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[SCSI] for_each_possible_cpu: scsi
[deliverable/linux.git] / drivers / scsi / scsi_transport_sas.c
CommitLineData
c7ebbbce 1/*
a0125641 2 * Copyright (C) 2005-2006 Dell Inc.
c7ebbbce
CH		 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 managment
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/err.h>
8c65b4a6
TS		 29#include <linux/slab.h>
30#include <linux/string.h>
c7ebbbce 31
e02f3f59 32#include <scsi/scsi.h>
c7ebbbce
CH		 33#include <scsi/scsi_device.h>
34#include <scsi/scsi_host.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_sas.h>
37
38
39#define SAS_HOST_ATTRS 0
07ba3a95 40#define SAS_PORT_ATTRS 17
a0125641 41#define SAS_RPORT_ATTRS 7
42ab0360 42#define SAS_END_DEV_ATTRS 3
79cb1819 43#define SAS_EXPANDER_ATTRS 7
c7ebbbce
CH		 44
45struct sas_internal {
46 struct scsi_transport_template t;
47 struct sas_function_template *f;
48
49 struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];
50 struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];
51 struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];
42ab0360 52 struct class_device_attribute private_end_dev_attrs[SAS_END_DEV_ATTRS];
79cb1819 53 struct class_device_attribute private_expander_attrs[SAS_EXPANDER_ATTRS];
c7ebbbce
CH		 54
55 struct transport_container phy_attr_cont;
56 struct transport_container rphy_attr_cont;
42ab0360 57 struct transport_container end_dev_attr_cont;
79cb1819 58 struct transport_container expander_attr_cont;
c7ebbbce
CH		 59
60 /*
61 * The array of null terminated pointers to attributes
62 * needed by scsi_sysfs.c
63 */
64 struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];
65 struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];
66 struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];
42ab0360 67 struct class_device_attribute *end_dev_attrs[SAS_END_DEV_ATTRS + 1];
79cb1819 68 struct class_device_attribute *expander_attrs[SAS_EXPANDER_ATTRS + 1];
c7ebbbce
CH		 69};
70#define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
71
72struct sas_host_attrs {
73 struct list_head rphy_list;
e02f3f59 74 struct mutex lock;
c7ebbbce 75 u32 next_target_id;
79cb1819 76 u32 next_expander_id;
c7ebbbce
CH		 77};
78#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
79
80
81/*
82 * Hack to allow attributes of the same name in different objects.
83 */
84#define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
85 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
86 __ATTR(_name,_mode,_show,_store)
87
88
89/*
90 * Pretty printing helpers
91 */
92
93#define sas_bitfield_name_match(title, table) \
94static ssize_t \
95get_sas_##title##_names(u32 table_key, char *buf) \
96{ \
97 char *prefix = ""; \
98 ssize_t len = 0; \
99 int i; \
100 \
101 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
102 if (table[i].value & table_key) { \
103 len += sprintf(buf + len, "%s%s", \
104 prefix, table[i].name); \
105 prefix = ", "; \
106 } \
107 } \
108 len += sprintf(buf + len, "\n"); \
109 return len; \
110}
111
112#define sas_bitfield_name_search(title, table) \
113static ssize_t \
114get_sas_##title##_names(u32 table_key, char *buf) \
115{ \
116 ssize_t len = 0; \
117 int i; \
118 \
119 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
120 if (table[i].value == table_key) { \
121 len += sprintf(buf + len, "%s", \
122 table[i].name); \
123 break; \
124 } \
125 } \
126 len += sprintf(buf + len, "\n"); \
127 return len; \
128}
129
130static struct {
131 u32 value;
132 char *name;
133} sas_device_type_names[] = {
134 { SAS_PHY_UNUSED, "unused" },
135 { SAS_END_DEVICE, "end device" },
136 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
137 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
138};
139sas_bitfield_name_search(device_type, sas_device_type_names)
140
141
142static struct {
143 u32 value;
144 char *name;
145} sas_protocol_names[] = {
146 { SAS_PROTOCOL_SATA, "sata" },
147 { SAS_PROTOCOL_SMP, "smp" },
148 { SAS_PROTOCOL_STP, "stp" },
149 { SAS_PROTOCOL_SSP, "ssp" },
150};
151sas_bitfield_name_match(protocol, sas_protocol_names)
152
153static struct {
154 u32 value;
155 char *name;
156} sas_linkspeed_names[] = {
157 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
158 { SAS_PHY_DISABLED, "Phy disabled" },
159 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
160 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
161 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
162 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
7e6dff62 163 { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
c7ebbbce
CH		 164};
165sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
166
167
168/*
169 * SAS host attributes
170 */
171
37be6eeb
JB		 172static int sas_host_setup(struct transport_container *tc, struct device *dev,
173 struct class_device *cdev)
c7ebbbce
CH		 174{
175 struct Scsi_Host *shost = dev_to_shost(dev);
176 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
177
178 INIT_LIST_HEAD(&sas_host->rphy_list);
e02f3f59 179 mutex_init(&sas_host->lock);
c7ebbbce 180 sas_host->next_target_id = 0;
79cb1819 181 sas_host->next_expander_id = 0;
c7ebbbce
CH		 182 return 0;
183}
184
185static DECLARE_TRANSPORT_CLASS(sas_host_class,
186 "sas_host", sas_host_setup, NULL, NULL);
187
188static int sas_host_match(struct attribute_container *cont,
189 struct device *dev)
190{
191 struct Scsi_Host *shost;
192 struct sas_internal *i;
193
194 if (!scsi_is_host_device(dev))
195 return 0;
196 shost = dev_to_shost(dev);
197
198 if (!shost->transportt)
199 return 0;
200 if (shost->transportt->host_attrs.ac.class !=
201 &sas_host_class.class)
202 return 0;
203
204 i = to_sas_internal(shost->transportt);
205 return &i->t.host_attrs.ac == cont;
206}
207
208static int do_sas_phy_delete(struct device *dev, void *data)
209{
210 if (scsi_is_sas_phy(dev))
211 sas_phy_delete(dev_to_phy(dev));
212 return 0;
213}
214
215/**
216 * sas_remove_host -- tear down a Scsi_Host's SAS data structures
217 * @shost: Scsi Host that is torn down
218 *
219 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
220 * Must be called just before scsi_remove_host for SAS HBAs.
221 */
222void sas_remove_host(struct Scsi_Host *shost)
223{
224 device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
225}
226EXPORT_SYMBOL(sas_remove_host);
227
228
229/*
230 * SAS Port attributes
231 */
232
233#define sas_phy_show_simple(field, name, format_string, cast) \
234static ssize_t \
235show_sas_phy_##name(struct class_device *cdev, char *buf) \
236{ \
237 struct sas_phy *phy = transport_class_to_phy(cdev); \
238 \
239 return snprintf(buf, 20, format_string, cast phy->field); \
240}
241
242#define sas_phy_simple_attr(field, name, format_string, type) \
243 sas_phy_show_simple(field, name, format_string, (type)) \
244static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
245
246#define sas_phy_show_protocol(field, name) \
247static ssize_t \
248show_sas_phy_##name(struct class_device *cdev, char *buf) \
249{ \
250 struct sas_phy *phy = transport_class_to_phy(cdev); \
251 \
252 if (!phy->field) \
253 return snprintf(buf, 20, "none\n"); \
254 return get_sas_protocol_names(phy->field, buf); \
255}
256
257#define sas_phy_protocol_attr(field, name) \
258 sas_phy_show_protocol(field, name) \
259static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
260
261#define sas_phy_show_linkspeed(field) \
262static ssize_t \
263show_sas_phy_##field(struct class_device *cdev, char *buf) \
264{ \
265 struct sas_phy *phy = transport_class_to_phy(cdev); \
266 \
267 return get_sas_linkspeed_names(phy->field, buf); \
268}
269
270#define sas_phy_linkspeed_attr(field) \
271 sas_phy_show_linkspeed(field) \
272static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
273
c3ee74c4
CH		 274#define sas_phy_show_linkerror(field) \
275static ssize_t \
276show_sas_phy_##field(struct class_device *cdev, char *buf) \
277{ \
278 struct sas_phy *phy = transport_class_to_phy(cdev); \
279 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
280 struct sas_internal *i = to_sas_internal(shost->transportt); \
281 int error; \
282 \
ac01bbbd
CH		 283 if (!phy->local_attached) \
284 return -EINVAL; \
285 \
dd9fbb52 286 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
c3ee74c4
CH		 287 if (error) \
288 return error; \
289 return snprintf(buf, 20, "%u\n", phy->field); \
290}
291
292#define sas_phy_linkerror_attr(field) \
293 sas_phy_show_linkerror(field) \
294static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
295
296
c7ebbbce
CH		 297static ssize_t
298show_sas_device_type(struct class_device *cdev, char *buf)
299{
300 struct sas_phy *phy = transport_class_to_phy(cdev);
301
302 if (!phy->identify.device_type)
303 return snprintf(buf, 20, "none\n");
304 return get_sas_device_type_names(phy->identify.device_type, buf);
305}
c7ebbbce
CH		 306static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
307
07ba3a95
CH		 308static ssize_t do_sas_phy_reset(struct class_device *cdev,
309 size_t count, int hard_reset)
310{
311 struct sas_phy *phy = transport_class_to_phy(cdev);
312 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
313 struct sas_internal *i = to_sas_internal(shost->transportt);
314 int error;
315
316 if (!phy->local_attached)
317 return -EINVAL;
318
319 error = i->f->phy_reset(phy, hard_reset);
320 if (error)
321 return error;
322 return count;
323};
324
325static ssize_t store_sas_link_reset(struct class_device *cdev,
326 const char *buf, size_t count)
327{
328 return do_sas_phy_reset(cdev, count, 0);
329}
330static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
331
332static ssize_t store_sas_hard_reset(struct class_device *cdev,
333 const char *buf, size_t count)
334{
335 return do_sas_phy_reset(cdev, count, 1);
336}
337static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
338
c7ebbbce
CH		 339sas_phy_protocol_attr(identify.initiator_port_protocols,
340 initiator_port_protocols);
341sas_phy_protocol_attr(identify.target_port_protocols,
342 target_port_protocols);
343sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
344 unsigned long long);
345sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
346sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
347sas_phy_linkspeed_attr(negotiated_linkrate);
348sas_phy_linkspeed_attr(minimum_linkrate_hw);
349sas_phy_linkspeed_attr(minimum_linkrate);
350sas_phy_linkspeed_attr(maximum_linkrate_hw);
351sas_phy_linkspeed_attr(maximum_linkrate);
c3ee74c4
CH		 352sas_phy_linkerror_attr(invalid_dword_count);
353sas_phy_linkerror_attr(running_disparity_error_count);
354sas_phy_linkerror_attr(loss_of_dword_sync_count);
355sas_phy_linkerror_attr(phy_reset_problem_count);
c7ebbbce
CH		 356
357
358static DECLARE_TRANSPORT_CLASS(sas_phy_class,
359 "sas_phy", NULL, NULL, NULL);
360
361static int sas_phy_match(struct attribute_container *cont, struct device *dev)
362{
363 struct Scsi_Host *shost;
364 struct sas_internal *i;
365
366 if (!scsi_is_sas_phy(dev))
367 return 0;
368 shost = dev_to_shost(dev->parent);
369
370 if (!shost->transportt)
371 return 0;
372 if (shost->transportt->host_attrs.ac.class !=
373 &sas_host_class.class)
374 return 0;
375
376 i = to_sas_internal(shost->transportt);
377 return &i->phy_attr_cont.ac == cont;
378}
379
380static void sas_phy_release(struct device *dev)
381{
382 struct sas_phy *phy = dev_to_phy(dev);
383
384 put_device(dev->parent);
385 kfree(phy);
386}
387
388/**
389 * sas_phy_alloc -- allocates and initialize a SAS PHY structure
390 * @parent: Parent device
d99ca418 391 * @number: Phy index
c7ebbbce
CH		 392 *
393 * Allocates an SAS PHY structure. It will be added in the device tree
394 * below the device specified by @parent, which has to be either a Scsi_Host
395 * or sas_rphy.
396 *
397 * Returns:
398 * SAS PHY allocated or %NULL if the allocation failed.
399 */
400struct sas_phy *sas_phy_alloc(struct device *parent, int number)
401{
402 struct Scsi_Host *shost = dev_to_shost(parent);
403 struct sas_phy *phy;
404
24669f75 405 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
c7ebbbce
CH		 406 if (!phy)
407 return NULL;
c7ebbbce 408
c7ebbbce
CH		 409 phy->number = number;
410
411 device_initialize(&phy->dev);
412 phy->dev.parent = get_device(parent);
413 phy->dev.release = sas_phy_release;
79cb1819
JB		 414 if (scsi_is_sas_expander_device(parent)) {
415 struct sas_rphy *rphy = dev_to_rphy(parent);
416 sprintf(phy->dev.bus_id, "phy-%d-%d:%d", shost->host_no,
417 rphy->scsi_target_id, number);
418 } else
419 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
c7ebbbce
CH		 420
421 transport_setup_device(&phy->dev);
422
423 return phy;
424}
425EXPORT_SYMBOL(sas_phy_alloc);
426
427/**
428 * sas_phy_add -- add a SAS PHY to the device hierachy
429 * @phy: The PHY to be added
430 *
431 * Publishes a SAS PHY to the rest of the system.
432 */
433int sas_phy_add(struct sas_phy *phy)
434{
435 int error;
436
437 error = device_add(&phy->dev);
438 if (!error) {
439 transport_add_device(&phy->dev);
440 transport_configure_device(&phy->dev);
441 }
442
443 return error;
444}
445EXPORT_SYMBOL(sas_phy_add);
446
447/**
448 * sas_phy_free -- free a SAS PHY
449 * @phy: SAS PHY to free
450 *
451 * Frees the specified SAS PHY.
452 *
453 * Note:
454 * This function must only be called on a PHY that has not
455 * sucessfully been added using sas_phy_add().
456 */
457void sas_phy_free(struct sas_phy *phy)
458{
459 transport_destroy_device(&phy->dev);
92aab646 460 put_device(&phy->dev);
c7ebbbce
CH		 461}
462EXPORT_SYMBOL(sas_phy_free);
463
464/**
465 * sas_phy_delete -- remove SAS PHY
466 * @phy: SAS PHY to remove
467 *
468 * Removes the specified SAS PHY. If the SAS PHY has an
469 * associated remote PHY it is removed before.
470 */
471void
472sas_phy_delete(struct sas_phy *phy)
473{
474 struct device *dev = &phy->dev;
475
476 if (phy->rphy)
477 sas_rphy_delete(phy->rphy);
478
479 transport_remove_device(dev);
480 device_del(dev);
481 transport_destroy_device(dev);
92aab646 482 put_device(dev);
c7ebbbce
CH		 483}
484EXPORT_SYMBOL(sas_phy_delete);
485
486/**
487 * scsi_is_sas_phy -- check if a struct device represents a SAS PHY
488 * @dev: device to check
489 *
490 * Returns:
491 * %1 if the device represents a SAS PHY, %0 else
492 */
493int scsi_is_sas_phy(const struct device *dev)
494{
495 return dev->release == sas_phy_release;
496}
497EXPORT_SYMBOL(scsi_is_sas_phy);
498
499/*
500 * SAS remote PHY attributes.
501 */
502
503#define sas_rphy_show_simple(field, name, format_string, cast) \
504static ssize_t \
505show_sas_rphy_##name(struct class_device *cdev, char *buf) \
506{ \
507 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
508 \
509 return snprintf(buf, 20, format_string, cast rphy->field); \
510}
511
512#define sas_rphy_simple_attr(field, name, format_string, type) \
513 sas_rphy_show_simple(field, name, format_string, (type)) \
514static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
515 show_sas_rphy_##name, NULL)
516
517#define sas_rphy_show_protocol(field, name) \
518static ssize_t \
519show_sas_rphy_##name(struct class_device *cdev, char *buf) \
520{ \
521 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
522 \
523 if (!rphy->field) \
524 return snprintf(buf, 20, "none\n"); \
525 return get_sas_protocol_names(rphy->field, buf); \
526}
527
528#define sas_rphy_protocol_attr(field, name) \
529 sas_rphy_show_protocol(field, name) \
530static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
531 show_sas_rphy_##name, NULL)
532
533static ssize_t
534show_sas_rphy_device_type(struct class_device *cdev, char *buf)
535{
536 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
537
538 if (!rphy->identify.device_type)
539 return snprintf(buf, 20, "none\n");
540 return get_sas_device_type_names(
541 rphy->identify.device_type, buf);
542}
543
544static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
545 show_sas_rphy_device_type, NULL);
546
a0125641
CH		 547static ssize_t
548show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf)
549{
550 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
551 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
552 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
553 struct sas_internal *i = to_sas_internal(shost->transportt);
554 u64 identifier;
555 int error;
556
557 /*
558 * Only devices behind an expander are supported, because the
559 * enclosure identifier is a SMP feature.
560 */
561 if (phy->local_attached)
562 return -EINVAL;
563
564 error = i->f->get_enclosure_identifier(rphy, &identifier);
565 if (error)
566 return error;
567 return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
568}
569
570static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
571 show_sas_rphy_enclosure_identifier, NULL);
572
573static ssize_t
574show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf)
575{
576 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
577 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
578 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
579 struct sas_internal *i = to_sas_internal(shost->transportt);
580 int val;
581
582 if (phy->local_attached)
583 return -EINVAL;
584
585 val = i->f->get_bay_identifier(rphy);
586 if (val < 0)
587 return val;
588 return sprintf(buf, "%d\n", val);
589}
590
591static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
592 show_sas_rphy_bay_identifier, NULL);
593
c7ebbbce
CH		 594sas_rphy_protocol_attr(identify.initiator_port_protocols,
595 initiator_port_protocols);
596sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
597sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
598 unsigned long long);
599sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
600
42ab0360
JB		 601/* only need 8 bytes of data plus header (4 or 8) */
602#define BUF_SIZE 64
603
604int sas_read_port_mode_page(struct scsi_device *sdev)
605{
606 char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
607 struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
608 struct sas_end_device *rdev;
609 struct scsi_mode_data mode_data;
610 int res, error;
611
612 BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
613
614 rdev = rphy_to_end_device(rphy);
615
616 if (!buffer)
617 return -ENOMEM;
618
619 res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
620 &mode_data, NULL);
621
622 error = -EINVAL;
623 if (!scsi_status_is_good(res))
624 goto out;
625
626 msdata = buffer + mode_data.header_length +
627 mode_data.block_descriptor_length;
628
629 if (msdata - buffer > BUF_SIZE - 8)
630 goto out;
631
632 error = 0;
633
634 rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
635 rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
636 rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
637
638 out:
639 kfree(buffer);
640 return error;
641}
642EXPORT_SYMBOL(sas_read_port_mode_page);
643
79cb1819
JB		 644static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
645 "sas_end_device", NULL, NULL, NULL);
646
42ab0360
JB		 647#define sas_end_dev_show_simple(field, name, format_string, cast) \
648static ssize_t \
649show_sas_end_dev_##name(struct class_device *cdev, char *buf) \
650{ \
651 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
652 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
653 \
654 return snprintf(buf, 20, format_string, cast rdev->field); \
655}
656
657#define sas_end_dev_simple_attr(field, name, format_string, type) \
658 sas_end_dev_show_simple(field, name, format_string, (type)) \
659static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
660 show_sas_end_dev_##name, NULL)
661
662sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
663sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
664 "%d\n", int);
665sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
666 "%d\n", int);
667
79cb1819
JB		 668static DECLARE_TRANSPORT_CLASS(sas_expander_class,
669 "sas_expander", NULL, NULL, NULL);
670
671#define sas_expander_show_simple(field, name, format_string, cast) \
672static ssize_t \
673show_sas_expander_##name(struct class_device *cdev, char *buf) \
674{ \
675 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
676 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
677 \
678 return snprintf(buf, 20, format_string, cast edev->field); \
679}
680
681#define sas_expander_simple_attr(field, name, format_string, type) \
682 sas_expander_show_simple(field, name, format_string, (type)) \
683static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO, \
684 show_sas_expander_##name, NULL)
685
686sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
687sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
688sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
689sas_expander_simple_attr(component_vendor_id, component_vendor_id,
690 "%s\n", char *);
691sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
692sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
693 unsigned int);
694sas_expander_simple_attr(level, level, "%d\n", int);
42ab0360 695
c7ebbbce 696static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
2f8600df 697 "sas_device", NULL, NULL, NULL);
c7ebbbce
CH		 698
699static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
700{
701 struct Scsi_Host *shost;
702 struct sas_internal *i;
703
704 if (!scsi_is_sas_rphy(dev))
705 return 0;
706 shost = dev_to_shost(dev->parent->parent);
707
708 if (!shost->transportt)
709 return 0;
710 if (shost->transportt->host_attrs.ac.class !=
711 &sas_host_class.class)
712 return 0;
713
714 i = to_sas_internal(shost->transportt);
715 return &i->rphy_attr_cont.ac == cont;
716}
717
42ab0360
JB		 718static int sas_end_dev_match(struct attribute_container *cont,
719 struct device *dev)
720{
721 struct Scsi_Host *shost;
722 struct sas_internal *i;
723 struct sas_rphy *rphy;
724
725 if (!scsi_is_sas_rphy(dev))
726 return 0;
727 shost = dev_to_shost(dev->parent->parent);
728 rphy = dev_to_rphy(dev);
729
730 if (!shost->transportt)
731 return 0;
732 if (shost->transportt->host_attrs.ac.class !=
733 &sas_host_class.class)
734 return 0;
735
736 i = to_sas_internal(shost->transportt);
737 return &i->end_dev_attr_cont.ac == cont &&
2f8600df 738 rphy->identify.device_type == SAS_END_DEVICE;
42ab0360
JB		 739}
740
79cb1819
JB		 741static int sas_expander_match(struct attribute_container *cont,
742 struct device *dev)
743{
744 struct Scsi_Host *shost;
745 struct sas_internal *i;
746 struct sas_rphy *rphy;
747
748 if (!scsi_is_sas_rphy(dev))
749 return 0;
750 shost = dev_to_shost(dev->parent->parent);
751 rphy = dev_to_rphy(dev);
752
753 if (!shost->transportt)
754 return 0;
755 if (shost->transportt->host_attrs.ac.class !=
756 &sas_host_class.class)
757 return 0;
758
759 i = to_sas_internal(shost->transportt);
760 return &i->expander_attr_cont.ac == cont &&
761 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
2f8600df 762 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
79cb1819
JB		 763}
764
2f8600df 765static void sas_expander_release(struct device *dev)
c7ebbbce
CH		 766{
767 struct sas_rphy *rphy = dev_to_rphy(dev);
2f8600df 768 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
c7ebbbce
CH		 769
770 put_device(dev->parent);
2f8600df 771 kfree(edev);
c7ebbbce
CH		 772}
773
2f8600df 774static void sas_end_device_release(struct device *dev)
c7ebbbce 775{
2f8600df
JB		 776 struct sas_rphy *rphy = dev_to_rphy(dev);
777 struct sas_end_device *edev = rphy_to_end_device(rphy);
c7ebbbce 778
2f8600df
JB		 779 put_device(dev->parent);
780 kfree(edev);
c7ebbbce 781}
c7ebbbce 782
42ab0360
JB		 783/**
784 * sas_end_device_alloc - allocate an rphy for an end device
785 *
786 * Allocates an SAS remote PHY structure, connected to @parent.
787 *
788 * Returns:
789 * SAS PHY allocated or %NULL if the allocation failed.
790 */
791struct sas_rphy *sas_end_device_alloc(struct sas_phy *parent)
792{
793 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
794 struct sas_end_device *rdev;
795
796 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
797 if (!rdev) {
42ab0360
JB		 798 return NULL;
799 }
800
801 device_initialize(&rdev->rphy.dev);
802 rdev->rphy.dev.parent = get_device(&parent->dev);
2f8600df
JB		 803 rdev->rphy.dev.release = sas_end_device_release;
804 sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d-%d",
42ab0360
JB		 805 shost->host_no, parent->port_identifier, parent->number);
806 rdev->rphy.identify.device_type = SAS_END_DEVICE;
42ab0360
JB		 807 transport_setup_device(&rdev->rphy.dev);
808
809 return &rdev->rphy;
810}
811EXPORT_SYMBOL(sas_end_device_alloc);
812
79cb1819
JB		 813/**
814 * sas_expander_alloc - allocate an rphy for an end device
815 *
816 * Allocates an SAS remote PHY structure, connected to @parent.
817 *
818 * Returns:
819 * SAS PHY allocated or %NULL if the allocation failed.
820 */
821struct sas_rphy *sas_expander_alloc(struct sas_phy *parent,
822 enum sas_device_type type)
823{
824 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
825 struct sas_expander_device *rdev;
826 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
827
828 BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
829 type != SAS_FANOUT_EXPANDER_DEVICE);
830
831 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
832 if (!rdev) {
79cb1819
JB		 833 return NULL;
834 }
835
836 device_initialize(&rdev->rphy.dev);
837 rdev->rphy.dev.parent = get_device(&parent->dev);
2f8600df 838 rdev->rphy.dev.release = sas_expander_release;
79cb1819
JB		 839 mutex_lock(&sas_host->lock);
840 rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
841 mutex_unlock(&sas_host->lock);
842 sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d",
843 shost->host_no, rdev->rphy.scsi_target_id);
844 rdev->rphy.identify.device_type = type;
79cb1819
JB		 845 transport_setup_device(&rdev->rphy.dev);
846
847 return &rdev->rphy;
848}
849EXPORT_SYMBOL(sas_expander_alloc);
42ab0360 850
c7ebbbce
CH		 851/**
852 * sas_rphy_add -- add a SAS remote PHY to the device hierachy
853 * @rphy: The remote PHY to be added
854 *
855 * Publishes a SAS remote PHY to the rest of the system.
856 */
857int sas_rphy_add(struct sas_rphy *rphy)
858{
859 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
860 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
861 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
862 struct sas_identify *identify = &rphy->identify;
863 int error;
864
865 if (parent->rphy)
866 return -ENXIO;
867 parent->rphy = rphy;
868
869 error = device_add(&rphy->dev);
870 if (error)
871 return error;
872 transport_add_device(&rphy->dev);
873 transport_configure_device(&rphy->dev);
874
e02f3f59 875 mutex_lock(&sas_host->lock);
c7ebbbce
CH		 876 list_add_tail(&rphy->list, &sas_host->rphy_list);
877 if (identify->device_type == SAS_END_DEVICE &&
878 (identify->target_port_protocols &
879 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
880 rphy->scsi_target_id = sas_host->next_target_id++;
e02f3f59 881 mutex_unlock(&sas_host->lock);
c7ebbbce 882
79cb1819
JB		 883 if (identify->device_type == SAS_END_DEVICE &&
884 rphy->scsi_target_id != -1) {
e6bc863c 885 scsi_scan_target(&rphy->dev, parent->port_identifier,
c7ebbbce
CH		 886 rphy->scsi_target_id, ~0, 0);
887 }
888
889 return 0;
890}
891EXPORT_SYMBOL(sas_rphy_add);
892
893/**
894 * sas_rphy_free -- free a SAS remote PHY
895 * @rphy SAS remote PHY to free
896 *
897 * Frees the specified SAS remote PHY.
898 *
899 * Note:
900 * This function must only be called on a remote
901 * PHY that has not sucessfully been added using
902 * sas_rphy_add().
903 */
904void sas_rphy_free(struct sas_rphy *rphy)
905{
92aab646 906 struct device *dev = &rphy->dev;
c7ebbbce
CH		 907 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
908 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
909
e02f3f59 910 mutex_lock(&sas_host->lock);
c7ebbbce 911 list_del(&rphy->list);
e02f3f59 912 mutex_unlock(&sas_host->lock);
c7ebbbce 913
92aab646 914 transport_destroy_device(dev);
2f8600df 915
92aab646 916 put_device(dev);
c7ebbbce
CH		 917}
918EXPORT_SYMBOL(sas_rphy_free);
919
920/**
921 * sas_rphy_delete -- remove SAS remote PHY
922 * @rphy: SAS remote PHY to remove
923 *
924 * Removes the specified SAS remote PHY.
925 */
926void
927sas_rphy_delete(struct sas_rphy *rphy)
928{
929 struct device *dev = &rphy->dev;
930 struct sas_phy *parent = dev_to_phy(dev->parent);
931 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
932 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
933
d4054239
CH		 934 switch (rphy->identify.device_type) {
935 case SAS_END_DEVICE:
936 scsi_remove_target(dev);
937 break;
938 case SAS_EDGE_EXPANDER_DEVICE:
939 case SAS_FANOUT_EXPANDER_DEVICE:
940 device_for_each_child(dev, NULL, do_sas_phy_delete);
941 break;
942 default:
943 break;
944 }
c7ebbbce 945
fe8b2304
CH		 946 transport_remove_device(dev);
947 device_del(dev);
948 transport_destroy_device(dev);
c7ebbbce 949
e02f3f59 950 mutex_lock(&sas_host->lock);
c7ebbbce 951 list_del(&rphy->list);
e02f3f59 952 mutex_unlock(&sas_host->lock);
c7ebbbce 953
33b114e9
CH		 954 parent->rphy = NULL;
955
92aab646 956 put_device(dev);
c7ebbbce
CH		 957}
958EXPORT_SYMBOL(sas_rphy_delete);
959
960/**
961 * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
962 * @dev: device to check
963 *
964 * Returns:
965 * %1 if the device represents a SAS remote PHY, %0 else
966 */
967int scsi_is_sas_rphy(const struct device *dev)
968{
2f8600df
JB		 969 return dev->release == sas_end_device_release ||
970 dev->release == sas_expander_release;
c7ebbbce
CH		 971}
972EXPORT_SYMBOL(scsi_is_sas_rphy);
973
974
975/*
976 * SCSI scan helper
977 */
978
e02f3f59
CH		 979static int sas_user_scan(struct Scsi_Host *shost, uint channel,
980 uint id, uint lun)
c7ebbbce
CH		 981{
982 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
983 struct sas_rphy *rphy;
c7ebbbce 984
e02f3f59 985 mutex_lock(&sas_host->lock);
c7ebbbce
CH		 986 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
987 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
e02f3f59
CH		 988
989 if (rphy->scsi_target_id == -1)
990 continue;
991
e6bc863c 992 if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) &&
e02f3f59 993 (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
e6bc863c 994 scsi_scan_target(&rphy->dev, parent->port_identifier,
e02f3f59
CH		 995 rphy->scsi_target_id, lun, 1);
996 }
c7ebbbce 997 }
e02f3f59 998 mutex_unlock(&sas_host->lock);
c7ebbbce 999
e02f3f59 1000 return 0;
c7ebbbce
CH		 1001}
1002
1003
1004/*
1005 * Setup / Teardown code
1006 */
1007
42ab0360
JB		 1008#define SETUP_TEMPLATE(attrb, field, perm, test) \
1009 i->private_##attrb[count] = class_device_attr_##field; \
1010 i->private_##attrb[count].attr.mode = perm; \
1011 i->private_##attrb[count].store = NULL; \
1012 i->attrb[count] = &i->private_##attrb[count]; \
1013 if (test) \
1014 count++
1015
1016
1017#define SETUP_RPORT_ATTRIBUTE(field) \
1018 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
c7ebbbce 1019
dd9fbb52 1020#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
42ab0360 1021 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
dd9fbb52 1022
c7ebbbce 1023#define SETUP_PORT_ATTRIBUTE(field) \
42ab0360 1024 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
c7ebbbce 1025
dd9fbb52 1026#define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func) \
42ab0360 1027 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
dd9fbb52 1028
07ba3a95 1029#define SETUP_PORT_ATTRIBUTE_WRONLY(field) \
42ab0360 1030 SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)
07ba3a95 1031
dd9fbb52 1032#define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func) \
42ab0360 1033 SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)
dd9fbb52 1034
42ab0360
JB		 1035#define SETUP_END_DEV_ATTRIBUTE(field) \
1036 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
c7ebbbce 1037
79cb1819
JB		 1038#define SETUP_EXPANDER_ATTRIBUTE(field) \
1039 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1040
c7ebbbce
CH		 1041/**
1042 * sas_attach_transport -- instantiate SAS transport template
1043 * @ft: SAS transport class function template
1044 */
1045struct scsi_transport_template *
1046sas_attach_transport(struct sas_function_template *ft)
1047{
1048 struct sas_internal *i;
1049 int count;
1050
24669f75 1051 i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
c7ebbbce
CH		 1052 if (!i)
1053 return NULL;
c7ebbbce 1054
e02f3f59 1055 i->t.user_scan = sas_user_scan;
c7ebbbce
CH		 1056
1057 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1058 i->t.host_attrs.ac.class = &sas_host_class.class;
1059 i->t.host_attrs.ac.match = sas_host_match;
1060 transport_container_register(&i->t.host_attrs);
1061 i->t.host_size = sizeof(struct sas_host_attrs);
1062
1063 i->phy_attr_cont.ac.class = &sas_phy_class.class;
1064 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1065 i->phy_attr_cont.ac.match = sas_phy_match;
1066 transport_container_register(&i->phy_attr_cont);
1067
1068 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1069 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1070 i->rphy_attr_cont.ac.match = sas_rphy_match;
1071 transport_container_register(&i->rphy_attr_cont);
1072
42ab0360
JB		 1073 i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1074 i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1075 i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1076 transport_container_register(&i->end_dev_attr_cont);
1077
79cb1819
JB		 1078 i->expander_attr_cont.ac.class = &sas_expander_class.class;
1079 i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1080 i->expander_attr_cont.ac.match = sas_expander_match;
1081 transport_container_register(&i->expander_attr_cont);
1082
c7ebbbce
CH		 1083 i->f = ft;
1084
1085 count = 0;
1086 i->host_attrs[count] = NULL;
1087
1088 count = 0;
1089 SETUP_PORT_ATTRIBUTE(initiator_port_protocols);
1090 SETUP_PORT_ATTRIBUTE(target_port_protocols);
1091 SETUP_PORT_ATTRIBUTE(device_type);
1092 SETUP_PORT_ATTRIBUTE(sas_address);
1093 SETUP_PORT_ATTRIBUTE(phy_identifier);
1094 SETUP_PORT_ATTRIBUTE(port_identifier);
1095 SETUP_PORT_ATTRIBUTE(negotiated_linkrate);
1096 SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw);
1097 SETUP_PORT_ATTRIBUTE(minimum_linkrate);
1098 SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);
1099 SETUP_PORT_ATTRIBUTE(maximum_linkrate);
c3ee74c4
CH		 1100
1101 SETUP_PORT_ATTRIBUTE(invalid_dword_count);
1102 SETUP_PORT_ATTRIBUTE(running_disparity_error_count);
1103 SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count);
1104 SETUP_PORT_ATTRIBUTE(phy_reset_problem_count);
dd9fbb52
JB		 1105 SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1106 SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
c7ebbbce
CH		 1107 i->phy_attrs[count] = NULL;
1108
1109 count = 0;
1110 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1111 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1112 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1113 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1114 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
dd9fbb52
JB		 1115 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1116 get_enclosure_identifier);
1117 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1118 get_bay_identifier);
c7ebbbce
CH		 1119 i->rphy_attrs[count] = NULL;
1120
42ab0360
JB		 1121 count = 0;
1122 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1123 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1124 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1125 i->end_dev_attrs[count] = NULL;
1126
79cb1819
JB		 1127 count = 0;
1128 SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1129 SETUP_EXPANDER_ATTRIBUTE(product_id);
1130 SETUP_EXPANDER_ATTRIBUTE(product_rev);
1131 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1132 SETUP_EXPANDER_ATTRIBUTE(component_id);
1133 SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1134 SETUP_EXPANDER_ATTRIBUTE(level);
1135 i->expander_attrs[count] = NULL;
1136
c7ebbbce
CH		 1137 return &i->t;
1138}
1139EXPORT_SYMBOL(sas_attach_transport);
1140
1141/**
1142 * sas_release_transport -- release SAS transport template instance
1143 * @t: transport template instance
1144 */
1145void sas_release_transport(struct scsi_transport_template *t)
1146{
1147 struct sas_internal *i = to_sas_internal(t);
1148
1149 transport_container_unregister(&i->t.host_attrs);
1150 transport_container_unregister(&i->phy_attr_cont);
1151 transport_container_unregister(&i->rphy_attr_cont);
db82f841 1152 transport_container_unregister(&i->end_dev_attr_cont);
79cb1819 1153 transport_container_unregister(&i->expander_attr_cont);
c7ebbbce
CH		 1154
1155 kfree(i);
1156}
1157EXPORT_SYMBOL(sas_release_transport);
1158
1159static __init int sas_transport_init(void)
1160{
1161 int error;
1162
1163 error = transport_class_register(&sas_host_class);
1164 if (error)
1165 goto out;
1166 error = transport_class_register(&sas_phy_class);
1167 if (error)
1168 goto out_unregister_transport;
1169 error = transport_class_register(&sas_rphy_class);
1170 if (error)
1171 goto out_unregister_phy;
42ab0360
JB		 1172 error = transport_class_register(&sas_end_dev_class);
1173 if (error)
1174 goto out_unregister_rphy;
79cb1819
JB		 1175 error = transport_class_register(&sas_expander_class);
1176 if (error)
1177 goto out_unregister_end_dev;
c7ebbbce
CH		 1178
1179 return 0;
1180
79cb1819
JB		 1181 out_unregister_end_dev:
1182 transport_class_unregister(&sas_end_dev_class);
42ab0360
JB		 1183 out_unregister_rphy:
1184 transport_class_unregister(&sas_rphy_class);
c7ebbbce
CH		 1185 out_unregister_phy:
1186 transport_class_unregister(&sas_phy_class);
1187 out_unregister_transport:
1188 transport_class_unregister(&sas_host_class);
1189 out:
1190 return error;
1191
1192}
1193
1194static void __exit sas_transport_exit(void)
1195{
1196 transport_class_unregister(&sas_host_class);
1197 transport_class_unregister(&sas_phy_class);
1198 transport_class_unregister(&sas_rphy_class);
42ab0360 1199 transport_class_unregister(&sas_end_dev_class);
79cb1819 1200 transport_class_unregister(&sas_expander_class);
c7ebbbce
CH		 1201}
1202
1203MODULE_AUTHOR("Christoph Hellwig");
1204MODULE_DESCRIPTION("SAS Transphy Attributes");
1205MODULE_LICENSE("GPL");
1206
1207module_init(sas_transport_init);
1208module_exit(sas_transport_exit);
Linux kernel - Deliverables
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