Merge tag 'mvebu' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[linux-2.6-block.git] / drivers / scsi / scsi_transport_sas.c
CommitLineData
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
42struct 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) \
66static ssize_t \
67get_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) \
85static ssize_t \
86set_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) \
103static ssize_t \
104get_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
120static 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};
129sas_bitfield_name_search(device_type, sas_device_type_names)
130
131
132static 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};
141sas_bitfield_name_match(protocol, sas_protocol_names)
142
143static 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" },
d84fd392 154 { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
c7ebbbce
CH
155};
156sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
d24e1eeb 157sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
c7ebbbce 158
0f88009d
JB
159static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
160{
161 struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
162 struct sas_end_device *rdev;
163
164 BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
165
166 rdev = rphy_to_end_device(rphy);
167 return rdev;
168}
169
7aa68e80
FT
170static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
171 struct sas_rphy *rphy)
172{
173 struct request *req;
174 int ret;
175 int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
176
7eaceacc 177 while ((req = blk_fetch_request(q)) != NULL) {
7aa68e80
FT
178 spin_unlock_irq(q->queue_lock);
179
180 handler = to_sas_internal(shost->transportt)->f->smp_handler;
181 ret = handler(shost, rphy, req);
2d507a01 182 req->errors = ret;
7aa68e80 183
93bdcba5 184 blk_end_request_all(req, ret);
7aa68e80 185
93bdcba5 186 spin_lock_irq(q->queue_lock);
7aa68e80
FT
187 }
188}
189
190static void sas_host_smp_request(struct request_queue *q)
191{
192 sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
193}
194
195static void sas_non_host_smp_request(struct request_queue *q)
196{
197 struct sas_rphy *rphy = q->queuedata;
198 sas_smp_request(q, rphy_to_shost(rphy), rphy);
199}
200
93c20a59
FT
201static void sas_host_release(struct device *dev)
202{
203 struct Scsi_Host *shost = dev_to_shost(dev);
204 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
205 struct request_queue *q = sas_host->q;
206
207 if (q)
208 blk_cleanup_queue(q);
209}
210
39dca558 211static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
7aa68e80
FT
212{
213 struct request_queue *q;
214 int error;
39dca558 215 struct device *dev;
71610f55 216 char namebuf[20];
39dca558 217 const char *name;
93c20a59 218 void (*release)(struct device *);
7aa68e80
FT
219
220 if (!to_sas_internal(shost->transportt)->f->smp_handler) {
221 printk("%s can't handle SMP requests\n", shost->hostt->name);
222 return 0;
223 }
224
39dca558 225 if (rphy) {
7aa68e80 226 q = blk_init_queue(sas_non_host_smp_request, NULL);
39dca558 227 dev = &rphy->dev;
71610f55 228 name = dev_name(dev);
93c20a59 229 release = NULL;
39dca558 230 } else {
7aa68e80 231 q = blk_init_queue(sas_host_smp_request, NULL);
39dca558
JB
232 dev = &shost->shost_gendev;
233 snprintf(namebuf, sizeof(namebuf),
234 "sas_host%d", shost->host_no);
235 name = namebuf;
93c20a59 236 release = sas_host_release;
39dca558 237 }
7aa68e80
FT
238 if (!q)
239 return -ENOMEM;
240
93c20a59 241 error = bsg_register_queue(q, dev, name, release);
7aa68e80
FT
242 if (error) {
243 blk_cleanup_queue(q);
244 return -ENOMEM;
245 }
246
b6aff669
JB
247 if (rphy)
248 rphy->q = q;
249 else
250 to_sas_host_attrs(shost)->q = q;
251
7aa68e80
FT
252 if (rphy)
253 q->queuedata = rphy;
254 else
255 q->queuedata = shost;
256
75ad23bc 257 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
7aa68e80
FT
258 return 0;
259}
260
b6aff669
JB
261static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
262{
263 struct request_queue *q;
264
265 if (rphy)
266 q = rphy->q;
267 else
268 q = to_sas_host_attrs(shost)->q;
269
270 if (!q)
271 return;
272
273 bsg_unregister_queue(q);
b6aff669
JB
274}
275
c7ebbbce
CH
276/*
277 * SAS host attributes
278 */
279
37be6eeb 280static int sas_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 281 struct device *cdev)
c7ebbbce
CH
282{
283 struct Scsi_Host *shost = dev_to_shost(dev);
284 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
285
286 INIT_LIST_HEAD(&sas_host->rphy_list);
e02f3f59 287 mutex_init(&sas_host->lock);
c7ebbbce 288 sas_host->next_target_id = 0;
79cb1819 289 sas_host->next_expander_id = 0;
c9fefeb2 290 sas_host->next_port_id = 0;
7aa68e80 291
39dca558 292 if (sas_bsg_initialize(shost, NULL))
7aa68e80
FT
293 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
294 shost->host_no);
295
c7ebbbce
CH
296 return 0;
297}
298
b6aff669 299static int sas_host_remove(struct transport_container *tc, struct device *dev,
ee959b00 300 struct device *cdev)
b6aff669
JB
301{
302 struct Scsi_Host *shost = dev_to_shost(dev);
303
304 sas_bsg_remove(shost, NULL);
305
306 return 0;
307}
308
c7ebbbce 309static DECLARE_TRANSPORT_CLASS(sas_host_class,
b6aff669 310 "sas_host", sas_host_setup, sas_host_remove, NULL);
c7ebbbce
CH
311
312static int sas_host_match(struct attribute_container *cont,
313 struct device *dev)
314{
315 struct Scsi_Host *shost;
316 struct sas_internal *i;
317
318 if (!scsi_is_host_device(dev))
319 return 0;
320 shost = dev_to_shost(dev);
321
322 if (!shost->transportt)
323 return 0;
324 if (shost->transportt->host_attrs.ac.class !=
325 &sas_host_class.class)
326 return 0;
327
328 i = to_sas_internal(shost->transportt);
329 return &i->t.host_attrs.ac == cont;
330}
331
332static int do_sas_phy_delete(struct device *dev, void *data)
333{
65c92b09
JB
334 int pass = (int)(unsigned long)data;
335
336 if (pass == 0 && scsi_is_sas_port(dev))
337 sas_port_delete(dev_to_sas_port(dev));
338 else if (pass == 1 && scsi_is_sas_phy(dev))
c7ebbbce
CH
339 sas_phy_delete(dev_to_phy(dev));
340 return 0;
341}
342
65c92b09 343/**
eb44820c 344 * sas_remove_children - tear down a devices SAS data structures
65c92b09
JB
345 * @dev: device belonging to the sas object
346 *
347 * Removes all SAS PHYs and remote PHYs for a given object
348 */
349void sas_remove_children(struct device *dev)
350{
351 device_for_each_child(dev, (void *)0, do_sas_phy_delete);
352 device_for_each_child(dev, (void *)1, do_sas_phy_delete);
353}
354EXPORT_SYMBOL(sas_remove_children);
355
c7ebbbce 356/**
eb44820c 357 * sas_remove_host - tear down a Scsi_Host's SAS data structures
c7ebbbce
CH
358 * @shost: Scsi Host that is torn down
359 *
360 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
361 * Must be called just before scsi_remove_host for SAS HBAs.
362 */
363void sas_remove_host(struct Scsi_Host *shost)
364{
65c92b09 365 sas_remove_children(&shost->shost_gendev);
c7ebbbce
CH
366}
367EXPORT_SYMBOL(sas_remove_host);
368
0f88009d
JB
369/**
370 * sas_tlr_supported - checking TLR bit in vpd 0x90
371 * @sdev: scsi device struct
372 *
373 * Check Transport Layer Retries are supported or not.
374 * If vpd page 0x90 is present, TRL is supported.
375 *
376 */
377unsigned int
378sas_tlr_supported(struct scsi_device *sdev)
379{
380 const int vpd_len = 32;
381 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
382 char *buffer = kzalloc(vpd_len, GFP_KERNEL);
383 int ret = 0;
384
385 if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
386 goto out;
387
388 /*
389 * Magic numbers: the VPD Protocol page (0x90)
390 * has a 4 byte header and then one entry per device port
391 * the TLR bit is at offset 8 on each port entry
392 * if we take the first port, that's at total offset 12
393 */
394 ret = buffer[12] & 0x01;
395
396 out:
397 kfree(buffer);
398 rdev->tlr_supported = ret;
399 return ret;
400
401}
402EXPORT_SYMBOL_GPL(sas_tlr_supported);
403
404/**
405 * sas_disable_tlr - setting TLR flags
406 * @sdev: scsi device struct
407 *
408 * Seting tlr_enabled flag to 0.
409 *
410 */
411void
412sas_disable_tlr(struct scsi_device *sdev)
413{
414 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
415
416 rdev->tlr_enabled = 0;
417}
418EXPORT_SYMBOL_GPL(sas_disable_tlr);
419
420/**
421 * sas_enable_tlr - setting TLR flags
422 * @sdev: scsi device struct
423 *
424 * Seting tlr_enabled flag 1.
425 *
426 */
427void sas_enable_tlr(struct scsi_device *sdev)
428{
429 unsigned int tlr_supported = 0;
430 tlr_supported = sas_tlr_supported(sdev);
431
432 if (tlr_supported) {
433 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
434
435 rdev->tlr_enabled = 1;
436 }
437
438 return;
439}
440EXPORT_SYMBOL_GPL(sas_enable_tlr);
441
442unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
443{
444 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
445 return rdev->tlr_enabled;
446}
447EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
c7ebbbce
CH
448
449/*
65c92b09 450 * SAS Phy attributes
c7ebbbce
CH
451 */
452
453#define sas_phy_show_simple(field, name, format_string, cast) \
454static ssize_t \
ee959b00
TJ
455show_sas_phy_##name(struct device *dev, \
456 struct device_attribute *attr, char *buf) \
c7ebbbce 457{ \
ee959b00 458 struct sas_phy *phy = transport_class_to_phy(dev); \
c7ebbbce
CH
459 \
460 return snprintf(buf, 20, format_string, cast phy->field); \
461}
462
463#define sas_phy_simple_attr(field, name, format_string, type) \
464 sas_phy_show_simple(field, name, format_string, (type)) \
ee959b00 465static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
c7ebbbce
CH
466
467#define sas_phy_show_protocol(field, name) \
468static ssize_t \
ee959b00
TJ
469show_sas_phy_##name(struct device *dev, \
470 struct device_attribute *attr, char *buf) \
c7ebbbce 471{ \
ee959b00 472 struct sas_phy *phy = transport_class_to_phy(dev); \
c7ebbbce
CH
473 \
474 if (!phy->field) \
475 return snprintf(buf, 20, "none\n"); \
476 return get_sas_protocol_names(phy->field, buf); \
477}
478
479#define sas_phy_protocol_attr(field, name) \
480 sas_phy_show_protocol(field, name) \
ee959b00 481static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
c7ebbbce
CH
482
483#define sas_phy_show_linkspeed(field) \
484static ssize_t \
ee959b00
TJ
485show_sas_phy_##field(struct device *dev, \
486 struct device_attribute *attr, char *buf) \
c7ebbbce 487{ \
ee959b00 488 struct sas_phy *phy = transport_class_to_phy(dev); \
c7ebbbce
CH
489 \
490 return get_sas_linkspeed_names(phy->field, buf); \
491}
492
d24e1eeb
JB
493/* Fudge to tell if we're minimum or maximum */
494#define sas_phy_store_linkspeed(field) \
495static ssize_t \
ee959b00
TJ
496store_sas_phy_##field(struct device *dev, \
497 struct device_attribute *attr, \
498 const char *buf, size_t count) \
d24e1eeb 499{ \
ee959b00 500 struct sas_phy *phy = transport_class_to_phy(dev); \
d24e1eeb
JB
501 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
502 struct sas_internal *i = to_sas_internal(shost->transportt); \
503 u32 value; \
504 struct sas_phy_linkrates rates = {0}; \
505 int error; \
506 \
507 error = set_sas_linkspeed_names(&value, buf); \
508 if (error) \
509 return error; \
510 rates.field = value; \
511 error = i->f->set_phy_speed(phy, &rates); \
512 \
513 return error ? error : count; \
514}
515
516#define sas_phy_linkspeed_rw_attr(field) \
517 sas_phy_show_linkspeed(field) \
518 sas_phy_store_linkspeed(field) \
ee959b00 519static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
d24e1eeb
JB
520 store_sas_phy_##field)
521
c7ebbbce
CH
522#define sas_phy_linkspeed_attr(field) \
523 sas_phy_show_linkspeed(field) \
ee959b00 524static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
c7ebbbce 525
d24e1eeb 526
c3ee74c4
CH
527#define sas_phy_show_linkerror(field) \
528static ssize_t \
ee959b00
TJ
529show_sas_phy_##field(struct device *dev, \
530 struct device_attribute *attr, char *buf) \
c3ee74c4 531{ \
ee959b00 532 struct sas_phy *phy = transport_class_to_phy(dev); \
c3ee74c4
CH
533 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
534 struct sas_internal *i = to_sas_internal(shost->transportt); \
535 int error; \
536 \
dd9fbb52 537 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
c3ee74c4
CH
538 if (error) \
539 return error; \
540 return snprintf(buf, 20, "%u\n", phy->field); \
541}
542
543#define sas_phy_linkerror_attr(field) \
544 sas_phy_show_linkerror(field) \
ee959b00 545static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
c3ee74c4
CH
546
547
c7ebbbce 548static ssize_t
ee959b00
TJ
549show_sas_device_type(struct device *dev,
550 struct device_attribute *attr, char *buf)
c7ebbbce 551{
ee959b00 552 struct sas_phy *phy = transport_class_to_phy(dev);
c7ebbbce
CH
553
554 if (!phy->identify.device_type)
555 return snprintf(buf, 20, "none\n");
556 return get_sas_device_type_names(phy->identify.device_type, buf);
557}
ee959b00 558static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
c7ebbbce 559
ee959b00 560static ssize_t do_sas_phy_enable(struct device *dev,
acbf167d
DW
561 size_t count, int enable)
562{
ee959b00 563 struct sas_phy *phy = transport_class_to_phy(dev);
acbf167d
DW
564 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
565 struct sas_internal *i = to_sas_internal(shost->transportt);
566 int error;
567
568 error = i->f->phy_enable(phy, enable);
569 if (error)
570 return error;
571 phy->enabled = enable;
572 return count;
573};
574
ee959b00
TJ
575static ssize_t
576store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
577 const char *buf, size_t count)
acbf167d
DW
578{
579 if (count < 1)
580 return -EINVAL;
581
582 switch (buf[0]) {
583 case '0':
ee959b00 584 do_sas_phy_enable(dev, count, 0);
acbf167d
DW
585 break;
586 case '1':
ee959b00 587 do_sas_phy_enable(dev, count, 1);
acbf167d
DW
588 break;
589 default:
590 return -EINVAL;
591 }
592
593 return count;
594}
595
ee959b00
TJ
596static ssize_t
597show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
598 char *buf)
acbf167d 599{
ee959b00 600 struct sas_phy *phy = transport_class_to_phy(dev);
acbf167d
DW
601
602 return snprintf(buf, 20, "%d", phy->enabled);
603}
604
ee959b00 605static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
acbf167d
DW
606 store_sas_phy_enable);
607
ee959b00
TJ
608static ssize_t
609do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
07ba3a95 610{
ee959b00 611 struct sas_phy *phy = transport_class_to_phy(dev);
07ba3a95
CH
612 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
613 struct sas_internal *i = to_sas_internal(shost->transportt);
614 int error;
615
07ba3a95
CH
616 error = i->f->phy_reset(phy, hard_reset);
617 if (error)
618 return error;
16d3db1b 619 phy->enabled = 1;
07ba3a95
CH
620 return count;
621};
622
ee959b00
TJ
623static ssize_t
624store_sas_link_reset(struct device *dev, struct device_attribute *attr,
625 const char *buf, size_t count)
07ba3a95 626{
ee959b00 627 return do_sas_phy_reset(dev, count, 0);
07ba3a95 628}
ee959b00 629static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
07ba3a95 630
ee959b00
TJ
631static ssize_t
632store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
633 const char *buf, size_t count)
07ba3a95 634{
ee959b00 635 return do_sas_phy_reset(dev, count, 1);
07ba3a95 636}
ee959b00 637static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
07ba3a95 638
c7ebbbce
CH
639sas_phy_protocol_attr(identify.initiator_port_protocols,
640 initiator_port_protocols);
641sas_phy_protocol_attr(identify.target_port_protocols,
642 target_port_protocols);
643sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
644 unsigned long long);
645sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
c9fefeb2 646//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
c7ebbbce
CH
647sas_phy_linkspeed_attr(negotiated_linkrate);
648sas_phy_linkspeed_attr(minimum_linkrate_hw);
d24e1eeb 649sas_phy_linkspeed_rw_attr(minimum_linkrate);
c7ebbbce 650sas_phy_linkspeed_attr(maximum_linkrate_hw);
d24e1eeb 651sas_phy_linkspeed_rw_attr(maximum_linkrate);
c3ee74c4
CH
652sas_phy_linkerror_attr(invalid_dword_count);
653sas_phy_linkerror_attr(running_disparity_error_count);
654sas_phy_linkerror_attr(loss_of_dword_sync_count);
655sas_phy_linkerror_attr(phy_reset_problem_count);
c7ebbbce 656
0b3e09da
DW
657static int sas_phy_setup(struct transport_container *tc, struct device *dev,
658 struct device *cdev)
659{
660 struct sas_phy *phy = dev_to_phy(dev);
661 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
662 struct sas_internal *i = to_sas_internal(shost->transportt);
663
664 if (i->f->phy_setup)
665 i->f->phy_setup(phy);
666
667 return 0;
668}
c7ebbbce
CH
669
670static DECLARE_TRANSPORT_CLASS(sas_phy_class,
0b3e09da 671 "sas_phy", sas_phy_setup, NULL, NULL);
c7ebbbce
CH
672
673static int sas_phy_match(struct attribute_container *cont, struct device *dev)
674{
675 struct Scsi_Host *shost;
676 struct sas_internal *i;
677
678 if (!scsi_is_sas_phy(dev))
679 return 0;
680 shost = dev_to_shost(dev->parent);
681
682 if (!shost->transportt)
683 return 0;
684 if (shost->transportt->host_attrs.ac.class !=
685 &sas_host_class.class)
686 return 0;
687
688 i = to_sas_internal(shost->transportt);
689 return &i->phy_attr_cont.ac == cont;
690}
691
692static void sas_phy_release(struct device *dev)
693{
694 struct sas_phy *phy = dev_to_phy(dev);
0b3e09da
DW
695 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
696 struct sas_internal *i = to_sas_internal(shost->transportt);
c7ebbbce 697
0b3e09da
DW
698 if (i->f->phy_release)
699 i->f->phy_release(phy);
c7ebbbce
CH
700 put_device(dev->parent);
701 kfree(phy);
702}
703
704/**
eb44820c 705 * sas_phy_alloc - allocates and initialize a SAS PHY structure
c7ebbbce 706 * @parent: Parent device
d99ca418 707 * @number: Phy index
c7ebbbce
CH
708 *
709 * Allocates an SAS PHY structure. It will be added in the device tree
710 * below the device specified by @parent, which has to be either a Scsi_Host
711 * or sas_rphy.
712 *
713 * Returns:
714 * SAS PHY allocated or %NULL if the allocation failed.
715 */
716struct sas_phy *sas_phy_alloc(struct device *parent, int number)
717{
718 struct Scsi_Host *shost = dev_to_shost(parent);
719 struct sas_phy *phy;
720
24669f75 721 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
c7ebbbce
CH
722 if (!phy)
723 return NULL;
c7ebbbce 724
c7ebbbce 725 phy->number = number;
acbf167d 726 phy->enabled = 1;
c7ebbbce
CH
727
728 device_initialize(&phy->dev);
729 phy->dev.parent = get_device(parent);
730 phy->dev.release = sas_phy_release;
65c92b09 731 INIT_LIST_HEAD(&phy->port_siblings);
79cb1819
JB
732 if (scsi_is_sas_expander_device(parent)) {
733 struct sas_rphy *rphy = dev_to_rphy(parent);
71610f55 734 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
79cb1819
JB
735 rphy->scsi_target_id, number);
736 } else
71610f55 737 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
c7ebbbce
CH
738
739 transport_setup_device(&phy->dev);
740
741 return phy;
742}
743EXPORT_SYMBOL(sas_phy_alloc);
744
745/**
eb44820c 746 * sas_phy_add - add a SAS PHY to the device hierarchy
c7ebbbce
CH
747 * @phy: The PHY to be added
748 *
749 * Publishes a SAS PHY to the rest of the system.
750 */
751int sas_phy_add(struct sas_phy *phy)
752{
753 int error;
754
755 error = device_add(&phy->dev);
756 if (!error) {
757 transport_add_device(&phy->dev);
758 transport_configure_device(&phy->dev);
759 }
760
761 return error;
762}
763EXPORT_SYMBOL(sas_phy_add);
764
765/**
eb44820c 766 * sas_phy_free - free a SAS PHY
c7ebbbce
CH
767 * @phy: SAS PHY to free
768 *
769 * Frees the specified SAS PHY.
770 *
771 * Note:
772 * This function must only be called on a PHY that has not
af901ca1 773 * successfully been added using sas_phy_add().
c7ebbbce
CH
774 */
775void sas_phy_free(struct sas_phy *phy)
776{
777 transport_destroy_device(&phy->dev);
92aab646 778 put_device(&phy->dev);
c7ebbbce
CH
779}
780EXPORT_SYMBOL(sas_phy_free);
781
782/**
eb44820c 783 * sas_phy_delete - remove SAS PHY
c7ebbbce
CH
784 * @phy: SAS PHY to remove
785 *
786 * Removes the specified SAS PHY. If the SAS PHY has an
787 * associated remote PHY it is removed before.
788 */
789void
790sas_phy_delete(struct sas_phy *phy)
791{
792 struct device *dev = &phy->dev;
793
65c92b09
JB
794 /* this happens if the phy is still part of a port when deleted */
795 BUG_ON(!list_empty(&phy->port_siblings));
c7ebbbce
CH
796
797 transport_remove_device(dev);
798 device_del(dev);
799 transport_destroy_device(dev);
92aab646 800 put_device(dev);
c7ebbbce
CH
801}
802EXPORT_SYMBOL(sas_phy_delete);
803
804/**
eb44820c 805 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
c7ebbbce
CH
806 * @dev: device to check
807 *
808 * Returns:
809 * %1 if the device represents a SAS PHY, %0 else
810 */
811int scsi_is_sas_phy(const struct device *dev)
812{
813 return dev->release == sas_phy_release;
814}
815EXPORT_SYMBOL(scsi_is_sas_phy);
816
65c92b09
JB
817/*
818 * SAS Port attributes
819 */
820#define sas_port_show_simple(field, name, format_string, cast) \
821static ssize_t \
ee959b00
TJ
822show_sas_port_##name(struct device *dev, \
823 struct device_attribute *attr, char *buf) \
65c92b09 824{ \
ee959b00 825 struct sas_port *port = transport_class_to_sas_port(dev); \
65c92b09
JB
826 \
827 return snprintf(buf, 20, format_string, cast port->field); \
828}
829
830#define sas_port_simple_attr(field, name, format_string, type) \
831 sas_port_show_simple(field, name, format_string, (type)) \
ee959b00 832static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
65c92b09
JB
833
834sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
835
836static DECLARE_TRANSPORT_CLASS(sas_port_class,
837 "sas_port", NULL, NULL, NULL);
838
839static int sas_port_match(struct attribute_container *cont, struct device *dev)
840{
841 struct Scsi_Host *shost;
842 struct sas_internal *i;
843
844 if (!scsi_is_sas_port(dev))
845 return 0;
846 shost = dev_to_shost(dev->parent);
847
848 if (!shost->transportt)
849 return 0;
850 if (shost->transportt->host_attrs.ac.class !=
851 &sas_host_class.class)
852 return 0;
853
854 i = to_sas_internal(shost->transportt);
855 return &i->port_attr_cont.ac == cont;
856}
857
858
859static void sas_port_release(struct device *dev)
860{
861 struct sas_port *port = dev_to_sas_port(dev);
862
863 BUG_ON(!list_empty(&port->phy_list));
864
865 put_device(dev->parent);
866 kfree(port);
867}
868
869static void sas_port_create_link(struct sas_port *port,
870 struct sas_phy *phy)
871{
21434966
DW
872 int res;
873
874 res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
71610f55 875 dev_name(&phy->dev));
21434966
DW
876 if (res)
877 goto err;
878 res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
879 if (res)
880 goto err;
881 return;
882err:
883 printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
cadbd4a5 884 __func__, res);
65c92b09
JB
885}
886
887static void sas_port_delete_link(struct sas_port *port,
888 struct sas_phy *phy)
889{
71610f55 890 sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
65c92b09
JB
891 sysfs_remove_link(&phy->dev.kobj, "port");
892}
893
894/** sas_port_alloc - allocate and initialize a SAS port structure
895 *
896 * @parent: parent device
897 * @port_id: port number
898 *
899 * Allocates a SAS port structure. It will be added to the device tree
900 * below the device specified by @parent which must be either a Scsi_Host
901 * or a sas_expander_device.
902 *
903 * Returns %NULL on error
904 */
905struct sas_port *sas_port_alloc(struct device *parent, int port_id)
906{
907 struct Scsi_Host *shost = dev_to_shost(parent);
908 struct sas_port *port;
909
910 port = kzalloc(sizeof(*port), GFP_KERNEL);
911 if (!port)
912 return NULL;
913
914 port->port_identifier = port_id;
915
916 device_initialize(&port->dev);
917
918 port->dev.parent = get_device(parent);
919 port->dev.release = sas_port_release;
920
921 mutex_init(&port->phy_list_mutex);
922 INIT_LIST_HEAD(&port->phy_list);
923
924 if (scsi_is_sas_expander_device(parent)) {
925 struct sas_rphy *rphy = dev_to_rphy(parent);
71610f55
KS
926 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
927 rphy->scsi_target_id, port->port_identifier);
65c92b09 928 } else
71610f55
KS
929 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
930 port->port_identifier);
65c92b09
JB
931
932 transport_setup_device(&port->dev);
933
934 return port;
935}
936EXPORT_SYMBOL(sas_port_alloc);
937
c9fefeb2
JB
938/** sas_port_alloc_num - allocate and initialize a SAS port structure
939 *
940 * @parent: parent device
941 *
942 * Allocates a SAS port structure and a number to go with it. This
943 * interface is really for adapters where the port number has no
944 * meansing, so the sas class should manage them. It will be added to
945 * the device tree below the device specified by @parent which must be
946 * either a Scsi_Host or a sas_expander_device.
947 *
948 * Returns %NULL on error
949 */
950struct sas_port *sas_port_alloc_num(struct device *parent)
951{
952 int index;
953 struct Scsi_Host *shost = dev_to_shost(parent);
954 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
955
956 /* FIXME: use idr for this eventually */
957 mutex_lock(&sas_host->lock);
958 if (scsi_is_sas_expander_device(parent)) {
959 struct sas_rphy *rphy = dev_to_rphy(parent);
960 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
961
962 index = exp->next_port_id++;
963 } else
964 index = sas_host->next_port_id++;
965 mutex_unlock(&sas_host->lock);
966 return sas_port_alloc(parent, index);
967}
968EXPORT_SYMBOL(sas_port_alloc_num);
969
65c92b09
JB
970/**
971 * sas_port_add - add a SAS port to the device hierarchy
65c92b09
JB
972 * @port: port to be added
973 *
974 * publishes a port to the rest of the system
975 */
976int sas_port_add(struct sas_port *port)
977{
978 int error;
979
980 /* No phys should be added until this is made visible */
981 BUG_ON(!list_empty(&port->phy_list));
982
983 error = device_add(&port->dev);
984
985 if (error)
986 return error;
987
988 transport_add_device(&port->dev);
989 transport_configure_device(&port->dev);
990
991 return 0;
992}
993EXPORT_SYMBOL(sas_port_add);
994
995/**
eb44820c 996 * sas_port_free - free a SAS PORT
65c92b09
JB
997 * @port: SAS PORT to free
998 *
999 * Frees the specified SAS PORT.
1000 *
1001 * Note:
1002 * This function must only be called on a PORT that has not
af901ca1 1003 * successfully been added using sas_port_add().
65c92b09
JB
1004 */
1005void sas_port_free(struct sas_port *port)
1006{
1007 transport_destroy_device(&port->dev);
1008 put_device(&port->dev);
1009}
1010EXPORT_SYMBOL(sas_port_free);
1011
1012/**
eb44820c 1013 * sas_port_delete - remove SAS PORT
65c92b09
JB
1014 * @port: SAS PORT to remove
1015 *
1016 * Removes the specified SAS PORT. If the SAS PORT has an
1017 * associated phys, unlink them from the port as well.
1018 */
1019void sas_port_delete(struct sas_port *port)
1020{
1021 struct device *dev = &port->dev;
1022 struct sas_phy *phy, *tmp_phy;
1023
1024 if (port->rphy) {
1025 sas_rphy_delete(port->rphy);
1026 port->rphy = NULL;
1027 }
1028
1029 mutex_lock(&port->phy_list_mutex);
1030 list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1031 port_siblings) {
1032 sas_port_delete_link(port, phy);
1033 list_del_init(&phy->port_siblings);
1034 }
1035 mutex_unlock(&port->phy_list_mutex);
1036
a0e1b6ef
JB
1037 if (port->is_backlink) {
1038 struct device *parent = port->dev.parent;
1039
71610f55 1040 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
a0e1b6ef
JB
1041 port->is_backlink = 0;
1042 }
1043
65c92b09
JB
1044 transport_remove_device(dev);
1045 device_del(dev);
1046 transport_destroy_device(dev);
1047 put_device(dev);
1048}
1049EXPORT_SYMBOL(sas_port_delete);
1050
1051/**
eb44820c 1052 * scsi_is_sas_port - check if a struct device represents a SAS port
65c92b09
JB
1053 * @dev: device to check
1054 *
1055 * Returns:
1056 * %1 if the device represents a SAS Port, %0 else
1057 */
1058int scsi_is_sas_port(const struct device *dev)
1059{
1060 return dev->release == sas_port_release;
1061}
1062EXPORT_SYMBOL(scsi_is_sas_port);
1063
f41a0c44
DW
1064/**
1065 * sas_port_get_phy - try to take a reference on a port member
1066 * @port: port to check
1067 */
1068struct sas_phy *sas_port_get_phy(struct sas_port *port)
1069{
1070 struct sas_phy *phy;
1071
1072 mutex_lock(&port->phy_list_mutex);
1073 if (list_empty(&port->phy_list))
1074 phy = NULL;
1075 else {
1076 struct list_head *ent = port->phy_list.next;
1077
1078 phy = list_entry(ent, typeof(*phy), port_siblings);
1079 get_device(&phy->dev);
1080 }
1081 mutex_unlock(&port->phy_list_mutex);
1082
1083 return phy;
1084}
1085EXPORT_SYMBOL(sas_port_get_phy);
1086
65c92b09
JB
1087/**
1088 * sas_port_add_phy - add another phy to a port to form a wide port
1089 * @port: port to add the phy to
1090 * @phy: phy to add
1091 *
1092 * When a port is initially created, it is empty (has no phys). All
1093 * ports must have at least one phy to operated, and all wide ports
1094 * must have at least two. The current code makes no difference
1095 * between ports and wide ports, but the only object that can be
1096 * connected to a remote device is a port, so ports must be formed on
1097 * all devices with phys if they're connected to anything.
1098 */
1099void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1100{
1101 mutex_lock(&port->phy_list_mutex);
1102 if (unlikely(!list_empty(&phy->port_siblings))) {
1103 /* make sure we're already on this port */
1104 struct sas_phy *tmp;
1105
1106 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1107 if (tmp == phy)
1108 break;
1109 /* If this trips, you added a phy that was already
1110 * part of a different port */
1111 if (unlikely(tmp != phy)) {
71610f55
KS
1112 dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1113 dev_name(&phy->dev));
65c92b09
JB
1114 BUG();
1115 }
1116 } else {
1117 sas_port_create_link(port, phy);
1118 list_add_tail(&phy->port_siblings, &port->phy_list);
1119 port->num_phys++;
1120 }
1121 mutex_unlock(&port->phy_list_mutex);
1122}
1123EXPORT_SYMBOL(sas_port_add_phy);
1124
1125/**
1126 * sas_port_delete_phy - remove a phy from a port or wide port
1127 * @port: port to remove the phy from
1128 * @phy: phy to remove
1129 *
1130 * This operation is used for tearing down ports again. It must be
1131 * done to every port or wide port before calling sas_port_delete.
1132 */
1133void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1134{
1135 mutex_lock(&port->phy_list_mutex);
1136 sas_port_delete_link(port, phy);
1137 list_del_init(&phy->port_siblings);
1138 port->num_phys--;
1139 mutex_unlock(&port->phy_list_mutex);
1140}
1141EXPORT_SYMBOL(sas_port_delete_phy);
1142
a0e1b6ef
JB
1143void sas_port_mark_backlink(struct sas_port *port)
1144{
21434966 1145 int res;
a0e1b6ef
JB
1146 struct device *parent = port->dev.parent->parent->parent;
1147
1148 if (port->is_backlink)
1149 return;
1150 port->is_backlink = 1;
21434966 1151 res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
71610f55 1152 dev_name(parent));
21434966
DW
1153 if (res)
1154 goto err;
1155 return;
1156err:
1157 printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
cadbd4a5 1158 __func__, res);
a0e1b6ef
JB
1159
1160}
1161EXPORT_SYMBOL(sas_port_mark_backlink);
1162
c7ebbbce
CH
1163/*
1164 * SAS remote PHY attributes.
1165 */
1166
1167#define sas_rphy_show_simple(field, name, format_string, cast) \
1168static ssize_t \
ee959b00
TJ
1169show_sas_rphy_##name(struct device *dev, \
1170 struct device_attribute *attr, char *buf) \
c7ebbbce 1171{ \
ee959b00 1172 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
c7ebbbce
CH
1173 \
1174 return snprintf(buf, 20, format_string, cast rphy->field); \
1175}
1176
1177#define sas_rphy_simple_attr(field, name, format_string, type) \
1178 sas_rphy_show_simple(field, name, format_string, (type)) \
ee959b00 1179static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
c7ebbbce
CH
1180 show_sas_rphy_##name, NULL)
1181
1182#define sas_rphy_show_protocol(field, name) \
1183static ssize_t \
ee959b00
TJ
1184show_sas_rphy_##name(struct device *dev, \
1185 struct device_attribute *attr, char *buf) \
c7ebbbce 1186{ \
ee959b00 1187 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
c7ebbbce
CH
1188 \
1189 if (!rphy->field) \
1190 return snprintf(buf, 20, "none\n"); \
1191 return get_sas_protocol_names(rphy->field, buf); \
1192}
1193
1194#define sas_rphy_protocol_attr(field, name) \
1195 sas_rphy_show_protocol(field, name) \
ee959b00 1196static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
c7ebbbce
CH
1197 show_sas_rphy_##name, NULL)
1198
1199static ssize_t
ee959b00
TJ
1200show_sas_rphy_device_type(struct device *dev,
1201 struct device_attribute *attr, char *buf)
c7ebbbce 1202{
ee959b00 1203 struct sas_rphy *rphy = transport_class_to_rphy(dev);
c7ebbbce
CH
1204
1205 if (!rphy->identify.device_type)
1206 return snprintf(buf, 20, "none\n");
1207 return get_sas_device_type_names(
1208 rphy->identify.device_type, buf);
1209}
1210
ee959b00 1211static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
c7ebbbce
CH
1212 show_sas_rphy_device_type, NULL);
1213
a0125641 1214static ssize_t
ee959b00
TJ
1215show_sas_rphy_enclosure_identifier(struct device *dev,
1216 struct device_attribute *attr, char *buf)
a0125641 1217{
ee959b00 1218 struct sas_rphy *rphy = transport_class_to_rphy(dev);
a0125641
CH
1219 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1220 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1221 struct sas_internal *i = to_sas_internal(shost->transportt);
1222 u64 identifier;
1223 int error;
1224
1225 /*
1226 * Only devices behind an expander are supported, because the
1227 * enclosure identifier is a SMP feature.
1228 */
f4ad7b58 1229 if (scsi_is_sas_phy_local(phy))
a0125641
CH
1230 return -EINVAL;
1231
1232 error = i->f->get_enclosure_identifier(rphy, &identifier);
1233 if (error)
1234 return error;
1235 return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1236}
1237
ee959b00 1238static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
a0125641
CH
1239 show_sas_rphy_enclosure_identifier, NULL);
1240
1241static ssize_t
ee959b00
TJ
1242show_sas_rphy_bay_identifier(struct device *dev,
1243 struct device_attribute *attr, char *buf)
a0125641 1244{
ee959b00 1245 struct sas_rphy *rphy = transport_class_to_rphy(dev);
a0125641
CH
1246 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1247 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1248 struct sas_internal *i = to_sas_internal(shost->transportt);
1249 int val;
1250
f4ad7b58 1251 if (scsi_is_sas_phy_local(phy))
a0125641
CH
1252 return -EINVAL;
1253
1254 val = i->f->get_bay_identifier(rphy);
1255 if (val < 0)
1256 return val;
1257 return sprintf(buf, "%d\n", val);
1258}
1259
ee959b00 1260static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
a0125641
CH
1261 show_sas_rphy_bay_identifier, NULL);
1262
c7ebbbce
CH
1263sas_rphy_protocol_attr(identify.initiator_port_protocols,
1264 initiator_port_protocols);
1265sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1266sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1267 unsigned long long);
1268sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1269
42ab0360
JB
1270/* only need 8 bytes of data plus header (4 or 8) */
1271#define BUF_SIZE 64
1272
1273int sas_read_port_mode_page(struct scsi_device *sdev)
1274{
1275 char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
0f88009d 1276 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
42ab0360
JB
1277 struct scsi_mode_data mode_data;
1278 int res, error;
1279
42ab0360
JB
1280 if (!buffer)
1281 return -ENOMEM;
1282
1283 res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1284 &mode_data, NULL);
1285
1286 error = -EINVAL;
1287 if (!scsi_status_is_good(res))
1288 goto out;
1289
1290 msdata = buffer + mode_data.header_length +
1291 mode_data.block_descriptor_length;
1292
1293 if (msdata - buffer > BUF_SIZE - 8)
1294 goto out;
1295
1296 error = 0;
1297
1298 rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1299 rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1300 rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1301
1302 out:
1303 kfree(buffer);
1304 return error;
1305}
1306EXPORT_SYMBOL(sas_read_port_mode_page);
1307
79cb1819
JB
1308static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1309 "sas_end_device", NULL, NULL, NULL);
1310
42ab0360
JB
1311#define sas_end_dev_show_simple(field, name, format_string, cast) \
1312static ssize_t \
ee959b00
TJ
1313show_sas_end_dev_##name(struct device *dev, \
1314 struct device_attribute *attr, char *buf) \
42ab0360 1315{ \
ee959b00 1316 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
42ab0360
JB
1317 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1318 \
1319 return snprintf(buf, 20, format_string, cast rdev->field); \
1320}
1321
1322#define sas_end_dev_simple_attr(field, name, format_string, type) \
1323 sas_end_dev_show_simple(field, name, format_string, (type)) \
ee959b00 1324static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
42ab0360
JB
1325 show_sas_end_dev_##name, NULL)
1326
1327sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1328sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1329 "%d\n", int);
1330sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1331 "%d\n", int);
0f88009d
JB
1332sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1333 "%d\n", int);
1334sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1335 "%d\n", int);
42ab0360 1336
79cb1819
JB
1337static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1338 "sas_expander", NULL, NULL, NULL);
1339
1340#define sas_expander_show_simple(field, name, format_string, cast) \
1341static ssize_t \
ee959b00
TJ
1342show_sas_expander_##name(struct device *dev, \
1343 struct device_attribute *attr, char *buf) \
79cb1819 1344{ \
ee959b00 1345 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
79cb1819
JB
1346 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1347 \
1348 return snprintf(buf, 20, format_string, cast edev->field); \
1349}
1350
1351#define sas_expander_simple_attr(field, name, format_string, type) \
1352 sas_expander_show_simple(field, name, format_string, (type)) \
ee959b00 1353static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
79cb1819
JB
1354 show_sas_expander_##name, NULL)
1355
1356sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1357sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1358sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1359sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1360 "%s\n", char *);
1361sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1362sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1363 unsigned int);
1364sas_expander_simple_attr(level, level, "%d\n", int);
42ab0360 1365
c7ebbbce 1366static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
2f8600df 1367 "sas_device", NULL, NULL, NULL);
c7ebbbce
CH
1368
1369static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1370{
1371 struct Scsi_Host *shost;
1372 struct sas_internal *i;
1373
1374 if (!scsi_is_sas_rphy(dev))
1375 return 0;
1376 shost = dev_to_shost(dev->parent->parent);
1377
1378 if (!shost->transportt)
1379 return 0;
1380 if (shost->transportt->host_attrs.ac.class !=
1381 &sas_host_class.class)
1382 return 0;
1383
1384 i = to_sas_internal(shost->transportt);
1385 return &i->rphy_attr_cont.ac == cont;
1386}
1387
42ab0360
JB
1388static int sas_end_dev_match(struct attribute_container *cont,
1389 struct device *dev)
1390{
1391 struct Scsi_Host *shost;
1392 struct sas_internal *i;
1393 struct sas_rphy *rphy;
1394
1395 if (!scsi_is_sas_rphy(dev))
1396 return 0;
1397 shost = dev_to_shost(dev->parent->parent);
1398 rphy = dev_to_rphy(dev);
1399
1400 if (!shost->transportt)
1401 return 0;
1402 if (shost->transportt->host_attrs.ac.class !=
1403 &sas_host_class.class)
1404 return 0;
1405
1406 i = to_sas_internal(shost->transportt);
1407 return &i->end_dev_attr_cont.ac == cont &&
2f8600df 1408 rphy->identify.device_type == SAS_END_DEVICE;
42ab0360
JB
1409}
1410
79cb1819
JB
1411static int sas_expander_match(struct attribute_container *cont,
1412 struct device *dev)
1413{
1414 struct Scsi_Host *shost;
1415 struct sas_internal *i;
1416 struct sas_rphy *rphy;
1417
1418 if (!scsi_is_sas_rphy(dev))
1419 return 0;
1420 shost = dev_to_shost(dev->parent->parent);
1421 rphy = dev_to_rphy(dev);
1422
1423 if (!shost->transportt)
1424 return 0;
1425 if (shost->transportt->host_attrs.ac.class !=
1426 &sas_host_class.class)
1427 return 0;
1428
1429 i = to_sas_internal(shost->transportt);
1430 return &i->expander_attr_cont.ac == cont &&
1431 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
2f8600df 1432 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
79cb1819
JB
1433}
1434
2f8600df 1435static void sas_expander_release(struct device *dev)
c7ebbbce
CH
1436{
1437 struct sas_rphy *rphy = dev_to_rphy(dev);
2f8600df 1438 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
c7ebbbce 1439
93c20a59
FT
1440 if (rphy->q)
1441 blk_cleanup_queue(rphy->q);
1442
c7ebbbce 1443 put_device(dev->parent);
2f8600df 1444 kfree(edev);
c7ebbbce
CH
1445}
1446
2f8600df 1447static void sas_end_device_release(struct device *dev)
c7ebbbce 1448{
2f8600df
JB
1449 struct sas_rphy *rphy = dev_to_rphy(dev);
1450 struct sas_end_device *edev = rphy_to_end_device(rphy);
c7ebbbce 1451
93c20a59
FT
1452 if (rphy->q)
1453 blk_cleanup_queue(rphy->q);
1454
2f8600df
JB
1455 put_device(dev->parent);
1456 kfree(edev);
c7ebbbce 1457}
c7ebbbce 1458
c5943d36
JB
1459/**
1460 * sas_rphy_initialize - common rphy intialization
1461 * @rphy: rphy to initialise
1462 *
1463 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1464 * initialise the common rphy component of each.
1465 */
1466static void sas_rphy_initialize(struct sas_rphy *rphy)
1467{
1468 INIT_LIST_HEAD(&rphy->list);
1469}
1470
42ab0360
JB
1471/**
1472 * sas_end_device_alloc - allocate an rphy for an end device
eb44820c 1473 * @parent: which port
42ab0360
JB
1474 *
1475 * Allocates an SAS remote PHY structure, connected to @parent.
1476 *
1477 * Returns:
1478 * SAS PHY allocated or %NULL if the allocation failed.
1479 */
65c92b09 1480struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
42ab0360
JB
1481{
1482 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1483 struct sas_end_device *rdev;
1484
1485 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1486 if (!rdev) {
42ab0360
JB
1487 return NULL;
1488 }
1489
1490 device_initialize(&rdev->rphy.dev);
1491 rdev->rphy.dev.parent = get_device(&parent->dev);
2f8600df 1492 rdev->rphy.dev.release = sas_end_device_release;
65c92b09
JB
1493 if (scsi_is_sas_expander_device(parent->dev.parent)) {
1494 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
71610f55
KS
1495 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1496 shost->host_no, rphy->scsi_target_id,
1497 parent->port_identifier);
65c92b09 1498 } else
71610f55
KS
1499 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1500 shost->host_no, parent->port_identifier);
42ab0360 1501 rdev->rphy.identify.device_type = SAS_END_DEVICE;
c5943d36 1502 sas_rphy_initialize(&rdev->rphy);
42ab0360
JB
1503 transport_setup_device(&rdev->rphy.dev);
1504
1505 return &rdev->rphy;
1506}
1507EXPORT_SYMBOL(sas_end_device_alloc);
1508
79cb1819
JB
1509/**
1510 * sas_expander_alloc - allocate an rphy for an end device
eb44820c
RL
1511 * @parent: which port
1512 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
79cb1819
JB
1513 *
1514 * Allocates an SAS remote PHY structure, connected to @parent.
1515 *
1516 * Returns:
1517 * SAS PHY allocated or %NULL if the allocation failed.
1518 */
65c92b09 1519struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
79cb1819
JB
1520 enum sas_device_type type)
1521{
1522 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1523 struct sas_expander_device *rdev;
1524 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1525
1526 BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1527 type != SAS_FANOUT_EXPANDER_DEVICE);
1528
1529 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1530 if (!rdev) {
79cb1819
JB
1531 return NULL;
1532 }
1533
1534 device_initialize(&rdev->rphy.dev);
1535 rdev->rphy.dev.parent = get_device(&parent->dev);
2f8600df 1536 rdev->rphy.dev.release = sas_expander_release;
79cb1819
JB
1537 mutex_lock(&sas_host->lock);
1538 rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1539 mutex_unlock(&sas_host->lock);
71610f55
KS
1540 dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1541 shost->host_no, rdev->rphy.scsi_target_id);
79cb1819 1542 rdev->rphy.identify.device_type = type;
c5943d36 1543 sas_rphy_initialize(&rdev->rphy);
79cb1819
JB
1544 transport_setup_device(&rdev->rphy.dev);
1545
1546 return &rdev->rphy;
1547}
1548EXPORT_SYMBOL(sas_expander_alloc);
42ab0360 1549
c7ebbbce 1550/**
eb44820c 1551 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
c7ebbbce
CH
1552 * @rphy: The remote PHY to be added
1553 *
1554 * Publishes a SAS remote PHY to the rest of the system.
1555 */
1556int sas_rphy_add(struct sas_rphy *rphy)
1557{
65c92b09 1558 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
c7ebbbce
CH
1559 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1560 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1561 struct sas_identify *identify = &rphy->identify;
1562 int error;
1563
1564 if (parent->rphy)
1565 return -ENXIO;
1566 parent->rphy = rphy;
1567
1568 error = device_add(&rphy->dev);
1569 if (error)
1570 return error;
1571 transport_add_device(&rphy->dev);
1572 transport_configure_device(&rphy->dev);
39dca558 1573 if (sas_bsg_initialize(shost, rphy))
71610f55 1574 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
39dca558 1575
c7ebbbce 1576
e02f3f59 1577 mutex_lock(&sas_host->lock);
c7ebbbce
CH
1578 list_add_tail(&rphy->list, &sas_host->rphy_list);
1579 if (identify->device_type == SAS_END_DEVICE &&
1580 (identify->target_port_protocols &
1581 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1582 rphy->scsi_target_id = sas_host->next_target_id++;
7676f83a
JB
1583 else if (identify->device_type == SAS_END_DEVICE)
1584 rphy->scsi_target_id = -1;
e02f3f59 1585 mutex_unlock(&sas_host->lock);
c7ebbbce 1586
79cb1819
JB
1587 if (identify->device_type == SAS_END_DEVICE &&
1588 rphy->scsi_target_id != -1) {
2fc62e2a
DW
1589 int lun;
1590
1591 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1592 lun = SCAN_WILD_CARD;
1593 else
1594 lun = 0;
1595
1596 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
c7ebbbce
CH
1597 }
1598
1599 return 0;
1600}
1601EXPORT_SYMBOL(sas_rphy_add);
1602
1603/**
eb44820c
RL
1604 * sas_rphy_free - free a SAS remote PHY
1605 * @rphy: SAS remote PHY to free
c7ebbbce
CH
1606 *
1607 * Frees the specified SAS remote PHY.
1608 *
1609 * Note:
1610 * This function must only be called on a remote
af901ca1 1611 * PHY that has not successfully been added using
6f63caae 1612 * sas_rphy_add() (or has been sas_rphy_remove()'d)
c7ebbbce
CH
1613 */
1614void sas_rphy_free(struct sas_rphy *rphy)
1615{
92aab646 1616 struct device *dev = &rphy->dev;
c7ebbbce
CH
1617 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1618 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1619
e02f3f59 1620 mutex_lock(&sas_host->lock);
c7ebbbce 1621 list_del(&rphy->list);
e02f3f59 1622 mutex_unlock(&sas_host->lock);
c7ebbbce 1623
b6aff669
JB
1624 sas_bsg_remove(shost, rphy);
1625
92aab646 1626 transport_destroy_device(dev);
2f8600df 1627
92aab646 1628 put_device(dev);
c7ebbbce
CH
1629}
1630EXPORT_SYMBOL(sas_rphy_free);
1631
1632/**
eb44820c 1633 * sas_rphy_delete - remove and free SAS remote PHY
6f63caae 1634 * @rphy: SAS remote PHY to remove and free
c7ebbbce 1635 *
6f63caae 1636 * Removes the specified SAS remote PHY and frees it.
c7ebbbce
CH
1637 */
1638void
1639sas_rphy_delete(struct sas_rphy *rphy)
6f63caae
DW
1640{
1641 sas_rphy_remove(rphy);
1642 sas_rphy_free(rphy);
1643}
1644EXPORT_SYMBOL(sas_rphy_delete);
1645
87c8331f
DW
1646/**
1647 * sas_rphy_unlink - unlink SAS remote PHY
1648 * @rphy: SAS remote phy to unlink from its parent port
1649 *
1650 * Removes port reference to an rphy
1651 */
1652void sas_rphy_unlink(struct sas_rphy *rphy)
1653{
1654 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1655
1656 parent->rphy = NULL;
1657}
1658EXPORT_SYMBOL(sas_rphy_unlink);
1659
6f63caae 1660/**
eb44820c 1661 * sas_rphy_remove - remove SAS remote PHY
6f63caae
DW
1662 * @rphy: SAS remote phy to remove
1663 *
1664 * Removes the specified SAS remote PHY.
1665 */
1666void
1667sas_rphy_remove(struct sas_rphy *rphy)
c7ebbbce
CH
1668{
1669 struct device *dev = &rphy->dev;
c7ebbbce 1670
d4054239
CH
1671 switch (rphy->identify.device_type) {
1672 case SAS_END_DEVICE:
1673 scsi_remove_target(dev);
1674 break;
1675 case SAS_EDGE_EXPANDER_DEVICE:
1676 case SAS_FANOUT_EXPANDER_DEVICE:
65c92b09 1677 sas_remove_children(dev);
d4054239
CH
1678 break;
1679 default:
1680 break;
1681 }
c7ebbbce 1682
87c8331f 1683 sas_rphy_unlink(rphy);
fe8b2304
CH
1684 transport_remove_device(dev);
1685 device_del(dev);
c7ebbbce 1686}
6f63caae 1687EXPORT_SYMBOL(sas_rphy_remove);
c7ebbbce
CH
1688
1689/**
eb44820c 1690 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
c7ebbbce
CH
1691 * @dev: device to check
1692 *
1693 * Returns:
1694 * %1 if the device represents a SAS remote PHY, %0 else
1695 */
1696int scsi_is_sas_rphy(const struct device *dev)
1697{
2f8600df
JB
1698 return dev->release == sas_end_device_release ||
1699 dev->release == sas_expander_release;
c7ebbbce
CH
1700}
1701EXPORT_SYMBOL(scsi_is_sas_rphy);
1702
1703
1704/*
1705 * SCSI scan helper
1706 */
1707
e02f3f59
CH
1708static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1709 uint id, uint lun)
c7ebbbce
CH
1710{
1711 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1712 struct sas_rphy *rphy;
c7ebbbce 1713
e02f3f59 1714 mutex_lock(&sas_host->lock);
c7ebbbce 1715 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
6d99a3f3
JB
1716 if (rphy->identify.device_type != SAS_END_DEVICE ||
1717 rphy->scsi_target_id == -1)
e02f3f59
CH
1718 continue;
1719
e8bf3941 1720 if ((channel == SCAN_WILD_CARD || channel == 0) &&
e02f3f59 1721 (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
e8bf3941 1722 scsi_scan_target(&rphy->dev, 0,
e02f3f59
CH
1723 rphy->scsi_target_id, lun, 1);
1724 }
c7ebbbce 1725 }
e02f3f59 1726 mutex_unlock(&sas_host->lock);
c7ebbbce 1727
e02f3f59 1728 return 0;
c7ebbbce
CH
1729}
1730
1731
1732/*
1733 * Setup / Teardown code
1734 */
1735
d24e1eeb 1736#define SETUP_TEMPLATE(attrb, field, perm, test) \
ee959b00 1737 i->private_##attrb[count] = dev_attr_##field; \
42ab0360 1738 i->private_##attrb[count].attr.mode = perm; \
42ab0360
JB
1739 i->attrb[count] = &i->private_##attrb[count]; \
1740 if (test) \
1741 count++
1742
d24e1eeb 1743#define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
ee959b00 1744 i->private_##attrb[count] = dev_attr_##field; \
d24e1eeb
JB
1745 i->private_##attrb[count].attr.mode = perm; \
1746 if (ro_test) { \
1747 i->private_##attrb[count].attr.mode = ro_perm; \
1748 i->private_##attrb[count].store = NULL; \
1749 } \
1750 i->attrb[count] = &i->private_##attrb[count]; \
1751 if (test) \
1752 count++
42ab0360
JB
1753
1754#define SETUP_RPORT_ATTRIBUTE(field) \
1755 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
c7ebbbce 1756
dd9fbb52 1757#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
42ab0360 1758 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
dd9fbb52 1759
65c92b09 1760#define SETUP_PHY_ATTRIBUTE(field) \
42ab0360 1761 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
c7ebbbce 1762
d24e1eeb
JB
1763#define SETUP_PHY_ATTRIBUTE_RW(field) \
1764 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1765 !i->f->set_phy_speed, S_IRUGO)
1766
acbf167d
DW
1767#define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1768 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1769 !i->f->func, S_IRUGO)
1770
65c92b09
JB
1771#define SETUP_PORT_ATTRIBUTE(field) \
1772 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1773
1774#define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
42ab0360 1775 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
dd9fbb52 1776
65c92b09 1777#define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
fe3b5bfe 1778 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
07ba3a95 1779
65c92b09 1780#define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
fe3b5bfe 1781 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
dd9fbb52 1782
42ab0360
JB
1783#define SETUP_END_DEV_ATTRIBUTE(field) \
1784 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
c7ebbbce 1785
79cb1819
JB
1786#define SETUP_EXPANDER_ATTRIBUTE(field) \
1787 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1788
c7ebbbce 1789/**
eb44820c 1790 * sas_attach_transport - instantiate SAS transport template
c7ebbbce
CH
1791 * @ft: SAS transport class function template
1792 */
1793struct scsi_transport_template *
1794sas_attach_transport(struct sas_function_template *ft)
1795{
1796 struct sas_internal *i;
1797 int count;
1798
24669f75 1799 i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
c7ebbbce
CH
1800 if (!i)
1801 return NULL;
c7ebbbce 1802
e02f3f59 1803 i->t.user_scan = sas_user_scan;
c7ebbbce
CH
1804
1805 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1806 i->t.host_attrs.ac.class = &sas_host_class.class;
1807 i->t.host_attrs.ac.match = sas_host_match;
1808 transport_container_register(&i->t.host_attrs);
1809 i->t.host_size = sizeof(struct sas_host_attrs);
1810
1811 i->phy_attr_cont.ac.class = &sas_phy_class.class;
1812 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1813 i->phy_attr_cont.ac.match = sas_phy_match;
1814 transport_container_register(&i->phy_attr_cont);
1815
65c92b09
JB
1816 i->port_attr_cont.ac.class = &sas_port_class.class;
1817 i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1818 i->port_attr_cont.ac.match = sas_port_match;
1819 transport_container_register(&i->port_attr_cont);
1820
c7ebbbce
CH
1821 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1822 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1823 i->rphy_attr_cont.ac.match = sas_rphy_match;
1824 transport_container_register(&i->rphy_attr_cont);
1825
42ab0360
JB
1826 i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1827 i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1828 i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1829 transport_container_register(&i->end_dev_attr_cont);
1830
79cb1819
JB
1831 i->expander_attr_cont.ac.class = &sas_expander_class.class;
1832 i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1833 i->expander_attr_cont.ac.match = sas_expander_match;
1834 transport_container_register(&i->expander_attr_cont);
1835
c7ebbbce
CH
1836 i->f = ft;
1837
c7ebbbce 1838 count = 0;
65c92b09
JB
1839 SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1840 SETUP_PHY_ATTRIBUTE(target_port_protocols);
1841 SETUP_PHY_ATTRIBUTE(device_type);
1842 SETUP_PHY_ATTRIBUTE(sas_address);
1843 SETUP_PHY_ATTRIBUTE(phy_identifier);
1844 //SETUP_PHY_ATTRIBUTE(port_identifier);
1845 SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1846 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
d24e1eeb 1847 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
65c92b09 1848 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
d24e1eeb 1849 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
65c92b09
JB
1850
1851 SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1852 SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1853 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1854 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1855 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1856 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
acbf167d 1857 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
c7ebbbce
CH
1858 i->phy_attrs[count] = NULL;
1859
65c92b09
JB
1860 count = 0;
1861 SETUP_PORT_ATTRIBUTE(num_phys);
1862 i->port_attrs[count] = NULL;
1863
c7ebbbce
CH
1864 count = 0;
1865 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1866 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1867 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1868 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1869 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
dd9fbb52
JB
1870 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1871 get_enclosure_identifier);
1872 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1873 get_bay_identifier);
c7ebbbce
CH
1874 i->rphy_attrs[count] = NULL;
1875
42ab0360
JB
1876 count = 0;
1877 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1878 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1879 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
0f88009d
JB
1880 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1881 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
42ab0360
JB
1882 i->end_dev_attrs[count] = NULL;
1883
79cb1819
JB
1884 count = 0;
1885 SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1886 SETUP_EXPANDER_ATTRIBUTE(product_id);
1887 SETUP_EXPANDER_ATTRIBUTE(product_rev);
1888 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1889 SETUP_EXPANDER_ATTRIBUTE(component_id);
1890 SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1891 SETUP_EXPANDER_ATTRIBUTE(level);
1892 i->expander_attrs[count] = NULL;
1893
c7ebbbce
CH
1894 return &i->t;
1895}
1896EXPORT_SYMBOL(sas_attach_transport);
1897
1898/**
eb44820c 1899 * sas_release_transport - release SAS transport template instance
c7ebbbce
CH
1900 * @t: transport template instance
1901 */
1902void sas_release_transport(struct scsi_transport_template *t)
1903{
1904 struct sas_internal *i = to_sas_internal(t);
1905
1906 transport_container_unregister(&i->t.host_attrs);
1907 transport_container_unregister(&i->phy_attr_cont);
65c92b09 1908 transport_container_unregister(&i->port_attr_cont);
c7ebbbce 1909 transport_container_unregister(&i->rphy_attr_cont);
db82f841 1910 transport_container_unregister(&i->end_dev_attr_cont);
79cb1819 1911 transport_container_unregister(&i->expander_attr_cont);
c7ebbbce
CH
1912
1913 kfree(i);
1914}
1915EXPORT_SYMBOL(sas_release_transport);
1916
1917static __init int sas_transport_init(void)
1918{
1919 int error;
1920
1921 error = transport_class_register(&sas_host_class);
1922 if (error)
1923 goto out;
1924 error = transport_class_register(&sas_phy_class);
1925 if (error)
1926 goto out_unregister_transport;
65c92b09 1927 error = transport_class_register(&sas_port_class);
c7ebbbce
CH
1928 if (error)
1929 goto out_unregister_phy;
65c92b09
JB
1930 error = transport_class_register(&sas_rphy_class);
1931 if (error)
1932 goto out_unregister_port;
42ab0360
JB
1933 error = transport_class_register(&sas_end_dev_class);
1934 if (error)
1935 goto out_unregister_rphy;
79cb1819
JB
1936 error = transport_class_register(&sas_expander_class);
1937 if (error)
1938 goto out_unregister_end_dev;
c7ebbbce
CH
1939
1940 return 0;
1941
79cb1819
JB
1942 out_unregister_end_dev:
1943 transport_class_unregister(&sas_end_dev_class);
42ab0360
JB
1944 out_unregister_rphy:
1945 transport_class_unregister(&sas_rphy_class);
65c92b09
JB
1946 out_unregister_port:
1947 transport_class_unregister(&sas_port_class);
c7ebbbce
CH
1948 out_unregister_phy:
1949 transport_class_unregister(&sas_phy_class);
1950 out_unregister_transport:
1951 transport_class_unregister(&sas_host_class);
1952 out:
1953 return error;
1954
1955}
1956
1957static void __exit sas_transport_exit(void)
1958{
1959 transport_class_unregister(&sas_host_class);
1960 transport_class_unregister(&sas_phy_class);
65c92b09 1961 transport_class_unregister(&sas_port_class);
c7ebbbce 1962 transport_class_unregister(&sas_rphy_class);
42ab0360 1963 transport_class_unregister(&sas_end_dev_class);
79cb1819 1964 transport_class_unregister(&sas_expander_class);
c7ebbbce
CH
1965}
1966
1967MODULE_AUTHOR("Christoph Hellwig");
86b9c4c1 1968MODULE_DESCRIPTION("SAS Transport Attributes");
c7ebbbce
CH
1969MODULE_LICENSE("GPL");
1970
1971module_init(sas_transport_init);
1972module_exit(sas_transport_exit);