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 * is_sas_attached - check if device is SAS attached
345 * @sdev: scsi device to check
347 * returns true if the device is SAS attached
349 int is_sas_attached(struct scsi_device
*sdev
)
351 struct Scsi_Host
*shost
= sdev
->host
;
353 return shost
->transportt
->host_attrs
.ac
.class ==
354 &sas_host_class
.class;
356 EXPORT_SYMBOL(is_sas_attached
);
360 * sas_remove_children - tear down a devices SAS data structures
361 * @dev: device belonging to the sas object
363 * Removes all SAS PHYs and remote PHYs for a given object
365 void sas_remove_children(struct device
*dev
)
367 device_for_each_child(dev
, (void *)0, do_sas_phy_delete
);
368 device_for_each_child(dev
, (void *)1, do_sas_phy_delete
);
370 EXPORT_SYMBOL(sas_remove_children
);
373 * sas_remove_host - tear down a Scsi_Host's SAS data structures
374 * @shost: Scsi Host that is torn down
376 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
377 * Must be called just before scsi_remove_host for SAS HBAs.
379 void sas_remove_host(struct Scsi_Host
*shost
)
381 sas_remove_children(&shost
->shost_gendev
);
383 EXPORT_SYMBOL(sas_remove_host
);
386 * sas_tlr_supported - checking TLR bit in vpd 0x90
387 * @sdev: scsi device struct
389 * Check Transport Layer Retries are supported or not.
390 * If vpd page 0x90 is present, TRL is supported.
394 sas_tlr_supported(struct scsi_device
*sdev
)
396 const int vpd_len
= 32;
397 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
398 char *buffer
= kzalloc(vpd_len
, GFP_KERNEL
);
401 if (scsi_get_vpd_page(sdev
, 0x90, buffer
, vpd_len
))
405 * Magic numbers: the VPD Protocol page (0x90)
406 * has a 4 byte header and then one entry per device port
407 * the TLR bit is at offset 8 on each port entry
408 * if we take the first port, that's at total offset 12
410 ret
= buffer
[12] & 0x01;
414 rdev
->tlr_supported
= ret
;
418 EXPORT_SYMBOL_GPL(sas_tlr_supported
);
421 * sas_disable_tlr - setting TLR flags
422 * @sdev: scsi device struct
424 * Seting tlr_enabled flag to 0.
428 sas_disable_tlr(struct scsi_device
*sdev
)
430 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
432 rdev
->tlr_enabled
= 0;
434 EXPORT_SYMBOL_GPL(sas_disable_tlr
);
437 * sas_enable_tlr - setting TLR flags
438 * @sdev: scsi device struct
440 * Seting tlr_enabled flag 1.
443 void sas_enable_tlr(struct scsi_device
*sdev
)
445 unsigned int tlr_supported
= 0;
446 tlr_supported
= sas_tlr_supported(sdev
);
449 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
451 rdev
->tlr_enabled
= 1;
456 EXPORT_SYMBOL_GPL(sas_enable_tlr
);
458 unsigned int sas_is_tlr_enabled(struct scsi_device
*sdev
)
460 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
461 return rdev
->tlr_enabled
;
463 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled
);
469 #define sas_phy_show_simple(field, name, format_string, cast) \
471 show_sas_phy_##name(struct device *dev, \
472 struct device_attribute *attr, char *buf) \
474 struct sas_phy *phy = transport_class_to_phy(dev); \
476 return snprintf(buf, 20, format_string, cast phy->field); \
479 #define sas_phy_simple_attr(field, name, format_string, type) \
480 sas_phy_show_simple(field, name, format_string, (type)) \
481 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
483 #define sas_phy_show_protocol(field, name) \
485 show_sas_phy_##name(struct device *dev, \
486 struct device_attribute *attr, char *buf) \
488 struct sas_phy *phy = transport_class_to_phy(dev); \
491 return snprintf(buf, 20, "none\n"); \
492 return get_sas_protocol_names(phy->field, buf); \
495 #define sas_phy_protocol_attr(field, name) \
496 sas_phy_show_protocol(field, name) \
497 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
499 #define sas_phy_show_linkspeed(field) \
501 show_sas_phy_##field(struct device *dev, \
502 struct device_attribute *attr, char *buf) \
504 struct sas_phy *phy = transport_class_to_phy(dev); \
506 return get_sas_linkspeed_names(phy->field, buf); \
509 /* Fudge to tell if we're minimum or maximum */
510 #define sas_phy_store_linkspeed(field) \
512 store_sas_phy_##field(struct device *dev, \
513 struct device_attribute *attr, \
514 const char *buf, size_t count) \
516 struct sas_phy *phy = transport_class_to_phy(dev); \
517 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
518 struct sas_internal *i = to_sas_internal(shost->transportt); \
520 struct sas_phy_linkrates rates = {0}; \
523 error = set_sas_linkspeed_names(&value, buf); \
526 rates.field = value; \
527 error = i->f->set_phy_speed(phy, &rates); \
529 return error ? error : count; \
532 #define sas_phy_linkspeed_rw_attr(field) \
533 sas_phy_show_linkspeed(field) \
534 sas_phy_store_linkspeed(field) \
535 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
536 store_sas_phy_##field)
538 #define sas_phy_linkspeed_attr(field) \
539 sas_phy_show_linkspeed(field) \
540 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
543 #define sas_phy_show_linkerror(field) \
545 show_sas_phy_##field(struct device *dev, \
546 struct device_attribute *attr, char *buf) \
548 struct sas_phy *phy = transport_class_to_phy(dev); \
549 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
550 struct sas_internal *i = to_sas_internal(shost->transportt); \
553 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
556 return snprintf(buf, 20, "%u\n", phy->field); \
559 #define sas_phy_linkerror_attr(field) \
560 sas_phy_show_linkerror(field) \
561 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
565 show_sas_device_type(struct device
*dev
,
566 struct device_attribute
*attr
, char *buf
)
568 struct sas_phy
*phy
= transport_class_to_phy(dev
);
570 if (!phy
->identify
.device_type
)
571 return snprintf(buf
, 20, "none\n");
572 return get_sas_device_type_names(phy
->identify
.device_type
, buf
);
574 static DEVICE_ATTR(device_type
, S_IRUGO
, show_sas_device_type
, NULL
);
576 static ssize_t
do_sas_phy_enable(struct device
*dev
,
577 size_t count
, int enable
)
579 struct sas_phy
*phy
= transport_class_to_phy(dev
);
580 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
581 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
584 error
= i
->f
->phy_enable(phy
, enable
);
587 phy
->enabled
= enable
;
592 store_sas_phy_enable(struct device
*dev
, struct device_attribute
*attr
,
593 const char *buf
, size_t count
)
600 do_sas_phy_enable(dev
, count
, 0);
603 do_sas_phy_enable(dev
, count
, 1);
613 show_sas_phy_enable(struct device
*dev
, struct device_attribute
*attr
,
616 struct sas_phy
*phy
= transport_class_to_phy(dev
);
618 return snprintf(buf
, 20, "%d", phy
->enabled
);
621 static DEVICE_ATTR(enable
, S_IRUGO
| S_IWUSR
, show_sas_phy_enable
,
622 store_sas_phy_enable
);
625 do_sas_phy_reset(struct device
*dev
, size_t count
, int hard_reset
)
627 struct sas_phy
*phy
= transport_class_to_phy(dev
);
628 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
629 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
632 error
= i
->f
->phy_reset(phy
, hard_reset
);
640 store_sas_link_reset(struct device
*dev
, struct device_attribute
*attr
,
641 const char *buf
, size_t count
)
643 return do_sas_phy_reset(dev
, count
, 0);
645 static DEVICE_ATTR(link_reset
, S_IWUSR
, NULL
, store_sas_link_reset
);
648 store_sas_hard_reset(struct device
*dev
, struct device_attribute
*attr
,
649 const char *buf
, size_t count
)
651 return do_sas_phy_reset(dev
, count
, 1);
653 static DEVICE_ATTR(hard_reset
, S_IWUSR
, NULL
, store_sas_hard_reset
);
655 sas_phy_protocol_attr(identify
.initiator_port_protocols
,
656 initiator_port_protocols
);
657 sas_phy_protocol_attr(identify
.target_port_protocols
,
658 target_port_protocols
);
659 sas_phy_simple_attr(identify
.sas_address
, sas_address
, "0x%016llx\n",
661 sas_phy_simple_attr(identify
.phy_identifier
, phy_identifier
, "%d\n", u8
);
662 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
663 sas_phy_linkspeed_attr(negotiated_linkrate
);
664 sas_phy_linkspeed_attr(minimum_linkrate_hw
);
665 sas_phy_linkspeed_rw_attr(minimum_linkrate
);
666 sas_phy_linkspeed_attr(maximum_linkrate_hw
);
667 sas_phy_linkspeed_rw_attr(maximum_linkrate
);
668 sas_phy_linkerror_attr(invalid_dword_count
);
669 sas_phy_linkerror_attr(running_disparity_error_count
);
670 sas_phy_linkerror_attr(loss_of_dword_sync_count
);
671 sas_phy_linkerror_attr(phy_reset_problem_count
);
673 static int sas_phy_setup(struct transport_container
*tc
, struct device
*dev
,
676 struct sas_phy
*phy
= dev_to_phy(dev
);
677 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
678 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
681 i
->f
->phy_setup(phy
);
686 static DECLARE_TRANSPORT_CLASS(sas_phy_class
,
687 "sas_phy", sas_phy_setup
, NULL
, NULL
);
689 static int sas_phy_match(struct attribute_container
*cont
, struct device
*dev
)
691 struct Scsi_Host
*shost
;
692 struct sas_internal
*i
;
694 if (!scsi_is_sas_phy(dev
))
696 shost
= dev_to_shost(dev
->parent
);
698 if (!shost
->transportt
)
700 if (shost
->transportt
->host_attrs
.ac
.class !=
701 &sas_host_class
.class)
704 i
= to_sas_internal(shost
->transportt
);
705 return &i
->phy_attr_cont
.ac
== cont
;
708 static void sas_phy_release(struct device
*dev
)
710 struct sas_phy
*phy
= dev_to_phy(dev
);
711 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
712 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
714 if (i
->f
->phy_release
)
715 i
->f
->phy_release(phy
);
716 put_device(dev
->parent
);
721 * sas_phy_alloc - allocates and initialize a SAS PHY structure
722 * @parent: Parent device
725 * Allocates an SAS PHY structure. It will be added in the device tree
726 * below the device specified by @parent, which has to be either a Scsi_Host
730 * SAS PHY allocated or %NULL if the allocation failed.
732 struct sas_phy
*sas_phy_alloc(struct device
*parent
, int number
)
734 struct Scsi_Host
*shost
= dev_to_shost(parent
);
737 phy
= kzalloc(sizeof(*phy
), GFP_KERNEL
);
741 phy
->number
= number
;
744 device_initialize(&phy
->dev
);
745 phy
->dev
.parent
= get_device(parent
);
746 phy
->dev
.release
= sas_phy_release
;
747 INIT_LIST_HEAD(&phy
->port_siblings
);
748 if (scsi_is_sas_expander_device(parent
)) {
749 struct sas_rphy
*rphy
= dev_to_rphy(parent
);
750 dev_set_name(&phy
->dev
, "phy-%d:%d:%d", shost
->host_no
,
751 rphy
->scsi_target_id
, number
);
753 dev_set_name(&phy
->dev
, "phy-%d:%d", shost
->host_no
, number
);
755 transport_setup_device(&phy
->dev
);
759 EXPORT_SYMBOL(sas_phy_alloc
);
762 * sas_phy_add - add a SAS PHY to the device hierarchy
763 * @phy: The PHY to be added
765 * Publishes a SAS PHY to the rest of the system.
767 int sas_phy_add(struct sas_phy
*phy
)
771 error
= device_add(&phy
->dev
);
773 transport_add_device(&phy
->dev
);
774 transport_configure_device(&phy
->dev
);
779 EXPORT_SYMBOL(sas_phy_add
);
782 * sas_phy_free - free a SAS PHY
783 * @phy: SAS PHY to free
785 * Frees the specified SAS PHY.
788 * This function must only be called on a PHY that has not
789 * successfully been added using sas_phy_add().
791 void sas_phy_free(struct sas_phy
*phy
)
793 transport_destroy_device(&phy
->dev
);
794 put_device(&phy
->dev
);
796 EXPORT_SYMBOL(sas_phy_free
);
799 * sas_phy_delete - remove SAS PHY
800 * @phy: SAS PHY to remove
802 * Removes the specified SAS PHY. If the SAS PHY has an
803 * associated remote PHY it is removed before.
806 sas_phy_delete(struct sas_phy
*phy
)
808 struct device
*dev
= &phy
->dev
;
810 /* this happens if the phy is still part of a port when deleted */
811 BUG_ON(!list_empty(&phy
->port_siblings
));
813 transport_remove_device(dev
);
815 transport_destroy_device(dev
);
818 EXPORT_SYMBOL(sas_phy_delete
);
821 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
822 * @dev: device to check
825 * %1 if the device represents a SAS PHY, %0 else
827 int scsi_is_sas_phy(const struct device
*dev
)
829 return dev
->release
== sas_phy_release
;
831 EXPORT_SYMBOL(scsi_is_sas_phy
);
834 * SAS Port attributes
836 #define sas_port_show_simple(field, name, format_string, cast) \
838 show_sas_port_##name(struct device *dev, \
839 struct device_attribute *attr, char *buf) \
841 struct sas_port *port = transport_class_to_sas_port(dev); \
843 return snprintf(buf, 20, format_string, cast port->field); \
846 #define sas_port_simple_attr(field, name, format_string, type) \
847 sas_port_show_simple(field, name, format_string, (type)) \
848 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
850 sas_port_simple_attr(num_phys
, num_phys
, "%d\n", int);
852 static DECLARE_TRANSPORT_CLASS(sas_port_class
,
853 "sas_port", NULL
, NULL
, NULL
);
855 static int sas_port_match(struct attribute_container
*cont
, struct device
*dev
)
857 struct Scsi_Host
*shost
;
858 struct sas_internal
*i
;
860 if (!scsi_is_sas_port(dev
))
862 shost
= dev_to_shost(dev
->parent
);
864 if (!shost
->transportt
)
866 if (shost
->transportt
->host_attrs
.ac
.class !=
867 &sas_host_class
.class)
870 i
= to_sas_internal(shost
->transportt
);
871 return &i
->port_attr_cont
.ac
== cont
;
875 static void sas_port_release(struct device
*dev
)
877 struct sas_port
*port
= dev_to_sas_port(dev
);
879 BUG_ON(!list_empty(&port
->phy_list
));
881 put_device(dev
->parent
);
885 static void sas_port_create_link(struct sas_port
*port
,
890 res
= sysfs_create_link(&port
->dev
.kobj
, &phy
->dev
.kobj
,
891 dev_name(&phy
->dev
));
894 res
= sysfs_create_link(&phy
->dev
.kobj
, &port
->dev
.kobj
, "port");
899 printk(KERN_ERR
"%s: Cannot create port links, err=%d\n",
903 static void sas_port_delete_link(struct sas_port
*port
,
906 sysfs_remove_link(&port
->dev
.kobj
, dev_name(&phy
->dev
));
907 sysfs_remove_link(&phy
->dev
.kobj
, "port");
910 /** sas_port_alloc - allocate and initialize a SAS port structure
912 * @parent: parent device
913 * @port_id: port number
915 * Allocates a SAS port structure. It will be added to the device tree
916 * below the device specified by @parent which must be either a Scsi_Host
917 * or a sas_expander_device.
919 * Returns %NULL on error
921 struct sas_port
*sas_port_alloc(struct device
*parent
, int port_id
)
923 struct Scsi_Host
*shost
= dev_to_shost(parent
);
924 struct sas_port
*port
;
926 port
= kzalloc(sizeof(*port
), GFP_KERNEL
);
930 port
->port_identifier
= port_id
;
932 device_initialize(&port
->dev
);
934 port
->dev
.parent
= get_device(parent
);
935 port
->dev
.release
= sas_port_release
;
937 mutex_init(&port
->phy_list_mutex
);
938 INIT_LIST_HEAD(&port
->phy_list
);
940 if (scsi_is_sas_expander_device(parent
)) {
941 struct sas_rphy
*rphy
= dev_to_rphy(parent
);
942 dev_set_name(&port
->dev
, "port-%d:%d:%d", shost
->host_no
,
943 rphy
->scsi_target_id
, port
->port_identifier
);
945 dev_set_name(&port
->dev
, "port-%d:%d", shost
->host_no
,
946 port
->port_identifier
);
948 transport_setup_device(&port
->dev
);
952 EXPORT_SYMBOL(sas_port_alloc
);
954 /** sas_port_alloc_num - allocate and initialize a SAS port structure
956 * @parent: parent device
958 * Allocates a SAS port structure and a number to go with it. This
959 * interface is really for adapters where the port number has no
960 * meansing, so the sas class should manage them. It will be added to
961 * the device tree below the device specified by @parent which must be
962 * either a Scsi_Host or a sas_expander_device.
964 * Returns %NULL on error
966 struct sas_port
*sas_port_alloc_num(struct device
*parent
)
969 struct Scsi_Host
*shost
= dev_to_shost(parent
);
970 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
972 /* FIXME: use idr for this eventually */
973 mutex_lock(&sas_host
->lock
);
974 if (scsi_is_sas_expander_device(parent
)) {
975 struct sas_rphy
*rphy
= dev_to_rphy(parent
);
976 struct sas_expander_device
*exp
= rphy_to_expander_device(rphy
);
978 index
= exp
->next_port_id
++;
980 index
= sas_host
->next_port_id
++;
981 mutex_unlock(&sas_host
->lock
);
982 return sas_port_alloc(parent
, index
);
984 EXPORT_SYMBOL(sas_port_alloc_num
);
987 * sas_port_add - add a SAS port to the device hierarchy
988 * @port: port to be added
990 * publishes a port to the rest of the system
992 int sas_port_add(struct sas_port
*port
)
996 /* No phys should be added until this is made visible */
997 BUG_ON(!list_empty(&port
->phy_list
));
999 error
= device_add(&port
->dev
);
1004 transport_add_device(&port
->dev
);
1005 transport_configure_device(&port
->dev
);
1009 EXPORT_SYMBOL(sas_port_add
);
1012 * sas_port_free - free a SAS PORT
1013 * @port: SAS PORT to free
1015 * Frees the specified SAS PORT.
1018 * This function must only be called on a PORT that has not
1019 * successfully been added using sas_port_add().
1021 void sas_port_free(struct sas_port
*port
)
1023 transport_destroy_device(&port
->dev
);
1024 put_device(&port
->dev
);
1026 EXPORT_SYMBOL(sas_port_free
);
1029 * sas_port_delete - remove SAS PORT
1030 * @port: SAS PORT to remove
1032 * Removes the specified SAS PORT. If the SAS PORT has an
1033 * associated phys, unlink them from the port as well.
1035 void sas_port_delete(struct sas_port
*port
)
1037 struct device
*dev
= &port
->dev
;
1038 struct sas_phy
*phy
, *tmp_phy
;
1041 sas_rphy_delete(port
->rphy
);
1045 mutex_lock(&port
->phy_list_mutex
);
1046 list_for_each_entry_safe(phy
, tmp_phy
, &port
->phy_list
,
1048 sas_port_delete_link(port
, phy
);
1049 list_del_init(&phy
->port_siblings
);
1051 mutex_unlock(&port
->phy_list_mutex
);
1053 if (port
->is_backlink
) {
1054 struct device
*parent
= port
->dev
.parent
;
1056 sysfs_remove_link(&port
->dev
.kobj
, dev_name(parent
));
1057 port
->is_backlink
= 0;
1060 transport_remove_device(dev
);
1062 transport_destroy_device(dev
);
1065 EXPORT_SYMBOL(sas_port_delete
);
1068 * scsi_is_sas_port - check if a struct device represents a SAS port
1069 * @dev: device to check
1072 * %1 if the device represents a SAS Port, %0 else
1074 int scsi_is_sas_port(const struct device
*dev
)
1076 return dev
->release
== sas_port_release
;
1078 EXPORT_SYMBOL(scsi_is_sas_port
);
1081 * sas_port_get_phy - try to take a reference on a port member
1082 * @port: port to check
1084 struct sas_phy
*sas_port_get_phy(struct sas_port
*port
)
1086 struct sas_phy
*phy
;
1088 mutex_lock(&port
->phy_list_mutex
);
1089 if (list_empty(&port
->phy_list
))
1092 struct list_head
*ent
= port
->phy_list
.next
;
1094 phy
= list_entry(ent
, typeof(*phy
), port_siblings
);
1095 get_device(&phy
->dev
);
1097 mutex_unlock(&port
->phy_list_mutex
);
1101 EXPORT_SYMBOL(sas_port_get_phy
);
1104 * sas_port_add_phy - add another phy to a port to form a wide port
1105 * @port: port to add the phy to
1108 * When a port is initially created, it is empty (has no phys). All
1109 * ports must have at least one phy to operated, and all wide ports
1110 * must have at least two. The current code makes no difference
1111 * between ports and wide ports, but the only object that can be
1112 * connected to a remote device is a port, so ports must be formed on
1113 * all devices with phys if they're connected to anything.
1115 void sas_port_add_phy(struct sas_port
*port
, struct sas_phy
*phy
)
1117 mutex_lock(&port
->phy_list_mutex
);
1118 if (unlikely(!list_empty(&phy
->port_siblings
))) {
1119 /* make sure we're already on this port */
1120 struct sas_phy
*tmp
;
1122 list_for_each_entry(tmp
, &port
->phy_list
, port_siblings
)
1125 /* If this trips, you added a phy that was already
1126 * part of a different port */
1127 if (unlikely(tmp
!= phy
)) {
1128 dev_printk(KERN_ERR
, &port
->dev
, "trying to add phy %s fails: it's already part of another port\n",
1129 dev_name(&phy
->dev
));
1133 sas_port_create_link(port
, phy
);
1134 list_add_tail(&phy
->port_siblings
, &port
->phy_list
);
1137 mutex_unlock(&port
->phy_list_mutex
);
1139 EXPORT_SYMBOL(sas_port_add_phy
);
1142 * sas_port_delete_phy - remove a phy from a port or wide port
1143 * @port: port to remove the phy from
1144 * @phy: phy to remove
1146 * This operation is used for tearing down ports again. It must be
1147 * done to every port or wide port before calling sas_port_delete.
1149 void sas_port_delete_phy(struct sas_port
*port
, struct sas_phy
*phy
)
1151 mutex_lock(&port
->phy_list_mutex
);
1152 sas_port_delete_link(port
, phy
);
1153 list_del_init(&phy
->port_siblings
);
1155 mutex_unlock(&port
->phy_list_mutex
);
1157 EXPORT_SYMBOL(sas_port_delete_phy
);
1159 void sas_port_mark_backlink(struct sas_port
*port
)
1162 struct device
*parent
= port
->dev
.parent
->parent
->parent
;
1164 if (port
->is_backlink
)
1166 port
->is_backlink
= 1;
1167 res
= sysfs_create_link(&port
->dev
.kobj
, &parent
->kobj
,
1173 printk(KERN_ERR
"%s: Cannot create port backlink, err=%d\n",
1177 EXPORT_SYMBOL(sas_port_mark_backlink
);
1180 * SAS remote PHY attributes.
1183 #define sas_rphy_show_simple(field, name, format_string, cast) \
1185 show_sas_rphy_##name(struct device *dev, \
1186 struct device_attribute *attr, char *buf) \
1188 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1190 return snprintf(buf, 20, format_string, cast rphy->field); \
1193 #define sas_rphy_simple_attr(field, name, format_string, type) \
1194 sas_rphy_show_simple(field, name, format_string, (type)) \
1195 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1196 show_sas_rphy_##name, NULL)
1198 #define sas_rphy_show_protocol(field, name) \
1200 show_sas_rphy_##name(struct device *dev, \
1201 struct device_attribute *attr, char *buf) \
1203 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1206 return snprintf(buf, 20, "none\n"); \
1207 return get_sas_protocol_names(rphy->field, buf); \
1210 #define sas_rphy_protocol_attr(field, name) \
1211 sas_rphy_show_protocol(field, name) \
1212 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1213 show_sas_rphy_##name, NULL)
1216 show_sas_rphy_device_type(struct device
*dev
,
1217 struct device_attribute
*attr
, char *buf
)
1219 struct sas_rphy
*rphy
= transport_class_to_rphy(dev
);
1221 if (!rphy
->identify
.device_type
)
1222 return snprintf(buf
, 20, "none\n");
1223 return get_sas_device_type_names(
1224 rphy
->identify
.device_type
, buf
);
1227 static SAS_DEVICE_ATTR(rphy
, device_type
, S_IRUGO
,
1228 show_sas_rphy_device_type
, NULL
);
1231 show_sas_rphy_enclosure_identifier(struct device
*dev
,
1232 struct device_attribute
*attr
, char *buf
)
1234 struct sas_rphy
*rphy
= transport_class_to_rphy(dev
);
1235 struct sas_phy
*phy
= dev_to_phy(rphy
->dev
.parent
);
1236 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
1237 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
1241 error
= i
->f
->get_enclosure_identifier(rphy
, &identifier
);
1244 return sprintf(buf
, "0x%llx\n", (unsigned long long)identifier
);
1247 static SAS_DEVICE_ATTR(rphy
, enclosure_identifier
, S_IRUGO
,
1248 show_sas_rphy_enclosure_identifier
, NULL
);
1251 show_sas_rphy_bay_identifier(struct device
*dev
,
1252 struct device_attribute
*attr
, char *buf
)
1254 struct sas_rphy
*rphy
= transport_class_to_rphy(dev
);
1255 struct sas_phy
*phy
= dev_to_phy(rphy
->dev
.parent
);
1256 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
1257 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
1260 val
= i
->f
->get_bay_identifier(rphy
);
1263 return sprintf(buf
, "%d\n", val
);
1266 static SAS_DEVICE_ATTR(rphy
, bay_identifier
, S_IRUGO
,
1267 show_sas_rphy_bay_identifier
, NULL
);
1269 sas_rphy_protocol_attr(identify
.initiator_port_protocols
,
1270 initiator_port_protocols
);
1271 sas_rphy_protocol_attr(identify
.target_port_protocols
, target_port_protocols
);
1272 sas_rphy_simple_attr(identify
.sas_address
, sas_address
, "0x%016llx\n",
1273 unsigned long long);
1274 sas_rphy_simple_attr(identify
.phy_identifier
, phy_identifier
, "%d\n", u8
);
1276 /* only need 8 bytes of data plus header (4 or 8) */
1279 int sas_read_port_mode_page(struct scsi_device
*sdev
)
1281 char *buffer
= kzalloc(BUF_SIZE
, GFP_KERNEL
), *msdata
;
1282 struct sas_end_device
*rdev
= sas_sdev_to_rdev(sdev
);
1283 struct scsi_mode_data mode_data
;
1289 res
= scsi_mode_sense(sdev
, 1, 0x19, buffer
, BUF_SIZE
, 30*HZ
, 3,
1293 if (!scsi_status_is_good(res
))
1296 msdata
= buffer
+ mode_data
.header_length
+
1297 mode_data
.block_descriptor_length
;
1299 if (msdata
- buffer
> BUF_SIZE
- 8)
1304 rdev
->ready_led_meaning
= msdata
[2] & 0x10 ? 1 : 0;
1305 rdev
->I_T_nexus_loss_timeout
= (msdata
[4] << 8) + msdata
[5];
1306 rdev
->initiator_response_timeout
= (msdata
[6] << 8) + msdata
[7];
1312 EXPORT_SYMBOL(sas_read_port_mode_page
);
1314 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class
,
1315 "sas_end_device", NULL
, NULL
, NULL
);
1317 #define sas_end_dev_show_simple(field, name, format_string, cast) \
1319 show_sas_end_dev_##name(struct device *dev, \
1320 struct device_attribute *attr, char *buf) \
1322 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1323 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1325 return snprintf(buf, 20, format_string, cast rdev->field); \
1328 #define sas_end_dev_simple_attr(field, name, format_string, type) \
1329 sas_end_dev_show_simple(field, name, format_string, (type)) \
1330 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1331 show_sas_end_dev_##name, NULL)
1333 sas_end_dev_simple_attr(ready_led_meaning
, ready_led_meaning
, "%d\n", int);
1334 sas_end_dev_simple_attr(I_T_nexus_loss_timeout
, I_T_nexus_loss_timeout
,
1336 sas_end_dev_simple_attr(initiator_response_timeout
, initiator_response_timeout
,
1338 sas_end_dev_simple_attr(tlr_supported
, tlr_supported
,
1340 sas_end_dev_simple_attr(tlr_enabled
, tlr_enabled
,
1343 static DECLARE_TRANSPORT_CLASS(sas_expander_class
,
1344 "sas_expander", NULL
, NULL
, NULL
);
1346 #define sas_expander_show_simple(field, name, format_string, cast) \
1348 show_sas_expander_##name(struct device *dev, \
1349 struct device_attribute *attr, char *buf) \
1351 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1352 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1354 return snprintf(buf, 20, format_string, cast edev->field); \
1357 #define sas_expander_simple_attr(field, name, format_string, type) \
1358 sas_expander_show_simple(field, name, format_string, (type)) \
1359 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1360 show_sas_expander_##name, NULL)
1362 sas_expander_simple_attr(vendor_id
, vendor_id
, "%s\n", char *);
1363 sas_expander_simple_attr(product_id
, product_id
, "%s\n", char *);
1364 sas_expander_simple_attr(product_rev
, product_rev
, "%s\n", char *);
1365 sas_expander_simple_attr(component_vendor_id
, component_vendor_id
,
1367 sas_expander_simple_attr(component_id
, component_id
, "%u\n", unsigned int);
1368 sas_expander_simple_attr(component_revision_id
, component_revision_id
, "%u\n",
1370 sas_expander_simple_attr(level
, level
, "%d\n", int);
1372 static DECLARE_TRANSPORT_CLASS(sas_rphy_class
,
1373 "sas_device", NULL
, NULL
, NULL
);
1375 static int sas_rphy_match(struct attribute_container
*cont
, struct device
*dev
)
1377 struct Scsi_Host
*shost
;
1378 struct sas_internal
*i
;
1380 if (!scsi_is_sas_rphy(dev
))
1382 shost
= dev_to_shost(dev
->parent
->parent
);
1384 if (!shost
->transportt
)
1386 if (shost
->transportt
->host_attrs
.ac
.class !=
1387 &sas_host_class
.class)
1390 i
= to_sas_internal(shost
->transportt
);
1391 return &i
->rphy_attr_cont
.ac
== cont
;
1394 static int sas_end_dev_match(struct attribute_container
*cont
,
1397 struct Scsi_Host
*shost
;
1398 struct sas_internal
*i
;
1399 struct sas_rphy
*rphy
;
1401 if (!scsi_is_sas_rphy(dev
))
1403 shost
= dev_to_shost(dev
->parent
->parent
);
1404 rphy
= dev_to_rphy(dev
);
1406 if (!shost
->transportt
)
1408 if (shost
->transportt
->host_attrs
.ac
.class !=
1409 &sas_host_class
.class)
1412 i
= to_sas_internal(shost
->transportt
);
1413 return &i
->end_dev_attr_cont
.ac
== cont
&&
1414 rphy
->identify
.device_type
== SAS_END_DEVICE
;
1417 static int sas_expander_match(struct attribute_container
*cont
,
1420 struct Scsi_Host
*shost
;
1421 struct sas_internal
*i
;
1422 struct sas_rphy
*rphy
;
1424 if (!scsi_is_sas_rphy(dev
))
1426 shost
= dev_to_shost(dev
->parent
->parent
);
1427 rphy
= dev_to_rphy(dev
);
1429 if (!shost
->transportt
)
1431 if (shost
->transportt
->host_attrs
.ac
.class !=
1432 &sas_host_class
.class)
1435 i
= to_sas_internal(shost
->transportt
);
1436 return &i
->expander_attr_cont
.ac
== cont
&&
1437 (rphy
->identify
.device_type
== SAS_EDGE_EXPANDER_DEVICE
||
1438 rphy
->identify
.device_type
== SAS_FANOUT_EXPANDER_DEVICE
);
1441 static void sas_expander_release(struct device
*dev
)
1443 struct sas_rphy
*rphy
= dev_to_rphy(dev
);
1444 struct sas_expander_device
*edev
= rphy_to_expander_device(rphy
);
1447 blk_cleanup_queue(rphy
->q
);
1449 put_device(dev
->parent
);
1453 static void sas_end_device_release(struct device
*dev
)
1455 struct sas_rphy
*rphy
= dev_to_rphy(dev
);
1456 struct sas_end_device
*edev
= rphy_to_end_device(rphy
);
1459 blk_cleanup_queue(rphy
->q
);
1461 put_device(dev
->parent
);
1466 * sas_rphy_initialize - common rphy intialization
1467 * @rphy: rphy to initialise
1469 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1470 * initialise the common rphy component of each.
1472 static void sas_rphy_initialize(struct sas_rphy
*rphy
)
1474 INIT_LIST_HEAD(&rphy
->list
);
1478 * sas_end_device_alloc - allocate an rphy for an end device
1479 * @parent: which port
1481 * Allocates an SAS remote PHY structure, connected to @parent.
1484 * SAS PHY allocated or %NULL if the allocation failed.
1486 struct sas_rphy
*sas_end_device_alloc(struct sas_port
*parent
)
1488 struct Scsi_Host
*shost
= dev_to_shost(&parent
->dev
);
1489 struct sas_end_device
*rdev
;
1491 rdev
= kzalloc(sizeof(*rdev
), GFP_KERNEL
);
1496 device_initialize(&rdev
->rphy
.dev
);
1497 rdev
->rphy
.dev
.parent
= get_device(&parent
->dev
);
1498 rdev
->rphy
.dev
.release
= sas_end_device_release
;
1499 if (scsi_is_sas_expander_device(parent
->dev
.parent
)) {
1500 struct sas_rphy
*rphy
= dev_to_rphy(parent
->dev
.parent
);
1501 dev_set_name(&rdev
->rphy
.dev
, "end_device-%d:%d:%d",
1502 shost
->host_no
, rphy
->scsi_target_id
,
1503 parent
->port_identifier
);
1505 dev_set_name(&rdev
->rphy
.dev
, "end_device-%d:%d",
1506 shost
->host_no
, parent
->port_identifier
);
1507 rdev
->rphy
.identify
.device_type
= SAS_END_DEVICE
;
1508 sas_rphy_initialize(&rdev
->rphy
);
1509 transport_setup_device(&rdev
->rphy
.dev
);
1513 EXPORT_SYMBOL(sas_end_device_alloc
);
1516 * sas_expander_alloc - allocate an rphy for an end device
1517 * @parent: which port
1518 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1520 * Allocates an SAS remote PHY structure, connected to @parent.
1523 * SAS PHY allocated or %NULL if the allocation failed.
1525 struct sas_rphy
*sas_expander_alloc(struct sas_port
*parent
,
1526 enum sas_device_type type
)
1528 struct Scsi_Host
*shost
= dev_to_shost(&parent
->dev
);
1529 struct sas_expander_device
*rdev
;
1530 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1532 BUG_ON(type
!= SAS_EDGE_EXPANDER_DEVICE
&&
1533 type
!= SAS_FANOUT_EXPANDER_DEVICE
);
1535 rdev
= kzalloc(sizeof(*rdev
), GFP_KERNEL
);
1540 device_initialize(&rdev
->rphy
.dev
);
1541 rdev
->rphy
.dev
.parent
= get_device(&parent
->dev
);
1542 rdev
->rphy
.dev
.release
= sas_expander_release
;
1543 mutex_lock(&sas_host
->lock
);
1544 rdev
->rphy
.scsi_target_id
= sas_host
->next_expander_id
++;
1545 mutex_unlock(&sas_host
->lock
);
1546 dev_set_name(&rdev
->rphy
.dev
, "expander-%d:%d",
1547 shost
->host_no
, rdev
->rphy
.scsi_target_id
);
1548 rdev
->rphy
.identify
.device_type
= type
;
1549 sas_rphy_initialize(&rdev
->rphy
);
1550 transport_setup_device(&rdev
->rphy
.dev
);
1554 EXPORT_SYMBOL(sas_expander_alloc
);
1557 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
1558 * @rphy: The remote PHY to be added
1560 * Publishes a SAS remote PHY to the rest of the system.
1562 int sas_rphy_add(struct sas_rphy
*rphy
)
1564 struct sas_port
*parent
= dev_to_sas_port(rphy
->dev
.parent
);
1565 struct Scsi_Host
*shost
= dev_to_shost(parent
->dev
.parent
);
1566 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1567 struct sas_identify
*identify
= &rphy
->identify
;
1572 parent
->rphy
= rphy
;
1574 error
= device_add(&rphy
->dev
);
1577 transport_add_device(&rphy
->dev
);
1578 transport_configure_device(&rphy
->dev
);
1579 if (sas_bsg_initialize(shost
, rphy
))
1580 printk("fail to a bsg device %s\n", dev_name(&rphy
->dev
));
1583 mutex_lock(&sas_host
->lock
);
1584 list_add_tail(&rphy
->list
, &sas_host
->rphy_list
);
1585 if (identify
->device_type
== SAS_END_DEVICE
&&
1586 (identify
->target_port_protocols
&
1587 (SAS_PROTOCOL_SSP
|SAS_PROTOCOL_STP
|SAS_PROTOCOL_SATA
)))
1588 rphy
->scsi_target_id
= sas_host
->next_target_id
++;
1589 else if (identify
->device_type
== SAS_END_DEVICE
)
1590 rphy
->scsi_target_id
= -1;
1591 mutex_unlock(&sas_host
->lock
);
1593 if (identify
->device_type
== SAS_END_DEVICE
&&
1594 rphy
->scsi_target_id
!= -1) {
1597 if (identify
->target_port_protocols
& SAS_PROTOCOL_SSP
)
1598 lun
= SCAN_WILD_CARD
;
1602 scsi_scan_target(&rphy
->dev
, 0, rphy
->scsi_target_id
, lun
, 0);
1607 EXPORT_SYMBOL(sas_rphy_add
);
1610 * sas_rphy_free - free a SAS remote PHY
1611 * @rphy: SAS remote PHY to free
1613 * Frees the specified SAS remote PHY.
1616 * This function must only be called on a remote
1617 * PHY that has not successfully been added using
1618 * sas_rphy_add() (or has been sas_rphy_remove()'d)
1620 void sas_rphy_free(struct sas_rphy
*rphy
)
1622 struct device
*dev
= &rphy
->dev
;
1623 struct Scsi_Host
*shost
= dev_to_shost(rphy
->dev
.parent
->parent
);
1624 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1626 mutex_lock(&sas_host
->lock
);
1627 list_del(&rphy
->list
);
1628 mutex_unlock(&sas_host
->lock
);
1630 transport_destroy_device(dev
);
1634 EXPORT_SYMBOL(sas_rphy_free
);
1637 * sas_rphy_delete - remove and free SAS remote PHY
1638 * @rphy: SAS remote PHY to remove and free
1640 * Removes the specified SAS remote PHY and frees it.
1643 sas_rphy_delete(struct sas_rphy
*rphy
)
1645 sas_rphy_remove(rphy
);
1646 sas_rphy_free(rphy
);
1648 EXPORT_SYMBOL(sas_rphy_delete
);
1651 * sas_rphy_unlink - unlink SAS remote PHY
1652 * @rphy: SAS remote phy to unlink from its parent port
1654 * Removes port reference to an rphy
1656 void sas_rphy_unlink(struct sas_rphy
*rphy
)
1658 struct sas_port
*parent
= dev_to_sas_port(rphy
->dev
.parent
);
1660 parent
->rphy
= NULL
;
1662 EXPORT_SYMBOL(sas_rphy_unlink
);
1665 * sas_rphy_remove - remove SAS remote PHY
1666 * @rphy: SAS remote phy to remove
1668 * Removes the specified SAS remote PHY.
1671 sas_rphy_remove(struct sas_rphy
*rphy
)
1673 struct device
*dev
= &rphy
->dev
;
1675 switch (rphy
->identify
.device_type
) {
1676 case SAS_END_DEVICE
:
1677 scsi_remove_target(dev
);
1679 case SAS_EDGE_EXPANDER_DEVICE
:
1680 case SAS_FANOUT_EXPANDER_DEVICE
:
1681 sas_remove_children(dev
);
1687 sas_rphy_unlink(rphy
);
1688 sas_bsg_remove(NULL
, rphy
);
1689 transport_remove_device(dev
);
1692 EXPORT_SYMBOL(sas_rphy_remove
);
1695 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1696 * @dev: device to check
1699 * %1 if the device represents a SAS remote PHY, %0 else
1701 int scsi_is_sas_rphy(const struct device
*dev
)
1703 return dev
->release
== sas_end_device_release
||
1704 dev
->release
== sas_expander_release
;
1706 EXPORT_SYMBOL(scsi_is_sas_rphy
);
1713 static int sas_user_scan(struct Scsi_Host
*shost
, uint channel
,
1716 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
1717 struct sas_rphy
*rphy
;
1719 mutex_lock(&sas_host
->lock
);
1720 list_for_each_entry(rphy
, &sas_host
->rphy_list
, list
) {
1721 if (rphy
->identify
.device_type
!= SAS_END_DEVICE
||
1722 rphy
->scsi_target_id
== -1)
1725 if ((channel
== SCAN_WILD_CARD
|| channel
== 0) &&
1726 (id
== SCAN_WILD_CARD
|| id
== rphy
->scsi_target_id
)) {
1727 scsi_scan_target(&rphy
->dev
, 0,
1728 rphy
->scsi_target_id
, lun
, 1);
1731 mutex_unlock(&sas_host
->lock
);
1738 * Setup / Teardown code
1741 #define SETUP_TEMPLATE(attrb, field, perm, test) \
1742 i->private_##attrb[count] = dev_attr_##field; \
1743 i->private_##attrb[count].attr.mode = perm; \
1744 i->attrb[count] = &i->private_##attrb[count]; \
1748 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1749 i->private_##attrb[count] = dev_attr_##field; \
1750 i->private_##attrb[count].attr.mode = perm; \
1752 i->private_##attrb[count].attr.mode = ro_perm; \
1753 i->private_##attrb[count].store = NULL; \
1755 i->attrb[count] = &i->private_##attrb[count]; \
1759 #define SETUP_RPORT_ATTRIBUTE(field) \
1760 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1762 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1763 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1765 #define SETUP_PHY_ATTRIBUTE(field) \
1766 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1768 #define SETUP_PHY_ATTRIBUTE_RW(field) \
1769 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1770 !i->f->set_phy_speed, S_IRUGO)
1772 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1773 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1774 !i->f->func, S_IRUGO)
1776 #define SETUP_PORT_ATTRIBUTE(field) \
1777 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1779 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1780 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1782 #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1783 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1785 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1786 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1788 #define SETUP_END_DEV_ATTRIBUTE(field) \
1789 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1791 #define SETUP_EXPANDER_ATTRIBUTE(field) \
1792 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1795 * sas_attach_transport - instantiate SAS transport template
1796 * @ft: SAS transport class function template
1798 struct scsi_transport_template
*
1799 sas_attach_transport(struct sas_function_template
*ft
)
1801 struct sas_internal
*i
;
1804 i
= kzalloc(sizeof(struct sas_internal
), GFP_KERNEL
);
1808 i
->t
.user_scan
= sas_user_scan
;
1810 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
1811 i
->t
.host_attrs
.ac
.class = &sas_host_class
.class;
1812 i
->t
.host_attrs
.ac
.match
= sas_host_match
;
1813 transport_container_register(&i
->t
.host_attrs
);
1814 i
->t
.host_size
= sizeof(struct sas_host_attrs
);
1816 i
->phy_attr_cont
.ac
.class = &sas_phy_class
.class;
1817 i
->phy_attr_cont
.ac
.attrs
= &i
->phy_attrs
[0];
1818 i
->phy_attr_cont
.ac
.match
= sas_phy_match
;
1819 transport_container_register(&i
->phy_attr_cont
);
1821 i
->port_attr_cont
.ac
.class = &sas_port_class
.class;
1822 i
->port_attr_cont
.ac
.attrs
= &i
->port_attrs
[0];
1823 i
->port_attr_cont
.ac
.match
= sas_port_match
;
1824 transport_container_register(&i
->port_attr_cont
);
1826 i
->rphy_attr_cont
.ac
.class = &sas_rphy_class
.class;
1827 i
->rphy_attr_cont
.ac
.attrs
= &i
->rphy_attrs
[0];
1828 i
->rphy_attr_cont
.ac
.match
= sas_rphy_match
;
1829 transport_container_register(&i
->rphy_attr_cont
);
1831 i
->end_dev_attr_cont
.ac
.class = &sas_end_dev_class
.class;
1832 i
->end_dev_attr_cont
.ac
.attrs
= &i
->end_dev_attrs
[0];
1833 i
->end_dev_attr_cont
.ac
.match
= sas_end_dev_match
;
1834 transport_container_register(&i
->end_dev_attr_cont
);
1836 i
->expander_attr_cont
.ac
.class = &sas_expander_class
.class;
1837 i
->expander_attr_cont
.ac
.attrs
= &i
->expander_attrs
[0];
1838 i
->expander_attr_cont
.ac
.match
= sas_expander_match
;
1839 transport_container_register(&i
->expander_attr_cont
);
1844 SETUP_PHY_ATTRIBUTE(initiator_port_protocols
);
1845 SETUP_PHY_ATTRIBUTE(target_port_protocols
);
1846 SETUP_PHY_ATTRIBUTE(device_type
);
1847 SETUP_PHY_ATTRIBUTE(sas_address
);
1848 SETUP_PHY_ATTRIBUTE(phy_identifier
);
1849 //SETUP_PHY_ATTRIBUTE(port_identifier);
1850 SETUP_PHY_ATTRIBUTE(negotiated_linkrate
);
1851 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw
);
1852 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate
);
1853 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw
);
1854 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate
);
1856 SETUP_PHY_ATTRIBUTE(invalid_dword_count
);
1857 SETUP_PHY_ATTRIBUTE(running_disparity_error_count
);
1858 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count
);
1859 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count
);
1860 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset
, phy_reset
);
1861 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset
, phy_reset
);
1862 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable
, phy_enable
);
1863 i
->phy_attrs
[count
] = NULL
;
1866 SETUP_PORT_ATTRIBUTE(num_phys
);
1867 i
->port_attrs
[count
] = NULL
;
1870 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols
);
1871 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols
);
1872 SETUP_RPORT_ATTRIBUTE(rphy_device_type
);
1873 SETUP_RPORT_ATTRIBUTE(rphy_sas_address
);
1874 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier
);
1875 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier
,
1876 get_enclosure_identifier
);
1877 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier
,
1878 get_bay_identifier
);
1879 i
->rphy_attrs
[count
] = NULL
;
1882 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning
);
1883 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout
);
1884 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout
);
1885 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported
);
1886 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled
);
1887 i
->end_dev_attrs
[count
] = NULL
;
1890 SETUP_EXPANDER_ATTRIBUTE(vendor_id
);
1891 SETUP_EXPANDER_ATTRIBUTE(product_id
);
1892 SETUP_EXPANDER_ATTRIBUTE(product_rev
);
1893 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id
);
1894 SETUP_EXPANDER_ATTRIBUTE(component_id
);
1895 SETUP_EXPANDER_ATTRIBUTE(component_revision_id
);
1896 SETUP_EXPANDER_ATTRIBUTE(level
);
1897 i
->expander_attrs
[count
] = NULL
;
1901 EXPORT_SYMBOL(sas_attach_transport
);
1904 * sas_release_transport - release SAS transport template instance
1905 * @t: transport template instance
1907 void sas_release_transport(struct scsi_transport_template
*t
)
1909 struct sas_internal
*i
= to_sas_internal(t
);
1911 transport_container_unregister(&i
->t
.host_attrs
);
1912 transport_container_unregister(&i
->phy_attr_cont
);
1913 transport_container_unregister(&i
->port_attr_cont
);
1914 transport_container_unregister(&i
->rphy_attr_cont
);
1915 transport_container_unregister(&i
->end_dev_attr_cont
);
1916 transport_container_unregister(&i
->expander_attr_cont
);
1920 EXPORT_SYMBOL(sas_release_transport
);
1922 static __init
int sas_transport_init(void)
1926 error
= transport_class_register(&sas_host_class
);
1929 error
= transport_class_register(&sas_phy_class
);
1931 goto out_unregister_transport
;
1932 error
= transport_class_register(&sas_port_class
);
1934 goto out_unregister_phy
;
1935 error
= transport_class_register(&sas_rphy_class
);
1937 goto out_unregister_port
;
1938 error
= transport_class_register(&sas_end_dev_class
);
1940 goto out_unregister_rphy
;
1941 error
= transport_class_register(&sas_expander_class
);
1943 goto out_unregister_end_dev
;
1947 out_unregister_end_dev
:
1948 transport_class_unregister(&sas_end_dev_class
);
1949 out_unregister_rphy
:
1950 transport_class_unregister(&sas_rphy_class
);
1951 out_unregister_port
:
1952 transport_class_unregister(&sas_port_class
);
1954 transport_class_unregister(&sas_phy_class
);
1955 out_unregister_transport
:
1956 transport_class_unregister(&sas_host_class
);
1962 static void __exit
sas_transport_exit(void)
1964 transport_class_unregister(&sas_host_class
);
1965 transport_class_unregister(&sas_phy_class
);
1966 transport_class_unregister(&sas_port_class
);
1967 transport_class_unregister(&sas_rphy_class
);
1968 transport_class_unregister(&sas_end_dev_class
);
1969 transport_class_unregister(&sas_expander_class
);
1972 MODULE_AUTHOR("Christoph Hellwig");
1973 MODULE_DESCRIPTION("SAS Transport Attributes");
1974 MODULE_LICENSE("GPL");
1976 module_init(sas_transport_init
);
1977 module_exit(sas_transport_exit
);