1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2005-2006 Dell Inc. |
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 management |
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/jiffies.h> |
29 | #include <linux/err.h> |
30 | #include <linux/slab.h> |
31 | #include <linux/string.h> |
32 | #include <linux/blkdev.h> |
33 | #include <linux/bsg.h> |
34 | |
35 | #include <scsi/scsi.h> |
36 | #include <scsi/scsi_cmnd.h> |
37 | #include <scsi/scsi_device.h> |
38 | #include <scsi/scsi_host.h> |
39 | #include <scsi/scsi_transport.h> |
40 | #include <scsi/scsi_transport_sas.h> |
41 | |
42 | #include "scsi_sas_internal.h" |
43 | struct sas_host_attrs { |
44 | struct list_head rphy_list; |
45 | struct mutex lock; |
46 | struct request_queue *q; |
47 | u32 next_target_id; |
48 | u32 next_expander_id; |
49 | int next_port_id; |
50 | }; |
51 | #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data) |
52 | |
53 | |
54 | /* |
55 | * Hack to allow attributes of the same name in different objects. |
56 | */ |
57 | #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
58 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
59 | __ATTR(_name,_mode,_show,_store) |
60 | |
61 | |
62 | /* |
63 | * Pretty printing helpers |
64 | */ |
65 | |
66 | #define sas_bitfield_name_match(title, table) \ |
67 | static ssize_t \ |
68 | get_sas_##title##_names(u32 table_key, char *buf) \ |
69 | { \ |
70 | char *prefix = ""; \ |
71 | ssize_t len = 0; \ |
72 | int i; \ |
73 | \ |
74 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
75 | if (table[i].value & table_key) { \ |
76 | len += sprintf(buf + len, "%s%s", \ |
77 | prefix, table[i].name); \ |
78 | prefix = ", "; \ |
79 | } \ |
80 | } \ |
81 | len += sprintf(buf + len, "\n"); \ |
82 | return len; \ |
83 | } |
84 | |
85 | #define sas_bitfield_name_set(title, table) \ |
86 | static ssize_t \ |
87 | set_sas_##title##_names(u32 *table_key, const char *buf) \ |
88 | { \ |
89 | ssize_t len = 0; \ |
90 | int i; \ |
91 | \ |
92 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
93 | len = strlen(table[i].name); \ |
94 | if (strncmp(buf, table[i].name, len) == 0 && \ |
95 | (buf[len] == '\n' || buf[len] == '\0')) { \ |
96 | *table_key = table[i].value; \ |
97 | return 0; \ |
98 | } \ |
99 | } \ |
100 | return -EINVAL; \ |
101 | } |
102 | |
103 | #define sas_bitfield_name_search(title, table) \ |
104 | static ssize_t \ |
105 | get_sas_##title##_names(u32 table_key, char *buf) \ |
106 | { \ |
107 | ssize_t len = 0; \ |
108 | int i; \ |
109 | \ |
110 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
111 | if (table[i].value == table_key) { \ |
112 | len += sprintf(buf + len, "%s", \ |
113 | table[i].name); \ |
114 | break; \ |
115 | } \ |
116 | } \ |
117 | len += sprintf(buf + len, "\n"); \ |
118 | return len; \ |
119 | } |
120 | |
121 | static struct { |
122 | u32 value; |
123 | char *name; |
124 | } sas_device_type_names[] = { |
125 | { SAS_PHY_UNUSED, "unused" }, |
126 | { SAS_END_DEVICE, "end device" }, |
127 | { SAS_EDGE_EXPANDER_DEVICE, "edge expander" }, |
128 | { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" }, |
129 | }; |
130 | sas_bitfield_name_search(device_type, sas_device_type_names) |
131 | |
132 | |
133 | static struct { |
134 | u32 value; |
135 | char *name; |
136 | } sas_protocol_names[] = { |
137 | { SAS_PROTOCOL_SATA, "sata" }, |
138 | { SAS_PROTOCOL_SMP, "smp" }, |
139 | { SAS_PROTOCOL_STP, "stp" }, |
140 | { SAS_PROTOCOL_SSP, "ssp" }, |
141 | }; |
142 | sas_bitfield_name_match(protocol, sas_protocol_names) |
143 | |
144 | static struct { |
145 | u32 value; |
146 | char *name; |
147 | } sas_linkspeed_names[] = { |
148 | { SAS_LINK_RATE_UNKNOWN, "Unknown" }, |
149 | { SAS_PHY_DISABLED, "Phy disabled" }, |
150 | { SAS_LINK_RATE_FAILED, "Link Rate failed" }, |
151 | { SAS_SATA_SPINUP_HOLD, "Spin-up hold" }, |
152 | { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" }, |
153 | { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" }, |
154 | { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" }, |
155 | { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" }, |
156 | { SAS_LINK_RATE_22_5_GBPS, "22.5 Gbit" }, |
157 | }; |
158 | sas_bitfield_name_search(linkspeed, sas_linkspeed_names) |
159 | sas_bitfield_name_set(linkspeed, sas_linkspeed_names) |
160 | |
161 | static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev) |
162 | { |
163 | struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target); |
164 | struct sas_end_device *rdev; |
165 | |
166 | BUG_ON(rphy->identify.device_type != SAS_END_DEVICE); |
167 | |
168 | rdev = rphy_to_end_device(rphy); |
169 | return rdev; |
170 | } |
171 | |
172 | static int sas_smp_dispatch(struct bsg_job *job) |
173 | { |
174 | struct Scsi_Host *shost = dev_to_shost(dev: job->dev); |
175 | struct sas_rphy *rphy = NULL; |
176 | |
177 | if (!scsi_is_host_device(job->dev)) |
178 | rphy = dev_to_rphy(job->dev); |
179 | |
180 | if (!job->reply_payload.payload_len) { |
181 | dev_warn(job->dev, "space for a smp response is missing\n" ); |
182 | bsg_job_done(job, result: -EINVAL, reply_payload_rcv_len: 0); |
183 | return 0; |
184 | } |
185 | |
186 | to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy); |
187 | return 0; |
188 | } |
189 | |
190 | static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy) |
191 | { |
192 | struct request_queue *q; |
193 | |
194 | if (!to_sas_internal(shost->transportt)->f->smp_handler) { |
195 | printk("%s can't handle SMP requests\n" , shost->hostt->name); |
196 | return 0; |
197 | } |
198 | |
199 | if (rphy) { |
200 | q = bsg_setup_queue(dev: &rphy->dev, name: dev_name(dev: &rphy->dev), |
201 | job_fn: sas_smp_dispatch, NULL, dd_job_size: 0); |
202 | if (IS_ERR(ptr: q)) |
203 | return PTR_ERR(ptr: q); |
204 | rphy->q = q; |
205 | } else { |
206 | char name[20]; |
207 | |
208 | snprintf(buf: name, size: sizeof(name), fmt: "sas_host%d" , shost->host_no); |
209 | q = bsg_setup_queue(dev: &shost->shost_gendev, name, |
210 | job_fn: sas_smp_dispatch, NULL, dd_job_size: 0); |
211 | if (IS_ERR(ptr: q)) |
212 | return PTR_ERR(ptr: q); |
213 | to_sas_host_attrs(shost)->q = q; |
214 | } |
215 | |
216 | return 0; |
217 | } |
218 | |
219 | /* |
220 | * SAS host attributes |
221 | */ |
222 | |
223 | static int sas_host_setup(struct transport_container *tc, struct device *dev, |
224 | struct device *cdev) |
225 | { |
226 | struct Scsi_Host *shost = dev_to_shost(dev); |
227 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); |
228 | struct device *dma_dev = shost->dma_dev; |
229 | |
230 | INIT_LIST_HEAD(list: &sas_host->rphy_list); |
231 | mutex_init(&sas_host->lock); |
232 | sas_host->next_target_id = 0; |
233 | sas_host->next_expander_id = 0; |
234 | sas_host->next_port_id = 0; |
235 | |
236 | if (sas_bsg_initialize(shost, NULL)) |
237 | dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n" , |
238 | shost->host_no); |
239 | |
240 | if (dma_dev->dma_mask) { |
241 | shost->opt_sectors = min_t(unsigned int, shost->max_sectors, |
242 | dma_opt_mapping_size(dma_dev) >> SECTOR_SHIFT); |
243 | } |
244 | |
245 | return 0; |
246 | } |
247 | |
248 | static int sas_host_remove(struct transport_container *tc, struct device *dev, |
249 | struct device *cdev) |
250 | { |
251 | struct Scsi_Host *shost = dev_to_shost(dev); |
252 | struct request_queue *q = to_sas_host_attrs(shost)->q; |
253 | |
254 | bsg_remove_queue(q); |
255 | return 0; |
256 | } |
257 | |
258 | static DECLARE_TRANSPORT_CLASS(sas_host_class, |
259 | "sas_host" , sas_host_setup, sas_host_remove, NULL); |
260 | |
261 | static int sas_host_match(struct attribute_container *cont, |
262 | struct device *dev) |
263 | { |
264 | struct Scsi_Host *shost; |
265 | struct sas_internal *i; |
266 | |
267 | if (!scsi_is_host_device(dev)) |
268 | return 0; |
269 | shost = dev_to_shost(dev); |
270 | |
271 | if (!shost->transportt) |
272 | return 0; |
273 | if (shost->transportt->host_attrs.ac.class != |
274 | &sas_host_class.class) |
275 | return 0; |
276 | |
277 | i = to_sas_internal(shost->transportt); |
278 | return &i->t.host_attrs.ac == cont; |
279 | } |
280 | |
281 | static int do_sas_phy_delete(struct device *dev, void *data) |
282 | { |
283 | int pass = (int)(unsigned long)data; |
284 | |
285 | if (pass == 0 && scsi_is_sas_port(dev)) |
286 | sas_port_delete(dev_to_sas_port(dev)); |
287 | else if (pass == 1 && scsi_is_sas_phy(dev)) |
288 | sas_phy_delete(dev_to_phy(dev)); |
289 | return 0; |
290 | } |
291 | |
292 | /** |
293 | * sas_remove_children - tear down a devices SAS data structures |
294 | * @dev: device belonging to the sas object |
295 | * |
296 | * Removes all SAS PHYs and remote PHYs for a given object |
297 | */ |
298 | void sas_remove_children(struct device *dev) |
299 | { |
300 | device_for_each_child(dev, data: (void *)0, fn: do_sas_phy_delete); |
301 | device_for_each_child(dev, data: (void *)1, fn: do_sas_phy_delete); |
302 | } |
303 | EXPORT_SYMBOL(sas_remove_children); |
304 | |
305 | /** |
306 | * sas_remove_host - tear down a Scsi_Host's SAS data structures |
307 | * @shost: Scsi Host that is torn down |
308 | * |
309 | * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the |
310 | * Scsi_Host as well. |
311 | * |
312 | * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is |
313 | * already removed. |
314 | */ |
315 | void sas_remove_host(struct Scsi_Host *shost) |
316 | { |
317 | sas_remove_children(&shost->shost_gendev); |
318 | scsi_remove_host(shost); |
319 | } |
320 | EXPORT_SYMBOL(sas_remove_host); |
321 | |
322 | /** |
323 | * sas_get_address - return the SAS address of the device |
324 | * @sdev: scsi device |
325 | * |
326 | * Returns the SAS address of the scsi device |
327 | */ |
328 | u64 sas_get_address(struct scsi_device *sdev) |
329 | { |
330 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
331 | |
332 | return rdev->rphy.identify.sas_address; |
333 | } |
334 | EXPORT_SYMBOL(sas_get_address); |
335 | |
336 | /** |
337 | * sas_tlr_supported - checking TLR bit in vpd 0x90 |
338 | * @sdev: scsi device struct |
339 | * |
340 | * Check Transport Layer Retries are supported or not. |
341 | * If vpd page 0x90 is present, TRL is supported. |
342 | * |
343 | */ |
344 | unsigned int |
345 | sas_tlr_supported(struct scsi_device *sdev) |
346 | { |
347 | const int vpd_len = 32; |
348 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
349 | char *buffer = kzalloc(size: vpd_len, GFP_KERNEL); |
350 | int ret = 0; |
351 | |
352 | if (!buffer) |
353 | goto out; |
354 | |
355 | if (scsi_get_vpd_page(sdev, page: 0x90, buf: buffer, buf_len: vpd_len)) |
356 | goto out; |
357 | |
358 | /* |
359 | * Magic numbers: the VPD Protocol page (0x90) |
360 | * has a 4 byte header and then one entry per device port |
361 | * the TLR bit is at offset 8 on each port entry |
362 | * if we take the first port, that's at total offset 12 |
363 | */ |
364 | ret = buffer[12] & 0x01; |
365 | |
366 | out: |
367 | kfree(objp: buffer); |
368 | rdev->tlr_supported = ret; |
369 | return ret; |
370 | |
371 | } |
372 | EXPORT_SYMBOL_GPL(sas_tlr_supported); |
373 | |
374 | /** |
375 | * sas_disable_tlr - setting TLR flags |
376 | * @sdev: scsi device struct |
377 | * |
378 | * Seting tlr_enabled flag to 0. |
379 | * |
380 | */ |
381 | void |
382 | sas_disable_tlr(struct scsi_device *sdev) |
383 | { |
384 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
385 | |
386 | rdev->tlr_enabled = 0; |
387 | } |
388 | EXPORT_SYMBOL_GPL(sas_disable_tlr); |
389 | |
390 | /** |
391 | * sas_enable_tlr - setting TLR flags |
392 | * @sdev: scsi device struct |
393 | * |
394 | * Seting tlr_enabled flag 1. |
395 | * |
396 | */ |
397 | void sas_enable_tlr(struct scsi_device *sdev) |
398 | { |
399 | unsigned int tlr_supported = 0; |
400 | tlr_supported = sas_tlr_supported(sdev); |
401 | |
402 | if (tlr_supported) { |
403 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
404 | |
405 | rdev->tlr_enabled = 1; |
406 | } |
407 | |
408 | return; |
409 | } |
410 | EXPORT_SYMBOL_GPL(sas_enable_tlr); |
411 | |
412 | unsigned int sas_is_tlr_enabled(struct scsi_device *sdev) |
413 | { |
414 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
415 | return rdev->tlr_enabled; |
416 | } |
417 | EXPORT_SYMBOL_GPL(sas_is_tlr_enabled); |
418 | |
419 | /* |
420 | * SAS Phy attributes |
421 | */ |
422 | |
423 | #define sas_phy_show_simple(field, name, format_string, cast) \ |
424 | static ssize_t \ |
425 | show_sas_phy_##name(struct device *dev, \ |
426 | struct device_attribute *attr, char *buf) \ |
427 | { \ |
428 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
429 | \ |
430 | return snprintf(buf, 20, format_string, cast phy->field); \ |
431 | } |
432 | |
433 | #define sas_phy_simple_attr(field, name, format_string, type) \ |
434 | sas_phy_show_simple(field, name, format_string, (type)) \ |
435 | static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) |
436 | |
437 | #define sas_phy_show_protocol(field, name) \ |
438 | static ssize_t \ |
439 | show_sas_phy_##name(struct device *dev, \ |
440 | struct device_attribute *attr, char *buf) \ |
441 | { \ |
442 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
443 | \ |
444 | if (!phy->field) \ |
445 | return snprintf(buf, 20, "none\n"); \ |
446 | return get_sas_protocol_names(phy->field, buf); \ |
447 | } |
448 | |
449 | #define sas_phy_protocol_attr(field, name) \ |
450 | sas_phy_show_protocol(field, name) \ |
451 | static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL) |
452 | |
453 | #define sas_phy_show_linkspeed(field) \ |
454 | static ssize_t \ |
455 | show_sas_phy_##field(struct device *dev, \ |
456 | struct device_attribute *attr, char *buf) \ |
457 | { \ |
458 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
459 | \ |
460 | return get_sas_linkspeed_names(phy->field, buf); \ |
461 | } |
462 | |
463 | /* Fudge to tell if we're minimum or maximum */ |
464 | #define sas_phy_store_linkspeed(field) \ |
465 | static ssize_t \ |
466 | store_sas_phy_##field(struct device *dev, \ |
467 | struct device_attribute *attr, \ |
468 | const char *buf, size_t count) \ |
469 | { \ |
470 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
471 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ |
472 | struct sas_internal *i = to_sas_internal(shost->transportt); \ |
473 | u32 value; \ |
474 | struct sas_phy_linkrates rates = {0}; \ |
475 | int error; \ |
476 | \ |
477 | error = set_sas_linkspeed_names(&value, buf); \ |
478 | if (error) \ |
479 | return error; \ |
480 | rates.field = value; \ |
481 | error = i->f->set_phy_speed(phy, &rates); \ |
482 | \ |
483 | return error ? error : count; \ |
484 | } |
485 | |
486 | #define sas_phy_linkspeed_rw_attr(field) \ |
487 | sas_phy_show_linkspeed(field) \ |
488 | sas_phy_store_linkspeed(field) \ |
489 | static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \ |
490 | store_sas_phy_##field) |
491 | |
492 | #define sas_phy_linkspeed_attr(field) \ |
493 | sas_phy_show_linkspeed(field) \ |
494 | static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) |
495 | |
496 | |
497 | #define sas_phy_show_linkerror(field) \ |
498 | static ssize_t \ |
499 | show_sas_phy_##field(struct device *dev, \ |
500 | struct device_attribute *attr, char *buf) \ |
501 | { \ |
502 | struct sas_phy *phy = transport_class_to_phy(dev); \ |
503 | struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \ |
504 | struct sas_internal *i = to_sas_internal(shost->transportt); \ |
505 | int error; \ |
506 | \ |
507 | error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \ |
508 | if (error) \ |
509 | return error; \ |
510 | return snprintf(buf, 20, "%u\n", phy->field); \ |
511 | } |
512 | |
513 | #define sas_phy_linkerror_attr(field) \ |
514 | sas_phy_show_linkerror(field) \ |
515 | static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL) |
516 | |
517 | |
518 | static ssize_t |
519 | show_sas_device_type(struct device *dev, |
520 | struct device_attribute *attr, char *buf) |
521 | { |
522 | struct sas_phy *phy = transport_class_to_phy(dev); |
523 | |
524 | if (!phy->identify.device_type) |
525 | return snprintf(buf, size: 20, fmt: "none\n" ); |
526 | return get_sas_device_type_names(table_key: phy->identify.device_type, buf); |
527 | } |
528 | static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); |
529 | |
530 | static ssize_t do_sas_phy_enable(struct device *dev, |
531 | size_t count, int enable) |
532 | { |
533 | struct sas_phy *phy = transport_class_to_phy(dev); |
534 | struct Scsi_Host *shost = dev_to_shost(dev: phy->dev.parent); |
535 | struct sas_internal *i = to_sas_internal(shost->transportt); |
536 | int error; |
537 | |
538 | error = i->f->phy_enable(phy, enable); |
539 | if (error) |
540 | return error; |
541 | phy->enabled = enable; |
542 | return count; |
543 | }; |
544 | |
545 | static ssize_t |
546 | store_sas_phy_enable(struct device *dev, struct device_attribute *attr, |
547 | const char *buf, size_t count) |
548 | { |
549 | if (count < 1) |
550 | return -EINVAL; |
551 | |
552 | switch (buf[0]) { |
553 | case '0': |
554 | do_sas_phy_enable(dev, count, enable: 0); |
555 | break; |
556 | case '1': |
557 | do_sas_phy_enable(dev, count, enable: 1); |
558 | break; |
559 | default: |
560 | return -EINVAL; |
561 | } |
562 | |
563 | return count; |
564 | } |
565 | |
566 | static ssize_t |
567 | show_sas_phy_enable(struct device *dev, struct device_attribute *attr, |
568 | char *buf) |
569 | { |
570 | struct sas_phy *phy = transport_class_to_phy(dev); |
571 | |
572 | return snprintf(buf, size: 20, fmt: "%d\n" , phy->enabled); |
573 | } |
574 | |
575 | static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable, |
576 | store_sas_phy_enable); |
577 | |
578 | static ssize_t |
579 | do_sas_phy_reset(struct device *dev, size_t count, int hard_reset) |
580 | { |
581 | struct sas_phy *phy = transport_class_to_phy(dev); |
582 | struct Scsi_Host *shost = dev_to_shost(dev: phy->dev.parent); |
583 | struct sas_internal *i = to_sas_internal(shost->transportt); |
584 | int error; |
585 | |
586 | error = i->f->phy_reset(phy, hard_reset); |
587 | if (error) |
588 | return error; |
589 | phy->enabled = 1; |
590 | return count; |
591 | }; |
592 | |
593 | static ssize_t |
594 | store_sas_link_reset(struct device *dev, struct device_attribute *attr, |
595 | const char *buf, size_t count) |
596 | { |
597 | return do_sas_phy_reset(dev, count, hard_reset: 0); |
598 | } |
599 | static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); |
600 | |
601 | static ssize_t |
602 | store_sas_hard_reset(struct device *dev, struct device_attribute *attr, |
603 | const char *buf, size_t count) |
604 | { |
605 | return do_sas_phy_reset(dev, count, hard_reset: 1); |
606 | } |
607 | static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); |
608 | |
609 | sas_phy_protocol_attr(identify.initiator_port_protocols, |
610 | initiator_port_protocols); |
611 | sas_phy_protocol_attr(identify.target_port_protocols, |
612 | target_port_protocols); |
613 | sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n" , |
614 | unsigned long long); |
615 | sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n" , u8); |
616 | sas_phy_linkspeed_attr(negotiated_linkrate); |
617 | sas_phy_linkspeed_attr(minimum_linkrate_hw); |
618 | sas_phy_linkspeed_rw_attr(minimum_linkrate); |
619 | sas_phy_linkspeed_attr(maximum_linkrate_hw); |
620 | sas_phy_linkspeed_rw_attr(maximum_linkrate); |
621 | sas_phy_linkerror_attr(invalid_dword_count); |
622 | sas_phy_linkerror_attr(running_disparity_error_count); |
623 | sas_phy_linkerror_attr(loss_of_dword_sync_count); |
624 | sas_phy_linkerror_attr(phy_reset_problem_count); |
625 | |
626 | static int sas_phy_setup(struct transport_container *tc, struct device *dev, |
627 | struct device *cdev) |
628 | { |
629 | struct sas_phy *phy = dev_to_phy(dev); |
630 | struct Scsi_Host *shost = dev_to_shost(dev: phy->dev.parent); |
631 | struct sas_internal *i = to_sas_internal(shost->transportt); |
632 | |
633 | if (i->f->phy_setup) |
634 | i->f->phy_setup(phy); |
635 | |
636 | return 0; |
637 | } |
638 | |
639 | static DECLARE_TRANSPORT_CLASS(sas_phy_class, |
640 | "sas_phy" , sas_phy_setup, NULL, NULL); |
641 | |
642 | static int sas_phy_match(struct attribute_container *cont, struct device *dev) |
643 | { |
644 | struct Scsi_Host *shost; |
645 | struct sas_internal *i; |
646 | |
647 | if (!scsi_is_sas_phy(dev)) |
648 | return 0; |
649 | shost = dev_to_shost(dev: dev->parent); |
650 | |
651 | if (!shost->transportt) |
652 | return 0; |
653 | if (shost->transportt->host_attrs.ac.class != |
654 | &sas_host_class.class) |
655 | return 0; |
656 | |
657 | i = to_sas_internal(shost->transportt); |
658 | return &i->phy_attr_cont.ac == cont; |
659 | } |
660 | |
661 | static void sas_phy_release(struct device *dev) |
662 | { |
663 | struct sas_phy *phy = dev_to_phy(dev); |
664 | struct Scsi_Host *shost = dev_to_shost(dev: phy->dev.parent); |
665 | struct sas_internal *i = to_sas_internal(shost->transportt); |
666 | |
667 | if (i->f->phy_release) |
668 | i->f->phy_release(phy); |
669 | put_device(dev: dev->parent); |
670 | kfree(objp: phy); |
671 | } |
672 | |
673 | /** |
674 | * sas_phy_alloc - allocates and initialize a SAS PHY structure |
675 | * @parent: Parent device |
676 | * @number: Phy index |
677 | * |
678 | * Allocates an SAS PHY structure. It will be added in the device tree |
679 | * below the device specified by @parent, which has to be either a Scsi_Host |
680 | * or sas_rphy. |
681 | * |
682 | * Returns: |
683 | * SAS PHY allocated or %NULL if the allocation failed. |
684 | */ |
685 | struct sas_phy *sas_phy_alloc(struct device *parent, int number) |
686 | { |
687 | struct Scsi_Host *shost = dev_to_shost(dev: parent); |
688 | struct sas_phy *phy; |
689 | |
690 | phy = kzalloc(size: sizeof(*phy), GFP_KERNEL); |
691 | if (!phy) |
692 | return NULL; |
693 | |
694 | phy->number = number; |
695 | phy->enabled = 1; |
696 | |
697 | device_initialize(dev: &phy->dev); |
698 | phy->dev.parent = get_device(dev: parent); |
699 | phy->dev.release = sas_phy_release; |
700 | INIT_LIST_HEAD(list: &phy->port_siblings); |
701 | if (scsi_is_sas_expander_device(dev: parent)) { |
702 | struct sas_rphy *rphy = dev_to_rphy(parent); |
703 | dev_set_name(dev: &phy->dev, name: "phy-%d:%d:%d" , shost->host_no, |
704 | rphy->scsi_target_id, number); |
705 | } else |
706 | dev_set_name(dev: &phy->dev, name: "phy-%d:%d" , shost->host_no, number); |
707 | |
708 | transport_setup_device(&phy->dev); |
709 | |
710 | return phy; |
711 | } |
712 | EXPORT_SYMBOL(sas_phy_alloc); |
713 | |
714 | /** |
715 | * sas_phy_add - add a SAS PHY to the device hierarchy |
716 | * @phy: The PHY to be added |
717 | * |
718 | * Publishes a SAS PHY to the rest of the system. |
719 | */ |
720 | int sas_phy_add(struct sas_phy *phy) |
721 | { |
722 | int error; |
723 | |
724 | error = device_add(dev: &phy->dev); |
725 | if (error) |
726 | return error; |
727 | |
728 | error = transport_add_device(&phy->dev); |
729 | if (error) { |
730 | device_del(dev: &phy->dev); |
731 | return error; |
732 | } |
733 | transport_configure_device(&phy->dev); |
734 | |
735 | return 0; |
736 | } |
737 | EXPORT_SYMBOL(sas_phy_add); |
738 | |
739 | /** |
740 | * sas_phy_free - free a SAS PHY |
741 | * @phy: SAS PHY to free |
742 | * |
743 | * Frees the specified SAS PHY. |
744 | * |
745 | * Note: |
746 | * This function must only be called on a PHY that has not |
747 | * successfully been added using sas_phy_add(). |
748 | */ |
749 | void sas_phy_free(struct sas_phy *phy) |
750 | { |
751 | transport_destroy_device(&phy->dev); |
752 | put_device(dev: &phy->dev); |
753 | } |
754 | EXPORT_SYMBOL(sas_phy_free); |
755 | |
756 | /** |
757 | * sas_phy_delete - remove SAS PHY |
758 | * @phy: SAS PHY to remove |
759 | * |
760 | * Removes the specified SAS PHY. If the SAS PHY has an |
761 | * associated remote PHY it is removed before. |
762 | */ |
763 | void |
764 | sas_phy_delete(struct sas_phy *phy) |
765 | { |
766 | struct device *dev = &phy->dev; |
767 | |
768 | /* this happens if the phy is still part of a port when deleted */ |
769 | BUG_ON(!list_empty(&phy->port_siblings)); |
770 | |
771 | transport_remove_device(dev); |
772 | device_del(dev); |
773 | transport_destroy_device(dev); |
774 | put_device(dev); |
775 | } |
776 | EXPORT_SYMBOL(sas_phy_delete); |
777 | |
778 | /** |
779 | * scsi_is_sas_phy - check if a struct device represents a SAS PHY |
780 | * @dev: device to check |
781 | * |
782 | * Returns: |
783 | * %1 if the device represents a SAS PHY, %0 else |
784 | */ |
785 | int scsi_is_sas_phy(const struct device *dev) |
786 | { |
787 | return dev->release == sas_phy_release; |
788 | } |
789 | EXPORT_SYMBOL(scsi_is_sas_phy); |
790 | |
791 | /* |
792 | * SAS Port attributes |
793 | */ |
794 | #define sas_port_show_simple(field, name, format_string, cast) \ |
795 | static ssize_t \ |
796 | show_sas_port_##name(struct device *dev, \ |
797 | struct device_attribute *attr, char *buf) \ |
798 | { \ |
799 | struct sas_port *port = transport_class_to_sas_port(dev); \ |
800 | \ |
801 | return snprintf(buf, 20, format_string, cast port->field); \ |
802 | } |
803 | |
804 | #define sas_port_simple_attr(field, name, format_string, type) \ |
805 | sas_port_show_simple(field, name, format_string, (type)) \ |
806 | static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL) |
807 | |
808 | sas_port_simple_attr(num_phys, num_phys, "%d\n" , int); |
809 | |
810 | static DECLARE_TRANSPORT_CLASS(sas_port_class, |
811 | "sas_port" , NULL, NULL, NULL); |
812 | |
813 | static int sas_port_match(struct attribute_container *cont, struct device *dev) |
814 | { |
815 | struct Scsi_Host *shost; |
816 | struct sas_internal *i; |
817 | |
818 | if (!scsi_is_sas_port(dev)) |
819 | return 0; |
820 | shost = dev_to_shost(dev: dev->parent); |
821 | |
822 | if (!shost->transportt) |
823 | return 0; |
824 | if (shost->transportt->host_attrs.ac.class != |
825 | &sas_host_class.class) |
826 | return 0; |
827 | |
828 | i = to_sas_internal(shost->transportt); |
829 | return &i->port_attr_cont.ac == cont; |
830 | } |
831 | |
832 | |
833 | static void sas_port_release(struct device *dev) |
834 | { |
835 | struct sas_port *port = dev_to_sas_port(dev); |
836 | |
837 | BUG_ON(!list_empty(&port->phy_list)); |
838 | |
839 | put_device(dev: dev->parent); |
840 | kfree(objp: port); |
841 | } |
842 | |
843 | static void sas_port_create_link(struct sas_port *port, |
844 | struct sas_phy *phy) |
845 | { |
846 | int res; |
847 | |
848 | res = sysfs_create_link(kobj: &port->dev.kobj, target: &phy->dev.kobj, |
849 | name: dev_name(dev: &phy->dev)); |
850 | if (res) |
851 | goto err; |
852 | res = sysfs_create_link(kobj: &phy->dev.kobj, target: &port->dev.kobj, name: "port" ); |
853 | if (res) |
854 | goto err; |
855 | return; |
856 | err: |
857 | printk(KERN_ERR "%s: Cannot create port links, err=%d\n" , |
858 | __func__, res); |
859 | } |
860 | |
861 | static void sas_port_delete_link(struct sas_port *port, |
862 | struct sas_phy *phy) |
863 | { |
864 | sysfs_remove_link(kobj: &port->dev.kobj, name: dev_name(dev: &phy->dev)); |
865 | sysfs_remove_link(kobj: &phy->dev.kobj, name: "port" ); |
866 | } |
867 | |
868 | /** sas_port_alloc - allocate and initialize a SAS port structure |
869 | * |
870 | * @parent: parent device |
871 | * @port_id: port number |
872 | * |
873 | * Allocates a SAS port structure. It will be added to the device tree |
874 | * below the device specified by @parent which must be either a Scsi_Host |
875 | * or a sas_expander_device. |
876 | * |
877 | * Returns %NULL on error |
878 | */ |
879 | struct sas_port *sas_port_alloc(struct device *parent, int port_id) |
880 | { |
881 | struct Scsi_Host *shost = dev_to_shost(dev: parent); |
882 | struct sas_port *port; |
883 | |
884 | port = kzalloc(size: sizeof(*port), GFP_KERNEL); |
885 | if (!port) |
886 | return NULL; |
887 | |
888 | port->port_identifier = port_id; |
889 | |
890 | device_initialize(dev: &port->dev); |
891 | |
892 | port->dev.parent = get_device(dev: parent); |
893 | port->dev.release = sas_port_release; |
894 | |
895 | mutex_init(&port->phy_list_mutex); |
896 | INIT_LIST_HEAD(list: &port->phy_list); |
897 | |
898 | if (scsi_is_sas_expander_device(dev: parent)) { |
899 | struct sas_rphy *rphy = dev_to_rphy(parent); |
900 | dev_set_name(dev: &port->dev, name: "port-%d:%d:%d" , shost->host_no, |
901 | rphy->scsi_target_id, port->port_identifier); |
902 | } else |
903 | dev_set_name(dev: &port->dev, name: "port-%d:%d" , shost->host_no, |
904 | port->port_identifier); |
905 | |
906 | transport_setup_device(&port->dev); |
907 | |
908 | return port; |
909 | } |
910 | EXPORT_SYMBOL(sas_port_alloc); |
911 | |
912 | /** sas_port_alloc_num - allocate and initialize a SAS port structure |
913 | * |
914 | * @parent: parent device |
915 | * |
916 | * Allocates a SAS port structure and a number to go with it. This |
917 | * interface is really for adapters where the port number has no |
918 | * meansing, so the sas class should manage them. It will be added to |
919 | * the device tree below the device specified by @parent which must be |
920 | * either a Scsi_Host or a sas_expander_device. |
921 | * |
922 | * Returns %NULL on error |
923 | */ |
924 | struct sas_port *sas_port_alloc_num(struct device *parent) |
925 | { |
926 | int index; |
927 | struct Scsi_Host *shost = dev_to_shost(dev: parent); |
928 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); |
929 | |
930 | /* FIXME: use idr for this eventually */ |
931 | mutex_lock(&sas_host->lock); |
932 | if (scsi_is_sas_expander_device(dev: parent)) { |
933 | struct sas_rphy *rphy = dev_to_rphy(parent); |
934 | struct sas_expander_device *exp = rphy_to_expander_device(rphy); |
935 | |
936 | index = exp->next_port_id++; |
937 | } else |
938 | index = sas_host->next_port_id++; |
939 | mutex_unlock(lock: &sas_host->lock); |
940 | return sas_port_alloc(parent, index); |
941 | } |
942 | EXPORT_SYMBOL(sas_port_alloc_num); |
943 | |
944 | /** |
945 | * sas_port_add - add a SAS port to the device hierarchy |
946 | * @port: port to be added |
947 | * |
948 | * publishes a port to the rest of the system |
949 | */ |
950 | int sas_port_add(struct sas_port *port) |
951 | { |
952 | int error; |
953 | |
954 | /* No phys should be added until this is made visible */ |
955 | BUG_ON(!list_empty(&port->phy_list)); |
956 | |
957 | error = device_add(dev: &port->dev); |
958 | |
959 | if (error) |
960 | return error; |
961 | |
962 | transport_add_device(&port->dev); |
963 | transport_configure_device(&port->dev); |
964 | |
965 | return 0; |
966 | } |
967 | EXPORT_SYMBOL(sas_port_add); |
968 | |
969 | /** |
970 | * sas_port_free - free a SAS PORT |
971 | * @port: SAS PORT to free |
972 | * |
973 | * Frees the specified SAS PORT. |
974 | * |
975 | * Note: |
976 | * This function must only be called on a PORT that has not |
977 | * successfully been added using sas_port_add(). |
978 | */ |
979 | void sas_port_free(struct sas_port *port) |
980 | { |
981 | transport_destroy_device(&port->dev); |
982 | put_device(dev: &port->dev); |
983 | } |
984 | EXPORT_SYMBOL(sas_port_free); |
985 | |
986 | /** |
987 | * sas_port_delete - remove SAS PORT |
988 | * @port: SAS PORT to remove |
989 | * |
990 | * Removes the specified SAS PORT. If the SAS PORT has an |
991 | * associated phys, unlink them from the port as well. |
992 | */ |
993 | void sas_port_delete(struct sas_port *port) |
994 | { |
995 | struct device *dev = &port->dev; |
996 | struct sas_phy *phy, *tmp_phy; |
997 | |
998 | if (port->rphy) { |
999 | sas_rphy_delete(port->rphy); |
1000 | port->rphy = NULL; |
1001 | } |
1002 | |
1003 | mutex_lock(&port->phy_list_mutex); |
1004 | list_for_each_entry_safe(phy, tmp_phy, &port->phy_list, |
1005 | port_siblings) { |
1006 | sas_port_delete_link(port, phy); |
1007 | list_del_init(entry: &phy->port_siblings); |
1008 | } |
1009 | mutex_unlock(lock: &port->phy_list_mutex); |
1010 | |
1011 | if (port->is_backlink) { |
1012 | struct device *parent = port->dev.parent; |
1013 | |
1014 | sysfs_remove_link(kobj: &port->dev.kobj, name: dev_name(dev: parent)); |
1015 | port->is_backlink = 0; |
1016 | } |
1017 | |
1018 | transport_remove_device(dev); |
1019 | device_del(dev); |
1020 | transport_destroy_device(dev); |
1021 | put_device(dev); |
1022 | } |
1023 | EXPORT_SYMBOL(sas_port_delete); |
1024 | |
1025 | /** |
1026 | * scsi_is_sas_port - check if a struct device represents a SAS port |
1027 | * @dev: device to check |
1028 | * |
1029 | * Returns: |
1030 | * %1 if the device represents a SAS Port, %0 else |
1031 | */ |
1032 | int scsi_is_sas_port(const struct device *dev) |
1033 | { |
1034 | return dev->release == sas_port_release; |
1035 | } |
1036 | EXPORT_SYMBOL(scsi_is_sas_port); |
1037 | |
1038 | /** |
1039 | * sas_port_get_phy - try to take a reference on a port member |
1040 | * @port: port to check |
1041 | */ |
1042 | struct sas_phy *sas_port_get_phy(struct sas_port *port) |
1043 | { |
1044 | struct sas_phy *phy; |
1045 | |
1046 | mutex_lock(&port->phy_list_mutex); |
1047 | if (list_empty(head: &port->phy_list)) |
1048 | phy = NULL; |
1049 | else { |
1050 | struct list_head *ent = port->phy_list.next; |
1051 | |
1052 | phy = list_entry(ent, typeof(*phy), port_siblings); |
1053 | get_device(dev: &phy->dev); |
1054 | } |
1055 | mutex_unlock(lock: &port->phy_list_mutex); |
1056 | |
1057 | return phy; |
1058 | } |
1059 | EXPORT_SYMBOL(sas_port_get_phy); |
1060 | |
1061 | /** |
1062 | * sas_port_add_phy - add another phy to a port to form a wide port |
1063 | * @port: port to add the phy to |
1064 | * @phy: phy to add |
1065 | * |
1066 | * When a port is initially created, it is empty (has no phys). All |
1067 | * ports must have at least one phy to operated, and all wide ports |
1068 | * must have at least two. The current code makes no difference |
1069 | * between ports and wide ports, but the only object that can be |
1070 | * connected to a remote device is a port, so ports must be formed on |
1071 | * all devices with phys if they're connected to anything. |
1072 | */ |
1073 | void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy) |
1074 | { |
1075 | mutex_lock(&port->phy_list_mutex); |
1076 | if (unlikely(!list_empty(&phy->port_siblings))) { |
1077 | /* make sure we're already on this port */ |
1078 | struct sas_phy *tmp; |
1079 | |
1080 | list_for_each_entry(tmp, &port->phy_list, port_siblings) |
1081 | if (tmp == phy) |
1082 | break; |
1083 | /* If this trips, you added a phy that was already |
1084 | * part of a different port */ |
1085 | if (unlikely(tmp != phy)) { |
1086 | dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n" , |
1087 | dev_name(&phy->dev)); |
1088 | BUG(); |
1089 | } |
1090 | } else { |
1091 | sas_port_create_link(port, phy); |
1092 | list_add_tail(new: &phy->port_siblings, head: &port->phy_list); |
1093 | port->num_phys++; |
1094 | } |
1095 | mutex_unlock(lock: &port->phy_list_mutex); |
1096 | } |
1097 | EXPORT_SYMBOL(sas_port_add_phy); |
1098 | |
1099 | /** |
1100 | * sas_port_delete_phy - remove a phy from a port or wide port |
1101 | * @port: port to remove the phy from |
1102 | * @phy: phy to remove |
1103 | * |
1104 | * This operation is used for tearing down ports again. It must be |
1105 | * done to every port or wide port before calling sas_port_delete. |
1106 | */ |
1107 | void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy) |
1108 | { |
1109 | mutex_lock(&port->phy_list_mutex); |
1110 | sas_port_delete_link(port, phy); |
1111 | list_del_init(entry: &phy->port_siblings); |
1112 | port->num_phys--; |
1113 | mutex_unlock(lock: &port->phy_list_mutex); |
1114 | } |
1115 | EXPORT_SYMBOL(sas_port_delete_phy); |
1116 | |
1117 | void sas_port_mark_backlink(struct sas_port *port) |
1118 | { |
1119 | int res; |
1120 | struct device *parent = port->dev.parent->parent->parent; |
1121 | |
1122 | if (port->is_backlink) |
1123 | return; |
1124 | port->is_backlink = 1; |
1125 | res = sysfs_create_link(kobj: &port->dev.kobj, target: &parent->kobj, |
1126 | name: dev_name(dev: parent)); |
1127 | if (res) |
1128 | goto err; |
1129 | return; |
1130 | err: |
1131 | printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n" , |
1132 | __func__, res); |
1133 | |
1134 | } |
1135 | EXPORT_SYMBOL(sas_port_mark_backlink); |
1136 | |
1137 | /* |
1138 | * SAS remote PHY attributes. |
1139 | */ |
1140 | |
1141 | #define sas_rphy_show_simple(field, name, format_string, cast) \ |
1142 | static ssize_t \ |
1143 | show_sas_rphy_##name(struct device *dev, \ |
1144 | struct device_attribute *attr, char *buf) \ |
1145 | { \ |
1146 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
1147 | \ |
1148 | return snprintf(buf, 20, format_string, cast rphy->field); \ |
1149 | } |
1150 | |
1151 | #define sas_rphy_simple_attr(field, name, format_string, type) \ |
1152 | sas_rphy_show_simple(field, name, format_string, (type)) \ |
1153 | static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \ |
1154 | show_sas_rphy_##name, NULL) |
1155 | |
1156 | #define sas_rphy_show_protocol(field, name) \ |
1157 | static ssize_t \ |
1158 | show_sas_rphy_##name(struct device *dev, \ |
1159 | struct device_attribute *attr, char *buf) \ |
1160 | { \ |
1161 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
1162 | \ |
1163 | if (!rphy->field) \ |
1164 | return snprintf(buf, 20, "none\n"); \ |
1165 | return get_sas_protocol_names(rphy->field, buf); \ |
1166 | } |
1167 | |
1168 | #define sas_rphy_protocol_attr(field, name) \ |
1169 | sas_rphy_show_protocol(field, name) \ |
1170 | static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \ |
1171 | show_sas_rphy_##name, NULL) |
1172 | |
1173 | static ssize_t |
1174 | show_sas_rphy_device_type(struct device *dev, |
1175 | struct device_attribute *attr, char *buf) |
1176 | { |
1177 | struct sas_rphy *rphy = transport_class_to_rphy(dev); |
1178 | |
1179 | if (!rphy->identify.device_type) |
1180 | return snprintf(buf, size: 20, fmt: "none\n" ); |
1181 | return get_sas_device_type_names( |
1182 | table_key: rphy->identify.device_type, buf); |
1183 | } |
1184 | |
1185 | static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO, |
1186 | show_sas_rphy_device_type, NULL); |
1187 | |
1188 | static ssize_t |
1189 | show_sas_rphy_enclosure_identifier(struct device *dev, |
1190 | struct device_attribute *attr, char *buf) |
1191 | { |
1192 | struct sas_rphy *rphy = transport_class_to_rphy(dev); |
1193 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); |
1194 | struct Scsi_Host *shost = dev_to_shost(dev: phy->dev.parent); |
1195 | struct sas_internal *i = to_sas_internal(shost->transportt); |
1196 | u64 identifier; |
1197 | int error; |
1198 | |
1199 | error = i->f->get_enclosure_identifier(rphy, &identifier); |
1200 | if (error) |
1201 | return error; |
1202 | return sprintf(buf, fmt: "0x%llx\n" , (unsigned long long)identifier); |
1203 | } |
1204 | |
1205 | static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO, |
1206 | show_sas_rphy_enclosure_identifier, NULL); |
1207 | |
1208 | static ssize_t |
1209 | show_sas_rphy_bay_identifier(struct device *dev, |
1210 | struct device_attribute *attr, char *buf) |
1211 | { |
1212 | struct sas_rphy *rphy = transport_class_to_rphy(dev); |
1213 | struct sas_phy *phy = dev_to_phy(rphy->dev.parent); |
1214 | struct Scsi_Host *shost = dev_to_shost(dev: phy->dev.parent); |
1215 | struct sas_internal *i = to_sas_internal(shost->transportt); |
1216 | int val; |
1217 | |
1218 | val = i->f->get_bay_identifier(rphy); |
1219 | if (val < 0) |
1220 | return val; |
1221 | return sprintf(buf, fmt: "%d\n" , val); |
1222 | } |
1223 | |
1224 | static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO, |
1225 | show_sas_rphy_bay_identifier, NULL); |
1226 | |
1227 | sas_rphy_protocol_attr(identify.initiator_port_protocols, |
1228 | initiator_port_protocols); |
1229 | sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols); |
1230 | sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n" , |
1231 | unsigned long long); |
1232 | sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n" , u8); |
1233 | sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n" , u32); |
1234 | |
1235 | /* only need 8 bytes of data plus header (4 or 8) */ |
1236 | #define BUF_SIZE 64 |
1237 | |
1238 | int sas_read_port_mode_page(struct scsi_device *sdev) |
1239 | { |
1240 | char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata; |
1241 | struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); |
1242 | struct scsi_mode_data mode_data; |
1243 | int error; |
1244 | |
1245 | if (!buffer) |
1246 | return -ENOMEM; |
1247 | |
1248 | error = scsi_mode_sense(sdev, dbd: 1, modepage: 0x19, subpage: 0, buffer, BUF_SIZE, timeout: 30*HZ, retries: 3, |
1249 | data: &mode_data, NULL); |
1250 | |
1251 | if (error) |
1252 | goto out; |
1253 | |
1254 | msdata = buffer + mode_data.header_length + |
1255 | mode_data.block_descriptor_length; |
1256 | |
1257 | if (msdata - buffer > BUF_SIZE - 8) |
1258 | goto out; |
1259 | |
1260 | error = 0; |
1261 | |
1262 | rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0; |
1263 | rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5]; |
1264 | rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7]; |
1265 | |
1266 | out: |
1267 | kfree(objp: buffer); |
1268 | return error; |
1269 | } |
1270 | EXPORT_SYMBOL(sas_read_port_mode_page); |
1271 | |
1272 | static DECLARE_TRANSPORT_CLASS(sas_end_dev_class, |
1273 | "sas_end_device" , NULL, NULL, NULL); |
1274 | |
1275 | #define sas_end_dev_show_simple(field, name, format_string, cast) \ |
1276 | static ssize_t \ |
1277 | show_sas_end_dev_##name(struct device *dev, \ |
1278 | struct device_attribute *attr, char *buf) \ |
1279 | { \ |
1280 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
1281 | struct sas_end_device *rdev = rphy_to_end_device(rphy); \ |
1282 | \ |
1283 | return snprintf(buf, 20, format_string, cast rdev->field); \ |
1284 | } |
1285 | |
1286 | #define sas_end_dev_simple_attr(field, name, format_string, type) \ |
1287 | sas_end_dev_show_simple(field, name, format_string, (type)) \ |
1288 | static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \ |
1289 | show_sas_end_dev_##name, NULL) |
1290 | |
1291 | sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n" , int); |
1292 | sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout, |
1293 | "%d\n" , int); |
1294 | sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout, |
1295 | "%d\n" , int); |
1296 | sas_end_dev_simple_attr(tlr_supported, tlr_supported, |
1297 | "%d\n" , int); |
1298 | sas_end_dev_simple_attr(tlr_enabled, tlr_enabled, |
1299 | "%d\n" , int); |
1300 | |
1301 | static DECLARE_TRANSPORT_CLASS(sas_expander_class, |
1302 | "sas_expander" , NULL, NULL, NULL); |
1303 | |
1304 | #define sas_expander_show_simple(field, name, format_string, cast) \ |
1305 | static ssize_t \ |
1306 | show_sas_expander_##name(struct device *dev, \ |
1307 | struct device_attribute *attr, char *buf) \ |
1308 | { \ |
1309 | struct sas_rphy *rphy = transport_class_to_rphy(dev); \ |
1310 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); \ |
1311 | \ |
1312 | return snprintf(buf, 20, format_string, cast edev->field); \ |
1313 | } |
1314 | |
1315 | #define sas_expander_simple_attr(field, name, format_string, type) \ |
1316 | sas_expander_show_simple(field, name, format_string, (type)) \ |
1317 | static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \ |
1318 | show_sas_expander_##name, NULL) |
1319 | |
1320 | sas_expander_simple_attr(vendor_id, vendor_id, "%s\n" , char *); |
1321 | sas_expander_simple_attr(product_id, product_id, "%s\n" , char *); |
1322 | sas_expander_simple_attr(product_rev, product_rev, "%s\n" , char *); |
1323 | sas_expander_simple_attr(component_vendor_id, component_vendor_id, |
1324 | "%s\n" , char *); |
1325 | sas_expander_simple_attr(component_id, component_id, "%u\n" , unsigned int); |
1326 | sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n" , |
1327 | unsigned int); |
1328 | sas_expander_simple_attr(level, level, "%d\n" , int); |
1329 | |
1330 | static DECLARE_TRANSPORT_CLASS(sas_rphy_class, |
1331 | "sas_device" , NULL, NULL, NULL); |
1332 | |
1333 | static int sas_rphy_match(struct attribute_container *cont, struct device *dev) |
1334 | { |
1335 | struct Scsi_Host *shost; |
1336 | struct sas_internal *i; |
1337 | |
1338 | if (!scsi_is_sas_rphy(dev)) |
1339 | return 0; |
1340 | shost = dev_to_shost(dev: dev->parent->parent); |
1341 | |
1342 | if (!shost->transportt) |
1343 | return 0; |
1344 | if (shost->transportt->host_attrs.ac.class != |
1345 | &sas_host_class.class) |
1346 | return 0; |
1347 | |
1348 | i = to_sas_internal(shost->transportt); |
1349 | return &i->rphy_attr_cont.ac == cont; |
1350 | } |
1351 | |
1352 | static int sas_end_dev_match(struct attribute_container *cont, |
1353 | struct device *dev) |
1354 | { |
1355 | struct Scsi_Host *shost; |
1356 | struct sas_internal *i; |
1357 | struct sas_rphy *rphy; |
1358 | |
1359 | if (!scsi_is_sas_rphy(dev)) |
1360 | return 0; |
1361 | shost = dev_to_shost(dev: dev->parent->parent); |
1362 | rphy = dev_to_rphy(dev); |
1363 | |
1364 | if (!shost->transportt) |
1365 | return 0; |
1366 | if (shost->transportt->host_attrs.ac.class != |
1367 | &sas_host_class.class) |
1368 | return 0; |
1369 | |
1370 | i = to_sas_internal(shost->transportt); |
1371 | return &i->end_dev_attr_cont.ac == cont && |
1372 | rphy->identify.device_type == SAS_END_DEVICE; |
1373 | } |
1374 | |
1375 | static int sas_expander_match(struct attribute_container *cont, |
1376 | struct device *dev) |
1377 | { |
1378 | struct Scsi_Host *shost; |
1379 | struct sas_internal *i; |
1380 | struct sas_rphy *rphy; |
1381 | |
1382 | if (!scsi_is_sas_rphy(dev)) |
1383 | return 0; |
1384 | shost = dev_to_shost(dev: dev->parent->parent); |
1385 | rphy = dev_to_rphy(dev); |
1386 | |
1387 | if (!shost->transportt) |
1388 | return 0; |
1389 | if (shost->transportt->host_attrs.ac.class != |
1390 | &sas_host_class.class) |
1391 | return 0; |
1392 | |
1393 | i = to_sas_internal(shost->transportt); |
1394 | return &i->expander_attr_cont.ac == cont && |
1395 | (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE || |
1396 | rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE); |
1397 | } |
1398 | |
1399 | static void sas_expander_release(struct device *dev) |
1400 | { |
1401 | struct sas_rphy *rphy = dev_to_rphy(dev); |
1402 | struct sas_expander_device *edev = rphy_to_expander_device(rphy); |
1403 | |
1404 | put_device(dev: dev->parent); |
1405 | kfree(objp: edev); |
1406 | } |
1407 | |
1408 | static void sas_end_device_release(struct device *dev) |
1409 | { |
1410 | struct sas_rphy *rphy = dev_to_rphy(dev); |
1411 | struct sas_end_device *edev = rphy_to_end_device(rphy); |
1412 | |
1413 | put_device(dev: dev->parent); |
1414 | kfree(objp: edev); |
1415 | } |
1416 | |
1417 | /** |
1418 | * sas_rphy_initialize - common rphy initialization |
1419 | * @rphy: rphy to initialise |
1420 | * |
1421 | * Used by both sas_end_device_alloc() and sas_expander_alloc() to |
1422 | * initialise the common rphy component of each. |
1423 | */ |
1424 | static void sas_rphy_initialize(struct sas_rphy *rphy) |
1425 | { |
1426 | INIT_LIST_HEAD(list: &rphy->list); |
1427 | } |
1428 | |
1429 | /** |
1430 | * sas_end_device_alloc - allocate an rphy for an end device |
1431 | * @parent: which port |
1432 | * |
1433 | * Allocates an SAS remote PHY structure, connected to @parent. |
1434 | * |
1435 | * Returns: |
1436 | * SAS PHY allocated or %NULL if the allocation failed. |
1437 | */ |
1438 | struct sas_rphy *sas_end_device_alloc(struct sas_port *parent) |
1439 | { |
1440 | struct Scsi_Host *shost = dev_to_shost(dev: &parent->dev); |
1441 | struct sas_end_device *rdev; |
1442 | |
1443 | rdev = kzalloc(size: sizeof(*rdev), GFP_KERNEL); |
1444 | if (!rdev) { |
1445 | return NULL; |
1446 | } |
1447 | |
1448 | device_initialize(dev: &rdev->rphy.dev); |
1449 | rdev->rphy.dev.parent = get_device(dev: &parent->dev); |
1450 | rdev->rphy.dev.release = sas_end_device_release; |
1451 | if (scsi_is_sas_expander_device(dev: parent->dev.parent)) { |
1452 | struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent); |
1453 | dev_set_name(dev: &rdev->rphy.dev, name: "end_device-%d:%d:%d" , |
1454 | shost->host_no, rphy->scsi_target_id, |
1455 | parent->port_identifier); |
1456 | } else |
1457 | dev_set_name(dev: &rdev->rphy.dev, name: "end_device-%d:%d" , |
1458 | shost->host_no, parent->port_identifier); |
1459 | rdev->rphy.identify.device_type = SAS_END_DEVICE; |
1460 | sas_rphy_initialize(rphy: &rdev->rphy); |
1461 | transport_setup_device(&rdev->rphy.dev); |
1462 | |
1463 | return &rdev->rphy; |
1464 | } |
1465 | EXPORT_SYMBOL(sas_end_device_alloc); |
1466 | |
1467 | /** |
1468 | * sas_expander_alloc - allocate an rphy for an end device |
1469 | * @parent: which port |
1470 | * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE |
1471 | * |
1472 | * Allocates an SAS remote PHY structure, connected to @parent. |
1473 | * |
1474 | * Returns: |
1475 | * SAS PHY allocated or %NULL if the allocation failed. |
1476 | */ |
1477 | struct sas_rphy *sas_expander_alloc(struct sas_port *parent, |
1478 | enum sas_device_type type) |
1479 | { |
1480 | struct Scsi_Host *shost = dev_to_shost(dev: &parent->dev); |
1481 | struct sas_expander_device *rdev; |
1482 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); |
1483 | |
1484 | BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE && |
1485 | type != SAS_FANOUT_EXPANDER_DEVICE); |
1486 | |
1487 | rdev = kzalloc(size: sizeof(*rdev), GFP_KERNEL); |
1488 | if (!rdev) { |
1489 | return NULL; |
1490 | } |
1491 | |
1492 | device_initialize(dev: &rdev->rphy.dev); |
1493 | rdev->rphy.dev.parent = get_device(dev: &parent->dev); |
1494 | rdev->rphy.dev.release = sas_expander_release; |
1495 | mutex_lock(&sas_host->lock); |
1496 | rdev->rphy.scsi_target_id = sas_host->next_expander_id++; |
1497 | mutex_unlock(lock: &sas_host->lock); |
1498 | dev_set_name(dev: &rdev->rphy.dev, name: "expander-%d:%d" , |
1499 | shost->host_no, rdev->rphy.scsi_target_id); |
1500 | rdev->rphy.identify.device_type = type; |
1501 | sas_rphy_initialize(rphy: &rdev->rphy); |
1502 | transport_setup_device(&rdev->rphy.dev); |
1503 | |
1504 | return &rdev->rphy; |
1505 | } |
1506 | EXPORT_SYMBOL(sas_expander_alloc); |
1507 | |
1508 | /** |
1509 | * sas_rphy_add - add a SAS remote PHY to the device hierarchy |
1510 | * @rphy: The remote PHY to be added |
1511 | * |
1512 | * Publishes a SAS remote PHY to the rest of the system. |
1513 | */ |
1514 | int sas_rphy_add(struct sas_rphy *rphy) |
1515 | { |
1516 | struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); |
1517 | struct Scsi_Host *shost = dev_to_shost(dev: parent->dev.parent); |
1518 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); |
1519 | struct sas_identify *identify = &rphy->identify; |
1520 | int error; |
1521 | |
1522 | if (parent->rphy) |
1523 | return -ENXIO; |
1524 | parent->rphy = rphy; |
1525 | |
1526 | error = device_add(dev: &rphy->dev); |
1527 | if (error) |
1528 | return error; |
1529 | transport_add_device(&rphy->dev); |
1530 | transport_configure_device(&rphy->dev); |
1531 | if (sas_bsg_initialize(shost, rphy)) |
1532 | printk("fail to a bsg device %s\n" , dev_name(&rphy->dev)); |
1533 | |
1534 | |
1535 | mutex_lock(&sas_host->lock); |
1536 | list_add_tail(new: &rphy->list, head: &sas_host->rphy_list); |
1537 | if (identify->device_type == SAS_END_DEVICE && |
1538 | (identify->target_port_protocols & |
1539 | (SAS_PROTOCOL_SSP | SAS_PROTOCOL_STP | SAS_PROTOCOL_SATA))) |
1540 | rphy->scsi_target_id = sas_host->next_target_id++; |
1541 | else if (identify->device_type == SAS_END_DEVICE) |
1542 | rphy->scsi_target_id = -1; |
1543 | mutex_unlock(lock: &sas_host->lock); |
1544 | |
1545 | if (identify->device_type == SAS_END_DEVICE && |
1546 | rphy->scsi_target_id != -1) { |
1547 | int lun; |
1548 | |
1549 | if (identify->target_port_protocols & SAS_PROTOCOL_SSP) |
1550 | lun = SCAN_WILD_CARD; |
1551 | else |
1552 | lun = 0; |
1553 | |
1554 | scsi_scan_target(parent: &rphy->dev, channel: 0, id: rphy->scsi_target_id, lun, |
1555 | rescan: SCSI_SCAN_INITIAL); |
1556 | } |
1557 | |
1558 | return 0; |
1559 | } |
1560 | EXPORT_SYMBOL(sas_rphy_add); |
1561 | |
1562 | /** |
1563 | * sas_rphy_free - free a SAS remote PHY |
1564 | * @rphy: SAS remote PHY to free |
1565 | * |
1566 | * Frees the specified SAS remote PHY. |
1567 | * |
1568 | * Note: |
1569 | * This function must only be called on a remote |
1570 | * PHY that has not successfully been added using |
1571 | * sas_rphy_add() (or has been sas_rphy_remove()'d) |
1572 | */ |
1573 | void sas_rphy_free(struct sas_rphy *rphy) |
1574 | { |
1575 | struct device *dev = &rphy->dev; |
1576 | struct Scsi_Host *shost = dev_to_shost(dev: rphy->dev.parent->parent); |
1577 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); |
1578 | |
1579 | mutex_lock(&sas_host->lock); |
1580 | list_del(entry: &rphy->list); |
1581 | mutex_unlock(lock: &sas_host->lock); |
1582 | |
1583 | transport_destroy_device(dev); |
1584 | |
1585 | put_device(dev); |
1586 | } |
1587 | EXPORT_SYMBOL(sas_rphy_free); |
1588 | |
1589 | /** |
1590 | * sas_rphy_delete - remove and free SAS remote PHY |
1591 | * @rphy: SAS remote PHY to remove and free |
1592 | * |
1593 | * Removes the specified SAS remote PHY and frees it. |
1594 | */ |
1595 | void |
1596 | sas_rphy_delete(struct sas_rphy *rphy) |
1597 | { |
1598 | sas_rphy_remove(rphy); |
1599 | sas_rphy_free(rphy); |
1600 | } |
1601 | EXPORT_SYMBOL(sas_rphy_delete); |
1602 | |
1603 | /** |
1604 | * sas_rphy_unlink - unlink SAS remote PHY |
1605 | * @rphy: SAS remote phy to unlink from its parent port |
1606 | * |
1607 | * Removes port reference to an rphy |
1608 | */ |
1609 | void sas_rphy_unlink(struct sas_rphy *rphy) |
1610 | { |
1611 | struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); |
1612 | |
1613 | parent->rphy = NULL; |
1614 | } |
1615 | EXPORT_SYMBOL(sas_rphy_unlink); |
1616 | |
1617 | /** |
1618 | * sas_rphy_remove - remove SAS remote PHY |
1619 | * @rphy: SAS remote phy to remove |
1620 | * |
1621 | * Removes the specified SAS remote PHY. |
1622 | */ |
1623 | void |
1624 | sas_rphy_remove(struct sas_rphy *rphy) |
1625 | { |
1626 | struct device *dev = &rphy->dev; |
1627 | |
1628 | switch (rphy->identify.device_type) { |
1629 | case SAS_END_DEVICE: |
1630 | scsi_remove_target(dev); |
1631 | break; |
1632 | case SAS_EDGE_EXPANDER_DEVICE: |
1633 | case SAS_FANOUT_EXPANDER_DEVICE: |
1634 | sas_remove_children(dev); |
1635 | break; |
1636 | default: |
1637 | break; |
1638 | } |
1639 | |
1640 | sas_rphy_unlink(rphy); |
1641 | bsg_remove_queue(q: rphy->q); |
1642 | transport_remove_device(dev); |
1643 | device_del(dev); |
1644 | } |
1645 | EXPORT_SYMBOL(sas_rphy_remove); |
1646 | |
1647 | /** |
1648 | * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY |
1649 | * @dev: device to check |
1650 | * |
1651 | * Returns: |
1652 | * %1 if the device represents a SAS remote PHY, %0 else |
1653 | */ |
1654 | int scsi_is_sas_rphy(const struct device *dev) |
1655 | { |
1656 | return dev->release == sas_end_device_release || |
1657 | dev->release == sas_expander_release; |
1658 | } |
1659 | EXPORT_SYMBOL(scsi_is_sas_rphy); |
1660 | |
1661 | |
1662 | /* |
1663 | * SCSI scan helper |
1664 | */ |
1665 | |
1666 | static int sas_user_scan(struct Scsi_Host *shost, uint channel, |
1667 | uint id, u64 lun) |
1668 | { |
1669 | struct sas_host_attrs *sas_host = to_sas_host_attrs(shost); |
1670 | struct sas_rphy *rphy; |
1671 | |
1672 | mutex_lock(&sas_host->lock); |
1673 | list_for_each_entry(rphy, &sas_host->rphy_list, list) { |
1674 | if (rphy->identify.device_type != SAS_END_DEVICE || |
1675 | rphy->scsi_target_id == -1) |
1676 | continue; |
1677 | |
1678 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
1679 | (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) { |
1680 | scsi_scan_target(parent: &rphy->dev, channel: 0, id: rphy->scsi_target_id, |
1681 | lun, rescan: SCSI_SCAN_MANUAL); |
1682 | } |
1683 | } |
1684 | mutex_unlock(lock: &sas_host->lock); |
1685 | |
1686 | return 0; |
1687 | } |
1688 | |
1689 | |
1690 | /* |
1691 | * Setup / Teardown code |
1692 | */ |
1693 | |
1694 | #define SETUP_TEMPLATE(attrb, field, perm, test) \ |
1695 | i->private_##attrb[count] = dev_attr_##field; \ |
1696 | i->private_##attrb[count].attr.mode = perm; \ |
1697 | i->attrb[count] = &i->private_##attrb[count]; \ |
1698 | if (test) \ |
1699 | count++ |
1700 | |
1701 | #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \ |
1702 | i->private_##attrb[count] = dev_attr_##field; \ |
1703 | i->private_##attrb[count].attr.mode = perm; \ |
1704 | if (ro_test) { \ |
1705 | i->private_##attrb[count].attr.mode = ro_perm; \ |
1706 | i->private_##attrb[count].store = NULL; \ |
1707 | } \ |
1708 | i->attrb[count] = &i->private_##attrb[count]; \ |
1709 | if (test) \ |
1710 | count++ |
1711 | |
1712 | #define SETUP_RPORT_ATTRIBUTE(field) \ |
1713 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1) |
1714 | |
1715 | #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \ |
1716 | SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func) |
1717 | |
1718 | #define SETUP_PHY_ATTRIBUTE(field) \ |
1719 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1) |
1720 | |
1721 | #define SETUP_PHY_ATTRIBUTE_RW(field) \ |
1722 | SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \ |
1723 | !i->f->set_phy_speed, S_IRUGO) |
1724 | |
1725 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \ |
1726 | SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \ |
1727 | !i->f->func, S_IRUGO) |
1728 | |
1729 | #define SETUP_PORT_ATTRIBUTE(field) \ |
1730 | SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) |
1731 | |
1732 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \ |
1733 | SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func) |
1734 | |
1735 | #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \ |
1736 | SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1) |
1737 | |
1738 | #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \ |
1739 | SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func) |
1740 | |
1741 | #define SETUP_END_DEV_ATTRIBUTE(field) \ |
1742 | SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1) |
1743 | |
1744 | #define SETUP_EXPANDER_ATTRIBUTE(field) \ |
1745 | SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1) |
1746 | |
1747 | /** |
1748 | * sas_attach_transport - instantiate SAS transport template |
1749 | * @ft: SAS transport class function template |
1750 | */ |
1751 | struct scsi_transport_template * |
1752 | sas_attach_transport(struct sas_function_template *ft) |
1753 | { |
1754 | struct sas_internal *i; |
1755 | int count; |
1756 | |
1757 | i = kzalloc(size: sizeof(struct sas_internal), GFP_KERNEL); |
1758 | if (!i) |
1759 | return NULL; |
1760 | |
1761 | i->t.user_scan = sas_user_scan; |
1762 | |
1763 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; |
1764 | i->t.host_attrs.ac.class = &sas_host_class.class; |
1765 | i->t.host_attrs.ac.match = sas_host_match; |
1766 | transport_container_register(tc: &i->t.host_attrs); |
1767 | i->t.host_size = sizeof(struct sas_host_attrs); |
1768 | |
1769 | i->phy_attr_cont.ac.class = &sas_phy_class.class; |
1770 | i->phy_attr_cont.ac.attrs = &i->phy_attrs[0]; |
1771 | i->phy_attr_cont.ac.match = sas_phy_match; |
1772 | transport_container_register(tc: &i->phy_attr_cont); |
1773 | |
1774 | i->port_attr_cont.ac.class = &sas_port_class.class; |
1775 | i->port_attr_cont.ac.attrs = &i->port_attrs[0]; |
1776 | i->port_attr_cont.ac.match = sas_port_match; |
1777 | transport_container_register(tc: &i->port_attr_cont); |
1778 | |
1779 | i->rphy_attr_cont.ac.class = &sas_rphy_class.class; |
1780 | i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0]; |
1781 | i->rphy_attr_cont.ac.match = sas_rphy_match; |
1782 | transport_container_register(tc: &i->rphy_attr_cont); |
1783 | |
1784 | i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class; |
1785 | i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0]; |
1786 | i->end_dev_attr_cont.ac.match = sas_end_dev_match; |
1787 | transport_container_register(tc: &i->end_dev_attr_cont); |
1788 | |
1789 | i->expander_attr_cont.ac.class = &sas_expander_class.class; |
1790 | i->expander_attr_cont.ac.attrs = &i->expander_attrs[0]; |
1791 | i->expander_attr_cont.ac.match = sas_expander_match; |
1792 | transport_container_register(tc: &i->expander_attr_cont); |
1793 | |
1794 | i->f = ft; |
1795 | |
1796 | count = 0; |
1797 | SETUP_PHY_ATTRIBUTE(initiator_port_protocols); |
1798 | SETUP_PHY_ATTRIBUTE(target_port_protocols); |
1799 | SETUP_PHY_ATTRIBUTE(device_type); |
1800 | SETUP_PHY_ATTRIBUTE(sas_address); |
1801 | SETUP_PHY_ATTRIBUTE(phy_identifier); |
1802 | SETUP_PHY_ATTRIBUTE(negotiated_linkrate); |
1803 | SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw); |
1804 | SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate); |
1805 | SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw); |
1806 | SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate); |
1807 | |
1808 | SETUP_PHY_ATTRIBUTE(invalid_dword_count); |
1809 | SETUP_PHY_ATTRIBUTE(running_disparity_error_count); |
1810 | SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count); |
1811 | SETUP_PHY_ATTRIBUTE(phy_reset_problem_count); |
1812 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset); |
1813 | SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset); |
1814 | SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable); |
1815 | i->phy_attrs[count] = NULL; |
1816 | |
1817 | count = 0; |
1818 | SETUP_PORT_ATTRIBUTE(num_phys); |
1819 | i->port_attrs[count] = NULL; |
1820 | |
1821 | count = 0; |
1822 | SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols); |
1823 | SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols); |
1824 | SETUP_RPORT_ATTRIBUTE(rphy_device_type); |
1825 | SETUP_RPORT_ATTRIBUTE(rphy_sas_address); |
1826 | SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier); |
1827 | SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id); |
1828 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier, |
1829 | get_enclosure_identifier); |
1830 | SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier, |
1831 | get_bay_identifier); |
1832 | i->rphy_attrs[count] = NULL; |
1833 | |
1834 | count = 0; |
1835 | SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning); |
1836 | SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout); |
1837 | SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout); |
1838 | SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported); |
1839 | SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled); |
1840 | i->end_dev_attrs[count] = NULL; |
1841 | |
1842 | count = 0; |
1843 | SETUP_EXPANDER_ATTRIBUTE(vendor_id); |
1844 | SETUP_EXPANDER_ATTRIBUTE(product_id); |
1845 | SETUP_EXPANDER_ATTRIBUTE(product_rev); |
1846 | SETUP_EXPANDER_ATTRIBUTE(component_vendor_id); |
1847 | SETUP_EXPANDER_ATTRIBUTE(component_id); |
1848 | SETUP_EXPANDER_ATTRIBUTE(component_revision_id); |
1849 | SETUP_EXPANDER_ATTRIBUTE(level); |
1850 | i->expander_attrs[count] = NULL; |
1851 | |
1852 | return &i->t; |
1853 | } |
1854 | EXPORT_SYMBOL(sas_attach_transport); |
1855 | |
1856 | /** |
1857 | * sas_release_transport - release SAS transport template instance |
1858 | * @t: transport template instance |
1859 | */ |
1860 | void sas_release_transport(struct scsi_transport_template *t) |
1861 | { |
1862 | struct sas_internal *i = to_sas_internal(t); |
1863 | |
1864 | transport_container_unregister(tc: &i->t.host_attrs); |
1865 | transport_container_unregister(tc: &i->phy_attr_cont); |
1866 | transport_container_unregister(tc: &i->port_attr_cont); |
1867 | transport_container_unregister(tc: &i->rphy_attr_cont); |
1868 | transport_container_unregister(tc: &i->end_dev_attr_cont); |
1869 | transport_container_unregister(tc: &i->expander_attr_cont); |
1870 | |
1871 | kfree(objp: i); |
1872 | } |
1873 | EXPORT_SYMBOL(sas_release_transport); |
1874 | |
1875 | static __init int sas_transport_init(void) |
1876 | { |
1877 | int error; |
1878 | |
1879 | error = transport_class_register(&sas_host_class); |
1880 | if (error) |
1881 | goto out; |
1882 | error = transport_class_register(&sas_phy_class); |
1883 | if (error) |
1884 | goto out_unregister_transport; |
1885 | error = transport_class_register(&sas_port_class); |
1886 | if (error) |
1887 | goto out_unregister_phy; |
1888 | error = transport_class_register(&sas_rphy_class); |
1889 | if (error) |
1890 | goto out_unregister_port; |
1891 | error = transport_class_register(&sas_end_dev_class); |
1892 | if (error) |
1893 | goto out_unregister_rphy; |
1894 | error = transport_class_register(&sas_expander_class); |
1895 | if (error) |
1896 | goto out_unregister_end_dev; |
1897 | |
1898 | return 0; |
1899 | |
1900 | out_unregister_end_dev: |
1901 | transport_class_unregister(&sas_end_dev_class); |
1902 | out_unregister_rphy: |
1903 | transport_class_unregister(&sas_rphy_class); |
1904 | out_unregister_port: |
1905 | transport_class_unregister(&sas_port_class); |
1906 | out_unregister_phy: |
1907 | transport_class_unregister(&sas_phy_class); |
1908 | out_unregister_transport: |
1909 | transport_class_unregister(&sas_host_class); |
1910 | out: |
1911 | return error; |
1912 | |
1913 | } |
1914 | |
1915 | static void __exit sas_transport_exit(void) |
1916 | { |
1917 | transport_class_unregister(&sas_host_class); |
1918 | transport_class_unregister(&sas_phy_class); |
1919 | transport_class_unregister(&sas_port_class); |
1920 | transport_class_unregister(&sas_rphy_class); |
1921 | transport_class_unregister(&sas_end_dev_class); |
1922 | transport_class_unregister(&sas_expander_class); |
1923 | } |
1924 | |
1925 | MODULE_AUTHOR("Christoph Hellwig" ); |
1926 | MODULE_DESCRIPTION("SAS Transport Attributes" ); |
1927 | MODULE_LICENSE("GPL" ); |
1928 | |
1929 | module_init(sas_transport_init); |
1930 | module_exit(sas_transport_exit); |
1931 | |