Commit | Line | Data |
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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 | ||
d6159c17 | 38 | #include "scsi_sas_internal.h" |
c7ebbbce CH |
39 | struct sas_host_attrs { |
40 | struct list_head rphy_list; | |
e02f3f59 | 41 | struct mutex lock; |
c7ebbbce | 42 | u32 next_target_id; |
79cb1819 | 43 | u32 next_expander_id; |
c9fefeb2 | 44 | int next_port_id; |
c7ebbbce CH |
45 | }; |
46 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) | |
47 | ||
48 | ||
49 | /* | |
50 | * Hack to allow attributes of the same name in different objects. | |
51 | */ | |
52 | #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
53 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
54 | __ATTR(_name,_mode,_show,_store) | |
55 | ||
56 | ||
57 | /* | |
58 | * Pretty printing helpers | |
59 | */ | |
60 | ||
61 | #define sas_bitfield_name_match(title, table) \ | |
62 | static ssize_t \ | |
63 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
64 | { \ | |
65 | char *prefix = ""; \ | |
66 | ssize_t len = 0; \ | |
67 | int i; \ | |
68 | \ | |
6391a113 | 69 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
c7ebbbce CH |
70 | if (table[i].value & table_key) { \ |
71 | len += sprintf(buf + len, "%s%s", \ | |
72 | prefix, table[i].name); \ | |
73 | prefix = ", "; \ | |
74 | } \ | |
75 | } \ | |
76 | len += sprintf(buf + len, "\n"); \ | |
77 | return len; \ | |
78 | } | |
79 | ||
80 | #define sas_bitfield_name_search(title, table) \ | |
81 | static ssize_t \ | |
82 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
83 | { \ | |
84 | ssize_t len = 0; \ | |
85 | int i; \ | |
86 | \ | |
6391a113 | 87 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
c7ebbbce CH |
88 | if (table[i].value == table_key) { \ |
89 | len += sprintf(buf + len, "%s", \ | |
90 | table[i].name); \ | |
91 | break; \ | |
92 | } \ | |
93 | } \ | |
94 | len += sprintf(buf + len, "\n"); \ | |
95 | return len; \ | |
96 | } | |
97 | ||
98 | static struct { | |
99 | u32 value; | |
100 | char *name; | |
101 | } sas_device_type_names[] = { | |
102 | { SAS_PHY_UNUSED, "unused" }, | |
103 | { SAS_END_DEVICE, "end device" }, | |
104 | { SAS_EDGE_EXPANDER_DEVICE, "edge expander" }, | |
105 | { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" }, | |
106 | }; | |
107 | sas_bitfield_name_search(device_type, sas_device_type_names) | |
108 | ||
109 | ||
110 | static struct { | |
111 | u32 value; | |
112 | char *name; | |
113 | } sas_protocol_names[] = { | |
114 | { SAS_PROTOCOL_SATA, "sata" }, | |
115 | { SAS_PROTOCOL_SMP, "smp" }, | |
116 | { SAS_PROTOCOL_STP, "stp" }, | |
117 | { SAS_PROTOCOL_SSP, "ssp" }, | |
118 | }; | |
119 | sas_bitfield_name_match(protocol, sas_protocol_names) | |
120 | ||
121 | static struct { | |
122 | u32 value; | |
123 | char *name; | |
124 | } sas_linkspeed_names[] = { | |
125 | { SAS_LINK_RATE_UNKNOWN, "Unknown" }, | |
126 | { SAS_PHY_DISABLED, "Phy disabled" }, | |
127 | { SAS_LINK_RATE_FAILED, "Link Rate failed" }, | |
128 | { SAS_SATA_SPINUP_HOLD, "Spin-up hold" }, | |
129 | { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" }, | |
130 | { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" }, | |
7e6dff62 | 131 | { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" }, |
c7ebbbce CH |
132 | }; |
133 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) | |
134 | ||
135 | ||
136 | /* | |
137 | * SAS host attributes | |
138 | */ | |
139 | ||
37be6eeb JB |
140 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
141 | struct class_device *cdev) | |
c7ebbbce CH |
142 | { |
143 | struct Scsi_Host *shost = dev_to_shost(dev); | |
144 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
145 | ||
146 | INIT_LIST_HEAD(&sas_host->rphy_list); | |
e02f3f59 | 147 | mutex_init(&sas_host->lock); |
c7ebbbce | 148 | sas_host->next_target_id = 0; |
79cb1819 | 149 | sas_host->next_expander_id = 0; |
c9fefeb2 | 150 | sas_host->next_port_id = 0; |
c7ebbbce CH |
151 | return 0; |
152 | } | |
153 | ||
154 | static DECLARE_TRANSPORT_CLASS(sas_host_class, | |
155 | "sas_host", sas_host_setup, NULL, NULL); | |
156 | ||
157 | static int sas_host_match(struct attribute_container *cont, | |
158 | struct device *dev) | |
159 | { | |
160 | struct Scsi_Host *shost; | |
161 | struct sas_internal *i; | |
162 | ||
163 | if (!scsi_is_host_device(dev)) | |
164 | return 0; | |
165 | shost = dev_to_shost(dev); | |
166 | ||
167 | if (!shost->transportt) | |
168 | return 0; | |
169 | if (shost->transportt->host_attrs.ac.class != | |
170 | &sas_host_class.class) | |
171 | return 0; | |
172 | ||
173 | i = to_sas_internal(shost->transportt); | |
174 | return &i->t.host_attrs.ac == cont; | |
175 | } | |
176 | ||
177 | static int do_sas_phy_delete(struct device *dev, void *data) | |
178 | { | |
65c92b09 JB |
179 | int pass = (int)(unsigned long)data; |
180 | ||
181 | if (pass == 0 && scsi_is_sas_port(dev)) | |
182 | sas_port_delete(dev_to_sas_port(dev)); | |
183 | else if (pass == 1 && scsi_is_sas_phy(dev)) | |
c7ebbbce CH |
184 | sas_phy_delete(dev_to_phy(dev)); |
185 | return 0; | |
186 | } | |
187 | ||
65c92b09 JB |
188 | /** |
189 | * sas_remove_children -- tear down a devices SAS data structures | |
190 | * @dev: device belonging to the sas object | |
191 | * | |
192 | * Removes all SAS PHYs and remote PHYs for a given object | |
193 | */ | |
194 | void sas_remove_children(struct device *dev) | |
195 | { | |
196 | device_for_each_child(dev, (void *)0, do_sas_phy_delete); | |
197 | device_for_each_child(dev, (void *)1, do_sas_phy_delete); | |
198 | } | |
199 | EXPORT_SYMBOL(sas_remove_children); | |
200 | ||
c7ebbbce CH |
201 | /** |
202 | * sas_remove_host -- tear down a Scsi_Host's SAS data structures | |
203 | * @shost: Scsi Host that is torn down | |
204 | * | |
205 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host. | |
206 | * Must be called just before scsi_remove_host for SAS HBAs. | |
207 | */ | |
208 | void sas_remove_host(struct Scsi_Host *shost) | |
209 | { | |
65c92b09 | 210 | sas_remove_children(&shost->shost_gendev); |
c7ebbbce CH |
211 | } |
212 | EXPORT_SYMBOL(sas_remove_host); | |
213 | ||
214 | ||
215 | /* | |
65c92b09 | 216 | * SAS Phy attributes |
c7ebbbce CH |
217 | */ |
218 | ||
219 | #define sas_phy_show_simple(field, name, format_string, cast) \ | |
220 | static ssize_t \ | |
221 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
222 | { \ | |
223 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
224 | \ | |
225 | return snprintf(buf, 20, format_string, cast phy->field); \ | |
226 | } | |
227 | ||
228 | #define sas_phy_simple_attr(field, name, format_string, type) \ | |
229 | sas_phy_show_simple(field, name, format_string, (type)) \ | |
230 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
231 | ||
232 | #define sas_phy_show_protocol(field, name) \ | |
233 | static ssize_t \ | |
234 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
235 | { \ | |
236 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
237 | \ | |
238 | if (!phy->field) \ | |
239 | return snprintf(buf, 20, "none\n"); \ | |
240 | return get_sas_protocol_names(phy->field, buf); \ | |
241 | } | |
242 | ||
243 | #define sas_phy_protocol_attr(field, name) \ | |
244 | sas_phy_show_protocol(field, name) \ | |
245 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
246 | ||
247 | #define sas_phy_show_linkspeed(field) \ | |
248 | static ssize_t \ | |
249 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
250 | { \ | |
251 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
252 | \ | |
253 | return get_sas_linkspeed_names(phy->field, buf); \ | |
254 | } | |
255 | ||
256 | #define sas_phy_linkspeed_attr(field) \ | |
257 | sas_phy_show_linkspeed(field) \ | |
258 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
259 | ||
c3ee74c4 CH |
260 | #define sas_phy_show_linkerror(field) \ |
261 | static ssize_t \ | |
262 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
263 | { \ | |
264 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
265 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ | |
266 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
267 | int error; \ | |
268 | \ | |
ac01bbbd CH |
269 | if (!phy->local_attached) \ |
270 | return -EINVAL; \ | |
271 | \ | |
dd9fbb52 | 272 | error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \ |
c3ee74c4 CH |
273 | if (error) \ |
274 | return error; \ | |
275 | return snprintf(buf, 20, "%u\n", phy->field); \ | |
276 | } | |
277 | ||
278 | #define sas_phy_linkerror_attr(field) \ | |
279 | sas_phy_show_linkerror(field) \ | |
280 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
281 | ||
282 | ||
c7ebbbce CH |
283 | static ssize_t |
284 | show_sas_device_type(struct class_device *cdev, char *buf) | |
285 | { | |
286 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
287 | ||
288 | if (!phy->identify.device_type) | |
289 | return snprintf(buf, 20, "none\n"); | |
290 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
291 | } | |
c7ebbbce CH |
292 | static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
293 | ||
07ba3a95 CH |
294 | static ssize_t do_sas_phy_reset(struct class_device *cdev, |
295 | size_t count, int hard_reset) | |
296 | { | |
297 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
298 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
299 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
300 | int error; | |
301 | ||
302 | if (!phy->local_attached) | |
303 | return -EINVAL; | |
304 | ||
305 | error = i->f->phy_reset(phy, hard_reset); | |
306 | if (error) | |
307 | return error; | |
308 | return count; | |
309 | }; | |
310 | ||
311 | static ssize_t store_sas_link_reset(struct class_device *cdev, | |
312 | const char *buf, size_t count) | |
313 | { | |
314 | return do_sas_phy_reset(cdev, count, 0); | |
315 | } | |
316 | static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); | |
317 | ||
318 | static ssize_t store_sas_hard_reset(struct class_device *cdev, | |
319 | const char *buf, size_t count) | |
320 | { | |
321 | return do_sas_phy_reset(cdev, count, 1); | |
322 | } | |
323 | static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); | |
324 | ||
c7ebbbce CH |
325 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
326 | initiator_port_protocols); | |
327 | sas_phy_protocol_attr(identify.target_port_protocols, | |
328 | target_port_protocols); | |
329 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
330 | unsigned long long); | |
331 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
c9fefeb2 | 332 | //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int); |
c7ebbbce CH |
333 | sas_phy_linkspeed_attr(negotiated_linkrate); |
334 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
335 | sas_phy_linkspeed_attr(minimum_linkrate); | |
336 | sas_phy_linkspeed_attr(maximum_linkrate_hw); | |
337 | sas_phy_linkspeed_attr(maximum_linkrate); | |
c3ee74c4 CH |
338 | sas_phy_linkerror_attr(invalid_dword_count); |
339 | sas_phy_linkerror_attr(running_disparity_error_count); | |
340 | sas_phy_linkerror_attr(loss_of_dword_sync_count); | |
341 | sas_phy_linkerror_attr(phy_reset_problem_count); | |
c7ebbbce CH |
342 | |
343 | ||
344 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
345 | "sas_phy", NULL, NULL, NULL); | |
346 | ||
347 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
348 | { | |
349 | struct Scsi_Host *shost; | |
350 | struct sas_internal *i; | |
351 | ||
352 | if (!scsi_is_sas_phy(dev)) | |
353 | return 0; | |
354 | shost = dev_to_shost(dev->parent); | |
355 | ||
356 | if (!shost->transportt) | |
357 | return 0; | |
358 | if (shost->transportt->host_attrs.ac.class != | |
359 | &sas_host_class.class) | |
360 | return 0; | |
361 | ||
362 | i = to_sas_internal(shost->transportt); | |
363 | return &i->phy_attr_cont.ac == cont; | |
364 | } | |
365 | ||
366 | static void sas_phy_release(struct device *dev) | |
367 | { | |
368 | struct sas_phy *phy = dev_to_phy(dev); | |
369 | ||
370 | put_device(dev->parent); | |
371 | kfree(phy); | |
372 | } | |
373 | ||
374 | /** | |
375 | * sas_phy_alloc -- allocates and initialize a SAS PHY structure | |
376 | * @parent: Parent device | |
d99ca418 | 377 | * @number: Phy index |
c7ebbbce CH |
378 | * |
379 | * Allocates an SAS PHY structure. It will be added in the device tree | |
380 | * below the device specified by @parent, which has to be either a Scsi_Host | |
381 | * or sas_rphy. | |
382 | * | |
383 | * Returns: | |
384 | * SAS PHY allocated or %NULL if the allocation failed. | |
385 | */ | |
386 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
387 | { | |
388 | struct Scsi_Host *shost = dev_to_shost(parent); | |
389 | struct sas_phy *phy; | |
390 | ||
24669f75 | 391 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); |
c7ebbbce CH |
392 | if (!phy) |
393 | return NULL; | |
c7ebbbce | 394 | |
c7ebbbce CH |
395 | phy->number = number; |
396 | ||
397 | device_initialize(&phy->dev); | |
398 | phy->dev.parent = get_device(parent); | |
399 | phy->dev.release = sas_phy_release; | |
65c92b09 | 400 | INIT_LIST_HEAD(&phy->port_siblings); |
79cb1819 JB |
401 | if (scsi_is_sas_expander_device(parent)) { |
402 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
65c92b09 | 403 | sprintf(phy->dev.bus_id, "phy-%d:%d:%d", shost->host_no, |
79cb1819 JB |
404 | rphy->scsi_target_id, number); |
405 | } else | |
406 | sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); | |
c7ebbbce CH |
407 | |
408 | transport_setup_device(&phy->dev); | |
409 | ||
410 | return phy; | |
411 | } | |
412 | EXPORT_SYMBOL(sas_phy_alloc); | |
413 | ||
414 | /** | |
415 | * sas_phy_add -- add a SAS PHY to the device hierachy | |
416 | * @phy: The PHY to be added | |
417 | * | |
418 | * Publishes a SAS PHY to the rest of the system. | |
419 | */ | |
420 | int sas_phy_add(struct sas_phy *phy) | |
421 | { | |
422 | int error; | |
423 | ||
424 | error = device_add(&phy->dev); | |
425 | if (!error) { | |
426 | transport_add_device(&phy->dev); | |
427 | transport_configure_device(&phy->dev); | |
428 | } | |
429 | ||
430 | return error; | |
431 | } | |
432 | EXPORT_SYMBOL(sas_phy_add); | |
433 | ||
434 | /** | |
435 | * sas_phy_free -- free a SAS PHY | |
436 | * @phy: SAS PHY to free | |
437 | * | |
438 | * Frees the specified SAS PHY. | |
439 | * | |
440 | * Note: | |
441 | * This function must only be called on a PHY that has not | |
442 | * sucessfully been added using sas_phy_add(). | |
443 | */ | |
444 | void sas_phy_free(struct sas_phy *phy) | |
445 | { | |
446 | transport_destroy_device(&phy->dev); | |
92aab646 | 447 | put_device(&phy->dev); |
c7ebbbce CH |
448 | } |
449 | EXPORT_SYMBOL(sas_phy_free); | |
450 | ||
451 | /** | |
452 | * sas_phy_delete -- remove SAS PHY | |
453 | * @phy: SAS PHY to remove | |
454 | * | |
455 | * Removes the specified SAS PHY. If the SAS PHY has an | |
456 | * associated remote PHY it is removed before. | |
457 | */ | |
458 | void | |
459 | sas_phy_delete(struct sas_phy *phy) | |
460 | { | |
461 | struct device *dev = &phy->dev; | |
462 | ||
65c92b09 JB |
463 | /* this happens if the phy is still part of a port when deleted */ |
464 | BUG_ON(!list_empty(&phy->port_siblings)); | |
c7ebbbce CH |
465 | |
466 | transport_remove_device(dev); | |
467 | device_del(dev); | |
468 | transport_destroy_device(dev); | |
92aab646 | 469 | put_device(dev); |
c7ebbbce CH |
470 | } |
471 | EXPORT_SYMBOL(sas_phy_delete); | |
472 | ||
473 | /** | |
474 | * scsi_is_sas_phy -- check if a struct device represents a SAS PHY | |
475 | * @dev: device to check | |
476 | * | |
477 | * Returns: | |
478 | * %1 if the device represents a SAS PHY, %0 else | |
479 | */ | |
480 | int scsi_is_sas_phy(const struct device *dev) | |
481 | { | |
482 | return dev->release == sas_phy_release; | |
483 | } | |
484 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
485 | ||
65c92b09 JB |
486 | /* |
487 | * SAS Port attributes | |
488 | */ | |
489 | #define sas_port_show_simple(field, name, format_string, cast) \ | |
490 | static ssize_t \ | |
491 | show_sas_port_##name(struct class_device *cdev, char *buf) \ | |
492 | { \ | |
493 | struct sas_port *port = transport_class_to_sas_port(cdev); \ | |
494 | \ | |
495 | return snprintf(buf, 20, format_string, cast port->field); \ | |
496 | } | |
497 | ||
498 | #define sas_port_simple_attr(field, name, format_string, type) \ | |
499 | sas_port_show_simple(field, name, format_string, (type)) \ | |
500 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL) | |
501 | ||
502 | sas_port_simple_attr(num_phys, num_phys, "%d\n", int); | |
503 | ||
504 | static DECLARE_TRANSPORT_CLASS(sas_port_class, | |
505 | "sas_port", NULL, NULL, NULL); | |
506 | ||
507 | static int sas_port_match(struct attribute_container *cont, struct device *dev) | |
508 | { | |
509 | struct Scsi_Host *shost; | |
510 | struct sas_internal *i; | |
511 | ||
512 | if (!scsi_is_sas_port(dev)) | |
513 | return 0; | |
514 | shost = dev_to_shost(dev->parent); | |
515 | ||
516 | if (!shost->transportt) | |
517 | return 0; | |
518 | if (shost->transportt->host_attrs.ac.class != | |
519 | &sas_host_class.class) | |
520 | return 0; | |
521 | ||
522 | i = to_sas_internal(shost->transportt); | |
523 | return &i->port_attr_cont.ac == cont; | |
524 | } | |
525 | ||
526 | ||
527 | static void sas_port_release(struct device *dev) | |
528 | { | |
529 | struct sas_port *port = dev_to_sas_port(dev); | |
530 | ||
531 | BUG_ON(!list_empty(&port->phy_list)); | |
532 | ||
533 | put_device(dev->parent); | |
534 | kfree(port); | |
535 | } | |
536 | ||
537 | static void sas_port_create_link(struct sas_port *port, | |
538 | struct sas_phy *phy) | |
539 | { | |
540 | sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, phy->dev.bus_id); | |
541 | sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port"); | |
542 | } | |
543 | ||
544 | static void sas_port_delete_link(struct sas_port *port, | |
545 | struct sas_phy *phy) | |
546 | { | |
547 | sysfs_remove_link(&port->dev.kobj, phy->dev.bus_id); | |
548 | sysfs_remove_link(&phy->dev.kobj, "port"); | |
549 | } | |
550 | ||
551 | /** sas_port_alloc - allocate and initialize a SAS port structure | |
552 | * | |
553 | * @parent: parent device | |
554 | * @port_id: port number | |
555 | * | |
556 | * Allocates a SAS port structure. It will be added to the device tree | |
557 | * below the device specified by @parent which must be either a Scsi_Host | |
558 | * or a sas_expander_device. | |
559 | * | |
560 | * Returns %NULL on error | |
561 | */ | |
562 | struct sas_port *sas_port_alloc(struct device *parent, int port_id) | |
563 | { | |
564 | struct Scsi_Host *shost = dev_to_shost(parent); | |
565 | struct sas_port *port; | |
566 | ||
567 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
568 | if (!port) | |
569 | return NULL; | |
570 | ||
571 | port->port_identifier = port_id; | |
572 | ||
573 | device_initialize(&port->dev); | |
574 | ||
575 | port->dev.parent = get_device(parent); | |
576 | port->dev.release = sas_port_release; | |
577 | ||
578 | mutex_init(&port->phy_list_mutex); | |
579 | INIT_LIST_HEAD(&port->phy_list); | |
580 | ||
581 | if (scsi_is_sas_expander_device(parent)) { | |
582 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
583 | sprintf(port->dev.bus_id, "port-%d:%d:%d", shost->host_no, | |
584 | rphy->scsi_target_id, port->port_identifier); | |
585 | } else | |
586 | sprintf(port->dev.bus_id, "port-%d:%d", shost->host_no, | |
587 | port->port_identifier); | |
588 | ||
589 | transport_setup_device(&port->dev); | |
590 | ||
591 | return port; | |
592 | } | |
593 | EXPORT_SYMBOL(sas_port_alloc); | |
594 | ||
c9fefeb2 JB |
595 | /** sas_port_alloc_num - allocate and initialize a SAS port structure |
596 | * | |
597 | * @parent: parent device | |
598 | * | |
599 | * Allocates a SAS port structure and a number to go with it. This | |
600 | * interface is really for adapters where the port number has no | |
601 | * meansing, so the sas class should manage them. It will be added to | |
602 | * the device tree below the device specified by @parent which must be | |
603 | * either a Scsi_Host or a sas_expander_device. | |
604 | * | |
605 | * Returns %NULL on error | |
606 | */ | |
607 | struct sas_port *sas_port_alloc_num(struct device *parent) | |
608 | { | |
609 | int index; | |
610 | struct Scsi_Host *shost = dev_to_shost(parent); | |
611 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
612 | ||
613 | /* FIXME: use idr for this eventually */ | |
614 | mutex_lock(&sas_host->lock); | |
615 | if (scsi_is_sas_expander_device(parent)) { | |
616 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
617 | struct sas_expander_device *exp = rphy_to_expander_device(rphy); | |
618 | ||
619 | index = exp->next_port_id++; | |
620 | } else | |
621 | index = sas_host->next_port_id++; | |
622 | mutex_unlock(&sas_host->lock); | |
623 | return sas_port_alloc(parent, index); | |
624 | } | |
625 | EXPORT_SYMBOL(sas_port_alloc_num); | |
626 | ||
65c92b09 JB |
627 | /** |
628 | * sas_port_add - add a SAS port to the device hierarchy | |
629 | * | |
630 | * @port: port to be added | |
631 | * | |
632 | * publishes a port to the rest of the system | |
633 | */ | |
634 | int sas_port_add(struct sas_port *port) | |
635 | { | |
636 | int error; | |
637 | ||
638 | /* No phys should be added until this is made visible */ | |
639 | BUG_ON(!list_empty(&port->phy_list)); | |
640 | ||
641 | error = device_add(&port->dev); | |
642 | ||
643 | if (error) | |
644 | return error; | |
645 | ||
646 | transport_add_device(&port->dev); | |
647 | transport_configure_device(&port->dev); | |
648 | ||
649 | return 0; | |
650 | } | |
651 | EXPORT_SYMBOL(sas_port_add); | |
652 | ||
653 | /** | |
654 | * sas_port_free -- free a SAS PORT | |
655 | * @port: SAS PORT to free | |
656 | * | |
657 | * Frees the specified SAS PORT. | |
658 | * | |
659 | * Note: | |
660 | * This function must only be called on a PORT that has not | |
661 | * sucessfully been added using sas_port_add(). | |
662 | */ | |
663 | void sas_port_free(struct sas_port *port) | |
664 | { | |
665 | transport_destroy_device(&port->dev); | |
666 | put_device(&port->dev); | |
667 | } | |
668 | EXPORT_SYMBOL(sas_port_free); | |
669 | ||
670 | /** | |
671 | * sas_port_delete -- remove SAS PORT | |
672 | * @port: SAS PORT to remove | |
673 | * | |
674 | * Removes the specified SAS PORT. If the SAS PORT has an | |
675 | * associated phys, unlink them from the port as well. | |
676 | */ | |
677 | void sas_port_delete(struct sas_port *port) | |
678 | { | |
679 | struct device *dev = &port->dev; | |
680 | struct sas_phy *phy, *tmp_phy; | |
681 | ||
682 | if (port->rphy) { | |
683 | sas_rphy_delete(port->rphy); | |
684 | port->rphy = NULL; | |
685 | } | |
686 | ||
687 | mutex_lock(&port->phy_list_mutex); | |
688 | list_for_each_entry_safe(phy, tmp_phy, &port->phy_list, | |
689 | port_siblings) { | |
690 | sas_port_delete_link(port, phy); | |
691 | list_del_init(&phy->port_siblings); | |
692 | } | |
693 | mutex_unlock(&port->phy_list_mutex); | |
694 | ||
a0e1b6ef JB |
695 | if (port->is_backlink) { |
696 | struct device *parent = port->dev.parent; | |
697 | ||
698 | sysfs_remove_link(&port->dev.kobj, parent->bus_id); | |
699 | port->is_backlink = 0; | |
700 | } | |
701 | ||
65c92b09 JB |
702 | transport_remove_device(dev); |
703 | device_del(dev); | |
704 | transport_destroy_device(dev); | |
705 | put_device(dev); | |
706 | } | |
707 | EXPORT_SYMBOL(sas_port_delete); | |
708 | ||
709 | /** | |
710 | * scsi_is_sas_port -- check if a struct device represents a SAS port | |
711 | * @dev: device to check | |
712 | * | |
713 | * Returns: | |
714 | * %1 if the device represents a SAS Port, %0 else | |
715 | */ | |
716 | int scsi_is_sas_port(const struct device *dev) | |
717 | { | |
718 | return dev->release == sas_port_release; | |
719 | } | |
720 | EXPORT_SYMBOL(scsi_is_sas_port); | |
721 | ||
722 | /** | |
723 | * sas_port_add_phy - add another phy to a port to form a wide port | |
724 | * @port: port to add the phy to | |
725 | * @phy: phy to add | |
726 | * | |
727 | * When a port is initially created, it is empty (has no phys). All | |
728 | * ports must have at least one phy to operated, and all wide ports | |
729 | * must have at least two. The current code makes no difference | |
730 | * between ports and wide ports, but the only object that can be | |
731 | * connected to a remote device is a port, so ports must be formed on | |
732 | * all devices with phys if they're connected to anything. | |
733 | */ | |
734 | void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy) | |
735 | { | |
736 | mutex_lock(&port->phy_list_mutex); | |
737 | if (unlikely(!list_empty(&phy->port_siblings))) { | |
738 | /* make sure we're already on this port */ | |
739 | struct sas_phy *tmp; | |
740 | ||
741 | list_for_each_entry(tmp, &port->phy_list, port_siblings) | |
742 | if (tmp == phy) | |
743 | break; | |
744 | /* If this trips, you added a phy that was already | |
745 | * part of a different port */ | |
746 | if (unlikely(tmp != phy)) { | |
747 | dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", phy->dev.bus_id); | |
748 | BUG(); | |
749 | } | |
750 | } else { | |
751 | sas_port_create_link(port, phy); | |
752 | list_add_tail(&phy->port_siblings, &port->phy_list); | |
753 | port->num_phys++; | |
754 | } | |
755 | mutex_unlock(&port->phy_list_mutex); | |
756 | } | |
757 | EXPORT_SYMBOL(sas_port_add_phy); | |
758 | ||
759 | /** | |
760 | * sas_port_delete_phy - remove a phy from a port or wide port | |
761 | * @port: port to remove the phy from | |
762 | * @phy: phy to remove | |
763 | * | |
764 | * This operation is used for tearing down ports again. It must be | |
765 | * done to every port or wide port before calling sas_port_delete. | |
766 | */ | |
767 | void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy) | |
768 | { | |
769 | mutex_lock(&port->phy_list_mutex); | |
770 | sas_port_delete_link(port, phy); | |
771 | list_del_init(&phy->port_siblings); | |
772 | port->num_phys--; | |
773 | mutex_unlock(&port->phy_list_mutex); | |
774 | } | |
775 | EXPORT_SYMBOL(sas_port_delete_phy); | |
776 | ||
a0e1b6ef JB |
777 | void sas_port_mark_backlink(struct sas_port *port) |
778 | { | |
779 | struct device *parent = port->dev.parent->parent->parent; | |
780 | ||
781 | if (port->is_backlink) | |
782 | return; | |
783 | port->is_backlink = 1; | |
784 | sysfs_create_link(&port->dev.kobj, &parent->kobj, | |
785 | parent->bus_id); | |
786 | ||
787 | } | |
788 | EXPORT_SYMBOL(sas_port_mark_backlink); | |
789 | ||
c7ebbbce CH |
790 | /* |
791 | * SAS remote PHY attributes. | |
792 | */ | |
793 | ||
794 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
795 | static ssize_t \ | |
796 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
797 | { \ | |
798 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
799 | \ | |
800 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
801 | } | |
802 | ||
803 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
804 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
805 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
806 | show_sas_rphy_##name, NULL) | |
807 | ||
808 | #define sas_rphy_show_protocol(field, name) \ | |
809 | static ssize_t \ | |
810 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
811 | { \ | |
812 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
813 | \ | |
814 | if (!rphy->field) \ | |
815 | return snprintf(buf, 20, "none\n"); \ | |
816 | return get_sas_protocol_names(rphy->field, buf); \ | |
817 | } | |
818 | ||
819 | #define sas_rphy_protocol_attr(field, name) \ | |
820 | sas_rphy_show_protocol(field, name) \ | |
821 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
822 | show_sas_rphy_##name, NULL) | |
823 | ||
824 | static ssize_t | |
825 | show_sas_rphy_device_type(struct class_device *cdev, char *buf) | |
826 | { | |
827 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
828 | ||
829 | if (!rphy->identify.device_type) | |
830 | return snprintf(buf, 20, "none\n"); | |
831 | return get_sas_device_type_names( | |
832 | rphy->identify.device_type, buf); | |
833 | } | |
834 | ||
835 | static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO, | |
836 | show_sas_rphy_device_type, NULL); | |
837 | ||
a0125641 CH |
838 | static ssize_t |
839 | show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf) | |
840 | { | |
841 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
842 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); | |
843 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
844 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
845 | u64 identifier; | |
846 | int error; | |
847 | ||
848 | /* | |
849 | * Only devices behind an expander are supported, because the | |
850 | * enclosure identifier is a SMP feature. | |
851 | */ | |
852 | if (phy->local_attached) | |
853 | return -EINVAL; | |
854 | ||
855 | error = i->f->get_enclosure_identifier(rphy, &identifier); | |
856 | if (error) | |
857 | return error; | |
858 | return sprintf(buf, "0x%llx\n", (unsigned long long)identifier); | |
859 | } | |
860 | ||
861 | static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO, | |
862 | show_sas_rphy_enclosure_identifier, NULL); | |
863 | ||
864 | static ssize_t | |
865 | show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf) | |
866 | { | |
867 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
868 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); | |
869 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
870 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
871 | int val; | |
872 | ||
873 | if (phy->local_attached) | |
874 | return -EINVAL; | |
875 | ||
876 | val = i->f->get_bay_identifier(rphy); | |
877 | if (val < 0) | |
878 | return val; | |
879 | return sprintf(buf, "%d\n", val); | |
880 | } | |
881 | ||
882 | static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO, | |
883 | show_sas_rphy_bay_identifier, NULL); | |
884 | ||
c7ebbbce CH |
885 | sas_rphy_protocol_attr(identify.initiator_port_protocols, |
886 | initiator_port_protocols); | |
887 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
888 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
889 | unsigned long long); | |
890 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
891 | ||
42ab0360 JB |
892 | /* only need 8 bytes of data plus header (4 or 8) */ |
893 | #define BUF_SIZE 64 | |
894 | ||
895 | int sas_read_port_mode_page(struct scsi_device *sdev) | |
896 | { | |
897 | char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata; | |
898 | struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target); | |
899 | struct sas_end_device *rdev; | |
900 | struct scsi_mode_data mode_data; | |
901 | int res, error; | |
902 | ||
903 | BUG_ON(rphy->identify.device_type != SAS_END_DEVICE); | |
904 | ||
905 | rdev = rphy_to_end_device(rphy); | |
906 | ||
907 | if (!buffer) | |
908 | return -ENOMEM; | |
909 | ||
910 | res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3, | |
911 | &mode_data, NULL); | |
912 | ||
913 | error = -EINVAL; | |
914 | if (!scsi_status_is_good(res)) | |
915 | goto out; | |
916 | ||
917 | msdata = buffer + mode_data.header_length + | |
918 | mode_data.block_descriptor_length; | |
919 | ||
920 | if (msdata - buffer > BUF_SIZE - 8) | |
921 | goto out; | |
922 | ||
923 | error = 0; | |
924 | ||
925 | rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0; | |
926 | rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5]; | |
927 | rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7]; | |
928 | ||
929 | out: | |
930 | kfree(buffer); | |
931 | return error; | |
932 | } | |
933 | EXPORT_SYMBOL(sas_read_port_mode_page); | |
934 | ||
79cb1819 JB |
935 | static DECLARE_TRANSPORT_CLASS(sas_end_dev_class, |
936 | "sas_end_device", NULL, NULL, NULL); | |
937 | ||
42ab0360 JB |
938 | #define sas_end_dev_show_simple(field, name, format_string, cast) \ |
939 | static ssize_t \ | |
940 | show_sas_end_dev_##name(struct class_device *cdev, char *buf) \ | |
941 | { \ | |
942 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
943 | struct sas_end_device *rdev = rphy_to_end_device(rphy); \ | |
944 | \ | |
945 | return snprintf(buf, 20, format_string, cast rdev->field); \ | |
946 | } | |
947 | ||
948 | #define sas_end_dev_simple_attr(field, name, format_string, type) \ | |
949 | sas_end_dev_show_simple(field, name, format_string, (type)) \ | |
950 | static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \ | |
951 | show_sas_end_dev_##name, NULL) | |
952 | ||
953 | sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int); | |
954 | sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout, | |
955 | "%d\n", int); | |
956 | sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout, | |
957 | "%d\n", int); | |
958 | ||
79cb1819 JB |
959 | static DECLARE_TRANSPORT_CLASS(sas_expander_class, |
960 | "sas_expander", NULL, NULL, NULL); | |
961 | ||
962 | #define sas_expander_show_simple(field, name, format_string, cast) \ | |
963 | static ssize_t \ | |
964 | show_sas_expander_##name(struct class_device *cdev, char *buf) \ | |
965 | { \ | |
966 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
967 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); \ | |
968 | \ | |
969 | return snprintf(buf, 20, format_string, cast edev->field); \ | |
970 | } | |
971 | ||
972 | #define sas_expander_simple_attr(field, name, format_string, type) \ | |
973 | sas_expander_show_simple(field, name, format_string, (type)) \ | |
974 | static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO, \ | |
975 | show_sas_expander_##name, NULL) | |
976 | ||
977 | sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *); | |
978 | sas_expander_simple_attr(product_id, product_id, "%s\n", char *); | |
979 | sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *); | |
980 | sas_expander_simple_attr(component_vendor_id, component_vendor_id, | |
981 | "%s\n", char *); | |
982 | sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int); | |
983 | sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n", | |
984 | unsigned int); | |
985 | sas_expander_simple_attr(level, level, "%d\n", int); | |
42ab0360 | 986 | |
c7ebbbce | 987 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, |
2f8600df | 988 | "sas_device", NULL, NULL, NULL); |
c7ebbbce CH |
989 | |
990 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
991 | { | |
992 | struct Scsi_Host *shost; | |
993 | struct sas_internal *i; | |
994 | ||
995 | if (!scsi_is_sas_rphy(dev)) | |
996 | return 0; | |
997 | shost = dev_to_shost(dev->parent->parent); | |
998 | ||
999 | if (!shost->transportt) | |
1000 | return 0; | |
1001 | if (shost->transportt->host_attrs.ac.class != | |
1002 | &sas_host_class.class) | |
1003 | return 0; | |
1004 | ||
1005 | i = to_sas_internal(shost->transportt); | |
1006 | return &i->rphy_attr_cont.ac == cont; | |
1007 | } | |
1008 | ||
42ab0360 JB |
1009 | static int sas_end_dev_match(struct attribute_container *cont, |
1010 | struct device *dev) | |
1011 | { | |
1012 | struct Scsi_Host *shost; | |
1013 | struct sas_internal *i; | |
1014 | struct sas_rphy *rphy; | |
1015 | ||
1016 | if (!scsi_is_sas_rphy(dev)) | |
1017 | return 0; | |
1018 | shost = dev_to_shost(dev->parent->parent); | |
1019 | rphy = dev_to_rphy(dev); | |
1020 | ||
1021 | if (!shost->transportt) | |
1022 | return 0; | |
1023 | if (shost->transportt->host_attrs.ac.class != | |
1024 | &sas_host_class.class) | |
1025 | return 0; | |
1026 | ||
1027 | i = to_sas_internal(shost->transportt); | |
1028 | return &i->end_dev_attr_cont.ac == cont && | |
2f8600df | 1029 | rphy->identify.device_type == SAS_END_DEVICE; |
42ab0360 JB |
1030 | } |
1031 | ||
79cb1819 JB |
1032 | static int sas_expander_match(struct attribute_container *cont, |
1033 | struct device *dev) | |
1034 | { | |
1035 | struct Scsi_Host *shost; | |
1036 | struct sas_internal *i; | |
1037 | struct sas_rphy *rphy; | |
1038 | ||
1039 | if (!scsi_is_sas_rphy(dev)) | |
1040 | return 0; | |
1041 | shost = dev_to_shost(dev->parent->parent); | |
1042 | rphy = dev_to_rphy(dev); | |
1043 | ||
1044 | if (!shost->transportt) | |
1045 | return 0; | |
1046 | if (shost->transportt->host_attrs.ac.class != | |
1047 | &sas_host_class.class) | |
1048 | return 0; | |
1049 | ||
1050 | i = to_sas_internal(shost->transportt); | |
1051 | return &i->expander_attr_cont.ac == cont && | |
1052 | (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE || | |
2f8600df | 1053 | rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE); |
79cb1819 JB |
1054 | } |
1055 | ||
2f8600df | 1056 | static void sas_expander_release(struct device *dev) |
c7ebbbce CH |
1057 | { |
1058 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
2f8600df | 1059 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
c7ebbbce CH |
1060 | |
1061 | put_device(dev->parent); | |
2f8600df | 1062 | kfree(edev); |
c7ebbbce CH |
1063 | } |
1064 | ||
2f8600df | 1065 | static void sas_end_device_release(struct device *dev) |
c7ebbbce | 1066 | { |
2f8600df JB |
1067 | struct sas_rphy *rphy = dev_to_rphy(dev); |
1068 | struct sas_end_device *edev = rphy_to_end_device(rphy); | |
c7ebbbce | 1069 | |
2f8600df JB |
1070 | put_device(dev->parent); |
1071 | kfree(edev); | |
c7ebbbce | 1072 | } |
c7ebbbce | 1073 | |
c5943d36 JB |
1074 | /** |
1075 | * sas_rphy_initialize - common rphy intialization | |
1076 | * @rphy: rphy to initialise | |
1077 | * | |
1078 | * Used by both sas_end_device_alloc() and sas_expander_alloc() to | |
1079 | * initialise the common rphy component of each. | |
1080 | */ | |
1081 | static void sas_rphy_initialize(struct sas_rphy *rphy) | |
1082 | { | |
1083 | INIT_LIST_HEAD(&rphy->list); | |
1084 | } | |
1085 | ||
42ab0360 JB |
1086 | /** |
1087 | * sas_end_device_alloc - allocate an rphy for an end device | |
1088 | * | |
1089 | * Allocates an SAS remote PHY structure, connected to @parent. | |
1090 | * | |
1091 | * Returns: | |
1092 | * SAS PHY allocated or %NULL if the allocation failed. | |
1093 | */ | |
65c92b09 | 1094 | struct sas_rphy *sas_end_device_alloc(struct sas_port *parent) |
42ab0360 JB |
1095 | { |
1096 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
1097 | struct sas_end_device *rdev; | |
1098 | ||
1099 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); | |
1100 | if (!rdev) { | |
42ab0360 JB |
1101 | return NULL; |
1102 | } | |
1103 | ||
1104 | device_initialize(&rdev->rphy.dev); | |
1105 | rdev->rphy.dev.parent = get_device(&parent->dev); | |
2f8600df | 1106 | rdev->rphy.dev.release = sas_end_device_release; |
65c92b09 JB |
1107 | if (scsi_is_sas_expander_device(parent->dev.parent)) { |
1108 | struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent); | |
1109 | sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d:%d", | |
1110 | shost->host_no, rphy->scsi_target_id, parent->port_identifier); | |
1111 | } else | |
1112 | sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d", | |
1113 | shost->host_no, parent->port_identifier); | |
42ab0360 | 1114 | rdev->rphy.identify.device_type = SAS_END_DEVICE; |
c5943d36 | 1115 | sas_rphy_initialize(&rdev->rphy); |
42ab0360 JB |
1116 | transport_setup_device(&rdev->rphy.dev); |
1117 | ||
1118 | return &rdev->rphy; | |
1119 | } | |
1120 | EXPORT_SYMBOL(sas_end_device_alloc); | |
1121 | ||
79cb1819 JB |
1122 | /** |
1123 | * sas_expander_alloc - allocate an rphy for an end device | |
1124 | * | |
1125 | * Allocates an SAS remote PHY structure, connected to @parent. | |
1126 | * | |
1127 | * Returns: | |
1128 | * SAS PHY allocated or %NULL if the allocation failed. | |
1129 | */ | |
65c92b09 | 1130 | struct sas_rphy *sas_expander_alloc(struct sas_port *parent, |
79cb1819 JB |
1131 | enum sas_device_type type) |
1132 | { | |
1133 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
1134 | struct sas_expander_device *rdev; | |
1135 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1136 | ||
1137 | BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE && | |
1138 | type != SAS_FANOUT_EXPANDER_DEVICE); | |
1139 | ||
1140 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); | |
1141 | if (!rdev) { | |
79cb1819 JB |
1142 | return NULL; |
1143 | } | |
1144 | ||
1145 | device_initialize(&rdev->rphy.dev); | |
1146 | rdev->rphy.dev.parent = get_device(&parent->dev); | |
2f8600df | 1147 | rdev->rphy.dev.release = sas_expander_release; |
79cb1819 JB |
1148 | mutex_lock(&sas_host->lock); |
1149 | rdev->rphy.scsi_target_id = sas_host->next_expander_id++; | |
1150 | mutex_unlock(&sas_host->lock); | |
1151 | sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d", | |
1152 | shost->host_no, rdev->rphy.scsi_target_id); | |
1153 | rdev->rphy.identify.device_type = type; | |
c5943d36 | 1154 | sas_rphy_initialize(&rdev->rphy); |
79cb1819 JB |
1155 | transport_setup_device(&rdev->rphy.dev); |
1156 | ||
1157 | return &rdev->rphy; | |
1158 | } | |
1159 | EXPORT_SYMBOL(sas_expander_alloc); | |
42ab0360 | 1160 | |
c7ebbbce CH |
1161 | /** |
1162 | * sas_rphy_add -- add a SAS remote PHY to the device hierachy | |
1163 | * @rphy: The remote PHY to be added | |
1164 | * | |
1165 | * Publishes a SAS remote PHY to the rest of the system. | |
1166 | */ | |
1167 | int sas_rphy_add(struct sas_rphy *rphy) | |
1168 | { | |
65c92b09 | 1169 | struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); |
c7ebbbce CH |
1170 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); |
1171 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1172 | struct sas_identify *identify = &rphy->identify; | |
1173 | int error; | |
1174 | ||
1175 | if (parent->rphy) | |
1176 | return -ENXIO; | |
1177 | parent->rphy = rphy; | |
1178 | ||
1179 | error = device_add(&rphy->dev); | |
1180 | if (error) | |
1181 | return error; | |
1182 | transport_add_device(&rphy->dev); | |
1183 | transport_configure_device(&rphy->dev); | |
1184 | ||
e02f3f59 | 1185 | mutex_lock(&sas_host->lock); |
c7ebbbce CH |
1186 | list_add_tail(&rphy->list, &sas_host->rphy_list); |
1187 | if (identify->device_type == SAS_END_DEVICE && | |
1188 | (identify->target_port_protocols & | |
1189 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
1190 | rphy->scsi_target_id = sas_host->next_target_id++; | |
7676f83a JB |
1191 | else if (identify->device_type == SAS_END_DEVICE) |
1192 | rphy->scsi_target_id = -1; | |
e02f3f59 | 1193 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1194 | |
79cb1819 JB |
1195 | if (identify->device_type == SAS_END_DEVICE && |
1196 | rphy->scsi_target_id != -1) { | |
e8bf3941 | 1197 | scsi_scan_target(&rphy->dev, 0, |
c7ebbbce CH |
1198 | rphy->scsi_target_id, ~0, 0); |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | EXPORT_SYMBOL(sas_rphy_add); | |
1204 | ||
1205 | /** | |
1206 | * sas_rphy_free -- free a SAS remote PHY | |
1207 | * @rphy SAS remote PHY to free | |
1208 | * | |
1209 | * Frees the specified SAS remote PHY. | |
1210 | * | |
1211 | * Note: | |
1212 | * This function must only be called on a remote | |
1213 | * PHY that has not sucessfully been added using | |
1214 | * sas_rphy_add(). | |
1215 | */ | |
1216 | void sas_rphy_free(struct sas_rphy *rphy) | |
1217 | { | |
92aab646 | 1218 | struct device *dev = &rphy->dev; |
c7ebbbce CH |
1219 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); |
1220 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1221 | ||
e02f3f59 | 1222 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1223 | list_del(&rphy->list); |
e02f3f59 | 1224 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1225 | |
92aab646 | 1226 | transport_destroy_device(dev); |
2f8600df | 1227 | |
92aab646 | 1228 | put_device(dev); |
c7ebbbce CH |
1229 | } |
1230 | EXPORT_SYMBOL(sas_rphy_free); | |
1231 | ||
1232 | /** | |
1233 | * sas_rphy_delete -- remove SAS remote PHY | |
1234 | * @rphy: SAS remote PHY to remove | |
1235 | * | |
1236 | * Removes the specified SAS remote PHY. | |
1237 | */ | |
1238 | void | |
1239 | sas_rphy_delete(struct sas_rphy *rphy) | |
1240 | { | |
1241 | struct device *dev = &rphy->dev; | |
65c92b09 | 1242 | struct sas_port *parent = dev_to_sas_port(dev->parent); |
c7ebbbce CH |
1243 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); |
1244 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1245 | ||
d4054239 CH |
1246 | switch (rphy->identify.device_type) { |
1247 | case SAS_END_DEVICE: | |
1248 | scsi_remove_target(dev); | |
1249 | break; | |
1250 | case SAS_EDGE_EXPANDER_DEVICE: | |
1251 | case SAS_FANOUT_EXPANDER_DEVICE: | |
65c92b09 | 1252 | sas_remove_children(dev); |
d4054239 CH |
1253 | break; |
1254 | default: | |
1255 | break; | |
1256 | } | |
c7ebbbce | 1257 | |
fe8b2304 CH |
1258 | transport_remove_device(dev); |
1259 | device_del(dev); | |
1260 | transport_destroy_device(dev); | |
c7ebbbce | 1261 | |
e02f3f59 | 1262 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1263 | list_del(&rphy->list); |
e02f3f59 | 1264 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1265 | |
33b114e9 CH |
1266 | parent->rphy = NULL; |
1267 | ||
92aab646 | 1268 | put_device(dev); |
c7ebbbce CH |
1269 | } |
1270 | EXPORT_SYMBOL(sas_rphy_delete); | |
1271 | ||
1272 | /** | |
1273 | * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY | |
1274 | * @dev: device to check | |
1275 | * | |
1276 | * Returns: | |
1277 | * %1 if the device represents a SAS remote PHY, %0 else | |
1278 | */ | |
1279 | int scsi_is_sas_rphy(const struct device *dev) | |
1280 | { | |
2f8600df JB |
1281 | return dev->release == sas_end_device_release || |
1282 | dev->release == sas_expander_release; | |
c7ebbbce CH |
1283 | } |
1284 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
1285 | ||
1286 | ||
1287 | /* | |
1288 | * SCSI scan helper | |
1289 | */ | |
1290 | ||
e02f3f59 CH |
1291 | static int sas_user_scan(struct Scsi_Host *shost, uint channel, |
1292 | uint id, uint lun) | |
c7ebbbce CH |
1293 | { |
1294 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1295 | struct sas_rphy *rphy; | |
c7ebbbce | 1296 | |
e02f3f59 | 1297 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1298 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { |
6d99a3f3 JB |
1299 | if (rphy->identify.device_type != SAS_END_DEVICE || |
1300 | rphy->scsi_target_id == -1) | |
e02f3f59 CH |
1301 | continue; |
1302 | ||
e8bf3941 | 1303 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
e02f3f59 | 1304 | (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { |
e8bf3941 | 1305 | scsi_scan_target(&rphy->dev, 0, |
e02f3f59 CH |
1306 | rphy->scsi_target_id, lun, 1); |
1307 | } | |
c7ebbbce | 1308 | } |
e02f3f59 | 1309 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1310 | |
e02f3f59 | 1311 | return 0; |
c7ebbbce CH |
1312 | } |
1313 | ||
1314 | ||
1315 | /* | |
1316 | * Setup / Teardown code | |
1317 | */ | |
1318 | ||
42ab0360 JB |
1319 | #define SETUP_TEMPLATE(attrb, field, perm, test) \ |
1320 | i->private_##attrb[count] = class_device_attr_##field; \ | |
1321 | i->private_##attrb[count].attr.mode = perm; \ | |
42ab0360 JB |
1322 | i->attrb[count] = &i->private_##attrb[count]; \ |
1323 | if (test) \ | |
1324 | count++ | |
1325 | ||
1326 | ||
1327 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
1328 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1) | |
c7ebbbce | 1329 | |
dd9fbb52 | 1330 | #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \ |
42ab0360 | 1331 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func) |
dd9fbb52 | 1332 | |
65c92b09 | 1333 | #define SETUP_PHY_ATTRIBUTE(field) \ |
42ab0360 | 1334 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) |
c7ebbbce | 1335 | |
65c92b09 JB |
1336 | #define SETUP_PORT_ATTRIBUTE(field) \ |
1337 | SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) | |
1338 | ||
1339 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \ | |
42ab0360 | 1340 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) |
dd9fbb52 | 1341 | |
65c92b09 | 1342 | #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \ |
42ab0360 | 1343 | SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1) |
07ba3a95 | 1344 | |
65c92b09 | 1345 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \ |
42ab0360 | 1346 | SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func) |
dd9fbb52 | 1347 | |
42ab0360 JB |
1348 | #define SETUP_END_DEV_ATTRIBUTE(field) \ |
1349 | SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1) | |
c7ebbbce | 1350 | |
79cb1819 JB |
1351 | #define SETUP_EXPANDER_ATTRIBUTE(field) \ |
1352 | SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1) | |
1353 | ||
c7ebbbce CH |
1354 | /** |
1355 | * sas_attach_transport -- instantiate SAS transport template | |
1356 | * @ft: SAS transport class function template | |
1357 | */ | |
1358 | struct scsi_transport_template * | |
1359 | sas_attach_transport(struct sas_function_template *ft) | |
1360 | { | |
1361 | struct sas_internal *i; | |
1362 | int count; | |
1363 | ||
24669f75 | 1364 | i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL); |
c7ebbbce CH |
1365 | if (!i) |
1366 | return NULL; | |
c7ebbbce | 1367 | |
e02f3f59 | 1368 | i->t.user_scan = sas_user_scan; |
c7ebbbce CH |
1369 | |
1370 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1371 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
1372 | i->t.host_attrs.ac.match = sas_host_match; | |
1373 | transport_container_register(&i->t.host_attrs); | |
1374 | i->t.host_size = sizeof(struct sas_host_attrs); | |
1375 | ||
1376 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
1377 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
1378 | i->phy_attr_cont.ac.match = sas_phy_match; | |
1379 | transport_container_register(&i->phy_attr_cont); | |
1380 | ||
65c92b09 JB |
1381 | i->port_attr_cont.ac.class = &sas_port_class.class; |
1382 | i->port_attr_cont.ac.attrs = &i->port_attrs[0]; | |
1383 | i->port_attr_cont.ac.match = sas_port_match; | |
1384 | transport_container_register(&i->port_attr_cont); | |
1385 | ||
c7ebbbce CH |
1386 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; |
1387 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
1388 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
1389 | transport_container_register(&i->rphy_attr_cont); | |
1390 | ||
42ab0360 JB |
1391 | i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class; |
1392 | i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0]; | |
1393 | i->end_dev_attr_cont.ac.match = sas_end_dev_match; | |
1394 | transport_container_register(&i->end_dev_attr_cont); | |
1395 | ||
79cb1819 JB |
1396 | i->expander_attr_cont.ac.class = &sas_expander_class.class; |
1397 | i->expander_attr_cont.ac.attrs = &i->expander_attrs[0]; | |
1398 | i->expander_attr_cont.ac.match = sas_expander_match; | |
1399 | transport_container_register(&i->expander_attr_cont); | |
1400 | ||
c7ebbbce CH |
1401 | i->f = ft; |
1402 | ||
1403 | count = 0; | |
65c92b09 | 1404 | SETUP_PORT_ATTRIBUTE(num_phys); |
c7ebbbce CH |
1405 | i->host_attrs[count] = NULL; |
1406 | ||
1407 | count = 0; | |
65c92b09 JB |
1408 | SETUP_PHY_ATTRIBUTE(initiator_port_protocols); |
1409 | SETUP_PHY_ATTRIBUTE(target_port_protocols); | |
1410 | SETUP_PHY_ATTRIBUTE(device_type); | |
1411 | SETUP_PHY_ATTRIBUTE(sas_address); | |
1412 | SETUP_PHY_ATTRIBUTE(phy_identifier); | |
1413 | //SETUP_PHY_ATTRIBUTE(port_identifier); | |
1414 | SETUP_PHY_ATTRIBUTE(negotiated_linkrate); | |
1415 | SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw); | |
1416 | SETUP_PHY_ATTRIBUTE(minimum_linkrate); | |
1417 | SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw); | |
1418 | SETUP_PHY_ATTRIBUTE(maximum_linkrate); | |
1419 | ||
1420 | SETUP_PHY_ATTRIBUTE(invalid_dword_count); | |
1421 | SETUP_PHY_ATTRIBUTE(running_disparity_error_count); | |
1422 | SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count); | |
1423 | SETUP_PHY_ATTRIBUTE(phy_reset_problem_count); | |
1424 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset); | |
1425 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset); | |
c7ebbbce CH |
1426 | i->phy_attrs[count] = NULL; |
1427 | ||
65c92b09 JB |
1428 | count = 0; |
1429 | SETUP_PORT_ATTRIBUTE(num_phys); | |
1430 | i->port_attrs[count] = NULL; | |
1431 | ||
c7ebbbce CH |
1432 | count = 0; |
1433 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
1434 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
1435 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
1436 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
1437 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
dd9fbb52 JB |
1438 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier, |
1439 | get_enclosure_identifier); | |
1440 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier, | |
1441 | get_bay_identifier); | |
c7ebbbce CH |
1442 | i->rphy_attrs[count] = NULL; |
1443 | ||
42ab0360 JB |
1444 | count = 0; |
1445 | SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning); | |
1446 | SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout); | |
1447 | SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout); | |
1448 | i->end_dev_attrs[count] = NULL; | |
1449 | ||
79cb1819 JB |
1450 | count = 0; |
1451 | SETUP_EXPANDER_ATTRIBUTE(vendor_id); | |
1452 | SETUP_EXPANDER_ATTRIBUTE(product_id); | |
1453 | SETUP_EXPANDER_ATTRIBUTE(product_rev); | |
1454 | SETUP_EXPANDER_ATTRIBUTE(component_vendor_id); | |
1455 | SETUP_EXPANDER_ATTRIBUTE(component_id); | |
1456 | SETUP_EXPANDER_ATTRIBUTE(component_revision_id); | |
1457 | SETUP_EXPANDER_ATTRIBUTE(level); | |
1458 | i->expander_attrs[count] = NULL; | |
1459 | ||
c7ebbbce CH |
1460 | return &i->t; |
1461 | } | |
1462 | EXPORT_SYMBOL(sas_attach_transport); | |
1463 | ||
1464 | /** | |
1465 | * sas_release_transport -- release SAS transport template instance | |
1466 | * @t: transport template instance | |
1467 | */ | |
1468 | void sas_release_transport(struct scsi_transport_template *t) | |
1469 | { | |
1470 | struct sas_internal *i = to_sas_internal(t); | |
1471 | ||
1472 | transport_container_unregister(&i->t.host_attrs); | |
1473 | transport_container_unregister(&i->phy_attr_cont); | |
65c92b09 | 1474 | transport_container_unregister(&i->port_attr_cont); |
c7ebbbce | 1475 | transport_container_unregister(&i->rphy_attr_cont); |
db82f841 | 1476 | transport_container_unregister(&i->end_dev_attr_cont); |
79cb1819 | 1477 | transport_container_unregister(&i->expander_attr_cont); |
c7ebbbce CH |
1478 | |
1479 | kfree(i); | |
1480 | } | |
1481 | EXPORT_SYMBOL(sas_release_transport); | |
1482 | ||
1483 | static __init int sas_transport_init(void) | |
1484 | { | |
1485 | int error; | |
1486 | ||
1487 | error = transport_class_register(&sas_host_class); | |
1488 | if (error) | |
1489 | goto out; | |
1490 | error = transport_class_register(&sas_phy_class); | |
1491 | if (error) | |
1492 | goto out_unregister_transport; | |
65c92b09 | 1493 | error = transport_class_register(&sas_port_class); |
c7ebbbce CH |
1494 | if (error) |
1495 | goto out_unregister_phy; | |
65c92b09 JB |
1496 | error = transport_class_register(&sas_rphy_class); |
1497 | if (error) | |
1498 | goto out_unregister_port; | |
42ab0360 JB |
1499 | error = transport_class_register(&sas_end_dev_class); |
1500 | if (error) | |
1501 | goto out_unregister_rphy; | |
79cb1819 JB |
1502 | error = transport_class_register(&sas_expander_class); |
1503 | if (error) | |
1504 | goto out_unregister_end_dev; | |
c7ebbbce CH |
1505 | |
1506 | return 0; | |
1507 | ||
79cb1819 JB |
1508 | out_unregister_end_dev: |
1509 | transport_class_unregister(&sas_end_dev_class); | |
42ab0360 JB |
1510 | out_unregister_rphy: |
1511 | transport_class_unregister(&sas_rphy_class); | |
65c92b09 JB |
1512 | out_unregister_port: |
1513 | transport_class_unregister(&sas_port_class); | |
c7ebbbce CH |
1514 | out_unregister_phy: |
1515 | transport_class_unregister(&sas_phy_class); | |
1516 | out_unregister_transport: | |
1517 | transport_class_unregister(&sas_host_class); | |
1518 | out: | |
1519 | return error; | |
1520 | ||
1521 | } | |
1522 | ||
1523 | static void __exit sas_transport_exit(void) | |
1524 | { | |
1525 | transport_class_unregister(&sas_host_class); | |
1526 | transport_class_unregister(&sas_phy_class); | |
65c92b09 | 1527 | transport_class_unregister(&sas_port_class); |
c7ebbbce | 1528 | transport_class_unregister(&sas_rphy_class); |
42ab0360 | 1529 | transport_class_unregister(&sas_end_dev_class); |
79cb1819 | 1530 | transport_class_unregister(&sas_expander_class); |
c7ebbbce CH |
1531 | } |
1532 | ||
1533 | MODULE_AUTHOR("Christoph Hellwig"); | |
1534 | MODULE_DESCRIPTION("SAS Transphy Attributes"); | |
1535 | MODULE_LICENSE("GPL"); | |
1536 | ||
1537 | module_init(sas_transport_init); | |
1538 | module_exit(sas_transport_exit); |