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c7ebbbce CH |
1 | /* |
2 | * Copyright (C) 2005 Dell Inc. | |
3 | * Released under GPL v2. | |
4 | * | |
5 | * Serial Attached SCSI (SAS) transport class. | |
6 | * | |
7 | * The SAS transport class contains common code to deal with SAS HBAs, | |
8 | * an aproximated representation of SAS topologies in the driver model, | |
9 | * and various sysfs attributes to expose these topologies and managment | |
10 | * interfaces to userspace. | |
11 | * | |
12 | * In addition to the basic SCSI core objects this transport class | |
13 | * introduces two additional intermediate objects: The SAS PHY | |
14 | * as represented by struct sas_phy defines an "outgoing" PHY on | |
15 | * a SAS HBA or Expander, and the SAS remote PHY represented by | |
16 | * struct sas_rphy defines an "incoming" PHY on a SAS Expander or | |
17 | * end device. Note that this is purely a software concept, the | |
18 | * underlying hardware for a PHY and a remote PHY is the exactly | |
19 | * the same. | |
20 | * | |
21 | * There is no concept of a SAS port in this code, users can see | |
22 | * what PHYs form a wide port based on the port_identifier attribute, | |
23 | * which is the same for all PHYs in a port. | |
24 | */ | |
25 | ||
26 | #include <linux/init.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/err.h> | |
8c65b4a6 TS |
29 | #include <linux/slab.h> |
30 | #include <linux/string.h> | |
c7ebbbce | 31 | |
e02f3f59 | 32 | #include <scsi/scsi.h> |
c7ebbbce CH |
33 | #include <scsi/scsi_device.h> |
34 | #include <scsi/scsi_host.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_sas.h> | |
37 | ||
38 | ||
39 | #define SAS_HOST_ATTRS 0 | |
07ba3a95 | 40 | #define SAS_PORT_ATTRS 17 |
c7ebbbce CH |
41 | #define SAS_RPORT_ATTRS 5 |
42 | ||
43 | struct sas_internal { | |
44 | struct scsi_transport_template t; | |
45 | struct sas_function_template *f; | |
46 | ||
47 | struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS]; | |
48 | struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS]; | |
49 | struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS]; | |
50 | ||
51 | struct transport_container phy_attr_cont; | |
52 | struct transport_container rphy_attr_cont; | |
53 | ||
54 | /* | |
55 | * The array of null terminated pointers to attributes | |
56 | * needed by scsi_sysfs.c | |
57 | */ | |
58 | struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1]; | |
59 | struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1]; | |
60 | struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1]; | |
61 | }; | |
62 | #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t) | |
63 | ||
64 | struct sas_host_attrs { | |
65 | struct list_head rphy_list; | |
e02f3f59 | 66 | struct mutex lock; |
c7ebbbce CH |
67 | u32 next_target_id; |
68 | }; | |
69 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) | |
70 | ||
71 | ||
72 | /* | |
73 | * Hack to allow attributes of the same name in different objects. | |
74 | */ | |
75 | #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
76 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
77 | __ATTR(_name,_mode,_show,_store) | |
78 | ||
79 | ||
80 | /* | |
81 | * Pretty printing helpers | |
82 | */ | |
83 | ||
84 | #define sas_bitfield_name_match(title, table) \ | |
85 | static ssize_t \ | |
86 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
87 | { \ | |
88 | char *prefix = ""; \ | |
89 | ssize_t len = 0; \ | |
90 | int i; \ | |
91 | \ | |
92 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
93 | if (table[i].value & table_key) { \ | |
94 | len += sprintf(buf + len, "%s%s", \ | |
95 | prefix, table[i].name); \ | |
96 | prefix = ", "; \ | |
97 | } \ | |
98 | } \ | |
99 | len += sprintf(buf + len, "\n"); \ | |
100 | return len; \ | |
101 | } | |
102 | ||
103 | #define sas_bitfield_name_search(title, table) \ | |
104 | static ssize_t \ | |
105 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
106 | { \ | |
107 | ssize_t len = 0; \ | |
108 | int i; \ | |
109 | \ | |
110 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
111 | if (table[i].value == table_key) { \ | |
112 | len += sprintf(buf + len, "%s", \ | |
113 | table[i].name); \ | |
114 | break; \ | |
115 | } \ | |
116 | } \ | |
117 | len += sprintf(buf + len, "\n"); \ | |
118 | return len; \ | |
119 | } | |
120 | ||
121 | static struct { | |
122 | u32 value; | |
123 | char *name; | |
124 | } sas_device_type_names[] = { | |
125 | { SAS_PHY_UNUSED, "unused" }, | |
126 | { SAS_END_DEVICE, "end device" }, | |
127 | { SAS_EDGE_EXPANDER_DEVICE, "edge expander" }, | |
128 | { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" }, | |
129 | }; | |
130 | sas_bitfield_name_search(device_type, sas_device_type_names) | |
131 | ||
132 | ||
133 | static struct { | |
134 | u32 value; | |
135 | char *name; | |
136 | } sas_protocol_names[] = { | |
137 | { SAS_PROTOCOL_SATA, "sata" }, | |
138 | { SAS_PROTOCOL_SMP, "smp" }, | |
139 | { SAS_PROTOCOL_STP, "stp" }, | |
140 | { SAS_PROTOCOL_SSP, "ssp" }, | |
141 | }; | |
142 | sas_bitfield_name_match(protocol, sas_protocol_names) | |
143 | ||
144 | static struct { | |
145 | u32 value; | |
146 | char *name; | |
147 | } sas_linkspeed_names[] = { | |
148 | { SAS_LINK_RATE_UNKNOWN, "Unknown" }, | |
149 | { SAS_PHY_DISABLED, "Phy disabled" }, | |
150 | { SAS_LINK_RATE_FAILED, "Link Rate failed" }, | |
151 | { SAS_SATA_SPINUP_HOLD, "Spin-up hold" }, | |
152 | { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" }, | |
153 | { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" }, | |
154 | }; | |
155 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) | |
156 | ||
157 | ||
158 | /* | |
159 | * SAS host attributes | |
160 | */ | |
161 | ||
37be6eeb JB |
162 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
163 | struct class_device *cdev) | |
c7ebbbce CH |
164 | { |
165 | struct Scsi_Host *shost = dev_to_shost(dev); | |
166 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
167 | ||
168 | INIT_LIST_HEAD(&sas_host->rphy_list); | |
e02f3f59 | 169 | mutex_init(&sas_host->lock); |
c7ebbbce CH |
170 | sas_host->next_target_id = 0; |
171 | return 0; | |
172 | } | |
173 | ||
174 | static DECLARE_TRANSPORT_CLASS(sas_host_class, | |
175 | "sas_host", sas_host_setup, NULL, NULL); | |
176 | ||
177 | static int sas_host_match(struct attribute_container *cont, | |
178 | struct device *dev) | |
179 | { | |
180 | struct Scsi_Host *shost; | |
181 | struct sas_internal *i; | |
182 | ||
183 | if (!scsi_is_host_device(dev)) | |
184 | return 0; | |
185 | shost = dev_to_shost(dev); | |
186 | ||
187 | if (!shost->transportt) | |
188 | return 0; | |
189 | if (shost->transportt->host_attrs.ac.class != | |
190 | &sas_host_class.class) | |
191 | return 0; | |
192 | ||
193 | i = to_sas_internal(shost->transportt); | |
194 | return &i->t.host_attrs.ac == cont; | |
195 | } | |
196 | ||
197 | static int do_sas_phy_delete(struct device *dev, void *data) | |
198 | { | |
199 | if (scsi_is_sas_phy(dev)) | |
200 | sas_phy_delete(dev_to_phy(dev)); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | /** | |
205 | * sas_remove_host -- tear down a Scsi_Host's SAS data structures | |
206 | * @shost: Scsi Host that is torn down | |
207 | * | |
208 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host. | |
209 | * Must be called just before scsi_remove_host for SAS HBAs. | |
210 | */ | |
211 | void sas_remove_host(struct Scsi_Host *shost) | |
212 | { | |
213 | device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete); | |
214 | } | |
215 | EXPORT_SYMBOL(sas_remove_host); | |
216 | ||
217 | ||
218 | /* | |
219 | * SAS Port attributes | |
220 | */ | |
221 | ||
222 | #define sas_phy_show_simple(field, name, format_string, cast) \ | |
223 | static ssize_t \ | |
224 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
225 | { \ | |
226 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
227 | \ | |
228 | return snprintf(buf, 20, format_string, cast phy->field); \ | |
229 | } | |
230 | ||
231 | #define sas_phy_simple_attr(field, name, format_string, type) \ | |
232 | sas_phy_show_simple(field, name, format_string, (type)) \ | |
233 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
234 | ||
235 | #define sas_phy_show_protocol(field, name) \ | |
236 | static ssize_t \ | |
237 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
238 | { \ | |
239 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
240 | \ | |
241 | if (!phy->field) \ | |
242 | return snprintf(buf, 20, "none\n"); \ | |
243 | return get_sas_protocol_names(phy->field, buf); \ | |
244 | } | |
245 | ||
246 | #define sas_phy_protocol_attr(field, name) \ | |
247 | sas_phy_show_protocol(field, name) \ | |
248 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
249 | ||
250 | #define sas_phy_show_linkspeed(field) \ | |
251 | static ssize_t \ | |
252 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
253 | { \ | |
254 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
255 | \ | |
256 | return get_sas_linkspeed_names(phy->field, buf); \ | |
257 | } | |
258 | ||
259 | #define sas_phy_linkspeed_attr(field) \ | |
260 | sas_phy_show_linkspeed(field) \ | |
261 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
262 | ||
c3ee74c4 CH |
263 | #define sas_phy_show_linkerror(field) \ |
264 | static ssize_t \ | |
265 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
266 | { \ | |
267 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
268 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ | |
269 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
270 | int error; \ | |
271 | \ | |
ac01bbbd CH |
272 | if (!phy->local_attached) \ |
273 | return -EINVAL; \ | |
274 | \ | |
c3ee74c4 CH |
275 | error = i->f->get_linkerrors(phy); \ |
276 | if (error) \ | |
277 | return error; \ | |
278 | return snprintf(buf, 20, "%u\n", phy->field); \ | |
279 | } | |
280 | ||
281 | #define sas_phy_linkerror_attr(field) \ | |
282 | sas_phy_show_linkerror(field) \ | |
283 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
284 | ||
285 | ||
c7ebbbce CH |
286 | static ssize_t |
287 | show_sas_device_type(struct class_device *cdev, char *buf) | |
288 | { | |
289 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
290 | ||
291 | if (!phy->identify.device_type) | |
292 | return snprintf(buf, 20, "none\n"); | |
293 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
294 | } | |
c7ebbbce CH |
295 | static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
296 | ||
07ba3a95 CH |
297 | static ssize_t do_sas_phy_reset(struct class_device *cdev, |
298 | size_t count, int hard_reset) | |
299 | { | |
300 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
301 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
302 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
303 | int error; | |
304 | ||
305 | if (!phy->local_attached) | |
306 | return -EINVAL; | |
307 | ||
308 | error = i->f->phy_reset(phy, hard_reset); | |
309 | if (error) | |
310 | return error; | |
311 | return count; | |
312 | }; | |
313 | ||
314 | static ssize_t store_sas_link_reset(struct class_device *cdev, | |
315 | const char *buf, size_t count) | |
316 | { | |
317 | return do_sas_phy_reset(cdev, count, 0); | |
318 | } | |
319 | static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); | |
320 | ||
321 | static ssize_t store_sas_hard_reset(struct class_device *cdev, | |
322 | const char *buf, size_t count) | |
323 | { | |
324 | return do_sas_phy_reset(cdev, count, 1); | |
325 | } | |
326 | static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); | |
327 | ||
c7ebbbce CH |
328 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
329 | initiator_port_protocols); | |
330 | sas_phy_protocol_attr(identify.target_port_protocols, | |
331 | target_port_protocols); | |
332 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
333 | unsigned long long); | |
334 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
335 | sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8); | |
336 | sas_phy_linkspeed_attr(negotiated_linkrate); | |
337 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
338 | sas_phy_linkspeed_attr(minimum_linkrate); | |
339 | sas_phy_linkspeed_attr(maximum_linkrate_hw); | |
340 | sas_phy_linkspeed_attr(maximum_linkrate); | |
c3ee74c4 CH |
341 | sas_phy_linkerror_attr(invalid_dword_count); |
342 | sas_phy_linkerror_attr(running_disparity_error_count); | |
343 | sas_phy_linkerror_attr(loss_of_dword_sync_count); | |
344 | sas_phy_linkerror_attr(phy_reset_problem_count); | |
c7ebbbce CH |
345 | |
346 | ||
347 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
348 | "sas_phy", NULL, NULL, NULL); | |
349 | ||
350 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
351 | { | |
352 | struct Scsi_Host *shost; | |
353 | struct sas_internal *i; | |
354 | ||
355 | if (!scsi_is_sas_phy(dev)) | |
356 | return 0; | |
357 | shost = dev_to_shost(dev->parent); | |
358 | ||
359 | if (!shost->transportt) | |
360 | return 0; | |
361 | if (shost->transportt->host_attrs.ac.class != | |
362 | &sas_host_class.class) | |
363 | return 0; | |
364 | ||
365 | i = to_sas_internal(shost->transportt); | |
366 | return &i->phy_attr_cont.ac == cont; | |
367 | } | |
368 | ||
369 | static void sas_phy_release(struct device *dev) | |
370 | { | |
371 | struct sas_phy *phy = dev_to_phy(dev); | |
372 | ||
373 | put_device(dev->parent); | |
374 | kfree(phy); | |
375 | } | |
376 | ||
377 | /** | |
378 | * sas_phy_alloc -- allocates and initialize a SAS PHY structure | |
379 | * @parent: Parent device | |
d99ca418 | 380 | * @number: Phy index |
c7ebbbce CH |
381 | * |
382 | * Allocates an SAS PHY structure. It will be added in the device tree | |
383 | * below the device specified by @parent, which has to be either a Scsi_Host | |
384 | * or sas_rphy. | |
385 | * | |
386 | * Returns: | |
387 | * SAS PHY allocated or %NULL if the allocation failed. | |
388 | */ | |
389 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
390 | { | |
391 | struct Scsi_Host *shost = dev_to_shost(parent); | |
392 | struct sas_phy *phy; | |
393 | ||
394 | phy = kmalloc(sizeof(*phy), GFP_KERNEL); | |
395 | if (!phy) | |
396 | return NULL; | |
397 | memset(phy, 0, sizeof(*phy)); | |
398 | ||
399 | get_device(parent); | |
400 | ||
401 | phy->number = number; | |
402 | ||
403 | device_initialize(&phy->dev); | |
404 | phy->dev.parent = get_device(parent); | |
405 | phy->dev.release = sas_phy_release; | |
406 | sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); | |
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); | |
447 | put_device(phy->dev.parent); | |
448 | put_device(phy->dev.parent); | |
449 | put_device(phy->dev.parent); | |
450 | kfree(phy); | |
451 | } | |
452 | EXPORT_SYMBOL(sas_phy_free); | |
453 | ||
454 | /** | |
455 | * sas_phy_delete -- remove SAS PHY | |
456 | * @phy: SAS PHY to remove | |
457 | * | |
458 | * Removes the specified SAS PHY. If the SAS PHY has an | |
459 | * associated remote PHY it is removed before. | |
460 | */ | |
461 | void | |
462 | sas_phy_delete(struct sas_phy *phy) | |
463 | { | |
464 | struct device *dev = &phy->dev; | |
465 | ||
466 | if (phy->rphy) | |
467 | sas_rphy_delete(phy->rphy); | |
468 | ||
469 | transport_remove_device(dev); | |
470 | device_del(dev); | |
471 | transport_destroy_device(dev); | |
472 | put_device(dev->parent); | |
473 | } | |
474 | EXPORT_SYMBOL(sas_phy_delete); | |
475 | ||
476 | /** | |
477 | * scsi_is_sas_phy -- check if a struct device represents a SAS PHY | |
478 | * @dev: device to check | |
479 | * | |
480 | * Returns: | |
481 | * %1 if the device represents a SAS PHY, %0 else | |
482 | */ | |
483 | int scsi_is_sas_phy(const struct device *dev) | |
484 | { | |
485 | return dev->release == sas_phy_release; | |
486 | } | |
487 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
488 | ||
489 | /* | |
490 | * SAS remote PHY attributes. | |
491 | */ | |
492 | ||
493 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
494 | static ssize_t \ | |
495 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
496 | { \ | |
497 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
498 | \ | |
499 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
500 | } | |
501 | ||
502 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
503 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
504 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
505 | show_sas_rphy_##name, NULL) | |
506 | ||
507 | #define sas_rphy_show_protocol(field, name) \ | |
508 | static ssize_t \ | |
509 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
510 | { \ | |
511 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
512 | \ | |
513 | if (!rphy->field) \ | |
514 | return snprintf(buf, 20, "none\n"); \ | |
515 | return get_sas_protocol_names(rphy->field, buf); \ | |
516 | } | |
517 | ||
518 | #define sas_rphy_protocol_attr(field, name) \ | |
519 | sas_rphy_show_protocol(field, name) \ | |
520 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
521 | show_sas_rphy_##name, NULL) | |
522 | ||
523 | static ssize_t | |
524 | show_sas_rphy_device_type(struct class_device *cdev, char *buf) | |
525 | { | |
526 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
527 | ||
528 | if (!rphy->identify.device_type) | |
529 | return snprintf(buf, 20, "none\n"); | |
530 | return get_sas_device_type_names( | |
531 | rphy->identify.device_type, buf); | |
532 | } | |
533 | ||
534 | static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO, | |
535 | show_sas_rphy_device_type, NULL); | |
536 | ||
537 | sas_rphy_protocol_attr(identify.initiator_port_protocols, | |
538 | initiator_port_protocols); | |
539 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
540 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
541 | unsigned long long); | |
542 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
543 | ||
544 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, | |
545 | "sas_rphy", NULL, NULL, NULL); | |
546 | ||
547 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
548 | { | |
549 | struct Scsi_Host *shost; | |
550 | struct sas_internal *i; | |
551 | ||
552 | if (!scsi_is_sas_rphy(dev)) | |
553 | return 0; | |
554 | shost = dev_to_shost(dev->parent->parent); | |
555 | ||
556 | if (!shost->transportt) | |
557 | return 0; | |
558 | if (shost->transportt->host_attrs.ac.class != | |
559 | &sas_host_class.class) | |
560 | return 0; | |
561 | ||
562 | i = to_sas_internal(shost->transportt); | |
563 | return &i->rphy_attr_cont.ac == cont; | |
564 | } | |
565 | ||
566 | static void sas_rphy_release(struct device *dev) | |
567 | { | |
568 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
569 | ||
570 | put_device(dev->parent); | |
571 | kfree(rphy); | |
572 | } | |
573 | ||
574 | /** | |
575 | * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure | |
576 | * @parent: SAS PHY this remote PHY is conneted to | |
577 | * | |
578 | * Allocates an SAS remote PHY structure, connected to @parent. | |
579 | * | |
580 | * Returns: | |
581 | * SAS PHY allocated or %NULL if the allocation failed. | |
582 | */ | |
583 | struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent) | |
584 | { | |
585 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
586 | struct sas_rphy *rphy; | |
587 | ||
588 | rphy = kmalloc(sizeof(*rphy), GFP_KERNEL); | |
589 | if (!rphy) { | |
590 | put_device(&parent->dev); | |
591 | return NULL; | |
592 | } | |
593 | memset(rphy, 0, sizeof(*rphy)); | |
594 | ||
595 | device_initialize(&rphy->dev); | |
596 | rphy->dev.parent = get_device(&parent->dev); | |
597 | rphy->dev.release = sas_rphy_release; | |
d99ca418 ME |
598 | sprintf(rphy->dev.bus_id, "rphy-%d:%d-%d", |
599 | shost->host_no, parent->port_identifier, parent->number); | |
c7ebbbce CH |
600 | transport_setup_device(&rphy->dev); |
601 | ||
602 | return rphy; | |
603 | } | |
604 | EXPORT_SYMBOL(sas_rphy_alloc); | |
605 | ||
606 | /** | |
607 | * sas_rphy_add -- add a SAS remote PHY to the device hierachy | |
608 | * @rphy: The remote PHY to be added | |
609 | * | |
610 | * Publishes a SAS remote PHY to the rest of the system. | |
611 | */ | |
612 | int sas_rphy_add(struct sas_rphy *rphy) | |
613 | { | |
614 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
615 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
616 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
617 | struct sas_identify *identify = &rphy->identify; | |
618 | int error; | |
619 | ||
620 | if (parent->rphy) | |
621 | return -ENXIO; | |
622 | parent->rphy = rphy; | |
623 | ||
624 | error = device_add(&rphy->dev); | |
625 | if (error) | |
626 | return error; | |
627 | transport_add_device(&rphy->dev); | |
628 | transport_configure_device(&rphy->dev); | |
629 | ||
e02f3f59 | 630 | mutex_lock(&sas_host->lock); |
c7ebbbce CH |
631 | list_add_tail(&rphy->list, &sas_host->rphy_list); |
632 | if (identify->device_type == SAS_END_DEVICE && | |
633 | (identify->target_port_protocols & | |
634 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
635 | rphy->scsi_target_id = sas_host->next_target_id++; | |
636 | else | |
637 | rphy->scsi_target_id = -1; | |
e02f3f59 | 638 | mutex_unlock(&sas_host->lock); |
c7ebbbce CH |
639 | |
640 | if (rphy->scsi_target_id != -1) { | |
e6bc863c | 641 | scsi_scan_target(&rphy->dev, parent->port_identifier, |
c7ebbbce CH |
642 | rphy->scsi_target_id, ~0, 0); |
643 | } | |
644 | ||
645 | return 0; | |
646 | } | |
647 | EXPORT_SYMBOL(sas_rphy_add); | |
648 | ||
649 | /** | |
650 | * sas_rphy_free -- free a SAS remote PHY | |
651 | * @rphy SAS remote PHY to free | |
652 | * | |
653 | * Frees the specified SAS remote PHY. | |
654 | * | |
655 | * Note: | |
656 | * This function must only be called on a remote | |
657 | * PHY that has not sucessfully been added using | |
658 | * sas_rphy_add(). | |
659 | */ | |
660 | void sas_rphy_free(struct sas_rphy *rphy) | |
661 | { | |
662 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); | |
663 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
664 | ||
e02f3f59 | 665 | mutex_lock(&sas_host->lock); |
c7ebbbce | 666 | list_del(&rphy->list); |
e02f3f59 | 667 | mutex_unlock(&sas_host->lock); |
c7ebbbce CH |
668 | |
669 | transport_destroy_device(&rphy->dev); | |
670 | put_device(rphy->dev.parent); | |
671 | put_device(rphy->dev.parent); | |
672 | put_device(rphy->dev.parent); | |
673 | kfree(rphy); | |
674 | } | |
675 | EXPORT_SYMBOL(sas_rphy_free); | |
676 | ||
677 | /** | |
678 | * sas_rphy_delete -- remove SAS remote PHY | |
679 | * @rphy: SAS remote PHY to remove | |
680 | * | |
681 | * Removes the specified SAS remote PHY. | |
682 | */ | |
683 | void | |
684 | sas_rphy_delete(struct sas_rphy *rphy) | |
685 | { | |
686 | struct device *dev = &rphy->dev; | |
687 | struct sas_phy *parent = dev_to_phy(dev->parent); | |
688 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
689 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
690 | ||
d4054239 CH |
691 | switch (rphy->identify.device_type) { |
692 | case SAS_END_DEVICE: | |
693 | scsi_remove_target(dev); | |
694 | break; | |
695 | case SAS_EDGE_EXPANDER_DEVICE: | |
696 | case SAS_FANOUT_EXPANDER_DEVICE: | |
697 | device_for_each_child(dev, NULL, do_sas_phy_delete); | |
698 | break; | |
699 | default: | |
700 | break; | |
701 | } | |
c7ebbbce | 702 | |
fe8b2304 CH |
703 | transport_remove_device(dev); |
704 | device_del(dev); | |
705 | transport_destroy_device(dev); | |
c7ebbbce | 706 | |
e02f3f59 | 707 | mutex_lock(&sas_host->lock); |
c7ebbbce | 708 | list_del(&rphy->list); |
e02f3f59 | 709 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 710 | |
33b114e9 CH |
711 | parent->rphy = NULL; |
712 | ||
c7ebbbce CH |
713 | put_device(&parent->dev); |
714 | } | |
715 | EXPORT_SYMBOL(sas_rphy_delete); | |
716 | ||
717 | /** | |
718 | * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY | |
719 | * @dev: device to check | |
720 | * | |
721 | * Returns: | |
722 | * %1 if the device represents a SAS remote PHY, %0 else | |
723 | */ | |
724 | int scsi_is_sas_rphy(const struct device *dev) | |
725 | { | |
726 | return dev->release == sas_rphy_release; | |
727 | } | |
728 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
729 | ||
730 | ||
731 | /* | |
732 | * SCSI scan helper | |
733 | */ | |
734 | ||
e02f3f59 CH |
735 | static int sas_user_scan(struct Scsi_Host *shost, uint channel, |
736 | uint id, uint lun) | |
c7ebbbce CH |
737 | { |
738 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
739 | struct sas_rphy *rphy; | |
c7ebbbce | 740 | |
e02f3f59 | 741 | mutex_lock(&sas_host->lock); |
c7ebbbce CH |
742 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { |
743 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
e02f3f59 CH |
744 | |
745 | if (rphy->scsi_target_id == -1) | |
746 | continue; | |
747 | ||
e6bc863c | 748 | if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) && |
e02f3f59 | 749 | (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { |
e6bc863c | 750 | scsi_scan_target(&rphy->dev, parent->port_identifier, |
e02f3f59 CH |
751 | rphy->scsi_target_id, lun, 1); |
752 | } | |
c7ebbbce | 753 | } |
e02f3f59 | 754 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 755 | |
e02f3f59 | 756 | return 0; |
c7ebbbce CH |
757 | } |
758 | ||
759 | ||
760 | /* | |
761 | * Setup / Teardown code | |
762 | */ | |
763 | ||
764 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
765 | i->private_rphy_attrs[count] = class_device_attr_##field; \ | |
766 | i->private_rphy_attrs[count].attr.mode = S_IRUGO; \ | |
767 | i->private_rphy_attrs[count].store = NULL; \ | |
768 | i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \ | |
769 | count++ | |
770 | ||
771 | #define SETUP_PORT_ATTRIBUTE(field) \ | |
772 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
773 | i->private_phy_attrs[count].attr.mode = S_IRUGO; \ | |
774 | i->private_phy_attrs[count].store = NULL; \ | |
775 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
776 | count++ | |
777 | ||
07ba3a95 CH |
778 | #define SETUP_PORT_ATTRIBUTE_WRONLY(field) \ |
779 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
780 | i->private_phy_attrs[count].attr.mode = S_IWUGO; \ | |
781 | i->private_phy_attrs[count].show = NULL; \ | |
782 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
783 | count++ | |
784 | ||
c7ebbbce CH |
785 | |
786 | /** | |
787 | * sas_attach_transport -- instantiate SAS transport template | |
788 | * @ft: SAS transport class function template | |
789 | */ | |
790 | struct scsi_transport_template * | |
791 | sas_attach_transport(struct sas_function_template *ft) | |
792 | { | |
793 | struct sas_internal *i; | |
794 | int count; | |
795 | ||
796 | i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL); | |
797 | if (!i) | |
798 | return NULL; | |
799 | memset(i, 0, sizeof(struct sas_internal)); | |
800 | ||
e02f3f59 | 801 | i->t.user_scan = sas_user_scan; |
c7ebbbce CH |
802 | |
803 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
804 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
805 | i->t.host_attrs.ac.match = sas_host_match; | |
806 | transport_container_register(&i->t.host_attrs); | |
807 | i->t.host_size = sizeof(struct sas_host_attrs); | |
808 | ||
809 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
810 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
811 | i->phy_attr_cont.ac.match = sas_phy_match; | |
812 | transport_container_register(&i->phy_attr_cont); | |
813 | ||
814 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; | |
815 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
816 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
817 | transport_container_register(&i->rphy_attr_cont); | |
818 | ||
819 | i->f = ft; | |
820 | ||
821 | count = 0; | |
822 | i->host_attrs[count] = NULL; | |
823 | ||
824 | count = 0; | |
825 | SETUP_PORT_ATTRIBUTE(initiator_port_protocols); | |
826 | SETUP_PORT_ATTRIBUTE(target_port_protocols); | |
827 | SETUP_PORT_ATTRIBUTE(device_type); | |
828 | SETUP_PORT_ATTRIBUTE(sas_address); | |
829 | SETUP_PORT_ATTRIBUTE(phy_identifier); | |
830 | SETUP_PORT_ATTRIBUTE(port_identifier); | |
831 | SETUP_PORT_ATTRIBUTE(negotiated_linkrate); | |
832 | SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw); | |
833 | SETUP_PORT_ATTRIBUTE(minimum_linkrate); | |
834 | SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw); | |
835 | SETUP_PORT_ATTRIBUTE(maximum_linkrate); | |
c3ee74c4 CH |
836 | |
837 | SETUP_PORT_ATTRIBUTE(invalid_dword_count); | |
838 | SETUP_PORT_ATTRIBUTE(running_disparity_error_count); | |
839 | SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count); | |
840 | SETUP_PORT_ATTRIBUTE(phy_reset_problem_count); | |
07ba3a95 CH |
841 | SETUP_PORT_ATTRIBUTE_WRONLY(link_reset); |
842 | SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset); | |
c7ebbbce CH |
843 | i->phy_attrs[count] = NULL; |
844 | ||
845 | count = 0; | |
846 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
847 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
848 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
849 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
850 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
851 | i->rphy_attrs[count] = NULL; | |
852 | ||
853 | return &i->t; | |
854 | } | |
855 | EXPORT_SYMBOL(sas_attach_transport); | |
856 | ||
857 | /** | |
858 | * sas_release_transport -- release SAS transport template instance | |
859 | * @t: transport template instance | |
860 | */ | |
861 | void sas_release_transport(struct scsi_transport_template *t) | |
862 | { | |
863 | struct sas_internal *i = to_sas_internal(t); | |
864 | ||
865 | transport_container_unregister(&i->t.host_attrs); | |
866 | transport_container_unregister(&i->phy_attr_cont); | |
867 | transport_container_unregister(&i->rphy_attr_cont); | |
868 | ||
869 | kfree(i); | |
870 | } | |
871 | EXPORT_SYMBOL(sas_release_transport); | |
872 | ||
873 | static __init int sas_transport_init(void) | |
874 | { | |
875 | int error; | |
876 | ||
877 | error = transport_class_register(&sas_host_class); | |
878 | if (error) | |
879 | goto out; | |
880 | error = transport_class_register(&sas_phy_class); | |
881 | if (error) | |
882 | goto out_unregister_transport; | |
883 | error = transport_class_register(&sas_rphy_class); | |
884 | if (error) | |
885 | goto out_unregister_phy; | |
886 | ||
887 | return 0; | |
888 | ||
889 | out_unregister_phy: | |
890 | transport_class_unregister(&sas_phy_class); | |
891 | out_unregister_transport: | |
892 | transport_class_unregister(&sas_host_class); | |
893 | out: | |
894 | return error; | |
895 | ||
896 | } | |
897 | ||
898 | static void __exit sas_transport_exit(void) | |
899 | { | |
900 | transport_class_unregister(&sas_host_class); | |
901 | transport_class_unregister(&sas_phy_class); | |
902 | transport_class_unregister(&sas_rphy_class); | |
903 | } | |
904 | ||
905 | MODULE_AUTHOR("Christoph Hellwig"); | |
906 | MODULE_DESCRIPTION("SAS Transphy Attributes"); | |
907 | MODULE_LICENSE("GPL"); | |
908 | ||
909 | module_init(sas_transport_init); | |
910 | module_exit(sas_transport_exit); |