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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 CH |
31 | |
32 | #include <scsi/scsi_device.h> | |
33 | #include <scsi/scsi_host.h> | |
34 | #include <scsi/scsi_transport.h> | |
35 | #include <scsi/scsi_transport_sas.h> | |
36 | ||
37 | ||
38 | #define SAS_HOST_ATTRS 0 | |
07ba3a95 | 39 | #define SAS_PORT_ATTRS 17 |
c7ebbbce CH |
40 | #define SAS_RPORT_ATTRS 5 |
41 | ||
42 | struct sas_internal { | |
43 | struct scsi_transport_template t; | |
44 | struct sas_function_template *f; | |
45 | ||
46 | struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS]; | |
47 | struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS]; | |
48 | struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS]; | |
49 | ||
50 | struct transport_container phy_attr_cont; | |
51 | struct transport_container rphy_attr_cont; | |
52 | ||
53 | /* | |
54 | * The array of null terminated pointers to attributes | |
55 | * needed by scsi_sysfs.c | |
56 | */ | |
57 | struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1]; | |
58 | struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1]; | |
59 | struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1]; | |
60 | }; | |
61 | #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t) | |
62 | ||
63 | struct sas_host_attrs { | |
64 | struct list_head rphy_list; | |
65 | spinlock_t lock; | |
66 | u32 next_target_id; | |
67 | }; | |
68 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) | |
69 | ||
70 | ||
71 | /* | |
72 | * Hack to allow attributes of the same name in different objects. | |
73 | */ | |
74 | #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
75 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
76 | __ATTR(_name,_mode,_show,_store) | |
77 | ||
78 | ||
79 | /* | |
80 | * Pretty printing helpers | |
81 | */ | |
82 | ||
83 | #define sas_bitfield_name_match(title, table) \ | |
84 | static ssize_t \ | |
85 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
86 | { \ | |
87 | char *prefix = ""; \ | |
88 | ssize_t len = 0; \ | |
89 | int i; \ | |
90 | \ | |
91 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
92 | if (table[i].value & table_key) { \ | |
93 | len += sprintf(buf + len, "%s%s", \ | |
94 | prefix, table[i].name); \ | |
95 | prefix = ", "; \ | |
96 | } \ | |
97 | } \ | |
98 | len += sprintf(buf + len, "\n"); \ | |
99 | return len; \ | |
100 | } | |
101 | ||
102 | #define sas_bitfield_name_search(title, table) \ | |
103 | static ssize_t \ | |
104 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
105 | { \ | |
106 | ssize_t len = 0; \ | |
107 | int i; \ | |
108 | \ | |
109 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
110 | if (table[i].value == table_key) { \ | |
111 | len += sprintf(buf + len, "%s", \ | |
112 | table[i].name); \ | |
113 | break; \ | |
114 | } \ | |
115 | } \ | |
116 | len += sprintf(buf + len, "\n"); \ | |
117 | return len; \ | |
118 | } | |
119 | ||
120 | static struct { | |
121 | u32 value; | |
122 | char *name; | |
123 | } sas_device_type_names[] = { | |
124 | { SAS_PHY_UNUSED, "unused" }, | |
125 | { SAS_END_DEVICE, "end device" }, | |
126 | { SAS_EDGE_EXPANDER_DEVICE, "edge expander" }, | |
127 | { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" }, | |
128 | }; | |
129 | sas_bitfield_name_search(device_type, sas_device_type_names) | |
130 | ||
131 | ||
132 | static struct { | |
133 | u32 value; | |
134 | char *name; | |
135 | } sas_protocol_names[] = { | |
136 | { SAS_PROTOCOL_SATA, "sata" }, | |
137 | { SAS_PROTOCOL_SMP, "smp" }, | |
138 | { SAS_PROTOCOL_STP, "stp" }, | |
139 | { SAS_PROTOCOL_SSP, "ssp" }, | |
140 | }; | |
141 | sas_bitfield_name_match(protocol, sas_protocol_names) | |
142 | ||
143 | static struct { | |
144 | u32 value; | |
145 | char *name; | |
146 | } sas_linkspeed_names[] = { | |
147 | { SAS_LINK_RATE_UNKNOWN, "Unknown" }, | |
148 | { SAS_PHY_DISABLED, "Phy disabled" }, | |
149 | { SAS_LINK_RATE_FAILED, "Link Rate failed" }, | |
150 | { SAS_SATA_SPINUP_HOLD, "Spin-up hold" }, | |
151 | { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" }, | |
152 | { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" }, | |
153 | }; | |
154 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) | |
155 | ||
156 | ||
157 | /* | |
158 | * SAS host attributes | |
159 | */ | |
160 | ||
37be6eeb JB |
161 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
162 | struct class_device *cdev) | |
c7ebbbce CH |
163 | { |
164 | struct Scsi_Host *shost = dev_to_shost(dev); | |
165 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
166 | ||
167 | INIT_LIST_HEAD(&sas_host->rphy_list); | |
168 | spin_lock_init(&sas_host->lock); | |
169 | sas_host->next_target_id = 0; | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static DECLARE_TRANSPORT_CLASS(sas_host_class, | |
174 | "sas_host", sas_host_setup, NULL, NULL); | |
175 | ||
176 | static int sas_host_match(struct attribute_container *cont, | |
177 | struct device *dev) | |
178 | { | |
179 | struct Scsi_Host *shost; | |
180 | struct sas_internal *i; | |
181 | ||
182 | if (!scsi_is_host_device(dev)) | |
183 | return 0; | |
184 | shost = dev_to_shost(dev); | |
185 | ||
186 | if (!shost->transportt) | |
187 | return 0; | |
188 | if (shost->transportt->host_attrs.ac.class != | |
189 | &sas_host_class.class) | |
190 | return 0; | |
191 | ||
192 | i = to_sas_internal(shost->transportt); | |
193 | return &i->t.host_attrs.ac == cont; | |
194 | } | |
195 | ||
196 | static int do_sas_phy_delete(struct device *dev, void *data) | |
197 | { | |
198 | if (scsi_is_sas_phy(dev)) | |
199 | sas_phy_delete(dev_to_phy(dev)); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | /** | |
204 | * sas_remove_host -- tear down a Scsi_Host's SAS data structures | |
205 | * @shost: Scsi Host that is torn down | |
206 | * | |
207 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host. | |
208 | * Must be called just before scsi_remove_host for SAS HBAs. | |
209 | */ | |
210 | void sas_remove_host(struct Scsi_Host *shost) | |
211 | { | |
212 | device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete); | |
213 | } | |
214 | EXPORT_SYMBOL(sas_remove_host); | |
215 | ||
216 | ||
217 | /* | |
218 | * SAS Port attributes | |
219 | */ | |
220 | ||
221 | #define sas_phy_show_simple(field, name, format_string, cast) \ | |
222 | static ssize_t \ | |
223 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
224 | { \ | |
225 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
226 | \ | |
227 | return snprintf(buf, 20, format_string, cast phy->field); \ | |
228 | } | |
229 | ||
230 | #define sas_phy_simple_attr(field, name, format_string, type) \ | |
231 | sas_phy_show_simple(field, name, format_string, (type)) \ | |
232 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
233 | ||
234 | #define sas_phy_show_protocol(field, name) \ | |
235 | static ssize_t \ | |
236 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
237 | { \ | |
238 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
239 | \ | |
240 | if (!phy->field) \ | |
241 | return snprintf(buf, 20, "none\n"); \ | |
242 | return get_sas_protocol_names(phy->field, buf); \ | |
243 | } | |
244 | ||
245 | #define sas_phy_protocol_attr(field, name) \ | |
246 | sas_phy_show_protocol(field, name) \ | |
247 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
248 | ||
249 | #define sas_phy_show_linkspeed(field) \ | |
250 | static ssize_t \ | |
251 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
252 | { \ | |
253 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
254 | \ | |
255 | return get_sas_linkspeed_names(phy->field, buf); \ | |
256 | } | |
257 | ||
258 | #define sas_phy_linkspeed_attr(field) \ | |
259 | sas_phy_show_linkspeed(field) \ | |
260 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
261 | ||
c3ee74c4 CH |
262 | #define sas_phy_show_linkerror(field) \ |
263 | static ssize_t \ | |
264 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
265 | { \ | |
266 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
267 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ | |
268 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
269 | int error; \ | |
270 | \ | |
ac01bbbd CH |
271 | if (!phy->local_attached) \ |
272 | return -EINVAL; \ | |
273 | \ | |
c3ee74c4 CH |
274 | error = i->f->get_linkerrors(phy); \ |
275 | if (error) \ | |
276 | return error; \ | |
277 | return snprintf(buf, 20, "%u\n", phy->field); \ | |
278 | } | |
279 | ||
280 | #define sas_phy_linkerror_attr(field) \ | |
281 | sas_phy_show_linkerror(field) \ | |
282 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
283 | ||
284 | ||
c7ebbbce CH |
285 | static ssize_t |
286 | show_sas_device_type(struct class_device *cdev, char *buf) | |
287 | { | |
288 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
289 | ||
290 | if (!phy->identify.device_type) | |
291 | return snprintf(buf, 20, "none\n"); | |
292 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
293 | } | |
c7ebbbce CH |
294 | static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
295 | ||
07ba3a95 CH |
296 | static ssize_t do_sas_phy_reset(struct class_device *cdev, |
297 | size_t count, int hard_reset) | |
298 | { | |
299 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
300 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
301 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
302 | int error; | |
303 | ||
304 | if (!phy->local_attached) | |
305 | return -EINVAL; | |
306 | ||
307 | error = i->f->phy_reset(phy, hard_reset); | |
308 | if (error) | |
309 | return error; | |
310 | return count; | |
311 | }; | |
312 | ||
313 | static ssize_t store_sas_link_reset(struct class_device *cdev, | |
314 | const char *buf, size_t count) | |
315 | { | |
316 | return do_sas_phy_reset(cdev, count, 0); | |
317 | } | |
318 | static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); | |
319 | ||
320 | static ssize_t store_sas_hard_reset(struct class_device *cdev, | |
321 | const char *buf, size_t count) | |
322 | { | |
323 | return do_sas_phy_reset(cdev, count, 1); | |
324 | } | |
325 | static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); | |
326 | ||
c7ebbbce CH |
327 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
328 | initiator_port_protocols); | |
329 | sas_phy_protocol_attr(identify.target_port_protocols, | |
330 | target_port_protocols); | |
331 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
332 | unsigned long long); | |
333 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
334 | sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8); | |
335 | sas_phy_linkspeed_attr(negotiated_linkrate); | |
336 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
337 | sas_phy_linkspeed_attr(minimum_linkrate); | |
338 | sas_phy_linkspeed_attr(maximum_linkrate_hw); | |
339 | sas_phy_linkspeed_attr(maximum_linkrate); | |
c3ee74c4 CH |
340 | sas_phy_linkerror_attr(invalid_dword_count); |
341 | sas_phy_linkerror_attr(running_disparity_error_count); | |
342 | sas_phy_linkerror_attr(loss_of_dword_sync_count); | |
343 | sas_phy_linkerror_attr(phy_reset_problem_count); | |
c7ebbbce CH |
344 | |
345 | ||
346 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
347 | "sas_phy", NULL, NULL, NULL); | |
348 | ||
349 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
350 | { | |
351 | struct Scsi_Host *shost; | |
352 | struct sas_internal *i; | |
353 | ||
354 | if (!scsi_is_sas_phy(dev)) | |
355 | return 0; | |
356 | shost = dev_to_shost(dev->parent); | |
357 | ||
358 | if (!shost->transportt) | |
359 | return 0; | |
360 | if (shost->transportt->host_attrs.ac.class != | |
361 | &sas_host_class.class) | |
362 | return 0; | |
363 | ||
364 | i = to_sas_internal(shost->transportt); | |
365 | return &i->phy_attr_cont.ac == cont; | |
366 | } | |
367 | ||
368 | static void sas_phy_release(struct device *dev) | |
369 | { | |
370 | struct sas_phy *phy = dev_to_phy(dev); | |
371 | ||
372 | put_device(dev->parent); | |
373 | kfree(phy); | |
374 | } | |
375 | ||
376 | /** | |
377 | * sas_phy_alloc -- allocates and initialize a SAS PHY structure | |
378 | * @parent: Parent device | |
379 | * @number: Port number | |
380 | * | |
381 | * Allocates an SAS PHY structure. It will be added in the device tree | |
382 | * below the device specified by @parent, which has to be either a Scsi_Host | |
383 | * or sas_rphy. | |
384 | * | |
385 | * Returns: | |
386 | * SAS PHY allocated or %NULL if the allocation failed. | |
387 | */ | |
388 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
389 | { | |
390 | struct Scsi_Host *shost = dev_to_shost(parent); | |
391 | struct sas_phy *phy; | |
392 | ||
393 | phy = kmalloc(sizeof(*phy), GFP_KERNEL); | |
394 | if (!phy) | |
395 | return NULL; | |
396 | memset(phy, 0, sizeof(*phy)); | |
397 | ||
398 | get_device(parent); | |
399 | ||
400 | phy->number = number; | |
401 | ||
402 | device_initialize(&phy->dev); | |
403 | phy->dev.parent = get_device(parent); | |
404 | phy->dev.release = sas_phy_release; | |
405 | sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); | |
406 | ||
407 | transport_setup_device(&phy->dev); | |
408 | ||
409 | return phy; | |
410 | } | |
411 | EXPORT_SYMBOL(sas_phy_alloc); | |
412 | ||
413 | /** | |
414 | * sas_phy_add -- add a SAS PHY to the device hierachy | |
415 | * @phy: The PHY to be added | |
416 | * | |
417 | * Publishes a SAS PHY to the rest of the system. | |
418 | */ | |
419 | int sas_phy_add(struct sas_phy *phy) | |
420 | { | |
421 | int error; | |
422 | ||
423 | error = device_add(&phy->dev); | |
424 | if (!error) { | |
425 | transport_add_device(&phy->dev); | |
426 | transport_configure_device(&phy->dev); | |
427 | } | |
428 | ||
429 | return error; | |
430 | } | |
431 | EXPORT_SYMBOL(sas_phy_add); | |
432 | ||
433 | /** | |
434 | * sas_phy_free -- free a SAS PHY | |
435 | * @phy: SAS PHY to free | |
436 | * | |
437 | * Frees the specified SAS PHY. | |
438 | * | |
439 | * Note: | |
440 | * This function must only be called on a PHY that has not | |
441 | * sucessfully been added using sas_phy_add(). | |
442 | */ | |
443 | void sas_phy_free(struct sas_phy *phy) | |
444 | { | |
445 | transport_destroy_device(&phy->dev); | |
446 | put_device(phy->dev.parent); | |
447 | put_device(phy->dev.parent); | |
448 | put_device(phy->dev.parent); | |
449 | kfree(phy); | |
450 | } | |
451 | EXPORT_SYMBOL(sas_phy_free); | |
452 | ||
453 | /** | |
454 | * sas_phy_delete -- remove SAS PHY | |
455 | * @phy: SAS PHY to remove | |
456 | * | |
457 | * Removes the specified SAS PHY. If the SAS PHY has an | |
458 | * associated remote PHY it is removed before. | |
459 | */ | |
460 | void | |
461 | sas_phy_delete(struct sas_phy *phy) | |
462 | { | |
463 | struct device *dev = &phy->dev; | |
464 | ||
465 | if (phy->rphy) | |
466 | sas_rphy_delete(phy->rphy); | |
467 | ||
468 | transport_remove_device(dev); | |
469 | device_del(dev); | |
470 | transport_destroy_device(dev); | |
471 | put_device(dev->parent); | |
472 | } | |
473 | EXPORT_SYMBOL(sas_phy_delete); | |
474 | ||
475 | /** | |
476 | * scsi_is_sas_phy -- check if a struct device represents a SAS PHY | |
477 | * @dev: device to check | |
478 | * | |
479 | * Returns: | |
480 | * %1 if the device represents a SAS PHY, %0 else | |
481 | */ | |
482 | int scsi_is_sas_phy(const struct device *dev) | |
483 | { | |
484 | return dev->release == sas_phy_release; | |
485 | } | |
486 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
487 | ||
488 | /* | |
489 | * SAS remote PHY attributes. | |
490 | */ | |
491 | ||
492 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
493 | static ssize_t \ | |
494 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
495 | { \ | |
496 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
497 | \ | |
498 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
499 | } | |
500 | ||
501 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
502 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
503 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
504 | show_sas_rphy_##name, NULL) | |
505 | ||
506 | #define sas_rphy_show_protocol(field, name) \ | |
507 | static ssize_t \ | |
508 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
509 | { \ | |
510 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
511 | \ | |
512 | if (!rphy->field) \ | |
513 | return snprintf(buf, 20, "none\n"); \ | |
514 | return get_sas_protocol_names(rphy->field, buf); \ | |
515 | } | |
516 | ||
517 | #define sas_rphy_protocol_attr(field, name) \ | |
518 | sas_rphy_show_protocol(field, name) \ | |
519 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
520 | show_sas_rphy_##name, NULL) | |
521 | ||
522 | static ssize_t | |
523 | show_sas_rphy_device_type(struct class_device *cdev, char *buf) | |
524 | { | |
525 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
526 | ||
527 | if (!rphy->identify.device_type) | |
528 | return snprintf(buf, 20, "none\n"); | |
529 | return get_sas_device_type_names( | |
530 | rphy->identify.device_type, buf); | |
531 | } | |
532 | ||
533 | static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO, | |
534 | show_sas_rphy_device_type, NULL); | |
535 | ||
536 | sas_rphy_protocol_attr(identify.initiator_port_protocols, | |
537 | initiator_port_protocols); | |
538 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
539 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
540 | unsigned long long); | |
541 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
542 | ||
543 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, | |
544 | "sas_rphy", NULL, NULL, NULL); | |
545 | ||
546 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
547 | { | |
548 | struct Scsi_Host *shost; | |
549 | struct sas_internal *i; | |
550 | ||
551 | if (!scsi_is_sas_rphy(dev)) | |
552 | return 0; | |
553 | shost = dev_to_shost(dev->parent->parent); | |
554 | ||
555 | if (!shost->transportt) | |
556 | return 0; | |
557 | if (shost->transportt->host_attrs.ac.class != | |
558 | &sas_host_class.class) | |
559 | return 0; | |
560 | ||
561 | i = to_sas_internal(shost->transportt); | |
562 | return &i->rphy_attr_cont.ac == cont; | |
563 | } | |
564 | ||
565 | static void sas_rphy_release(struct device *dev) | |
566 | { | |
567 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
568 | ||
569 | put_device(dev->parent); | |
570 | kfree(rphy); | |
571 | } | |
572 | ||
573 | /** | |
574 | * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure | |
575 | * @parent: SAS PHY this remote PHY is conneted to | |
576 | * | |
577 | * Allocates an SAS remote PHY structure, connected to @parent. | |
578 | * | |
579 | * Returns: | |
580 | * SAS PHY allocated or %NULL if the allocation failed. | |
581 | */ | |
582 | struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent) | |
583 | { | |
584 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
585 | struct sas_rphy *rphy; | |
586 | ||
587 | rphy = kmalloc(sizeof(*rphy), GFP_KERNEL); | |
588 | if (!rphy) { | |
589 | put_device(&parent->dev); | |
590 | return NULL; | |
591 | } | |
592 | memset(rphy, 0, sizeof(*rphy)); | |
593 | ||
594 | device_initialize(&rphy->dev); | |
595 | rphy->dev.parent = get_device(&parent->dev); | |
596 | rphy->dev.release = sas_rphy_release; | |
597 | sprintf(rphy->dev.bus_id, "rphy-%d:%d", | |
598 | shost->host_no, parent->number); | |
599 | transport_setup_device(&rphy->dev); | |
600 | ||
601 | return rphy; | |
602 | } | |
603 | EXPORT_SYMBOL(sas_rphy_alloc); | |
604 | ||
605 | /** | |
606 | * sas_rphy_add -- add a SAS remote PHY to the device hierachy | |
607 | * @rphy: The remote PHY to be added | |
608 | * | |
609 | * Publishes a SAS remote PHY to the rest of the system. | |
610 | */ | |
611 | int sas_rphy_add(struct sas_rphy *rphy) | |
612 | { | |
613 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
614 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
615 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
616 | struct sas_identify *identify = &rphy->identify; | |
617 | int error; | |
618 | ||
619 | if (parent->rphy) | |
620 | return -ENXIO; | |
621 | parent->rphy = rphy; | |
622 | ||
623 | error = device_add(&rphy->dev); | |
624 | if (error) | |
625 | return error; | |
626 | transport_add_device(&rphy->dev); | |
627 | transport_configure_device(&rphy->dev); | |
628 | ||
629 | spin_lock(&sas_host->lock); | |
630 | list_add_tail(&rphy->list, &sas_host->rphy_list); | |
631 | if (identify->device_type == SAS_END_DEVICE && | |
632 | (identify->target_port_protocols & | |
633 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
634 | rphy->scsi_target_id = sas_host->next_target_id++; | |
635 | else | |
636 | rphy->scsi_target_id = -1; | |
637 | spin_unlock(&sas_host->lock); | |
638 | ||
639 | if (rphy->scsi_target_id != -1) { | |
640 | scsi_scan_target(&rphy->dev, parent->number, | |
641 | rphy->scsi_target_id, ~0, 0); | |
642 | } | |
643 | ||
644 | return 0; | |
645 | } | |
646 | EXPORT_SYMBOL(sas_rphy_add); | |
647 | ||
648 | /** | |
649 | * sas_rphy_free -- free a SAS remote PHY | |
650 | * @rphy SAS remote PHY to free | |
651 | * | |
652 | * Frees the specified SAS remote PHY. | |
653 | * | |
654 | * Note: | |
655 | * This function must only be called on a remote | |
656 | * PHY that has not sucessfully been added using | |
657 | * sas_rphy_add(). | |
658 | */ | |
659 | void sas_rphy_free(struct sas_rphy *rphy) | |
660 | { | |
661 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); | |
662 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
663 | ||
664 | spin_lock(&sas_host->lock); | |
665 | list_del(&rphy->list); | |
666 | spin_unlock(&sas_host->lock); | |
667 | ||
668 | transport_destroy_device(&rphy->dev); | |
669 | put_device(rphy->dev.parent); | |
670 | put_device(rphy->dev.parent); | |
671 | put_device(rphy->dev.parent); | |
672 | kfree(rphy); | |
673 | } | |
674 | EXPORT_SYMBOL(sas_rphy_free); | |
675 | ||
676 | /** | |
677 | * sas_rphy_delete -- remove SAS remote PHY | |
678 | * @rphy: SAS remote PHY to remove | |
679 | * | |
680 | * Removes the specified SAS remote PHY. | |
681 | */ | |
682 | void | |
683 | sas_rphy_delete(struct sas_rphy *rphy) | |
684 | { | |
685 | struct device *dev = &rphy->dev; | |
686 | struct sas_phy *parent = dev_to_phy(dev->parent); | |
687 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
688 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
689 | ||
d4054239 CH |
690 | switch (rphy->identify.device_type) { |
691 | case SAS_END_DEVICE: | |
692 | scsi_remove_target(dev); | |
693 | break; | |
694 | case SAS_EDGE_EXPANDER_DEVICE: | |
695 | case SAS_FANOUT_EXPANDER_DEVICE: | |
696 | device_for_each_child(dev, NULL, do_sas_phy_delete); | |
697 | break; | |
698 | default: | |
699 | break; | |
700 | } | |
c7ebbbce | 701 | |
fe8b2304 CH |
702 | transport_remove_device(dev); |
703 | device_del(dev); | |
704 | transport_destroy_device(dev); | |
c7ebbbce CH |
705 | |
706 | spin_lock(&sas_host->lock); | |
707 | list_del(&rphy->list); | |
708 | spin_unlock(&sas_host->lock); | |
709 | ||
33b114e9 CH |
710 | parent->rphy = NULL; |
711 | ||
c7ebbbce CH |
712 | put_device(&parent->dev); |
713 | } | |
714 | EXPORT_SYMBOL(sas_rphy_delete); | |
715 | ||
716 | /** | |
717 | * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY | |
718 | * @dev: device to check | |
719 | * | |
720 | * Returns: | |
721 | * %1 if the device represents a SAS remote PHY, %0 else | |
722 | */ | |
723 | int scsi_is_sas_rphy(const struct device *dev) | |
724 | { | |
725 | return dev->release == sas_rphy_release; | |
726 | } | |
727 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
728 | ||
729 | ||
730 | /* | |
731 | * SCSI scan helper | |
732 | */ | |
733 | ||
734 | static struct device *sas_target_parent(struct Scsi_Host *shost, | |
735 | int channel, uint id) | |
736 | { | |
737 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
738 | struct sas_rphy *rphy; | |
739 | struct device *dev = NULL; | |
740 | ||
741 | spin_lock(&sas_host->lock); | |
742 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { | |
743 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
744 | if (parent->number == channel && | |
745 | rphy->scsi_target_id == id) | |
746 | dev = &rphy->dev; | |
747 | } | |
748 | spin_unlock(&sas_host->lock); | |
749 | ||
750 | return dev; | |
751 | } | |
752 | ||
753 | ||
754 | /* | |
755 | * Setup / Teardown code | |
756 | */ | |
757 | ||
758 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
759 | i->private_rphy_attrs[count] = class_device_attr_##field; \ | |
760 | i->private_rphy_attrs[count].attr.mode = S_IRUGO; \ | |
761 | i->private_rphy_attrs[count].store = NULL; \ | |
762 | i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \ | |
763 | count++ | |
764 | ||
765 | #define SETUP_PORT_ATTRIBUTE(field) \ | |
766 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
767 | i->private_phy_attrs[count].attr.mode = S_IRUGO; \ | |
768 | i->private_phy_attrs[count].store = NULL; \ | |
769 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
770 | count++ | |
771 | ||
07ba3a95 CH |
772 | #define SETUP_PORT_ATTRIBUTE_WRONLY(field) \ |
773 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
774 | i->private_phy_attrs[count].attr.mode = S_IWUGO; \ | |
775 | i->private_phy_attrs[count].show = NULL; \ | |
776 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
777 | count++ | |
778 | ||
c7ebbbce CH |
779 | |
780 | /** | |
781 | * sas_attach_transport -- instantiate SAS transport template | |
782 | * @ft: SAS transport class function template | |
783 | */ | |
784 | struct scsi_transport_template * | |
785 | sas_attach_transport(struct sas_function_template *ft) | |
786 | { | |
787 | struct sas_internal *i; | |
788 | int count; | |
789 | ||
790 | i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL); | |
791 | if (!i) | |
792 | return NULL; | |
793 | memset(i, 0, sizeof(struct sas_internal)); | |
794 | ||
795 | i->t.target_parent = sas_target_parent; | |
796 | ||
797 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
798 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
799 | i->t.host_attrs.ac.match = sas_host_match; | |
800 | transport_container_register(&i->t.host_attrs); | |
801 | i->t.host_size = sizeof(struct sas_host_attrs); | |
802 | ||
803 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
804 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
805 | i->phy_attr_cont.ac.match = sas_phy_match; | |
806 | transport_container_register(&i->phy_attr_cont); | |
807 | ||
808 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; | |
809 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
810 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
811 | transport_container_register(&i->rphy_attr_cont); | |
812 | ||
813 | i->f = ft; | |
814 | ||
815 | count = 0; | |
816 | i->host_attrs[count] = NULL; | |
817 | ||
818 | count = 0; | |
819 | SETUP_PORT_ATTRIBUTE(initiator_port_protocols); | |
820 | SETUP_PORT_ATTRIBUTE(target_port_protocols); | |
821 | SETUP_PORT_ATTRIBUTE(device_type); | |
822 | SETUP_PORT_ATTRIBUTE(sas_address); | |
823 | SETUP_PORT_ATTRIBUTE(phy_identifier); | |
824 | SETUP_PORT_ATTRIBUTE(port_identifier); | |
825 | SETUP_PORT_ATTRIBUTE(negotiated_linkrate); | |
826 | SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw); | |
827 | SETUP_PORT_ATTRIBUTE(minimum_linkrate); | |
828 | SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw); | |
829 | SETUP_PORT_ATTRIBUTE(maximum_linkrate); | |
c3ee74c4 CH |
830 | |
831 | SETUP_PORT_ATTRIBUTE(invalid_dword_count); | |
832 | SETUP_PORT_ATTRIBUTE(running_disparity_error_count); | |
833 | SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count); | |
834 | SETUP_PORT_ATTRIBUTE(phy_reset_problem_count); | |
07ba3a95 CH |
835 | SETUP_PORT_ATTRIBUTE_WRONLY(link_reset); |
836 | SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset); | |
c7ebbbce CH |
837 | i->phy_attrs[count] = NULL; |
838 | ||
839 | count = 0; | |
840 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
841 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
842 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
843 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
844 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
845 | i->rphy_attrs[count] = NULL; | |
846 | ||
847 | return &i->t; | |
848 | } | |
849 | EXPORT_SYMBOL(sas_attach_transport); | |
850 | ||
851 | /** | |
852 | * sas_release_transport -- release SAS transport template instance | |
853 | * @t: transport template instance | |
854 | */ | |
855 | void sas_release_transport(struct scsi_transport_template *t) | |
856 | { | |
857 | struct sas_internal *i = to_sas_internal(t); | |
858 | ||
859 | transport_container_unregister(&i->t.host_attrs); | |
860 | transport_container_unregister(&i->phy_attr_cont); | |
861 | transport_container_unregister(&i->rphy_attr_cont); | |
862 | ||
863 | kfree(i); | |
864 | } | |
865 | EXPORT_SYMBOL(sas_release_transport); | |
866 | ||
867 | static __init int sas_transport_init(void) | |
868 | { | |
869 | int error; | |
870 | ||
871 | error = transport_class_register(&sas_host_class); | |
872 | if (error) | |
873 | goto out; | |
874 | error = transport_class_register(&sas_phy_class); | |
875 | if (error) | |
876 | goto out_unregister_transport; | |
877 | error = transport_class_register(&sas_rphy_class); | |
878 | if (error) | |
879 | goto out_unregister_phy; | |
880 | ||
881 | return 0; | |
882 | ||
883 | out_unregister_phy: | |
884 | transport_class_unregister(&sas_phy_class); | |
885 | out_unregister_transport: | |
886 | transport_class_unregister(&sas_host_class); | |
887 | out: | |
888 | return error; | |
889 | ||
890 | } | |
891 | ||
892 | static void __exit sas_transport_exit(void) | |
893 | { | |
894 | transport_class_unregister(&sas_host_class); | |
895 | transport_class_unregister(&sas_phy_class); | |
896 | transport_class_unregister(&sas_rphy_class); | |
897 | } | |
898 | ||
899 | MODULE_AUTHOR("Christoph Hellwig"); | |
900 | MODULE_DESCRIPTION("SAS Transphy Attributes"); | |
901 | MODULE_LICENSE("GPL"); | |
902 | ||
903 | module_init(sas_transport_init); | |
904 | module_exit(sas_transport_exit); |