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 managment
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/err.h>
29 #include <linux/slab.h>
30 #include <linux/string.h>
32 #include <scsi/scsi.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_sas.h>
39 #define SAS_HOST_ATTRS 0
40 #define SAS_PORT_ATTRS 17
41 #define SAS_RPORT_ATTRS 7
42 #define SAS_END_DEV_ATTRS 3
45 struct scsi_transport_template t
;
46 struct sas_function_template
*f
;
48 struct class_device_attribute private_host_attrs
[SAS_HOST_ATTRS
];
49 struct class_device_attribute private_phy_attrs
[SAS_PORT_ATTRS
];
50 struct class_device_attribute private_rphy_attrs
[SAS_RPORT_ATTRS
];
51 struct class_device_attribute private_end_dev_attrs
[SAS_END_DEV_ATTRS
];
53 struct transport_container phy_attr_cont
;
54 struct transport_container rphy_attr_cont
;
55 struct transport_container end_dev_attr_cont
;
58 * The array of null terminated pointers to attributes
59 * needed by scsi_sysfs.c
61 struct class_device_attribute
*host_attrs
[SAS_HOST_ATTRS
+ 1];
62 struct class_device_attribute
*phy_attrs
[SAS_PORT_ATTRS
+ 1];
63 struct class_device_attribute
*rphy_attrs
[SAS_RPORT_ATTRS
+ 1];
64 struct class_device_attribute
*end_dev_attrs
[SAS_END_DEV_ATTRS
+ 1];
66 #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
68 struct sas_host_attrs
{
69 struct list_head rphy_list
;
73 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
77 * Hack to allow attributes of the same name in different objects.
79 #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
80 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
81 __ATTR(_name,_mode,_show,_store)
85 * Pretty printing helpers
88 #define sas_bitfield_name_match(title, table) \
90 get_sas_##title##_names(u32 table_key, char *buf) \
96 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
97 if (table[i].value & table_key) { \
98 len += sprintf(buf + len, "%s%s", \
99 prefix, table[i].name); \
103 len += sprintf(buf + len, "\n"); \
107 #define sas_bitfield_name_search(title, table) \
109 get_sas_##title##_names(u32 table_key, char *buf) \
114 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
115 if (table[i].value == table_key) { \
116 len += sprintf(buf + len, "%s", \
121 len += sprintf(buf + len, "\n"); \
128 } sas_device_type_names
[] = {
129 { SAS_PHY_UNUSED
, "unused" },
130 { SAS_END_DEVICE
, "end device" },
131 { SAS_EDGE_EXPANDER_DEVICE
, "edge expander" },
132 { SAS_FANOUT_EXPANDER_DEVICE
, "fanout expander" },
134 sas_bitfield_name_search(device_type
, sas_device_type_names
)
140 } sas_protocol_names
[] = {
141 { SAS_PROTOCOL_SATA
, "sata" },
142 { SAS_PROTOCOL_SMP
, "smp" },
143 { SAS_PROTOCOL_STP
, "stp" },
144 { SAS_PROTOCOL_SSP
, "ssp" },
146 sas_bitfield_name_match(protocol
, sas_protocol_names
)
151 } sas_linkspeed_names
[] = {
152 { SAS_LINK_RATE_UNKNOWN
, "Unknown" },
153 { SAS_PHY_DISABLED
, "Phy disabled" },
154 { SAS_LINK_RATE_FAILED
, "Link Rate failed" },
155 { SAS_SATA_SPINUP_HOLD
, "Spin-up hold" },
156 { SAS_LINK_RATE_1_5_GBPS
, "1.5 Gbit" },
157 { SAS_LINK_RATE_3_0_GBPS
, "3.0 Gbit" },
158 { SAS_LINK_RATE_6_0_GBPS
, "6.0 Gbit" },
160 sas_bitfield_name_search(linkspeed
, sas_linkspeed_names
)
164 * SAS host attributes
167 static int sas_host_setup(struct transport_container
*tc
, struct device
*dev
,
168 struct class_device
*cdev
)
170 struct Scsi_Host
*shost
= dev_to_shost(dev
);
171 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
173 INIT_LIST_HEAD(&sas_host
->rphy_list
);
174 mutex_init(&sas_host
->lock
);
175 sas_host
->next_target_id
= 0;
179 static DECLARE_TRANSPORT_CLASS(sas_host_class
,
180 "sas_host", sas_host_setup
, NULL
, NULL
);
182 static int sas_host_match(struct attribute_container
*cont
,
185 struct Scsi_Host
*shost
;
186 struct sas_internal
*i
;
188 if (!scsi_is_host_device(dev
))
190 shost
= dev_to_shost(dev
);
192 if (!shost
->transportt
)
194 if (shost
->transportt
->host_attrs
.ac
.class !=
195 &sas_host_class
.class)
198 i
= to_sas_internal(shost
->transportt
);
199 return &i
->t
.host_attrs
.ac
== cont
;
202 static int do_sas_phy_delete(struct device
*dev
, void *data
)
204 if (scsi_is_sas_phy(dev
))
205 sas_phy_delete(dev_to_phy(dev
));
210 * sas_remove_host -- tear down a Scsi_Host's SAS data structures
211 * @shost: Scsi Host that is torn down
213 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
214 * Must be called just before scsi_remove_host for SAS HBAs.
216 void sas_remove_host(struct Scsi_Host
*shost
)
218 device_for_each_child(&shost
->shost_gendev
, NULL
, do_sas_phy_delete
);
220 EXPORT_SYMBOL(sas_remove_host
);
224 * SAS Port attributes
227 #define sas_phy_show_simple(field, name, format_string, cast) \
229 show_sas_phy_##name(struct class_device *cdev, char *buf) \
231 struct sas_phy *phy = transport_class_to_phy(cdev); \
233 return snprintf(buf, 20, format_string, cast phy->field); \
236 #define sas_phy_simple_attr(field, name, format_string, type) \
237 sas_phy_show_simple(field, name, format_string, (type)) \
238 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
240 #define sas_phy_show_protocol(field, name) \
242 show_sas_phy_##name(struct class_device *cdev, char *buf) \
244 struct sas_phy *phy = transport_class_to_phy(cdev); \
247 return snprintf(buf, 20, "none\n"); \
248 return get_sas_protocol_names(phy->field, buf); \
251 #define sas_phy_protocol_attr(field, name) \
252 sas_phy_show_protocol(field, name) \
253 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
255 #define sas_phy_show_linkspeed(field) \
257 show_sas_phy_##field(struct class_device *cdev, char *buf) \
259 struct sas_phy *phy = transport_class_to_phy(cdev); \
261 return get_sas_linkspeed_names(phy->field, buf); \
264 #define sas_phy_linkspeed_attr(field) \
265 sas_phy_show_linkspeed(field) \
266 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
268 #define sas_phy_show_linkerror(field) \
270 show_sas_phy_##field(struct class_device *cdev, char *buf) \
272 struct sas_phy *phy = transport_class_to_phy(cdev); \
273 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
274 struct sas_internal *i = to_sas_internal(shost->transportt); \
277 if (!phy->local_attached) \
280 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
283 return snprintf(buf, 20, "%u\n", phy->field); \
286 #define sas_phy_linkerror_attr(field) \
287 sas_phy_show_linkerror(field) \
288 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
292 show_sas_device_type(struct class_device
*cdev
, char *buf
)
294 struct sas_phy
*phy
= transport_class_to_phy(cdev
);
296 if (!phy
->identify
.device_type
)
297 return snprintf(buf
, 20, "none\n");
298 return get_sas_device_type_names(phy
->identify
.device_type
, buf
);
300 static CLASS_DEVICE_ATTR(device_type
, S_IRUGO
, show_sas_device_type
, NULL
);
302 static ssize_t
do_sas_phy_reset(struct class_device
*cdev
,
303 size_t count
, int hard_reset
)
305 struct sas_phy
*phy
= transport_class_to_phy(cdev
);
306 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
307 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
310 if (!phy
->local_attached
)
313 error
= i
->f
->phy_reset(phy
, hard_reset
);
319 static ssize_t
store_sas_link_reset(struct class_device
*cdev
,
320 const char *buf
, size_t count
)
322 return do_sas_phy_reset(cdev
, count
, 0);
324 static CLASS_DEVICE_ATTR(link_reset
, S_IWUSR
, NULL
, store_sas_link_reset
);
326 static ssize_t
store_sas_hard_reset(struct class_device
*cdev
,
327 const char *buf
, size_t count
)
329 return do_sas_phy_reset(cdev
, count
, 1);
331 static CLASS_DEVICE_ATTR(hard_reset
, S_IWUSR
, NULL
, store_sas_hard_reset
);
333 sas_phy_protocol_attr(identify
.initiator_port_protocols
,
334 initiator_port_protocols
);
335 sas_phy_protocol_attr(identify
.target_port_protocols
,
336 target_port_protocols
);
337 sas_phy_simple_attr(identify
.sas_address
, sas_address
, "0x%016llx\n",
339 sas_phy_simple_attr(identify
.phy_identifier
, phy_identifier
, "%d\n", u8
);
340 sas_phy_simple_attr(port_identifier
, port_identifier
, "%d\n", u8
);
341 sas_phy_linkspeed_attr(negotiated_linkrate
);
342 sas_phy_linkspeed_attr(minimum_linkrate_hw
);
343 sas_phy_linkspeed_attr(minimum_linkrate
);
344 sas_phy_linkspeed_attr(maximum_linkrate_hw
);
345 sas_phy_linkspeed_attr(maximum_linkrate
);
346 sas_phy_linkerror_attr(invalid_dword_count
);
347 sas_phy_linkerror_attr(running_disparity_error_count
);
348 sas_phy_linkerror_attr(loss_of_dword_sync_count
);
349 sas_phy_linkerror_attr(phy_reset_problem_count
);
352 static DECLARE_TRANSPORT_CLASS(sas_phy_class
,
353 "sas_phy", NULL
, NULL
, NULL
);
355 static int sas_phy_match(struct attribute_container
*cont
, struct device
*dev
)
357 struct Scsi_Host
*shost
;
358 struct sas_internal
*i
;
360 if (!scsi_is_sas_phy(dev
))
362 shost
= dev_to_shost(dev
->parent
);
364 if (!shost
->transportt
)
366 if (shost
->transportt
->host_attrs
.ac
.class !=
367 &sas_host_class
.class)
370 i
= to_sas_internal(shost
->transportt
);
371 return &i
->phy_attr_cont
.ac
== cont
;
374 static void sas_phy_release(struct device
*dev
)
376 struct sas_phy
*phy
= dev_to_phy(dev
);
378 put_device(dev
->parent
);
383 * sas_phy_alloc -- allocates and initialize a SAS PHY structure
384 * @parent: Parent device
387 * Allocates an SAS PHY structure. It will be added in the device tree
388 * below the device specified by @parent, which has to be either a Scsi_Host
392 * SAS PHY allocated or %NULL if the allocation failed.
394 struct sas_phy
*sas_phy_alloc(struct device
*parent
, int number
)
396 struct Scsi_Host
*shost
= dev_to_shost(parent
);
399 phy
= kzalloc(sizeof(*phy
), GFP_KERNEL
);
405 phy
->number
= number
;
407 device_initialize(&phy
->dev
);
408 phy
->dev
.parent
= get_device(parent
);
409 phy
->dev
.release
= sas_phy_release
;
410 sprintf(phy
->dev
.bus_id
, "phy-%d:%d", shost
->host_no
, number
);
412 transport_setup_device(&phy
->dev
);
416 EXPORT_SYMBOL(sas_phy_alloc
);
419 * sas_phy_add -- add a SAS PHY to the device hierachy
420 * @phy: The PHY to be added
422 * Publishes a SAS PHY to the rest of the system.
424 int sas_phy_add(struct sas_phy
*phy
)
428 error
= device_add(&phy
->dev
);
430 transport_add_device(&phy
->dev
);
431 transport_configure_device(&phy
->dev
);
436 EXPORT_SYMBOL(sas_phy_add
);
439 * sas_phy_free -- free a SAS PHY
440 * @phy: SAS PHY to free
442 * Frees the specified SAS PHY.
445 * This function must only be called on a PHY that has not
446 * sucessfully been added using sas_phy_add().
448 void sas_phy_free(struct sas_phy
*phy
)
450 transport_destroy_device(&phy
->dev
);
451 put_device(phy
->dev
.parent
);
452 put_device(phy
->dev
.parent
);
453 put_device(phy
->dev
.parent
);
456 EXPORT_SYMBOL(sas_phy_free
);
459 * sas_phy_delete -- remove SAS PHY
460 * @phy: SAS PHY to remove
462 * Removes the specified SAS PHY. If the SAS PHY has an
463 * associated remote PHY it is removed before.
466 sas_phy_delete(struct sas_phy
*phy
)
468 struct device
*dev
= &phy
->dev
;
471 sas_rphy_delete(phy
->rphy
);
473 transport_remove_device(dev
);
475 transport_destroy_device(dev
);
476 put_device(dev
->parent
);
478 EXPORT_SYMBOL(sas_phy_delete
);
481 * scsi_is_sas_phy -- check if a struct device represents a SAS PHY
482 * @dev: device to check
485 * %1 if the device represents a SAS PHY, %0 else
487 int scsi_is_sas_phy(const struct device
*dev
)
489 return dev
->release
== sas_phy_release
;
491 EXPORT_SYMBOL(scsi_is_sas_phy
);
494 * SAS remote PHY attributes.
497 #define sas_rphy_show_simple(field, name, format_string, cast) \
499 show_sas_rphy_##name(struct class_device *cdev, char *buf) \
501 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
503 return snprintf(buf, 20, format_string, cast rphy->field); \
506 #define sas_rphy_simple_attr(field, name, format_string, type) \
507 sas_rphy_show_simple(field, name, format_string, (type)) \
508 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
509 show_sas_rphy_##name, NULL)
511 #define sas_rphy_show_protocol(field, name) \
513 show_sas_rphy_##name(struct class_device *cdev, char *buf) \
515 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
518 return snprintf(buf, 20, "none\n"); \
519 return get_sas_protocol_names(rphy->field, buf); \
522 #define sas_rphy_protocol_attr(field, name) \
523 sas_rphy_show_protocol(field, name) \
524 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
525 show_sas_rphy_##name, NULL)
528 show_sas_rphy_device_type(struct class_device
*cdev
, char *buf
)
530 struct sas_rphy
*rphy
= transport_class_to_rphy(cdev
);
532 if (!rphy
->identify
.device_type
)
533 return snprintf(buf
, 20, "none\n");
534 return get_sas_device_type_names(
535 rphy
->identify
.device_type
, buf
);
538 static SAS_CLASS_DEVICE_ATTR(rphy
, device_type
, S_IRUGO
,
539 show_sas_rphy_device_type
, NULL
);
542 show_sas_rphy_enclosure_identifier(struct class_device
*cdev
, char *buf
)
544 struct sas_rphy
*rphy
= transport_class_to_rphy(cdev
);
545 struct sas_phy
*phy
= dev_to_phy(rphy
->dev
.parent
);
546 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
547 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
552 * Only devices behind an expander are supported, because the
553 * enclosure identifier is a SMP feature.
555 if (phy
->local_attached
)
558 error
= i
->f
->get_enclosure_identifier(rphy
, &identifier
);
561 return sprintf(buf
, "0x%llx\n", (unsigned long long)identifier
);
564 static SAS_CLASS_DEVICE_ATTR(rphy
, enclosure_identifier
, S_IRUGO
,
565 show_sas_rphy_enclosure_identifier
, NULL
);
568 show_sas_rphy_bay_identifier(struct class_device
*cdev
, char *buf
)
570 struct sas_rphy
*rphy
= transport_class_to_rphy(cdev
);
571 struct sas_phy
*phy
= dev_to_phy(rphy
->dev
.parent
);
572 struct Scsi_Host
*shost
= dev_to_shost(phy
->dev
.parent
);
573 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
576 if (phy
->local_attached
)
579 val
= i
->f
->get_bay_identifier(rphy
);
582 return sprintf(buf
, "%d\n", val
);
585 static SAS_CLASS_DEVICE_ATTR(rphy
, bay_identifier
, S_IRUGO
,
586 show_sas_rphy_bay_identifier
, NULL
);
588 sas_rphy_protocol_attr(identify
.initiator_port_protocols
,
589 initiator_port_protocols
);
590 sas_rphy_protocol_attr(identify
.target_port_protocols
, target_port_protocols
);
591 sas_rphy_simple_attr(identify
.sas_address
, sas_address
, "0x%016llx\n",
593 sas_rphy_simple_attr(identify
.phy_identifier
, phy_identifier
, "%d\n", u8
);
595 /* only need 8 bytes of data plus header (4 or 8) */
598 int sas_read_port_mode_page(struct scsi_device
*sdev
)
600 char *buffer
= kzalloc(BUF_SIZE
, GFP_KERNEL
), *msdata
;
601 struct sas_rphy
*rphy
= target_to_rphy(sdev
->sdev_target
);
602 struct sas_end_device
*rdev
;
603 struct scsi_mode_data mode_data
;
606 BUG_ON(rphy
->identify
.device_type
!= SAS_END_DEVICE
);
608 rdev
= rphy_to_end_device(rphy
);
613 res
= scsi_mode_sense(sdev
, 1, 0x19, buffer
, BUF_SIZE
, 30*HZ
, 3,
617 if (!scsi_status_is_good(res
))
620 msdata
= buffer
+ mode_data
.header_length
+
621 mode_data
.block_descriptor_length
;
623 if (msdata
- buffer
> BUF_SIZE
- 8)
628 rdev
->ready_led_meaning
= msdata
[2] & 0x10 ? 1 : 0;
629 rdev
->I_T_nexus_loss_timeout
= (msdata
[4] << 8) + msdata
[5];
630 rdev
->initiator_response_timeout
= (msdata
[6] << 8) + msdata
[7];
636 EXPORT_SYMBOL(sas_read_port_mode_page
);
638 #define sas_end_dev_show_simple(field, name, format_string, cast) \
640 show_sas_end_dev_##name(struct class_device *cdev, char *buf) \
642 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
643 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
645 return snprintf(buf, 20, format_string, cast rdev->field); \
648 #define sas_end_dev_simple_attr(field, name, format_string, type) \
649 sas_end_dev_show_simple(field, name, format_string, (type)) \
650 static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
651 show_sas_end_dev_##name, NULL)
653 sas_end_dev_simple_attr(ready_led_meaning
, ready_led_meaning
, "%d\n", int);
654 sas_end_dev_simple_attr(I_T_nexus_loss_timeout
, I_T_nexus_loss_timeout
,
656 sas_end_dev_simple_attr(initiator_response_timeout
, initiator_response_timeout
,
659 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class
,
660 "sas_end_device", NULL
, NULL
, NULL
);
662 static DECLARE_TRANSPORT_CLASS(sas_rphy_class
,
663 "sas_rphy", NULL
, NULL
, NULL
);
665 static int sas_rphy_match(struct attribute_container
*cont
, struct device
*dev
)
667 struct Scsi_Host
*shost
;
668 struct sas_internal
*i
;
670 if (!scsi_is_sas_rphy(dev
))
672 shost
= dev_to_shost(dev
->parent
->parent
);
674 if (!shost
->transportt
)
676 if (shost
->transportt
->host_attrs
.ac
.class !=
677 &sas_host_class
.class)
680 i
= to_sas_internal(shost
->transportt
);
681 return &i
->rphy_attr_cont
.ac
== cont
;
684 static int sas_end_dev_match(struct attribute_container
*cont
,
687 struct Scsi_Host
*shost
;
688 struct sas_internal
*i
;
689 struct sas_rphy
*rphy
;
691 if (!scsi_is_sas_rphy(dev
))
693 shost
= dev_to_shost(dev
->parent
->parent
);
694 rphy
= dev_to_rphy(dev
);
696 if (!shost
->transportt
)
698 if (shost
->transportt
->host_attrs
.ac
.class !=
699 &sas_host_class
.class)
702 i
= to_sas_internal(shost
->transportt
);
703 return &i
->end_dev_attr_cont
.ac
== cont
&&
704 rphy
->identify
.device_type
== SAS_END_DEVICE
&&
705 /* FIXME: remove contained eventually */
709 static void sas_rphy_release(struct device
*dev
)
711 struct sas_rphy
*rphy
= dev_to_rphy(dev
);
713 put_device(dev
->parent
);
718 * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure
719 * @parent: SAS PHY this remote PHY is conneted to
721 * Allocates an SAS remote PHY structure, connected to @parent.
724 * SAS PHY allocated or %NULL if the allocation failed.
726 struct sas_rphy
*sas_rphy_alloc(struct sas_phy
*parent
)
728 struct Scsi_Host
*shost
= dev_to_shost(&parent
->dev
);
729 struct sas_rphy
*rphy
;
731 rphy
= kzalloc(sizeof(*rphy
), GFP_KERNEL
);
733 put_device(&parent
->dev
);
737 device_initialize(&rphy
->dev
);
738 rphy
->dev
.parent
= get_device(&parent
->dev
);
739 rphy
->dev
.release
= sas_rphy_release
;
740 sprintf(rphy
->dev
.bus_id
, "rphy-%d:%d-%d",
741 shost
->host_no
, parent
->port_identifier
, parent
->number
);
742 transport_setup_device(&rphy
->dev
);
746 EXPORT_SYMBOL(sas_rphy_alloc
);
749 * sas_end_device_alloc - allocate an rphy for an end device
751 * Allocates an SAS remote PHY structure, connected to @parent.
754 * SAS PHY allocated or %NULL if the allocation failed.
756 struct sas_rphy
*sas_end_device_alloc(struct sas_phy
*parent
)
758 struct Scsi_Host
*shost
= dev_to_shost(&parent
->dev
);
759 struct sas_end_device
*rdev
;
761 rdev
= kzalloc(sizeof(*rdev
), GFP_KERNEL
);
763 put_device(&parent
->dev
);
767 device_initialize(&rdev
->rphy
.dev
);
768 rdev
->rphy
.dev
.parent
= get_device(&parent
->dev
);
769 rdev
->rphy
.dev
.release
= sas_rphy_release
;
770 sprintf(rdev
->rphy
.dev
.bus_id
, "rphy-%d:%d-%d",
771 shost
->host_no
, parent
->port_identifier
, parent
->number
);
772 rdev
->rphy
.identify
.device_type
= SAS_END_DEVICE
;
773 /* FIXME: mark the rphy as being contained in a larger structure */
774 rdev
->rphy
.contained
= 1;
775 transport_setup_device(&rdev
->rphy
.dev
);
779 EXPORT_SYMBOL(sas_end_device_alloc
);
783 * sas_rphy_add -- add a SAS remote PHY to the device hierachy
784 * @rphy: The remote PHY to be added
786 * Publishes a SAS remote PHY to the rest of the system.
788 int sas_rphy_add(struct sas_rphy
*rphy
)
790 struct sas_phy
*parent
= dev_to_phy(rphy
->dev
.parent
);
791 struct Scsi_Host
*shost
= dev_to_shost(parent
->dev
.parent
);
792 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
793 struct sas_identify
*identify
= &rphy
->identify
;
800 error
= device_add(&rphy
->dev
);
803 transport_add_device(&rphy
->dev
);
804 transport_configure_device(&rphy
->dev
);
806 mutex_lock(&sas_host
->lock
);
807 list_add_tail(&rphy
->list
, &sas_host
->rphy_list
);
808 if (identify
->device_type
== SAS_END_DEVICE
&&
809 (identify
->target_port_protocols
&
810 (SAS_PROTOCOL_SSP
|SAS_PROTOCOL_STP
|SAS_PROTOCOL_SATA
)))
811 rphy
->scsi_target_id
= sas_host
->next_target_id
++;
813 rphy
->scsi_target_id
= -1;
814 mutex_unlock(&sas_host
->lock
);
816 if (rphy
->scsi_target_id
!= -1) {
817 scsi_scan_target(&rphy
->dev
, parent
->port_identifier
,
818 rphy
->scsi_target_id
, ~0, 0);
823 EXPORT_SYMBOL(sas_rphy_add
);
826 * sas_rphy_free -- free a SAS remote PHY
827 * @rphy SAS remote PHY to free
829 * Frees the specified SAS remote PHY.
832 * This function must only be called on a remote
833 * PHY that has not sucessfully been added using
836 void sas_rphy_free(struct sas_rphy
*rphy
)
838 struct Scsi_Host
*shost
= dev_to_shost(rphy
->dev
.parent
->parent
);
839 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
841 mutex_lock(&sas_host
->lock
);
842 list_del(&rphy
->list
);
843 mutex_unlock(&sas_host
->lock
);
845 transport_destroy_device(&rphy
->dev
);
846 put_device(rphy
->dev
.parent
);
847 put_device(rphy
->dev
.parent
);
848 put_device(rphy
->dev
.parent
);
851 EXPORT_SYMBOL(sas_rphy_free
);
854 * sas_rphy_delete -- remove SAS remote PHY
855 * @rphy: SAS remote PHY to remove
857 * Removes the specified SAS remote PHY.
860 sas_rphy_delete(struct sas_rphy
*rphy
)
862 struct device
*dev
= &rphy
->dev
;
863 struct sas_phy
*parent
= dev_to_phy(dev
->parent
);
864 struct Scsi_Host
*shost
= dev_to_shost(parent
->dev
.parent
);
865 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
867 switch (rphy
->identify
.device_type
) {
869 scsi_remove_target(dev
);
871 case SAS_EDGE_EXPANDER_DEVICE
:
872 case SAS_FANOUT_EXPANDER_DEVICE
:
873 device_for_each_child(dev
, NULL
, do_sas_phy_delete
);
879 transport_remove_device(dev
);
881 transport_destroy_device(dev
);
883 mutex_lock(&sas_host
->lock
);
884 list_del(&rphy
->list
);
885 mutex_unlock(&sas_host
->lock
);
889 put_device(&parent
->dev
);
891 EXPORT_SYMBOL(sas_rphy_delete
);
894 * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
895 * @dev: device to check
898 * %1 if the device represents a SAS remote PHY, %0 else
900 int scsi_is_sas_rphy(const struct device
*dev
)
902 return dev
->release
== sas_rphy_release
;
904 EXPORT_SYMBOL(scsi_is_sas_rphy
);
911 static int sas_user_scan(struct Scsi_Host
*shost
, uint channel
,
914 struct sas_host_attrs
*sas_host
= to_sas_host_attrs(shost
);
915 struct sas_rphy
*rphy
;
917 mutex_lock(&sas_host
->lock
);
918 list_for_each_entry(rphy
, &sas_host
->rphy_list
, list
) {
919 struct sas_phy
*parent
= dev_to_phy(rphy
->dev
.parent
);
921 if (rphy
->scsi_target_id
== -1)
924 if ((channel
== SCAN_WILD_CARD
|| channel
== parent
->port_identifier
) &&
925 (id
== SCAN_WILD_CARD
|| id
== rphy
->scsi_target_id
)) {
926 scsi_scan_target(&rphy
->dev
, parent
->port_identifier
,
927 rphy
->scsi_target_id
, lun
, 1);
930 mutex_unlock(&sas_host
->lock
);
937 * Setup / Teardown code
940 #define SETUP_TEMPLATE(attrb, field, perm, test) \
941 i->private_##attrb[count] = class_device_attr_##field; \
942 i->private_##attrb[count].attr.mode = perm; \
943 i->private_##attrb[count].store = NULL; \
944 i->attrb[count] = &i->private_##attrb[count]; \
949 #define SETUP_RPORT_ATTRIBUTE(field) \
950 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
952 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
953 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
955 #define SETUP_PORT_ATTRIBUTE(field) \
956 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
958 #define SETUP_OPTIONAL_PORT_ATTRIBUTE(field, func) \
959 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
961 #define SETUP_PORT_ATTRIBUTE_WRONLY(field) \
962 SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)
964 #define SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(field, func) \
965 SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)
967 #define SETUP_END_DEV_ATTRIBUTE(field) \
968 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
971 * sas_attach_transport -- instantiate SAS transport template
972 * @ft: SAS transport class function template
974 struct scsi_transport_template
*
975 sas_attach_transport(struct sas_function_template
*ft
)
977 struct sas_internal
*i
;
980 i
= kzalloc(sizeof(struct sas_internal
), GFP_KERNEL
);
984 i
->t
.user_scan
= sas_user_scan
;
986 i
->t
.host_attrs
.ac
.attrs
= &i
->host_attrs
[0];
987 i
->t
.host_attrs
.ac
.class = &sas_host_class
.class;
988 i
->t
.host_attrs
.ac
.match
= sas_host_match
;
989 transport_container_register(&i
->t
.host_attrs
);
990 i
->t
.host_size
= sizeof(struct sas_host_attrs
);
992 i
->phy_attr_cont
.ac
.class = &sas_phy_class
.class;
993 i
->phy_attr_cont
.ac
.attrs
= &i
->phy_attrs
[0];
994 i
->phy_attr_cont
.ac
.match
= sas_phy_match
;
995 transport_container_register(&i
->phy_attr_cont
);
997 i
->rphy_attr_cont
.ac
.class = &sas_rphy_class
.class;
998 i
->rphy_attr_cont
.ac
.attrs
= &i
->rphy_attrs
[0];
999 i
->rphy_attr_cont
.ac
.match
= sas_rphy_match
;
1000 transport_container_register(&i
->rphy_attr_cont
);
1002 i
->end_dev_attr_cont
.ac
.class = &sas_end_dev_class
.class;
1003 i
->end_dev_attr_cont
.ac
.attrs
= &i
->end_dev_attrs
[0];
1004 i
->end_dev_attr_cont
.ac
.match
= sas_end_dev_match
;
1005 transport_container_register(&i
->end_dev_attr_cont
);
1010 i
->host_attrs
[count
] = NULL
;
1013 SETUP_PORT_ATTRIBUTE(initiator_port_protocols
);
1014 SETUP_PORT_ATTRIBUTE(target_port_protocols
);
1015 SETUP_PORT_ATTRIBUTE(device_type
);
1016 SETUP_PORT_ATTRIBUTE(sas_address
);
1017 SETUP_PORT_ATTRIBUTE(phy_identifier
);
1018 SETUP_PORT_ATTRIBUTE(port_identifier
);
1019 SETUP_PORT_ATTRIBUTE(negotiated_linkrate
);
1020 SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw
);
1021 SETUP_PORT_ATTRIBUTE(minimum_linkrate
);
1022 SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw
);
1023 SETUP_PORT_ATTRIBUTE(maximum_linkrate
);
1025 SETUP_PORT_ATTRIBUTE(invalid_dword_count
);
1026 SETUP_PORT_ATTRIBUTE(running_disparity_error_count
);
1027 SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count
);
1028 SETUP_PORT_ATTRIBUTE(phy_reset_problem_count
);
1029 SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(link_reset
, phy_reset
);
1030 SETUP_OPTIONAL_PORT_ATTRIBUTE_WRONLY(hard_reset
, phy_reset
);
1031 i
->phy_attrs
[count
] = NULL
;
1034 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols
);
1035 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols
);
1036 SETUP_RPORT_ATTRIBUTE(rphy_device_type
);
1037 SETUP_RPORT_ATTRIBUTE(rphy_sas_address
);
1038 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier
);
1039 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier
,
1040 get_enclosure_identifier
);
1041 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier
,
1042 get_bay_identifier
);
1043 i
->rphy_attrs
[count
] = NULL
;
1046 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning
);
1047 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout
);
1048 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout
);
1049 i
->end_dev_attrs
[count
] = NULL
;
1053 EXPORT_SYMBOL(sas_attach_transport
);
1056 * sas_release_transport -- release SAS transport template instance
1057 * @t: transport template instance
1059 void sas_release_transport(struct scsi_transport_template
*t
)
1061 struct sas_internal
*i
= to_sas_internal(t
);
1063 transport_container_unregister(&i
->t
.host_attrs
);
1064 transport_container_unregister(&i
->phy_attr_cont
);
1065 transport_container_unregister(&i
->rphy_attr_cont
);
1069 EXPORT_SYMBOL(sas_release_transport
);
1071 static __init
int sas_transport_init(void)
1075 error
= transport_class_register(&sas_host_class
);
1078 error
= transport_class_register(&sas_phy_class
);
1080 goto out_unregister_transport
;
1081 error
= transport_class_register(&sas_rphy_class
);
1083 goto out_unregister_phy
;
1084 error
= transport_class_register(&sas_end_dev_class
);
1086 goto out_unregister_rphy
;
1090 out_unregister_rphy
:
1091 transport_class_unregister(&sas_rphy_class
);
1093 transport_class_unregister(&sas_phy_class
);
1094 out_unregister_transport
:
1095 transport_class_unregister(&sas_host_class
);
1101 static void __exit
sas_transport_exit(void)
1103 transport_class_unregister(&sas_host_class
);
1104 transport_class_unregister(&sas_phy_class
);
1105 transport_class_unregister(&sas_rphy_class
);
1106 transport_class_unregister(&sas_end_dev_class
);
1109 MODULE_AUTHOR("Christoph Hellwig");
1110 MODULE_DESCRIPTION("SAS Transphy Attributes");
1111 MODULE_LICENSE("GPL");
1113 module_init(sas_transport_init
);
1114 module_exit(sas_transport_exit
);