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 device *dev)
161 struct Scsi_Host *shost = dev_to_shost(dev);
162 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
164 INIT_LIST_HEAD(&sas_host->rphy_list);
165 spin_lock_init(&sas_host->lock);
166 sas_host->next_target_id = 0;
170 static DECLARE_TRANSPORT_CLASS(sas_host_class,
171 "sas_host", sas_host_setup, NULL, NULL);
173 static int sas_host_match(struct attribute_container *cont,
176 struct Scsi_Host *shost;
177 struct sas_internal *i;
179 if (!scsi_is_host_device(dev))
181 shost = dev_to_shost(dev);
183 if (!shost->transportt)
185 if (shost->transportt->host_attrs.ac.class !=
186 &sas_host_class.class)
189 i = to_sas_internal(shost->transportt);
190 return &i->t.host_attrs.ac == cont;
193 static int do_sas_phy_delete(struct device *dev, void *data)
195 if (scsi_is_sas_phy(dev))
196 sas_phy_delete(dev_to_phy(dev));
201 * sas_remove_host -- tear down a Scsi_Host's SAS data structures
202 * @shost: Scsi Host that is torn down
204 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
205 * Must be called just before scsi_remove_host for SAS HBAs.
207 void sas_remove_host(struct Scsi_Host *shost)
209 device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
211 EXPORT_SYMBOL(sas_remove_host);
215 * SAS Port attributes
218 #define sas_phy_show_simple(field, name, format_string, cast) \
220 show_sas_phy_##name(struct class_device *cdev, char *buf) \
222 struct sas_phy *phy = transport_class_to_phy(cdev); \
224 return snprintf(buf, 20, format_string, cast phy->field); \
227 #define sas_phy_simple_attr(field, name, format_string, type) \
228 sas_phy_show_simple(field, name, format_string, (type)) \
229 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
231 #define sas_phy_show_protocol(field, name) \
233 show_sas_phy_##name(struct class_device *cdev, char *buf) \
235 struct sas_phy *phy = transport_class_to_phy(cdev); \
238 return snprintf(buf, 20, "none\n"); \
239 return get_sas_protocol_names(phy->field, buf); \
242 #define sas_phy_protocol_attr(field, name) \
243 sas_phy_show_protocol(field, name) \
244 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
246 #define sas_phy_show_linkspeed(field) \
248 show_sas_phy_##field(struct class_device *cdev, char *buf) \
250 struct sas_phy *phy = transport_class_to_phy(cdev); \
252 return get_sas_linkspeed_names(phy->field, buf); \
255 #define sas_phy_linkspeed_attr(field) \
256 sas_phy_show_linkspeed(field) \
257 static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
260 show_sas_device_type(struct class_device *cdev, char *buf)
262 struct sas_phy *phy = transport_class_to_phy(cdev);
264 if (!phy->identify.device_type)
265 return snprintf(buf, 20, "none\n");
266 return get_sas_device_type_names(phy->identify.device_type, buf);
269 static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
271 sas_phy_protocol_attr(identify.initiator_port_protocols,
272 initiator_port_protocols);
273 sas_phy_protocol_attr(identify.target_port_protocols,
274 target_port_protocols);
275 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
277 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
278 sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
279 sas_phy_linkspeed_attr(negotiated_linkrate);
280 sas_phy_linkspeed_attr(minimum_linkrate_hw);
281 sas_phy_linkspeed_attr(minimum_linkrate);
282 sas_phy_linkspeed_attr(maximum_linkrate_hw);
283 sas_phy_linkspeed_attr(maximum_linkrate);
286 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
287 "sas_phy", NULL, NULL, NULL);
289 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
291 struct Scsi_Host *shost;
292 struct sas_internal *i;
294 if (!scsi_is_sas_phy(dev))
296 shost = dev_to_shost(dev->parent);
298 if (!shost->transportt)
300 if (shost->transportt->host_attrs.ac.class !=
301 &sas_host_class.class)
304 i = to_sas_internal(shost->transportt);
305 return &i->phy_attr_cont.ac == cont;
308 static void sas_phy_release(struct device *dev)
310 struct sas_phy *phy = dev_to_phy(dev);
312 put_device(dev->parent);
317 * sas_phy_alloc -- allocates and initialize a SAS PHY structure
318 * @parent: Parent device
319 * @number: Port number
321 * Allocates an SAS PHY structure. It will be added in the device tree
322 * below the device specified by @parent, which has to be either a Scsi_Host
326 * SAS PHY allocated or %NULL if the allocation failed.
328 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
330 struct Scsi_Host *shost = dev_to_shost(parent);
333 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
336 memset(phy, 0, sizeof(*phy));
340 phy->number = number;
342 device_initialize(&phy->dev);
343 phy->dev.parent = get_device(parent);
344 phy->dev.release = sas_phy_release;
345 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
347 transport_setup_device(&phy->dev);
351 EXPORT_SYMBOL(sas_phy_alloc);
354 * sas_phy_add -- add a SAS PHY to the device hierachy
355 * @phy: The PHY to be added
357 * Publishes a SAS PHY to the rest of the system.
359 int sas_phy_add(struct sas_phy *phy)
363 error = device_add(&phy->dev);
365 transport_add_device(&phy->dev);
366 transport_configure_device(&phy->dev);
371 EXPORT_SYMBOL(sas_phy_add);
374 * sas_phy_free -- free a SAS PHY
375 * @phy: SAS PHY to free
377 * Frees the specified SAS PHY.
380 * This function must only be called on a PHY that has not
381 * sucessfully been added using sas_phy_add().
383 void sas_phy_free(struct sas_phy *phy)
385 transport_destroy_device(&phy->dev);
386 put_device(phy->dev.parent);
387 put_device(phy->dev.parent);
388 put_device(phy->dev.parent);
391 EXPORT_SYMBOL(sas_phy_free);
394 * sas_phy_delete -- remove SAS PHY
395 * @phy: SAS PHY to remove
397 * Removes the specified SAS PHY. If the SAS PHY has an
398 * associated remote PHY it is removed before.
401 sas_phy_delete(struct sas_phy *phy)
403 struct device *dev = &phy->dev;
406 sas_rphy_delete(phy->rphy);
408 transport_remove_device(dev);
410 transport_destroy_device(dev);
411 put_device(dev->parent);
413 EXPORT_SYMBOL(sas_phy_delete);
416 * scsi_is_sas_phy -- check if a struct device represents a SAS PHY
417 * @dev: device to check
420 * %1 if the device represents a SAS PHY, %0 else
422 int scsi_is_sas_phy(const struct device *dev)
424 return dev->release == sas_phy_release;
426 EXPORT_SYMBOL(scsi_is_sas_phy);
429 * SAS remote PHY attributes.
432 #define sas_rphy_show_simple(field, name, format_string, cast) \
434 show_sas_rphy_##name(struct class_device *cdev, char *buf) \
436 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
438 return snprintf(buf, 20, format_string, cast rphy->field); \
441 #define sas_rphy_simple_attr(field, name, format_string, type) \
442 sas_rphy_show_simple(field, name, format_string, (type)) \
443 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
444 show_sas_rphy_##name, NULL)
446 #define sas_rphy_show_protocol(field, name) \
448 show_sas_rphy_##name(struct class_device *cdev, char *buf) \
450 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
453 return snprintf(buf, 20, "none\n"); \
454 return get_sas_protocol_names(rphy->field, buf); \
457 #define sas_rphy_protocol_attr(field, name) \
458 sas_rphy_show_protocol(field, name) \
459 static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
460 show_sas_rphy_##name, NULL)
463 show_sas_rphy_device_type(struct class_device *cdev, char *buf)
465 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
467 if (!rphy->identify.device_type)
468 return snprintf(buf, 20, "none\n");
469 return get_sas_device_type_names(
470 rphy->identify.device_type, buf);
473 static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
474 show_sas_rphy_device_type, NULL);
476 sas_rphy_protocol_attr(identify.initiator_port_protocols,
477 initiator_port_protocols);
478 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
479 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
481 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
483 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
484 "sas_rphy", NULL, NULL, NULL);
486 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
488 struct Scsi_Host *shost;
489 struct sas_internal *i;
491 if (!scsi_is_sas_rphy(dev))
493 shost = dev_to_shost(dev->parent->parent);
495 if (!shost->transportt)
497 if (shost->transportt->host_attrs.ac.class !=
498 &sas_host_class.class)
501 i = to_sas_internal(shost->transportt);
502 return &i->rphy_attr_cont.ac == cont;
505 static void sas_rphy_release(struct device *dev)
507 struct sas_rphy *rphy = dev_to_rphy(dev);
509 put_device(dev->parent);
514 * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure
515 * @parent: SAS PHY this remote PHY is conneted to
517 * Allocates an SAS remote PHY structure, connected to @parent.
520 * SAS PHY allocated or %NULL if the allocation failed.
522 struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent)
524 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
525 struct sas_rphy *rphy;
527 rphy = kmalloc(sizeof(*rphy), GFP_KERNEL);
529 put_device(&parent->dev);
532 memset(rphy, 0, sizeof(*rphy));
534 device_initialize(&rphy->dev);
535 rphy->dev.parent = get_device(&parent->dev);
536 rphy->dev.release = sas_rphy_release;
537 sprintf(rphy->dev.bus_id, "rphy-%d:%d",
538 shost->host_no, parent->number);
539 transport_setup_device(&rphy->dev);
543 EXPORT_SYMBOL(sas_rphy_alloc);
546 * sas_rphy_add -- add a SAS remote PHY to the device hierachy
547 * @rphy: The remote PHY to be added
549 * Publishes a SAS remote PHY to the rest of the system.
551 int sas_rphy_add(struct sas_rphy *rphy)
553 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
554 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
555 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
556 struct sas_identify *identify = &rphy->identify;
563 error = device_add(&rphy->dev);
566 transport_add_device(&rphy->dev);
567 transport_configure_device(&rphy->dev);
569 spin_lock(&sas_host->lock);
570 list_add_tail(&rphy->list, &sas_host->rphy_list);
571 if (identify->device_type == SAS_END_DEVICE &&
572 (identify->target_port_protocols &
573 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
574 rphy->scsi_target_id = sas_host->next_target_id++;
576 rphy->scsi_target_id = -1;
577 spin_unlock(&sas_host->lock);
579 if (rphy->scsi_target_id != -1) {
580 scsi_scan_target(&rphy->dev, parent->number,
581 rphy->scsi_target_id, ~0, 0);
586 EXPORT_SYMBOL(sas_rphy_add);
589 * sas_rphy_free -- free a SAS remote PHY
590 * @rphy SAS remote PHY to free
592 * Frees the specified SAS remote PHY.
595 * This function must only be called on a remote
596 * PHY that has not sucessfully been added using
599 void sas_rphy_free(struct sas_rphy *rphy)
601 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
602 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
604 spin_lock(&sas_host->lock);
605 list_del(&rphy->list);
606 spin_unlock(&sas_host->lock);
608 transport_destroy_device(&rphy->dev);
609 put_device(rphy->dev.parent);
610 put_device(rphy->dev.parent);
611 put_device(rphy->dev.parent);
614 EXPORT_SYMBOL(sas_rphy_free);
617 * sas_rphy_delete -- remove SAS remote PHY
618 * @rphy: SAS remote PHY to remove
620 * Removes the specified SAS remote PHY.
623 sas_rphy_delete(struct sas_rphy *rphy)
625 struct device *dev = &rphy->dev;
626 struct sas_phy *parent = dev_to_phy(dev->parent);
627 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
628 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
630 transport_destroy_device(&rphy->dev);
632 scsi_remove_target(&rphy->dev);
634 spin_lock(&sas_host->lock);
635 list_del(&rphy->list);
636 spin_unlock(&sas_host->lock);
638 transport_remove_device(dev);
640 transport_destroy_device(dev);
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);