2 * Copyright (C) 2005-2006 Dell Inc.
3 * Released under GPL v2.
5 * Serial Attached SCSI (SAS) transport class.
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.
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
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.
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>
35 #include <scsi/scsi.h>
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>
41 #include "scsi_sas_internal.h"
42 struct sas_host_attrs
{
43 struct list_head rphy_list
;
45 struct request_queue
*q
;
50 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
54 * Hack to allow attributes of the same name in different objects.
56 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
57 struct device_attribute dev_attr_##_prefix##_##_name = \
58 __ATTR(_name,_mode,_show,_store)
62 * Pretty printing helpers
65 #define sas_bitfield_name_match(title, table) \
67 get_sas_##title##_names(u32 table_key, char *buf) \
73 for (i = 0; i < ARRAY_SIZE(table); i++) { \
74 if (table[i].value & table_key) { \
75 len += sprintf(buf + len, "%s%s", \
76 prefix, table[i].name); \
80 len += sprintf(buf + len, "\n"); \
84 #define sas_bitfield_name_set(title, table) \
86 set_sas_##title##_names(u32 *table_key, const char *buf) \
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; \
102 #define sas_bitfield_name_search(title, table) \
104 get_sas_##title##_names(u32 table_key, char *buf) \
109 for (i = 0; i < ARRAY_SIZE(table); i++) { \
110 if (table[i].value == table_key) { \
111 len += sprintf(buf + len, "%s", \
116 len += sprintf(buf + len, "\n"); \
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" },
129 sas_bitfield_name_search(device_type
, sas_device_type_names
)
135 } sas_protocol_names
[] = {
136 { SAS_PROTOCOL_SATA
, "sata" },
137 { SAS_PROTOCOL_SMP
, "smp" },
138 { SAS_PROTOCOL_STP
, "stp" },
139 { SAS_PROTOCOL_SSP
, "ssp" },
141 sas_bitfield_name_match(protocol
, sas_protocol_names
)
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 { SAS_LINK_RATE_6_0_GBPS
, "6.0 Gbit" },
154 { SAS_LINK_RATE_12_0_GBPS
, "12.0 Gbit" },
156 sas_bitfield_name_search(linkspeed
, sas_linkspeed_names
)
157 sas_bitfield_name_set(linkspeed
, sas_linkspeed_names
)
159 static struct sas_end_device
*sas_sdev_to_rdev(struct scsi_device
*sdev
)
161 struct sas_rphy
*rphy
= target_to_rphy(sdev
->sdev_target
);
162 struct sas_end_device
*rdev
;
164 BUG_ON(rphy
->identify
.device_type
!= SAS_END_DEVICE
);
166 rdev
= rphy_to_end_device(rphy
);
170 static void sas_smp_request(struct request_queue
*q
, struct Scsi_Host
*shost
,
171 struct sas_rphy
*rphy
)
175 int (*handler
)(struct Scsi_Host
*, struct sas_rphy
*, struct request
*);
177 while ((req
= blk_fetch_request(q
)) != NULL
) {
178 spin_unlock_irq(q
->queue_lock
);
180 handler
= to_sas_internal(shost
->transportt
)->f
->smp_handler
;
181 ret
= handler(shost
, rphy
, req
);
184 blk_end_request_all(req
, ret
);
186 spin_lock_irq(q
->queue_lock
);
190 static void sas_host_smp_request(struct request_queue
*q
)
192 sas_smp_request(q
, (struct Scsi_Host
*)q
->queuedata
, NULL
);
195 static void sas_non_host_smp_request(struct request_queue
*q
)
197 struct sas_rphy
*rphy
= q
->queuedata
;
198 sas_smp_request(q
, rphy_to_shost(rphy
), rphy
);
201 static void sas_host_release(struct device
*dev
)
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
;
208 blk_cleanup_queue(q
);
211 static int sas_bsg_initialize(struct Scsi_Host
*shost
, struct sas_rphy
*rphy
)
213 struct request_queue
*q
;
218 void (*release
)(struct device
*);
220 if (!to_sas_internal(shost
->transportt
)->f
->smp_handler
) {
221 printk("%s can't handle SMP requests\n", shost
->hostt
->name
);
226 q
= blk_init_queue(sas_non_host_smp_request
, NULL
);
228 name
= dev_name(dev
);
231 q
= blk_init_queue(sas_host_smp_request
, NULL
);
232 dev
= &shost
->shost_gendev
;
233 snprintf(namebuf
, sizeof(namebuf
),
234 "sas_host%d", shost
->host_no
);
236 release
= sas_host_release
;
241 error
= bsg_register_queue(q
, dev
, name
, release
);
243 blk_cleanup_queue(q
);
250 to_sas_host_attrs(shost
)->q
= q
;
255 q
->queuedata
= shost
;
257 queue_flag_set_unlocked(QUEUE_FLAG_BIDI
, q
);
261 static void sas_bsg_remove(struct Scsi_Host
*shost
, struct sas_rphy
*rphy
)
263 struct request_queue
*q
;
268 q
= to_sas_host_attrs(shost
)->q
;
273 bsg_unregister_queue(q
);
277 * SAS host attributes
280 static int sas_host_setup(struct transport_container
*tc
, struct device
*dev
,
283 struct Scsi_Host
*shost
= dev_to_shost(dev
);
284 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
286 INIT_LIST_HEAD(&sas_host
->rphy_list
);
287 mutex_init(&sas_host
->lock
);
288 sas_host
->next_target_id
= 0;
289 sas_host
->next_expander_id
= 0;
290 sas_host
->next_port_id
= 0;
292 if (sas_bsg_initialize(shost
, NULL
))
293 dev_printk(KERN_ERR
, dev
, "fail to a bsg device %d\n",
299 static int sas_host_remove(struct transport_container
*tc
, struct device
*dev
,
302 struct Scsi_Host
*shost
= dev_to_shost(dev
);
304 sas_bsg_remove(shost
, NULL
);
309 static DECLARE_TRANSPORT_CLASS(sas_host_class
,
310 "sas_host", sas_host_setup
, sas_host_remove
, NULL
);
312 static int sas_host_match(struct attribute_container
*cont
,
315 struct Scsi_Host
*shost
;
316 struct sas_internal
*i
;
318 if (!scsi_is_host_device(dev
))
320 shost
= dev_to_shost(dev
);
322 if (!shost
->transportt
)
324 if (shost
->transportt
->host_attrs
.ac
.class !=
325 &sas_host_class
.class)
328 i
= to_sas_internal(shost
->transportt
);
329 return &i
->t
.host_attrs
.ac
== cont
;
332 static int do_sas_phy_delete(struct device
*dev
, void *data
)
334 int pass
= (int)(unsigned long)data
;
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
))
339 sas_phy_delete(dev_to_phy(dev
));
344 * sas_remove_children - tear down a devices SAS data structures
345 * @dev: device belonging to the sas object
347 * Removes all SAS PHYs and remote PHYs for a given object
349 void sas_remove_children(struct device
*dev
)
351 device_for_each_child(dev
, (void *)0, do_sas_phy_delete
);
352 device_for_each_child(dev
, (void *)1, do_sas_phy_delete
);
354 EXPORT_SYMBOL(sas_remove_children
);
357 * sas_remove_host - tear down a Scsi_Host's SAS data structures
358 * @shost: Scsi Host that is torn down
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.
363 void sas_remove_host(struct Scsi_Host
*shost
)
365 sas_remove_children(&shost
->shost_gendev
);
367 EXPORT_SYMBOL(sas_remove_host
);
370 * sas_tlr_supported - checking TLR bit in vpd 0x90
371 * @sdev: scsi device struct
373 * Check Transport Layer Retries are supported or not.
374 * If vpd page 0x90 is present, TRL is supported.
378 sas_tlr_supported(struct scsi_device
*sdev
)
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
);
385 if (scsi_get_vpd_page(sdev
, 0x90, buffer
, vpd_len
))
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
394 ret
= buffer
[12] & 0x01;
398 rdev
->tlr_supported
= ret
;
402 EXPORT_SYMBOL_GPL(sas_tlr_supported
);
405 * sas_disable_tlr - setting TLR flags
406 * @sdev: scsi device struct
408 * Seting tlr_enabled flag to 0.
412 sas_disable_tlr(struct scsi_device
*sdev
)
414 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
416 rdev
->tlr_enabled
= 0;
418 EXPORT_SYMBOL_GPL(sas_disable_tlr
);
421 * sas_enable_tlr - setting TLR flags
422 * @sdev: scsi device struct
424 * Seting tlr_enabled flag 1.
427 void sas_enable_tlr(struct scsi_device
*sdev
)
429 unsigned int tlr_supported
= 0;
430 tlr_supported
= sas_tlr_supported(sdev
);
433 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
435 rdev
->tlr_enabled
= 1;
440 EXPORT_SYMBOL_GPL(sas_enable_tlr
);
442 unsigned int sas_is_tlr_enabled(struct scsi_device
*sdev
)
444 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
445 return rdev
->tlr_enabled
;
447 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled
);
453 #define sas_phy_show_simple(field, name, format_string, cast) \
455 show_sas_phy_##name(struct device *dev, \
456 struct device_attribute *attr, char *buf) \
458 struct sas_phy *phy = transport_class_to_phy(dev); \
460 return snprintf(buf, 20, format_string, cast phy->field); \
463 #define sas_phy_simple_attr(field, name, format_string, type) \
464 sas_phy_show_simple(field, name, format_string, (type)) \
465 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
467 #define sas_phy_show_protocol(field, name) \
469 show_sas_phy_##name(struct device *dev, \
470 struct device_attribute *attr, char *buf) \
472 struct sas_phy *phy = transport_class_to_phy(dev); \
475 return snprintf(buf, 20, "none\n"); \
476 return get_sas_protocol_names(phy->field, buf); \
479 #define sas_phy_protocol_attr(field, name) \
480 sas_phy_show_protocol(field, name) \
481 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
483 #define sas_phy_show_linkspeed(field) \
485 show_sas_phy_##field(struct device *dev, \
486 struct device_attribute *attr, char *buf) \
488 struct sas_phy *phy = transport_class_to_phy(dev); \
490 return get_sas_linkspeed_names(phy->field, buf); \
493 /* Fudge to tell if we're minimum or maximum */
494 #define sas_phy_store_linkspeed(field) \
496 store_sas_phy_##field(struct device *dev, \
497 struct device_attribute *attr, \
498 const char *buf, size_t count) \
500 struct sas_phy *phy = transport_class_to_phy(dev); \
501 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
502 struct sas_internal *i = to_sas_internal(shost->transportt); \
504 struct sas_phy_linkrates rates = {0}; \
507 error = set_sas_linkspeed_names(&value, buf); \
510 rates.field = value; \
511 error = i->f->set_phy_speed(phy, &rates); \
513 return error ? error : count; \
516 #define sas_phy_linkspeed_rw_attr(field) \
517 sas_phy_show_linkspeed(field) \
518 sas_phy_store_linkspeed(field) \
519 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
520 store_sas_phy_##field)
522 #define sas_phy_linkspeed_attr(field) \
523 sas_phy_show_linkspeed(field) \
524 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
527 #define sas_phy_show_linkerror(field) \
529 show_sas_phy_##field(struct device *dev, \
530 struct device_attribute *attr, char *buf) \
532 struct sas_phy *phy = transport_class_to_phy(dev); \
533 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
534 struct sas_internal *i = to_sas_internal(shost->transportt); \
537 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
540 return snprintf(buf, 20, "%u\n", phy->field); \
543 #define sas_phy_linkerror_attr(field) \
544 sas_phy_show_linkerror(field) \
545 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
549 show_sas_device_type(struct device
*dev
,
550 struct device_attribute
*attr
, char *buf
)
552 struct sas_phy
*phy
= transport_class_to_phy(dev
);
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
);
558 static DEVICE_ATTR(device_type
, S_IRUGO
, show_sas_device_type
, NULL
);
560 static ssize_t
do_sas_phy_enable(struct device
*dev
,
561 size_t count
, int enable
)
563 struct sas_phy
*phy
= transport_class_to_phy(dev
);
564 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
565 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
568 error
= i
->f
->phy_enable(phy
, enable
);
571 phy
->enabled
= enable
;
576 store_sas_phy_enable(struct device
*dev
, struct device_attribute
*attr
,
577 const char *buf
, size_t count
)
584 do_sas_phy_enable(dev
, count
, 0);
587 do_sas_phy_enable(dev
, count
, 1);
597 show_sas_phy_enable(struct device
*dev
, struct device_attribute
*attr
,
600 struct sas_phy
*phy
= transport_class_to_phy(dev
);
602 return snprintf(buf
, 20, "%d", phy
->enabled
);
605 static DEVICE_ATTR(enable
, S_IRUGO
| S_IWUSR
, show_sas_phy_enable
,
606 store_sas_phy_enable
);
609 do_sas_phy_reset(struct device
*dev
, size_t count
, int hard_reset
)
611 struct sas_phy
*phy
= transport_class_to_phy(dev
);
612 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
613 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
616 error
= i
->f
->phy_reset(phy
, hard_reset
);
624 store_sas_link_reset(struct device
*dev
, struct device_attribute
*attr
,
625 const char *buf
, size_t count
)
627 return do_sas_phy_reset(dev
, count
, 0);
629 static DEVICE_ATTR(link_reset
, S_IWUSR
, NULL
, store_sas_link_reset
);
632 store_sas_hard_reset(struct device
*dev
, struct device_attribute
*attr
,
633 const char *buf
, size_t count
)
635 return do_sas_phy_reset(dev
, count
, 1);
637 static DEVICE_ATTR(hard_reset
, S_IWUSR
, NULL
, store_sas_hard_reset
);
639 sas_phy_protocol_attr(identify
.initiator_port_protocols
,
640 initiator_port_protocols
);
641 sas_phy_protocol_attr(identify
.target_port_protocols
,
642 target_port_protocols
);
643 sas_phy_simple_attr(identify
.sas_address
, sas_address
, "0x%016llx\n",
645 sas_phy_simple_attr(identify
.phy_identifier
, phy_identifier
, "%d\n", u8
);
646 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
647 sas_phy_linkspeed_attr(negotiated_linkrate
);
648 sas_phy_linkspeed_attr(minimum_linkrate_hw
);
649 sas_phy_linkspeed_rw_attr(minimum_linkrate
);
650 sas_phy_linkspeed_attr(maximum_linkrate_hw
);
651 sas_phy_linkspeed_rw_attr(maximum_linkrate
);
652 sas_phy_linkerror_attr(invalid_dword_count
);
653 sas_phy_linkerror_attr(running_disparity_error_count
);
654 sas_phy_linkerror_attr(loss_of_dword_sync_count
);
655 sas_phy_linkerror_attr(phy_reset_problem_count
);
657 static int sas_phy_setup(struct transport_container
*tc
, struct device
*dev
,
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
);
665 i
->f
->phy_setup(phy
);
670 static DECLARE_TRANSPORT_CLASS(sas_phy_class
,
671 "sas_phy", sas_phy_setup
, NULL
, NULL
);
673 static int sas_phy_match(struct attribute_container
*cont
, struct device
*dev
)
675 struct Scsi_Host
*shost
;
676 struct sas_internal
*i
;
678 if (!scsi_is_sas_phy(dev
))
680 shost
= dev_to_shost(dev
->parent
);
682 if (!shost
->transportt
)
684 if (shost
->transportt
->host_attrs
.ac
.class !=
685 &sas_host_class
.class)
688 i
= to_sas_internal(shost
->transportt
);
689 return &i
->phy_attr_cont
.ac
== cont
;
692 static void sas_phy_release(struct device
*dev
)
694 struct sas_phy
*phy
= dev_to_phy(dev
);
695 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
696 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
698 if (i
->f
->phy_release
)
699 i
->f
->phy_release(phy
);
700 put_device(dev
->parent
);
705 * sas_phy_alloc - allocates and initialize a SAS PHY structure
706 * @parent: Parent device
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
714 * SAS PHY allocated or %NULL if the allocation failed.
716 struct sas_phy
*sas_phy_alloc(struct device
*parent
, int number
)
718 struct Scsi_Host
*shost
= dev_to_shost(parent
);
721 phy
= kzalloc(sizeof(*phy
), GFP_KERNEL
);
725 phy
->number
= number
;
728 device_initialize(&phy
->dev
);
729 phy
->dev
.parent
= get_device(parent
);
730 phy
->dev
.release
= sas_phy_release
;
731 INIT_LIST_HEAD(&phy
->port_siblings
);
732 if (scsi_is_sas_expander_device(parent
)) {
733 struct sas_rphy
*rphy
= dev_to_rphy(parent
);
734 dev_set_name(&phy
->dev
, "phy-%d:%d:%d", shost
->host_no
,
735 rphy
->scsi_target_id
, number
);
737 dev_set_name(&phy
->dev
, "phy-%d:%d", shost
->host_no
, number
);
739 transport_setup_device(&phy
->dev
);
743 EXPORT_SYMBOL(sas_phy_alloc
);
746 * sas_phy_add - add a SAS PHY to the device hierarchy
747 * @phy: The PHY to be added
749 * Publishes a SAS PHY to the rest of the system.
751 int sas_phy_add(struct sas_phy
*phy
)
755 error
= device_add(&phy
->dev
);
757 transport_add_device(&phy
->dev
);
758 transport_configure_device(&phy
->dev
);
763 EXPORT_SYMBOL(sas_phy_add
);
766 * sas_phy_free - free a SAS PHY
767 * @phy: SAS PHY to free
769 * Frees the specified SAS PHY.
772 * This function must only be called on a PHY that has not
773 * successfully been added using sas_phy_add().
775 void sas_phy_free(struct sas_phy
*phy
)
777 transport_destroy_device(&phy
->dev
);
778 put_device(&phy
->dev
);
780 EXPORT_SYMBOL(sas_phy_free
);
783 * sas_phy_delete - remove SAS PHY
784 * @phy: SAS PHY to remove
786 * Removes the specified SAS PHY. If the SAS PHY has an
787 * associated remote PHY it is removed before.
790 sas_phy_delete(struct sas_phy
*phy
)
792 struct device
*dev
= &phy
->dev
;
794 /* this happens if the phy is still part of a port when deleted */
795 BUG_ON(!list_empty(&phy
->port_siblings
));
797 transport_remove_device(dev
);
799 transport_destroy_device(dev
);
802 EXPORT_SYMBOL(sas_phy_delete
);
805 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
806 * @dev: device to check
809 * %1 if the device represents a SAS PHY, %0 else
811 int scsi_is_sas_phy(const struct device
*dev
)
813 return dev
->release
== sas_phy_release
;
815 EXPORT_SYMBOL(scsi_is_sas_phy
);
818 * SAS Port attributes
820 #define sas_port_show_simple(field, name, format_string, cast) \
822 show_sas_port_##name(struct device *dev, \
823 struct device_attribute *attr, char *buf) \
825 struct sas_port *port = transport_class_to_sas_port(dev); \
827 return snprintf(buf, 20, format_string, cast port->field); \
830 #define sas_port_simple_attr(field, name, format_string, type) \
831 sas_port_show_simple(field, name, format_string, (type)) \
832 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
834 sas_port_simple_attr(num_phys
, num_phys
, "%d\n", int);
836 static DECLARE_TRANSPORT_CLASS(sas_port_class
,
837 "sas_port", NULL
, NULL
, NULL
);
839 static int sas_port_match(struct attribute_container
*cont
, struct device
*dev
)
841 struct Scsi_Host
*shost
;
842 struct sas_internal
*i
;
844 if (!scsi_is_sas_port(dev
))
846 shost
= dev_to_shost(dev
->parent
);
848 if (!shost
->transportt
)
850 if (shost
->transportt
->host_attrs
.ac
.class !=
851 &sas_host_class
.class)
854 i
= to_sas_internal(shost
->transportt
);
855 return &i
->port_attr_cont
.ac
== cont
;
859 static void sas_port_release(struct device
*dev
)
861 struct sas_port
*port
= dev_to_sas_port(dev
);
863 BUG_ON(!list_empty(&port
->phy_list
));
865 put_device(dev
->parent
);
869 static void sas_port_create_link(struct sas_port
*port
,
874 res
= sysfs_create_link(&port
->dev
.kobj
, &phy
->dev
.kobj
,
875 dev_name(&phy
->dev
));
878 res
= sysfs_create_link(&phy
->dev
.kobj
, &port
->dev
.kobj
, "port");
883 printk(KERN_ERR
"%s: Cannot create port links, err=%d\n",
887 static void sas_port_delete_link(struct sas_port
*port
,
890 sysfs_remove_link(&port
->dev
.kobj
, dev_name(&phy
->dev
));
891 sysfs_remove_link(&phy
->dev
.kobj
, "port");
894 /** sas_port_alloc - allocate and initialize a SAS port structure
896 * @parent: parent device
897 * @port_id: port number
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.
903 * Returns %NULL on error
905 struct sas_port
*sas_port_alloc(struct device
*parent
, int port_id
)
907 struct Scsi_Host
*shost
= dev_to_shost(parent
);
908 struct sas_port
*port
;
910 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
914 port
->port_identifier
= port_id
;
916 device_initialize(&port
->dev
);
918 port
->dev
.parent
= get_device(parent
);
919 port
->dev
.release
= sas_port_release
;
921 mutex_init(&port
->phy_list_mutex
);
922 INIT_LIST_HEAD(&port
->phy_list
);
924 if (scsi_is_sas_expander_device(parent
)) {
925 struct sas_rphy
*rphy
= dev_to_rphy(parent
);
926 dev_set_name(&port
->dev
, "port-%d:%d:%d", shost
->host_no
,
927 rphy
->scsi_target_id
, port
->port_identifier
);
929 dev_set_name(&port
->dev
, "port-%d:%d", shost
->host_no
,
930 port
->port_identifier
);
932 transport_setup_device(&port
->dev
);
936 EXPORT_SYMBOL(sas_port_alloc
);
938 /** sas_port_alloc_num - allocate and initialize a SAS port structure
940 * @parent: parent device
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.
948 * Returns %NULL on error
950 struct sas_port
*sas_port_alloc_num(struct device
*parent
)
953 struct Scsi_Host
*shost
= dev_to_shost(parent
);
954 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
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
);
962 index
= exp
->next_port_id
++;
964 index
= sas_host
->next_port_id
++;
965 mutex_unlock(&sas_host
->lock
);
966 return sas_port_alloc(parent
, index
);
968 EXPORT_SYMBOL(sas_port_alloc_num
);
971 * sas_port_add - add a SAS port to the device hierarchy
972 * @port: port to be added
974 * publishes a port to the rest of the system
976 int sas_port_add(struct sas_port
*port
)
980 /* No phys should be added until this is made visible */
981 BUG_ON(!list_empty(&port
->phy_list
));
983 error
= device_add(&port
->dev
);
988 transport_add_device(&port
->dev
);
989 transport_configure_device(&port
->dev
);
993 EXPORT_SYMBOL(sas_port_add
);
996 * sas_port_free - free a SAS PORT
997 * @port: SAS PORT to free
999 * Frees the specified SAS PORT.
1002 * This function must only be called on a PORT that has not
1003 * successfully been added using sas_port_add().
1005 void sas_port_free(struct sas_port
*port
)
1007 transport_destroy_device(&port
->dev
);
1008 put_device(&port
->dev
);
1010 EXPORT_SYMBOL(sas_port_free
);
1013 * sas_port_delete - remove SAS PORT
1014 * @port: SAS PORT to remove
1016 * Removes the specified SAS PORT. If the SAS PORT has an
1017 * associated phys, unlink them from the port as well.
1019 void sas_port_delete(struct sas_port
*port
)
1021 struct device
*dev
= &port
->dev
;
1022 struct sas_phy
*phy
, *tmp_phy
;
1025 sas_rphy_delete(port
->rphy
);
1029 mutex_lock(&port
->phy_list_mutex
);
1030 list_for_each_entry_safe(phy
, tmp_phy
, &port
->phy_list
,
1032 sas_port_delete_link(port
, phy
);
1033 list_del_init(&phy
->port_siblings
);
1035 mutex_unlock(&port
->phy_list_mutex
);
1037 if (port
->is_backlink
) {
1038 struct device
*parent
= port
->dev
.parent
;
1040 sysfs_remove_link(&port
->dev
.kobj
, dev_name(parent
));
1041 port
->is_backlink
= 0;
1044 transport_remove_device(dev
);
1046 transport_destroy_device(dev
);
1049 EXPORT_SYMBOL(sas_port_delete
);
1052 * scsi_is_sas_port - check if a struct device represents a SAS port
1053 * @dev: device to check
1056 * %1 if the device represents a SAS Port, %0 else
1058 int scsi_is_sas_port(const struct device
*dev
)
1060 return dev
->release
== sas_port_release
;
1062 EXPORT_SYMBOL(scsi_is_sas_port
);
1065 * sas_port_get_phy - try to take a reference on a port member
1066 * @port: port to check
1068 struct sas_phy
*sas_port_get_phy(struct sas_port
*port
)
1070 struct sas_phy
*phy
;
1072 mutex_lock(&port
->phy_list_mutex
);
1073 if (list_empty(&port
->phy_list
))
1076 struct list_head
*ent
= port
->phy_list
.next
;
1078 phy
= list_entry(ent
, typeof(*phy
), port_siblings
);
1079 get_device(&phy
->dev
);
1081 mutex_unlock(&port
->phy_list_mutex
);
1085 EXPORT_SYMBOL(sas_port_get_phy
);
1088 * sas_port_add_phy - add another phy to a port to form a wide port
1089 * @port: port to add the phy to
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.
1099 void sas_port_add_phy(struct sas_port
*port
, struct sas_phy
*phy
)
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
;
1106 list_for_each_entry(tmp
, &port
->phy_list
, port_siblings
)
1109 /* If this trips, you added a phy that was already
1110 * part of a different port */
1111 if (unlikely(tmp
!= phy
)) {
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
));
1117 sas_port_create_link(port
, phy
);
1118 list_add_tail(&phy
->port_siblings
, &port
->phy_list
);
1121 mutex_unlock(&port
->phy_list_mutex
);
1123 EXPORT_SYMBOL(sas_port_add_phy
);
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
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.
1133 void sas_port_delete_phy(struct sas_port
*port
, struct sas_phy
*phy
)
1135 mutex_lock(&port
->phy_list_mutex
);
1136 sas_port_delete_link(port
, phy
);
1137 list_del_init(&phy
->port_siblings
);
1139 mutex_unlock(&port
->phy_list_mutex
);
1141 EXPORT_SYMBOL(sas_port_delete_phy
);
1143 void sas_port_mark_backlink(struct sas_port
*port
)
1146 struct device
*parent
= port
->dev
.parent
->parent
->parent
;
1148 if (port
->is_backlink
)
1150 port
->is_backlink
= 1;
1151 res
= sysfs_create_link(&port
->dev
.kobj
, &parent
->kobj
,
1157 printk(KERN_ERR
"%s: Cannot create port backlink, err=%d\n",
1161 EXPORT_SYMBOL(sas_port_mark_backlink
);
1164 * SAS remote PHY attributes.
1167 #define sas_rphy_show_simple(field, name, format_string, cast) \
1169 show_sas_rphy_##name(struct device *dev, \
1170 struct device_attribute *attr, char *buf) \
1172 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1174 return snprintf(buf, 20, format_string, cast rphy->field); \
1177 #define sas_rphy_simple_attr(field, name, format_string, type) \
1178 sas_rphy_show_simple(field, name, format_string, (type)) \
1179 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1180 show_sas_rphy_##name, NULL)
1182 #define sas_rphy_show_protocol(field, name) \
1184 show_sas_rphy_##name(struct device *dev, \
1185 struct device_attribute *attr, char *buf) \
1187 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1190 return snprintf(buf, 20, "none\n"); \
1191 return get_sas_protocol_names(rphy->field, buf); \
1194 #define sas_rphy_protocol_attr(field, name) \
1195 sas_rphy_show_protocol(field, name) \
1196 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1197 show_sas_rphy_##name, NULL)
1200 show_sas_rphy_device_type(struct device
*dev
,
1201 struct device_attribute
*attr
, char *buf
)
1203 struct sas_rphy
*rphy
= transport_class_to_rphy(dev
);
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
);
1211 static SAS_DEVICE_ATTR(rphy
, device_type
, S_IRUGO
,
1212 show_sas_rphy_device_type
, NULL
);
1215 show_sas_rphy_enclosure_identifier(struct device
*dev
,
1216 struct device_attribute
*attr
, char *buf
)
1218 struct sas_rphy
*rphy
= transport_class_to_rphy(dev
);
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
);
1225 error
= i
->f
->get_enclosure_identifier(rphy
, &identifier
);
1228 return sprintf(buf
, "0x%llx\n", (unsigned long long)identifier
);
1231 static SAS_DEVICE_ATTR(rphy
, enclosure_identifier
, S_IRUGO
,
1232 show_sas_rphy_enclosure_identifier
, NULL
);
1235 show_sas_rphy_bay_identifier(struct device
*dev
,
1236 struct device_attribute
*attr
, char *buf
)
1238 struct sas_rphy
*rphy
= transport_class_to_rphy(dev
);
1239 struct sas_phy
*phy
= dev_to_phy(rphy
->dev
.parent
);
1240 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
1241 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
1244 val
= i
->f
->get_bay_identifier(rphy
);
1247 return sprintf(buf
, "%d\n", val
);
1250 static SAS_DEVICE_ATTR(rphy
, bay_identifier
, S_IRUGO
,
1251 show_sas_rphy_bay_identifier
, NULL
);
1253 sas_rphy_protocol_attr(identify
.initiator_port_protocols
,
1254 initiator_port_protocols
);
1255 sas_rphy_protocol_attr(identify
.target_port_protocols
, target_port_protocols
);
1256 sas_rphy_simple_attr(identify
.sas_address
, sas_address
, "0x%016llx\n",
1257 unsigned long long);
1258 sas_rphy_simple_attr(identify
.phy_identifier
, phy_identifier
, "%d\n", u8
);
1260 /* only need 8 bytes of data plus header (4 or 8) */
1263 int sas_read_port_mode_page(struct scsi_device
*sdev
)
1265 char *buffer
= kzalloc(BUF_SIZE
, GFP_KERNEL
), *msdata
;
1266 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
1267 struct scsi_mode_data mode_data
;
1273 res
= scsi_mode_sense(sdev
, 1, 0x19, buffer
, BUF_SIZE
, 30*HZ
, 3,
1277 if (!scsi_status_is_good(res
))
1280 msdata
= buffer
+ mode_data
.header_length
+
1281 mode_data
.block_descriptor_length
;
1283 if (msdata
- buffer
> BUF_SIZE
- 8)
1288 rdev
->ready_led_meaning
= msdata
[2] & 0x10 ? 1 : 0;
1289 rdev
->I_T_nexus_loss_timeout
= (msdata
[4] << 8) + msdata
[5];
1290 rdev
->initiator_response_timeout
= (msdata
[6] << 8) + msdata
[7];
1296 EXPORT_SYMBOL(sas_read_port_mode_page
);
1298 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class
,
1299 "sas_end_device", NULL
, NULL
, NULL
);
1301 #define sas_end_dev_show_simple(field, name, format_string, cast) \
1303 show_sas_end_dev_##name(struct device *dev, \
1304 struct device_attribute *attr, char *buf) \
1306 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1307 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1309 return snprintf(buf, 20, format_string, cast rdev->field); \
1312 #define sas_end_dev_simple_attr(field, name, format_string, type) \
1313 sas_end_dev_show_simple(field, name, format_string, (type)) \
1314 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1315 show_sas_end_dev_##name, NULL)
1317 sas_end_dev_simple_attr(ready_led_meaning
, ready_led_meaning
, "%d\n", int);
1318 sas_end_dev_simple_attr(I_T_nexus_loss_timeout
, I_T_nexus_loss_timeout
,
1320 sas_end_dev_simple_attr(initiator_response_timeout
, initiator_response_timeout
,
1322 sas_end_dev_simple_attr(tlr_supported
, tlr_supported
,
1324 sas_end_dev_simple_attr(tlr_enabled
, tlr_enabled
,
1327 static DECLARE_TRANSPORT_CLASS(sas_expander_class
,
1328 "sas_expander", NULL
, NULL
, NULL
);
1330 #define sas_expander_show_simple(field, name, format_string, cast) \
1332 show_sas_expander_##name(struct device *dev, \
1333 struct device_attribute *attr, char *buf) \
1335 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1336 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1338 return snprintf(buf, 20, format_string, cast edev->field); \
1341 #define sas_expander_simple_attr(field, name, format_string, type) \
1342 sas_expander_show_simple(field, name, format_string, (type)) \
1343 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1344 show_sas_expander_##name, NULL)
1346 sas_expander_simple_attr(vendor_id
, vendor_id
, "%s\n", char *);
1347 sas_expander_simple_attr(product_id
, product_id
, "%s\n", char *);
1348 sas_expander_simple_attr(product_rev
, product_rev
, "%s\n", char *);
1349 sas_expander_simple_attr(component_vendor_id
, component_vendor_id
,
1351 sas_expander_simple_attr(component_id
, component_id
, "%u\n", unsigned int);
1352 sas_expander_simple_attr(component_revision_id
, component_revision_id
, "%u\n",
1354 sas_expander_simple_attr(level
, level
, "%d\n", int);
1356 static DECLARE_TRANSPORT_CLASS(sas_rphy_class
,
1357 "sas_device", NULL
, NULL
, NULL
);
1359 static int sas_rphy_match(struct attribute_container
*cont
, struct device
*dev
)
1361 struct Scsi_Host
*shost
;
1362 struct sas_internal
*i
;
1364 if (!scsi_is_sas_rphy(dev
))
1366 shost
= dev_to_shost(dev
->parent
->parent
);
1368 if (!shost
->transportt
)
1370 if (shost
->transportt
->host_attrs
.ac
.class !=
1371 &sas_host_class
.class)
1374 i
= to_sas_internal(shost
->transportt
);
1375 return &i
->rphy_attr_cont
.ac
== cont
;
1378 static int sas_end_dev_match(struct attribute_container
*cont
,
1381 struct Scsi_Host
*shost
;
1382 struct sas_internal
*i
;
1383 struct sas_rphy
*rphy
;
1385 if (!scsi_is_sas_rphy(dev
))
1387 shost
= dev_to_shost(dev
->parent
->parent
);
1388 rphy
= dev_to_rphy(dev
);
1390 if (!shost
->transportt
)
1392 if (shost
->transportt
->host_attrs
.ac
.class !=
1393 &sas_host_class
.class)
1396 i
= to_sas_internal(shost
->transportt
);
1397 return &i
->end_dev_attr_cont
.ac
== cont
&&
1398 rphy
->identify
.device_type
== SAS_END_DEVICE
;
1401 static int sas_expander_match(struct attribute_container
*cont
,
1404 struct Scsi_Host
*shost
;
1405 struct sas_internal
*i
;
1406 struct sas_rphy
*rphy
;
1408 if (!scsi_is_sas_rphy(dev
))
1410 shost
= dev_to_shost(dev
->parent
->parent
);
1411 rphy
= dev_to_rphy(dev
);
1413 if (!shost
->transportt
)
1415 if (shost
->transportt
->host_attrs
.ac
.class !=
1416 &sas_host_class
.class)
1419 i
= to_sas_internal(shost
->transportt
);
1420 return &i
->expander_attr_cont
.ac
== cont
&&
1421 (rphy
->identify
.device_type
== SAS_EDGE_EXPANDER_DEVICE
||
1422 rphy
->identify
.device_type
== SAS_FANOUT_EXPANDER_DEVICE
);
1425 static void sas_expander_release(struct device
*dev
)
1427 struct sas_rphy
*rphy
= dev_to_rphy(dev
);
1428 struct sas_expander_device
*edev
= rphy_to_expander_device(rphy
);
1431 blk_cleanup_queue(rphy
->q
);
1433 put_device(dev
->parent
);
1437 static void sas_end_device_release(struct device
*dev
)
1439 struct sas_rphy
*rphy
= dev_to_rphy(dev
);
1440 struct sas_end_device
*edev
= rphy_to_end_device(rphy
);
1443 blk_cleanup_queue(rphy
->q
);
1445 put_device(dev
->parent
);
1450 * sas_rphy_initialize - common rphy intialization
1451 * @rphy: rphy to initialise
1453 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1454 * initialise the common rphy component of each.
1456 static void sas_rphy_initialize(struct sas_rphy
*rphy
)
1458 INIT_LIST_HEAD(&rphy
->list
);
1462 * sas_end_device_alloc - allocate an rphy for an end device
1463 * @parent: which port
1465 * Allocates an SAS remote PHY structure, connected to @parent.
1468 * SAS PHY allocated or %NULL if the allocation failed.
1470 struct sas_rphy
*sas_end_device_alloc(struct sas_port
*parent
)
1472 struct Scsi_Host
*shost
= dev_to_shost(&parent
->dev
);
1473 struct sas_end_device
*rdev
;
1475 rdev
= kzalloc(sizeof(*rdev
), GFP_KERNEL
);
1480 device_initialize(&rdev
->rphy
.dev
);
1481 rdev
->rphy
.dev
.parent
= get_device(&parent
->dev
);
1482 rdev
->rphy
.dev
.release
= sas_end_device_release
;
1483 if (scsi_is_sas_expander_device(parent
->dev
.parent
)) {
1484 struct sas_rphy
*rphy
= dev_to_rphy(parent
->dev
.parent
);
1485 dev_set_name(&rdev
->rphy
.dev
, "end_device-%d:%d:%d",
1486 shost
->host_no
, rphy
->scsi_target_id
,
1487 parent
->port_identifier
);
1489 dev_set_name(&rdev
->rphy
.dev
, "end_device-%d:%d",
1490 shost
->host_no
, parent
->port_identifier
);
1491 rdev
->rphy
.identify
.device_type
= SAS_END_DEVICE
;
1492 sas_rphy_initialize(&rdev
->rphy
);
1493 transport_setup_device(&rdev
->rphy
.dev
);
1497 EXPORT_SYMBOL(sas_end_device_alloc
);
1500 * sas_expander_alloc - allocate an rphy for an end device
1501 * @parent: which port
1502 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1504 * Allocates an SAS remote PHY structure, connected to @parent.
1507 * SAS PHY allocated or %NULL if the allocation failed.
1509 struct sas_rphy
*sas_expander_alloc(struct sas_port
*parent
,
1510 enum sas_device_type type
)
1512 struct Scsi_Host
*shost
= dev_to_shost(&parent
->dev
);
1513 struct sas_expander_device
*rdev
;
1514 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1516 BUG_ON(type
!= SAS_EDGE_EXPANDER_DEVICE
&&
1517 type
!= SAS_FANOUT_EXPANDER_DEVICE
);
1519 rdev
= kzalloc(sizeof(*rdev
), GFP_KERNEL
);
1524 device_initialize(&rdev
->rphy
.dev
);
1525 rdev
->rphy
.dev
.parent
= get_device(&parent
->dev
);
1526 rdev
->rphy
.dev
.release
= sas_expander_release
;
1527 mutex_lock(&sas_host
->lock
);
1528 rdev
->rphy
.scsi_target_id
= sas_host
->next_expander_id
++;
1529 mutex_unlock(&sas_host
->lock
);
1530 dev_set_name(&rdev
->rphy
.dev
, "expander-%d:%d",
1531 shost
->host_no
, rdev
->rphy
.scsi_target_id
);
1532 rdev
->rphy
.identify
.device_type
= type
;
1533 sas_rphy_initialize(&rdev
->rphy
);
1534 transport_setup_device(&rdev
->rphy
.dev
);
1538 EXPORT_SYMBOL(sas_expander_alloc
);
1541 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
1542 * @rphy: The remote PHY to be added
1544 * Publishes a SAS remote PHY to the rest of the system.
1546 int sas_rphy_add(struct sas_rphy
*rphy
)
1548 struct sas_port
*parent
= dev_to_sas_port(rphy
->dev
.parent
);
1549 struct Scsi_Host
*shost
= dev_to_shost(parent
->dev
.parent
);
1550 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1551 struct sas_identify
*identify
= &rphy
->identify
;
1556 parent
->rphy
= rphy
;
1558 error
= device_add(&rphy
->dev
);
1561 transport_add_device(&rphy
->dev
);
1562 transport_configure_device(&rphy
->dev
);
1563 if (sas_bsg_initialize(shost
, rphy
))
1564 printk("fail to a bsg device %s\n", dev_name(&rphy
->dev
));
1567 mutex_lock(&sas_host
->lock
);
1568 list_add_tail(&rphy
->list
, &sas_host
->rphy_list
);
1569 if (identify
->device_type
== SAS_END_DEVICE
&&
1570 (identify
->target_port_protocols
&
1571 (SAS_PROTOCOL_SSP
|SAS_PROTOCOL_STP
|SAS_PROTOCOL_SATA
)))
1572 rphy
->scsi_target_id
= sas_host
->next_target_id
++;
1573 else if (identify
->device_type
== SAS_END_DEVICE
)
1574 rphy
->scsi_target_id
= -1;
1575 mutex_unlock(&sas_host
->lock
);
1577 if (identify
->device_type
== SAS_END_DEVICE
&&
1578 rphy
->scsi_target_id
!= -1) {
1581 if (identify
->target_port_protocols
& SAS_PROTOCOL_SSP
)
1582 lun
= SCAN_WILD_CARD
;
1586 scsi_scan_target(&rphy
->dev
, 0, rphy
->scsi_target_id
, lun
, 0);
1591 EXPORT_SYMBOL(sas_rphy_add
);
1594 * sas_rphy_free - free a SAS remote PHY
1595 * @rphy: SAS remote PHY to free
1597 * Frees the specified SAS remote PHY.
1600 * This function must only be called on a remote
1601 * PHY that has not successfully been added using
1602 * sas_rphy_add() (or has been sas_rphy_remove()'d)
1604 void sas_rphy_free(struct sas_rphy
*rphy
)
1606 struct device
*dev
= &rphy
->dev
;
1607 struct Scsi_Host
*shost
= dev_to_shost(rphy
->dev
.parent
->parent
);
1608 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1610 mutex_lock(&sas_host
->lock
);
1611 list_del(&rphy
->list
);
1612 mutex_unlock(&sas_host
->lock
);
1614 transport_destroy_device(dev
);
1618 EXPORT_SYMBOL(sas_rphy_free
);
1621 * sas_rphy_delete - remove and free SAS remote PHY
1622 * @rphy: SAS remote PHY to remove and free
1624 * Removes the specified SAS remote PHY and frees it.
1627 sas_rphy_delete(struct sas_rphy
*rphy
)
1629 sas_rphy_remove(rphy
);
1630 sas_rphy_free(rphy
);
1632 EXPORT_SYMBOL(sas_rphy_delete
);
1635 * sas_rphy_unlink - unlink SAS remote PHY
1636 * @rphy: SAS remote phy to unlink from its parent port
1638 * Removes port reference to an rphy
1640 void sas_rphy_unlink(struct sas_rphy
*rphy
)
1642 struct sas_port
*parent
= dev_to_sas_port(rphy
->dev
.parent
);
1644 parent
->rphy
= NULL
;
1646 EXPORT_SYMBOL(sas_rphy_unlink
);
1649 * sas_rphy_remove - remove SAS remote PHY
1650 * @rphy: SAS remote phy to remove
1652 * Removes the specified SAS remote PHY.
1655 sas_rphy_remove(struct sas_rphy
*rphy
)
1657 struct device
*dev
= &rphy
->dev
;
1659 switch (rphy
->identify
.device_type
) {
1660 case SAS_END_DEVICE
:
1661 scsi_remove_target(dev
);
1663 case SAS_EDGE_EXPANDER_DEVICE
:
1664 case SAS_FANOUT_EXPANDER_DEVICE
:
1665 sas_remove_children(dev
);
1671 sas_rphy_unlink(rphy
);
1672 sas_bsg_remove(NULL
, rphy
);
1673 transport_remove_device(dev
);
1676 EXPORT_SYMBOL(sas_rphy_remove
);
1679 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1680 * @dev: device to check
1683 * %1 if the device represents a SAS remote PHY, %0 else
1685 int scsi_is_sas_rphy(const struct device
*dev
)
1687 return dev
->release
== sas_end_device_release
||
1688 dev
->release
== sas_expander_release
;
1690 EXPORT_SYMBOL(scsi_is_sas_rphy
);
1697 static int sas_user_scan(struct Scsi_Host
*shost
, uint channel
,
1700 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1701 struct sas_rphy
*rphy
;
1703 mutex_lock(&sas_host
->lock
);
1704 list_for_each_entry(rphy
, &sas_host
->rphy_list
, list
) {
1705 if (rphy
->identify
.device_type
!= SAS_END_DEVICE
||
1706 rphy
->scsi_target_id
== -1)
1709 if ((channel
== SCAN_WILD_CARD
|| channel
== 0) &&
1710 (id
== SCAN_WILD_CARD
|| id
== rphy
->scsi_target_id
)) {
1711 scsi_scan_target(&rphy
->dev
, 0,
1712 rphy
->scsi_target_id
, lun
, 1);
1715 mutex_unlock(&sas_host
->lock
);
1722 * Setup / Teardown code
1725 #define SETUP_TEMPLATE(attrb, field, perm, test) \
1726 i->private_##attrb[count] = dev_attr_##field; \
1727 i->private_##attrb[count].attr.mode = perm; \
1728 i->attrb[count] = &i->private_##attrb[count]; \
1732 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1733 i->private_##attrb[count] = dev_attr_##field; \
1734 i->private_##attrb[count].attr.mode = perm; \
1736 i->private_##attrb[count].attr.mode = ro_perm; \
1737 i->private_##attrb[count].store = NULL; \
1739 i->attrb[count] = &i->private_##attrb[count]; \
1743 #define SETUP_RPORT_ATTRIBUTE(field) \
1744 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1746 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1747 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1749 #define SETUP_PHY_ATTRIBUTE(field) \
1750 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1752 #define SETUP_PHY_ATTRIBUTE_RW(field) \
1753 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1754 !i->f->set_phy_speed, S_IRUGO)
1756 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1757 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1758 !i->f->func, S_IRUGO)
1760 #define SETUP_PORT_ATTRIBUTE(field) \
1761 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1763 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1764 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1766 #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1767 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1769 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1770 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1772 #define SETUP_END_DEV_ATTRIBUTE(field) \
1773 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1775 #define SETUP_EXPANDER_ATTRIBUTE(field) \
1776 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1779 * sas_attach_transport - instantiate SAS transport template
1780 * @ft: SAS transport class function template
1782 struct scsi_transport_template
*
1783 sas_attach_transport(struct sas_function_template
*ft
)
1785 struct sas_internal
*i
;
1788 i
= kzalloc(sizeof(struct sas_internal
), GFP_KERNEL
);
1792 i
->t
.user_scan
= sas_user_scan
;
1794 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
1795 i
->t
.host_attrs
.ac
.class = &sas_host_class
.class;
1796 i
->t
.host_attrs
.ac
.match
= sas_host_match
;
1797 transport_container_register(&i
->t
.host_attrs
);
1798 i
->t
.host_size
= sizeof(struct sas_host_attrs
);
1800 i
->phy_attr_cont
.ac
.class = &sas_phy_class
.class;
1801 i
->phy_attr_cont
.ac
.attrs
= &i
->phy_attrs
[0];
1802 i
->phy_attr_cont
.ac
.match
= sas_phy_match
;
1803 transport_container_register(&i
->phy_attr_cont
);
1805 i
->port_attr_cont
.ac
.class = &sas_port_class
.class;
1806 i
->port_attr_cont
.ac
.attrs
= &i
->port_attrs
[0];
1807 i
->port_attr_cont
.ac
.match
= sas_port_match
;
1808 transport_container_register(&i
->port_attr_cont
);
1810 i
->rphy_attr_cont
.ac
.class = &sas_rphy_class
.class;
1811 i
->rphy_attr_cont
.ac
.attrs
= &i
->rphy_attrs
[0];
1812 i
->rphy_attr_cont
.ac
.match
= sas_rphy_match
;
1813 transport_container_register(&i
->rphy_attr_cont
);
1815 i
->end_dev_attr_cont
.ac
.class = &sas_end_dev_class
.class;
1816 i
->end_dev_attr_cont
.ac
.attrs
= &i
->end_dev_attrs
[0];
1817 i
->end_dev_attr_cont
.ac
.match
= sas_end_dev_match
;
1818 transport_container_register(&i
->end_dev_attr_cont
);
1820 i
->expander_attr_cont
.ac
.class = &sas_expander_class
.class;
1821 i
->expander_attr_cont
.ac
.attrs
= &i
->expander_attrs
[0];
1822 i
->expander_attr_cont
.ac
.match
= sas_expander_match
;
1823 transport_container_register(&i
->expander_attr_cont
);
1828 SETUP_PHY_ATTRIBUTE(initiator_port_protocols
);
1829 SETUP_PHY_ATTRIBUTE(target_port_protocols
);
1830 SETUP_PHY_ATTRIBUTE(device_type
);
1831 SETUP_PHY_ATTRIBUTE(sas_address
);
1832 SETUP_PHY_ATTRIBUTE(phy_identifier
);
1833 //SETUP_PHY_ATTRIBUTE(port_identifier);
1834 SETUP_PHY_ATTRIBUTE(negotiated_linkrate
);
1835 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw
);
1836 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate
);
1837 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw
);
1838 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate
);
1840 SETUP_PHY_ATTRIBUTE(invalid_dword_count
);
1841 SETUP_PHY_ATTRIBUTE(running_disparity_error_count
);
1842 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count
);
1843 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count
);
1844 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset
, phy_reset
);
1845 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset
, phy_reset
);
1846 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable
, phy_enable
);
1847 i
->phy_attrs
[count
] = NULL
;
1850 SETUP_PORT_ATTRIBUTE(num_phys
);
1851 i
->port_attrs
[count
] = NULL
;
1854 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols
);
1855 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols
);
1856 SETUP_RPORT_ATTRIBUTE(rphy_device_type
);
1857 SETUP_RPORT_ATTRIBUTE(rphy_sas_address
);
1858 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier
);
1859 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier
,
1860 get_enclosure_identifier
);
1861 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier
,
1862 get_bay_identifier
);
1863 i
->rphy_attrs
[count
] = NULL
;
1866 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning
);
1867 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout
);
1868 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout
);
1869 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported
);
1870 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled
);
1871 i
->end_dev_attrs
[count
] = NULL
;
1874 SETUP_EXPANDER_ATTRIBUTE(vendor_id
);
1875 SETUP_EXPANDER_ATTRIBUTE(product_id
);
1876 SETUP_EXPANDER_ATTRIBUTE(product_rev
);
1877 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id
);
1878 SETUP_EXPANDER_ATTRIBUTE(component_id
);
1879 SETUP_EXPANDER_ATTRIBUTE(component_revision_id
);
1880 SETUP_EXPANDER_ATTRIBUTE(level
);
1881 i
->expander_attrs
[count
] = NULL
;
1885 EXPORT_SYMBOL(sas_attach_transport
);
1888 * sas_release_transport - release SAS transport template instance
1889 * @t: transport template instance
1891 void sas_release_transport(struct scsi_transport_template
*t
)
1893 struct sas_internal
*i
= to_sas_internal(t
);
1895 transport_container_unregister(&i
->t
.host_attrs
);
1896 transport_container_unregister(&i
->phy_attr_cont
);
1897 transport_container_unregister(&i
->port_attr_cont
);
1898 transport_container_unregister(&i
->rphy_attr_cont
);
1899 transport_container_unregister(&i
->end_dev_attr_cont
);
1900 transport_container_unregister(&i
->expander_attr_cont
);
1904 EXPORT_SYMBOL(sas_release_transport
);
1906 static __init
int sas_transport_init(void)
1910 error
= transport_class_register(&sas_host_class
);
1913 error
= transport_class_register(&sas_phy_class
);
1915 goto out_unregister_transport
;
1916 error
= transport_class_register(&sas_port_class
);
1918 goto out_unregister_phy
;
1919 error
= transport_class_register(&sas_rphy_class
);
1921 goto out_unregister_port
;
1922 error
= transport_class_register(&sas_end_dev_class
);
1924 goto out_unregister_rphy
;
1925 error
= transport_class_register(&sas_expander_class
);
1927 goto out_unregister_end_dev
;
1931 out_unregister_end_dev
:
1932 transport_class_unregister(&sas_end_dev_class
);
1933 out_unregister_rphy
:
1934 transport_class_unregister(&sas_rphy_class
);
1935 out_unregister_port
:
1936 transport_class_unregister(&sas_port_class
);
1938 transport_class_unregister(&sas_phy_class
);
1939 out_unregister_transport
:
1940 transport_class_unregister(&sas_host_class
);
1946 static void __exit
sas_transport_exit(void)
1948 transport_class_unregister(&sas_host_class
);
1949 transport_class_unregister(&sas_phy_class
);
1950 transport_class_unregister(&sas_port_class
);
1951 transport_class_unregister(&sas_rphy_class
);
1952 transport_class_unregister(&sas_end_dev_class
);
1953 transport_class_unregister(&sas_expander_class
);
1956 MODULE_AUTHOR("Christoph Hellwig");
1957 MODULE_DESCRIPTION("SAS Transport Attributes");
1958 MODULE_LICENSE("GPL");
1960 module_init(sas_transport_init
);
1961 module_exit(sas_transport_exit
);