !=
268 &sas_host_class.class)
269 return 0;
270
271 i = to_sas_internal(shost->transportt);
272 return &i->t.host_attrs.ac == cont;
273 }
274
do_sas_phy_delete(struct device * dev,void * data)275 static int do_sas_phy_delete(struct device *dev, void *data)
276 {
277 int pass = (int)(unsigned long)data;
278
279 if (pass == 0 && scsi_is_sas_port(dev))
280 sas_port_delete(dev_to_sas_port(dev));
281 else if (pass == 1 && scsi_is_sas_phy(dev))
282 sas_phy_delete(dev_to_phy(dev));
283 return 0;
284 }
285
286 /**
287 * sas_remove_children - tear down a devices SAS data structures
288 * @dev: device belonging to the sas object
289 *
290 * Removes all SAS PHYs and remote PHYs for a given object
291 */
sas_remove_children(struct device * dev)292 void sas_remove_children(struct device *dev)
293 {
294 device_for_each_child(dev, (void *)0, do_sas_phy_delete);
295 device_for_each_child(dev, (void *)1, do_sas_phy_delete);
296 }
297 EXPORT_SYMBOL(sas_remove_children);
298
299 /**
300 * sas_remove_host - tear down a Scsi_Host's SAS data structures
301 * @shost: Scsi Host that is torn down
302 *
303 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
304 * Scsi_Host as well.
305 *
306 * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
307 * already removed.
308 */
sas_remove_host(struct Scsi_Host * shost)309 void sas_remove_host(struct Scsi_Host *shost)
310 {
311 sas_remove_children(&shost->shost_gendev);
312 scsi_remove_host(shost);
313 }
314 EXPORT_SYMBOL(sas_remove_host);
315
316 /**
317 * sas_get_address - return the SAS address of the device
318 * @sdev: scsi device
319 *
320 * Returns the SAS address of the scsi device
321 */
sas_get_address(struct scsi_device * sdev)322 u64 sas_get_address(struct scsi_device *sdev)
323 {
324 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
325
326 return rdev->rphy.identify.sas_address;
327 }
328 EXPORT_SYMBOL(sas_get_address);
329
330 /**
331 * sas_tlr_supported - checking TLR bit in vpd 0x90
332 * @sdev: scsi device struct
333 *
334 * Check Transport Layer Retries are supported or not.
335 * If vpd page 0x90 is present, TRL is supported.
336 *
337 */
338 unsigned int
sas_tlr_supported(struct scsi_device * sdev)339 sas_tlr_supported(struct scsi_device *sdev)
340 {
341 const int vpd_len = 32;
342 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
343 char *buffer = kzalloc(vpd_len, GFP_KERNEL);
344 int ret = 0;
345
346 if (!buffer)
347 goto out;
348
349 if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
350 goto out;
351
352 /*
353 * Magic numbers: the VPD Protocol page (0x90)
354 * has a 4 byte header and then one entry per device port
355 * the TLR bit is at offset 8 on each port entry
356 * if we take the first port, that's at total offset 12
357 */
358 ret = buffer[12] & 0x01;
359
360 out:
361 kfree(buffer);
362 rdev->tlr_supported = ret;
363 return ret;
364
365 }
366 EXPORT_SYMBOL_GPL(sas_tlr_supported);
367
368 /**
369 * sas_disable_tlr - setting TLR flags
370 * @sdev: scsi device struct
371 *
372 * Seting tlr_enabled flag to 0.
373 *
374 */
375 void
sas_disable_tlr(struct scsi_device * sdev)376 sas_disable_tlr(struct scsi_device *sdev)
377 {
378 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
379
380 rdev->tlr_enabled = 0;
381 }
382 EXPORT_SYMBOL_GPL(sas_disable_tlr);
383
384 /**
385 * sas_enable_tlr - setting TLR flags
386 * @sdev: scsi device struct
387 *
388 * Seting tlr_enabled flag 1.
389 *
390 */
sas_enable_tlr(struct scsi_device * sdev)391 void sas_enable_tlr(struct scsi_device *sdev)
392 {
393 unsigned int tlr_supported = 0;
394 tlr_supported = sas_tlr_supported(sdev);
395
396 if (tlr_supported) {
397 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
398
399 rdev->tlr_enabled = 1;
400 }
401
402 return;
403 }
404 EXPORT_SYMBOL_GPL(sas_enable_tlr);
405
sas_is_tlr_enabled(struct scsi_device * sdev)406 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
407 {
408 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
409 return rdev->tlr_enabled;
410 }
411 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
412
413 /*
414 * SAS Phy attributes
415 */
416
417 #define sas_phy_show_simple(field, name, format_string, cast) \
418 static ssize_t \
419 show_sas_phy_##name(struct device *dev, \
420 struct device_attribute *attr, char *buf) \
421 { \
422 struct sas_phy *phy = transport_class_to_phy(dev); \
423 \
424 return snprintf(buf, 20, format_string, cast phy->field); \
425 }
426
427 #define sas_phy_simple_attr(field, name, format_string, type) \
428 sas_phy_show_simple(field, name, format_string, (type)) \
429 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
430
431 #define sas_phy_show_protocol(field, name) \
432 static ssize_t \
433 show_sas_phy_##name(struct device *dev, \
434 struct device_attribute *attr, char *buf) \
435 { \
436 struct sas_phy *phy = transport_class_to_phy(dev); \
437 \
438 if (!phy->field) \
439 return snprintf(buf, 20, "none\n"); \
440 return get_sas_protocol_names(phy->field, buf); \
441 }
442
443 #define sas_phy_protocol_attr(field, name) \
444 sas_phy_show_protocol(field, name) \
445 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
446
447 #define sas_phy_show_linkspeed(field) \
448 static ssize_t \
449 show_sas_phy_##field(struct device *dev, \
450 struct device_attribute *attr, char *buf) \
451 { \
452 struct sas_phy *phy = transport_class_to_phy(dev); \
453 \
454 return get_sas_linkspeed_names(phy->field, buf); \
455 }
456
457 /* Fudge to tell if we're minimum or maximum */
458 #define sas_phy_store_linkspeed(field) \
459 static ssize_t \
460 store_sas_phy_##field(struct device *dev, \
461 struct device_attribute *attr, \
462 const char *buf, size_t count) \
463 { \
464 struct sas_phy *phy = transport_class_to_phy(dev); \
465 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
466 struct sas_internal *i = to_sas_internal(shost->transportt); \
467 u32 value; \
468 struct sas_phy_linkrates rates = {0}; \
469 int error; \
470 \
471 error = set_sas_linkspeed_names(&value, buf); \
472 if (error) \
473 return error; \
474 rates.field = value; \
475 error = i->f->set_phy_speed(phy, &rates); \
476 \
477 return error ? error : count; \
478 }
479
480 #define sas_phy_linkspeed_rw_attr(field) \
481 sas_phy_show_linkspeed(field) \
482 sas_phy_store_linkspeed(field) \
483 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
484 store_sas_phy_##field)
485
486 #define sas_phy_linkspeed_attr(field) \
487 sas_phy_show_linkspeed(field) \
488 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
489
490
491 #define sas_phy_show_linkerror(field) \
492 static ssize_t \
493 show_sas_phy_##field(struct device *dev, \
494 struct device_attribute *attr, char *buf) \
495 { \
496 struct sas_phy *phy = transport_class_to_phy(dev); \
497 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
498 struct sas_internal *i = to_sas_internal(shost->transportt); \
499 int error; \
500 \
501 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
502 if (error) \
503 return error; \
504 return snprintf(buf, 20, "%u\n", phy->field); \
505 }
506
507 #define sas_phy_linkerror_attr(field) \
508 sas_phy_show_linkerror(field) \
509 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
510
511
512 static ssize_t
show_sas_device_type(struct device * dev,struct device_attribute * attr,char * buf)513 show_sas_device_type(struct device *dev,
514 struct device_attribute *attr, char *buf)
515 {
516 struct sas_phy *phy = transport_class_to_phy(dev);
517
518 if (!phy->identify.device_type)
519 return snprintf(buf, 20, "none\n");
520 return get_sas_device_type_names(phy->identify.device_type, buf);
521 }
522 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
523
do_sas_phy_enable(struct device * dev,size_t count,int enable)524 static ssize_t do_sas_phy_enable(struct device *dev,
525 size_t count, int enable)
526 {
527 struct sas_phy *phy = transport_class_to_phy(dev);
528 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
529 struct sas_internal *i = to_sas_internal(shost->transportt);
530 int error;
531
532 error = i->f->phy_enable(phy, enable);
533 if (error)
534 return error;
535 phy->enabled = enable;
536 return count;
537 };
538
539 static ssize_t
store_sas_phy_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)540 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
541 const char *buf, size_t count)
542 {
543 if (count < 1)
544 return -EINVAL;
545
546 switch (buf[0]) {
547 case '0':
548 do_sas_phy_enable(dev, count, 0);
549 break;
550 case '1':
551 do_sas_phy_enable(dev, count, 1);
552 break;
553 default:
554 return -EINVAL;
555 }
556
557 return count;
558 }
559
560 static ssize_t
show_sas_phy_enable(struct device * dev,struct device_attribute * attr,char * buf)561 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
562 char *buf)
563 {
564 struct sas_phy *phy = transport_class_to_phy(dev);
565
566 return snprintf(buf, 20, "%d\n", phy->enabled);
567 }
568
569 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
570 store_sas_phy_enable);
571
572 static ssize_t
do_sas_phy_reset(struct device * dev,size_t count,int hard_reset)573 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
574 {
575 struct sas_phy *phy = transport_class_to_phy(dev);
576 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
577 struct sas_internal *i = to_sas_internal(shost->transportt);
578 int error;
579
580 error = i->f->phy_reset(phy, hard_reset);
581 if (error)
582 return error;
583 phy->enabled = 1;
584 return count;
585 };
586
587 static ssize_t
store_sas_link_reset(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)588 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
589 const char *buf, size_t count)
590 {
591 return do_sas_phy_reset(dev, count, 0);
592 }
593 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
594
595 static ssize_t
store_sas_hard_reset(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)596 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
597 const char *buf, size_t count)
598 {
599 return do_sas_phy_reset(dev, count, 1);
600 }
601 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
602
603 sas_phy_protocol_attr(identify.initiator_port_protocols,
604 initiator_port_protocols);
605 sas_phy_protocol_attr(identify.target_port_protocols,
606 target_port_protocols);
607 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
608 unsigned long long);
609 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
610 sas_phy_linkspeed_attr(negotiated_linkrate);
611 sas_phy_linkspeed_attr(minimum_linkrate_hw);
612 sas_phy_linkspeed_rw_attr(minimum_linkrate);
613 sas_phy_linkspeed_attr(maximum_linkrate_hw);
614 sas_phy_linkspeed_rw_attr(maximum_linkrate);
615 sas_phy_linkerror_attr(invalid_dword_count);
616 sas_phy_linkerror_attr(running_disparity_error_count);
617 sas_phy_linkerror_attr(loss_of_dword_sync_count);
618 sas_phy_linkerror_attr(phy_reset_problem_count);
619
sas_phy_setup(struct transport_container * tc,struct device * dev,struct device * cdev)620 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
621 struct device *cdev)
622 {
623 struct sas_phy *phy = dev_to_phy(dev);
624 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
625 struct sas_internal *i = to_sas_internal(shost->transportt);
626
627 if (i->f->phy_setup)
628 i->f->phy_setup(phy);
629
630 return 0;
631 }
632
633 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
634 "sas_phy", sas_phy_setup, NULL, NULL);
635
sas_phy_match(struct attribute_container * cont,struct device * dev)636 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
637 {
638 struct Scsi_Host *shost;
639 struct sas_internal *i;
640
641 if (!scsi_is_sas_phy(dev))
642 return 0;
643 shost = dev_to_shost(dev->parent);
644
645 if (!shost->transportt)
646 return 0;
647 if (shost->transportt->host_attrs.ac.class !=
648 &sas_host_class.class)
649 return 0;
650
651 i = to_sas_internal(shost->transportt);
652 return &i->phy_attr_cont.ac == cont;
653 }
654
sas_phy_release(struct device * dev)655 static void sas_phy_release(struct device *dev)
656 {
657 struct sas_phy *phy = dev_to_phy(dev);
658 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
659 struct sas_internal *i = to_sas_internal(shost->transportt);
660
661 if (i->f->phy_release)
662 i->f->phy_release(phy);
663 put_device(dev->parent);
664 kfree(phy);
665 }
666
667 /**
668 * sas_phy_alloc - allocates and initialize a SAS PHY structure
669 * @parent: Parent device
670 * @number: Phy index
671 *
672 * Allocates an SAS PHY structure. It will be added in the device tree
673 * below the device specified by @parent, which has to be either a Scsi_Host
674 * or sas_rphy.
675 *
676 * Returns:
677 * SAS PHY allocated or %NULL if the allocation failed.
678 */
sas_phy_alloc(struct device * parent,int number)679 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
680 {
681 struct Scsi_Host *shost = dev_to_shost(parent);
682 struct sas_phy *phy;
683
684 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
685 if (!phy)
686 return NULL;
687
688 phy->number = number;
689 phy->enabled = 1;
690
691 device_initialize(&phy->dev);
692 phy->dev.parent = get_device(parent);
693 phy->dev.release = sas_phy_release;
694 INIT_LIST_HEAD(&phy->port_siblings);
695 if (scsi_is_sas_expander_device(parent)) {
696 struct sas_rphy *rphy = dev_to_rphy(parent);
697 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
698 rphy->scsi_target_id, number);
699 } else
700 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
701
702 transport_setup_device(&phy->dev);
703
704 return phy;
705 }
706 EXPORT_SYMBOL(sas_phy_alloc);
707
708 /**
709 * sas_phy_add - add a SAS PHY to the device hierarchy
710 * @phy: The PHY to be added
711 *
712 * Publishes a SAS PHY to the rest of the system.
713 */
sas_phy_add(struct sas_phy * phy)714 int sas_phy_add(struct sas_phy *phy)
715 {
716 int error;
717
718 error = device_add(&phy->dev);
719 if (!error) {
720 transport_add_device(&phy->dev);
721 transport_configure_device(&phy->dev);
722 }
723
724 return error;
725 }
726 EXPORT_SYMBOL(sas_phy_add);
727
728 /**
729 * sas_phy_free - free a SAS PHY
730 * @phy: SAS PHY to free
731 *
732 * Frees the specified SAS PHY.
733 *
734 * Note:
735 * This function must only be called on a PHY that has not
736 * successfully been added using sas_phy_add().
737 */
sas_phy_free(struct sas_phy * phy)738 void sas_phy_free(struct sas_phy *phy)
739 {
740 transport_destroy_device(&phy->dev);
741 put_device(&phy->dev);
742 }
743 EXPORT_SYMBOL(sas_phy_free);
744
745 /**
746 * sas_phy_delete - remove SAS PHY
747 * @phy: SAS PHY to remove
748 *
749 * Removes the specified SAS PHY. If the SAS PHY has an
750 * associated remote PHY it is removed before.
751 */
752 void
sas_phy_delete(struct sas_phy * phy)753 sas_phy_delete(struct sas_phy *phy)
754 {
755 struct device *dev = &phy->dev;
756
757 /* this happens if the phy is still part of a port when deleted */
758 BUG_ON(!list_empty(&phy->port_siblings));
759
760 transport_remove_device(dev);
761 device_del(dev);
762 transport_destroy_device(dev);
763 put_device(dev);
764 }
765 EXPORT_SYMBOL(sas_phy_delete);
766
767 /**
768 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
769 * @dev: device to check
770 *
771 * Returns:
772 * %1 if the device represents a SAS PHY, %0 else
773 */
scsi_is_sas_phy(const struct device * dev)774 int scsi_is_sas_phy(const struct device *dev)
775 {
776 return dev->release == sas_phy_release;
777 }
778 EXPORT_SYMBOL(scsi_is_sas_phy);
779
780 /*
781 * SAS Port attributes
782 */
783 #define sas_port_show_simple(field, name, format_string, cast) \
784 static ssize_t \
785 show_sas_port_##name(struct device *dev, \
786 struct device_attribute *attr, char *buf) \
787 { \
788 struct sas_port *port = transport_class_to_sas_port(dev); \
789 \
790 return snprintf(buf, 20, format_string, cast port->field); \
791 }
792
793 #define sas_port_simple_attr(field, name, format_string, type) \
794 sas_port_show_simple(field, name, format_string, (type)) \
795 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
796
797 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
798
799 static DECLARE_TRANSPORT_CLASS(sas_port_class,
800 "sas_port", NULL, NULL, NULL);
801
sas_port_match(struct attribute_container * cont,struct device * dev)802 static int sas_port_match(struct attribute_container *cont, struct device *dev)
803 {
804 struct Scsi_Host *shost;
805 struct sas_internal *i;
806
807 if (!scsi_is_sas_port(dev))
808 return 0;
809 shost = dev_to_shost(dev->parent);
810
811 if (!shost->transportt)
812 return 0;
813 if (shost->transportt->host_attrs.ac.class !=
814 &sas_host_class.class)
815 return 0;
816
817 i = to_sas_internal(shost->transportt);
818 return &i->port_attr_cont.ac == cont;
819 }
820
821
sas_port_release(struct device * dev)822 static void sas_port_release(struct device *dev)
823 {
824 struct sas_port *port = dev_to_sas_port(dev);
825
826 BUG_ON(!list_empty(&port->phy_list));
827
828 put_device(dev->parent);
829 kfree(port);
830 }
831
sas_port_create_link(struct sas_port * port,struct sas_phy * phy)832 static void sas_port_create_link(struct sas_port *port,
833 struct sas_phy *phy)
834 {
835 int res;
836
837 res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
838 dev_name(&phy->dev));
839 if (res)
840 goto err;
841 res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
842 if (res)
843 goto err;
844 return;
845 err:
846 printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
847 __func__, res);
848 }
849
sas_port_delete_link(struct sas_port * port,struct sas_phy * phy)850 static void sas_port_delete_link(struct sas_port *port,
851 struct sas_phy *phy)
852 {
853 sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
854 sysfs_remove_link(&phy->dev.kobj, "port");
855 }
856
857 /** sas_port_alloc - allocate and initialize a SAS port structure
858 *
859 * @parent: parent device
860 * @port_id: port number
861 *
862 * Allocates a SAS port structure. It will be added to the device tree
863 * below the device specified by @parent which must be either a Scsi_Host
864 * or a sas_expander_device.
865 *
866 * Returns %NULL on error
867 */
sas_port_alloc(struct device * parent,int port_id)868 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
869 {
870 struct Scsi_Host *shost = dev_to_shost(parent);
871 struct sas_port *port;
872
873 port = kzalloc(sizeof(*port), GFP_KERNEL);
874 if (!port)
875 return NULL;
876
877 port->port_identifier = port_id;
878
879 device_initialize(&port->dev);
880
881 port->dev.parent = get_device(parent);
882 port->dev.release = sas_port_release;
883
884 mutex_init(&port->phy_list_mutex);
885 INIT_LIST_HEAD(&port->phy_list);
886
887 if (scsi_is_sas_expander_device(parent)) {
888 struct sas_rphy *rphy = dev_to_rphy(parent);
889 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
890 rphy->scsi_target_id, port->port_identifier);
891 } else
892 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
893 port->port_identifier);
894
895 transport_setup_device(&port->dev);
896
897 return port;
898 }
899 EXPORT_SYMBOL(sas_port_alloc);
900
901 /** sas_port_alloc_num - allocate and initialize a SAS port structure
902 *
903 * @parent: parent device
904 *
905 * Allocates a SAS port structure and a number to go with it. This
906 * interface is really for adapters where the port number has no
907 * meansing, so the sas class should manage them. It will be added to
908 * the device tree below the device specified by @parent which must be
909 * either a Scsi_Host or a sas_expander_device.
910 *
911 * Returns %NULL on error
912 */
sas_port_alloc_num(struct device * parent)913 struct sas_port *sas_port_alloc_num(struct device *parent)
914 {
915 int index;
916 struct Scsi_Host *shost = dev_to_shost(parent);
917 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
918
919 /* FIXME: use idr for this eventually */
920 mutex_lock(&sas_host->lock);
921 if (scsi_is_sas_expander_device(parent)) {
922 struct sas_rphy *rphy = dev_to_rphy(parent);
923 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
924
925 index = exp->next_port_id++;
926 } else
927 index = sas_host->next_port_id++;
928 mutex_unlock(&sas_host->lock);
929 return sas_port_alloc(parent, index);
930 }
931 EXPORT_SYMBOL(sas_port_alloc_num);
932
933 /**
934 * sas_port_add - add a SAS port to the device hierarchy
935 * @port: port to be added
936 *
937 * publishes a port to the rest of the system
938 */
sas_port_add(struct sas_port * port)939 int sas_port_add(struct sas_port *port)
940 {
941 int error;
942
943 /* No phys should be added until this is made visible */
944 BUG_ON(!list_empty(&port->phy_list));
945
946 error = device_add(&port->dev);
947
948 if (error)
949 return error;
950
951 transport_add_device(&port->dev);
952 transport_configure_device(&port->dev);
953
954 return 0;
955 }
956 EXPORT_SYMBOL(sas_port_add);
957
958 /**
959 * sas_port_free - free a SAS PORT
960 * @port: SAS PORT to free
961 *
962 * Frees the specified SAS PORT.
963 *
964 * Note:
965 * This function must only be called on a PORT that has not
966 * successfully been added using sas_port_add().
967 */
sas_port_free(struct sas_port * port)968 void sas_port_free(struct sas_port *port)
969 {
970 transport_destroy_device(&port->dev);
971 put_device(&port->dev);
972 }
973 EXPORT_SYMBOL(sas_port_free);
974
975 /**
976 * sas_port_delete - remove SAS PORT
977 * @port: SAS PORT to remove
978 *
979 * Removes the specified SAS PORT. If the SAS PORT has an
980 * associated phys, unlink them from the port as well.
981 */
sas_port_delete(struct sas_port * port)982 void sas_port_delete(struct sas_port *port)
983 {
984 struct device *dev = &port->dev;
985 struct sas_phy *phy, *tmp_phy;
986
987 if (port->rphy) {
988 sas_rphy_delete(port->rphy);
989 port->rphy = NULL;
990 }
991
992 mutex_lock(&port->phy_list_mutex);
993 list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
994 port_siblings) {
995 sas_port_delete_link(port, phy);
996 list_del_init(&phy->port_siblings);
997 }
998 mutex_unlock(&port->phy_list_mutex);
999
1000 if (port->is_backlink) {
1001 struct device *parent = port->dev.parent;
1002
1003 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1004 port->is_backlink = 0;
1005 }
1006
1007 transport_remove_device(dev);
1008 device_del(dev);
1009 transport_destroy_device(dev);
1010 put_device(dev);
1011 }
1012 EXPORT_SYMBOL(sas_port_delete);
1013
1014 /**
1015 * scsi_is_sas_port - check if a struct device represents a SAS port
1016 * @dev: device to check
1017 *
1018 * Returns:
1019 * %1 if the device represents a SAS Port, %0 else
1020 */
scsi_is_sas_port(const struct device * dev)1021 int scsi_is_sas_port(const struct device *dev)
1022 {
1023 return dev->release == sas_port_release;
1024 }
1025 EXPORT_SYMBOL(scsi_is_sas_port);
1026
1027 /**
1028 * sas_port_get_phy - try to take a reference on a port member
1029 * @port: port to check
1030 */
sas_port_get_phy(struct sas_port * port)1031 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1032 {
1033 struct sas_phy *phy;
1034
1035 mutex_lock(&port->phy_list_mutex);
1036 if (list_empty(&port->phy_list))
1037 phy = NULL;
1038 else {
1039 struct list_head *ent = port->phy_list.next;
1040
1041 phy = list_entry(ent, typeof(*phy), port_siblings);
1042 get_device(&phy->dev);
1043 }
1044 mutex_unlock(&port->phy_list_mutex);
1045
1046 return phy;
1047 }
1048 EXPORT_SYMBOL(sas_port_get_phy);
1049
1050 /**
1051 * sas_port_add_phy - add another phy to a port to form a wide port
1052 * @port: port to add the phy to
1053 * @phy: phy to add
1054 *
1055 * When a port is initially created, it is empty (has no phys). All
1056 * ports must have at least one phy to operated, and all wide ports
1057 * must have at least two. The current code makes no difference
1058 * between ports and wide ports, but the only object that can be
1059 * connected to a remote device is a port, so ports must be formed on
1060 * all devices with phys if they're connected to anything.
1061 */
sas_port_add_phy(struct sas_port * port,struct sas_phy * phy)1062 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1063 {
1064 mutex_lock(&port->phy_list_mutex);
1065 if (unlikely(!list_empty(&phy->port_siblings))) {
1066 /* make sure we're already on this port */
1067 struct sas_phy *tmp;
1068
1069 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1070 if (tmp == phy)
1071 break;
1072 /* If this trips, you added a phy that was already
1073 * part of a different port */
1074 if (unlikely(tmp != phy)) {
1075 dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1076 dev_name(&phy->dev));
1077 BUG();
1078 }
1079 } else {
1080 sas_port_create_link(port, phy);
1081 list_add_tail(&phy->port_siblings, &port->phy_list);
1082 port->num_phys++;
1083 }
1084 mutex_unlock(&port->phy_list_mutex);
1085 }
1086 EXPORT_SYMBOL(sas_port_add_phy);
1087
1088 /**
1089 * sas_port_delete_phy - remove a phy from a port or wide port
1090 * @port: port to remove the phy from
1091 * @phy: phy to remove
1092 *
1093 * This operation is used for tearing down ports again. It must be
1094 * done to every port or wide port before calling sas_port_delete.
1095 */
sas_port_delete_phy(struct sas_port * port,struct sas_phy * phy)1096 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1097 {
1098 mutex_lock(&port->phy_list_mutex);
1099 sas_port_delete_link(port, phy);
1100 list_del_init(&phy->port_siblings);
1101 port->num_phys--;
1102 mutex_unlock(&port->phy_list_mutex);
1103 }
1104 EXPORT_SYMBOL(sas_port_delete_phy);
1105
sas_port_mark_backlink(struct sas_port * port)1106 void sas_port_mark_backlink(struct sas_port *port)
1107 {
1108 int res;
1109 struct device *parent = port->dev.parent->parent->parent;
1110
1111 if (port->is_backlink)
1112 return;
1113 port->is_backlink = 1;
1114 res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1115 dev_name(parent));
1116 if (res)
1117 goto err;
1118 return;
1119 err:
1120 printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1121 __func__, res);
1122
1123 }
1124 EXPORT_SYMBOL(sas_port_mark_backlink);
1125
1126 /*
1127 * SAS remote PHY attributes.
1128 */
1129
1130 #define sas_rphy_show_simple(field, name, format_string, cast) \
1131 static ssize_t \
1132 show_sas_rphy_##name(struct device *dev, \
1133 struct device_attribute *attr, char *buf) \
1134 { \
1135 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1136 \
1137 return snprintf(buf, 20, format_string, cast rphy->field); \
1138 }
1139
1140 #define sas_rphy_simple_attr(field, name, format_string, type) \
1141 sas_rphy_show_simple(field, name, format_string, (type)) \
1142 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1143 show_sas_rphy_##name, NULL)
1144
1145 #define sas_rphy_show_protocol(field, name) \
1146 static ssize_t \
1147 show_sas_rphy_##name(struct device *dev, \
1148 struct device_attribute *attr, char *buf) \
1149 { \
1150 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1151 \
1152 if (!rphy->field) \
1153 return snprintf(buf, 20, "none\n"); \
1154 return get_sas_protocol_names(rphy->field, buf); \
1155 }
1156
1157 #define sas_rphy_protocol_attr(field, name) \
1158 sas_rphy_show_protocol(field, name) \
1159 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1160 show_sas_rphy_##name, NULL)
1161
1162 static ssize_t
show_sas_rphy_device_type(struct device * dev,struct device_attribute * attr,char * buf)1163 show_sas_rphy_device_type(struct device *dev,
1164 struct device_attribute *attr, char *buf)
1165 {
1166 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1167
1168 if (!rphy->identify.device_type)
1169 return snprintf(buf, 20, "none\n");
1170 return get_sas_device_type_names(
1171 rphy->identify.device_type, buf);
1172 }
1173
1174 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1175 show_sas_rphy_device_type, NULL);
1176
1177 static ssize_t
show_sas_rphy_enclosure_identifier(struct device * dev,struct device_attribute * attr,char * buf)1178 show_sas_rphy_enclosure_identifier(struct device *dev,
1179 struct device_attribute *attr, char *buf)
1180 {
1181 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1182 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1183 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1184 struct sas_internal *i = to_sas_internal(shost->transportt);
1185 u64 identifier;
1186 int error;
1187
1188 error = i->f->get_enclosure_identifier(rphy, &identifier);
1189 if (error)
1190 return error;
1191 return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1192 }
1193
1194 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1195 show_sas_rphy_enclosure_identifier, NULL);
1196
1197 static ssize_t
show_sas_rphy_bay_identifier(struct device * dev,struct device_attribute * attr,char * buf)1198 show_sas_rphy_bay_identifier(struct device *dev,
1199 struct device_attribute *attr, char *buf)
1200 {
1201 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1202 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1203 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1204 struct sas_internal *i = to_sas_internal(shost->transportt);
1205 int val;
1206
1207 val = i->f->get_bay_identifier(rphy);
1208 if (val < 0)
1209 return val;
1210 return sprintf(buf, "%d\n", val);
1211 }
1212
1213 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1214 show_sas_rphy_bay_identifier, NULL);
1215
1216 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1217 initiator_port_protocols);
1218 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1219 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1220 unsigned long long);
1221 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1222 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1223
1224 /* only need 8 bytes of data plus header (4 or 8) */
1225 #define BUF_SIZE 64
1226
sas_read_port_mode_page(struct scsi_device * sdev)1227 int sas_read_port_mode_page(struct scsi_device *sdev)
1228 {
1229 char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1230 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1231 struct scsi_mode_data mode_data;
1232 int error;
1233
1234 if (!buffer)
1235 return -ENOMEM;
1236
1237 error = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1238 &mode_data, NULL);
1239
1240 if (error)
1241 goto out;
1242
1243 msdata = buffer + mode_data.header_length +
1244 mode_data.block_descriptor_length;
1245
1246 if (msdata - buffer > BUF_SIZE - 8)
1247 goto out;
1248
1249 error = 0;
1250
1251 rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1252 rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1253 rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1254
1255 out:
1256 kfree(buffer);
1257 return error;
1258 }
1259 EXPORT_SYMBOL(sas_read_port_mode_page);
1260
1261 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1262 "sas_end_device", NULL, NULL, NULL);
1263
1264 #define sas_end_dev_show_simple(field, name, format_string, cast) \
1265 static ssize_t \
1266 show_sas_end_dev_##name(struct device *dev, \
1267 struct device_attribute *attr, char *buf) \
1268 { \
1269 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1270 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1271 \
1272 return snprintf(buf, 20, format_string, cast rdev->field); \
1273 }
1274
1275 #define sas_end_dev_simple_attr(field, name, format_string, type) \
1276 sas_end_dev_show_simple(field, name, format_string, (type)) \
1277 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1278 show_sas_end_dev_##name, NULL)
1279
1280 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1281 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1282 "%d\n", int);
1283 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1284 "%d\n", int);
1285 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1286 "%d\n", int);
1287 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1288 "%d\n", int);
1289
1290 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1291 "sas_expander", NULL, NULL, NULL);
1292
1293 #define sas_expander_show_simple(field, name, format_string, cast) \
1294 static ssize_t \
1295 show_sas_expander_##name(struct device *dev, \
1296 struct device_attribute *attr, char *buf) \
1297 { \
1298 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1299 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1300 \
1301 return snprintf(buf, 20, format_string, cast edev->field); \
1302 }
1303
1304 #define sas_expander_simple_attr(field, name, format_string, type) \
1305 sas_expander_show_simple(field, name, format_string, (type)) \
1306 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1307 show_sas_expander_##name, NULL)
1308
1309 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1310 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1311 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1312 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1313 "%s\n", char *);
1314 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1315 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1316 unsigned int);
1317 sas_expander_simple_attr(level, level, "%d\n", int);
1318
1319 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1320 "sas_device", NULL, NULL, NULL);
1321
sas_rphy_match(struct attribute_container * cont,struct device * dev)1322 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1323 {
1324 struct Scsi_Host *shost;
1325 struct sas_internal *i;
1326
1327 if (!scsi_is_sas_rphy(dev))
1328 return 0;
1329 shost = dev_to_shost(dev->parent->parent);
1330
1331 if (!shost->transportt)
1332 return 0;
1333 if (shost->transportt->host_attrs.ac.class !=
1334 &sas_host_class.class)
1335 return 0;
1336
1337 i = to_sas_internal(shost->transportt);
1338 return &i->rphy_attr_cont.ac == cont;
1339 }
1340
sas_end_dev_match(struct attribute_container * cont,struct device * dev)1341 static int sas_end_dev_match(struct attribute_container *cont,
1342 struct device *dev)
1343 {
1344 struct Scsi_Host *shost;
1345 struct sas_internal *i;
1346 struct sas_rphy *rphy;
1347
1348 if (!scsi_is_sas_rphy(dev))
1349 return 0;
1350 shost = dev_to_shost(dev->parent->parent);
1351 rphy = dev_to_rphy(dev);
1352
1353 if (!shost->transportt)
1354 return 0;
1355 if (shost->transportt->host_attrs.ac.class !=
1356 &sas_host_class.class)
1357 return 0;
1358
1359 i = to_sas_internal(shost->transportt);
1360 return &i->end_dev_attr_cont.ac == cont &&
1361 rphy->identify.device_type == SAS_END_DEVICE;
1362 }
1363
sas_expander_match(struct attribute_container * cont,struct device * dev)1364 static int sas_expander_match(struct attribute_container *cont,
1365 struct device *dev)
1366 {
1367 struct Scsi_Host *shost;
1368 struct sas_internal *i;
1369 struct sas_rphy *rphy;
1370
1371 if (!scsi_is_sas_rphy(dev))
1372 return 0;
1373 shost = dev_to_shost(dev->parent->parent);
1374 rphy = dev_to_rphy(dev);
1375
1376 if (!shost->transportt)
1377 return 0;
1378 if (shost->transportt->host_attrs.ac.class !=
1379 &sas_host_class.class)
1380 return 0;
1381
1382 i = to_sas_internal(shost->transportt);
1383 return &i->expander_attr_cont.ac == cont &&
1384 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1385 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1386 }
1387
sas_expander_release(struct device * dev)1388 static void sas_expander_release(struct device *dev)
1389 {
1390 struct sas_rphy *rphy = dev_to_rphy(dev);
1391 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1392
1393 put_device(dev->parent);
1394 kfree(edev);
1395 }
1396
sas_end_device_release(struct device * dev)1397 static void sas_end_device_release(struct device *dev)
1398 {
1399 struct sas_rphy *rphy = dev_to_rphy(dev);
1400 struct sas_end_device *edev = rphy_to_end_device(rphy);
1401
1402 put_device(dev->parent);
1403 kfree(edev);
1404 }
1405
1406 /**
1407 * sas_rphy_initialize - common rphy initialization
1408 * @rphy: rphy to initialise
1409 *
1410 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1411 * initialise the common rphy component of each.
1412 */
sas_rphy_initialize(struct sas_rphy * rphy)1413 static void sas_rphy_initialize(struct sas_rphy *rphy)
1414 {
1415 INIT_LIST_HEAD(&rphy->list);
1416 }
1417
1418 /**
1419 * sas_end_device_alloc - allocate an rphy for an end device
1420 * @parent: which port
1421 *
1422 * Allocates an SAS remote PHY structure, connected to @parent.
1423 *
1424 * Returns:
1425 * SAS PHY allocated or %NULL if the allocation failed.
1426 */
sas_end_device_alloc(struct sas_port * parent)1427 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1428 {
1429 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1430 struct sas_end_device *rdev;
1431
1432 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1433 if (!rdev) {
1434 return NULL;
1435 }
1436
1437 device_initialize(&rdev->rphy.dev);
1438 rdev->rphy.dev.parent = get_device(&parent->dev);
1439 rdev->rphy.dev.release = sas_end_device_release;
1440 if (scsi_is_sas_expander_device(parent->dev.parent)) {
1441 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1442 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1443 shost->host_no, rphy->scsi_target_id,
1444 parent->port_identifier);
1445 } else
1446 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1447 shost->host_no, parent->port_identifier);
1448 rdev->rphy.identify.device_type = SAS_END_DEVICE;
1449 sas_rphy_initialize(&rdev->rphy);
1450 transport_setup_device(&rdev->rphy.dev);
1451
1452 return &rdev->rphy;
1453 }
1454 EXPORT_SYMBOL(sas_end_device_alloc);
1455
1456 /**
1457 * sas_expander_alloc - allocate an rphy for an end device
1458 * @parent: which port
1459 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1460 *
1461 * Allocates an SAS remote PHY structure, connected to @parent.
1462 *
1463 * Returns:
1464 * SAS PHY allocated or %NULL if the allocation failed.
1465 */
sas_expander_alloc(struct sas_port * parent,enum sas_device_type type)1466 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1467 enum sas_device_type type)
1468 {
1469 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1470 struct sas_expander_device *rdev;
1471 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1472
1473 BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1474 type != SAS_FANOUT_EXPANDER_DEVICE);
1475
1476 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1477 if (!rdev) {
1478 return NULL;
1479 }
1480
1481 device_initialize(&rdev->rphy.dev);
1482 rdev->rphy.dev.parent = get_device(&parent->dev);
1483 rdev->rphy.dev.release = sas_expander_release;
1484 mutex_lock(&sas_host->lock);
1485 rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1486 mutex_unlock(&sas_host->lock);
1487 dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1488 shost->host_no, rdev->rphy.scsi_target_id);
1489 rdev->rphy.identify.device_type = type;
1490 sas_rphy_initialize(&rdev->rphy);
1491 transport_setup_device(&rdev->rphy.dev);
1492
1493 return &rdev->rphy;
1494 }
1495 EXPORT_SYMBOL(sas_expander_alloc);
1496
1497 /**
1498 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
1499 * @rphy: The remote PHY to be added
1500 *
1501 * Publishes a SAS remote PHY to the rest of the system.
1502 */
sas_rphy_add(struct sas_rphy * rphy)1503 int sas_rphy_add(struct sas_rphy *rphy)
1504 {
1505 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1506 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1507 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1508 struct sas_identify *identify = &rphy->identify;
1509 int error;
1510
1511 if (parent->rphy)
1512 return -ENXIO;
1513 parent->rphy = rphy;
1514
1515 error = device_add(&rphy->dev);
1516 if (error)
1517 return error;
1518 transport_add_device(&rphy->dev);
1519 transport_configure_device(&rphy->dev);
1520 if (sas_bsg_initialize(shost, rphy))
1521 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1522
1523
1524 mutex_lock(&sas_host->lock);
1525 list_add_tail(&rphy->list, &sas_host->rphy_list);
1526 if (identify->device_type == SAS_END_DEVICE &&
1527 (identify->target_port_protocols &
1528 (SAS_PROTOCOL_SSP | SAS_PROTOCOL_STP | SAS_PROTOCOL_SATA)))
1529 rphy->scsi_target_id = sas_host->next_target_id++;
1530 else if (identify->device_type == SAS_END_DEVICE)
1531 rphy->scsi_target_id = -1;
1532 mutex_unlock(&sas_host->lock);
1533
1534 if (identify->device_type == SAS_END_DEVICE &&
1535 rphy->scsi_target_id != -1) {
1536 int lun;
1537
1538 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1539 lun = SCAN_WILD_CARD;
1540 else
1541 lun = 0;
1542
1543 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1544 SCSI_SCAN_INITIAL);
1545 }
1546
1547 return 0;
1548 }
1549 EXPORT_SYMBOL(sas_rphy_add);
1550
1551 /**
1552 * sas_rphy_free - free a SAS remote PHY
1553 * @rphy: SAS remote PHY to free
1554 *
1555 * Frees the specified SAS remote PHY.
1556 *
1557 * Note:
1558 * This function must only be called on a remote
1559 * PHY that has not successfully been added using
1560 * sas_rphy_add() (or has been sas_rphy_remove()'d)
1561 */
sas_rphy_free(struct sas_rphy * rphy)1562 void sas_rphy_free(struct sas_rphy *rphy)
1563 {
1564 struct device *dev = &rphy->dev;
1565 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1566 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1567
1568 mutex_lock(&sas_host->lock);
1569 list_del(&rphy->list);
1570 mutex_unlock(&sas_host->lock);
1571
1572 transport_destroy_device(dev);
1573
1574 put_device(dev);
1575 }
1576 EXPORT_SYMBOL(sas_rphy_free);
1577
1578 /**
1579 * sas_rphy_delete - remove and free SAS remote PHY
1580 * @rphy: SAS remote PHY to remove and free
1581 *
1582 * Removes the specified SAS remote PHY and frees it.
1583 */
1584 void
sas_rphy_delete(struct sas_rphy * rphy)1585 sas_rphy_delete(struct sas_rphy *rphy)
1586 {
1587 sas_rphy_remove(rphy);
1588 sas_rphy_free(rphy);
1589 }
1590 EXPORT_SYMBOL(sas_rphy_delete);
1591
1592 /**
1593 * sas_rphy_unlink - unlink SAS remote PHY
1594 * @rphy: SAS remote phy to unlink from its parent port
1595 *
1596 * Removes port reference to an rphy
1597 */
sas_rphy_unlink(struct sas_rphy * rphy)1598 void sas_rphy_unlink(struct sas_rphy *rphy)
1599 {
1600 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1601
1602 parent->rphy = NULL;
1603 }
1604 EXPORT_SYMBOL(sas_rphy_unlink);
1605
1606 /**
1607 * sas_rphy_remove - remove SAS remote PHY
1608 * @rphy: SAS remote phy to remove
1609 *
1610 * Removes the specified SAS remote PHY.
1611 */
1612 void
sas_rphy_remove(struct sas_rphy * rphy)1613 sas_rphy_remove(struct sas_rphy *rphy)
1614 {
1615 struct device *dev = &rphy->dev;
1616
1617 switch (rphy->identify.device_type) {
1618 case SAS_END_DEVICE:
1619 scsi_remove_target(dev);
1620 break;
1621 case SAS_EDGE_EXPANDER_DEVICE:
1622 case SAS_FANOUT_EXPANDER_DEVICE:
1623 sas_remove_children(dev);
1624 break;
1625 default:
1626 break;
1627 }
1628
1629 sas_rphy_unlink(rphy);
1630 bsg_remove_queue(rphy->q);
1631 transport_remove_device(dev);
1632 device_del(dev);
1633 }
1634 EXPORT_SYMBOL(sas_rphy_remove);
1635
1636 /**
1637 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1638 * @dev: device to check
1639 *
1640 * Returns:
1641 * %1 if the device represents a SAS remote PHY, %0 else
1642 */
scsi_is_sas_rphy(const struct device * dev)1643 int scsi_is_sas_rphy(const struct device *dev)
1644 {
1645 return dev->release == sas_end_device_release ||
1646 dev->release == sas_expander_release;
1647 }
1648 EXPORT_SYMBOL(scsi_is_sas_rphy);
1649
1650
1651 /*
1652 * SCSI scan helper
1653 */
1654
sas_user_scan(struct Scsi_Host * shost,uint channel,uint id,u64 lun)1655 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1656 uint id, u64 lun)
1657 {
1658 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1659 struct sas_rphy *rphy;
1660
1661 mutex_lock(&sas_host->lock);
1662 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1663 if (rphy->identify.device_type != SAS_END_DEVICE ||
1664 rphy->scsi_target_id == -1)
1665 continue;
1666
1667 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1668 (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1669 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1670 lun, SCSI_SCAN_MANUAL);
1671 }
1672 }
1673 mutex_unlock(&sas_host->lock);
1674
1675 return 0;
1676 }
1677
1678
1679 /*
1680 * Setup / Teardown code
1681 */
1682
1683 #define SETUP_TEMPLATE(attrb, field, perm, test) \
1684 i->private_##attrb[count] = dev_attr_##field; \
1685 i->private_##attrb[count].attr.mode = perm; \
1686 i->attrb[count] = &i->private_##attrb[count]; \
1687 if (test) \
1688 count++
1689
1690 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1691 i->private_##attrb[count] = dev_attr_##field; \
1692 i->private_##attrb[count].attr.mode = perm; \
1693 if (ro_test) { \
1694 i->private_##attrb[count].attr.mode = ro_perm; \
1695 i->private_##attrb[count].store = NULL; \
1696 } \
1697 i->attrb[count] = &i->private_##attrb[count]; \
1698 if (test) \
1699 count++
1700
1701 #define SETUP_RPORT_ATTRIBUTE(field) \
1702 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1703
1704 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1705 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1706
1707 #define SETUP_PHY_ATTRIBUTE(field) \
1708 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1709
1710 #define SETUP_PHY_ATTRIBUTE_RW(field) \
1711 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1712 !i->f->set_phy_speed, S_IRUGO)
1713
1714 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1715 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1716 !i->f->func, S_IRUGO)
1717
1718 #define SETUP_PORT_ATTRIBUTE(field) \
1719 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1720
1721 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1722 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1723
1724 #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1725 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1726
1727 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1728 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1729
1730 #define SETUP_END_DEV_ATTRIBUTE(field) \
1731 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1732
1733 #define SETUP_EXPANDER_ATTRIBUTE(field) \
1734 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1735
1736 /**
1737 * sas_attach_transport - instantiate SAS transport template
1738 * @ft: SAS transport class function template
1739 */
1740 struct scsi_transport_template *
sas_attach_transport(struct sas_function_template * ft)1741 sas_attach_transport(struct sas_function_template *ft)
1742 {
1743 struct sas_internal *i;
1744 int count;
1745
1746 i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1747 if (!i)
1748 return NULL;
1749
1750 i->t.user_scan = sas_user_scan;
1751
1752 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1753 i->t.host_attrs.ac.class = &sas_host_class.class;
1754 i->t.host_attrs.ac.match = sas_host_match;
1755 transport_container_register(&i->t.host_attrs);
1756 i->t.host_size = sizeof(struct sas_host_attrs);
1757
1758 i->phy_attr_cont.ac.class = &sas_phy_class.class;
1759 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1760 i->phy_attr_cont.ac.match = sas_phy_match;
1761 transport_container_register(&i->phy_attr_cont);
1762
1763 i->port_attr_cont.ac.class = &sas_port_class.class;
1764 i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1765 i->port_attr_cont.ac.match = sas_port_match;
1766 transport_container_register(&i->port_attr_cont);
1767
1768 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1769 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1770 i->rphy_attr_cont.ac.match = sas_rphy_match;
1771 transport_container_register(&i->rphy_attr_cont);
1772
1773 i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1774 i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1775 i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1776 transport_container_register(&i->end_dev_attr_cont);
1777
1778 i->expander_attr_cont.ac.class = &sas_expander_class.class;
1779 i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1780 i->expander_attr_cont.ac.match = sas_expander_match;
1781 transport_container_register(&i->expander_attr_cont);
1782
1783 i->f = ft;
1784
1785 count = 0;
1786 SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1787 SETUP_PHY_ATTRIBUTE(target_port_protocols);
1788 SETUP_PHY_ATTRIBUTE(device_type);
1789 SETUP_PHY_ATTRIBUTE(sas_address);
1790 SETUP_PHY_ATTRIBUTE(phy_identifier);
1791 SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1792 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1793 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1794 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1795 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1796
1797 SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1798 SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1799 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1800 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1801 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1802 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1803 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1804 i->phy_attrs[count] = NULL;
1805
1806 count = 0;
1807 SETUP_PORT_ATTRIBUTE(num_phys);
1808 i->port_attrs[count] = NULL;
1809
1810 count = 0;
1811 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1812 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1813 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1814 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1815 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1816 SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1817 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1818 get_enclosure_identifier);
1819 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1820 get_bay_identifier);
1821 i->rphy_attrs[count] = NULL;
1822
1823 count = 0;
1824 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1825 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1826 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1827 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1828 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1829 i->end_dev_attrs[count] = NULL;
1830
1831 count = 0;
1832 SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1833 SETUP_EXPANDER_ATTRIBUTE(product_id);
1834 SETUP_EXPANDER_ATTRIBUTE(product_rev);
1835 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1836 SETUP_EXPANDER_ATTRIBUTE(component_id);
1837 SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1838 SETUP_EXPANDER_ATTRIBUTE(level);
1839 i->expander_attrs[count] = NULL;
1840
1841 return &i->t;
1842 }
1843 EXPORT_SYMBOL(sas_attach_transport);
1844
1845 /**
1846 * sas_release_transport - release SAS transport template instance
1847 * @t: transport template instance
1848 */
sas_release_transport(struct scsi_transport_template * t)1849 void sas_release_transport(struct scsi_transport_template *t)
1850 {
1851 struct sas_internal *i = to_sas_internal(t);
1852
1853 transport_container_unregister(&i->t.host_attrs);
1854 transport_container_unregister(&i->phy_attr_cont);
1855 transport_container_unregister(&i->port_attr_cont);
1856 transport_container_unregister(&i->rphy_attr_cont);
1857 transport_container_unregister(&i->end_dev_attr_cont);
1858 transport_container_unregister(&i->expander_attr_cont);
1859
1860 kfree(i);
1861 }
1862 EXPORT_SYMBOL(sas_release_transport);
1863
sas_transport_init(void)1864 static __init int sas_transport_init(void)
1865 {
1866 int error;
1867
1868 error = transport_class_register(&sas_host_class);
1869 if (error)
1870 goto out;
1871 error = transport_class_register(&sas_phy_class);
1872 if (error)
1873 goto out_unregister_transport;
1874 error = transport_class_register(&sas_port_class);
1875 if (error)
1876 goto out_unregister_phy;
1877 error = transport_class_register(&sas_rphy_class);
1878 if (error)
1879 goto out_unregister_port;
1880 error = transport_class_register(&sas_end_dev_class);
1881 if (error)
1882 goto out_unregister_rphy;
1883 error = transport_class_register(&sas_expander_class);
1884 if (error)
1885 goto out_unregister_end_dev;
1886
1887 return 0;
1888
1889 out_unregister_end_dev:
1890 transport_class_unregister(&sas_end_dev_class);
1891 out_unregister_rphy:
1892 transport_class_unregister(&sas_rphy_class);
1893 out_unregister_port:
1894 transport_class_unregister(&sas_port_class);
1895 out_unregister_phy:
1896 transport_class_unregister(&sas_phy_class);
1897 out_unregister_transport:
1898 transport_class_unregister(&sas_host_class);
1899 out:
1900 return error;
1901
1902 }
1903
sas_transport_exit(void)1904 static void __exit sas_transport_exit(void)
1905 {
1906 transport_class_unregister(&sas_host_class);
1907 transport_class_unregister(&sas_phy_class);
1908 transport_class_unregister(&sas_port_class);
1909 transport_class_unregister(&sas_rphy_class);
1910 transport_class_unregister(&sas_end_dev_class);
1911 transport_class_unregister(&sas_expander_class);
1912 }
1913
1914 MODULE_AUTHOR("Christoph Hellwig");
1915 MODULE_DESCRIPTION("SAS Transport Attributes");
1916 MODULE_LICENSE("GPL");
1917
1918 module_init(sas_transport_init);
1919 module_exit(sas_transport_exit);
1920