Commit | Line | Data |
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c7ebbbce | 1 | /* |
a0125641 | 2 | * Copyright (C) 2005-2006 Dell Inc. |
c7ebbbce CH |
3 | * Released under GPL v2. |
4 | * | |
5 | * Serial Attached SCSI (SAS) transport class. | |
6 | * | |
7 | * The SAS transport class contains common code to deal with SAS HBAs, | |
8 | * an aproximated representation of SAS topologies in the driver model, | |
b1c11812 | 9 | * and various sysfs attributes to expose these topologies and management |
c7ebbbce CH |
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> | |
f6a57033 | 28 | #include <linux/jiffies.h> |
c7ebbbce | 29 | #include <linux/err.h> |
8c65b4a6 TS |
30 | #include <linux/slab.h> |
31 | #include <linux/string.h> | |
7aa68e80 FT |
32 | #include <linux/blkdev.h> |
33 | #include <linux/bsg.h> | |
c7ebbbce | 34 | |
e02f3f59 | 35 | #include <scsi/scsi.h> |
c7ebbbce CH |
36 | #include <scsi/scsi_device.h> |
37 | #include <scsi/scsi_host.h> | |
38 | #include <scsi/scsi_transport.h> | |
39 | #include <scsi/scsi_transport_sas.h> | |
40 | ||
d6159c17 | 41 | #include "scsi_sas_internal.h" |
c7ebbbce CH |
42 | struct sas_host_attrs { |
43 | struct list_head rphy_list; | |
e02f3f59 | 44 | struct mutex lock; |
b6aff669 | 45 | struct request_queue *q; |
c7ebbbce | 46 | u32 next_target_id; |
79cb1819 | 47 | u32 next_expander_id; |
c9fefeb2 | 48 | int next_port_id; |
c7ebbbce CH |
49 | }; |
50 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) | |
51 | ||
52 | ||
53 | /* | |
54 | * Hack to allow attributes of the same name in different objects. | |
55 | */ | |
ee959b00 TJ |
56 | #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
57 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
c7ebbbce CH |
58 | __ATTR(_name,_mode,_show,_store) |
59 | ||
60 | ||
61 | /* | |
62 | * Pretty printing helpers | |
63 | */ | |
64 | ||
65 | #define sas_bitfield_name_match(title, table) \ | |
66 | static ssize_t \ | |
67 | get_sas_##title##_names(u32 table_key, char *buf) \ | |
68 | { \ | |
69 | char *prefix = ""; \ | |
70 | ssize_t len = 0; \ | |
71 | int i; \ | |
72 | \ | |
6391a113 | 73 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
c7ebbbce CH |
74 | if (table[i].value & table_key) { \ |
75 | len += sprintf(buf + len, "%s%s", \ | |
76 | prefix, table[i].name); \ | |
77 | prefix = ", "; \ | |
78 | } \ | |
79 | } \ | |
80 | len += sprintf(buf + len, "\n"); \ | |
81 | return len; \ | |
82 | } | |
83 | ||
d24e1eeb JB |
84 | #define sas_bitfield_name_set(title, table) \ |
85 | static ssize_t \ | |
86 | set_sas_##title##_names(u32 *table_key, const char *buf) \ | |
87 | { \ | |
88 | ssize_t len = 0; \ | |
89 | int i; \ | |
90 | \ | |
91 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ | |
92 | len = strlen(table[i].name); \ | |
93 | if (strncmp(buf, table[i].name, len) == 0 && \ | |
94 | (buf[len] == '\n' || buf[len] == '\0')) { \ | |
95 | *table_key = table[i].value; \ | |
96 | return 0; \ | |
97 | } \ | |
98 | } \ | |
99 | return -EINVAL; \ | |
100 | } | |
101 | ||
c7ebbbce CH |
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 | \ | |
6391a113 | 109 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
c7ebbbce CH |
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" }, | |
7e6dff62 | 153 | { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" }, |
c7ebbbce CH |
154 | }; |
155 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) | |
d24e1eeb | 156 | sas_bitfield_name_set(linkspeed, sas_linkspeed_names) |
c7ebbbce | 157 | |
0f88009d JB |
158 | static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev) |
159 | { | |
160 | struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target); | |
161 | struct sas_end_device *rdev; | |
162 | ||
163 | BUG_ON(rphy->identify.device_type != SAS_END_DEVICE); | |
164 | ||
165 | rdev = rphy_to_end_device(rphy); | |
166 | return rdev; | |
167 | } | |
168 | ||
7aa68e80 FT |
169 | static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost, |
170 | struct sas_rphy *rphy) | |
171 | { | |
172 | struct request *req; | |
173 | int ret; | |
174 | int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *); | |
175 | ||
7eaceacc | 176 | while ((req = blk_fetch_request(q)) != NULL) { |
7aa68e80 FT |
177 | spin_unlock_irq(q->queue_lock); |
178 | ||
179 | handler = to_sas_internal(shost->transportt)->f->smp_handler; | |
180 | ret = handler(shost, rphy, req); | |
2d507a01 | 181 | req->errors = ret; |
7aa68e80 | 182 | |
93bdcba5 | 183 | blk_end_request_all(req, ret); |
7aa68e80 | 184 | |
93bdcba5 | 185 | spin_lock_irq(q->queue_lock); |
7aa68e80 FT |
186 | } |
187 | } | |
188 | ||
189 | static void sas_host_smp_request(struct request_queue *q) | |
190 | { | |
191 | sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL); | |
192 | } | |
193 | ||
194 | static void sas_non_host_smp_request(struct request_queue *q) | |
195 | { | |
196 | struct sas_rphy *rphy = q->queuedata; | |
197 | sas_smp_request(q, rphy_to_shost(rphy), rphy); | |
198 | } | |
199 | ||
93c20a59 FT |
200 | static void sas_host_release(struct device *dev) |
201 | { | |
202 | struct Scsi_Host *shost = dev_to_shost(dev); | |
203 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
204 | struct request_queue *q = sas_host->q; | |
205 | ||
206 | if (q) | |
207 | blk_cleanup_queue(q); | |
208 | } | |
209 | ||
39dca558 | 210 | static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy) |
7aa68e80 FT |
211 | { |
212 | struct request_queue *q; | |
213 | int error; | |
39dca558 | 214 | struct device *dev; |
71610f55 | 215 | char namebuf[20]; |
39dca558 | 216 | const char *name; |
93c20a59 | 217 | void (*release)(struct device *); |
7aa68e80 FT |
218 | |
219 | if (!to_sas_internal(shost->transportt)->f->smp_handler) { | |
220 | printk("%s can't handle SMP requests\n", shost->hostt->name); | |
221 | return 0; | |
222 | } | |
223 | ||
39dca558 | 224 | if (rphy) { |
7aa68e80 | 225 | q = blk_init_queue(sas_non_host_smp_request, NULL); |
39dca558 | 226 | dev = &rphy->dev; |
71610f55 | 227 | name = dev_name(dev); |
93c20a59 | 228 | release = NULL; |
39dca558 | 229 | } else { |
7aa68e80 | 230 | q = blk_init_queue(sas_host_smp_request, NULL); |
39dca558 JB |
231 | dev = &shost->shost_gendev; |
232 | snprintf(namebuf, sizeof(namebuf), | |
233 | "sas_host%d", shost->host_no); | |
234 | name = namebuf; | |
93c20a59 | 235 | release = sas_host_release; |
39dca558 | 236 | } |
7aa68e80 FT |
237 | if (!q) |
238 | return -ENOMEM; | |
239 | ||
93c20a59 | 240 | error = bsg_register_queue(q, dev, name, release); |
7aa68e80 FT |
241 | if (error) { |
242 | blk_cleanup_queue(q); | |
243 | return -ENOMEM; | |
244 | } | |
245 | ||
b6aff669 JB |
246 | if (rphy) |
247 | rphy->q = q; | |
248 | else | |
249 | to_sas_host_attrs(shost)->q = q; | |
250 | ||
7aa68e80 FT |
251 | if (rphy) |
252 | q->queuedata = rphy; | |
253 | else | |
254 | q->queuedata = shost; | |
255 | ||
75ad23bc | 256 | queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); |
7aa68e80 FT |
257 | return 0; |
258 | } | |
259 | ||
b6aff669 JB |
260 | static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy) |
261 | { | |
262 | struct request_queue *q; | |
263 | ||
264 | if (rphy) | |
265 | q = rphy->q; | |
266 | else | |
267 | q = to_sas_host_attrs(shost)->q; | |
268 | ||
269 | if (!q) | |
270 | return; | |
271 | ||
272 | bsg_unregister_queue(q); | |
b6aff669 JB |
273 | } |
274 | ||
c7ebbbce CH |
275 | /* |
276 | * SAS host attributes | |
277 | */ | |
278 | ||
37be6eeb | 279 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 280 | struct device *cdev) |
c7ebbbce CH |
281 | { |
282 | struct Scsi_Host *shost = dev_to_shost(dev); | |
283 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
284 | ||
285 | INIT_LIST_HEAD(&sas_host->rphy_list); | |
e02f3f59 | 286 | mutex_init(&sas_host->lock); |
c7ebbbce | 287 | sas_host->next_target_id = 0; |
79cb1819 | 288 | sas_host->next_expander_id = 0; |
c9fefeb2 | 289 | sas_host->next_port_id = 0; |
7aa68e80 | 290 | |
39dca558 | 291 | if (sas_bsg_initialize(shost, NULL)) |
7aa68e80 FT |
292 | dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n", |
293 | shost->host_no); | |
294 | ||
c7ebbbce CH |
295 | return 0; |
296 | } | |
297 | ||
b6aff669 | 298 | static int sas_host_remove(struct transport_container *tc, struct device *dev, |
ee959b00 | 299 | struct device *cdev) |
b6aff669 JB |
300 | { |
301 | struct Scsi_Host *shost = dev_to_shost(dev); | |
302 | ||
303 | sas_bsg_remove(shost, NULL); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
c7ebbbce | 308 | static DECLARE_TRANSPORT_CLASS(sas_host_class, |
b6aff669 | 309 | "sas_host", sas_host_setup, sas_host_remove, NULL); |
c7ebbbce CH |
310 | |
311 | static int sas_host_match(struct attribute_container *cont, | |
312 | struct device *dev) | |
313 | { | |
314 | struct Scsi_Host *shost; | |
315 | struct sas_internal *i; | |
316 | ||
317 | if (!scsi_is_host_device(dev)) | |
318 | return 0; | |
319 | shost = dev_to_shost(dev); | |
320 | ||
321 | if (!shost->transportt) | |
322 | return 0; | |
323 | if (shost->transportt->host_attrs.ac.class != | |
324 | &sas_host_class.class) | |
325 | return 0; | |
326 | ||
327 | i = to_sas_internal(shost->transportt); | |
328 | return &i->t.host_attrs.ac == cont; | |
329 | } | |
330 | ||
331 | static int do_sas_phy_delete(struct device *dev, void *data) | |
332 | { | |
65c92b09 JB |
333 | int pass = (int)(unsigned long)data; |
334 | ||
335 | if (pass == 0 && scsi_is_sas_port(dev)) | |
336 | sas_port_delete(dev_to_sas_port(dev)); | |
337 | else if (pass == 1 && scsi_is_sas_phy(dev)) | |
c7ebbbce CH |
338 | sas_phy_delete(dev_to_phy(dev)); |
339 | return 0; | |
340 | } | |
341 | ||
65c92b09 | 342 | /** |
eb44820c | 343 | * sas_remove_children - tear down a devices SAS data structures |
65c92b09 JB |
344 | * @dev: device belonging to the sas object |
345 | * | |
346 | * Removes all SAS PHYs and remote PHYs for a given object | |
347 | */ | |
348 | void sas_remove_children(struct device *dev) | |
349 | { | |
350 | device_for_each_child(dev, (void *)0, do_sas_phy_delete); | |
351 | device_for_each_child(dev, (void *)1, do_sas_phy_delete); | |
352 | } | |
353 | EXPORT_SYMBOL(sas_remove_children); | |
354 | ||
c7ebbbce | 355 | /** |
eb44820c | 356 | * sas_remove_host - tear down a Scsi_Host's SAS data structures |
c7ebbbce CH |
357 | * @shost: Scsi Host that is torn down |
358 | * | |
359 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host. | |
360 | * Must be called just before scsi_remove_host for SAS HBAs. | |
361 | */ | |
362 | void sas_remove_host(struct Scsi_Host *shost) | |
363 | { | |
65c92b09 | 364 | sas_remove_children(&shost->shost_gendev); |
c7ebbbce CH |
365 | } |
366 | EXPORT_SYMBOL(sas_remove_host); | |
367 | ||
0f88009d JB |
368 | /** |
369 | * sas_tlr_supported - checking TLR bit in vpd 0x90 | |
370 | * @sdev: scsi device struct | |
371 | * | |
372 | * Check Transport Layer Retries are supported or not. | |
373 | * If vpd page 0x90 is present, TRL is supported. | |
374 | * | |
375 | */ | |
376 | unsigned int | |
377 | sas_tlr_supported(struct scsi_device *sdev) | |
378 | { | |
379 | const int vpd_len = 32; | |
380 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); | |
381 | char *buffer = kzalloc(vpd_len, GFP_KERNEL); | |
382 | int ret = 0; | |
383 | ||
384 | if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len)) | |
385 | goto out; | |
386 | ||
387 | /* | |
388 | * Magic numbers: the VPD Protocol page (0x90) | |
389 | * has a 4 byte header and then one entry per device port | |
390 | * the TLR bit is at offset 8 on each port entry | |
391 | * if we take the first port, that's at total offset 12 | |
392 | */ | |
393 | ret = buffer[12] & 0x01; | |
394 | ||
395 | out: | |
396 | kfree(buffer); | |
397 | rdev->tlr_supported = ret; | |
398 | return ret; | |
399 | ||
400 | } | |
401 | EXPORT_SYMBOL_GPL(sas_tlr_supported); | |
402 | ||
403 | /** | |
404 | * sas_disable_tlr - setting TLR flags | |
405 | * @sdev: scsi device struct | |
406 | * | |
407 | * Seting tlr_enabled flag to 0. | |
408 | * | |
409 | */ | |
410 | void | |
411 | sas_disable_tlr(struct scsi_device *sdev) | |
412 | { | |
413 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); | |
414 | ||
415 | rdev->tlr_enabled = 0; | |
416 | } | |
417 | EXPORT_SYMBOL_GPL(sas_disable_tlr); | |
418 | ||
419 | /** | |
420 | * sas_enable_tlr - setting TLR flags | |
421 | * @sdev: scsi device struct | |
422 | * | |
423 | * Seting tlr_enabled flag 1. | |
424 | * | |
425 | */ | |
426 | void sas_enable_tlr(struct scsi_device *sdev) | |
427 | { | |
428 | unsigned int tlr_supported = 0; | |
429 | tlr_supported = sas_tlr_supported(sdev); | |
430 | ||
431 | if (tlr_supported) { | |
432 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); | |
433 | ||
434 | rdev->tlr_enabled = 1; | |
435 | } | |
436 | ||
437 | return; | |
438 | } | |
439 | EXPORT_SYMBOL_GPL(sas_enable_tlr); | |
440 | ||
441 | unsigned int sas_is_tlr_enabled(struct scsi_device *sdev) | |
442 | { | |
443 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); | |
444 | return rdev->tlr_enabled; | |
445 | } | |
446 | EXPORT_SYMBOL_GPL(sas_is_tlr_enabled); | |
c7ebbbce CH |
447 | |
448 | /* | |
65c92b09 | 449 | * SAS Phy attributes |
c7ebbbce CH |
450 | */ |
451 | ||
452 | #define sas_phy_show_simple(field, name, format_string, cast) \ | |
453 | static ssize_t \ | |
ee959b00 TJ |
454 | show_sas_phy_##name(struct device *dev, \ |
455 | struct device_attribute *attr, char *buf) \ | |
c7ebbbce | 456 | { \ |
ee959b00 | 457 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
c7ebbbce CH |
458 | \ |
459 | return snprintf(buf, 20, format_string, cast phy->field); \ | |
460 | } | |
461 | ||
462 | #define sas_phy_simple_attr(field, name, format_string, type) \ | |
463 | sas_phy_show_simple(field, name, format_string, (type)) \ | |
ee959b00 | 464 | static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) |
c7ebbbce CH |
465 | |
466 | #define sas_phy_show_protocol(field, name) \ | |
467 | static ssize_t \ | |
ee959b00 TJ |
468 | show_sas_phy_##name(struct device *dev, \ |
469 | struct device_attribute *attr, char *buf) \ | |
c7ebbbce | 470 | { \ |
ee959b00 | 471 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
c7ebbbce CH |
472 | \ |
473 | if (!phy->field) \ | |
474 | return snprintf(buf, 20, "none\n"); \ | |
475 | return get_sas_protocol_names(phy->field, buf); \ | |
476 | } | |
477 | ||
478 | #define sas_phy_protocol_attr(field, name) \ | |
479 | sas_phy_show_protocol(field, name) \ | |
ee959b00 | 480 | static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) |
c7ebbbce CH |
481 | |
482 | #define sas_phy_show_linkspeed(field) \ | |
483 | static ssize_t \ | |
ee959b00 TJ |
484 | show_sas_phy_##field(struct device *dev, \ |
485 | struct device_attribute *attr, char *buf) \ | |
c7ebbbce | 486 | { \ |
ee959b00 | 487 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
c7ebbbce CH |
488 | \ |
489 | return get_sas_linkspeed_names(phy->field, buf); \ | |
490 | } | |
491 | ||
d24e1eeb JB |
492 | /* Fudge to tell if we're minimum or maximum */ |
493 | #define sas_phy_store_linkspeed(field) \ | |
494 | static ssize_t \ | |
ee959b00 TJ |
495 | store_sas_phy_##field(struct device *dev, \ |
496 | struct device_attribute *attr, \ | |
497 | const char *buf, size_t count) \ | |
d24e1eeb | 498 | { \ |
ee959b00 | 499 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
d24e1eeb JB |
500 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ |
501 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
502 | u32 value; \ | |
503 | struct sas_phy_linkrates rates = {0}; \ | |
504 | int error; \ | |
505 | \ | |
506 | error = set_sas_linkspeed_names(&value, buf); \ | |
507 | if (error) \ | |
508 | return error; \ | |
509 | rates.field = value; \ | |
510 | error = i->f->set_phy_speed(phy, &rates); \ | |
511 | \ | |
512 | return error ? error : count; \ | |
513 | } | |
514 | ||
515 | #define sas_phy_linkspeed_rw_attr(field) \ | |
516 | sas_phy_show_linkspeed(field) \ | |
517 | sas_phy_store_linkspeed(field) \ | |
ee959b00 | 518 | static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \ |
d24e1eeb JB |
519 | store_sas_phy_##field) |
520 | ||
c7ebbbce CH |
521 | #define sas_phy_linkspeed_attr(field) \ |
522 | sas_phy_show_linkspeed(field) \ | |
ee959b00 | 523 | static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) |
c7ebbbce | 524 | |
d24e1eeb | 525 | |
c3ee74c4 CH |
526 | #define sas_phy_show_linkerror(field) \ |
527 | static ssize_t \ | |
ee959b00 TJ |
528 | show_sas_phy_##field(struct device *dev, \ |
529 | struct device_attribute *attr, char *buf) \ | |
c3ee74c4 | 530 | { \ |
ee959b00 | 531 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
c3ee74c4 CH |
532 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ |
533 | struct sas_internal *i = to_sas_internal(shost->transportt); \ | |
534 | int error; \ | |
535 | \ | |
dd9fbb52 | 536 | error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \ |
c3ee74c4 CH |
537 | if (error) \ |
538 | return error; \ | |
539 | return snprintf(buf, 20, "%u\n", phy->field); \ | |
540 | } | |
541 | ||
542 | #define sas_phy_linkerror_attr(field) \ | |
543 | sas_phy_show_linkerror(field) \ | |
ee959b00 | 544 | static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) |
c3ee74c4 CH |
545 | |
546 | ||
c7ebbbce | 547 | static ssize_t |
ee959b00 TJ |
548 | show_sas_device_type(struct device *dev, |
549 | struct device_attribute *attr, char *buf) | |
c7ebbbce | 550 | { |
ee959b00 | 551 | struct sas_phy *phy = transport_class_to_phy(dev); |
c7ebbbce CH |
552 | |
553 | if (!phy->identify.device_type) | |
554 | return snprintf(buf, 20, "none\n"); | |
555 | return get_sas_device_type_names(phy->identify.device_type, buf); | |
556 | } | |
ee959b00 | 557 | static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
c7ebbbce | 558 | |
ee959b00 | 559 | static ssize_t do_sas_phy_enable(struct device *dev, |
acbf167d DW |
560 | size_t count, int enable) |
561 | { | |
ee959b00 | 562 | struct sas_phy *phy = transport_class_to_phy(dev); |
acbf167d DW |
563 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); |
564 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
565 | int error; | |
566 | ||
567 | error = i->f->phy_enable(phy, enable); | |
568 | if (error) | |
569 | return error; | |
570 | phy->enabled = enable; | |
571 | return count; | |
572 | }; | |
573 | ||
ee959b00 TJ |
574 | static ssize_t |
575 | store_sas_phy_enable(struct device *dev, struct device_attribute *attr, | |
576 | const char *buf, size_t count) | |
acbf167d DW |
577 | { |
578 | if (count < 1) | |
579 | return -EINVAL; | |
580 | ||
581 | switch (buf[0]) { | |
582 | case '0': | |
ee959b00 | 583 | do_sas_phy_enable(dev, count, 0); |
acbf167d DW |
584 | break; |
585 | case '1': | |
ee959b00 | 586 | do_sas_phy_enable(dev, count, 1); |
acbf167d DW |
587 | break; |
588 | default: | |
589 | return -EINVAL; | |
590 | } | |
591 | ||
592 | return count; | |
593 | } | |
594 | ||
ee959b00 TJ |
595 | static ssize_t |
596 | show_sas_phy_enable(struct device *dev, struct device_attribute *attr, | |
597 | char *buf) | |
acbf167d | 598 | { |
ee959b00 | 599 | struct sas_phy *phy = transport_class_to_phy(dev); |
acbf167d DW |
600 | |
601 | return snprintf(buf, 20, "%d", phy->enabled); | |
602 | } | |
603 | ||
ee959b00 | 604 | static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable, |
acbf167d DW |
605 | store_sas_phy_enable); |
606 | ||
ee959b00 TJ |
607 | static ssize_t |
608 | do_sas_phy_reset(struct device *dev, size_t count, int hard_reset) | |
07ba3a95 | 609 | { |
ee959b00 | 610 | struct sas_phy *phy = transport_class_to_phy(dev); |
07ba3a95 CH |
611 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); |
612 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
613 | int error; | |
614 | ||
07ba3a95 CH |
615 | error = i->f->phy_reset(phy, hard_reset); |
616 | if (error) | |
617 | return error; | |
618 | return count; | |
619 | }; | |
620 | ||
ee959b00 TJ |
621 | static ssize_t |
622 | store_sas_link_reset(struct device *dev, struct device_attribute *attr, | |
623 | const char *buf, size_t count) | |
07ba3a95 | 624 | { |
ee959b00 | 625 | return do_sas_phy_reset(dev, count, 0); |
07ba3a95 | 626 | } |
ee959b00 | 627 | static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); |
07ba3a95 | 628 | |
ee959b00 TJ |
629 | static ssize_t |
630 | store_sas_hard_reset(struct device *dev, struct device_attribute *attr, | |
631 | const char *buf, size_t count) | |
07ba3a95 | 632 | { |
ee959b00 | 633 | return do_sas_phy_reset(dev, count, 1); |
07ba3a95 | 634 | } |
ee959b00 | 635 | static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); |
07ba3a95 | 636 | |
c7ebbbce CH |
637 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
638 | initiator_port_protocols); | |
639 | sas_phy_protocol_attr(identify.target_port_protocols, | |
640 | target_port_protocols); | |
641 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
642 | unsigned long long); | |
643 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
c9fefeb2 | 644 | //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int); |
c7ebbbce CH |
645 | sas_phy_linkspeed_attr(negotiated_linkrate); |
646 | sas_phy_linkspeed_attr(minimum_linkrate_hw); | |
d24e1eeb | 647 | sas_phy_linkspeed_rw_attr(minimum_linkrate); |
c7ebbbce | 648 | sas_phy_linkspeed_attr(maximum_linkrate_hw); |
d24e1eeb | 649 | sas_phy_linkspeed_rw_attr(maximum_linkrate); |
c3ee74c4 CH |
650 | sas_phy_linkerror_attr(invalid_dword_count); |
651 | sas_phy_linkerror_attr(running_disparity_error_count); | |
652 | sas_phy_linkerror_attr(loss_of_dword_sync_count); | |
653 | sas_phy_linkerror_attr(phy_reset_problem_count); | |
c7ebbbce CH |
654 | |
655 | ||
656 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, | |
657 | "sas_phy", NULL, NULL, NULL); | |
658 | ||
659 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) | |
660 | { | |
661 | struct Scsi_Host *shost; | |
662 | struct sas_internal *i; | |
663 | ||
664 | if (!scsi_is_sas_phy(dev)) | |
665 | return 0; | |
666 | shost = dev_to_shost(dev->parent); | |
667 | ||
668 | if (!shost->transportt) | |
669 | return 0; | |
670 | if (shost->transportt->host_attrs.ac.class != | |
671 | &sas_host_class.class) | |
672 | return 0; | |
673 | ||
674 | i = to_sas_internal(shost->transportt); | |
675 | return &i->phy_attr_cont.ac == cont; | |
676 | } | |
677 | ||
678 | static void sas_phy_release(struct device *dev) | |
679 | { | |
680 | struct sas_phy *phy = dev_to_phy(dev); | |
681 | ||
682 | put_device(dev->parent); | |
683 | kfree(phy); | |
684 | } | |
685 | ||
686 | /** | |
eb44820c | 687 | * sas_phy_alloc - allocates and initialize a SAS PHY structure |
c7ebbbce | 688 | * @parent: Parent device |
d99ca418 | 689 | * @number: Phy index |
c7ebbbce CH |
690 | * |
691 | * Allocates an SAS PHY structure. It will be added in the device tree | |
692 | * below the device specified by @parent, which has to be either a Scsi_Host | |
693 | * or sas_rphy. | |
694 | * | |
695 | * Returns: | |
696 | * SAS PHY allocated or %NULL if the allocation failed. | |
697 | */ | |
698 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) | |
699 | { | |
700 | struct Scsi_Host *shost = dev_to_shost(parent); | |
701 | struct sas_phy *phy; | |
702 | ||
24669f75 | 703 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); |
c7ebbbce CH |
704 | if (!phy) |
705 | return NULL; | |
c7ebbbce | 706 | |
c7ebbbce | 707 | phy->number = number; |
acbf167d | 708 | phy->enabled = 1; |
c7ebbbce CH |
709 | |
710 | device_initialize(&phy->dev); | |
711 | phy->dev.parent = get_device(parent); | |
712 | phy->dev.release = sas_phy_release; | |
65c92b09 | 713 | INIT_LIST_HEAD(&phy->port_siblings); |
79cb1819 JB |
714 | if (scsi_is_sas_expander_device(parent)) { |
715 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
71610f55 | 716 | dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no, |
79cb1819 JB |
717 | rphy->scsi_target_id, number); |
718 | } else | |
71610f55 | 719 | dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number); |
c7ebbbce CH |
720 | |
721 | transport_setup_device(&phy->dev); | |
722 | ||
723 | return phy; | |
724 | } | |
725 | EXPORT_SYMBOL(sas_phy_alloc); | |
726 | ||
727 | /** | |
eb44820c | 728 | * sas_phy_add - add a SAS PHY to the device hierarchy |
c7ebbbce CH |
729 | * @phy: The PHY to be added |
730 | * | |
731 | * Publishes a SAS PHY to the rest of the system. | |
732 | */ | |
733 | int sas_phy_add(struct sas_phy *phy) | |
734 | { | |
735 | int error; | |
736 | ||
737 | error = device_add(&phy->dev); | |
738 | if (!error) { | |
739 | transport_add_device(&phy->dev); | |
740 | transport_configure_device(&phy->dev); | |
741 | } | |
742 | ||
743 | return error; | |
744 | } | |
745 | EXPORT_SYMBOL(sas_phy_add); | |
746 | ||
747 | /** | |
eb44820c | 748 | * sas_phy_free - free a SAS PHY |
c7ebbbce CH |
749 | * @phy: SAS PHY to free |
750 | * | |
751 | * Frees the specified SAS PHY. | |
752 | * | |
753 | * Note: | |
754 | * This function must only be called on a PHY that has not | |
af901ca1 | 755 | * successfully been added using sas_phy_add(). |
c7ebbbce CH |
756 | */ |
757 | void sas_phy_free(struct sas_phy *phy) | |
758 | { | |
759 | transport_destroy_device(&phy->dev); | |
92aab646 | 760 | put_device(&phy->dev); |
c7ebbbce CH |
761 | } |
762 | EXPORT_SYMBOL(sas_phy_free); | |
763 | ||
764 | /** | |
eb44820c | 765 | * sas_phy_delete - remove SAS PHY |
c7ebbbce CH |
766 | * @phy: SAS PHY to remove |
767 | * | |
768 | * Removes the specified SAS PHY. If the SAS PHY has an | |
769 | * associated remote PHY it is removed before. | |
770 | */ | |
771 | void | |
772 | sas_phy_delete(struct sas_phy *phy) | |
773 | { | |
774 | struct device *dev = &phy->dev; | |
775 | ||
65c92b09 JB |
776 | /* this happens if the phy is still part of a port when deleted */ |
777 | BUG_ON(!list_empty(&phy->port_siblings)); | |
c7ebbbce CH |
778 | |
779 | transport_remove_device(dev); | |
780 | device_del(dev); | |
781 | transport_destroy_device(dev); | |
92aab646 | 782 | put_device(dev); |
c7ebbbce CH |
783 | } |
784 | EXPORT_SYMBOL(sas_phy_delete); | |
785 | ||
786 | /** | |
eb44820c | 787 | * scsi_is_sas_phy - check if a struct device represents a SAS PHY |
c7ebbbce CH |
788 | * @dev: device to check |
789 | * | |
790 | * Returns: | |
791 | * %1 if the device represents a SAS PHY, %0 else | |
792 | */ | |
793 | int scsi_is_sas_phy(const struct device *dev) | |
794 | { | |
795 | return dev->release == sas_phy_release; | |
796 | } | |
797 | EXPORT_SYMBOL(scsi_is_sas_phy); | |
798 | ||
65c92b09 JB |
799 | /* |
800 | * SAS Port attributes | |
801 | */ | |
802 | #define sas_port_show_simple(field, name, format_string, cast) \ | |
803 | static ssize_t \ | |
ee959b00 TJ |
804 | show_sas_port_##name(struct device *dev, \ |
805 | struct device_attribute *attr, char *buf) \ | |
65c92b09 | 806 | { \ |
ee959b00 | 807 | struct sas_port *port = transport_class_to_sas_port(dev); \ |
65c92b09 JB |
808 | \ |
809 | return snprintf(buf, 20, format_string, cast port->field); \ | |
810 | } | |
811 | ||
812 | #define sas_port_simple_attr(field, name, format_string, type) \ | |
813 | sas_port_show_simple(field, name, format_string, (type)) \ | |
ee959b00 | 814 | static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL) |
65c92b09 JB |
815 | |
816 | sas_port_simple_attr(num_phys, num_phys, "%d\n", int); | |
817 | ||
818 | static DECLARE_TRANSPORT_CLASS(sas_port_class, | |
819 | "sas_port", NULL, NULL, NULL); | |
820 | ||
821 | static int sas_port_match(struct attribute_container *cont, struct device *dev) | |
822 | { | |
823 | struct Scsi_Host *shost; | |
824 | struct sas_internal *i; | |
825 | ||
826 | if (!scsi_is_sas_port(dev)) | |
827 | return 0; | |
828 | shost = dev_to_shost(dev->parent); | |
829 | ||
830 | if (!shost->transportt) | |
831 | return 0; | |
832 | if (shost->transportt->host_attrs.ac.class != | |
833 | &sas_host_class.class) | |
834 | return 0; | |
835 | ||
836 | i = to_sas_internal(shost->transportt); | |
837 | return &i->port_attr_cont.ac == cont; | |
838 | } | |
839 | ||
840 | ||
841 | static void sas_port_release(struct device *dev) | |
842 | { | |
843 | struct sas_port *port = dev_to_sas_port(dev); | |
844 | ||
845 | BUG_ON(!list_empty(&port->phy_list)); | |
846 | ||
847 | put_device(dev->parent); | |
848 | kfree(port); | |
849 | } | |
850 | ||
851 | static void sas_port_create_link(struct sas_port *port, | |
852 | struct sas_phy *phy) | |
853 | { | |
21434966 DW |
854 | int res; |
855 | ||
856 | res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj, | |
71610f55 | 857 | dev_name(&phy->dev)); |
21434966 DW |
858 | if (res) |
859 | goto err; | |
860 | res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port"); | |
861 | if (res) | |
862 | goto err; | |
863 | return; | |
864 | err: | |
865 | printk(KERN_ERR "%s: Cannot create port links, err=%d\n", | |
cadbd4a5 | 866 | __func__, res); |
65c92b09 JB |
867 | } |
868 | ||
869 | static void sas_port_delete_link(struct sas_port *port, | |
870 | struct sas_phy *phy) | |
871 | { | |
71610f55 | 872 | sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev)); |
65c92b09 JB |
873 | sysfs_remove_link(&phy->dev.kobj, "port"); |
874 | } | |
875 | ||
876 | /** sas_port_alloc - allocate and initialize a SAS port structure | |
877 | * | |
878 | * @parent: parent device | |
879 | * @port_id: port number | |
880 | * | |
881 | * Allocates a SAS port structure. It will be added to the device tree | |
882 | * below the device specified by @parent which must be either a Scsi_Host | |
883 | * or a sas_expander_device. | |
884 | * | |
885 | * Returns %NULL on error | |
886 | */ | |
887 | struct sas_port *sas_port_alloc(struct device *parent, int port_id) | |
888 | { | |
889 | struct Scsi_Host *shost = dev_to_shost(parent); | |
890 | struct sas_port *port; | |
891 | ||
892 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
893 | if (!port) | |
894 | return NULL; | |
895 | ||
896 | port->port_identifier = port_id; | |
897 | ||
898 | device_initialize(&port->dev); | |
899 | ||
900 | port->dev.parent = get_device(parent); | |
901 | port->dev.release = sas_port_release; | |
902 | ||
903 | mutex_init(&port->phy_list_mutex); | |
904 | INIT_LIST_HEAD(&port->phy_list); | |
905 | ||
906 | if (scsi_is_sas_expander_device(parent)) { | |
907 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
71610f55 KS |
908 | dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no, |
909 | rphy->scsi_target_id, port->port_identifier); | |
65c92b09 | 910 | } else |
71610f55 KS |
911 | dev_set_name(&port->dev, "port-%d:%d", shost->host_no, |
912 | port->port_identifier); | |
65c92b09 JB |
913 | |
914 | transport_setup_device(&port->dev); | |
915 | ||
916 | return port; | |
917 | } | |
918 | EXPORT_SYMBOL(sas_port_alloc); | |
919 | ||
c9fefeb2 JB |
920 | /** sas_port_alloc_num - allocate and initialize a SAS port structure |
921 | * | |
922 | * @parent: parent device | |
923 | * | |
924 | * Allocates a SAS port structure and a number to go with it. This | |
925 | * interface is really for adapters where the port number has no | |
926 | * meansing, so the sas class should manage them. It will be added to | |
927 | * the device tree below the device specified by @parent which must be | |
928 | * either a Scsi_Host or a sas_expander_device. | |
929 | * | |
930 | * Returns %NULL on error | |
931 | */ | |
932 | struct sas_port *sas_port_alloc_num(struct device *parent) | |
933 | { | |
934 | int index; | |
935 | struct Scsi_Host *shost = dev_to_shost(parent); | |
936 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
937 | ||
938 | /* FIXME: use idr for this eventually */ | |
939 | mutex_lock(&sas_host->lock); | |
940 | if (scsi_is_sas_expander_device(parent)) { | |
941 | struct sas_rphy *rphy = dev_to_rphy(parent); | |
942 | struct sas_expander_device *exp = rphy_to_expander_device(rphy); | |
943 | ||
944 | index = exp->next_port_id++; | |
945 | } else | |
946 | index = sas_host->next_port_id++; | |
947 | mutex_unlock(&sas_host->lock); | |
948 | return sas_port_alloc(parent, index); | |
949 | } | |
950 | EXPORT_SYMBOL(sas_port_alloc_num); | |
951 | ||
65c92b09 JB |
952 | /** |
953 | * sas_port_add - add a SAS port to the device hierarchy | |
65c92b09 JB |
954 | * @port: port to be added |
955 | * | |
956 | * publishes a port to the rest of the system | |
957 | */ | |
958 | int sas_port_add(struct sas_port *port) | |
959 | { | |
960 | int error; | |
961 | ||
962 | /* No phys should be added until this is made visible */ | |
963 | BUG_ON(!list_empty(&port->phy_list)); | |
964 | ||
965 | error = device_add(&port->dev); | |
966 | ||
967 | if (error) | |
968 | return error; | |
969 | ||
970 | transport_add_device(&port->dev); | |
971 | transport_configure_device(&port->dev); | |
972 | ||
973 | return 0; | |
974 | } | |
975 | EXPORT_SYMBOL(sas_port_add); | |
976 | ||
977 | /** | |
eb44820c | 978 | * sas_port_free - free a SAS PORT |
65c92b09 JB |
979 | * @port: SAS PORT to free |
980 | * | |
981 | * Frees the specified SAS PORT. | |
982 | * | |
983 | * Note: | |
984 | * This function must only be called on a PORT that has not | |
af901ca1 | 985 | * successfully been added using sas_port_add(). |
65c92b09 JB |
986 | */ |
987 | void sas_port_free(struct sas_port *port) | |
988 | { | |
989 | transport_destroy_device(&port->dev); | |
990 | put_device(&port->dev); | |
991 | } | |
992 | EXPORT_SYMBOL(sas_port_free); | |
993 | ||
994 | /** | |
eb44820c | 995 | * sas_port_delete - remove SAS PORT |
65c92b09 JB |
996 | * @port: SAS PORT to remove |
997 | * | |
998 | * Removes the specified SAS PORT. If the SAS PORT has an | |
999 | * associated phys, unlink them from the port as well. | |
1000 | */ | |
1001 | void sas_port_delete(struct sas_port *port) | |
1002 | { | |
1003 | struct device *dev = &port->dev; | |
1004 | struct sas_phy *phy, *tmp_phy; | |
1005 | ||
1006 | if (port->rphy) { | |
1007 | sas_rphy_delete(port->rphy); | |
1008 | port->rphy = NULL; | |
1009 | } | |
1010 | ||
1011 | mutex_lock(&port->phy_list_mutex); | |
1012 | list_for_each_entry_safe(phy, tmp_phy, &port->phy_list, | |
1013 | port_siblings) { | |
1014 | sas_port_delete_link(port, phy); | |
1015 | list_del_init(&phy->port_siblings); | |
1016 | } | |
1017 | mutex_unlock(&port->phy_list_mutex); | |
1018 | ||
a0e1b6ef JB |
1019 | if (port->is_backlink) { |
1020 | struct device *parent = port->dev.parent; | |
1021 | ||
71610f55 | 1022 | sysfs_remove_link(&port->dev.kobj, dev_name(parent)); |
a0e1b6ef JB |
1023 | port->is_backlink = 0; |
1024 | } | |
1025 | ||
65c92b09 JB |
1026 | transport_remove_device(dev); |
1027 | device_del(dev); | |
1028 | transport_destroy_device(dev); | |
1029 | put_device(dev); | |
1030 | } | |
1031 | EXPORT_SYMBOL(sas_port_delete); | |
1032 | ||
1033 | /** | |
eb44820c | 1034 | * scsi_is_sas_port - check if a struct device represents a SAS port |
65c92b09 JB |
1035 | * @dev: device to check |
1036 | * | |
1037 | * Returns: | |
1038 | * %1 if the device represents a SAS Port, %0 else | |
1039 | */ | |
1040 | int scsi_is_sas_port(const struct device *dev) | |
1041 | { | |
1042 | return dev->release == sas_port_release; | |
1043 | } | |
1044 | EXPORT_SYMBOL(scsi_is_sas_port); | |
1045 | ||
1046 | /** | |
1047 | * sas_port_add_phy - add another phy to a port to form a wide port | |
1048 | * @port: port to add the phy to | |
1049 | * @phy: phy to add | |
1050 | * | |
1051 | * When a port is initially created, it is empty (has no phys). All | |
1052 | * ports must have at least one phy to operated, and all wide ports | |
1053 | * must have at least two. The current code makes no difference | |
1054 | * between ports and wide ports, but the only object that can be | |
1055 | * connected to a remote device is a port, so ports must be formed on | |
1056 | * all devices with phys if they're connected to anything. | |
1057 | */ | |
1058 | void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy) | |
1059 | { | |
1060 | mutex_lock(&port->phy_list_mutex); | |
1061 | if (unlikely(!list_empty(&phy->port_siblings))) { | |
1062 | /* make sure we're already on this port */ | |
1063 | struct sas_phy *tmp; | |
1064 | ||
1065 | list_for_each_entry(tmp, &port->phy_list, port_siblings) | |
1066 | if (tmp == phy) | |
1067 | break; | |
1068 | /* If this trips, you added a phy that was already | |
1069 | * part of a different port */ | |
1070 | if (unlikely(tmp != phy)) { | |
71610f55 KS |
1071 | dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", |
1072 | dev_name(&phy->dev)); | |
65c92b09 JB |
1073 | BUG(); |
1074 | } | |
1075 | } else { | |
1076 | sas_port_create_link(port, phy); | |
1077 | list_add_tail(&phy->port_siblings, &port->phy_list); | |
1078 | port->num_phys++; | |
1079 | } | |
1080 | mutex_unlock(&port->phy_list_mutex); | |
1081 | } | |
1082 | EXPORT_SYMBOL(sas_port_add_phy); | |
1083 | ||
1084 | /** | |
1085 | * sas_port_delete_phy - remove a phy from a port or wide port | |
1086 | * @port: port to remove the phy from | |
1087 | * @phy: phy to remove | |
1088 | * | |
1089 | * This operation is used for tearing down ports again. It must be | |
1090 | * done to every port or wide port before calling sas_port_delete. | |
1091 | */ | |
1092 | void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy) | |
1093 | { | |
1094 | mutex_lock(&port->phy_list_mutex); | |
1095 | sas_port_delete_link(port, phy); | |
1096 | list_del_init(&phy->port_siblings); | |
1097 | port->num_phys--; | |
1098 | mutex_unlock(&port->phy_list_mutex); | |
1099 | } | |
1100 | EXPORT_SYMBOL(sas_port_delete_phy); | |
1101 | ||
a0e1b6ef JB |
1102 | void sas_port_mark_backlink(struct sas_port *port) |
1103 | { | |
21434966 | 1104 | int res; |
a0e1b6ef JB |
1105 | struct device *parent = port->dev.parent->parent->parent; |
1106 | ||
1107 | if (port->is_backlink) | |
1108 | return; | |
1109 | port->is_backlink = 1; | |
21434966 | 1110 | res = sysfs_create_link(&port->dev.kobj, &parent->kobj, |
71610f55 | 1111 | dev_name(parent)); |
21434966 DW |
1112 | if (res) |
1113 | goto err; | |
1114 | return; | |
1115 | err: | |
1116 | printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n", | |
cadbd4a5 | 1117 | __func__, res); |
a0e1b6ef JB |
1118 | |
1119 | } | |
1120 | EXPORT_SYMBOL(sas_port_mark_backlink); | |
1121 | ||
c7ebbbce CH |
1122 | /* |
1123 | * SAS remote PHY attributes. | |
1124 | */ | |
1125 | ||
1126 | #define sas_rphy_show_simple(field, name, format_string, cast) \ | |
1127 | static ssize_t \ | |
ee959b00 TJ |
1128 | show_sas_rphy_##name(struct device *dev, \ |
1129 | struct device_attribute *attr, char *buf) \ | |
c7ebbbce | 1130 | { \ |
ee959b00 | 1131 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
c7ebbbce CH |
1132 | \ |
1133 | return snprintf(buf, 20, format_string, cast rphy->field); \ | |
1134 | } | |
1135 | ||
1136 | #define sas_rphy_simple_attr(field, name, format_string, type) \ | |
1137 | sas_rphy_show_simple(field, name, format_string, (type)) \ | |
ee959b00 | 1138 | static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \ |
c7ebbbce CH |
1139 | show_sas_rphy_##name, NULL) |
1140 | ||
1141 | #define sas_rphy_show_protocol(field, name) \ | |
1142 | static ssize_t \ | |
ee959b00 TJ |
1143 | show_sas_rphy_##name(struct device *dev, \ |
1144 | struct device_attribute *attr, char *buf) \ | |
c7ebbbce | 1145 | { \ |
ee959b00 | 1146 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
c7ebbbce CH |
1147 | \ |
1148 | if (!rphy->field) \ | |
1149 | return snprintf(buf, 20, "none\n"); \ | |
1150 | return get_sas_protocol_names(rphy->field, buf); \ | |
1151 | } | |
1152 | ||
1153 | #define sas_rphy_protocol_attr(field, name) \ | |
1154 | sas_rphy_show_protocol(field, name) \ | |
ee959b00 | 1155 | static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \ |
c7ebbbce CH |
1156 | show_sas_rphy_##name, NULL) |
1157 | ||
1158 | static ssize_t | |
ee959b00 TJ |
1159 | show_sas_rphy_device_type(struct device *dev, |
1160 | struct device_attribute *attr, char *buf) | |
c7ebbbce | 1161 | { |
ee959b00 | 1162 | struct sas_rphy *rphy = transport_class_to_rphy(dev); |
c7ebbbce CH |
1163 | |
1164 | if (!rphy->identify.device_type) | |
1165 | return snprintf(buf, 20, "none\n"); | |
1166 | return get_sas_device_type_names( | |
1167 | rphy->identify.device_type, buf); | |
1168 | } | |
1169 | ||
ee959b00 | 1170 | static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO, |
c7ebbbce CH |
1171 | show_sas_rphy_device_type, NULL); |
1172 | ||
a0125641 | 1173 | static ssize_t |
ee959b00 TJ |
1174 | show_sas_rphy_enclosure_identifier(struct device *dev, |
1175 | struct device_attribute *attr, char *buf) | |
a0125641 | 1176 | { |
ee959b00 | 1177 | struct sas_rphy *rphy = transport_class_to_rphy(dev); |
a0125641 CH |
1178 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); |
1179 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
1180 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
1181 | u64 identifier; | |
1182 | int error; | |
1183 | ||
1184 | /* | |
1185 | * Only devices behind an expander are supported, because the | |
1186 | * enclosure identifier is a SMP feature. | |
1187 | */ | |
f4ad7b58 | 1188 | if (scsi_is_sas_phy_local(phy)) |
a0125641 CH |
1189 | return -EINVAL; |
1190 | ||
1191 | error = i->f->get_enclosure_identifier(rphy, &identifier); | |
1192 | if (error) | |
1193 | return error; | |
1194 | return sprintf(buf, "0x%llx\n", (unsigned long long)identifier); | |
1195 | } | |
1196 | ||
ee959b00 | 1197 | static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO, |
a0125641 CH |
1198 | show_sas_rphy_enclosure_identifier, NULL); |
1199 | ||
1200 | static ssize_t | |
ee959b00 TJ |
1201 | show_sas_rphy_bay_identifier(struct device *dev, |
1202 | struct device_attribute *attr, char *buf) | |
a0125641 | 1203 | { |
ee959b00 | 1204 | struct sas_rphy *rphy = transport_class_to_rphy(dev); |
a0125641 CH |
1205 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); |
1206 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); | |
1207 | struct sas_internal *i = to_sas_internal(shost->transportt); | |
1208 | int val; | |
1209 | ||
f4ad7b58 | 1210 | if (scsi_is_sas_phy_local(phy)) |
a0125641 CH |
1211 | return -EINVAL; |
1212 | ||
1213 | val = i->f->get_bay_identifier(rphy); | |
1214 | if (val < 0) | |
1215 | return val; | |
1216 | return sprintf(buf, "%d\n", val); | |
1217 | } | |
1218 | ||
ee959b00 | 1219 | static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO, |
a0125641 CH |
1220 | show_sas_rphy_bay_identifier, NULL); |
1221 | ||
c7ebbbce CH |
1222 | sas_rphy_protocol_attr(identify.initiator_port_protocols, |
1223 | initiator_port_protocols); | |
1224 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); | |
1225 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n", | |
1226 | unsigned long long); | |
1227 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8); | |
1228 | ||
42ab0360 JB |
1229 | /* only need 8 bytes of data plus header (4 or 8) */ |
1230 | #define BUF_SIZE 64 | |
1231 | ||
1232 | int sas_read_port_mode_page(struct scsi_device *sdev) | |
1233 | { | |
1234 | char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata; | |
0f88009d | 1235 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
42ab0360 JB |
1236 | struct scsi_mode_data mode_data; |
1237 | int res, error; | |
1238 | ||
42ab0360 JB |
1239 | if (!buffer) |
1240 | return -ENOMEM; | |
1241 | ||
1242 | res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3, | |
1243 | &mode_data, NULL); | |
1244 | ||
1245 | error = -EINVAL; | |
1246 | if (!scsi_status_is_good(res)) | |
1247 | goto out; | |
1248 | ||
1249 | msdata = buffer + mode_data.header_length + | |
1250 | mode_data.block_descriptor_length; | |
1251 | ||
1252 | if (msdata - buffer > BUF_SIZE - 8) | |
1253 | goto out; | |
1254 | ||
1255 | error = 0; | |
1256 | ||
1257 | rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0; | |
1258 | rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5]; | |
1259 | rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7]; | |
1260 | ||
1261 | out: | |
1262 | kfree(buffer); | |
1263 | return error; | |
1264 | } | |
1265 | EXPORT_SYMBOL(sas_read_port_mode_page); | |
1266 | ||
79cb1819 JB |
1267 | static DECLARE_TRANSPORT_CLASS(sas_end_dev_class, |
1268 | "sas_end_device", NULL, NULL, NULL); | |
1269 | ||
42ab0360 JB |
1270 | #define sas_end_dev_show_simple(field, name, format_string, cast) \ |
1271 | static ssize_t \ | |
ee959b00 TJ |
1272 | show_sas_end_dev_##name(struct device *dev, \ |
1273 | struct device_attribute *attr, char *buf) \ | |
42ab0360 | 1274 | { \ |
ee959b00 | 1275 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
42ab0360 JB |
1276 | struct sas_end_device *rdev = rphy_to_end_device(rphy); \ |
1277 | \ | |
1278 | return snprintf(buf, 20, format_string, cast rdev->field); \ | |
1279 | } | |
1280 | ||
1281 | #define sas_end_dev_simple_attr(field, name, format_string, type) \ | |
1282 | sas_end_dev_show_simple(field, name, format_string, (type)) \ | |
ee959b00 | 1283 | static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \ |
42ab0360 JB |
1284 | show_sas_end_dev_##name, NULL) |
1285 | ||
1286 | sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int); | |
1287 | sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout, | |
1288 | "%d\n", int); | |
1289 | sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout, | |
1290 | "%d\n", int); | |
0f88009d JB |
1291 | sas_end_dev_simple_attr(tlr_supported, tlr_supported, |
1292 | "%d\n", int); | |
1293 | sas_end_dev_simple_attr(tlr_enabled, tlr_enabled, | |
1294 | "%d\n", int); | |
42ab0360 | 1295 | |
79cb1819 JB |
1296 | static DECLARE_TRANSPORT_CLASS(sas_expander_class, |
1297 | "sas_expander", NULL, NULL, NULL); | |
1298 | ||
1299 | #define sas_expander_show_simple(field, name, format_string, cast) \ | |
1300 | static ssize_t \ | |
ee959b00 TJ |
1301 | show_sas_expander_##name(struct device *dev, \ |
1302 | struct device_attribute *attr, char *buf) \ | |
79cb1819 | 1303 | { \ |
ee959b00 | 1304 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
79cb1819 JB |
1305 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); \ |
1306 | \ | |
1307 | return snprintf(buf, 20, format_string, cast edev->field); \ | |
1308 | } | |
1309 | ||
1310 | #define sas_expander_simple_attr(field, name, format_string, type) \ | |
1311 | sas_expander_show_simple(field, name, format_string, (type)) \ | |
ee959b00 | 1312 | static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \ |
79cb1819 JB |
1313 | show_sas_expander_##name, NULL) |
1314 | ||
1315 | sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *); | |
1316 | sas_expander_simple_attr(product_id, product_id, "%s\n", char *); | |
1317 | sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *); | |
1318 | sas_expander_simple_attr(component_vendor_id, component_vendor_id, | |
1319 | "%s\n", char *); | |
1320 | sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int); | |
1321 | sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n", | |
1322 | unsigned int); | |
1323 | sas_expander_simple_attr(level, level, "%d\n", int); | |
42ab0360 | 1324 | |
c7ebbbce | 1325 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, |
2f8600df | 1326 | "sas_device", NULL, NULL, NULL); |
c7ebbbce CH |
1327 | |
1328 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) | |
1329 | { | |
1330 | struct Scsi_Host *shost; | |
1331 | struct sas_internal *i; | |
1332 | ||
1333 | if (!scsi_is_sas_rphy(dev)) | |
1334 | return 0; | |
1335 | shost = dev_to_shost(dev->parent->parent); | |
1336 | ||
1337 | if (!shost->transportt) | |
1338 | return 0; | |
1339 | if (shost->transportt->host_attrs.ac.class != | |
1340 | &sas_host_class.class) | |
1341 | return 0; | |
1342 | ||
1343 | i = to_sas_internal(shost->transportt); | |
1344 | return &i->rphy_attr_cont.ac == cont; | |
1345 | } | |
1346 | ||
42ab0360 JB |
1347 | static int sas_end_dev_match(struct attribute_container *cont, |
1348 | struct device *dev) | |
1349 | { | |
1350 | struct Scsi_Host *shost; | |
1351 | struct sas_internal *i; | |
1352 | struct sas_rphy *rphy; | |
1353 | ||
1354 | if (!scsi_is_sas_rphy(dev)) | |
1355 | return 0; | |
1356 | shost = dev_to_shost(dev->parent->parent); | |
1357 | rphy = dev_to_rphy(dev); | |
1358 | ||
1359 | if (!shost->transportt) | |
1360 | return 0; | |
1361 | if (shost->transportt->host_attrs.ac.class != | |
1362 | &sas_host_class.class) | |
1363 | return 0; | |
1364 | ||
1365 | i = to_sas_internal(shost->transportt); | |
1366 | return &i->end_dev_attr_cont.ac == cont && | |
2f8600df | 1367 | rphy->identify.device_type == SAS_END_DEVICE; |
42ab0360 JB |
1368 | } |
1369 | ||
79cb1819 JB |
1370 | static int sas_expander_match(struct attribute_container *cont, |
1371 | struct device *dev) | |
1372 | { | |
1373 | struct Scsi_Host *shost; | |
1374 | struct sas_internal *i; | |
1375 | struct sas_rphy *rphy; | |
1376 | ||
1377 | if (!scsi_is_sas_rphy(dev)) | |
1378 | return 0; | |
1379 | shost = dev_to_shost(dev->parent->parent); | |
1380 | rphy = dev_to_rphy(dev); | |
1381 | ||
1382 | if (!shost->transportt) | |
1383 | return 0; | |
1384 | if (shost->transportt->host_attrs.ac.class != | |
1385 | &sas_host_class.class) | |
1386 | return 0; | |
1387 | ||
1388 | i = to_sas_internal(shost->transportt); | |
1389 | return &i->expander_attr_cont.ac == cont && | |
1390 | (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE || | |
2f8600df | 1391 | rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE); |
79cb1819 JB |
1392 | } |
1393 | ||
2f8600df | 1394 | static void sas_expander_release(struct device *dev) |
c7ebbbce CH |
1395 | { |
1396 | struct sas_rphy *rphy = dev_to_rphy(dev); | |
2f8600df | 1397 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
c7ebbbce | 1398 | |
93c20a59 FT |
1399 | if (rphy->q) |
1400 | blk_cleanup_queue(rphy->q); | |
1401 | ||
c7ebbbce | 1402 | put_device(dev->parent); |
2f8600df | 1403 | kfree(edev); |
c7ebbbce CH |
1404 | } |
1405 | ||
2f8600df | 1406 | static void sas_end_device_release(struct device *dev) |
c7ebbbce | 1407 | { |
2f8600df JB |
1408 | struct sas_rphy *rphy = dev_to_rphy(dev); |
1409 | struct sas_end_device *edev = rphy_to_end_device(rphy); | |
c7ebbbce | 1410 | |
93c20a59 FT |
1411 | if (rphy->q) |
1412 | blk_cleanup_queue(rphy->q); | |
1413 | ||
2f8600df JB |
1414 | put_device(dev->parent); |
1415 | kfree(edev); | |
c7ebbbce | 1416 | } |
c7ebbbce | 1417 | |
c5943d36 JB |
1418 | /** |
1419 | * sas_rphy_initialize - common rphy intialization | |
1420 | * @rphy: rphy to initialise | |
1421 | * | |
1422 | * Used by both sas_end_device_alloc() and sas_expander_alloc() to | |
1423 | * initialise the common rphy component of each. | |
1424 | */ | |
1425 | static void sas_rphy_initialize(struct sas_rphy *rphy) | |
1426 | { | |
1427 | INIT_LIST_HEAD(&rphy->list); | |
1428 | } | |
1429 | ||
42ab0360 JB |
1430 | /** |
1431 | * sas_end_device_alloc - allocate an rphy for an end device | |
eb44820c | 1432 | * @parent: which port |
42ab0360 JB |
1433 | * |
1434 | * Allocates an SAS remote PHY structure, connected to @parent. | |
1435 | * | |
1436 | * Returns: | |
1437 | * SAS PHY allocated or %NULL if the allocation failed. | |
1438 | */ | |
65c92b09 | 1439 | struct sas_rphy *sas_end_device_alloc(struct sas_port *parent) |
42ab0360 JB |
1440 | { |
1441 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
1442 | struct sas_end_device *rdev; | |
1443 | ||
1444 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); | |
1445 | if (!rdev) { | |
42ab0360 JB |
1446 | return NULL; |
1447 | } | |
1448 | ||
1449 | device_initialize(&rdev->rphy.dev); | |
1450 | rdev->rphy.dev.parent = get_device(&parent->dev); | |
2f8600df | 1451 | rdev->rphy.dev.release = sas_end_device_release; |
65c92b09 JB |
1452 | if (scsi_is_sas_expander_device(parent->dev.parent)) { |
1453 | struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent); | |
71610f55 KS |
1454 | dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d", |
1455 | shost->host_no, rphy->scsi_target_id, | |
1456 | parent->port_identifier); | |
65c92b09 | 1457 | } else |
71610f55 KS |
1458 | dev_set_name(&rdev->rphy.dev, "end_device-%d:%d", |
1459 | shost->host_no, parent->port_identifier); | |
42ab0360 | 1460 | rdev->rphy.identify.device_type = SAS_END_DEVICE; |
c5943d36 | 1461 | sas_rphy_initialize(&rdev->rphy); |
42ab0360 JB |
1462 | transport_setup_device(&rdev->rphy.dev); |
1463 | ||
1464 | return &rdev->rphy; | |
1465 | } | |
1466 | EXPORT_SYMBOL(sas_end_device_alloc); | |
1467 | ||
79cb1819 JB |
1468 | /** |
1469 | * sas_expander_alloc - allocate an rphy for an end device | |
eb44820c RL |
1470 | * @parent: which port |
1471 | * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE | |
79cb1819 JB |
1472 | * |
1473 | * Allocates an SAS remote PHY structure, connected to @parent. | |
1474 | * | |
1475 | * Returns: | |
1476 | * SAS PHY allocated or %NULL if the allocation failed. | |
1477 | */ | |
65c92b09 | 1478 | struct sas_rphy *sas_expander_alloc(struct sas_port *parent, |
79cb1819 JB |
1479 | enum sas_device_type type) |
1480 | { | |
1481 | struct Scsi_Host *shost = dev_to_shost(&parent->dev); | |
1482 | struct sas_expander_device *rdev; | |
1483 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1484 | ||
1485 | BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE && | |
1486 | type != SAS_FANOUT_EXPANDER_DEVICE); | |
1487 | ||
1488 | rdev = kzalloc(sizeof(*rdev), GFP_KERNEL); | |
1489 | if (!rdev) { | |
79cb1819 JB |
1490 | return NULL; |
1491 | } | |
1492 | ||
1493 | device_initialize(&rdev->rphy.dev); | |
1494 | rdev->rphy.dev.parent = get_device(&parent->dev); | |
2f8600df | 1495 | rdev->rphy.dev.release = sas_expander_release; |
79cb1819 JB |
1496 | mutex_lock(&sas_host->lock); |
1497 | rdev->rphy.scsi_target_id = sas_host->next_expander_id++; | |
1498 | mutex_unlock(&sas_host->lock); | |
71610f55 KS |
1499 | dev_set_name(&rdev->rphy.dev, "expander-%d:%d", |
1500 | shost->host_no, rdev->rphy.scsi_target_id); | |
79cb1819 | 1501 | rdev->rphy.identify.device_type = type; |
c5943d36 | 1502 | sas_rphy_initialize(&rdev->rphy); |
79cb1819 JB |
1503 | transport_setup_device(&rdev->rphy.dev); |
1504 | ||
1505 | return &rdev->rphy; | |
1506 | } | |
1507 | EXPORT_SYMBOL(sas_expander_alloc); | |
42ab0360 | 1508 | |
c7ebbbce | 1509 | /** |
eb44820c | 1510 | * sas_rphy_add - add a SAS remote PHY to the device hierarchy |
c7ebbbce CH |
1511 | * @rphy: The remote PHY to be added |
1512 | * | |
1513 | * Publishes a SAS remote PHY to the rest of the system. | |
1514 | */ | |
1515 | int sas_rphy_add(struct sas_rphy *rphy) | |
1516 | { | |
65c92b09 | 1517 | struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); |
c7ebbbce CH |
1518 | struct Scsi_Host *shost = dev_to_shost(parent->dev.parent); |
1519 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1520 | struct sas_identify *identify = &rphy->identify; | |
1521 | int error; | |
1522 | ||
1523 | if (parent->rphy) | |
1524 | return -ENXIO; | |
1525 | parent->rphy = rphy; | |
1526 | ||
1527 | error = device_add(&rphy->dev); | |
1528 | if (error) | |
1529 | return error; | |
1530 | transport_add_device(&rphy->dev); | |
1531 | transport_configure_device(&rphy->dev); | |
39dca558 | 1532 | if (sas_bsg_initialize(shost, rphy)) |
71610f55 | 1533 | printk("fail to a bsg device %s\n", dev_name(&rphy->dev)); |
39dca558 | 1534 | |
c7ebbbce | 1535 | |
e02f3f59 | 1536 | mutex_lock(&sas_host->lock); |
c7ebbbce CH |
1537 | list_add_tail(&rphy->list, &sas_host->rphy_list); |
1538 | if (identify->device_type == SAS_END_DEVICE && | |
1539 | (identify->target_port_protocols & | |
1540 | (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA))) | |
1541 | rphy->scsi_target_id = sas_host->next_target_id++; | |
7676f83a JB |
1542 | else if (identify->device_type == SAS_END_DEVICE) |
1543 | rphy->scsi_target_id = -1; | |
e02f3f59 | 1544 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1545 | |
79cb1819 JB |
1546 | if (identify->device_type == SAS_END_DEVICE && |
1547 | rphy->scsi_target_id != -1) { | |
2fc62e2a DW |
1548 | int lun; |
1549 | ||
1550 | if (identify->target_port_protocols & SAS_PROTOCOL_SSP) | |
1551 | lun = SCAN_WILD_CARD; | |
1552 | else | |
1553 | lun = 0; | |
1554 | ||
1555 | scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0); | |
c7ebbbce CH |
1556 | } |
1557 | ||
1558 | return 0; | |
1559 | } | |
1560 | EXPORT_SYMBOL(sas_rphy_add); | |
1561 | ||
1562 | /** | |
eb44820c RL |
1563 | * sas_rphy_free - free a SAS remote PHY |
1564 | * @rphy: SAS remote PHY to free | |
c7ebbbce CH |
1565 | * |
1566 | * Frees the specified SAS remote PHY. | |
1567 | * | |
1568 | * Note: | |
1569 | * This function must only be called on a remote | |
af901ca1 | 1570 | * PHY that has not successfully been added using |
6f63caae | 1571 | * sas_rphy_add() (or has been sas_rphy_remove()'d) |
c7ebbbce CH |
1572 | */ |
1573 | void sas_rphy_free(struct sas_rphy *rphy) | |
1574 | { | |
92aab646 | 1575 | struct device *dev = &rphy->dev; |
c7ebbbce CH |
1576 | struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent); |
1577 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1578 | ||
e02f3f59 | 1579 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1580 | list_del(&rphy->list); |
e02f3f59 | 1581 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1582 | |
b6aff669 JB |
1583 | sas_bsg_remove(shost, rphy); |
1584 | ||
92aab646 | 1585 | transport_destroy_device(dev); |
2f8600df | 1586 | |
92aab646 | 1587 | put_device(dev); |
c7ebbbce CH |
1588 | } |
1589 | EXPORT_SYMBOL(sas_rphy_free); | |
1590 | ||
1591 | /** | |
eb44820c | 1592 | * sas_rphy_delete - remove and free SAS remote PHY |
6f63caae | 1593 | * @rphy: SAS remote PHY to remove and free |
c7ebbbce | 1594 | * |
6f63caae | 1595 | * Removes the specified SAS remote PHY and frees it. |
c7ebbbce CH |
1596 | */ |
1597 | void | |
1598 | sas_rphy_delete(struct sas_rphy *rphy) | |
6f63caae DW |
1599 | { |
1600 | sas_rphy_remove(rphy); | |
1601 | sas_rphy_free(rphy); | |
1602 | } | |
1603 | EXPORT_SYMBOL(sas_rphy_delete); | |
1604 | ||
1605 | /** | |
eb44820c | 1606 | * sas_rphy_remove - remove SAS remote PHY |
6f63caae DW |
1607 | * @rphy: SAS remote phy to remove |
1608 | * | |
1609 | * Removes the specified SAS remote PHY. | |
1610 | */ | |
1611 | void | |
1612 | sas_rphy_remove(struct sas_rphy *rphy) | |
c7ebbbce CH |
1613 | { |
1614 | struct device *dev = &rphy->dev; | |
65c92b09 | 1615 | struct sas_port *parent = dev_to_sas_port(dev->parent); |
c7ebbbce | 1616 | |
d4054239 CH |
1617 | switch (rphy->identify.device_type) { |
1618 | case SAS_END_DEVICE: | |
1619 | scsi_remove_target(dev); | |
1620 | break; | |
1621 | case SAS_EDGE_EXPANDER_DEVICE: | |
1622 | case SAS_FANOUT_EXPANDER_DEVICE: | |
65c92b09 | 1623 | sas_remove_children(dev); |
d4054239 CH |
1624 | break; |
1625 | default: | |
1626 | break; | |
1627 | } | |
c7ebbbce | 1628 | |
fe8b2304 CH |
1629 | transport_remove_device(dev); |
1630 | device_del(dev); | |
c7ebbbce | 1631 | |
33b114e9 | 1632 | parent->rphy = NULL; |
c7ebbbce | 1633 | } |
6f63caae | 1634 | EXPORT_SYMBOL(sas_rphy_remove); |
c7ebbbce CH |
1635 | |
1636 | /** | |
eb44820c | 1637 | * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY |
c7ebbbce CH |
1638 | * @dev: device to check |
1639 | * | |
1640 | * Returns: | |
1641 | * %1 if the device represents a SAS remote PHY, %0 else | |
1642 | */ | |
1643 | int scsi_is_sas_rphy(const struct device *dev) | |
1644 | { | |
2f8600df JB |
1645 | return dev->release == sas_end_device_release || |
1646 | dev->release == sas_expander_release; | |
c7ebbbce CH |
1647 | } |
1648 | EXPORT_SYMBOL(scsi_is_sas_rphy); | |
1649 | ||
1650 | ||
1651 | /* | |
1652 | * SCSI scan helper | |
1653 | */ | |
1654 | ||
e02f3f59 CH |
1655 | static int sas_user_scan(struct Scsi_Host *shost, uint channel, |
1656 | uint id, uint lun) | |
c7ebbbce CH |
1657 | { |
1658 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); | |
1659 | struct sas_rphy *rphy; | |
c7ebbbce | 1660 | |
e02f3f59 | 1661 | mutex_lock(&sas_host->lock); |
c7ebbbce | 1662 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { |
6d99a3f3 JB |
1663 | if (rphy->identify.device_type != SAS_END_DEVICE || |
1664 | rphy->scsi_target_id == -1) | |
e02f3f59 CH |
1665 | continue; |
1666 | ||
e8bf3941 | 1667 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
e02f3f59 | 1668 | (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { |
e8bf3941 | 1669 | scsi_scan_target(&rphy->dev, 0, |
e02f3f59 CH |
1670 | rphy->scsi_target_id, lun, 1); |
1671 | } | |
c7ebbbce | 1672 | } |
e02f3f59 | 1673 | mutex_unlock(&sas_host->lock); |
c7ebbbce | 1674 | |
e02f3f59 | 1675 | return 0; |
c7ebbbce CH |
1676 | } |
1677 | ||
1678 | ||
1679 | /* | |
1680 | * Setup / Teardown code | |
1681 | */ | |
1682 | ||
d24e1eeb | 1683 | #define SETUP_TEMPLATE(attrb, field, perm, test) \ |
ee959b00 | 1684 | i->private_##attrb[count] = dev_attr_##field; \ |
42ab0360 | 1685 | i->private_##attrb[count].attr.mode = perm; \ |
42ab0360 JB |
1686 | i->attrb[count] = &i->private_##attrb[count]; \ |
1687 | if (test) \ | |
1688 | count++ | |
1689 | ||
d24e1eeb | 1690 | #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \ |
ee959b00 | 1691 | i->private_##attrb[count] = dev_attr_##field; \ |
d24e1eeb JB |
1692 | i->private_##attrb[count].attr.mode = perm; \ |
1693 | if (ro_test) { \ | |
1694 | i->private_##attrb[count].attr.mode = ro_perm; \ | |
1695 | i->private_##attrb[count].store = NULL; \ | |
1696 | } \ | |
1697 | i->attrb[count] = &i->private_##attrb[count]; \ | |
1698 | if (test) \ | |
1699 | count++ | |
42ab0360 JB |
1700 | |
1701 | #define SETUP_RPORT_ATTRIBUTE(field) \ | |
1702 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1) | |
c7ebbbce | 1703 | |
dd9fbb52 | 1704 | #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \ |
42ab0360 | 1705 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func) |
dd9fbb52 | 1706 | |
65c92b09 | 1707 | #define SETUP_PHY_ATTRIBUTE(field) \ |
42ab0360 | 1708 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) |
c7ebbbce | 1709 | |
d24e1eeb JB |
1710 | #define SETUP_PHY_ATTRIBUTE_RW(field) \ |
1711 | SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \ | |
1712 | !i->f->set_phy_speed, S_IRUGO) | |
1713 | ||
acbf167d DW |
1714 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \ |
1715 | SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \ | |
1716 | !i->f->func, S_IRUGO) | |
1717 | ||
65c92b09 JB |
1718 | #define SETUP_PORT_ATTRIBUTE(field) \ |
1719 | SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) | |
1720 | ||
1721 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \ | |
42ab0360 | 1722 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) |
dd9fbb52 | 1723 | |
65c92b09 | 1724 | #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \ |
fe3b5bfe | 1725 | SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1) |
07ba3a95 | 1726 | |
65c92b09 | 1727 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \ |
fe3b5bfe | 1728 | SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func) |
dd9fbb52 | 1729 | |
42ab0360 JB |
1730 | #define SETUP_END_DEV_ATTRIBUTE(field) \ |
1731 | SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1) | |
c7ebbbce | 1732 | |
79cb1819 JB |
1733 | #define SETUP_EXPANDER_ATTRIBUTE(field) \ |
1734 | SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1) | |
1735 | ||
c7ebbbce | 1736 | /** |
eb44820c | 1737 | * sas_attach_transport - instantiate SAS transport template |
c7ebbbce CH |
1738 | * @ft: SAS transport class function template |
1739 | */ | |
1740 | struct scsi_transport_template * | |
1741 | sas_attach_transport(struct sas_function_template *ft) | |
1742 | { | |
1743 | struct sas_internal *i; | |
1744 | int count; | |
1745 | ||
24669f75 | 1746 | i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL); |
c7ebbbce CH |
1747 | if (!i) |
1748 | return NULL; | |
c7ebbbce | 1749 | |
e02f3f59 | 1750 | i->t.user_scan = sas_user_scan; |
c7ebbbce CH |
1751 | |
1752 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1753 | i->t.host_attrs.ac.class = &sas_host_class.class; | |
1754 | i->t.host_attrs.ac.match = sas_host_match; | |
1755 | transport_container_register(&i->t.host_attrs); | |
1756 | i->t.host_size = sizeof(struct sas_host_attrs); | |
1757 | ||
1758 | i->phy_attr_cont.ac.class = &sas_phy_class.class; | |
1759 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; | |
1760 | i->phy_attr_cont.ac.match = sas_phy_match; | |
1761 | transport_container_register(&i->phy_attr_cont); | |
1762 | ||
65c92b09 JB |
1763 | i->port_attr_cont.ac.class = &sas_port_class.class; |
1764 | i->port_attr_cont.ac.attrs = &i->port_attrs[0]; | |
1765 | i->port_attr_cont.ac.match = sas_port_match; | |
1766 | transport_container_register(&i->port_attr_cont); | |
1767 | ||
c7ebbbce CH |
1768 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; |
1769 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; | |
1770 | i->rphy_attr_cont.ac.match = sas_rphy_match; | |
1771 | transport_container_register(&i->rphy_attr_cont); | |
1772 | ||
42ab0360 JB |
1773 | i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class; |
1774 | i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0]; | |
1775 | i->end_dev_attr_cont.ac.match = sas_end_dev_match; | |
1776 | transport_container_register(&i->end_dev_attr_cont); | |
1777 | ||
79cb1819 JB |
1778 | i->expander_attr_cont.ac.class = &sas_expander_class.class; |
1779 | i->expander_attr_cont.ac.attrs = &i->expander_attrs[0]; | |
1780 | i->expander_attr_cont.ac.match = sas_expander_match; | |
1781 | transport_container_register(&i->expander_attr_cont); | |
1782 | ||
c7ebbbce CH |
1783 | i->f = ft; |
1784 | ||
c7ebbbce | 1785 | count = 0; |
65c92b09 JB |
1786 | SETUP_PHY_ATTRIBUTE(initiator_port_protocols); |
1787 | SETUP_PHY_ATTRIBUTE(target_port_protocols); | |
1788 | SETUP_PHY_ATTRIBUTE(device_type); | |
1789 | SETUP_PHY_ATTRIBUTE(sas_address); | |
1790 | SETUP_PHY_ATTRIBUTE(phy_identifier); | |
1791 | //SETUP_PHY_ATTRIBUTE(port_identifier); | |
1792 | SETUP_PHY_ATTRIBUTE(negotiated_linkrate); | |
1793 | SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw); | |
d24e1eeb | 1794 | SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate); |
65c92b09 | 1795 | SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw); |
d24e1eeb | 1796 | SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate); |
65c92b09 JB |
1797 | |
1798 | SETUP_PHY_ATTRIBUTE(invalid_dword_count); | |
1799 | SETUP_PHY_ATTRIBUTE(running_disparity_error_count); | |
1800 | SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count); | |
1801 | SETUP_PHY_ATTRIBUTE(phy_reset_problem_count); | |
1802 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset); | |
1803 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset); | |
acbf167d | 1804 | SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable); |
c7ebbbce CH |
1805 | i->phy_attrs[count] = NULL; |
1806 | ||
65c92b09 JB |
1807 | count = 0; |
1808 | SETUP_PORT_ATTRIBUTE(num_phys); | |
1809 | i->port_attrs[count] = NULL; | |
1810 | ||
c7ebbbce CH |
1811 | count = 0; |
1812 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); | |
1813 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); | |
1814 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); | |
1815 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); | |
1816 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); | |
dd9fbb52 JB |
1817 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier, |
1818 | get_enclosure_identifier); | |
1819 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier, | |
1820 | get_bay_identifier); | |
c7ebbbce CH |
1821 | i->rphy_attrs[count] = NULL; |
1822 | ||
42ab0360 JB |
1823 | count = 0; |
1824 | SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning); | |
1825 | SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout); | |
1826 | SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout); | |
0f88009d JB |
1827 | SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported); |
1828 | SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled); | |
42ab0360 JB |
1829 | i->end_dev_attrs[count] = NULL; |
1830 | ||
79cb1819 JB |
1831 | count = 0; |
1832 | SETUP_EXPANDER_ATTRIBUTE(vendor_id); | |
1833 | SETUP_EXPANDER_ATTRIBUTE(product_id); | |
1834 | SETUP_EXPANDER_ATTRIBUTE(product_rev); | |
1835 | SETUP_EXPANDER_ATTRIBUTE(component_vendor_id); | |
1836 | SETUP_EXPANDER_ATTRIBUTE(component_id); | |
1837 | SETUP_EXPANDER_ATTRIBUTE(component_revision_id); | |
1838 | SETUP_EXPANDER_ATTRIBUTE(level); | |
1839 | i->expander_attrs[count] = NULL; | |
1840 | ||
c7ebbbce CH |
1841 | return &i->t; |
1842 | } | |
1843 | EXPORT_SYMBOL(sas_attach_transport); | |
1844 | ||
1845 | /** | |
eb44820c | 1846 | * sas_release_transport - release SAS transport template instance |
c7ebbbce CH |
1847 | * @t: transport template instance |
1848 | */ | |
1849 | void sas_release_transport(struct scsi_transport_template *t) | |
1850 | { | |
1851 | struct sas_internal *i = to_sas_internal(t); | |
1852 | ||
1853 | transport_container_unregister(&i->t.host_attrs); | |
1854 | transport_container_unregister(&i->phy_attr_cont); | |
65c92b09 | 1855 | transport_container_unregister(&i->port_attr_cont); |
c7ebbbce | 1856 | transport_container_unregister(&i->rphy_attr_cont); |
db82f841 | 1857 | transport_container_unregister(&i->end_dev_attr_cont); |
79cb1819 | 1858 | transport_container_unregister(&i->expander_attr_cont); |
c7ebbbce CH |
1859 | |
1860 | kfree(i); | |
1861 | } | |
1862 | EXPORT_SYMBOL(sas_release_transport); | |
1863 | ||
1864 | static __init int sas_transport_init(void) | |
1865 | { | |
1866 | int error; | |
1867 | ||
1868 | error = transport_class_register(&sas_host_class); | |
1869 | if (error) | |
1870 | goto out; | |
1871 | error = transport_class_register(&sas_phy_class); | |
1872 | if (error) | |
1873 | goto out_unregister_transport; | |
65c92b09 | 1874 | error = transport_class_register(&sas_port_class); |
c7ebbbce CH |
1875 | if (error) |
1876 | goto out_unregister_phy; | |
65c92b09 JB |
1877 | error = transport_class_register(&sas_rphy_class); |
1878 | if (error) | |
1879 | goto out_unregister_port; | |
42ab0360 JB |
1880 | error = transport_class_register(&sas_end_dev_class); |
1881 | if (error) | |
1882 | goto out_unregister_rphy; | |
79cb1819 JB |
1883 | error = transport_class_register(&sas_expander_class); |
1884 | if (error) | |
1885 | goto out_unregister_end_dev; | |
c7ebbbce CH |
1886 | |
1887 | return 0; | |
1888 | ||
79cb1819 JB |
1889 | out_unregister_end_dev: |
1890 | transport_class_unregister(&sas_end_dev_class); | |
42ab0360 JB |
1891 | out_unregister_rphy: |
1892 | transport_class_unregister(&sas_rphy_class); | |
65c92b09 JB |
1893 | out_unregister_port: |
1894 | transport_class_unregister(&sas_port_class); | |
c7ebbbce CH |
1895 | out_unregister_phy: |
1896 | transport_class_unregister(&sas_phy_class); | |
1897 | out_unregister_transport: | |
1898 | transport_class_unregister(&sas_host_class); | |
1899 | out: | |
1900 | return error; | |
1901 | ||
1902 | } | |
1903 | ||
1904 | static void __exit sas_transport_exit(void) | |
1905 | { | |
1906 | transport_class_unregister(&sas_host_class); | |
1907 | transport_class_unregister(&sas_phy_class); | |
65c92b09 | 1908 | transport_class_unregister(&sas_port_class); |
c7ebbbce | 1909 | transport_class_unregister(&sas_rphy_class); |
42ab0360 | 1910 | transport_class_unregister(&sas_end_dev_class); |
79cb1819 | 1911 | transport_class_unregister(&sas_expander_class); |
c7ebbbce CH |
1912 | } |
1913 | ||
1914 | MODULE_AUTHOR("Christoph Hellwig"); | |
86b9c4c1 | 1915 | MODULE_DESCRIPTION("SAS Transport Attributes"); |
c7ebbbce CH |
1916 | MODULE_LICENSE("GPL"); |
1917 | ||
1918 | module_init(sas_transport_init); | |
1919 | module_exit(sas_transport_exit); |