blob: edabbd05d258882050661058b8bb32da15e69672 [file] [log] [blame]
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +02001/*
2 * Copyright (C) 2005 Dell Inc.
3 * Released under GPL v2.
4 *
5 * Serial Attached SCSI (SAS) transport class.
6 *
7 * The SAS transport class contains common code to deal with SAS HBAs,
8 * an aproximated representation of SAS topologies in the driver model,
9 * and various sysfs attributes to expose these topologies and managment
10 * interfaces to userspace.
11 *
12 * In addition to the basic SCSI core objects this transport class
13 * introduces two additional intermediate objects: The SAS PHY
14 * as represented by struct sas_phy defines an "outgoing" PHY on
15 * a SAS HBA or Expander, and the SAS remote PHY represented by
16 * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
17 * end device. Note that this is purely a software concept, the
18 * underlying hardware for a PHY and a remote PHY is the exactly
19 * the same.
20 *
21 * There is no concept of a SAS port in this code, users can see
22 * what PHYs form a wide port based on the port_identifier attribute,
23 * which is the same for all PHYs in a port.
24 */
25
26#include <linux/init.h>
27#include <linux/module.h>
28#include <linux/err.h>
Tim Schmielau8c65b4a2005-11-07 00:59:43 -080029#include <linux/slab.h>
30#include <linux/string.h>
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +020031
32#include <scsi/scsi_device.h>
33#include <scsi/scsi_host.h>
34#include <scsi/scsi_transport.h>
35#include <scsi/scsi_transport_sas.h>
36
37
38#define SAS_HOST_ATTRS 0
Christoph Hellwig07ba3a92005-10-19 20:01:31 +020039#define SAS_PORT_ATTRS 17
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +020040#define SAS_RPORT_ATTRS 5
41
42struct sas_internal {
43 struct scsi_transport_template t;
44 struct sas_function_template *f;
45
46 struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];
47 struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];
48 struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];
49
50 struct transport_container phy_attr_cont;
51 struct transport_container rphy_attr_cont;
52
53 /*
54 * The array of null terminated pointers to attributes
55 * needed by scsi_sysfs.c
56 */
57 struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];
58 struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];
59 struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];
60};
61#define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
62
63struct sas_host_attrs {
64 struct list_head rphy_list;
65 spinlock_t lock;
66 u32 next_target_id;
67};
68#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
69
70
71/*
72 * Hack to allow attributes of the same name in different objects.
73 */
74#define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
75 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
76 __ATTR(_name,_mode,_show,_store)
77
78
79/*
80 * Pretty printing helpers
81 */
82
83#define sas_bitfield_name_match(title, table) \
84static ssize_t \
85get_sas_##title##_names(u32 table_key, char *buf) \
86{ \
87 char *prefix = ""; \
88 ssize_t len = 0; \
89 int i; \
90 \
91 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
92 if (table[i].value & table_key) { \
93 len += sprintf(buf + len, "%s%s", \
94 prefix, table[i].name); \
95 prefix = ", "; \
96 } \
97 } \
98 len += sprintf(buf + len, "\n"); \
99 return len; \
100}
101
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 \
109 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
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" },
153};
154sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
155
156
157/*
158 * SAS host attributes
159 */
160
James Bottomley37be6ee2005-09-09 18:38:27 -0500161static int sas_host_setup(struct transport_container *tc, struct device *dev,
162 struct class_device *cdev)
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200163{
164 struct Scsi_Host *shost = dev_to_shost(dev);
165 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
166
167 INIT_LIST_HEAD(&sas_host->rphy_list);
168 spin_lock_init(&sas_host->lock);
169 sas_host->next_target_id = 0;
170 return 0;
171}
172
173static DECLARE_TRANSPORT_CLASS(sas_host_class,
174 "sas_host", sas_host_setup, NULL, NULL);
175
176static int sas_host_match(struct attribute_container *cont,
177 struct device *dev)
178{
179 struct Scsi_Host *shost;
180 struct sas_internal *i;
181
182 if (!scsi_is_host_device(dev))
183 return 0;
184 shost = dev_to_shost(dev);
185
186 if (!shost->transportt)
187 return 0;
188 if (shost->transportt->host_attrs.ac.class !=
189 &sas_host_class.class)
190 return 0;
191
192 i = to_sas_internal(shost->transportt);
193 return &i->t.host_attrs.ac == cont;
194}
195
196static int do_sas_phy_delete(struct device *dev, void *data)
197{
198 if (scsi_is_sas_phy(dev))
199 sas_phy_delete(dev_to_phy(dev));
200 return 0;
201}
202
203/**
204 * sas_remove_host -- tear down a Scsi_Host's SAS data structures
205 * @shost: Scsi Host that is torn down
206 *
207 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
208 * Must be called just before scsi_remove_host for SAS HBAs.
209 */
210void sas_remove_host(struct Scsi_Host *shost)
211{
212 device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
213}
214EXPORT_SYMBOL(sas_remove_host);
215
216
217/*
218 * SAS Port attributes
219 */
220
221#define sas_phy_show_simple(field, name, format_string, cast) \
222static ssize_t \
223show_sas_phy_##name(struct class_device *cdev, char *buf) \
224{ \
225 struct sas_phy *phy = transport_class_to_phy(cdev); \
226 \
227 return snprintf(buf, 20, format_string, cast phy->field); \
228}
229
230#define sas_phy_simple_attr(field, name, format_string, type) \
231 sas_phy_show_simple(field, name, format_string, (type)) \
232static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
233
234#define sas_phy_show_protocol(field, name) \
235static ssize_t \
236show_sas_phy_##name(struct class_device *cdev, char *buf) \
237{ \
238 struct sas_phy *phy = transport_class_to_phy(cdev); \
239 \
240 if (!phy->field) \
241 return snprintf(buf, 20, "none\n"); \
242 return get_sas_protocol_names(phy->field, buf); \
243}
244
245#define sas_phy_protocol_attr(field, name) \
246 sas_phy_show_protocol(field, name) \
247static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
248
249#define sas_phy_show_linkspeed(field) \
250static ssize_t \
251show_sas_phy_##field(struct class_device *cdev, char *buf) \
252{ \
253 struct sas_phy *phy = transport_class_to_phy(cdev); \
254 \
255 return get_sas_linkspeed_names(phy->field, buf); \
256}
257
258#define sas_phy_linkspeed_attr(field) \
259 sas_phy_show_linkspeed(field) \
260static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
261
Christoph Hellwigc3ee74c2005-09-19 21:59:42 +0200262#define sas_phy_show_linkerror(field) \
263static ssize_t \
264show_sas_phy_##field(struct class_device *cdev, char *buf) \
265{ \
266 struct sas_phy *phy = transport_class_to_phy(cdev); \
267 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
268 struct sas_internal *i = to_sas_internal(shost->transportt); \
269 int error; \
270 \
Christoph Hellwigac01bbb2005-10-19 20:01:17 +0200271 if (!phy->local_attached) \
272 return -EINVAL; \
273 \
Christoph Hellwigc3ee74c2005-09-19 21:59:42 +0200274 error = i->f->get_linkerrors(phy); \
275 if (error) \
276 return error; \
277 return snprintf(buf, 20, "%u\n", phy->field); \
278}
279
280#define sas_phy_linkerror_attr(field) \
281 sas_phy_show_linkerror(field) \
282static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
283
284
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200285static ssize_t
286show_sas_device_type(struct class_device *cdev, char *buf)
287{
288 struct sas_phy *phy = transport_class_to_phy(cdev);
289
290 if (!phy->identify.device_type)
291 return snprintf(buf, 20, "none\n");
292 return get_sas_device_type_names(phy->identify.device_type, buf);
293}
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200294static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
295
Christoph Hellwig07ba3a92005-10-19 20:01:31 +0200296static ssize_t do_sas_phy_reset(struct class_device *cdev,
297 size_t count, int hard_reset)
298{
299 struct sas_phy *phy = transport_class_to_phy(cdev);
300 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
301 struct sas_internal *i = to_sas_internal(shost->transportt);
302 int error;
303
304 if (!phy->local_attached)
305 return -EINVAL;
306
307 error = i->f->phy_reset(phy, hard_reset);
308 if (error)
309 return error;
310 return count;
311};
312
313static ssize_t store_sas_link_reset(struct class_device *cdev,
314 const char *buf, size_t count)
315{
316 return do_sas_phy_reset(cdev, count, 0);
317}
318static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
319
320static ssize_t store_sas_hard_reset(struct class_device *cdev,
321 const char *buf, size_t count)
322{
323 return do_sas_phy_reset(cdev, count, 1);
324}
325static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
326
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200327sas_phy_protocol_attr(identify.initiator_port_protocols,
328 initiator_port_protocols);
329sas_phy_protocol_attr(identify.target_port_protocols,
330 target_port_protocols);
331sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
332 unsigned long long);
333sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
334sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
335sas_phy_linkspeed_attr(negotiated_linkrate);
336sas_phy_linkspeed_attr(minimum_linkrate_hw);
337sas_phy_linkspeed_attr(minimum_linkrate);
338sas_phy_linkspeed_attr(maximum_linkrate_hw);
339sas_phy_linkspeed_attr(maximum_linkrate);
Christoph Hellwigc3ee74c2005-09-19 21:59:42 +0200340sas_phy_linkerror_attr(invalid_dword_count);
341sas_phy_linkerror_attr(running_disparity_error_count);
342sas_phy_linkerror_attr(loss_of_dword_sync_count);
343sas_phy_linkerror_attr(phy_reset_problem_count);
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200344
345
346static DECLARE_TRANSPORT_CLASS(sas_phy_class,
347 "sas_phy", NULL, NULL, NULL);
348
349static int sas_phy_match(struct attribute_container *cont, struct device *dev)
350{
351 struct Scsi_Host *shost;
352 struct sas_internal *i;
353
354 if (!scsi_is_sas_phy(dev))
355 return 0;
356 shost = dev_to_shost(dev->parent);
357
358 if (!shost->transportt)
359 return 0;
360 if (shost->transportt->host_attrs.ac.class !=
361 &sas_host_class.class)
362 return 0;
363
364 i = to_sas_internal(shost->transportt);
365 return &i->phy_attr_cont.ac == cont;
366}
367
368static void sas_phy_release(struct device *dev)
369{
370 struct sas_phy *phy = dev_to_phy(dev);
371
372 put_device(dev->parent);
373 kfree(phy);
374}
375
376/**
377 * sas_phy_alloc -- allocates and initialize a SAS PHY structure
378 * @parent: Parent device
379 * @number: Port number
380 *
381 * Allocates an SAS PHY structure. It will be added in the device tree
382 * below the device specified by @parent, which has to be either a Scsi_Host
383 * or sas_rphy.
384 *
385 * Returns:
386 * SAS PHY allocated or %NULL if the allocation failed.
387 */
388struct sas_phy *sas_phy_alloc(struct device *parent, int number)
389{
390 struct Scsi_Host *shost = dev_to_shost(parent);
391 struct sas_phy *phy;
392
393 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
394 if (!phy)
395 return NULL;
396 memset(phy, 0, sizeof(*phy));
397
398 get_device(parent);
399
400 phy->number = number;
401
402 device_initialize(&phy->dev);
403 phy->dev.parent = get_device(parent);
404 phy->dev.release = sas_phy_release;
405 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
406
407 transport_setup_device(&phy->dev);
408
409 return phy;
410}
411EXPORT_SYMBOL(sas_phy_alloc);
412
413/**
414 * sas_phy_add -- add a SAS PHY to the device hierachy
415 * @phy: The PHY to be added
416 *
417 * Publishes a SAS PHY to the rest of the system.
418 */
419int sas_phy_add(struct sas_phy *phy)
420{
421 int error;
422
423 error = device_add(&phy->dev);
424 if (!error) {
425 transport_add_device(&phy->dev);
426 transport_configure_device(&phy->dev);
427 }
428
429 return error;
430}
431EXPORT_SYMBOL(sas_phy_add);
432
433/**
434 * sas_phy_free -- free a SAS PHY
435 * @phy: SAS PHY to free
436 *
437 * Frees the specified SAS PHY.
438 *
439 * Note:
440 * This function must only be called on a PHY that has not
441 * sucessfully been added using sas_phy_add().
442 */
443void sas_phy_free(struct sas_phy *phy)
444{
445 transport_destroy_device(&phy->dev);
446 put_device(phy->dev.parent);
447 put_device(phy->dev.parent);
448 put_device(phy->dev.parent);
449 kfree(phy);
450}
451EXPORT_SYMBOL(sas_phy_free);
452
453/**
454 * sas_phy_delete -- remove SAS PHY
455 * @phy: SAS PHY to remove
456 *
457 * Removes the specified SAS PHY. If the SAS PHY has an
458 * associated remote PHY it is removed before.
459 */
460void
461sas_phy_delete(struct sas_phy *phy)
462{
463 struct device *dev = &phy->dev;
464
465 if (phy->rphy)
466 sas_rphy_delete(phy->rphy);
467
468 transport_remove_device(dev);
469 device_del(dev);
470 transport_destroy_device(dev);
471 put_device(dev->parent);
472}
473EXPORT_SYMBOL(sas_phy_delete);
474
475/**
476 * scsi_is_sas_phy -- check if a struct device represents a SAS PHY
477 * @dev: device to check
478 *
479 * Returns:
480 * %1 if the device represents a SAS PHY, %0 else
481 */
482int scsi_is_sas_phy(const struct device *dev)
483{
484 return dev->release == sas_phy_release;
485}
486EXPORT_SYMBOL(scsi_is_sas_phy);
487
488/*
489 * SAS remote PHY attributes.
490 */
491
492#define sas_rphy_show_simple(field, name, format_string, cast) \
493static ssize_t \
494show_sas_rphy_##name(struct class_device *cdev, char *buf) \
495{ \
496 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
497 \
498 return snprintf(buf, 20, format_string, cast rphy->field); \
499}
500
501#define sas_rphy_simple_attr(field, name, format_string, type) \
502 sas_rphy_show_simple(field, name, format_string, (type)) \
503static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
504 show_sas_rphy_##name, NULL)
505
506#define sas_rphy_show_protocol(field, name) \
507static ssize_t \
508show_sas_rphy_##name(struct class_device *cdev, char *buf) \
509{ \
510 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
511 \
512 if (!rphy->field) \
513 return snprintf(buf, 20, "none\n"); \
514 return get_sas_protocol_names(rphy->field, buf); \
515}
516
517#define sas_rphy_protocol_attr(field, name) \
518 sas_rphy_show_protocol(field, name) \
519static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
520 show_sas_rphy_##name, NULL)
521
522static ssize_t
523show_sas_rphy_device_type(struct class_device *cdev, char *buf)
524{
525 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
526
527 if (!rphy->identify.device_type)
528 return snprintf(buf, 20, "none\n");
529 return get_sas_device_type_names(
530 rphy->identify.device_type, buf);
531}
532
533static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
534 show_sas_rphy_device_type, NULL);
535
536sas_rphy_protocol_attr(identify.initiator_port_protocols,
537 initiator_port_protocols);
538sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
539sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
540 unsigned long long);
541sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
542
543static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
544 "sas_rphy", NULL, NULL, NULL);
545
546static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
547{
548 struct Scsi_Host *shost;
549 struct sas_internal *i;
550
551 if (!scsi_is_sas_rphy(dev))
552 return 0;
553 shost = dev_to_shost(dev->parent->parent);
554
555 if (!shost->transportt)
556 return 0;
557 if (shost->transportt->host_attrs.ac.class !=
558 &sas_host_class.class)
559 return 0;
560
561 i = to_sas_internal(shost->transportt);
562 return &i->rphy_attr_cont.ac == cont;
563}
564
565static void sas_rphy_release(struct device *dev)
566{
567 struct sas_rphy *rphy = dev_to_rphy(dev);
568
569 put_device(dev->parent);
570 kfree(rphy);
571}
572
573/**
574 * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure
575 * @parent: SAS PHY this remote PHY is conneted to
576 *
577 * Allocates an SAS remote PHY structure, connected to @parent.
578 *
579 * Returns:
580 * SAS PHY allocated or %NULL if the allocation failed.
581 */
582struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent)
583{
584 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
585 struct sas_rphy *rphy;
586
587 rphy = kmalloc(sizeof(*rphy), GFP_KERNEL);
588 if (!rphy) {
589 put_device(&parent->dev);
590 return NULL;
591 }
592 memset(rphy, 0, sizeof(*rphy));
593
594 device_initialize(&rphy->dev);
595 rphy->dev.parent = get_device(&parent->dev);
596 rphy->dev.release = sas_rphy_release;
597 sprintf(rphy->dev.bus_id, "rphy-%d:%d",
598 shost->host_no, parent->number);
599 transport_setup_device(&rphy->dev);
600
601 return rphy;
602}
603EXPORT_SYMBOL(sas_rphy_alloc);
604
605/**
606 * sas_rphy_add -- add a SAS remote PHY to the device hierachy
607 * @rphy: The remote PHY to be added
608 *
609 * Publishes a SAS remote PHY to the rest of the system.
610 */
611int sas_rphy_add(struct sas_rphy *rphy)
612{
613 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
614 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
615 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
616 struct sas_identify *identify = &rphy->identify;
617 int error;
618
619 if (parent->rphy)
620 return -ENXIO;
621 parent->rphy = rphy;
622
623 error = device_add(&rphy->dev);
624 if (error)
625 return error;
626 transport_add_device(&rphy->dev);
627 transport_configure_device(&rphy->dev);
628
629 spin_lock(&sas_host->lock);
630 list_add_tail(&rphy->list, &sas_host->rphy_list);
631 if (identify->device_type == SAS_END_DEVICE &&
632 (identify->target_port_protocols &
633 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
634 rphy->scsi_target_id = sas_host->next_target_id++;
635 else
636 rphy->scsi_target_id = -1;
637 spin_unlock(&sas_host->lock);
638
639 if (rphy->scsi_target_id != -1) {
640 scsi_scan_target(&rphy->dev, parent->number,
641 rphy->scsi_target_id, ~0, 0);
642 }
643
644 return 0;
645}
646EXPORT_SYMBOL(sas_rphy_add);
647
648/**
649 * sas_rphy_free -- free a SAS remote PHY
650 * @rphy SAS remote PHY to free
651 *
652 * Frees the specified SAS remote PHY.
653 *
654 * Note:
655 * This function must only be called on a remote
656 * PHY that has not sucessfully been added using
657 * sas_rphy_add().
658 */
659void sas_rphy_free(struct sas_rphy *rphy)
660{
661 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
662 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
663
664 spin_lock(&sas_host->lock);
665 list_del(&rphy->list);
666 spin_unlock(&sas_host->lock);
667
668 transport_destroy_device(&rphy->dev);
669 put_device(rphy->dev.parent);
670 put_device(rphy->dev.parent);
671 put_device(rphy->dev.parent);
672 kfree(rphy);
673}
674EXPORT_SYMBOL(sas_rphy_free);
675
676/**
677 * sas_rphy_delete -- remove SAS remote PHY
678 * @rphy: SAS remote PHY to remove
679 *
680 * Removes the specified SAS remote PHY.
681 */
682void
683sas_rphy_delete(struct sas_rphy *rphy)
684{
685 struct device *dev = &rphy->dev;
686 struct sas_phy *parent = dev_to_phy(dev->parent);
687 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
688 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
689
Christoph Hellwigfe8b2302005-09-25 23:10:33 +0200690 scsi_remove_target(dev);
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200691
Christoph Hellwigfe8b2302005-09-25 23:10:33 +0200692 transport_remove_device(dev);
693 device_del(dev);
694 transport_destroy_device(dev);
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200695
696 spin_lock(&sas_host->lock);
697 list_del(&rphy->list);
698 spin_unlock(&sas_host->lock);
699
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200700 put_device(&parent->dev);
701}
702EXPORT_SYMBOL(sas_rphy_delete);
703
704/**
705 * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
706 * @dev: device to check
707 *
708 * Returns:
709 * %1 if the device represents a SAS remote PHY, %0 else
710 */
711int scsi_is_sas_rphy(const struct device *dev)
712{
713 return dev->release == sas_rphy_release;
714}
715EXPORT_SYMBOL(scsi_is_sas_rphy);
716
717
718/*
719 * SCSI scan helper
720 */
721
722static struct device *sas_target_parent(struct Scsi_Host *shost,
723 int channel, uint id)
724{
725 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
726 struct sas_rphy *rphy;
727 struct device *dev = NULL;
728
729 spin_lock(&sas_host->lock);
730 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
731 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
732 if (parent->number == channel &&
733 rphy->scsi_target_id == id)
734 dev = &rphy->dev;
735 }
736 spin_unlock(&sas_host->lock);
737
738 return dev;
739}
740
741
742/*
743 * Setup / Teardown code
744 */
745
746#define SETUP_RPORT_ATTRIBUTE(field) \
747 i->private_rphy_attrs[count] = class_device_attr_##field; \
748 i->private_rphy_attrs[count].attr.mode = S_IRUGO; \
749 i->private_rphy_attrs[count].store = NULL; \
750 i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \
751 count++
752
753#define SETUP_PORT_ATTRIBUTE(field) \
754 i->private_phy_attrs[count] = class_device_attr_##field; \
755 i->private_phy_attrs[count].attr.mode = S_IRUGO; \
756 i->private_phy_attrs[count].store = NULL; \
757 i->phy_attrs[count] = &i->private_phy_attrs[count]; \
758 count++
759
Christoph Hellwig07ba3a92005-10-19 20:01:31 +0200760#define SETUP_PORT_ATTRIBUTE_WRONLY(field) \
761 i->private_phy_attrs[count] = class_device_attr_##field; \
762 i->private_phy_attrs[count].attr.mode = S_IWUGO; \
763 i->private_phy_attrs[count].show = NULL; \
764 i->phy_attrs[count] = &i->private_phy_attrs[count]; \
765 count++
766
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200767
768/**
769 * sas_attach_transport -- instantiate SAS transport template
770 * @ft: SAS transport class function template
771 */
772struct scsi_transport_template *
773sas_attach_transport(struct sas_function_template *ft)
774{
775 struct sas_internal *i;
776 int count;
777
778 i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL);
779 if (!i)
780 return NULL;
781 memset(i, 0, sizeof(struct sas_internal));
782
783 i->t.target_parent = sas_target_parent;
784
785 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
786 i->t.host_attrs.ac.class = &sas_host_class.class;
787 i->t.host_attrs.ac.match = sas_host_match;
788 transport_container_register(&i->t.host_attrs);
789 i->t.host_size = sizeof(struct sas_host_attrs);
790
791 i->phy_attr_cont.ac.class = &sas_phy_class.class;
792 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
793 i->phy_attr_cont.ac.match = sas_phy_match;
794 transport_container_register(&i->phy_attr_cont);
795
796 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
797 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
798 i->rphy_attr_cont.ac.match = sas_rphy_match;
799 transport_container_register(&i->rphy_attr_cont);
800
801 i->f = ft;
802
803 count = 0;
804 i->host_attrs[count] = NULL;
805
806 count = 0;
807 SETUP_PORT_ATTRIBUTE(initiator_port_protocols);
808 SETUP_PORT_ATTRIBUTE(target_port_protocols);
809 SETUP_PORT_ATTRIBUTE(device_type);
810 SETUP_PORT_ATTRIBUTE(sas_address);
811 SETUP_PORT_ATTRIBUTE(phy_identifier);
812 SETUP_PORT_ATTRIBUTE(port_identifier);
813 SETUP_PORT_ATTRIBUTE(negotiated_linkrate);
814 SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw);
815 SETUP_PORT_ATTRIBUTE(minimum_linkrate);
816 SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);
817 SETUP_PORT_ATTRIBUTE(maximum_linkrate);
Christoph Hellwigc3ee74c2005-09-19 21:59:42 +0200818
819 SETUP_PORT_ATTRIBUTE(invalid_dword_count);
820 SETUP_PORT_ATTRIBUTE(running_disparity_error_count);
821 SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count);
822 SETUP_PORT_ATTRIBUTE(phy_reset_problem_count);
Christoph Hellwig07ba3a92005-10-19 20:01:31 +0200823 SETUP_PORT_ATTRIBUTE_WRONLY(link_reset);
824 SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset);
Christoph Hellwigc7ebbbc2005-09-09 16:22:50 +0200825 i->phy_attrs[count] = NULL;
826
827 count = 0;
828 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
829 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
830 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
831 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
832 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
833 i->rphy_attrs[count] = NULL;
834
835 return &i->t;
836}
837EXPORT_SYMBOL(sas_attach_transport);
838
839/**
840 * sas_release_transport -- release SAS transport template instance
841 * @t: transport template instance
842 */
843void sas_release_transport(struct scsi_transport_template *t)
844{
845 struct sas_internal *i = to_sas_internal(t);
846
847 transport_container_unregister(&i->t.host_attrs);
848 transport_container_unregister(&i->phy_attr_cont);
849 transport_container_unregister(&i->rphy_attr_cont);
850
851 kfree(i);
852}
853EXPORT_SYMBOL(sas_release_transport);
854
855static __init int sas_transport_init(void)
856{
857 int error;
858
859 error = transport_class_register(&sas_host_class);
860 if (error)
861 goto out;
862 error = transport_class_register(&sas_phy_class);
863 if (error)
864 goto out_unregister_transport;
865 error = transport_class_register(&sas_rphy_class);
866 if (error)
867 goto out_unregister_phy;
868
869 return 0;
870
871 out_unregister_phy:
872 transport_class_unregister(&sas_phy_class);
873 out_unregister_transport:
874 transport_class_unregister(&sas_host_class);
875 out:
876 return error;
877
878}
879
880static void __exit sas_transport_exit(void)
881{
882 transport_class_unregister(&sas_host_class);
883 transport_class_unregister(&sas_phy_class);
884 transport_class_unregister(&sas_rphy_class);
885}
886
887MODULE_AUTHOR("Christoph Hellwig");
888MODULE_DESCRIPTION("SAS Transphy Attributes");
889MODULE_LICENSE("GPL");
890
891module_init(sas_transport_init);
892module_exit(sas_transport_exit);