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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 | |
37 | #define SAS_PORT_ATTRS 11 | |
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 | ||
260 | static ssize_t | |
261 | show_sas_device_type(struct class_device *cdev, char *buf) | |
262 | { | |
263 | struct sas_phy *phy = transport_class_to_phy(cdev); | |
264 | ||
265 | if (!phy->identify.device_type) | |
266 | return snprintf(buf, 20, "none\n"); | |
267 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
268 | } | |
269 | ||
270 | static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); | |
271 | ||
272 | sas_phy_protocol_attr(identify.initiator_port_protocols, | |
273 | initiator_port_protocols); | |
274 | sas_phy_protocol_attr(identify.target_port_protocols, | |
275 | target_port_protocols); | |
276 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
277 | unsigned long long); | |
278 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
279 | sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8); | |
280 | sas_phy_linkspeed_attr(negotiated_linkrate); | |
281 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
282 | sas_phy_linkspeed_attr(minimum_linkrate); | |
283 | sas_phy_linkspeed_attr(maximum_linkrate_hw); | |
284 | sas_phy_linkspeed_attr(maximum_linkrate); | |
285 | ||
286 | ||
287 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
288 | "sas_phy", NULL, NULL, NULL); | |
289 | ||
290 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
291 | { | |
292 | struct Scsi_Host *shost; | |
293 | struct sas_internal *i; | |
294 | ||
295 | if (!scsi_is_sas_phy(dev)) | |
296 | return 0; | |
297 | shost = dev_to_shost(dev->parent); | |
298 | ||
299 | if (!shost->transportt) | |
300 | return 0; | |
301 | if (shost->transportt->host_attrs.ac.class != | |
302 | &sas_host_class.class) | |
303 | return 0; | |
304 | ||
305 | i = to_sas_internal(shost->transportt); | |
306 | return &i->phy_attr_cont.ac == cont; | |
307 | } | |
308 | ||
309 | static void sas_phy_release(struct device *dev) | |
310 | { | |
311 | struct sas_phy *phy = dev_to_phy(dev); | |
312 | ||
313 | put_device(dev->parent); | |
314 | kfree(phy); | |
315 | } | |
316 | ||
317 | /** | |
318 | * sas_phy_alloc -- allocates and initialize a SAS PHY structure | |
319 | * @parent: Parent device | |
320 | * @number: Port number | |
321 | * | |
322 | * Allocates an SAS PHY structure. It will be added in the device tree | |
323 | * below the device specified by @parent, which has to be either a Scsi_Host | |
324 | * or sas_rphy. | |
325 | * | |
326 | * Returns: | |
327 | * SAS PHY allocated or %NULL if the allocation failed. | |
328 | */ | |
329 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
330 | { | |
331 | struct Scsi_Host *shost = dev_to_shost(parent); | |
332 | struct sas_phy *phy; | |
333 | ||
334 | phy = kmalloc(sizeof(*phy), GFP_KERNEL); | |
335 | if (!phy) | |
336 | return NULL; | |
337 | memset(phy, 0, sizeof(*phy)); | |
338 | ||
339 | get_device(parent); | |
340 | ||
341 | phy->number = number; | |
342 | ||
343 | device_initialize(&phy->dev); | |
344 | phy->dev.parent = get_device(parent); | |
345 | phy->dev.release = sas_phy_release; | |
346 | sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number); | |
347 | ||
348 | transport_setup_device(&phy->dev); | |
349 | ||
350 | return phy; | |
351 | } | |
352 | EXPORT_SYMBOL(sas_phy_alloc); | |
353 | ||
354 | /** | |
355 | * sas_phy_add -- add a SAS PHY to the device hierachy | |
356 | * @phy: The PHY to be added | |
357 | * | |
358 | * Publishes a SAS PHY to the rest of the system. | |
359 | */ | |
360 | int sas_phy_add(struct sas_phy *phy) | |
361 | { | |
362 | int error; | |
363 | ||
364 | error = device_add(&phy->dev); | |
365 | if (!error) { | |
366 | transport_add_device(&phy->dev); | |
367 | transport_configure_device(&phy->dev); | |
368 | } | |
369 | ||
370 | return error; | |
371 | } | |
372 | EXPORT_SYMBOL(sas_phy_add); | |
373 | ||
374 | /** | |
375 | * sas_phy_free -- free a SAS PHY | |
376 | * @phy: SAS PHY to free | |
377 | * | |
378 | * Frees the specified SAS PHY. | |
379 | * | |
380 | * Note: | |
381 | * This function must only be called on a PHY that has not | |
382 | * sucessfully been added using sas_phy_add(). | |
383 | */ | |
384 | void sas_phy_free(struct sas_phy *phy) | |
385 | { | |
386 | transport_destroy_device(&phy->dev); | |
387 | put_device(phy->dev.parent); | |
388 | put_device(phy->dev.parent); | |
389 | put_device(phy->dev.parent); | |
390 | kfree(phy); | |
391 | } | |
392 | EXPORT_SYMBOL(sas_phy_free); | |
393 | ||
394 | /** | |
395 | * sas_phy_delete -- remove SAS PHY | |
396 | * @phy: SAS PHY to remove | |
397 | * | |
398 | * Removes the specified SAS PHY. If the SAS PHY has an | |
399 | * associated remote PHY it is removed before. | |
400 | */ | |
401 | void | |
402 | sas_phy_delete(struct sas_phy *phy) | |
403 | { | |
404 | struct device *dev = &phy->dev; | |
405 | ||
406 | if (phy->rphy) | |
407 | sas_rphy_delete(phy->rphy); | |
408 | ||
409 | transport_remove_device(dev); | |
410 | device_del(dev); | |
411 | transport_destroy_device(dev); | |
412 | put_device(dev->parent); | |
413 | } | |
414 | EXPORT_SYMBOL(sas_phy_delete); | |
415 | ||
416 | /** | |
417 | * scsi_is_sas_phy -- check if a struct device represents a SAS PHY | |
418 | * @dev: device to check | |
419 | * | |
420 | * Returns: | |
421 | * %1 if the device represents a SAS PHY, %0 else | |
422 | */ | |
423 | int scsi_is_sas_phy(const struct device *dev) | |
424 | { | |
425 | return dev->release == sas_phy_release; | |
426 | } | |
427 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
428 | ||
429 | /* | |
430 | * SAS remote PHY attributes. | |
431 | */ | |
432 | ||
433 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
434 | static ssize_t \ | |
435 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
436 | { \ | |
437 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
438 | \ | |
439 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
440 | } | |
441 | ||
442 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
443 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
444 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
445 | show_sas_rphy_##name, NULL) | |
446 | ||
447 | #define sas_rphy_show_protocol(field, name) \ | |
448 | static ssize_t \ | |
449 | show_sas_rphy_##name(struct class_device *cdev, char *buf) \ | |
450 | { \ | |
451 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); \ | |
452 | \ | |
453 | if (!rphy->field) \ | |
454 | return snprintf(buf, 20, "none\n"); \ | |
455 | return get_sas_protocol_names(rphy->field, buf); \ | |
456 | } | |
457 | ||
458 | #define sas_rphy_protocol_attr(field, name) \ | |
459 | sas_rphy_show_protocol(field, name) \ | |
460 | static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \ | |
461 | show_sas_rphy_##name, NULL) | |
462 | ||
463 | static ssize_t | |
464 | show_sas_rphy_device_type(struct class_device *cdev, char *buf) | |
465 | { | |
466 | struct sas_rphy *rphy = transport_class_to_rphy(cdev); | |
467 | ||
468 | if (!rphy->identify.device_type) | |
469 | return snprintf(buf, 20, "none\n"); | |
470 | return get_sas_device_type_names( | |
471 | rphy->identify.device_type, buf); | |
472 | } | |
473 | ||
474 | static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO, | |
475 | show_sas_rphy_device_type, NULL); | |
476 | ||
477 | sas_rphy_protocol_attr(identify.initiator_port_protocols, | |
478 | initiator_port_protocols); | |
479 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
480 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
481 | unsigned long long); | |
482 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
483 | ||
484 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, | |
485 | "sas_rphy", NULL, NULL, NULL); | |
486 | ||
487 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
488 | { | |
489 | struct Scsi_Host *shost; | |
490 | struct sas_internal *i; | |
491 | ||
492 | if (!scsi_is_sas_rphy(dev)) | |
493 | return 0; | |
494 | shost = dev_to_shost(dev->parent->parent); | |
495 | ||
496 | if (!shost->transportt) | |
497 | return 0; | |
498 | if (shost->transportt->host_attrs.ac.class != | |
499 | &sas_host_class.class) | |
500 | return 0; | |
501 | ||
502 | i = to_sas_internal(shost->transportt); | |
503 | return &i->rphy_attr_cont.ac == cont; | |
504 | } | |
505 | ||
506 | static void sas_rphy_release(struct device *dev) | |
507 | { | |
508 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
509 | ||
510 | put_device(dev->parent); | |
511 | kfree(rphy); | |
512 | } | |
513 | ||
514 | /** | |
515 | * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure | |
516 | * @parent: SAS PHY this remote PHY is conneted to | |
517 | * | |
518 | * Allocates an SAS remote PHY structure, connected to @parent. | |
519 | * | |
520 | * Returns: | |
521 | * SAS PHY allocated or %NULL if the allocation failed. | |
522 | */ | |
523 | struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent) | |
524 | { | |
525 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
526 | struct sas_rphy *rphy; | |
527 | ||
528 | rphy = kmalloc(sizeof(*rphy), GFP_KERNEL); | |
529 | if (!rphy) { | |
530 | put_device(&parent->dev); | |
531 | return NULL; | |
532 | } | |
533 | memset(rphy, 0, sizeof(*rphy)); | |
534 | ||
535 | device_initialize(&rphy->dev); | |
536 | rphy->dev.parent = get_device(&parent->dev); | |
537 | rphy->dev.release = sas_rphy_release; | |
538 | sprintf(rphy->dev.bus_id, "rphy-%d:%d", | |
539 | shost->host_no, parent->number); | |
540 | transport_setup_device(&rphy->dev); | |
541 | ||
542 | return rphy; | |
543 | } | |
544 | EXPORT_SYMBOL(sas_rphy_alloc); | |
545 | ||
546 | /** | |
547 | * sas_rphy_add -- add a SAS remote PHY to the device hierachy | |
548 | * @rphy: The remote PHY to be added | |
549 | * | |
550 | * Publishes a SAS remote PHY to the rest of the system. | |
551 | */ | |
552 | int sas_rphy_add(struct sas_rphy *rphy) | |
553 | { | |
554 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
555 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
556 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
557 | struct sas_identify *identify = &rphy->identify; | |
558 | int error; | |
559 | ||
560 | if (parent->rphy) | |
561 | return -ENXIO; | |
562 | parent->rphy = rphy; | |
563 | ||
564 | error = device_add(&rphy->dev); | |
565 | if (error) | |
566 | return error; | |
567 | transport_add_device(&rphy->dev); | |
568 | transport_configure_device(&rphy->dev); | |
569 | ||
570 | spin_lock(&sas_host->lock); | |
571 | list_add_tail(&rphy->list, &sas_host->rphy_list); | |
572 | if (identify->device_type == SAS_END_DEVICE && | |
573 | (identify->target_port_protocols & | |
574 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
575 | rphy->scsi_target_id = sas_host->next_target_id++; | |
576 | else | |
577 | rphy->scsi_target_id = -1; | |
578 | spin_unlock(&sas_host->lock); | |
579 | ||
580 | if (rphy->scsi_target_id != -1) { | |
581 | scsi_scan_target(&rphy->dev, parent->number, | |
582 | rphy->scsi_target_id, ~0, 0); | |
583 | } | |
584 | ||
585 | return 0; | |
586 | } | |
587 | EXPORT_SYMBOL(sas_rphy_add); | |
588 | ||
589 | /** | |
590 | * sas_rphy_free -- free a SAS remote PHY | |
591 | * @rphy SAS remote PHY to free | |
592 | * | |
593 | * Frees the specified SAS remote PHY. | |
594 | * | |
595 | * Note: | |
596 | * This function must only be called on a remote | |
597 | * PHY that has not sucessfully been added using | |
598 | * sas_rphy_add(). | |
599 | */ | |
600 | void sas_rphy_free(struct sas_rphy *rphy) | |
601 | { | |
602 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); | |
603 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
604 | ||
605 | spin_lock(&sas_host->lock); | |
606 | list_del(&rphy->list); | |
607 | spin_unlock(&sas_host->lock); | |
608 | ||
609 | transport_destroy_device(&rphy->dev); | |
610 | put_device(rphy->dev.parent); | |
611 | put_device(rphy->dev.parent); | |
612 | put_device(rphy->dev.parent); | |
613 | kfree(rphy); | |
614 | } | |
615 | EXPORT_SYMBOL(sas_rphy_free); | |
616 | ||
617 | /** | |
618 | * sas_rphy_delete -- remove SAS remote PHY | |
619 | * @rphy: SAS remote PHY to remove | |
620 | * | |
621 | * Removes the specified SAS remote PHY. | |
622 | */ | |
623 | void | |
624 | sas_rphy_delete(struct sas_rphy *rphy) | |
625 | { | |
626 | struct device *dev = &rphy->dev; | |
627 | struct sas_phy *parent = dev_to_phy(dev->parent); | |
628 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); | |
629 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
630 | ||
fe8b2304 | 631 | scsi_remove_target(dev); |
c7ebbbce | 632 | |
fe8b2304 CH |
633 | transport_remove_device(dev); |
634 | device_del(dev); | |
635 | transport_destroy_device(dev); | |
c7ebbbce CH |
636 | |
637 | spin_lock(&sas_host->lock); | |
638 | list_del(&rphy->list); | |
639 | spin_unlock(&sas_host->lock); | |
640 | ||
c7ebbbce CH |
641 | put_device(&parent->dev); |
642 | } | |
643 | EXPORT_SYMBOL(sas_rphy_delete); | |
644 | ||
645 | /** | |
646 | * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY | |
647 | * @dev: device to check | |
648 | * | |
649 | * Returns: | |
650 | * %1 if the device represents a SAS remote PHY, %0 else | |
651 | */ | |
652 | int scsi_is_sas_rphy(const struct device *dev) | |
653 | { | |
654 | return dev->release == sas_rphy_release; | |
655 | } | |
656 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
657 | ||
658 | ||
659 | /* | |
660 | * SCSI scan helper | |
661 | */ | |
662 | ||
663 | static struct device *sas_target_parent(struct Scsi_Host *shost, | |
664 | int channel, uint id) | |
665 | { | |
666 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
667 | struct sas_rphy *rphy; | |
668 | struct device *dev = NULL; | |
669 | ||
670 | spin_lock(&sas_host->lock); | |
671 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { | |
672 | struct sas_phy *parent = dev_to_phy(rphy->dev.parent); | |
673 | if (parent->number == channel && | |
674 | rphy->scsi_target_id == id) | |
675 | dev = &rphy->dev; | |
676 | } | |
677 | spin_unlock(&sas_host->lock); | |
678 | ||
679 | return dev; | |
680 | } | |
681 | ||
682 | ||
683 | /* | |
684 | * Setup / Teardown code | |
685 | */ | |
686 | ||
687 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
688 | i->private_rphy_attrs[count] = class_device_attr_##field; \ | |
689 | i->private_rphy_attrs[count].attr.mode = S_IRUGO; \ | |
690 | i->private_rphy_attrs[count].store = NULL; \ | |
691 | i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \ | |
692 | count++ | |
693 | ||
694 | #define SETUP_PORT_ATTRIBUTE(field) \ | |
695 | i->private_phy_attrs[count] = class_device_attr_##field; \ | |
696 | i->private_phy_attrs[count].attr.mode = S_IRUGO; \ | |
697 | i->private_phy_attrs[count].store = NULL; \ | |
698 | i->phy_attrs[count] = &i->private_phy_attrs[count]; \ | |
699 | count++ | |
700 | ||
701 | ||
702 | /** | |
703 | * sas_attach_transport -- instantiate SAS transport template | |
704 | * @ft: SAS transport class function template | |
705 | */ | |
706 | struct scsi_transport_template * | |
707 | sas_attach_transport(struct sas_function_template *ft) | |
708 | { | |
709 | struct sas_internal *i; | |
710 | int count; | |
711 | ||
712 | i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL); | |
713 | if (!i) | |
714 | return NULL; | |
715 | memset(i, 0, sizeof(struct sas_internal)); | |
716 | ||
717 | i->t.target_parent = sas_target_parent; | |
718 | ||
719 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
720 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
721 | i->t.host_attrs.ac.match = sas_host_match; | |
722 | transport_container_register(&i->t.host_attrs); | |
723 | i->t.host_size = sizeof(struct sas_host_attrs); | |
724 | ||
725 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
726 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
727 | i->phy_attr_cont.ac.match = sas_phy_match; | |
728 | transport_container_register(&i->phy_attr_cont); | |
729 | ||
730 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; | |
731 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
732 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
733 | transport_container_register(&i->rphy_attr_cont); | |
734 | ||
735 | i->f = ft; | |
736 | ||
737 | count = 0; | |
738 | i->host_attrs[count] = NULL; | |
739 | ||
740 | count = 0; | |
741 | SETUP_PORT_ATTRIBUTE(initiator_port_protocols); | |
742 | SETUP_PORT_ATTRIBUTE(target_port_protocols); | |
743 | SETUP_PORT_ATTRIBUTE(device_type); | |
744 | SETUP_PORT_ATTRIBUTE(sas_address); | |
745 | SETUP_PORT_ATTRIBUTE(phy_identifier); | |
746 | SETUP_PORT_ATTRIBUTE(port_identifier); | |
747 | SETUP_PORT_ATTRIBUTE(negotiated_linkrate); | |
748 | SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw); | |
749 | SETUP_PORT_ATTRIBUTE(minimum_linkrate); | |
750 | SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw); | |
751 | SETUP_PORT_ATTRIBUTE(maximum_linkrate); | |
752 | i->phy_attrs[count] = NULL; | |
753 | ||
754 | count = 0; | |
755 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
756 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
757 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
758 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
759 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
760 | i->rphy_attrs[count] = NULL; | |
761 | ||
762 | return &i->t; | |
763 | } | |
764 | EXPORT_SYMBOL(sas_attach_transport); | |
765 | ||
766 | /** | |
767 | * sas_release_transport -- release SAS transport template instance | |
768 | * @t: transport template instance | |
769 | */ | |
770 | void sas_release_transport(struct scsi_transport_template *t) | |
771 | { | |
772 | struct sas_internal *i = to_sas_internal(t); | |
773 | ||
774 | transport_container_unregister(&i->t.host_attrs); | |
775 | transport_container_unregister(&i->phy_attr_cont); | |
776 | transport_container_unregister(&i->rphy_attr_cont); | |
777 | ||
778 | kfree(i); | |
779 | } | |
780 | EXPORT_SYMBOL(sas_release_transport); | |
781 | ||
782 | static __init int sas_transport_init(void) | |
783 | { | |
784 | int error; | |
785 | ||
786 | error = transport_class_register(&sas_host_class); | |
787 | if (error) | |
788 | goto out; | |
789 | error = transport_class_register(&sas_phy_class); | |
790 | if (error) | |
791 | goto out_unregister_transport; | |
792 | error = transport_class_register(&sas_rphy_class); | |
793 | if (error) | |
794 | goto out_unregister_phy; | |
795 | ||
796 | return 0; | |
797 | ||
798 | out_unregister_phy: | |
799 | transport_class_unregister(&sas_phy_class); | |
800 | out_unregister_transport: | |
801 | transport_class_unregister(&sas_host_class); | |
802 | out: | |
803 | return error; | |
804 | ||
805 | } | |
806 | ||
807 | static void __exit sas_transport_exit(void) | |
808 | { | |
809 | transport_class_unregister(&sas_host_class); | |
810 | transport_class_unregister(&sas_phy_class); | |
811 | transport_class_unregister(&sas_rphy_class); | |
812 | } | |
813 | ||
814 | MODULE_AUTHOR("Christoph Hellwig"); | |
815 | MODULE_DESCRIPTION("SAS Transphy Attributes"); | |
816 | MODULE_LICENSE("GPL"); | |
817 | ||
818 | module_init(sas_transport_init); | |
819 | module_exit(sas_transport_exit); |