2 * Copyright (C) 2005 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>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_sas.h>
36 #define SAS_HOST_ATTRS 0
37 #define SAS_PORT_ATTRS 11
38 #define SAS_RPORT_ATTRS 5
41 struct scsi_transport_template t;
42 struct sas_function_template *f;
44 struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];
45 struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];
46 struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];
48 struct transport_container phy_attr_cont;
49 struct transport_container rphy_attr_cont;
52 * The array of null terminated pointers to attributes
53 * needed by scsi_sysfs.c
55 struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];
56 struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];
57 struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];
59 #define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
61 struct sas_host_attrs {
62 struct list_head rphy_list;
66 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
70 * Hack to allow attributes of the same name in different objects.
72 #define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
73 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
74 __ATTR(_name,_mode,_show,_store)
78 * Pretty printing helpers
81 #define sas_bitfield_name_match(title, table) \
83 get_sas_##title##_names(u32 table_key, char *buf) \
89 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
90 if (table[i].value & table_key) { \
91 len += sprintf(buf + len, "%s%s", \
92 prefix, table[i].name); \
96 len += sprintf(buf + len, "\n"); \
100 #define sas_bitfield_name_search(title, table) \
102 get_sas_##title##_names(u32 table_key, char *buf) \
107 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
108 if (table[i].value == table_key) { \
109 len += sprintf(buf + len, "%s", \
114 len += sprintf(buf + len, "\n"); \
121 } sas_device_type_names[] = {
122 { SAS_PHY_UNUSED, "unused" },
123 { SAS_END_DEVICE, "end device" },
124 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
125 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
127 sas_bitfield_name_search(device_type, sas_device_type_names)
133 } sas_protocol_names[] = {
134 { SAS_PROTOCOL_SATA, "sata" },
135 { SAS_PROTOCOL_SMP, "smp" },
136 { SAS_PROTOCOL_STP, "stp" },
137 { SAS_PROTOCOL_SSP, "ssp" },
139 sas_bitfield_name_match(protocol, sas_protocol_names)
144 } sas_linkspeed_names[] = {
145 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
146 { SAS_PHY_DISABLED, "Phy disabled" },
147 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
148 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
149 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
150 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
152 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
156 * SAS host attributes
159 static int sas_host_setup(struct transport_container *tc, struct device *dev,
160 struct class_device *cdev)
162 struct Scsi_Host *shost = dev_to_shost(dev);
163 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
165 INIT_LIST_HEAD(&sas_host->rphy_list);
166 spin_lock_init(&sas_host->lock);
167 sas_host->next_target_id = 0;
171 static DECLARE_TRANSPORT_CLASS(sas_host_class,
172 "sas_host", sas_host_setup, NULL, NULL);
174 static int sas_host_match(struct attribute_container *cont,
177 struct Scsi_Host *shost;
178 struct sas_internal *i;
180 if (!scsi_is_host_device(dev))
182 shost = dev_to_shost(dev);
184 if (!shost->transportt)
186 if (shost->transportt->host_attrs.ac.class !=
187 &sas_host_class.class)
190 i = to_sas_internal(shost->transportt);
191 return &i->t.host_attrs.ac == cont;
194 static int do_sas_phy_delete(struct device *dev, void *data)
196 if (scsi_is_sas_phy(dev))
197 sas_phy_delete(dev_to_phy(dev));
202 * sas_remove_host -- tear down a Scsi_Host's SAS data structures
203 * @shost: Scsi Host that is torn down
205 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
206 * Must be called just before scsi_remove_host for SAS HBAs.
208 void sas_remove_host(struct Scsi_Host *shost)
210 device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
212 EXPORT_SYMBOL(sas_remove_host);
216 * SAS Port attributes
219 #define sas_phy_show_simple(field, name, format_string, cast) \
221 show_sas_phy_##name(struct class_device *cdev, char *buf) \
223 struct sas_phy *phy = transport_class_to_phy(cdev); \
225 return snprintf(buf, 20, format_string, cast phy->field); \
228 #define sas_phy_simple_attr(field, name, format_string, type) \
229 sas_phy_show_simple(field, name, format_string, (type)) \
230 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
232 #define sas_phy_show_protocol(field, name) \
234 show_sas_phy_##name(struct class_device *cdev, char *buf) \
236 struct sas_phy *phy = transport_class_to_phy(cdev); \
239 return snprintf(buf, 20, "none\n"); \
240 return get_sas_protocol_names(phy->field, buf); \
243 #define sas_phy_protocol_attr(field, name) \
244 sas_phy_show_protocol(field, name) \
245 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
247 #define sas_phy_show_linkspeed(field) \
249 show_sas_phy_##field(struct class_device *cdev, char *buf) \
251 struct sas_phy *phy = transport_class_to_phy(cdev); \
253 return get_sas_linkspeed_names(phy->field, buf); \
256 #define sas_phy_linkspeed_attr(field) \
257 sas_phy_show_linkspeed(field) \
258 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
261 show_sas_device_type(struct class_device *cdev, char *buf)
263 struct sas_phy *phy = transport_class_to_phy(cdev);
265 if (!phy->identify.device_type)
266 return snprintf(buf, 20, "none\n");
267 return get_sas_device_type_names(phy->identify.device_type, buf);
270 static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
272 sas_phy_protocol_attr(identify.initiator_port_protocols,
273 initiator_port_protocols);
274 sas_phy_protocol_attr(identify.target_port_protocols,
275 target_port_protocols);
276 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
278 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
279 sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
280 sas_phy_linkspeed_attr(negotiated_linkrate);
281 sas_phy_linkspeed_attr(minimum_linkrate_hw);
282 sas_phy_linkspeed_attr(minimum_linkrate);
283 sas_phy_linkspeed_attr(maximum_linkrate_hw);
284 sas_phy_linkspeed_attr(maximum_linkrate);
287 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
288 "sas_phy", NULL, NULL, NULL);
290 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
292 struct Scsi_Host *shost;
293 struct sas_internal *i;
295 if (!scsi_is_sas_phy(dev))
297 shost = dev_to_shost(dev->parent);
299 if (!shost->transportt)
301 if (shost->transportt->host_attrs.ac.class !=
302 &sas_host_class.class)
305 i = to_sas_internal(shost->transportt);
306 return &i->phy_attr_cont.ac == cont;
309 static void sas_phy_release(struct device *dev)
311 struct sas_phy *phy = dev_to_phy(dev);
313 put_device(dev->parent);
318 * sas_phy_alloc -- allocates and initialize a SAS PHY structure
319 * @parent: Parent device
320 * @number: Port number
322 * Allocates an SAS PHY structure. It will be added in the device tree
323 * below the device specified by @parent, which has to be either a Scsi_Host
327 * SAS PHY allocated or %NULL if the allocation failed.
329 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
331 struct Scsi_Host *shost = dev_to_shost(parent);
334 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
337 memset(phy, 0, sizeof(*phy));
341 phy->number = number;
343 device_initialize(&phy->dev);
344 phy->dev.parent = get_device(parent);
345 phy->dev.release = sas_phy_release;
346 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
348 transport_setup_device(&phy->dev);
352 EXPORT_SYMBOL(sas_phy_alloc);
355 * sas_phy_add -- add a SAS PHY to the device hierachy
356 * @phy: The PHY to be added
358 * Publishes a SAS PHY to the rest of the system.
360 int sas_phy_add(struct sas_phy *phy)
364 error = device_add(&phy->dev);
366 transport_add_device(&phy->dev);
367 transport_configure_device(&phy->dev);
372 EXPORT_SYMBOL(sas_phy_add);
375 * sas_phy_free -- free a SAS PHY
376 * @phy: SAS PHY to free
378 * Frees the specified SAS PHY.
381 * This function must only be called on a PHY that has not
382 * sucessfully been added using sas_phy_add().
384 void sas_phy_free(struct sas_phy *phy)
386 transport_destroy_device(&phy->dev);
387 put_device(phy->dev.parent);
388 put_device(phy->dev.parent);
389 put_device(phy->dev.parent);
392 EXPORT_SYMBOL(sas_phy_free);
395 * sas_phy_delete -- remove SAS PHY
396 * @phy: SAS PHY to remove
398 * Removes the specified SAS PHY. If the SAS PHY has an
399 * associated remote PHY it is removed before.
402 sas_phy_delete(struct sas_phy *phy)
404 struct device *dev = &phy->dev;
407 sas_rphy_delete(phy->rphy);
409 transport_remove_device(dev);
411 transport_destroy_device(dev);
412 put_device(dev->parent);
414 EXPORT_SYMBOL(sas_phy_delete);
417 * scsi_is_sas_phy -- check if a struct device represents a SAS PHY
418 * @dev: device to check
421 * %1 if the device represents a SAS PHY, %0 else
423 int scsi_is_sas_phy(const struct device *dev)
425 return dev->release == sas_phy_release;
427 EXPORT_SYMBOL(scsi_is_sas_phy);
430 * SAS remote PHY attributes.
433 #define sas_rphy_show_simple(field, name, format_string, cast) \
435 show_sas_rphy_##name(struct class_device *cdev, char *buf) \
437 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
439 return snprintf(buf, 20, format_string, cast rphy->field); \
442 #define sas_rphy_simple_attr(field, name, format_string, type) \
443 sas_rphy_show_simple(field, name, format_string, (type)) \
444 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
445 show_sas_rphy_##name, NULL)
447 #define sas_rphy_show_protocol(field, name) \
449 show_sas_rphy_##name(struct class_device *cdev, char *buf) \
451 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
454 return snprintf(buf, 20, "none\n"); \
455 return get_sas_protocol_names(rphy->field, buf); \
458 #define sas_rphy_protocol_attr(field, name) \
459 sas_rphy_show_protocol(field, name) \
460 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
461 show_sas_rphy_##name, NULL)
464 show_sas_rphy_device_type(struct class_device *cdev, char *buf)
466 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
468 if (!rphy->identify.device_type)
469 return snprintf(buf, 20, "none\n");
470 return get_sas_device_type_names(
471 rphy->identify.device_type, buf);
474 static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
475 show_sas_rphy_device_type, NULL);
477 sas_rphy_protocol_attr(identify.initiator_port_protocols,
478 initiator_port_protocols);
479 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
480 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
482 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
484 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
485 "sas_rphy", NULL, NULL, NULL);
487 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
489 struct Scsi_Host *shost;
490 struct sas_internal *i;
492 if (!scsi_is_sas_rphy(dev))
494 shost = dev_to_shost(dev->parent->parent);
496 if (!shost->transportt)
498 if (shost->transportt->host_attrs.ac.class !=
499 &sas_host_class.class)
502 i = to_sas_internal(shost->transportt);
503 return &i->rphy_attr_cont.ac == cont;
506 static void sas_rphy_release(struct device *dev)
508 struct sas_rphy *rphy = dev_to_rphy(dev);
510 put_device(dev->parent);
515 * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure
516 * @parent: SAS PHY this remote PHY is conneted to
518 * Allocates an SAS remote PHY structure, connected to @parent.
521 * SAS PHY allocated or %NULL if the allocation failed.
523 struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent)
525 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
526 struct sas_rphy *rphy;
528 rphy = kmalloc(sizeof(*rphy), GFP_KERNEL);
530 put_device(&parent->dev);
533 memset(rphy, 0, sizeof(*rphy));
535 device_initialize(&rphy->dev);
536 rphy->dev.parent = get_device(&parent->dev);
537 rphy->dev.release = sas_rphy_release;
538 sprintf(rphy->dev.bus_id, "rphy-%d:%d",
539 shost->host_no, parent->number);
540 transport_setup_device(&rphy->dev);
544 EXPORT_SYMBOL(sas_rphy_alloc);
547 * sas_rphy_add -- add a SAS remote PHY to the device hierachy
548 * @rphy: The remote PHY to be added
550 * Publishes a SAS remote PHY to the rest of the system.
552 int sas_rphy_add(struct sas_rphy *rphy)
554 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
555 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
556 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
557 struct sas_identify *identify = &rphy->identify;
564 error = device_add(&rphy->dev);
567 transport_add_device(&rphy->dev);
568 transport_configure_device(&rphy->dev);
570 spin_lock(&sas_host->lock);
571 list_add_tail(&rphy->list, &sas_host->rphy_list);
572 if (identify->device_type == SAS_END_DEVICE &&
573 (identify->target_port_protocols &
574 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
575 rphy->scsi_target_id = sas_host->next_target_id++;
577 rphy->scsi_target_id = -1;
578 spin_unlock(&sas_host->lock);
580 if (rphy->scsi_target_id != -1) {
581 scsi_scan_target(&rphy->dev, parent->number,
582 rphy->scsi_target_id, ~0, 0);
587 EXPORT_SYMBOL(sas_rphy_add);
590 * sas_rphy_free -- free a SAS remote PHY
591 * @rphy SAS remote PHY to free
593 * Frees the specified SAS remote PHY.
596 * This function must only be called on a remote
597 * PHY that has not sucessfully been added using
600 void sas_rphy_free(struct sas_rphy *rphy)
602 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
603 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
605 spin_lock(&sas_host->lock);
606 list_del(&rphy->list);
607 spin_unlock(&sas_host->lock);
609 transport_destroy_device(&rphy->dev);
610 put_device(rphy->dev.parent);
611 put_device(rphy->dev.parent);
612 put_device(rphy->dev.parent);
615 EXPORT_SYMBOL(sas_rphy_free);
618 * sas_rphy_delete -- remove SAS remote PHY
619 * @rphy: SAS remote PHY to remove
621 * Removes the specified SAS remote PHY.
624 sas_rphy_delete(struct sas_rphy *rphy)
626 struct device *dev = &rphy->dev;
627 struct sas_phy *parent = dev_to_phy(dev->parent);
628 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
629 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
631 scsi_remove_target(dev);
633 transport_remove_device(dev);
635 transport_destroy_device(dev);
637 spin_lock(&sas_host->lock);
638 list_del(&rphy->list);
639 spin_unlock(&sas_host->lock);
641 put_device(&parent->dev);
643 EXPORT_SYMBOL(sas_rphy_delete);
646 * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
647 * @dev: device to check
650 * %1 if the device represents a SAS remote PHY, %0 else
652 int scsi_is_sas_rphy(const struct device *dev)
654 return dev->release == sas_rphy_release;
656 EXPORT_SYMBOL(scsi_is_sas_rphy);
663 static struct device *sas_target_parent(struct Scsi_Host *shost,
664 int channel, uint id)
666 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
667 struct sas_rphy *rphy;
668 struct device *dev = NULL;
670 spin_lock(&sas_host->lock);
671 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
672 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
673 if (parent->number == channel &&
674 rphy->scsi_target_id == id)
677 spin_unlock(&sas_host->lock);
684 * Setup / Teardown code
687 #define SETUP_RPORT_ATTRIBUTE(field) \
688 i->private_rphy_attrs[count] = class_device_attr_##field; \
689 i->private_rphy_attrs[count].attr.mode = S_IRUGO; \
690 i->private_rphy_attrs[count].store = NULL; \
691 i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \
694 #define SETUP_PORT_ATTRIBUTE(field) \
695 i->private_phy_attrs[count] = class_device_attr_##field; \
696 i->private_phy_attrs[count].attr.mode = S_IRUGO; \
697 i->private_phy_attrs[count].store = NULL; \
698 i->phy_attrs[count] = &i->private_phy_attrs[count]; \
703 * sas_attach_transport -- instantiate SAS transport template
704 * @ft: SAS transport class function template
706 struct scsi_transport_template *
707 sas_attach_transport(struct sas_function_template *ft)
709 struct sas_internal *i;
712 i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL);
715 memset(i, 0, sizeof(struct sas_internal));
717 i->t.target_parent = sas_target_parent;
719 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
720 i->t.host_attrs.ac.class = &sas_host_class.class;
721 i->t.host_attrs.ac.match = sas_host_match;
722 transport_container_register(&i->t.host_attrs);
723 i->t.host_size = sizeof(struct sas_host_attrs);
725 i->phy_attr_cont.ac.class = &sas_phy_class.class;
726 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
727 i->phy_attr_cont.ac.match = sas_phy_match;
728 transport_container_register(&i->phy_attr_cont);
730 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
731 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
732 i->rphy_attr_cont.ac.match = sas_rphy_match;
733 transport_container_register(&i->rphy_attr_cont);
738 i->host_attrs[count] = NULL;
741 SETUP_PORT_ATTRIBUTE(initiator_port_protocols);
742 SETUP_PORT_ATTRIBUTE(target_port_protocols);
743 SETUP_PORT_ATTRIBUTE(device_type);
744 SETUP_PORT_ATTRIBUTE(sas_address);
745 SETUP_PORT_ATTRIBUTE(phy_identifier);
746 SETUP_PORT_ATTRIBUTE(port_identifier);
747 SETUP_PORT_ATTRIBUTE(negotiated_linkrate);
748 SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw);
749 SETUP_PORT_ATTRIBUTE(minimum_linkrate);
750 SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);
751 SETUP_PORT_ATTRIBUTE(maximum_linkrate);
752 i->phy_attrs[count] = NULL;
755 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
756 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
757 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
758 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
759 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
760 i->rphy_attrs[count] = NULL;
764 EXPORT_SYMBOL(sas_attach_transport);
767 * sas_release_transport -- release SAS transport template instance
768 * @t: transport template instance
770 void sas_release_transport(struct scsi_transport_template *t)
772 struct sas_internal *i = to_sas_internal(t);
774 transport_container_unregister(&i->t.host_attrs);
775 transport_container_unregister(&i->phy_attr_cont);
776 transport_container_unregister(&i->rphy_attr_cont);
780 EXPORT_SYMBOL(sas_release_transport);
782 static __init int sas_transport_init(void)
786 error = transport_class_register(&sas_host_class);
789 error = transport_class_register(&sas_phy_class);
791 goto out_unregister_transport;
792 error = transport_class_register(&sas_rphy_class);
794 goto out_unregister_phy;
799 transport_class_unregister(&sas_phy_class);
800 out_unregister_transport:
801 transport_class_unregister(&sas_host_class);
807 static void __exit sas_transport_exit(void)
809 transport_class_unregister(&sas_host_class);
810 transport_class_unregister(&sas_phy_class);
811 transport_class_unregister(&sas_rphy_class);
814 MODULE_AUTHOR("Christoph Hellwig");
815 MODULE_DESCRIPTION("SAS Transphy Attributes");
816 MODULE_LICENSE("GPL");
818 module_init(sas_transport_init);
819 module_exit(sas_transport_exit);