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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> | |
29 | ||
30 | #include <scsi/scsi_device.h> | |
31 | #include <scsi/scsi_host.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_sas.h> | |
34 | ||
35 | ||
36 | #define SAS_HOST_ATTRS 0 | |
07ba3a95 | 37 | #define SAS_PORT_ATTRS 17 |
c7ebbbce CH |
38 | #define SAS_RPORT_ATTRS 5 |
39 | ||
40 | struct sas_internal { | |
41 | struct scsi_transport_template t; | |
42 | struct sas_function_template *f; | |
43 | ||
44 | struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS]; | |
45 | struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS]; | |
46 | struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS]; | |
47 | ||
48 | struct transport_container phy_attr_cont; | |
49 | struct transport_container rphy_attr_cont; | |
50 | ||
51 | /* | |
52 | * The array of null terminated pointers to attributes | |
53 | * needed by scsi_sysfs.c | |
54 | */ | |
55 | struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1]; | |
56 | struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1]; | |
57 | struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1]; | |
58 | }; | |
59 | #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t) | |
60 | ||
61 | struct sas_host_attrs { | |
62 | struct list_head rphy_list; | |
63 | spinlock_t lock; | |
64 | u32 next_target_id; | |
65 | }; | |
66 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) | |
67 | ||
68 | ||
69 | /* | |
70 | * Hack to allow attributes of the same name in different objects. | |
71 | */ | |
72 | #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
73 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
74 | __ATTR(_name,_mode,_show,_store) | |
75 | ||
76 | ||
77 | /* | |
78 | * Pretty printing helpers | |
79 | */ | |
80 | ||
81 | #define sas_bitfield_name_match(title, table) \ | |
82 | static ssize_t \ | |
83 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
84 | { \ | |
85 | char *prefix = ""; \ | |
86 | ssize_t len = 0; \ | |
87 | int i; \ | |
88 | \ | |
89 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
90 | if (table[i].value & table_key) { \ | |
91 | len += sprintf(buf + len, "%s%s", \ | |
92 | prefix, table[i].name); \ | |
93 | prefix = ", "; \ | |
94 | } \ | |
95 | } \ | |
96 | len += sprintf(buf + len, "\n"); \ | |
97 | return len; \ | |
98 | } | |
99 | ||
100 | #define sas_bitfield_name_search(title, table) \ | |
101 | static ssize_t \ | |
102 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
103 | { \ | |
104 | ssize_t len = 0; \ | |
105 | int i; \ | |
106 | \ | |
107 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
108 | if (table[i].value == table_key) { \ | |
109 | len += sprintf(buf + len, "%s", \ | |
110 | table[i].name); \ | |
111 | break; \ | |
112 | } \ | |
113 | } \ | |
114 | len += sprintf(buf + len, "\n"); \ | |
115 | return len; \ | |
116 | } | |
117 | ||
118 | static struct { | |
119 | u32 value; | |
120 | char *name; | |
121 | } sas_device_type_names[] = { | |
122 | { SAS_PHY_UNUSED, "unused" }, | |
123 | { SAS_END_DEVICE, "end device" }, | |
124 | { SAS_EDGE_EXPANDER_DEVICE, "edge expander" }, | |
125 | { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" }, | |
126 | }; | |
127 | sas_bitfield_name_search(device_type, sas_device_type_names) | |
128 | ||
129 | ||
130 | static struct { | |
131 | u32 value; | |
132 | char *name; | |
133 | } sas_protocol_names[] = { | |
134 | { SAS_PROTOCOL_SATA, "sata" }, | |
135 | { SAS_PROTOCOL_SMP, "smp" }, | |
136 | { SAS_PROTOCOL_STP, "stp" }, | |
137 | { SAS_PROTOCOL_SSP, "ssp" }, | |
138 | }; | |
139 | sas_bitfield_name_match(protocol, sas_protocol_names) | |
140 | ||
141 | static struct { | |
142 | u32 value; | |
143 | char *name; | |
144 | } sas_linkspeed_names[] = { | |
145 | { SAS_LINK_RATE_UNKNOWN, "Unknown" }, | |
146 | { SAS_PHY_DISABLED, "Phy disabled" }, | |
147 | { SAS_LINK_RATE_FAILED, "Link Rate failed" }, | |
148 | { SAS_SATA_SPINUP_HOLD, "Spin-up hold" }, | |
149 | { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" }, | |
150 | { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" }, | |
151 | }; | |
152 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) | |
153 | ||
154 | ||
155 | /* | |
156 | * SAS host attributes | |
157 | */ | |
158 | ||
37be6eeb JB |
159 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
160 | struct class_device *cdev) | |
c7ebbbce CH |
161 | { |
162 | struct Scsi_Host *shost = dev_to_shost(dev); | |
163 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
164 | ||
165 | INIT_LIST_HEAD(&sas_host->rphy_list); | |
166 | spin_lock_init(&sas_host->lock); | |
167 | sas_host->next_target_id = 0; | |
168 | return 0; | |
169 | } | |
170 | ||
171 | static DECLARE_TRANSPORT_CLASS(sas_host_class, | |
172 | "sas_host", sas_host_setup, NULL, NULL); | |
173 | ||
174 | static int sas_host_match(struct attribute_container *cont, | |
175 | struct device *dev) | |
176 | { | |
177 | struct Scsi_Host *shost; | |
178 | struct sas_internal *i; | |
179 | ||
180 | if (!scsi_is_host_device(dev)) | |
181 | return 0; | |
182 | shost = dev_to_shost(dev); | |
183 | ||
184 | if (!shost->transportt) | |
185 | return 0; | |
186 | if (shost->transportt->host_attrs.ac.class != | |
187 | &sas_host_class.class) | |
188 | return 0; | |
189 | ||
190 | i = to_sas_internal(shost->transportt); | |
191 | return &i->t.host_attrs.ac == cont; | |
192 | } | |
193 | ||
194 | static int do_sas_phy_delete(struct device *dev, void *data) | |
195 | { | |
196 | if (scsi_is_sas_phy(dev)) | |
197 | sas_phy_delete(dev_to_phy(dev)); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | /** | |
202 | * sas_remove_host -- tear down a Scsi_Host's SAS data structures | |
203 | * @shost: Scsi Host that is torn down | |
204 | * | |
205 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host. | |
206 | * Must be called just before scsi_remove_host for SAS HBAs. | |
207 | */ | |
208 | void sas_remove_host(struct Scsi_Host *shost) | |
209 | { | |
210 | device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete); | |
211 | } | |
212 | EXPORT_SYMBOL(sas_remove_host); | |
213 | ||
214 | ||
215 | /* | |
216 | * SAS Port attributes | |
217 | */ | |
218 | ||
219 | #define sas_phy_show_simple(field, name, format_string, cast) \ | |
220 | static ssize_t \ | |
221 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
222 | { \ | |
223 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
224 | \ | |
225 | return snprintf(buf, 20, format_string, cast phy->field); \ | |
226 | } | |
227 | ||
228 | #define sas_phy_simple_attr(field, name, format_string, type) \ | |
229 | sas_phy_show_simple(field, name, format_string, (type)) \ | |
230 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
231 | ||
232 | #define sas_phy_show_protocol(field, name) \ | |
233 | static ssize_t \ | |
234 | show_sas_phy_##name(struct class_device *cdev, char *buf) \ | |
235 | { \ | |
236 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
237 | \ | |
238 | if (!phy->field) \ | |
239 | return snprintf(buf, 20, "none\n"); \ | |
240 | return get_sas_protocol_names(phy->field, buf); \ | |
241 | } | |
242 | ||
243 | #define sas_phy_protocol_attr(field, name) \ | |
244 | sas_phy_show_protocol(field, name) \ | |
245 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) | |
246 | ||
247 | #define sas_phy_show_linkspeed(field) \ | |
248 | static ssize_t \ | |
249 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
250 | { \ | |
251 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
252 | \ | |
253 | return get_sas_linkspeed_names(phy->field, buf); \ | |
254 | } | |
255 | ||
256 | #define sas_phy_linkspeed_attr(field) \ | |
257 | sas_phy_show_linkspeed(field) \ | |
258 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
259 | ||
c3ee74c4 CH |
260 | #define sas_phy_show_linkerror(field) \ |
261 | static ssize_t \ | |
262 | show_sas_phy_##field(struct class_device *cdev, char *buf) \ | |
263 | { \ | |
264 | struct sas_phy *phy = transport_class_to_phy(cdev); \ | |
265 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ | |
266 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
267 | int error; \ | |
268 | \ | |
ac01bbbd CH |
269 | if (!phy->local_attached) \ |
270 | return -EINVAL; \ | |
271 | \ | |
c3ee74c4 CH |
272 | error = i->f->get_linkerrors(phy); \ |
273 | if (error) \ | |
274 | return error; \ | |
275 | return snprintf(buf, 20, "%u\n", phy->field); \ | |
276 | } | |
277 | ||
278 | #define sas_phy_linkerror_attr(field) \ | |
279 | sas_phy_show_linkerror(field) \ | |
280 | static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) | |
281 | ||
282 | ||
c7ebbbce CH |
283 | static ssize_t |
284 | show_sas_device_type(struct class_device *cdev, char *buf) | |
285 | { | |
286 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
287 | ||
288 | if (!phy->identify.device_type) | |
289 | return snprintf(buf, 20, "none\n"); | |
290 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
291 | } | |
c7ebbbce CH |
292 | static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
293 | ||
07ba3a95 CH |
294 | static ssize_t do_sas_phy_reset(struct class_device *cdev, |
295 | size_t count, int hard_reset) | |
296 | { | |
297 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
298 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
299 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
300 | int error; | |
301 | ||
302 | if (!phy->local_attached) | |
303 | return -EINVAL; | |
304 | ||
305 | error = i->f->phy_reset(phy, hard_reset); | |
306 | if (error) | |
307 | return error; | |
308 | return count; | |
309 | }; | |
310 | ||
311 | static ssize_t store_sas_link_reset(struct class_device *cdev, | |
312 | const char *buf, size_t count) | |
313 | { | |
314 | return do_sas_phy_reset(cdev, count, 0); | |
315 | } | |
316 | static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); | |
317 | ||
318 | static ssize_t store_sas_hard_reset(struct class_device *cdev, | |
319 | const char *buf, size_t count) | |
320 | { | |
321 | return do_sas_phy_reset(cdev, count, 1); | |
322 | } | |
323 | static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); | |
324 | ||
c7ebbbce CH |
325 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
326 | initiator_port_protocols); | |
327 | sas_phy_protocol_attr(identify.target_port_protocols, | |
328 | target_port_protocols); | |
329 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
330 | unsigned long long); | |
331 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
332 | sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8); | |
333 | sas_phy_linkspeed_attr(negotiated_linkrate); | |
334 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
335 | sas_phy_linkspeed_attr(minimum_linkrate); | |
336 | sas_phy_linkspeed_attr(maximum_linkrate_hw); | |
337 | sas_phy_linkspeed_attr(maximum_linkrate); | |
c3ee74c4 CH |
338 | sas_phy_linkerror_attr(invalid_dword_count); |
339 | sas_phy_linkerror_attr(running_disparity_error_count); | |
340 | sas_phy_linkerror_attr(loss_of_dword_sync_count); | |
341 | sas_phy_linkerror_attr(phy_reset_problem_count); | |
c7ebbbce CH |
342 | |
343 | ||
344 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
345 | "sas_phy", NULL, NULL, NULL); | |
346 | ||
347 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
348 | { | |
349 | struct Scsi_Host *shost; | |
350 | struct sas_internal *i; | |
351 | ||
352 | if (!scsi_is_sas_phy(dev)) | |
353 | return 0; | |
354 | shost = dev_to_shost(dev->parent); | |
355 | ||
356 | if (!shost->transportt) | |
357 | return 0; | |
358 | if (shost->transportt->host_attrs.ac.class != | |
359 | &sas_host_class.class) | |
360 | return 0; | |
361 | ||
362 | i = to_sas_internal(shost->transportt); | |
363 | return &i->phy_attr_cont.ac == cont; | |
364 | } | |
365 | ||
366 | static void sas_phy_release(struct device *dev) | |
367 | { | |
368 | struct sas_phy *phy = dev_to_phy(dev); | |
369 | ||
370 | put_device(dev->parent); | |
371 | kfree(phy); | |
372 | } | |
373 | ||
374 | /** | |
375 | * sas_phy_alloc -- allocates and initialize a SAS PHY structure | |
376 | * @parent: Parent device | |
377 | * @number: Port number | |
378 | * | |
379 | * Allocates an SAS PHY structure. It will be added in the device tree | |
380 | * below the device specified by @parent, which has to be either a Scsi_Host | |
381 | * or sas_rphy. | |
382 | * | |
383 | * Returns: | |
384 | * SAS PHY allocated or %NULL if the allocation failed. | |
385 | */ | |
386 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
387 | { | |
388 | struct Scsi_Host *shost = dev_to_shost(parent); | |
389 | struct sas_phy *phy; | |
390 | ||
391 | phy = kmalloc(sizeof(*phy), GFP_KERNEL); | |
392 | if (!phy) | |
393 | return NULL; | |
394 | memset(phy, 0, sizeof(*phy)); | |
395 | ||
396 | get_device(parent); | |
397 | ||
398 | phy->number = number; | |
399 | ||
400 | device_initialize(&phy->dev); | |
401 | phy->dev.parent = get_device(parent); | |
402 | phy->dev.release = sas_phy_release; | |
403 | sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); | |
404 | ||
405 | transport_setup_device(&phy->dev); | |
406 | ||
407 | return phy; | |
408 | } | |
409 | EXPORT_SYMBOL(sas_phy_alloc); | |
410 | ||
411 | /** | |
412 | * sas_phy_add -- add a SAS PHY to the device hierachy | |
413 | * @phy: The PHY to be added | |
414 | * | |
415 | * Publishes a SAS PHY to the rest of the system. | |
416 | */ | |
417 | int sas_phy_add(struct sas_phy *phy) | |
418 | { | |
419 | int error; | |
420 | ||
421 | error = device_add(&phy->dev); | |
422 | if (!error) { | |
423 | transport_add_device(&phy->dev); | |
424 | transport_configure_device(&phy->dev); | |
425 | } | |
426 | ||
427 | return error; | |
428 | } | |
429 | EXPORT_SYMBOL(sas_phy_add); | |
430 | ||
431 | /** | |
432 | * sas_phy_free -- free a SAS PHY | |
433 | * @phy: SAS PHY to free | |
434 | * | |
435 | * Frees the specified SAS PHY. | |
436 | * | |
437 | * Note: | |
438 | * This function must only be called on a PHY that has not | |
439 | * sucessfully been added using sas_phy_add(). | |
440 | */ | |
441 | void sas_phy_free(struct sas_phy *phy) | |
442 | { | |
443 | transport_destroy_device(&phy->dev); | |
444 | put_device(phy->dev.parent); | |
445 | put_device(phy->dev.parent); | |
446 | put_device(phy->dev.parent); | |
447 | kfree(phy); | |
448 | } | |
449 | EXPORT_SYMBOL(sas_phy_free); | |
450 | ||
451 | /** | |
452 | * sas_phy_delete -- remove SAS PHY | |
453 | * @phy: SAS PHY to remove | |
454 | * | |
455 | * Removes the specified SAS PHY. If the SAS PHY has an | |
456 | * associated remote PHY it is removed before. | |
457 | */ | |
458 | void | |
459 | sas_phy_delete(struct sas_phy *phy) | |
460 | { | |
461 | struct device *dev = &phy->dev; | |
462 | ||
463 | if (phy->rphy) | |
464 | sas_rphy_delete(phy->rphy); | |
465 | ||
466 | transport_remove_device(dev); | |
467 | device_del(dev); | |
468 | transport_destroy_device(dev); | |
469 | put_device(dev->parent); | |
470 | } | |
471 | EXPORT_SYMBOL(sas_phy_delete); | |
472 | ||
473 | /** | |
474 | * scsi_is_sas_phy -- check if a struct device represents a SAS PHY | |
475 | * @dev: device to check | |
476 | * | |
477 | * Returns: | |
478 | * %1 if the device represents a SAS PHY, %0 else | |
479 | */ | |
480 | int scsi_is_sas_phy(const struct device *dev) | |
481 | { | |
482 | return dev->release == sas_phy_release; | |
483 | } | |
484 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
485 | ||
486 | /* | |
487 | * SAS remote PHY attributes. | |
488 | */ | |
489 | ||
490 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
491 | static ssize_t \ | |
492 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
493 | { \ | |
494 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
495 | \ | |
496 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
497 | } | |
498 | ||
499 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
500 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
501 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
502 | show_sas_rphy_##name, NULL) | |
503 | ||
504 | #define sas_rphy_show_protocol(field, name) \ | |
505 | static ssize_t \ | |
506 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
507 | { \ | |
508 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
509 | \ | |
510 | if (!rphy->field) \ | |
511 | return snprintf(buf, 20, "none\n"); \ | |
512 | return get_sas_protocol_names(rphy->field, buf); \ | |
513 | } | |
514 | ||
515 | #define sas_rphy_protocol_attr(field, name) \ | |
516 | sas_rphy_show_protocol(field, name) \ | |
517 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
518 | show_sas_rphy_##name, NULL) | |
519 | ||
520 | static ssize_t | |
521 | show_sas_rphy_device_type(struct class_device *cdev, char *buf) | |
522 | { | |
523 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
524 | ||
525 | if (!rphy->identify.device_type) | |
526 | return snprintf(buf, 20, "none\n"); | |
527 | return get_sas_device_type_names( | |
528 | rphy->identify.device_type, buf); | |
529 | } | |
530 | ||
531 | static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO, | |
532 | show_sas_rphy_device_type, NULL); | |
533 | ||
534 | sas_rphy_protocol_attr(identify.initiator_port_protocols, | |
535 | initiator_port_protocols); | |
536 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
537 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
538 | unsigned long long); | |
539 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
540 | ||
541 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, | |
542 | "sas_rphy", NULL, NULL, NULL); | |
543 | ||
544 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
545 | { | |
546 | struct Scsi_Host *shost; | |
547 | struct sas_internal *i; | |
548 | ||
549 | if (!scsi_is_sas_rphy(dev)) | |
550 | return 0; | |
551 | shost = dev_to_shost(dev->parent->parent); | |
552 | ||
553 | if (!shost->transportt) | |
554 | return 0; | |
555 | if (shost->transportt->host_attrs.ac.class != | |
556 | &sas_host_class.class) | |
557 | return 0; | |
558 | ||
559 | i = to_sas_internal(shost->transportt); | |
560 | return &i->rphy_attr_cont.ac == cont; | |
561 | } | |
562 | ||
563 | static void sas_rphy_release(struct device *dev) | |
564 | { | |
565 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
566 | ||
567 | put_device(dev->parent); | |
568 | kfree(rphy); | |
569 | } | |
570 | ||
571 | /** | |
572 | * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure | |
573 | * @parent: SAS PHY this remote PHY is conneted to | |
574 | * | |
575 | * Allocates an SAS remote PHY structure, connected to @parent. | |
576 | * | |
577 | * Returns: | |
578 | * SAS PHY allocated or %NULL if the allocation failed. | |
579 | */ | |
580 | struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent) | |
581 | { | |
582 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
583 | struct sas_rphy *rphy; | |
584 | ||
585 | rphy = kmalloc(sizeof(*rphy), GFP_KERNEL); | |
586 | if (!rphy) { | |
587 | put_device(&parent->dev); | |
588 | return NULL; | |
589 | } | |
590 | memset(rphy, 0, sizeof(*rphy)); | |
591 | ||
592 | device_initialize(&rphy->dev); | |
593 | rphy->dev.parent = get_device(&parent->dev); | |
594 | rphy->dev.release = sas_rphy_release; | |
595 | sprintf(rphy->dev.bus_id, "rphy-%d:%d", | |
596 | shost->host_no, parent->number); | |
597 | transport_setup_device(&rphy->dev); | |
598 | ||
599 | return rphy; | |
600 | } | |
601 | EXPORT_SYMBOL(sas_rphy_alloc); | |
602 | ||
603 | /** | |
604 | * sas_rphy_add -- add a SAS remote PHY to the device hierachy | |
605 | * @rphy: The remote PHY to be added | |
606 | * | |
607 | * Publishes a SAS remote PHY to the rest of the system. | |
608 | */ | |
609 | int sas_rphy_add(struct sas_rphy *rphy) | |
610 | { | |
611 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
612 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
613 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
614 | struct sas_identify *identify = &rphy->identify; | |
615 | int error; | |
616 | ||
617 | if (parent->rphy) | |
618 | return -ENXIO; | |
619 | parent->rphy = rphy; | |
620 | ||
621 | error = device_add(&rphy->dev); | |
622 | if (error) | |
623 | return error; | |
624 | transport_add_device(&rphy->dev); | |
625 | transport_configure_device(&rphy->dev); | |
626 | ||
627 | spin_lock(&sas_host->lock); | |
628 | list_add_tail(&rphy->list, &sas_host->rphy_list); | |
629 | if (identify->device_type == SAS_END_DEVICE && | |
630 | (identify->target_port_protocols & | |
631 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
632 | rphy->scsi_target_id = sas_host->next_target_id++; | |
633 | else | |
634 | rphy->scsi_target_id = -1; | |
635 | spin_unlock(&sas_host->lock); | |
636 | ||
637 | if (rphy->scsi_target_id != -1) { | |
638 | scsi_scan_target(&rphy->dev, parent->number, | |
639 | rphy->scsi_target_id, ~0, 0); | |
640 | } | |
641 | ||
642 | return 0; | |
643 | } | |
644 | EXPORT_SYMBOL(sas_rphy_add); | |
645 | ||
646 | /** | |
647 | * sas_rphy_free -- free a SAS remote PHY | |
648 | * @rphy SAS remote PHY to free | |
649 | * | |
650 | * Frees the specified SAS remote PHY. | |
651 | * | |
652 | * Note: | |
653 | * This function must only be called on a remote | |
654 | * PHY that has not sucessfully been added using | |
655 | * sas_rphy_add(). | |
656 | */ | |
657 | void sas_rphy_free(struct sas_rphy *rphy) | |
658 | { | |
659 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); | |
660 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
661 | ||
662 | spin_lock(&sas_host->lock); | |
663 | list_del(&rphy->list); | |
664 | spin_unlock(&sas_host->lock); | |
665 | ||
666 | transport_destroy_device(&rphy->dev); | |
667 | put_device(rphy->dev.parent); | |
668 | put_device(rphy->dev.parent); | |
669 | put_device(rphy->dev.parent); | |
670 | kfree(rphy); | |
671 | } | |
672 | EXPORT_SYMBOL(sas_rphy_free); | |
673 | ||
674 | /** | |
675 | * sas_rphy_delete -- remove SAS remote PHY | |
676 | * @rphy: SAS remote PHY to remove | |
677 | * | |
678 | * Removes the specified SAS remote PHY. | |
679 | */ | |
680 | void | |
681 | sas_rphy_delete(struct sas_rphy *rphy) | |
682 | { | |
683 | struct device *dev = &rphy->dev; | |
684 | struct sas_phy *parent = dev_to_phy(dev->parent); | |
685 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
686 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
687 | ||
fe8b2304 | 688 | scsi_remove_target(dev); |
c7ebbbce | 689 | |
fe8b2304 CH |
690 | transport_remove_device(dev); |
691 | device_del(dev); | |
692 | transport_destroy_device(dev); | |
c7ebbbce CH |
693 | |
694 | spin_lock(&sas_host->lock); | |
695 | list_del(&rphy->list); | |
696 | spin_unlock(&sas_host->lock); | |
697 | ||
c7ebbbce CH |
698 | put_device(&parent->dev); |
699 | } | |
700 | EXPORT_SYMBOL(sas_rphy_delete); | |
701 | ||
702 | /** | |
703 | * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY | |
704 | * @dev: device to check | |
705 | * | |
706 | * Returns: | |
707 | * %1 if the device represents a SAS remote PHY, %0 else | |
708 | */ | |
709 | int scsi_is_sas_rphy(const struct device *dev) | |
710 | { | |
711 | return dev->release == sas_rphy_release; | |
712 | } | |
713 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
714 | ||
715 | ||
716 | /* | |
717 | * SCSI scan helper | |
718 | */ | |
719 | ||
720 | static struct device *sas_target_parent(struct Scsi_Host *shost, | |
721 | int channel, uint id) | |
722 | { | |
723 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
724 | struct sas_rphy *rphy; | |
725 | struct device *dev = NULL; | |
726 | ||
727 | spin_lock(&sas_host->lock); | |
728 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { | |
729 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
730 | if (parent->number == channel && | |
731 | rphy->scsi_target_id == id) | |
732 | dev = &rphy->dev; | |
733 | } | |
734 | spin_unlock(&sas_host->lock); | |
735 | ||
736 | return dev; | |
737 | } | |
738 | ||
739 | ||
740 | /* | |
741 | * Setup / Teardown code | |
742 | */ | |
743 | ||
744 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
745 | i->private_rphy_attrs[count] = class_device_attr_##field; \ | |
746 | i->private_rphy_attrs[count].attr.mode = S_IRUGO; \ | |
747 | i->private_rphy_attrs[count].store = NULL; \ | |
748 | i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \ | |
749 | count++ | |
750 | ||
751 | #define SETUP_PORT_ATTRIBUTE(field) \ | |
752 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
753 | i->private_phy_attrs[count].attr.mode = S_IRUGO; \ | |
754 | i->private_phy_attrs[count].store = NULL; \ | |
755 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
756 | count++ | |
757 | ||
07ba3a95 CH |
758 | #define SETUP_PORT_ATTRIBUTE_WRONLY(field) \ |
759 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
760 | i->private_phy_attrs[count].attr.mode = S_IWUGO; \ | |
761 | i->private_phy_attrs[count].show = NULL; \ | |
762 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
763 | count++ | |
764 | ||
c7ebbbce CH |
765 | |
766 | /** | |
767 | * sas_attach_transport -- instantiate SAS transport template | |
768 | * @ft: SAS transport class function template | |
769 | */ | |
770 | struct scsi_transport_template * | |
771 | sas_attach_transport(struct sas_function_template *ft) | |
772 | { | |
773 | struct sas_internal *i; | |
774 | int count; | |
775 | ||
776 | i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL); | |
777 | if (!i) | |
778 | return NULL; | |
779 | memset(i, 0, sizeof(struct sas_internal)); | |
780 | ||
781 | i->t.target_parent = sas_target_parent; | |
782 | ||
783 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
784 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
785 | i->t.host_attrs.ac.match = sas_host_match; | |
786 | transport_container_register(&i->t.host_attrs); | |
787 | i->t.host_size = sizeof(struct sas_host_attrs); | |
788 | ||
789 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
790 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
791 | i->phy_attr_cont.ac.match = sas_phy_match; | |
792 | transport_container_register(&i->phy_attr_cont); | |
793 | ||
794 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; | |
795 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
796 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
797 | transport_container_register(&i->rphy_attr_cont); | |
798 | ||
799 | i->f = ft; | |
800 | ||
801 | count = 0; | |
802 | i->host_attrs[count] = NULL; | |
803 | ||
804 | count = 0; | |
805 | SETUP_PORT_ATTRIBUTE(initiator_port_protocols); | |
806 | SETUP_PORT_ATTRIBUTE(target_port_protocols); | |
807 | SETUP_PORT_ATTRIBUTE(device_type); | |
808 | SETUP_PORT_ATTRIBUTE(sas_address); | |
809 | SETUP_PORT_ATTRIBUTE(phy_identifier); | |
810 | SETUP_PORT_ATTRIBUTE(port_identifier); | |
811 | SETUP_PORT_ATTRIBUTE(negotiated_linkrate); | |
812 | SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw); | |
813 | SETUP_PORT_ATTRIBUTE(minimum_linkrate); | |
814 | SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw); | |
815 | SETUP_PORT_ATTRIBUTE(maximum_linkrate); | |
c3ee74c4 CH |
816 | |
817 | SETUP_PORT_ATTRIBUTE(invalid_dword_count); | |
818 | SETUP_PORT_ATTRIBUTE(running_disparity_error_count); | |
819 | SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count); | |
820 | SETUP_PORT_ATTRIBUTE(phy_reset_problem_count); | |
07ba3a95 CH |
821 | SETUP_PORT_ATTRIBUTE_WRONLY(link_reset); |
822 | SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset); | |
c7ebbbce CH |
823 | i->phy_attrs[count] = NULL; |
824 | ||
825 | count = 0; | |
826 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
827 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
828 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
829 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
830 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
831 | i->rphy_attrs[count] = NULL; | |
832 | ||
833 | return &i->t; | |
834 | } | |
835 | EXPORT_SYMBOL(sas_attach_transport); | |
836 | ||
837 | /** | |
838 | * sas_release_transport -- release SAS transport template instance | |
839 | * @t: transport template instance | |
840 | */ | |
841 | void sas_release_transport(struct scsi_transport_template *t) | |
842 | { | |
843 | struct sas_internal *i = to_sas_internal(t); | |
844 | ||
845 | transport_container_unregister(&i->t.host_attrs); | |
846 | transport_container_unregister(&i->phy_attr_cont); | |
847 | transport_container_unregister(&i->rphy_attr_cont); | |
848 | ||
849 | kfree(i); | |
850 | } | |
851 | EXPORT_SYMBOL(sas_release_transport); | |
852 | ||
853 | static __init int sas_transport_init(void) | |
854 | { | |
855 | int error; | |
856 | ||
857 | error = transport_class_register(&sas_host_class); | |
858 | if (error) | |
859 | goto out; | |
860 | error = transport_class_register(&sas_phy_class); | |
861 | if (error) | |
862 | goto out_unregister_transport; | |
863 | error = transport_class_register(&sas_rphy_class); | |
864 | if (error) | |
865 | goto out_unregister_phy; | |
866 | ||
867 | return 0; | |
868 | ||
869 | out_unregister_phy: | |
870 | transport_class_unregister(&sas_phy_class); | |
871 | out_unregister_transport: | |
872 | transport_class_unregister(&sas_host_class); | |
873 | out: | |
874 | return error; | |
875 | ||
876 | } | |
877 | ||
878 | static void __exit sas_transport_exit(void) | |
879 | { | |
880 | transport_class_unregister(&sas_host_class); | |
881 | transport_class_unregister(&sas_phy_class); | |
882 | transport_class_unregister(&sas_rphy_class); | |
883 | } | |
884 | ||
885 | MODULE_AUTHOR("Christoph Hellwig"); | |
886 | MODULE_DESCRIPTION("SAS Transphy Attributes"); | |
887 | MODULE_LICENSE("GPL"); | |
888 | ||
889 | module_init(sas_transport_init); | |
890 | module_exit(sas_transport_exit); |