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Merge tag 'trace-fixes-v4.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / scsi / scsi_transport_sas.c
1 /*
2 * Copyright (C) 2005-2006 Dell Inc.
3 * Released under GPL v2.
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_device.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_sas.h>
40
41 #include "scsi_sas_internal.h"
42 struct sas_host_attrs {
43 struct list_head rphy_list;
44 struct mutex lock;
45 struct request_queue *q;
46 u32 next_target_id;
47 u32 next_expander_id;
48 int next_port_id;
49 };
50 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
51
52
53 /*
54 * Hack to allow attributes of the same name in different objects.
55 */
56 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
57 struct device_attribute dev_attr_##_prefix##_##_name = \
58 __ATTR(_name,_mode,_show,_store)
59
60
61 /*
62 * Pretty printing helpers
63 */
64
65 #define sas_bitfield_name_match(title, table) \
66 static ssize_t \
67 get_sas_##title##_names(u32 table_key, char *buf) \
68 { \
69 char *prefix = ""; \
70 ssize_t len = 0; \
71 int i; \
72 \
73 for (i = 0; i < ARRAY_SIZE(table); i++) { \
74 if (table[i].value & table_key) { \
75 len += sprintf(buf + len, "%s%s", \
76 prefix, table[i].name); \
77 prefix = ", "; \
78 } \
79 } \
80 len += sprintf(buf + len, "\n"); \
81 return len; \
82 }
83
84 #define sas_bitfield_name_set(title, table) \
85 static ssize_t \
86 set_sas_##title##_names(u32 *table_key, const char *buf) \
87 { \
88 ssize_t len = 0; \
89 int i; \
90 \
91 for (i = 0; i < ARRAY_SIZE(table); i++) { \
92 len = strlen(table[i].name); \
93 if (strncmp(buf, table[i].name, len) == 0 && \
94 (buf[len] == '\n' || buf[len] == '\0')) { \
95 *table_key = table[i].value; \
96 return 0; \
97 } \
98 } \
99 return -EINVAL; \
100 }
101
102 #define sas_bitfield_name_search(title, table) \
103 static ssize_t \
104 get_sas_##title##_names(u32 table_key, char *buf) \
105 { \
106 ssize_t len = 0; \
107 int i; \
108 \
109 for (i = 0; i < ARRAY_SIZE(table); i++) { \
110 if (table[i].value == table_key) { \
111 len += sprintf(buf + len, "%s", \
112 table[i].name); \
113 break; \
114 } \
115 } \
116 len += sprintf(buf + len, "\n"); \
117 return len; \
118 }
119
120 static struct {
121 u32 value;
122 char *name;
123 } sas_device_type_names[] = {
124 { SAS_PHY_UNUSED, "unused" },
125 { SAS_END_DEVICE, "end device" },
126 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
127 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
128 };
129 sas_bitfield_name_search(device_type, sas_device_type_names)
130
131
132 static struct {
133 u32 value;
134 char *name;
135 } sas_protocol_names[] = {
136 { SAS_PROTOCOL_SATA, "sata" },
137 { SAS_PROTOCOL_SMP, "smp" },
138 { SAS_PROTOCOL_STP, "stp" },
139 { SAS_PROTOCOL_SSP, "ssp" },
140 };
141 sas_bitfield_name_match(protocol, sas_protocol_names)
142
143 static struct {
144 u32 value;
145 char *name;
146 } sas_linkspeed_names[] = {
147 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
148 { SAS_PHY_DISABLED, "Phy disabled" },
149 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
150 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
151 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
152 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
153 { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
154 { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
155 };
156 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
157 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
158
159 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
160 {
161 struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
162 struct sas_end_device *rdev;
163
164 BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
165
166 rdev = rphy_to_end_device(rphy);
167 return rdev;
168 }
169
170 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
171 struct sas_rphy *rphy)
172 {
173 struct request *req;
174 int ret;
175 int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
176
177 while ((req = blk_fetch_request(q)) != NULL) {
178 spin_unlock_irq(q->queue_lock);
179
180 handler = to_sas_internal(shost->transportt)->f->smp_handler;
181 ret = handler(shost, rphy, req);
182 req->errors = ret;
183
184 blk_end_request_all(req, ret);
185
186 spin_lock_irq(q->queue_lock);
187 }
188 }
189
190 static void sas_host_smp_request(struct request_queue *q)
191 {
192 sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
193 }
194
195 static void sas_non_host_smp_request(struct request_queue *q)
196 {
197 struct sas_rphy *rphy = q->queuedata;
198 sas_smp_request(q, rphy_to_shost(rphy), rphy);
199 }
200
201 static void sas_host_release(struct device *dev)
202 {
203 struct Scsi_Host *shost = dev_to_shost(dev);
204 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
205 struct request_queue *q = sas_host->q;
206
207 if (q)
208 blk_cleanup_queue(q);
209 }
210
211 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
212 {
213 struct request_queue *q;
214 int error;
215 struct device *dev;
216 char namebuf[20];
217 const char *name;
218 void (*release)(struct device *);
219
220 if (!to_sas_internal(shost->transportt)->f->smp_handler) {
221 printk("%s can't handle SMP requests\n", shost->hostt->name);
222 return 0;
223 }
224
225 if (rphy) {
226 q = blk_init_queue(sas_non_host_smp_request, NULL);
227 dev = &rphy->dev;
228 name = dev_name(dev);
229 release = NULL;
230 } else {
231 q = blk_init_queue(sas_host_smp_request, NULL);
232 dev = &shost->shost_gendev;
233 snprintf(namebuf, sizeof(namebuf),
234 "sas_host%d", shost->host_no);
235 name = namebuf;
236 release = sas_host_release;
237 }
238 if (!q)
239 return -ENOMEM;
240
241 error = bsg_register_queue(q, dev, name, release);
242 if (error) {
243 blk_cleanup_queue(q);
244 return -ENOMEM;
245 }
246
247 if (rphy)
248 rphy->q = q;
249 else
250 to_sas_host_attrs(shost)->q = q;
251
252 if (rphy)
253 q->queuedata = rphy;
254 else
255 q->queuedata = shost;
256
257 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
258 return 0;
259 }
260
261 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
262 {
263 struct request_queue *q;
264
265 if (rphy)
266 q = rphy->q;
267 else
268 q = to_sas_host_attrs(shost)->q;
269
270 if (!q)
271 return;
272
273 bsg_unregister_queue(q);
274 }
275
276 /*
277 * SAS host attributes
278 */
279
280 static int sas_host_setup(struct transport_container *tc, struct device *dev,
281 struct device *cdev)
282 {
283 struct Scsi_Host *shost = dev_to_shost(dev);
284 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
285
286 INIT_LIST_HEAD(&sas_host->rphy_list);
287 mutex_init(&sas_host->lock);
288 sas_host->next_target_id = 0;
289 sas_host->next_expander_id = 0;
290 sas_host->next_port_id = 0;
291
292 if (sas_bsg_initialize(shost, NULL))
293 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
294 shost->host_no);
295
296 return 0;
297 }
298
299 static int sas_host_remove(struct transport_container *tc, struct device *dev,
300 struct device *cdev)
301 {
302 struct Scsi_Host *shost = dev_to_shost(dev);
303
304 sas_bsg_remove(shost, NULL);
305
306 return 0;
307 }
308
309 static DECLARE_TRANSPORT_CLASS(sas_host_class,
310 "sas_host", sas_host_setup, sas_host_remove, NULL);
311
312 static int sas_host_match(struct attribute_container *cont,
313 struct device *dev)
314 {
315 struct Scsi_Host *shost;
316 struct sas_internal *i;
317
318 if (!scsi_is_host_device(dev))
319 return 0;
320 shost = dev_to_shost(dev);
321
322 if (!shost->transportt)
323 return 0;
324 if (shost->transportt->host_attrs.ac.class !=
325 &sas_host_class.class)
326 return 0;
327
328 i = to_sas_internal(shost->transportt);
329 return &i->t.host_attrs.ac == cont;
330 }
331
332 static int do_sas_phy_delete(struct device *dev, void *data)
333 {
334 int pass = (int)(unsigned long)data;
335
336 if (pass == 0 && scsi_is_sas_port(dev))
337 sas_port_delete(dev_to_sas_port(dev));
338 else if (pass == 1 && scsi_is_sas_phy(dev))
339 sas_phy_delete(dev_to_phy(dev));
340 return 0;
341 }
342
343 /**
344 * is_sas_attached - check if device is SAS attached
345 * @sdev: scsi device to check
346 *
347 * returns true if the device is SAS attached
348 */
349 int is_sas_attached(struct scsi_device *sdev)
350 {
351 struct Scsi_Host *shost = sdev->host;
352
353 return shost->transportt->host_attrs.ac.class ==
354 &sas_host_class.class;
355 }
356 EXPORT_SYMBOL(is_sas_attached);
357
358
359 /**
360 * sas_remove_children - tear down a devices SAS data structures
361 * @dev: device belonging to the sas object
362 *
363 * Removes all SAS PHYs and remote PHYs for a given object
364 */
365 void sas_remove_children(struct device *dev)
366 {
367 device_for_each_child(dev, (void *)0, do_sas_phy_delete);
368 device_for_each_child(dev, (void *)1, do_sas_phy_delete);
369 }
370 EXPORT_SYMBOL(sas_remove_children);
371
372 /**
373 * sas_remove_host - tear down a Scsi_Host's SAS data structures
374 * @shost: Scsi Host that is torn down
375 *
376 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
377 * Must be called just before scsi_remove_host for SAS HBAs.
378 */
379 void sas_remove_host(struct Scsi_Host *shost)
380 {
381 sas_remove_children(&shost->shost_gendev);
382 }
383 EXPORT_SYMBOL(sas_remove_host);
384
385 /**
386 * sas_get_address - return the SAS address of the device
387 * @sdev: scsi device
388 *
389 * Returns the SAS address of the scsi device
390 */
391 u64 sas_get_address(struct scsi_device *sdev)
392 {
393 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
394
395 return rdev->rphy.identify.sas_address;
396 }
397 EXPORT_SYMBOL(sas_get_address);
398
399 /**
400 * sas_tlr_supported - checking TLR bit in vpd 0x90
401 * @sdev: scsi device struct
402 *
403 * Check Transport Layer Retries are supported or not.
404 * If vpd page 0x90 is present, TRL is supported.
405 *
406 */
407 unsigned int
408 sas_tlr_supported(struct scsi_device *sdev)
409 {
410 const int vpd_len = 32;
411 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
412 char *buffer = kzalloc(vpd_len, GFP_KERNEL);
413 int ret = 0;
414
415 if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
416 goto out;
417
418 /*
419 * Magic numbers: the VPD Protocol page (0x90)
420 * has a 4 byte header and then one entry per device port
421 * the TLR bit is at offset 8 on each port entry
422 * if we take the first port, that's at total offset 12
423 */
424 ret = buffer[12] & 0x01;
425
426 out:
427 kfree(buffer);
428 rdev->tlr_supported = ret;
429 return ret;
430
431 }
432 EXPORT_SYMBOL_GPL(sas_tlr_supported);
433
434 /**
435 * sas_disable_tlr - setting TLR flags
436 * @sdev: scsi device struct
437 *
438 * Seting tlr_enabled flag to 0.
439 *
440 */
441 void
442 sas_disable_tlr(struct scsi_device *sdev)
443 {
444 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
445
446 rdev->tlr_enabled = 0;
447 }
448 EXPORT_SYMBOL_GPL(sas_disable_tlr);
449
450 /**
451 * sas_enable_tlr - setting TLR flags
452 * @sdev: scsi device struct
453 *
454 * Seting tlr_enabled flag 1.
455 *
456 */
457 void sas_enable_tlr(struct scsi_device *sdev)
458 {
459 unsigned int tlr_supported = 0;
460 tlr_supported = sas_tlr_supported(sdev);
461
462 if (tlr_supported) {
463 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
464
465 rdev->tlr_enabled = 1;
466 }
467
468 return;
469 }
470 EXPORT_SYMBOL_GPL(sas_enable_tlr);
471
472 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
473 {
474 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
475 return rdev->tlr_enabled;
476 }
477 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
478
479 /*
480 * SAS Phy attributes
481 */
482
483 #define sas_phy_show_simple(field, name, format_string, cast) \
484 static ssize_t \
485 show_sas_phy_##name(struct device *dev, \
486 struct device_attribute *attr, char *buf) \
487 { \
488 struct sas_phy *phy = transport_class_to_phy(dev); \
489 \
490 return snprintf(buf, 20, format_string, cast phy->field); \
491 }
492
493 #define sas_phy_simple_attr(field, name, format_string, type) \
494 sas_phy_show_simple(field, name, format_string, (type)) \
495 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
496
497 #define sas_phy_show_protocol(field, name) \
498 static ssize_t \
499 show_sas_phy_##name(struct device *dev, \
500 struct device_attribute *attr, char *buf) \
501 { \
502 struct sas_phy *phy = transport_class_to_phy(dev); \
503 \
504 if (!phy->field) \
505 return snprintf(buf, 20, "none\n"); \
506 return get_sas_protocol_names(phy->field, buf); \
507 }
508
509 #define sas_phy_protocol_attr(field, name) \
510 sas_phy_show_protocol(field, name) \
511 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
512
513 #define sas_phy_show_linkspeed(field) \
514 static ssize_t \
515 show_sas_phy_##field(struct device *dev, \
516 struct device_attribute *attr, char *buf) \
517 { \
518 struct sas_phy *phy = transport_class_to_phy(dev); \
519 \
520 return get_sas_linkspeed_names(phy->field, buf); \
521 }
522
523 /* Fudge to tell if we're minimum or maximum */
524 #define sas_phy_store_linkspeed(field) \
525 static ssize_t \
526 store_sas_phy_##field(struct device *dev, \
527 struct device_attribute *attr, \
528 const char *buf, size_t count) \
529 { \
530 struct sas_phy *phy = transport_class_to_phy(dev); \
531 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
532 struct sas_internal *i = to_sas_internal(shost->transportt); \
533 u32 value; \
534 struct sas_phy_linkrates rates = {0}; \
535 int error; \
536 \
537 error = set_sas_linkspeed_names(&value, buf); \
538 if (error) \
539 return error; \
540 rates.field = value; \
541 error = i->f->set_phy_speed(phy, &rates); \
542 \
543 return error ? error : count; \
544 }
545
546 #define sas_phy_linkspeed_rw_attr(field) \
547 sas_phy_show_linkspeed(field) \
548 sas_phy_store_linkspeed(field) \
549 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
550 store_sas_phy_##field)
551
552 #define sas_phy_linkspeed_attr(field) \
553 sas_phy_show_linkspeed(field) \
554 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
555
556
557 #define sas_phy_show_linkerror(field) \
558 static ssize_t \
559 show_sas_phy_##field(struct device *dev, \
560 struct device_attribute *attr, char *buf) \
561 { \
562 struct sas_phy *phy = transport_class_to_phy(dev); \
563 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
564 struct sas_internal *i = to_sas_internal(shost->transportt); \
565 int error; \
566 \
567 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
568 if (error) \
569 return error; \
570 return snprintf(buf, 20, "%u\n", phy->field); \
571 }
572
573 #define sas_phy_linkerror_attr(field) \
574 sas_phy_show_linkerror(field) \
575 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
576
577
578 static ssize_t
579 show_sas_device_type(struct device *dev,
580 struct device_attribute *attr, char *buf)
581 {
582 struct sas_phy *phy = transport_class_to_phy(dev);
583
584 if (!phy->identify.device_type)
585 return snprintf(buf, 20, "none\n");
586 return get_sas_device_type_names(phy->identify.device_type, buf);
587 }
588 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
589
590 static ssize_t do_sas_phy_enable(struct device *dev,
591 size_t count, int enable)
592 {
593 struct sas_phy *phy = transport_class_to_phy(dev);
594 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
595 struct sas_internal *i = to_sas_internal(shost->transportt);
596 int error;
597
598 error = i->f->phy_enable(phy, enable);
599 if (error)
600 return error;
601 phy->enabled = enable;
602 return count;
603 };
604
605 static ssize_t
606 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
607 const char *buf, size_t count)
608 {
609 if (count < 1)
610 return -EINVAL;
611
612 switch (buf[0]) {
613 case '0':
614 do_sas_phy_enable(dev, count, 0);
615 break;
616 case '1':
617 do_sas_phy_enable(dev, count, 1);
618 break;
619 default:
620 return -EINVAL;
621 }
622
623 return count;
624 }
625
626 static ssize_t
627 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
628 char *buf)
629 {
630 struct sas_phy *phy = transport_class_to_phy(dev);
631
632 return snprintf(buf, 20, "%d", phy->enabled);
633 }
634
635 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
636 store_sas_phy_enable);
637
638 static ssize_t
639 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
640 {
641 struct sas_phy *phy = transport_class_to_phy(dev);
642 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
643 struct sas_internal *i = to_sas_internal(shost->transportt);
644 int error;
645
646 error = i->f->phy_reset(phy, hard_reset);
647 if (error)
648 return error;
649 phy->enabled = 1;
650 return count;
651 };
652
653 static ssize_t
654 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
655 const char *buf, size_t count)
656 {
657 return do_sas_phy_reset(dev, count, 0);
658 }
659 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
660
661 static ssize_t
662 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
663 const char *buf, size_t count)
664 {
665 return do_sas_phy_reset(dev, count, 1);
666 }
667 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
668
669 sas_phy_protocol_attr(identify.initiator_port_protocols,
670 initiator_port_protocols);
671 sas_phy_protocol_attr(identify.target_port_protocols,
672 target_port_protocols);
673 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
674 unsigned long long);
675 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
676 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
677 sas_phy_linkspeed_attr(negotiated_linkrate);
678 sas_phy_linkspeed_attr(minimum_linkrate_hw);
679 sas_phy_linkspeed_rw_attr(minimum_linkrate);
680 sas_phy_linkspeed_attr(maximum_linkrate_hw);
681 sas_phy_linkspeed_rw_attr(maximum_linkrate);
682 sas_phy_linkerror_attr(invalid_dword_count);
683 sas_phy_linkerror_attr(running_disparity_error_count);
684 sas_phy_linkerror_attr(loss_of_dword_sync_count);
685 sas_phy_linkerror_attr(phy_reset_problem_count);
686
687 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
688 struct device *cdev)
689 {
690 struct sas_phy *phy = dev_to_phy(dev);
691 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
692 struct sas_internal *i = to_sas_internal(shost->transportt);
693
694 if (i->f->phy_setup)
695 i->f->phy_setup(phy);
696
697 return 0;
698 }
699
700 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
701 "sas_phy", sas_phy_setup, NULL, NULL);
702
703 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
704 {
705 struct Scsi_Host *shost;
706 struct sas_internal *i;
707
708 if (!scsi_is_sas_phy(dev))
709 return 0;
710 shost = dev_to_shost(dev->parent);
711
712 if (!shost->transportt)
713 return 0;
714 if (shost->transportt->host_attrs.ac.class !=
715 &sas_host_class.class)
716 return 0;
717
718 i = to_sas_internal(shost->transportt);
719 return &i->phy_attr_cont.ac == cont;
720 }
721
722 static void sas_phy_release(struct device *dev)
723 {
724 struct sas_phy *phy = dev_to_phy(dev);
725 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
726 struct sas_internal *i = to_sas_internal(shost->transportt);
727
728 if (i->f->phy_release)
729 i->f->phy_release(phy);
730 put_device(dev->parent);
731 kfree(phy);
732 }
733
734 /**
735 * sas_phy_alloc - allocates and initialize a SAS PHY structure
736 * @parent: Parent device
737 * @number: Phy index
738 *
739 * Allocates an SAS PHY structure. It will be added in the device tree
740 * below the device specified by @parent, which has to be either a Scsi_Host
741 * or sas_rphy.
742 *
743 * Returns:
744 * SAS PHY allocated or %NULL if the allocation failed.
745 */
746 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
747 {
748 struct Scsi_Host *shost = dev_to_shost(parent);
749 struct sas_phy *phy;
750
751 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
752 if (!phy)
753 return NULL;
754
755 phy->number = number;
756 phy->enabled = 1;
757
758 device_initialize(&phy->dev);
759 phy->dev.parent = get_device(parent);
760 phy->dev.release = sas_phy_release;
761 INIT_LIST_HEAD(&phy->port_siblings);
762 if (scsi_is_sas_expander_device(parent)) {
763 struct sas_rphy *rphy = dev_to_rphy(parent);
764 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
765 rphy->scsi_target_id, number);
766 } else
767 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
768
769 transport_setup_device(&phy->dev);
770
771 return phy;
772 }
773 EXPORT_SYMBOL(sas_phy_alloc);
774
775 /**
776 * sas_phy_add - add a SAS PHY to the device hierarchy
777 * @phy: The PHY to be added
778 *
779 * Publishes a SAS PHY to the rest of the system.
780 */
781 int sas_phy_add(struct sas_phy *phy)
782 {
783 int error;
784
785 error = device_add(&phy->dev);
786 if (!error) {
787 transport_add_device(&phy->dev);
788 transport_configure_device(&phy->dev);
789 }
790
791 return error;
792 }
793 EXPORT_SYMBOL(sas_phy_add);
794
795 /**
796 * sas_phy_free - free a SAS PHY
797 * @phy: SAS PHY to free
798 *
799 * Frees the specified SAS PHY.
800 *
801 * Note:
802 * This function must only be called on a PHY that has not
803 * successfully been added using sas_phy_add().
804 */
805 void sas_phy_free(struct sas_phy *phy)
806 {
807 transport_destroy_device(&phy->dev);
808 put_device(&phy->dev);
809 }
810 EXPORT_SYMBOL(sas_phy_free);
811
812 /**
813 * sas_phy_delete - remove SAS PHY
814 * @phy: SAS PHY to remove
815 *
816 * Removes the specified SAS PHY. If the SAS PHY has an
817 * associated remote PHY it is removed before.
818 */
819 void
820 sas_phy_delete(struct sas_phy *phy)
821 {
822 struct device *dev = &phy->dev;
823
824 /* this happens if the phy is still part of a port when deleted */
825 BUG_ON(!list_empty(&phy->port_siblings));
826
827 transport_remove_device(dev);
828 device_del(dev);
829 transport_destroy_device(dev);
830 put_device(dev);
831 }
832 EXPORT_SYMBOL(sas_phy_delete);
833
834 /**
835 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
836 * @dev: device to check
837 *
838 * Returns:
839 * %1 if the device represents a SAS PHY, %0 else
840 */
841 int scsi_is_sas_phy(const struct device *dev)
842 {
843 return dev->release == sas_phy_release;
844 }
845 EXPORT_SYMBOL(scsi_is_sas_phy);
846
847 /*
848 * SAS Port attributes
849 */
850 #define sas_port_show_simple(field, name, format_string, cast) \
851 static ssize_t \
852 show_sas_port_##name(struct device *dev, \
853 struct device_attribute *attr, char *buf) \
854 { \
855 struct sas_port *port = transport_class_to_sas_port(dev); \
856 \
857 return snprintf(buf, 20, format_string, cast port->field); \
858 }
859
860 #define sas_port_simple_attr(field, name, format_string, type) \
861 sas_port_show_simple(field, name, format_string, (type)) \
862 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
863
864 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
865
866 static DECLARE_TRANSPORT_CLASS(sas_port_class,
867 "sas_port", NULL, NULL, NULL);
868
869 static int sas_port_match(struct attribute_container *cont, struct device *dev)
870 {
871 struct Scsi_Host *shost;
872 struct sas_internal *i;
873
874 if (!scsi_is_sas_port(dev))
875 return 0;
876 shost = dev_to_shost(dev->parent);
877
878 if (!shost->transportt)
879 return 0;
880 if (shost->transportt->host_attrs.ac.class !=
881 &sas_host_class.class)
882 return 0;
883
884 i = to_sas_internal(shost->transportt);
885 return &i->port_attr_cont.ac == cont;
886 }
887
888
889 static void sas_port_release(struct device *dev)
890 {
891 struct sas_port *port = dev_to_sas_port(dev);
892
893 BUG_ON(!list_empty(&port->phy_list));
894
895 put_device(dev->parent);
896 kfree(port);
897 }
898
899 static void sas_port_create_link(struct sas_port *port,
900 struct sas_phy *phy)
901 {
902 int res;
903
904 res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
905 dev_name(&phy->dev));
906 if (res)
907 goto err;
908 res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
909 if (res)
910 goto err;
911 return;
912 err:
913 printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
914 __func__, res);
915 }
916
917 static void sas_port_delete_link(struct sas_port *port,
918 struct sas_phy *phy)
919 {
920 sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
921 sysfs_remove_link(&phy->dev.kobj, "port");
922 }
923
924 /** sas_port_alloc - allocate and initialize a SAS port structure
925 *
926 * @parent: parent device
927 * @port_id: port number
928 *
929 * Allocates a SAS port structure. It will be added to the device tree
930 * below the device specified by @parent which must be either a Scsi_Host
931 * or a sas_expander_device.
932 *
933 * Returns %NULL on error
934 */
935 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
936 {
937 struct Scsi_Host *shost = dev_to_shost(parent);
938 struct sas_port *port;
939
940 port = kzalloc(sizeof(*port), GFP_KERNEL);
941 if (!port)
942 return NULL;
943
944 port->port_identifier = port_id;
945
946 device_initialize(&port->dev);
947
948 port->dev.parent = get_device(parent);
949 port->dev.release = sas_port_release;
950
951 mutex_init(&port->phy_list_mutex);
952 INIT_LIST_HEAD(&port->phy_list);
953
954 if (scsi_is_sas_expander_device(parent)) {
955 struct sas_rphy *rphy = dev_to_rphy(parent);
956 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
957 rphy->scsi_target_id, port->port_identifier);
958 } else
959 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
960 port->port_identifier);
961
962 transport_setup_device(&port->dev);
963
964 return port;
965 }
966 EXPORT_SYMBOL(sas_port_alloc);
967
968 /** sas_port_alloc_num - allocate and initialize a SAS port structure
969 *
970 * @parent: parent device
971 *
972 * Allocates a SAS port structure and a number to go with it. This
973 * interface is really for adapters where the port number has no
974 * meansing, so the sas class should manage them. It will be added to
975 * the device tree below the device specified by @parent which must be
976 * either a Scsi_Host or a sas_expander_device.
977 *
978 * Returns %NULL on error
979 */
980 struct sas_port *sas_port_alloc_num(struct device *parent)
981 {
982 int index;
983 struct Scsi_Host *shost = dev_to_shost(parent);
984 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
985
986 /* FIXME: use idr for this eventually */
987 mutex_lock(&sas_host->lock);
988 if (scsi_is_sas_expander_device(parent)) {
989 struct sas_rphy *rphy = dev_to_rphy(parent);
990 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
991
992 index = exp->next_port_id++;
993 } else
994 index = sas_host->next_port_id++;
995 mutex_unlock(&sas_host->lock);
996 return sas_port_alloc(parent, index);
997 }
998 EXPORT_SYMBOL(sas_port_alloc_num);
999
1000 /**
1001 * sas_port_add - add a SAS port to the device hierarchy
1002 * @port: port to be added
1003 *
1004 * publishes a port to the rest of the system
1005 */
1006 int sas_port_add(struct sas_port *port)
1007 {
1008 int error;
1009
1010 /* No phys should be added until this is made visible */
1011 BUG_ON(!list_empty(&port->phy_list));
1012
1013 error = device_add(&port->dev);
1014
1015 if (error)
1016 return error;
1017
1018 transport_add_device(&port->dev);
1019 transport_configure_device(&port->dev);
1020
1021 return 0;
1022 }
1023 EXPORT_SYMBOL(sas_port_add);
1024
1025 /**
1026 * sas_port_free - free a SAS PORT
1027 * @port: SAS PORT to free
1028 *
1029 * Frees the specified SAS PORT.
1030 *
1031 * Note:
1032 * This function must only be called on a PORT that has not
1033 * successfully been added using sas_port_add().
1034 */
1035 void sas_port_free(struct sas_port *port)
1036 {
1037 transport_destroy_device(&port->dev);
1038 put_device(&port->dev);
1039 }
1040 EXPORT_SYMBOL(sas_port_free);
1041
1042 /**
1043 * sas_port_delete - remove SAS PORT
1044 * @port: SAS PORT to remove
1045 *
1046 * Removes the specified SAS PORT. If the SAS PORT has an
1047 * associated phys, unlink them from the port as well.
1048 */
1049 void sas_port_delete(struct sas_port *port)
1050 {
1051 struct device *dev = &port->dev;
1052 struct sas_phy *phy, *tmp_phy;
1053
1054 if (port->rphy) {
1055 sas_rphy_delete(port->rphy);
1056 port->rphy = NULL;
1057 }
1058
1059 mutex_lock(&port->phy_list_mutex);
1060 list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1061 port_siblings) {
1062 sas_port_delete_link(port, phy);
1063 list_del_init(&phy->port_siblings);
1064 }
1065 mutex_unlock(&port->phy_list_mutex);
1066
1067 if (port->is_backlink) {
1068 struct device *parent = port->dev.parent;
1069
1070 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1071 port->is_backlink = 0;
1072 }
1073
1074 transport_remove_device(dev);
1075 device_del(dev);
1076 transport_destroy_device(dev);
1077 put_device(dev);
1078 }
1079 EXPORT_SYMBOL(sas_port_delete);
1080
1081 /**
1082 * scsi_is_sas_port - check if a struct device represents a SAS port
1083 * @dev: device to check
1084 *
1085 * Returns:
1086 * %1 if the device represents a SAS Port, %0 else
1087 */
1088 int scsi_is_sas_port(const struct device *dev)
1089 {
1090 return dev->release == sas_port_release;
1091 }
1092 EXPORT_SYMBOL(scsi_is_sas_port);
1093
1094 /**
1095 * sas_port_get_phy - try to take a reference on a port member
1096 * @port: port to check
1097 */
1098 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1099 {
1100 struct sas_phy *phy;
1101
1102 mutex_lock(&port->phy_list_mutex);
1103 if (list_empty(&port->phy_list))
1104 phy = NULL;
1105 else {
1106 struct list_head *ent = port->phy_list.next;
1107
1108 phy = list_entry(ent, typeof(*phy), port_siblings);
1109 get_device(&phy->dev);
1110 }
1111 mutex_unlock(&port->phy_list_mutex);
1112
1113 return phy;
1114 }
1115 EXPORT_SYMBOL(sas_port_get_phy);
1116
1117 /**
1118 * sas_port_add_phy - add another phy to a port to form a wide port
1119 * @port: port to add the phy to
1120 * @phy: phy to add
1121 *
1122 * When a port is initially created, it is empty (has no phys). All
1123 * ports must have at least one phy to operated, and all wide ports
1124 * must have at least two. The current code makes no difference
1125 * between ports and wide ports, but the only object that can be
1126 * connected to a remote device is a port, so ports must be formed on
1127 * all devices with phys if they're connected to anything.
1128 */
1129 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1130 {
1131 mutex_lock(&port->phy_list_mutex);
1132 if (unlikely(!list_empty(&phy->port_siblings))) {
1133 /* make sure we're already on this port */
1134 struct sas_phy *tmp;
1135
1136 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1137 if (tmp == phy)
1138 break;
1139 /* If this trips, you added a phy that was already
1140 * part of a different port */
1141 if (unlikely(tmp != phy)) {
1142 dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1143 dev_name(&phy->dev));
1144 BUG();
1145 }
1146 } else {
1147 sas_port_create_link(port, phy);
1148 list_add_tail(&phy->port_siblings, &port->phy_list);
1149 port->num_phys++;
1150 }
1151 mutex_unlock(&port->phy_list_mutex);
1152 }
1153 EXPORT_SYMBOL(sas_port_add_phy);
1154
1155 /**
1156 * sas_port_delete_phy - remove a phy from a port or wide port
1157 * @port: port to remove the phy from
1158 * @phy: phy to remove
1159 *
1160 * This operation is used for tearing down ports again. It must be
1161 * done to every port or wide port before calling sas_port_delete.
1162 */
1163 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1164 {
1165 mutex_lock(&port->phy_list_mutex);
1166 sas_port_delete_link(port, phy);
1167 list_del_init(&phy->port_siblings);
1168 port->num_phys--;
1169 mutex_unlock(&port->phy_list_mutex);
1170 }
1171 EXPORT_SYMBOL(sas_port_delete_phy);
1172
1173 void sas_port_mark_backlink(struct sas_port *port)
1174 {
1175 int res;
1176 struct device *parent = port->dev.parent->parent->parent;
1177
1178 if (port->is_backlink)
1179 return;
1180 port->is_backlink = 1;
1181 res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1182 dev_name(parent));
1183 if (res)
1184 goto err;
1185 return;
1186 err:
1187 printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1188 __func__, res);
1189
1190 }
1191 EXPORT_SYMBOL(sas_port_mark_backlink);
1192
1193 /*
1194 * SAS remote PHY attributes.
1195 */
1196
1197 #define sas_rphy_show_simple(field, name, format_string, cast) \
1198 static ssize_t \
1199 show_sas_rphy_##name(struct device *dev, \
1200 struct device_attribute *attr, char *buf) \
1201 { \
1202 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1203 \
1204 return snprintf(buf, 20, format_string, cast rphy->field); \
1205 }
1206
1207 #define sas_rphy_simple_attr(field, name, format_string, type) \
1208 sas_rphy_show_simple(field, name, format_string, (type)) \
1209 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1210 show_sas_rphy_##name, NULL)
1211
1212 #define sas_rphy_show_protocol(field, name) \
1213 static ssize_t \
1214 show_sas_rphy_##name(struct device *dev, \
1215 struct device_attribute *attr, char *buf) \
1216 { \
1217 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1218 \
1219 if (!rphy->field) \
1220 return snprintf(buf, 20, "none\n"); \
1221 return get_sas_protocol_names(rphy->field, buf); \
1222 }
1223
1224 #define sas_rphy_protocol_attr(field, name) \
1225 sas_rphy_show_protocol(field, name) \
1226 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1227 show_sas_rphy_##name, NULL)
1228
1229 static ssize_t
1230 show_sas_rphy_device_type(struct device *dev,
1231 struct device_attribute *attr, char *buf)
1232 {
1233 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1234
1235 if (!rphy->identify.device_type)
1236 return snprintf(buf, 20, "none\n");
1237 return get_sas_device_type_names(
1238 rphy->identify.device_type, buf);
1239 }
1240
1241 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1242 show_sas_rphy_device_type, NULL);
1243
1244 static ssize_t
1245 show_sas_rphy_enclosure_identifier(struct device *dev,
1246 struct device_attribute *attr, char *buf)
1247 {
1248 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1249 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1250 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1251 struct sas_internal *i = to_sas_internal(shost->transportt);
1252 u64 identifier;
1253 int error;
1254
1255 error = i->f->get_enclosure_identifier(rphy, &identifier);
1256 if (error)
1257 return error;
1258 return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1259 }
1260
1261 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1262 show_sas_rphy_enclosure_identifier, NULL);
1263
1264 static ssize_t
1265 show_sas_rphy_bay_identifier(struct device *dev,
1266 struct device_attribute *attr, char *buf)
1267 {
1268 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1269 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1270 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1271 struct sas_internal *i = to_sas_internal(shost->transportt);
1272 int val;
1273
1274 val = i->f->get_bay_identifier(rphy);
1275 if (val < 0)
1276 return val;
1277 return sprintf(buf, "%d\n", val);
1278 }
1279
1280 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1281 show_sas_rphy_bay_identifier, NULL);
1282
1283 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1284 initiator_port_protocols);
1285 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1286 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1287 unsigned long long);
1288 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1289 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1290
1291 /* only need 8 bytes of data plus header (4 or 8) */
1292 #define BUF_SIZE 64
1293
1294 int sas_read_port_mode_page(struct scsi_device *sdev)
1295 {
1296 char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1297 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1298 struct scsi_mode_data mode_data;
1299 int res, error;
1300
1301 if (!buffer)
1302 return -ENOMEM;
1303
1304 res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1305 &mode_data, NULL);
1306
1307 error = -EINVAL;
1308 if (!scsi_status_is_good(res))
1309 goto out;
1310
1311 msdata = buffer + mode_data.header_length +
1312 mode_data.block_descriptor_length;
1313
1314 if (msdata - buffer > BUF_SIZE - 8)
1315 goto out;
1316
1317 error = 0;
1318
1319 rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1320 rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1321 rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1322
1323 out:
1324 kfree(buffer);
1325 return error;
1326 }
1327 EXPORT_SYMBOL(sas_read_port_mode_page);
1328
1329 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1330 "sas_end_device", NULL, NULL, NULL);
1331
1332 #define sas_end_dev_show_simple(field, name, format_string, cast) \
1333 static ssize_t \
1334 show_sas_end_dev_##name(struct device *dev, \
1335 struct device_attribute *attr, char *buf) \
1336 { \
1337 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1338 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1339 \
1340 return snprintf(buf, 20, format_string, cast rdev->field); \
1341 }
1342
1343 #define sas_end_dev_simple_attr(field, name, format_string, type) \
1344 sas_end_dev_show_simple(field, name, format_string, (type)) \
1345 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1346 show_sas_end_dev_##name, NULL)
1347
1348 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1349 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1350 "%d\n", int);
1351 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1352 "%d\n", int);
1353 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1354 "%d\n", int);
1355 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1356 "%d\n", int);
1357
1358 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1359 "sas_expander", NULL, NULL, NULL);
1360
1361 #define sas_expander_show_simple(field, name, format_string, cast) \
1362 static ssize_t \
1363 show_sas_expander_##name(struct device *dev, \
1364 struct device_attribute *attr, char *buf) \
1365 { \
1366 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1367 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1368 \
1369 return snprintf(buf, 20, format_string, cast edev->field); \
1370 }
1371
1372 #define sas_expander_simple_attr(field, name, format_string, type) \
1373 sas_expander_show_simple(field, name, format_string, (type)) \
1374 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1375 show_sas_expander_##name, NULL)
1376
1377 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1378 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1379 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1380 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1381 "%s\n", char *);
1382 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1383 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1384 unsigned int);
1385 sas_expander_simple_attr(level, level, "%d\n", int);
1386
1387 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1388 "sas_device", NULL, NULL, NULL);
1389
1390 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1391 {
1392 struct Scsi_Host *shost;
1393 struct sas_internal *i;
1394
1395 if (!scsi_is_sas_rphy(dev))
1396 return 0;
1397 shost = dev_to_shost(dev->parent->parent);
1398
1399 if (!shost->transportt)
1400 return 0;
1401 if (shost->transportt->host_attrs.ac.class !=
1402 &sas_host_class.class)
1403 return 0;
1404
1405 i = to_sas_internal(shost->transportt);
1406 return &i->rphy_attr_cont.ac == cont;
1407 }
1408
1409 static int sas_end_dev_match(struct attribute_container *cont,
1410 struct device *dev)
1411 {
1412 struct Scsi_Host *shost;
1413 struct sas_internal *i;
1414 struct sas_rphy *rphy;
1415
1416 if (!scsi_is_sas_rphy(dev))
1417 return 0;
1418 shost = dev_to_shost(dev->parent->parent);
1419 rphy = dev_to_rphy(dev);
1420
1421 if (!shost->transportt)
1422 return 0;
1423 if (shost->transportt->host_attrs.ac.class !=
1424 &sas_host_class.class)
1425 return 0;
1426
1427 i = to_sas_internal(shost->transportt);
1428 return &i->end_dev_attr_cont.ac == cont &&
1429 rphy->identify.device_type == SAS_END_DEVICE;
1430 }
1431
1432 static int sas_expander_match(struct attribute_container *cont,
1433 struct device *dev)
1434 {
1435 struct Scsi_Host *shost;
1436 struct sas_internal *i;
1437 struct sas_rphy *rphy;
1438
1439 if (!scsi_is_sas_rphy(dev))
1440 return 0;
1441 shost = dev_to_shost(dev->parent->parent);
1442 rphy = dev_to_rphy(dev);
1443
1444 if (!shost->transportt)
1445 return 0;
1446 if (shost->transportt->host_attrs.ac.class !=
1447 &sas_host_class.class)
1448 return 0;
1449
1450 i = to_sas_internal(shost->transportt);
1451 return &i->expander_attr_cont.ac == cont &&
1452 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1453 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1454 }
1455
1456 static void sas_expander_release(struct device *dev)
1457 {
1458 struct sas_rphy *rphy = dev_to_rphy(dev);
1459 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1460
1461 if (rphy->q)
1462 blk_cleanup_queue(rphy->q);
1463
1464 put_device(dev->parent);
1465 kfree(edev);
1466 }
1467
1468 static void sas_end_device_release(struct device *dev)
1469 {
1470 struct sas_rphy *rphy = dev_to_rphy(dev);
1471 struct sas_end_device *edev = rphy_to_end_device(rphy);
1472
1473 if (rphy->q)
1474 blk_cleanup_queue(rphy->q);
1475
1476 put_device(dev->parent);
1477 kfree(edev);
1478 }
1479
1480 /**
1481 * sas_rphy_initialize - common rphy intialization
1482 * @rphy: rphy to initialise
1483 *
1484 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1485 * initialise the common rphy component of each.
1486 */
1487 static void sas_rphy_initialize(struct sas_rphy *rphy)
1488 {
1489 INIT_LIST_HEAD(&rphy->list);
1490 }
1491
1492 /**
1493 * sas_end_device_alloc - allocate an rphy for an end device
1494 * @parent: which port
1495 *
1496 * Allocates an SAS remote PHY structure, connected to @parent.
1497 *
1498 * Returns:
1499 * SAS PHY allocated or %NULL if the allocation failed.
1500 */
1501 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1502 {
1503 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1504 struct sas_end_device *rdev;
1505
1506 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1507 if (!rdev) {
1508 return NULL;
1509 }
1510
1511 device_initialize(&rdev->rphy.dev);
1512 rdev->rphy.dev.parent = get_device(&parent->dev);
1513 rdev->rphy.dev.release = sas_end_device_release;
1514 if (scsi_is_sas_expander_device(parent->dev.parent)) {
1515 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1516 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1517 shost->host_no, rphy->scsi_target_id,
1518 parent->port_identifier);
1519 } else
1520 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1521 shost->host_no, parent->port_identifier);
1522 rdev->rphy.identify.device_type = SAS_END_DEVICE;
1523 sas_rphy_initialize(&rdev->rphy);
1524 transport_setup_device(&rdev->rphy.dev);
1525
1526 return &rdev->rphy;
1527 }
1528 EXPORT_SYMBOL(sas_end_device_alloc);
1529
1530 /**
1531 * sas_expander_alloc - allocate an rphy for an end device
1532 * @parent: which port
1533 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1534 *
1535 * Allocates an SAS remote PHY structure, connected to @parent.
1536 *
1537 * Returns:
1538 * SAS PHY allocated or %NULL if the allocation failed.
1539 */
1540 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1541 enum sas_device_type type)
1542 {
1543 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1544 struct sas_expander_device *rdev;
1545 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1546
1547 BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1548 type != SAS_FANOUT_EXPANDER_DEVICE);
1549
1550 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1551 if (!rdev) {
1552 return NULL;
1553 }
1554
1555 device_initialize(&rdev->rphy.dev);
1556 rdev->rphy.dev.parent = get_device(&parent->dev);
1557 rdev->rphy.dev.release = sas_expander_release;
1558 mutex_lock(&sas_host->lock);
1559 rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1560 mutex_unlock(&sas_host->lock);
1561 dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1562 shost->host_no, rdev->rphy.scsi_target_id);
1563 rdev->rphy.identify.device_type = type;
1564 sas_rphy_initialize(&rdev->rphy);
1565 transport_setup_device(&rdev->rphy.dev);
1566
1567 return &rdev->rphy;
1568 }
1569 EXPORT_SYMBOL(sas_expander_alloc);
1570
1571 /**
1572 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
1573 * @rphy: The remote PHY to be added
1574 *
1575 * Publishes a SAS remote PHY to the rest of the system.
1576 */
1577 int sas_rphy_add(struct sas_rphy *rphy)
1578 {
1579 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1580 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1581 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1582 struct sas_identify *identify = &rphy->identify;
1583 int error;
1584
1585 if (parent->rphy)
1586 return -ENXIO;
1587 parent->rphy = rphy;
1588
1589 error = device_add(&rphy->dev);
1590 if (error)
1591 return error;
1592 transport_add_device(&rphy->dev);
1593 transport_configure_device(&rphy->dev);
1594 if (sas_bsg_initialize(shost, rphy))
1595 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1596
1597
1598 mutex_lock(&sas_host->lock);
1599 list_add_tail(&rphy->list, &sas_host->rphy_list);
1600 if (identify->device_type == SAS_END_DEVICE &&
1601 (identify->target_port_protocols &
1602 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1603 rphy->scsi_target_id = sas_host->next_target_id++;
1604 else if (identify->device_type == SAS_END_DEVICE)
1605 rphy->scsi_target_id = -1;
1606 mutex_unlock(&sas_host->lock);
1607
1608 if (identify->device_type == SAS_END_DEVICE &&
1609 rphy->scsi_target_id != -1) {
1610 int lun;
1611
1612 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1613 lun = SCAN_WILD_CARD;
1614 else
1615 lun = 0;
1616
1617 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1618 }
1619
1620 return 0;
1621 }
1622 EXPORT_SYMBOL(sas_rphy_add);
1623
1624 /**
1625 * sas_rphy_free - free a SAS remote PHY
1626 * @rphy: SAS remote PHY to free
1627 *
1628 * Frees the specified SAS remote PHY.
1629 *
1630 * Note:
1631 * This function must only be called on a remote
1632 * PHY that has not successfully been added using
1633 * sas_rphy_add() (or has been sas_rphy_remove()'d)
1634 */
1635 void sas_rphy_free(struct sas_rphy *rphy)
1636 {
1637 struct device *dev = &rphy->dev;
1638 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1639 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1640
1641 mutex_lock(&sas_host->lock);
1642 list_del(&rphy->list);
1643 mutex_unlock(&sas_host->lock);
1644
1645 transport_destroy_device(dev);
1646
1647 put_device(dev);
1648 }
1649 EXPORT_SYMBOL(sas_rphy_free);
1650
1651 /**
1652 * sas_rphy_delete - remove and free SAS remote PHY
1653 * @rphy: SAS remote PHY to remove and free
1654 *
1655 * Removes the specified SAS remote PHY and frees it.
1656 */
1657 void
1658 sas_rphy_delete(struct sas_rphy *rphy)
1659 {
1660 sas_rphy_remove(rphy);
1661 sas_rphy_free(rphy);
1662 }
1663 EXPORT_SYMBOL(sas_rphy_delete);
1664
1665 /**
1666 * sas_rphy_unlink - unlink SAS remote PHY
1667 * @rphy: SAS remote phy to unlink from its parent port
1668 *
1669 * Removes port reference to an rphy
1670 */
1671 void sas_rphy_unlink(struct sas_rphy *rphy)
1672 {
1673 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1674
1675 parent->rphy = NULL;
1676 }
1677 EXPORT_SYMBOL(sas_rphy_unlink);
1678
1679 /**
1680 * sas_rphy_remove - remove SAS remote PHY
1681 * @rphy: SAS remote phy to remove
1682 *
1683 * Removes the specified SAS remote PHY.
1684 */
1685 void
1686 sas_rphy_remove(struct sas_rphy *rphy)
1687 {
1688 struct device *dev = &rphy->dev;
1689
1690 switch (rphy->identify.device_type) {
1691 case SAS_END_DEVICE:
1692 scsi_remove_target(dev);
1693 break;
1694 case SAS_EDGE_EXPANDER_DEVICE:
1695 case SAS_FANOUT_EXPANDER_DEVICE:
1696 sas_remove_children(dev);
1697 break;
1698 default:
1699 break;
1700 }
1701
1702 sas_rphy_unlink(rphy);
1703 sas_bsg_remove(NULL, rphy);
1704 transport_remove_device(dev);
1705 device_del(dev);
1706 }
1707 EXPORT_SYMBOL(sas_rphy_remove);
1708
1709 /**
1710 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1711 * @dev: device to check
1712 *
1713 * Returns:
1714 * %1 if the device represents a SAS remote PHY, %0 else
1715 */
1716 int scsi_is_sas_rphy(const struct device *dev)
1717 {
1718 return dev->release == sas_end_device_release ||
1719 dev->release == sas_expander_release;
1720 }
1721 EXPORT_SYMBOL(scsi_is_sas_rphy);
1722
1723
1724 /*
1725 * SCSI scan helper
1726 */
1727
1728 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1729 uint id, u64 lun)
1730 {
1731 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1732 struct sas_rphy *rphy;
1733
1734 mutex_lock(&sas_host->lock);
1735 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1736 if (rphy->identify.device_type != SAS_END_DEVICE ||
1737 rphy->scsi_target_id == -1)
1738 continue;
1739
1740 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1741 (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1742 scsi_scan_target(&rphy->dev, 0,
1743 rphy->scsi_target_id, lun, 1);
1744 }
1745 }
1746 mutex_unlock(&sas_host->lock);
1747
1748 return 0;
1749 }
1750
1751
1752 /*
1753 * Setup / Teardown code
1754 */
1755
1756 #define SETUP_TEMPLATE(attrb, field, perm, test) \
1757 i->private_##attrb[count] = dev_attr_##field; \
1758 i->private_##attrb[count].attr.mode = perm; \
1759 i->attrb[count] = &i->private_##attrb[count]; \
1760 if (test) \
1761 count++
1762
1763 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1764 i->private_##attrb[count] = dev_attr_##field; \
1765 i->private_##attrb[count].attr.mode = perm; \
1766 if (ro_test) { \
1767 i->private_##attrb[count].attr.mode = ro_perm; \
1768 i->private_##attrb[count].store = NULL; \
1769 } \
1770 i->attrb[count] = &i->private_##attrb[count]; \
1771 if (test) \
1772 count++
1773
1774 #define SETUP_RPORT_ATTRIBUTE(field) \
1775 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1776
1777 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1778 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1779
1780 #define SETUP_PHY_ATTRIBUTE(field) \
1781 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1782
1783 #define SETUP_PHY_ATTRIBUTE_RW(field) \
1784 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1785 !i->f->set_phy_speed, S_IRUGO)
1786
1787 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1788 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1789 !i->f->func, S_IRUGO)
1790
1791 #define SETUP_PORT_ATTRIBUTE(field) \
1792 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1793
1794 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1795 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1796
1797 #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1798 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1799
1800 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1801 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1802
1803 #define SETUP_END_DEV_ATTRIBUTE(field) \
1804 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1805
1806 #define SETUP_EXPANDER_ATTRIBUTE(field) \
1807 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1808
1809 /**
1810 * sas_attach_transport - instantiate SAS transport template
1811 * @ft: SAS transport class function template
1812 */
1813 struct scsi_transport_template *
1814 sas_attach_transport(struct sas_function_template *ft)
1815 {
1816 struct sas_internal *i;
1817 int count;
1818
1819 i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1820 if (!i)
1821 return NULL;
1822
1823 i->t.user_scan = sas_user_scan;
1824
1825 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1826 i->t.host_attrs.ac.class = &sas_host_class.class;
1827 i->t.host_attrs.ac.match = sas_host_match;
1828 transport_container_register(&i->t.host_attrs);
1829 i->t.host_size = sizeof(struct sas_host_attrs);
1830
1831 i->phy_attr_cont.ac.class = &sas_phy_class.class;
1832 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1833 i->phy_attr_cont.ac.match = sas_phy_match;
1834 transport_container_register(&i->phy_attr_cont);
1835
1836 i->port_attr_cont.ac.class = &sas_port_class.class;
1837 i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1838 i->port_attr_cont.ac.match = sas_port_match;
1839 transport_container_register(&i->port_attr_cont);
1840
1841 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1842 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1843 i->rphy_attr_cont.ac.match = sas_rphy_match;
1844 transport_container_register(&i->rphy_attr_cont);
1845
1846 i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1847 i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1848 i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1849 transport_container_register(&i->end_dev_attr_cont);
1850
1851 i->expander_attr_cont.ac.class = &sas_expander_class.class;
1852 i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1853 i->expander_attr_cont.ac.match = sas_expander_match;
1854 transport_container_register(&i->expander_attr_cont);
1855
1856 i->f = ft;
1857
1858 count = 0;
1859 SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1860 SETUP_PHY_ATTRIBUTE(target_port_protocols);
1861 SETUP_PHY_ATTRIBUTE(device_type);
1862 SETUP_PHY_ATTRIBUTE(sas_address);
1863 SETUP_PHY_ATTRIBUTE(phy_identifier);
1864 //SETUP_PHY_ATTRIBUTE(port_identifier);
1865 SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1866 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1867 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1868 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1869 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1870
1871 SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1872 SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1873 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1874 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1875 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1876 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1877 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1878 i->phy_attrs[count] = NULL;
1879
1880 count = 0;
1881 SETUP_PORT_ATTRIBUTE(num_phys);
1882 i->port_attrs[count] = NULL;
1883
1884 count = 0;
1885 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1886 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1887 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1888 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1889 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1890 SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1891 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1892 get_enclosure_identifier);
1893 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1894 get_bay_identifier);
1895 i->rphy_attrs[count] = NULL;
1896
1897 count = 0;
1898 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1899 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1900 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1901 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1902 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1903 i->end_dev_attrs[count] = NULL;
1904
1905 count = 0;
1906 SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1907 SETUP_EXPANDER_ATTRIBUTE(product_id);
1908 SETUP_EXPANDER_ATTRIBUTE(product_rev);
1909 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1910 SETUP_EXPANDER_ATTRIBUTE(component_id);
1911 SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1912 SETUP_EXPANDER_ATTRIBUTE(level);
1913 i->expander_attrs[count] = NULL;
1914
1915 return &i->t;
1916 }
1917 EXPORT_SYMBOL(sas_attach_transport);
1918
1919 /**
1920 * sas_release_transport - release SAS transport template instance
1921 * @t: transport template instance
1922 */
1923 void sas_release_transport(struct scsi_transport_template *t)
1924 {
1925 struct sas_internal *i = to_sas_internal(t);
1926
1927 transport_container_unregister(&i->t.host_attrs);
1928 transport_container_unregister(&i->phy_attr_cont);
1929 transport_container_unregister(&i->port_attr_cont);
1930 transport_container_unregister(&i->rphy_attr_cont);
1931 transport_container_unregister(&i->end_dev_attr_cont);
1932 transport_container_unregister(&i->expander_attr_cont);
1933
1934 kfree(i);
1935 }
1936 EXPORT_SYMBOL(sas_release_transport);
1937
1938 static __init int sas_transport_init(void)
1939 {
1940 int error;
1941
1942 error = transport_class_register(&sas_host_class);
1943 if (error)
1944 goto out;
1945 error = transport_class_register(&sas_phy_class);
1946 if (error)
1947 goto out_unregister_transport;
1948 error = transport_class_register(&sas_port_class);
1949 if (error)
1950 goto out_unregister_phy;
1951 error = transport_class_register(&sas_rphy_class);
1952 if (error)
1953 goto out_unregister_port;
1954 error = transport_class_register(&sas_end_dev_class);
1955 if (error)
1956 goto out_unregister_rphy;
1957 error = transport_class_register(&sas_expander_class);
1958 if (error)
1959 goto out_unregister_end_dev;
1960
1961 return 0;
1962
1963 out_unregister_end_dev:
1964 transport_class_unregister(&sas_end_dev_class);
1965 out_unregister_rphy:
1966 transport_class_unregister(&sas_rphy_class);
1967 out_unregister_port:
1968 transport_class_unregister(&sas_port_class);
1969 out_unregister_phy:
1970 transport_class_unregister(&sas_phy_class);
1971 out_unregister_transport:
1972 transport_class_unregister(&sas_host_class);
1973 out:
1974 return error;
1975
1976 }
1977
1978 static void __exit sas_transport_exit(void)
1979 {
1980 transport_class_unregister(&sas_host_class);
1981 transport_class_unregister(&sas_phy_class);
1982 transport_class_unregister(&sas_port_class);
1983 transport_class_unregister(&sas_rphy_class);
1984 transport_class_unregister(&sas_end_dev_class);
1985 transport_class_unregister(&sas_expander_class);
1986 }
1987
1988 MODULE_AUTHOR("Christoph Hellwig");
1989 MODULE_DESCRIPTION("SAS Transport Attributes");
1990 MODULE_LICENSE("GPL");
1991
1992 module_init(sas_transport_init);
1993 module_exit(sas_transport_exit);
Linux kernel - Deliverables
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