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; |
c7ebbbce CH |
44 | }; |
45 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) | |
46 | ||
47 | ||
48 | /* | |
49 | * Hack to allow attributes of the same name in different objects. | |
50 | */ | |
51 | #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
52 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
53 | __ATTR(_name,_mode,_show,_store) | |
54 | ||
55 | ||
56 | /* | |
57 | * Pretty printing helpers | |
58 | */ | |
59 | ||
60 | #define sas_bitfield_name_match(title, table) \ | |
61 | static ssize_t \ | |
62 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
63 | { \ | |
64 | char *prefix = ""; \ | |
65 | ssize_t len = 0; \ | |
66 | int i; \ | |
67 | \ | |
6391a113 | 68 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
c7ebbbce CH |
69 | if (table[i].value & table_key) { \ |
70 | len += sprintf(buf + len, "%s%s", \ | |
71 | prefix, table[i].name); \ | |
72 | prefix = ", "; \ | |
73 | } \ | |
74 | } \ | |
75 | len += sprintf(buf + len, "\n"); \ | |
76 | return len; \ | |
77 | } | |
78 | ||
79 | #define sas_bitfield_name_search(title, table) \ | |
80 | static ssize_t \ | |
81 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
82 | { \ | |
83 | ssize_t len = 0; \ | |
84 | int i; \ | |
85 | \ | |
6391a113 | 86 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
c7ebbbce CH |
87 | if (table[i].value == table_key) { \ |
88 | len += sprintf(buf + len, "%s", \ | |
89 | table[i].name); \ | |
90 | break; \ | |
91 | } \ | |
92 | } \ | |
93 | len += sprintf(buf + len, "\n"); \ | |
94 | return len; \ | |
95 | } | |
96 | ||
97 | static struct { | |
98 | u32 value; | |
99 | char *name; | |
100 | } sas_device_type_names[] = { | |
101 | { SAS_PHY_UNUSED, "unused" }, | |
102 | { SAS_END_DEVICE, "end device" }, | |
103 | { SAS_EDGE_EXPANDER_DEVICE, "edge expander" }, | |
104 | { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" }, | |
105 | }; | |
106 | sas_bitfield_name_search(device_type, sas_device_type_names) | |
107 | ||
108 | ||
109 | static struct { | |
110 | u32 value; | |
111 | char *name; | |
112 | } sas_protocol_names[] = { | |
113 | { SAS_PROTOCOL_SATA, "sata" }, | |
114 | { SAS_PROTOCOL_SMP, "smp" }, | |
115 | { SAS_PROTOCOL_STP, "stp" }, | |
116 | { SAS_PROTOCOL_SSP, "ssp" }, | |
117 | }; | |
118 | sas_bitfield_name_match(protocol, sas_protocol_names) | |
119 | ||
120 | static struct { | |
121 | u32 value; | |
122 | char *name; | |
123 | } sas_linkspeed_names[] = { | |
124 | { SAS_LINK_RATE_UNKNOWN, "Unknown" }, | |
125 | { SAS_PHY_DISABLED, "Phy disabled" }, | |
126 | { SAS_LINK_RATE_FAILED, "Link Rate failed" }, | |
127 | { SAS_SATA_SPINUP_HOLD, "Spin-up hold" }, | |
128 | { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" }, | |
129 | { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" }, | |
7e6dff62 | 130 | { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" }, |
c7ebbbce CH |
131 | }; |
132 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) | |
133 | ||
134 | ||
135 | /* | |
136 | * SAS host attributes | |
137 | */ | |
138 | ||
37be6eeb JB |
139 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
140 | struct class_device *cdev) | |
c7ebbbce CH |
141 | { |
142 | struct Scsi_Host *shost = dev_to_shost(dev); | |
143 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
144 | ||
145 | INIT_LIST_HEAD(&sas_host->rphy_list); | |
e02f3f59 | 146 | mutex_init(&sas_host->lock); |
c7ebbbce | 147 | sas_host->next_target_id = 0; |
79cb1819 | 148 | sas_host->next_expander_id = 0; |
c7ebbbce CH |
149 | return 0; |
150 | } | |
151 | ||
152 | static DECLARE_TRANSPORT_CLASS(sas_host_class, | |
153 | "sas_host", sas_host_setup, NULL, NULL); | |
154 | ||
155 | static int sas_host_match(struct attribute_container *cont, | |
156 | struct device *dev) | |
157 | { | |
158 | struct Scsi_Host *shost; | |
159 | struct sas_internal *i; | |
160 | ||
161 | if (!scsi_is_host_device(dev)) | |
162 | return 0; | |
163 | shost = dev_to_shost(dev); | |
164 | ||
165 | if (!shost->transportt) | |
166 | return 0; | |
167 | if (shost->transportt->host_attrs.ac.class != | |
168 | &sas_host_class.class) | |
169 | return 0; | |
170 | ||
171 | i = to_sas_internal(shost->transportt); | |
172 | return &i->t.host_attrs.ac == cont; | |
173 | } | |
174 | ||
175 | static int do_sas_phy_delete(struct device *dev, void *data) | |
176 | { | |
65c92b09 JB |
177 | int pass = (int)(unsigned long)data; |
178 | ||
179 | if (pass == 0 && scsi_is_sas_port(dev)) | |
180 | sas_port_delete(dev_to_sas_port(dev)); | |
181 | else if (pass == 1 && scsi_is_sas_phy(dev)) | |
c7ebbbce CH |
182 | sas_phy_delete(dev_to_phy(dev)); |
183 | return 0; | |
184 | } | |
185 | ||
65c92b09 JB |
186 | /** |
187 | * sas_remove_children -- tear down a devices SAS data structures | |
188 | * @dev: device belonging to the sas object | |
189 | * | |
190 | * Removes all SAS PHYs and remote PHYs for a given object | |
191 | */ | |
192 | void sas_remove_children(struct device *dev) | |
193 | { | |
194 | device_for_each_child(dev, (void *)0, do_sas_phy_delete); | |
195 | device_for_each_child(dev, (void *)1, do_sas_phy_delete); | |
196 | } | |
197 | EXPORT_SYMBOL(sas_remove_children); | |
198 | ||
c7ebbbce CH |
199 | /** |
200 | * sas_remove_host -- tear down a Scsi_Host's SAS data structures | |
201 | * @shost: Scsi Host that is torn down | |
202 | * | |
203 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host. | |
204 | * Must be called just before scsi_remove_host for SAS HBAs. | |
205 | */ | |
206 | void sas_remove_host(struct Scsi_Host *shost) | |
207 | { | |
65c92b09 | 208 | sas_remove_children(&shost->shost_gendev); |
c7ebbbce CH |
209 | } |
210 | EXPORT_SYMBOL(sas_remove_host); | |
211 | ||
212 | ||
213 | /* | |
65c92b09 | 214 | * SAS Phy attributes |
c7ebbbce CH |
215 | */ |
216 | ||
217 | #define sas_phy_show_simple(field, name, format_string, cast) \ | |
218 | static ssize_t \ | |
219 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
220 | { \ | |
221 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
222 | \ | |
223 | return snprintf(buf, 20, format_string, cast phy->field); \ | |
224 | } | |
225 | ||
226 | #define sas_phy_simple_attr(field, name, format_string, type) \ | |
227 | sas_phy_show_simple(field, name, format_string, (type)) \ | |
228 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
229 | ||
230 | #define sas_phy_show_protocol(field, name) \ | |
231 | static ssize_t \ | |
232 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
233 | { \ | |
234 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
235 | \ | |
236 | if (!phy->field) \ | |
237 | return snprintf(buf, 20, "none\n"); \ | |
238 | return get_sas_protocol_names(phy->field, buf); \ | |
239 | } | |
240 | ||
241 | #define sas_phy_protocol_attr(field, name) \ | |
242 | sas_phy_show_protocol(field, name) \ | |
243 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
244 | ||
245 | #define sas_phy_show_linkspeed(field) \ | |
246 | static ssize_t \ | |
247 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
248 | { \ | |
249 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
250 | \ | |
251 | return get_sas_linkspeed_names(phy->field, buf); \ | |
252 | } | |
253 | ||
254 | #define sas_phy_linkspeed_attr(field) \ | |
255 | sas_phy_show_linkspeed(field) \ | |
256 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
257 | ||
c3ee74c4 CH |
258 | #define sas_phy_show_linkerror(field) \ |
259 | static ssize_t \ | |
260 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
261 | { \ | |
262 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
263 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ | |
264 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
265 | int error; \ | |
266 | \ | |
ac01bbbd CH |
267 | if (!phy->local_attached) \ |
268 | return -EINVAL; \ | |
269 | \ | |
dd9fbb52 | 270 | error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \ |
c3ee74c4 CH |
271 | if (error) \ |
272 | return error; \ | |
273 | return snprintf(buf, 20, "%u\n", phy->field); \ | |
274 | } | |
275 | ||
276 | #define sas_phy_linkerror_attr(field) \ | |
277 | sas_phy_show_linkerror(field) \ | |
278 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
279 | ||
280 | ||
c7ebbbce CH |
281 | static ssize_t |
282 | show_sas_device_type(struct class_device *cdev, char *buf) | |
283 | { | |
284 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
285 | ||
286 | if (!phy->identify.device_type) | |
287 | return snprintf(buf, 20, "none\n"); | |
288 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
289 | } | |
c7ebbbce CH |
290 | static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
291 | ||
07ba3a95 CH |
292 | static ssize_t do_sas_phy_reset(struct class_device *cdev, |
293 | size_t count, int hard_reset) | |
294 | { | |
295 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
296 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
297 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
298 | int error; | |
299 | ||
300 | if (!phy->local_attached) | |
301 | return -EINVAL; | |
302 | ||
303 | error = i->f->phy_reset(phy, hard_reset); | |
304 | if (error) | |
305 | return error; | |
306 | return count; | |
307 | }; | |
308 | ||
309 | static ssize_t store_sas_link_reset(struct class_device *cdev, | |
310 | const char *buf, size_t count) | |
311 | { | |
312 | return do_sas_phy_reset(cdev, count, 0); | |
313 | } | |
314 | static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); | |
315 | ||
316 | static ssize_t store_sas_hard_reset(struct class_device *cdev, | |
317 | const char *buf, size_t count) | |
318 | { | |
319 | return do_sas_phy_reset(cdev, count, 1); | |
320 | } | |
321 | static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); | |
322 | ||
c7ebbbce CH |
323 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
324 | initiator_port_protocols); | |
325 | sas_phy_protocol_attr(identify.target_port_protocols, | |
326 | target_port_protocols); | |
327 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
328 | unsigned long long); | |
329 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
65c92b09 | 330 | //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8); |
c7ebbbce CH |
331 | sas_phy_linkspeed_attr(negotiated_linkrate); |
332 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
333 | sas_phy_linkspeed_attr(minimum_linkrate); | |
334 | sas_phy_linkspeed_attr(maximum_linkrate_hw); | |
335 | sas_phy_linkspeed_attr(maximum_linkrate); | |
c3ee74c4 CH |
336 | sas_phy_linkerror_attr(invalid_dword_count); |
337 | sas_phy_linkerror_attr(running_disparity_error_count); | |
338 | sas_phy_linkerror_attr(loss_of_dword_sync_count); | |
339 | sas_phy_linkerror_attr(phy_reset_problem_count); | |
c7ebbbce CH |
340 | |
341 | ||
342 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
343 | "sas_phy", NULL, NULL, NULL); | |
344 | ||
345 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
346 | { | |
347 | struct Scsi_Host *shost; | |
348 | struct sas_internal *i; | |
349 | ||
350 | if (!scsi_is_sas_phy(dev)) | |
351 | return 0; | |
352 | shost = dev_to_shost(dev->parent); | |
353 | ||
354 | if (!shost->transportt) | |
355 | return 0; | |
356 | if (shost->transportt->host_attrs.ac.class != | |
357 | &sas_host_class.class) | |
358 | return 0; | |
359 | ||
360 | i = to_sas_internal(shost->transportt); | |
361 | return &i->phy_attr_cont.ac == cont; | |
362 | } | |
363 | ||
364 | static void sas_phy_release(struct device *dev) | |
365 | { | |
366 | struct sas_phy *phy = dev_to_phy(dev); | |
367 | ||
368 | put_device(dev->parent); | |
369 | kfree(phy); | |
370 | } | |
371 | ||
372 | /** | |
373 | * sas_phy_alloc -- allocates and initialize a SAS PHY structure | |
374 | * @parent: Parent device | |
d99ca418 | 375 | * @number: Phy index |
c7ebbbce CH |
376 | * |
377 | * Allocates an SAS PHY structure. It will be added in the device tree | |
378 | * below the device specified by @parent, which has to be either a Scsi_Host | |
379 | * or sas_rphy. | |
380 | * | |
381 | * Returns: | |
382 | * SAS PHY allocated or %NULL if the allocation failed. | |
383 | */ | |
384 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
385 | { | |
386 | struct Scsi_Host *shost = dev_to_shost(parent); | |
387 | struct sas_phy *phy; | |
388 | ||
24669f75 | 389 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); |
c7ebbbce CH |
390 | if (!phy) |
391 | return NULL; | |
c7ebbbce | 392 | |
c7ebbbce CH |
393 | phy->number = number; |
394 | ||
395 | device_initialize(&phy->dev); | |
396 | phy->dev.parent = get_device(parent); | |
397 | phy->dev.release = sas_phy_release; | |
65c92b09 | 398 | INIT_LIST_HEAD(&phy->port_siblings); |
79cb1819 JB |
399 | if (scsi_is_sas_expander_device(parent)) { |
400 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
65c92b09 | 401 | sprintf(phy->dev.bus_id, "phy-%d:%d:%d", shost->host_no, |
79cb1819 JB |
402 | rphy->scsi_target_id, number); |
403 | } else | |
404 | sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); | |
c7ebbbce CH |
405 | |
406 | transport_setup_device(&phy->dev); | |
407 | ||
408 | return phy; | |
409 | } | |
410 | EXPORT_SYMBOL(sas_phy_alloc); | |
411 | ||
412 | /** | |
413 | * sas_phy_add -- add a SAS PHY to the device hierachy | |
414 | * @phy: The PHY to be added | |
415 | * | |
416 | * Publishes a SAS PHY to the rest of the system. | |
417 | */ | |
418 | int sas_phy_add(struct sas_phy *phy) | |
419 | { | |
420 | int error; | |
421 | ||
422 | error = device_add(&phy->dev); | |
423 | if (!error) { | |
424 | transport_add_device(&phy->dev); | |
425 | transport_configure_device(&phy->dev); | |
426 | } | |
427 | ||
428 | return error; | |
429 | } | |
430 | EXPORT_SYMBOL(sas_phy_add); | |
431 | ||
432 | /** | |
433 | * sas_phy_free -- free a SAS PHY | |
434 | * @phy: SAS PHY to free | |
435 | * | |
436 | * Frees the specified SAS PHY. | |
437 | * | |
438 | * Note: | |
439 | * This function must only be called on a PHY that has not | |
440 | * sucessfully been added using sas_phy_add(). | |
441 | */ | |
442 | void sas_phy_free(struct sas_phy *phy) | |
443 | { | |
444 | transport_destroy_device(&phy->dev); | |
92aab646 | 445 | put_device(&phy->dev); |
c7ebbbce CH |
446 | } |
447 | EXPORT_SYMBOL(sas_phy_free); | |
448 | ||
449 | /** | |
450 | * sas_phy_delete -- remove SAS PHY | |
451 | * @phy: SAS PHY to remove | |
452 | * | |
453 | * Removes the specified SAS PHY. If the SAS PHY has an | |
454 | * associated remote PHY it is removed before. | |
455 | */ | |
456 | void | |
457 | sas_phy_delete(struct sas_phy *phy) | |
458 | { | |
459 | struct device *dev = &phy->dev; | |
460 | ||
65c92b09 JB |
461 | /* this happens if the phy is still part of a port when deleted */ |
462 | BUG_ON(!list_empty(&phy->port_siblings)); | |
c7ebbbce CH |
463 | |
464 | transport_remove_device(dev); | |
465 | device_del(dev); | |
466 | transport_destroy_device(dev); | |
92aab646 | 467 | put_device(dev); |
c7ebbbce CH |
468 | } |
469 | EXPORT_SYMBOL(sas_phy_delete); | |
470 | ||
471 | /** | |
472 | * scsi_is_sas_phy -- check if a struct device represents a SAS PHY | |
473 | * @dev: device to check | |
474 | * | |
475 | * Returns: | |
476 | * %1 if the device represents a SAS PHY, %0 else | |
477 | */ | |
478 | int scsi_is_sas_phy(const struct device *dev) | |
479 | { | |
480 | return dev->release == sas_phy_release; | |
481 | } | |
482 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
483 | ||
65c92b09 JB |
484 | /* |
485 | * SAS Port attributes | |
486 | */ | |
487 | #define sas_port_show_simple(field, name, format_string, cast) \ | |
488 | static ssize_t \ | |
489 | show_sas_port_##name(struct class_device *cdev, char *buf) \ | |
490 | { \ | |
491 | struct sas_port *port = transport_class_to_sas_port(cdev); \ | |
492 | \ | |
493 | return snprintf(buf, 20, format_string, cast port->field); \ | |
494 | } | |
495 | ||
496 | #define sas_port_simple_attr(field, name, format_string, type) \ | |
497 | sas_port_show_simple(field, name, format_string, (type)) \ | |
498 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL) | |
499 | ||
500 | sas_port_simple_attr(num_phys, num_phys, "%d\n", int); | |
501 | ||
502 | static DECLARE_TRANSPORT_CLASS(sas_port_class, | |
503 | "sas_port", NULL, NULL, NULL); | |
504 | ||
505 | static int sas_port_match(struct attribute_container *cont, struct device *dev) | |
506 | { | |
507 | struct Scsi_Host *shost; | |
508 | struct sas_internal *i; | |
509 | ||
510 | if (!scsi_is_sas_port(dev)) | |
511 | return 0; | |
512 | shost = dev_to_shost(dev->parent); | |
513 | ||
514 | if (!shost->transportt) | |
515 | return 0; | |
516 | if (shost->transportt->host_attrs.ac.class != | |
517 | &sas_host_class.class) | |
518 | return 0; | |
519 | ||
520 | i = to_sas_internal(shost->transportt); | |
521 | return &i->port_attr_cont.ac == cont; | |
522 | } | |
523 | ||
524 | ||
525 | static void sas_port_release(struct device *dev) | |
526 | { | |
527 | struct sas_port *port = dev_to_sas_port(dev); | |
528 | ||
529 | BUG_ON(!list_empty(&port->phy_list)); | |
530 | ||
531 | put_device(dev->parent); | |
532 | kfree(port); | |
533 | } | |
534 | ||
535 | static void sas_port_create_link(struct sas_port *port, | |
536 | struct sas_phy *phy) | |
537 | { | |
538 | sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, phy->dev.bus_id); | |
539 | sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port"); | |
540 | } | |
541 | ||
542 | static void sas_port_delete_link(struct sas_port *port, | |
543 | struct sas_phy *phy) | |
544 | { | |
545 | sysfs_remove_link(&port->dev.kobj, phy->dev.bus_id); | |
546 | sysfs_remove_link(&phy->dev.kobj, "port"); | |
547 | } | |
548 | ||
549 | /** sas_port_alloc - allocate and initialize a SAS port structure | |
550 | * | |
551 | * @parent: parent device | |
552 | * @port_id: port number | |
553 | * | |
554 | * Allocates a SAS port structure. It will be added to the device tree | |
555 | * below the device specified by @parent which must be either a Scsi_Host | |
556 | * or a sas_expander_device. | |
557 | * | |
558 | * Returns %NULL on error | |
559 | */ | |
560 | struct sas_port *sas_port_alloc(struct device *parent, int port_id) | |
561 | { | |
562 | struct Scsi_Host *shost = dev_to_shost(parent); | |
563 | struct sas_port *port; | |
564 | ||
565 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
566 | if (!port) | |
567 | return NULL; | |
568 | ||
569 | port->port_identifier = port_id; | |
570 | ||
571 | device_initialize(&port->dev); | |
572 | ||
573 | port->dev.parent = get_device(parent); | |
574 | port->dev.release = sas_port_release; | |
575 | ||
576 | mutex_init(&port->phy_list_mutex); | |
577 | INIT_LIST_HEAD(&port->phy_list); | |
578 | ||
579 | if (scsi_is_sas_expander_device(parent)) { | |
580 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
581 | sprintf(port->dev.bus_id, "port-%d:%d:%d", shost->host_no, | |
582 | rphy->scsi_target_id, port->port_identifier); | |
583 | } else | |
584 | sprintf(port->dev.bus_id, "port-%d:%d", shost->host_no, | |
585 | port->port_identifier); | |
586 | ||
587 | transport_setup_device(&port->dev); | |
588 | ||
589 | return port; | |
590 | } | |
591 | EXPORT_SYMBOL(sas_port_alloc); | |
592 | ||
593 | /** | |
594 | * sas_port_add - add a SAS port to the device hierarchy | |
595 | * | |
596 | * @port: port to be added | |
597 | * | |
598 | * publishes a port to the rest of the system | |
599 | */ | |
600 | int sas_port_add(struct sas_port *port) | |
601 | { | |
602 | int error; | |
603 | ||
604 | /* No phys should be added until this is made visible */ | |
605 | BUG_ON(!list_empty(&port->phy_list)); | |
606 | ||
607 | error = device_add(&port->dev); | |
608 | ||
609 | if (error) | |
610 | return error; | |
611 | ||
612 | transport_add_device(&port->dev); | |
613 | transport_configure_device(&port->dev); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | EXPORT_SYMBOL(sas_port_add); | |
618 | ||
619 | /** | |
620 | * sas_port_free -- free a SAS PORT | |
621 | * @port: SAS PORT to free | |
622 | * | |
623 | * Frees the specified SAS PORT. | |
624 | * | |
625 | * Note: | |
626 | * This function must only be called on a PORT that has not | |
627 | * sucessfully been added using sas_port_add(). | |
628 | */ | |
629 | void sas_port_free(struct sas_port *port) | |
630 | { | |
631 | transport_destroy_device(&port->dev); | |
632 | put_device(&port->dev); | |
633 | } | |
634 | EXPORT_SYMBOL(sas_port_free); | |
635 | ||
636 | /** | |
637 | * sas_port_delete -- remove SAS PORT | |
638 | * @port: SAS PORT to remove | |
639 | * | |
640 | * Removes the specified SAS PORT. If the SAS PORT has an | |
641 | * associated phys, unlink them from the port as well. | |
642 | */ | |
643 | void sas_port_delete(struct sas_port *port) | |
644 | { | |
645 | struct device *dev = &port->dev; | |
646 | struct sas_phy *phy, *tmp_phy; | |
647 | ||
648 | if (port->rphy) { | |
649 | sas_rphy_delete(port->rphy); | |
650 | port->rphy = NULL; | |
651 | } | |
652 | ||
653 | mutex_lock(&port->phy_list_mutex); | |
654 | list_for_each_entry_safe(phy, tmp_phy, &port->phy_list, | |
655 | port_siblings) { | |
656 | sas_port_delete_link(port, phy); | |
657 | list_del_init(&phy->port_siblings); | |
658 | } | |
659 | mutex_unlock(&port->phy_list_mutex); | |
660 | ||
661 | transport_remove_device(dev); | |
662 | device_del(dev); | |
663 | transport_destroy_device(dev); | |
664 | put_device(dev); | |
665 | } | |
666 | EXPORT_SYMBOL(sas_port_delete); | |
667 | ||
668 | /** | |
669 | * scsi_is_sas_port -- check if a struct device represents a SAS port | |
670 | * @dev: device to check | |
671 | * | |
672 | * Returns: | |
673 | * %1 if the device represents a SAS Port, %0 else | |
674 | */ | |
675 | int scsi_is_sas_port(const struct device *dev) | |
676 | { | |
677 | return dev->release == sas_port_release; | |
678 | } | |
679 | EXPORT_SYMBOL(scsi_is_sas_port); | |
680 | ||
681 | /** | |
682 | * sas_port_add_phy - add another phy to a port to form a wide port | |
683 | * @port: port to add the phy to | |
684 | * @phy: phy to add | |
685 | * | |
686 | * When a port is initially created, it is empty (has no phys). All | |
687 | * ports must have at least one phy to operated, and all wide ports | |
688 | * must have at least two. The current code makes no difference | |
689 | * between ports and wide ports, but the only object that can be | |
690 | * connected to a remote device is a port, so ports must be formed on | |
691 | * all devices with phys if they're connected to anything. | |
692 | */ | |
693 | void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy) | |
694 | { | |
695 | mutex_lock(&port->phy_list_mutex); | |
696 | if (unlikely(!list_empty(&phy->port_siblings))) { | |
697 | /* make sure we're already on this port */ | |
698 | struct sas_phy *tmp; | |
699 | ||
700 | list_for_each_entry(tmp, &port->phy_list, port_siblings) | |
701 | if (tmp == phy) | |
702 | break; | |
703 | /* If this trips, you added a phy that was already | |
704 | * part of a different port */ | |
705 | if (unlikely(tmp != phy)) { | |
706 | dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", phy->dev.bus_id); | |
707 | BUG(); | |
708 | } | |
709 | } else { | |
710 | sas_port_create_link(port, phy); | |
711 | list_add_tail(&phy->port_siblings, &port->phy_list); | |
712 | port->num_phys++; | |
713 | } | |
714 | mutex_unlock(&port->phy_list_mutex); | |
715 | } | |
716 | EXPORT_SYMBOL(sas_port_add_phy); | |
717 | ||
718 | /** | |
719 | * sas_port_delete_phy - remove a phy from a port or wide port | |
720 | * @port: port to remove the phy from | |
721 | * @phy: phy to remove | |
722 | * | |
723 | * This operation is used for tearing down ports again. It must be | |
724 | * done to every port or wide port before calling sas_port_delete. | |
725 | */ | |
726 | void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy) | |
727 | { | |
728 | mutex_lock(&port->phy_list_mutex); | |
729 | sas_port_delete_link(port, phy); | |
730 | list_del_init(&phy->port_siblings); | |
731 | port->num_phys--; | |
732 | mutex_unlock(&port->phy_list_mutex); | |
733 | } | |
734 | EXPORT_SYMBOL(sas_port_delete_phy); | |
735 | ||
c7ebbbce CH |
736 | /* |
737 | * SAS remote PHY attributes. | |
738 | */ | |
739 | ||
740 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
741 | static ssize_t \ | |
742 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
743 | { \ | |
744 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
745 | \ | |
746 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
747 | } | |
748 | ||
749 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
750 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
751 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
752 | show_sas_rphy_##name, NULL) | |
753 | ||
754 | #define sas_rphy_show_protocol(field, name) \ | |
755 | static ssize_t \ | |
756 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
757 | { \ | |
758 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
759 | \ | |
760 | if (!rphy->field) \ | |
761 | return snprintf(buf, 20, "none\n"); \ | |
762 | return get_sas_protocol_names(rphy->field, buf); \ | |
763 | } | |
764 | ||
765 | #define sas_rphy_protocol_attr(field, name) \ | |
766 | sas_rphy_show_protocol(field, name) \ | |
767 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
768 | show_sas_rphy_##name, NULL) | |
769 | ||
770 | static ssize_t | |
771 | show_sas_rphy_device_type(struct class_device *cdev, char *buf) | |
772 | { | |
773 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
774 | ||
775 | if (!rphy->identify.device_type) | |
776 | return snprintf(buf, 20, "none\n"); | |
777 | return get_sas_device_type_names( | |
778 | rphy->identify.device_type, buf); | |
779 | } | |
780 | ||
781 | static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO, | |
782 | show_sas_rphy_device_type, NULL); | |
783 | ||
a0125641 CH |
784 | static ssize_t |
785 | show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf) | |
786 | { | |
787 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
788 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); | |
789 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
790 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
791 | u64 identifier; | |
792 | int error; | |
793 | ||
794 | /* | |
795 | * Only devices behind an expander are supported, because the | |
796 | * enclosure identifier is a SMP feature. | |
797 | */ | |
798 | if (phy->local_attached) | |
799 | return -EINVAL; | |
800 | ||
801 | error = i->f->get_enclosure_identifier(rphy, &identifier); | |
802 | if (error) | |
803 | return error; | |
804 | return sprintf(buf, "0x%llx\n", (unsigned long long)identifier); | |
805 | } | |
806 | ||
807 | static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO, | |
808 | show_sas_rphy_enclosure_identifier, NULL); | |
809 | ||
810 | static ssize_t | |
811 | show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf) | |
812 | { | |
813 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
814 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); | |
815 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
816 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
817 | int val; | |
818 | ||
819 | if (phy->local_attached) | |
820 | return -EINVAL; | |
821 | ||
822 | val = i->f->get_bay_identifier(rphy); | |
823 | if (val < 0) | |
824 | return val; | |
825 | return sprintf(buf, "%d\n", val); | |
826 | } | |
827 | ||
828 | static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO, | |
829 | show_sas_rphy_bay_identifier, NULL); | |
830 | ||
c7ebbbce CH |
831 | sas_rphy_protocol_attr(identify.initiator_port_protocols, |
832 | initiator_port_protocols); | |
833 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
834 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
835 | unsigned long long); | |
836 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
837 | ||
42ab0360 JB |
838 | /* only need 8 bytes of data plus header (4 or 8) */ |
839 | #define BUF_SIZE 64 | |
840 | ||
841 | int sas_read_port_mode_page(struct scsi_device *sdev) | |
842 | { | |
843 | char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata; | |
844 | struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target); | |
845 | struct sas_end_device *rdev; | |
846 | struct scsi_mode_data mode_data; | |
847 | int res, error; | |
848 | ||
849 | BUG_ON(rphy->identify.device_type != SAS_END_DEVICE); | |
850 | ||
851 | rdev = rphy_to_end_device(rphy); | |
852 | ||
853 | if (!buffer) | |
854 | return -ENOMEM; | |
855 | ||
856 | res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3, | |
857 | &mode_data, NULL); | |
858 | ||
859 | error = -EINVAL; | |
860 | if (!scsi_status_is_good(res)) | |
861 | goto out; | |
862 | ||
863 | msdata = buffer + mode_data.header_length + | |
864 | mode_data.block_descriptor_length; | |
865 | ||
866 | if (msdata - buffer > BUF_SIZE - 8) | |
867 | goto out; | |
868 | ||
869 | error = 0; | |
870 | ||
871 | rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0; | |
872 | rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5]; | |
873 | rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7]; | |
874 | ||
875 | out: | |
876 | kfree(buffer); | |
877 | return error; | |
878 | } | |
879 | EXPORT_SYMBOL(sas_read_port_mode_page); | |
880 | ||
79cb1819 JB |
881 | static DECLARE_TRANSPORT_CLASS(sas_end_dev_class, |
882 | "sas_end_device", NULL, NULL, NULL); | |
883 | ||
42ab0360 JB |
884 | #define sas_end_dev_show_simple(field, name, format_string, cast) \ |
885 | static ssize_t \ | |
886 | show_sas_end_dev_##name(struct class_device *cdev, char *buf) \ | |
887 | { \ | |
888 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
889 | struct sas_end_device *rdev = rphy_to_end_device(rphy); \ | |
890 | \ | |
891 | return snprintf(buf, 20, format_string, cast rdev->field); \ | |
892 | } | |
893 | ||
894 | #define sas_end_dev_simple_attr(field, name, format_string, type) \ | |
895 | sas_end_dev_show_simple(field, name, format_string, (type)) \ | |
896 | static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \ | |
897 | show_sas_end_dev_##name, NULL) | |
898 | ||
899 | sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int); | |
900 | sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout, | |
901 | "%d\n", int); | |
902 | sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout, | |
903 | "%d\n", int); | |
904 | ||
79cb1819 JB |
905 | static DECLARE_TRANSPORT_CLASS(sas_expander_class, |
906 | "sas_expander", NULL, NULL, NULL); | |
907 | ||
908 | #define sas_expander_show_simple(field, name, format_string, cast) \ | |
909 | static ssize_t \ | |
910 | show_sas_expander_##name(struct class_device *cdev, char *buf) \ | |
911 | { \ | |
912 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
913 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); \ | |
914 | \ | |
915 | return snprintf(buf, 20, format_string, cast edev->field); \ | |
916 | } | |
917 | ||
918 | #define sas_expander_simple_attr(field, name, format_string, type) \ | |
919 | sas_expander_show_simple(field, name, format_string, (type)) \ | |
920 | static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO, \ | |
921 | show_sas_expander_##name, NULL) | |
922 | ||
923 | sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *); | |
924 | sas_expander_simple_attr(product_id, product_id, "%s\n", char *); | |
925 | sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *); | |
926 | sas_expander_simple_attr(component_vendor_id, component_vendor_id, | |
927 | "%s\n", char *); | |
928 | sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int); | |
929 | sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n", | |
930 | unsigned int); | |
931 | sas_expander_simple_attr(level, level, "%d\n", int); | |
42ab0360 | 932 | |
c7ebbbce | 933 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, |
2f8600df | 934 | "sas_device", NULL, NULL, NULL); |
c7ebbbce CH |
935 | |
936 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
937 | { | |
938 | struct Scsi_Host *shost; | |
939 | struct sas_internal *i; | |
940 | ||
941 | if (!scsi_is_sas_rphy(dev)) | |
942 | return 0; | |
943 | shost = dev_to_shost(dev->parent->parent); | |
944 | ||
945 | if (!shost->transportt) | |
946 | return 0; | |
947 | if (shost->transportt->host_attrs.ac.class != | |
948 | &sas_host_class.class) | |
949 | return 0; | |
950 | ||
951 | i = to_sas_internal(shost->transportt); | |
952 | return &i->rphy_attr_cont.ac == cont; | |
953 | } | |
954 | ||
42ab0360 JB |
955 | static int sas_end_dev_match(struct attribute_container *cont, |
956 | struct device *dev) | |
957 | { | |
958 | struct Scsi_Host *shost; | |
959 | struct sas_internal *i; | |
960 | struct sas_rphy *rphy; | |
961 | ||
962 | if (!scsi_is_sas_rphy(dev)) | |
963 | return 0; | |
964 | shost = dev_to_shost(dev->parent->parent); | |
965 | rphy = dev_to_rphy(dev); | |
966 | ||
967 | if (!shost->transportt) | |
968 | return 0; | |
969 | if (shost->transportt->host_attrs.ac.class != | |
970 | &sas_host_class.class) | |
971 | return 0; | |
972 | ||
973 | i = to_sas_internal(shost->transportt); | |
974 | return &i->end_dev_attr_cont.ac == cont && | |
2f8600df | 975 | rphy->identify.device_type == SAS_END_DEVICE; |
42ab0360 JB |
976 | } |
977 | ||
79cb1819 JB |
978 | static int sas_expander_match(struct attribute_container *cont, |
979 | struct device *dev) | |
980 | { | |
981 | struct Scsi_Host *shost; | |
982 | struct sas_internal *i; | |
983 | struct sas_rphy *rphy; | |
984 | ||
985 | if (!scsi_is_sas_rphy(dev)) | |
986 | return 0; | |
987 | shost = dev_to_shost(dev->parent->parent); | |
988 | rphy = dev_to_rphy(dev); | |
989 | ||
990 | if (!shost->transportt) | |
991 | return 0; | |
992 | if (shost->transportt->host_attrs.ac.class != | |
993 | &sas_host_class.class) | |
994 | return 0; | |
995 | ||
996 | i = to_sas_internal(shost->transportt); | |
997 | return &i->expander_attr_cont.ac == cont && | |
998 | (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE || | |
2f8600df | 999 | rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE); |
79cb1819 JB |
1000 | } |
1001 | ||
2f8600df | 1002 | static void sas_expander_release(struct device *dev) |
c7ebbbce CH |
1003 | { |
1004 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
2f8600df | 1005 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
c7ebbbce CH |
1006 | |
1007 | put_device(dev->parent); | |
2f8600df | 1008 | kfree(edev); |
c7ebbbce CH |
1009 | } |
1010 | ||
2f8600df | 1011 | static void sas_end_device_release(struct device *dev) |
c7ebbbce | 1012 | { |
2f8600df JB |
1013 | struct sas_rphy *rphy = dev_to_rphy(dev); |
1014 | struct sas_end_device *edev = rphy_to_end_device(rphy); | |
c7ebbbce | 1015 | |
2f8600df JB |
1016 | put_device(dev->parent); |
1017 | kfree(edev); | |
c7ebbbce | 1018 | } |
c7ebbbce | 1019 | |
c5943d36 JB |
1020 | /** |
1021 | * sas_rphy_initialize - common rphy intialization | |
1022 | * @rphy: rphy to initialise | |
1023 | * | |
1024 | * Used by both sas_end_device_alloc() and sas_expander_alloc() to | |
1025 | * initialise the common rphy component of each. | |
1026 | */ | |
1027 | static void sas_rphy_initialize(struct sas_rphy *rphy) | |
1028 | { | |
1029 | INIT_LIST_HEAD(&rphy->list); | |
1030 | } | |
1031 | ||
42ab0360 JB |
1032 | /** |
1033 | * sas_end_device_alloc - allocate an rphy for an end device | |
1034 | * | |
1035 | * Allocates an SAS remote PHY structure, connected to @parent. | |
1036 | * | |
1037 | * Returns: | |
1038 | * SAS PHY allocated or %NULL if the allocation failed. | |
1039 | */ | |
65c92b09 | 1040 | struct sas_rphy *sas_end_device_alloc(struct sas_port *parent) |
42ab0360 JB |
1041 | { |
1042 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
1043 | struct sas_end_device *rdev; | |
1044 | ||
1045 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); | |
1046 | if (!rdev) { | |
42ab0360 JB |
1047 | return NULL; |
1048 | } | |
1049 | ||
1050 | device_initialize(&rdev->rphy.dev); | |
1051 | rdev->rphy.dev.parent = get_device(&parent->dev); | |
2f8600df | 1052 | rdev->rphy.dev.release = sas_end_device_release; |
65c92b09 JB |
1053 | if (scsi_is_sas_expander_device(parent->dev.parent)) { |
1054 | struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent); | |
1055 | sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d:%d", | |
1056 | shost->host_no, rphy->scsi_target_id, parent->port_identifier); | |
1057 | } else | |
1058 | sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d", | |
1059 | shost->host_no, parent->port_identifier); | |
42ab0360 | 1060 | rdev->rphy.identify.device_type = SAS_END_DEVICE; |
c5943d36 | 1061 | sas_rphy_initialize(&rdev->rphy); |
42ab0360 JB |
1062 | transport_setup_device(&rdev->rphy.dev); |
1063 | ||
1064 | return &rdev->rphy; | |
1065 | } | |
1066 | EXPORT_SYMBOL(sas_end_device_alloc); | |
1067 | ||
79cb1819 JB |
1068 | /** |
1069 | * sas_expander_alloc - allocate an rphy for an end device | |
1070 | * | |
1071 | * Allocates an SAS remote PHY structure, connected to @parent. | |
1072 | * | |
1073 | * Returns: | |
1074 | * SAS PHY allocated or %NULL if the allocation failed. | |
1075 | */ | |
65c92b09 | 1076 | struct sas_rphy *sas_expander_alloc(struct sas_port *parent, |
79cb1819 JB |
1077 | enum sas_device_type type) |
1078 | { | |
1079 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
1080 | struct sas_expander_device *rdev; | |
1081 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1082 | ||
1083 | BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE && | |
1084 | type != SAS_FANOUT_EXPANDER_DEVICE); | |
1085 | ||
1086 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); | |
1087 | if (!rdev) { | |
79cb1819 JB |
1088 | return NULL; |
1089 | } | |
1090 | ||
1091 | device_initialize(&rdev->rphy.dev); | |
1092 | rdev->rphy.dev.parent = get_device(&parent->dev); | |
2f8600df | 1093 | rdev->rphy.dev.release = sas_expander_release; |
79cb1819 JB |
1094 | mutex_lock(&sas_host->lock); |
1095 | rdev->rphy.scsi_target_id = sas_host->next_expander_id++; | |
1096 | mutex_unlock(&sas_host->lock); | |
1097 | sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d", | |
1098 | shost->host_no, rdev->rphy.scsi_target_id); | |
1099 | rdev->rphy.identify.device_type = type; | |
c5943d36 | 1100 | sas_rphy_initialize(&rdev->rphy); |
79cb1819 JB |
1101 | transport_setup_device(&rdev->rphy.dev); |
1102 | ||
1103 | return &rdev->rphy; | |
1104 | } | |
1105 | EXPORT_SYMBOL(sas_expander_alloc); | |
42ab0360 | 1106 | |
c7ebbbce CH |
1107 | /** |
1108 | * sas_rphy_add -- add a SAS remote PHY to the device hierachy | |
1109 | * @rphy: The remote PHY to be added | |
1110 | * | |
1111 | * Publishes a SAS remote PHY to the rest of the system. | |
1112 | */ | |
1113 | int sas_rphy_add(struct sas_rphy *rphy) | |
1114 | { | |
65c92b09 | 1115 | struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); |
c7ebbbce CH |
1116 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); |
1117 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1118 | struct sas_identify *identify = &rphy->identify; | |
1119 | int error; | |
1120 | ||
1121 | if (parent->rphy) | |
1122 | return -ENXIO; | |
1123 | parent->rphy = rphy; | |
1124 | ||
1125 | error = device_add(&rphy->dev); | |
1126 | if (error) | |
1127 | return error; | |
1128 | transport_add_device(&rphy->dev); | |
1129 | transport_configure_device(&rphy->dev); | |
1130 | ||
e02f3f59 | 1131 | mutex_lock(&sas_host->lock); |
c7ebbbce CH |
1132 | list_add_tail(&rphy->list, &sas_host->rphy_list); |
1133 | if (identify->device_type == SAS_END_DEVICE && | |
1134 | (identify->target_port_protocols & | |
1135 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
1136 | rphy->scsi_target_id = sas_host->next_target_id++; | |
7676f83a JB |
1137 | else if (identify->device_type == SAS_END_DEVICE) |
1138 | rphy->scsi_target_id = -1; | |
e02f3f59 | 1139 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1140 | |
79cb1819 JB |
1141 | if (identify->device_type == SAS_END_DEVICE && |
1142 | rphy->scsi_target_id != -1) { | |
e6bc863c | 1143 | scsi_scan_target(&rphy->dev, parent->port_identifier, |
c7ebbbce CH |
1144 | rphy->scsi_target_id, ~0, 0); |
1145 | } | |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | EXPORT_SYMBOL(sas_rphy_add); | |
1150 | ||
1151 | /** | |
1152 | * sas_rphy_free -- free a SAS remote PHY | |
1153 | * @rphy SAS remote PHY to free | |
1154 | * | |
1155 | * Frees the specified SAS remote PHY. | |
1156 | * | |
1157 | * Note: | |
1158 | * This function must only be called on a remote | |
1159 | * PHY that has not sucessfully been added using | |
1160 | * sas_rphy_add(). | |
1161 | */ | |
1162 | void sas_rphy_free(struct sas_rphy *rphy) | |
1163 | { | |
92aab646 | 1164 | struct device *dev = &rphy->dev; |
c7ebbbce CH |
1165 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); |
1166 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1167 | ||
e02f3f59 | 1168 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1169 | list_del(&rphy->list); |
e02f3f59 | 1170 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1171 | |
92aab646 | 1172 | transport_destroy_device(dev); |
2f8600df | 1173 | |
92aab646 | 1174 | put_device(dev); |
c7ebbbce CH |
1175 | } |
1176 | EXPORT_SYMBOL(sas_rphy_free); | |
1177 | ||
1178 | /** | |
1179 | * sas_rphy_delete -- remove SAS remote PHY | |
1180 | * @rphy: SAS remote PHY to remove | |
1181 | * | |
1182 | * Removes the specified SAS remote PHY. | |
1183 | */ | |
1184 | void | |
1185 | sas_rphy_delete(struct sas_rphy *rphy) | |
1186 | { | |
1187 | struct device *dev = &rphy->dev; | |
65c92b09 | 1188 | struct sas_port *parent = dev_to_sas_port(dev->parent); |
c7ebbbce CH |
1189 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); |
1190 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1191 | ||
d4054239 CH |
1192 | switch (rphy->identify.device_type) { |
1193 | case SAS_END_DEVICE: | |
1194 | scsi_remove_target(dev); | |
1195 | break; | |
1196 | case SAS_EDGE_EXPANDER_DEVICE: | |
1197 | case SAS_FANOUT_EXPANDER_DEVICE: | |
65c92b09 | 1198 | sas_remove_children(dev); |
d4054239 CH |
1199 | break; |
1200 | default: | |
1201 | break; | |
1202 | } | |
c7ebbbce | 1203 | |
fe8b2304 CH |
1204 | transport_remove_device(dev); |
1205 | device_del(dev); | |
1206 | transport_destroy_device(dev); | |
c7ebbbce | 1207 | |
e02f3f59 | 1208 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1209 | list_del(&rphy->list); |
e02f3f59 | 1210 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1211 | |
33b114e9 CH |
1212 | parent->rphy = NULL; |
1213 | ||
92aab646 | 1214 | put_device(dev); |
c7ebbbce CH |
1215 | } |
1216 | EXPORT_SYMBOL(sas_rphy_delete); | |
1217 | ||
1218 | /** | |
1219 | * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY | |
1220 | * @dev: device to check | |
1221 | * | |
1222 | * Returns: | |
1223 | * %1 if the device represents a SAS remote PHY, %0 else | |
1224 | */ | |
1225 | int scsi_is_sas_rphy(const struct device *dev) | |
1226 | { | |
2f8600df JB |
1227 | return dev->release == sas_end_device_release || |
1228 | dev->release == sas_expander_release; | |
c7ebbbce CH |
1229 | } |
1230 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
1231 | ||
1232 | ||
1233 | /* | |
1234 | * SCSI scan helper | |
1235 | */ | |
1236 | ||
e02f3f59 CH |
1237 | static int sas_user_scan(struct Scsi_Host *shost, uint channel, |
1238 | uint id, uint lun) | |
c7ebbbce CH |
1239 | { |
1240 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1241 | struct sas_rphy *rphy; | |
c7ebbbce | 1242 | |
e02f3f59 | 1243 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1244 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { |
65c92b09 | 1245 | struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); |
e02f3f59 | 1246 | |
6d99a3f3 JB |
1247 | if (rphy->identify.device_type != SAS_END_DEVICE || |
1248 | rphy->scsi_target_id == -1) | |
e02f3f59 CH |
1249 | continue; |
1250 | ||
e6bc863c | 1251 | if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) && |
e02f3f59 | 1252 | (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { |
e6bc863c | 1253 | scsi_scan_target(&rphy->dev, parent->port_identifier, |
e02f3f59 CH |
1254 | rphy->scsi_target_id, lun, 1); |
1255 | } | |
c7ebbbce | 1256 | } |
e02f3f59 | 1257 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1258 | |
e02f3f59 | 1259 | return 0; |
c7ebbbce CH |
1260 | } |
1261 | ||
1262 | ||
1263 | /* | |
1264 | * Setup / Teardown code | |
1265 | */ | |
1266 | ||
42ab0360 JB |
1267 | #define SETUP_TEMPLATE(attrb, field, perm, test) \ |
1268 | i->private_##attrb[count] = class_device_attr_##field; \ | |
1269 | i->private_##attrb[count].attr.mode = perm; \ | |
42ab0360 JB |
1270 | i->attrb[count] = &i->private_##attrb[count]; \ |
1271 | if (test) \ | |
1272 | count++ | |
1273 | ||
1274 | ||
1275 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
1276 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1) | |
c7ebbbce | 1277 | |
dd9fbb52 | 1278 | #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \ |
42ab0360 | 1279 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func) |
dd9fbb52 | 1280 | |
65c92b09 | 1281 | #define SETUP_PHY_ATTRIBUTE(field) \ |
42ab0360 | 1282 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) |
c7ebbbce | 1283 | |
65c92b09 JB |
1284 | #define SETUP_PORT_ATTRIBUTE(field) \ |
1285 | SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) | |
1286 | ||
1287 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \ | |
42ab0360 | 1288 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) |
dd9fbb52 | 1289 | |
65c92b09 | 1290 | #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \ |
42ab0360 | 1291 | SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1) |
07ba3a95 | 1292 | |
65c92b09 | 1293 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \ |
42ab0360 | 1294 | SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func) |
dd9fbb52 | 1295 | |
42ab0360 JB |
1296 | #define SETUP_END_DEV_ATTRIBUTE(field) \ |
1297 | SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1) | |
c7ebbbce | 1298 | |
79cb1819 JB |
1299 | #define SETUP_EXPANDER_ATTRIBUTE(field) \ |
1300 | SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1) | |
1301 | ||
c7ebbbce CH |
1302 | /** |
1303 | * sas_attach_transport -- instantiate SAS transport template | |
1304 | * @ft: SAS transport class function template | |
1305 | */ | |
1306 | struct scsi_transport_template * | |
1307 | sas_attach_transport(struct sas_function_template *ft) | |
1308 | { | |
1309 | struct sas_internal *i; | |
1310 | int count; | |
1311 | ||
24669f75 | 1312 | i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL); |
c7ebbbce CH |
1313 | if (!i) |
1314 | return NULL; | |
c7ebbbce | 1315 | |
e02f3f59 | 1316 | i->t.user_scan = sas_user_scan; |
c7ebbbce CH |
1317 | |
1318 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1319 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
1320 | i->t.host_attrs.ac.match = sas_host_match; | |
1321 | transport_container_register(&i->t.host_attrs); | |
1322 | i->t.host_size = sizeof(struct sas_host_attrs); | |
1323 | ||
1324 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
1325 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
1326 | i->phy_attr_cont.ac.match = sas_phy_match; | |
1327 | transport_container_register(&i->phy_attr_cont); | |
1328 | ||
65c92b09 JB |
1329 | i->port_attr_cont.ac.class = &sas_port_class.class; |
1330 | i->port_attr_cont.ac.attrs = &i->port_attrs[0]; | |
1331 | i->port_attr_cont.ac.match = sas_port_match; | |
1332 | transport_container_register(&i->port_attr_cont); | |
1333 | ||
c7ebbbce CH |
1334 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; |
1335 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
1336 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
1337 | transport_container_register(&i->rphy_attr_cont); | |
1338 | ||
42ab0360 JB |
1339 | i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class; |
1340 | i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0]; | |
1341 | i->end_dev_attr_cont.ac.match = sas_end_dev_match; | |
1342 | transport_container_register(&i->end_dev_attr_cont); | |
1343 | ||
79cb1819 JB |
1344 | i->expander_attr_cont.ac.class = &sas_expander_class.class; |
1345 | i->expander_attr_cont.ac.attrs = &i->expander_attrs[0]; | |
1346 | i->expander_attr_cont.ac.match = sas_expander_match; | |
1347 | transport_container_register(&i->expander_attr_cont); | |
1348 | ||
c7ebbbce CH |
1349 | i->f = ft; |
1350 | ||
1351 | count = 0; | |
65c92b09 | 1352 | SETUP_PORT_ATTRIBUTE(num_phys); |
c7ebbbce CH |
1353 | i->host_attrs[count] = NULL; |
1354 | ||
1355 | count = 0; | |
65c92b09 JB |
1356 | SETUP_PHY_ATTRIBUTE(initiator_port_protocols); |
1357 | SETUP_PHY_ATTRIBUTE(target_port_protocols); | |
1358 | SETUP_PHY_ATTRIBUTE(device_type); | |
1359 | SETUP_PHY_ATTRIBUTE(sas_address); | |
1360 | SETUP_PHY_ATTRIBUTE(phy_identifier); | |
1361 | //SETUP_PHY_ATTRIBUTE(port_identifier); | |
1362 | SETUP_PHY_ATTRIBUTE(negotiated_linkrate); | |
1363 | SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw); | |
1364 | SETUP_PHY_ATTRIBUTE(minimum_linkrate); | |
1365 | SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw); | |
1366 | SETUP_PHY_ATTRIBUTE(maximum_linkrate); | |
1367 | ||
1368 | SETUP_PHY_ATTRIBUTE(invalid_dword_count); | |
1369 | SETUP_PHY_ATTRIBUTE(running_disparity_error_count); | |
1370 | SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count); | |
1371 | SETUP_PHY_ATTRIBUTE(phy_reset_problem_count); | |
1372 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset); | |
1373 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset); | |
c7ebbbce CH |
1374 | i->phy_attrs[count] = NULL; |
1375 | ||
65c92b09 JB |
1376 | count = 0; |
1377 | SETUP_PORT_ATTRIBUTE(num_phys); | |
1378 | i->port_attrs[count] = NULL; | |
1379 | ||
c7ebbbce CH |
1380 | count = 0; |
1381 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
1382 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
1383 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
1384 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
1385 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
dd9fbb52 JB |
1386 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier, |
1387 | get_enclosure_identifier); | |
1388 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier, | |
1389 | get_bay_identifier); | |
c7ebbbce CH |
1390 | i->rphy_attrs[count] = NULL; |
1391 | ||
42ab0360 JB |
1392 | count = 0; |
1393 | SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning); | |
1394 | SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout); | |
1395 | SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout); | |
1396 | i->end_dev_attrs[count] = NULL; | |
1397 | ||
79cb1819 JB |
1398 | count = 0; |
1399 | SETUP_EXPANDER_ATTRIBUTE(vendor_id); | |
1400 | SETUP_EXPANDER_ATTRIBUTE(product_id); | |
1401 | SETUP_EXPANDER_ATTRIBUTE(product_rev); | |
1402 | SETUP_EXPANDER_ATTRIBUTE(component_vendor_id); | |
1403 | SETUP_EXPANDER_ATTRIBUTE(component_id); | |
1404 | SETUP_EXPANDER_ATTRIBUTE(component_revision_id); | |
1405 | SETUP_EXPANDER_ATTRIBUTE(level); | |
1406 | i->expander_attrs[count] = NULL; | |
1407 | ||
c7ebbbce CH |
1408 | return &i->t; |
1409 | } | |
1410 | EXPORT_SYMBOL(sas_attach_transport); | |
1411 | ||
1412 | /** | |
1413 | * sas_release_transport -- release SAS transport template instance | |
1414 | * @t: transport template instance | |
1415 | */ | |
1416 | void sas_release_transport(struct scsi_transport_template *t) | |
1417 | { | |
1418 | struct sas_internal *i = to_sas_internal(t); | |
1419 | ||
1420 | transport_container_unregister(&i->t.host_attrs); | |
1421 | transport_container_unregister(&i->phy_attr_cont); | |
65c92b09 | 1422 | transport_container_unregister(&i->port_attr_cont); |
c7ebbbce | 1423 | transport_container_unregister(&i->rphy_attr_cont); |
db82f841 | 1424 | transport_container_unregister(&i->end_dev_attr_cont); |
79cb1819 | 1425 | transport_container_unregister(&i->expander_attr_cont); |
c7ebbbce CH |
1426 | |
1427 | kfree(i); | |
1428 | } | |
1429 | EXPORT_SYMBOL(sas_release_transport); | |
1430 | ||
1431 | static __init int sas_transport_init(void) | |
1432 | { | |
1433 | int error; | |
1434 | ||
1435 | error = transport_class_register(&sas_host_class); | |
1436 | if (error) | |
1437 | goto out; | |
1438 | error = transport_class_register(&sas_phy_class); | |
1439 | if (error) | |
1440 | goto out_unregister_transport; | |
65c92b09 | 1441 | error = transport_class_register(&sas_port_class); |
c7ebbbce CH |
1442 | if (error) |
1443 | goto out_unregister_phy; | |
65c92b09 JB |
1444 | error = transport_class_register(&sas_rphy_class); |
1445 | if (error) | |
1446 | goto out_unregister_port; | |
42ab0360 JB |
1447 | error = transport_class_register(&sas_end_dev_class); |
1448 | if (error) | |
1449 | goto out_unregister_rphy; | |
79cb1819 JB |
1450 | error = transport_class_register(&sas_expander_class); |
1451 | if (error) | |
1452 | goto out_unregister_end_dev; | |
c7ebbbce CH |
1453 | |
1454 | return 0; | |
1455 | ||
79cb1819 JB |
1456 | out_unregister_end_dev: |
1457 | transport_class_unregister(&sas_end_dev_class); | |
42ab0360 JB |
1458 | out_unregister_rphy: |
1459 | transport_class_unregister(&sas_rphy_class); | |
65c92b09 JB |
1460 | out_unregister_port: |
1461 | transport_class_unregister(&sas_port_class); | |
c7ebbbce CH |
1462 | out_unregister_phy: |
1463 | transport_class_unregister(&sas_phy_class); | |
1464 | out_unregister_transport: | |
1465 | transport_class_unregister(&sas_host_class); | |
1466 | out: | |
1467 | return error; | |
1468 | ||
1469 | } | |
1470 | ||
1471 | static void __exit sas_transport_exit(void) | |
1472 | { | |
1473 | transport_class_unregister(&sas_host_class); | |
1474 | transport_class_unregister(&sas_phy_class); | |
65c92b09 | 1475 | transport_class_unregister(&sas_port_class); |
c7ebbbce | 1476 | transport_class_unregister(&sas_rphy_class); |
42ab0360 | 1477 | transport_class_unregister(&sas_end_dev_class); |
79cb1819 | 1478 | transport_class_unregister(&sas_expander_class); |
c7ebbbce CH |
1479 | } |
1480 | ||
1481 | MODULE_AUTHOR("Christoph Hellwig"); | |
1482 | MODULE_DESCRIPTION("SAS Transphy Attributes"); | |
1483 | MODULE_LICENSE("GPL"); | |
1484 | ||
1485 | module_init(sas_transport_init); | |
1486 | module_exit(sas_transport_exit); |