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_request.h>
37 #include <scsi/scsi_device.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_transport.h>
40 #include <scsi/scsi_transport_sas.h>
42 #include "scsi_sas_internal.h"
43 struct sas_host_attrs {
44 struct list_head rphy_list;
46 struct request_queue *q;
51 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
55 * Hack to allow attributes of the same name in different objects.
57 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
58 struct device_attribute dev_attr_##_prefix##_##_name = \
59 __ATTR(_name,_mode,_show,_store)
63 * Pretty printing helpers
66 #define sas_bitfield_name_match(title, table) \
68 get_sas_##title##_names(u32 table_key, char *buf) \
74 for (i = 0; i < ARRAY_SIZE(table); i++) { \
75 if (table[i].value & table_key) { \
76 len += sprintf(buf + len, "%s%s", \
77 prefix, table[i].name); \
81 len += sprintf(buf + len, "\n"); \
85 #define sas_bitfield_name_set(title, table) \
87 set_sas_##title##_names(u32 *table_key, const char *buf) \
92 for (i = 0; i < ARRAY_SIZE(table); i++) { \
93 len = strlen(table[i].name); \
94 if (strncmp(buf, table[i].name, len) == 0 && \
95 (buf[len] == '\n' || buf[len] == '\0')) { \
96 *table_key = table[i].value; \
103 #define sas_bitfield_name_search(title, table) \
105 get_sas_##title##_names(u32 table_key, char *buf) \
110 for (i = 0; i < ARRAY_SIZE(table); i++) { \
111 if (table[i].value == table_key) { \
112 len += sprintf(buf + len, "%s", \
117 len += sprintf(buf + len, "\n"); \
124 } sas_device_type_names[] = {
125 { SAS_PHY_UNUSED, "unused" },
126 { SAS_END_DEVICE, "end device" },
127 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
128 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
130 sas_bitfield_name_search(device_type, sas_device_type_names)
136 } sas_protocol_names[] = {
137 { SAS_PROTOCOL_SATA, "sata" },
138 { SAS_PROTOCOL_SMP, "smp" },
139 { SAS_PROTOCOL_STP, "stp" },
140 { SAS_PROTOCOL_SSP, "ssp" },
142 sas_bitfield_name_match(protocol, sas_protocol_names)
147 } sas_linkspeed_names[] = {
148 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
149 { SAS_PHY_DISABLED, "Phy disabled" },
150 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
151 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
152 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
153 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
154 { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
155 { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
157 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
158 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
160 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
162 struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
163 struct sas_end_device *rdev;
165 BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
167 rdev = rphy_to_end_device(rphy);
171 static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
172 struct sas_rphy *rphy)
176 int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
178 while ((req = blk_fetch_request(q)) != NULL) {
179 spin_unlock_irq(q->queue_lock);
181 scsi_req(req)->resid_len = blk_rq_bytes(req);
183 scsi_req(req->next_rq)->resid_len =
184 blk_rq_bytes(req->next_rq);
185 handler = to_sas_internal(shost->transportt)->f->smp_handler;
186 ret = handler(shost, rphy, req);
187 scsi_req(req)->result = ret;
189 blk_end_request_all(req, 0);
191 spin_lock_irq(q->queue_lock);
195 static void sas_host_smp_request(struct request_queue *q)
197 sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
200 static void sas_non_host_smp_request(struct request_queue *q)
202 struct sas_rphy *rphy = q->queuedata;
203 sas_smp_request(q, rphy_to_shost(rphy), rphy);
206 static void sas_host_release(struct device *dev)
208 struct Scsi_Host *shost = dev_to_shost(dev);
209 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
210 struct request_queue *q = sas_host->q;
213 blk_cleanup_queue(q);
216 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
218 struct request_queue *q;
223 void (*release)(struct device *);
225 if (!to_sas_internal(shost->transportt)->f->smp_handler) {
226 printk("%s can't handle SMP requests\n", shost->hostt->name);
230 q = blk_alloc_queue(GFP_KERNEL);
233 q->cmd_size = sizeof(struct scsi_request);
236 q->request_fn = sas_non_host_smp_request;
238 name = dev_name(dev);
241 q->request_fn = sas_host_smp_request;
242 dev = &shost->shost_gendev;
243 snprintf(namebuf, sizeof(namebuf),
244 "sas_host%d", shost->host_no);
246 release = sas_host_release;
248 error = blk_init_allocated_queue(q);
250 goto out_cleanup_queue;
252 error = bsg_register_queue(q, dev, name, release);
254 goto out_cleanup_queue;
259 to_sas_host_attrs(shost)->q = q;
264 q->queuedata = shost;
266 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
270 blk_cleanup_queue(q);
274 static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
276 struct request_queue *q;
281 q = to_sas_host_attrs(shost)->q;
286 bsg_unregister_queue(q);
290 * SAS host attributes
293 static int sas_host_setup(struct transport_container *tc, struct device *dev,
296 struct Scsi_Host *shost = dev_to_shost(dev);
297 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
299 INIT_LIST_HEAD(&sas_host->rphy_list);
300 mutex_init(&sas_host->lock);
301 sas_host->next_target_id = 0;
302 sas_host->next_expander_id = 0;
303 sas_host->next_port_id = 0;
305 if (sas_bsg_initialize(shost, NULL))
306 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
312 static int sas_host_remove(struct transport_container *tc, struct device *dev,
315 struct Scsi_Host *shost = dev_to_shost(dev);
317 sas_bsg_remove(shost, NULL);
322 static DECLARE_TRANSPORT_CLASS(sas_host_class,
323 "sas_host", sas_host_setup, sas_host_remove, NULL);
325 static int sas_host_match(struct attribute_container *cont,
328 struct Scsi_Host *shost;
329 struct sas_internal *i;
331 if (!scsi_is_host_device(dev))
333 shost = dev_to_shost(dev);
335 if (!shost->transportt)
337 if (shost->transportt->host_attrs.ac.class !=
338 &sas_host_class.class)
341 i = to_sas_internal(shost->transportt);
342 return &i->t.host_attrs.ac == cont;
345 static int do_sas_phy_delete(struct device *dev, void *data)
347 int pass = (int)(unsigned long)data;
349 if (pass == 0 && scsi_is_sas_port(dev))
350 sas_port_delete(dev_to_sas_port(dev));
351 else if (pass == 1 && scsi_is_sas_phy(dev))
352 sas_phy_delete(dev_to_phy(dev));
357 * sas_remove_children - tear down a devices SAS data structures
358 * @dev: device belonging to the sas object
360 * Removes all SAS PHYs and remote PHYs for a given object
362 void sas_remove_children(struct device *dev)
364 device_for_each_child(dev, (void *)0, do_sas_phy_delete);
365 device_for_each_child(dev, (void *)1, do_sas_phy_delete);
367 EXPORT_SYMBOL(sas_remove_children);
370 * sas_remove_host - tear down a Scsi_Host's SAS data structures
371 * @shost: Scsi Host that is torn down
373 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
376 * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
379 void sas_remove_host(struct Scsi_Host *shost)
381 sas_remove_children(&shost->shost_gendev);
382 scsi_remove_host(shost);
384 EXPORT_SYMBOL(sas_remove_host);
387 * sas_get_address - return the SAS address of the device
390 * Returns the SAS address of the scsi device
392 u64 sas_get_address(struct scsi_device *sdev)
394 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
396 return rdev->rphy.identify.sas_address;
398 EXPORT_SYMBOL(sas_get_address);
401 * sas_tlr_supported - checking TLR bit in vpd 0x90
402 * @sdev: scsi device struct
404 * Check Transport Layer Retries are supported or not.
405 * If vpd page 0x90 is present, TRL is supported.
409 sas_tlr_supported(struct scsi_device *sdev)
411 const int vpd_len = 32;
412 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
413 char *buffer = kzalloc(vpd_len, GFP_KERNEL);
416 if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
420 * Magic numbers: the VPD Protocol page (0x90)
421 * has a 4 byte header and then one entry per device port
422 * the TLR bit is at offset 8 on each port entry
423 * if we take the first port, that's at total offset 12
425 ret = buffer[12] & 0x01;
429 rdev->tlr_supported = ret;
433 EXPORT_SYMBOL_GPL(sas_tlr_supported);
436 * sas_disable_tlr - setting TLR flags
437 * @sdev: scsi device struct
439 * Seting tlr_enabled flag to 0.
443 sas_disable_tlr(struct scsi_device *sdev)
445 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
447 rdev->tlr_enabled = 0;
449 EXPORT_SYMBOL_GPL(sas_disable_tlr);
452 * sas_enable_tlr - setting TLR flags
453 * @sdev: scsi device struct
455 * Seting tlr_enabled flag 1.
458 void sas_enable_tlr(struct scsi_device *sdev)
460 unsigned int tlr_supported = 0;
461 tlr_supported = sas_tlr_supported(sdev);
464 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
466 rdev->tlr_enabled = 1;
471 EXPORT_SYMBOL_GPL(sas_enable_tlr);
473 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
475 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
476 return rdev->tlr_enabled;
478 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
484 #define sas_phy_show_simple(field, name, format_string, cast) \
486 show_sas_phy_##name(struct device *dev, \
487 struct device_attribute *attr, char *buf) \
489 struct sas_phy *phy = transport_class_to_phy(dev); \
491 return snprintf(buf, 20, format_string, cast phy->field); \
494 #define sas_phy_simple_attr(field, name, format_string, type) \
495 sas_phy_show_simple(field, name, format_string, (type)) \
496 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
498 #define sas_phy_show_protocol(field, name) \
500 show_sas_phy_##name(struct device *dev, \
501 struct device_attribute *attr, char *buf) \
503 struct sas_phy *phy = transport_class_to_phy(dev); \
506 return snprintf(buf, 20, "none\n"); \
507 return get_sas_protocol_names(phy->field, buf); \
510 #define sas_phy_protocol_attr(field, name) \
511 sas_phy_show_protocol(field, name) \
512 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
514 #define sas_phy_show_linkspeed(field) \
516 show_sas_phy_##field(struct device *dev, \
517 struct device_attribute *attr, char *buf) \
519 struct sas_phy *phy = transport_class_to_phy(dev); \
521 return get_sas_linkspeed_names(phy->field, buf); \
524 /* Fudge to tell if we're minimum or maximum */
525 #define sas_phy_store_linkspeed(field) \
527 store_sas_phy_##field(struct device *dev, \
528 struct device_attribute *attr, \
529 const char *buf, size_t count) \
531 struct sas_phy *phy = transport_class_to_phy(dev); \
532 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
533 struct sas_internal *i = to_sas_internal(shost->transportt); \
535 struct sas_phy_linkrates rates = {0}; \
538 error = set_sas_linkspeed_names(&value, buf); \
541 rates.field = value; \
542 error = i->f->set_phy_speed(phy, &rates); \
544 return error ? error : count; \
547 #define sas_phy_linkspeed_rw_attr(field) \
548 sas_phy_show_linkspeed(field) \
549 sas_phy_store_linkspeed(field) \
550 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
551 store_sas_phy_##field)
553 #define sas_phy_linkspeed_attr(field) \
554 sas_phy_show_linkspeed(field) \
555 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
558 #define sas_phy_show_linkerror(field) \
560 show_sas_phy_##field(struct device *dev, \
561 struct device_attribute *attr, char *buf) \
563 struct sas_phy *phy = transport_class_to_phy(dev); \
564 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
565 struct sas_internal *i = to_sas_internal(shost->transportt); \
568 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
571 return snprintf(buf, 20, "%u\n", phy->field); \
574 #define sas_phy_linkerror_attr(field) \
575 sas_phy_show_linkerror(field) \
576 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
580 show_sas_device_type(struct device *dev,
581 struct device_attribute *attr, char *buf)
583 struct sas_phy *phy = transport_class_to_phy(dev);
585 if (!phy->identify.device_type)
586 return snprintf(buf, 20, "none\n");
587 return get_sas_device_type_names(phy->identify.device_type, buf);
589 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
591 static ssize_t do_sas_phy_enable(struct device *dev,
592 size_t count, int enable)
594 struct sas_phy *phy = transport_class_to_phy(dev);
595 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
596 struct sas_internal *i = to_sas_internal(shost->transportt);
599 error = i->f->phy_enable(phy, enable);
602 phy->enabled = enable;
607 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
608 const char *buf, size_t count)
615 do_sas_phy_enable(dev, count, 0);
618 do_sas_phy_enable(dev, count, 1);
628 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
631 struct sas_phy *phy = transport_class_to_phy(dev);
633 return snprintf(buf, 20, "%d", phy->enabled);
636 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
637 store_sas_phy_enable);
640 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
642 struct sas_phy *phy = transport_class_to_phy(dev);
643 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
644 struct sas_internal *i = to_sas_internal(shost->transportt);
647 error = i->f->phy_reset(phy, hard_reset);
655 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
656 const char *buf, size_t count)
658 return do_sas_phy_reset(dev, count, 0);
660 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
663 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
664 const char *buf, size_t count)
666 return do_sas_phy_reset(dev, count, 1);
668 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
670 sas_phy_protocol_attr(identify.initiator_port_protocols,
671 initiator_port_protocols);
672 sas_phy_protocol_attr(identify.target_port_protocols,
673 target_port_protocols);
674 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
676 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
677 //sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
678 sas_phy_linkspeed_attr(negotiated_linkrate);
679 sas_phy_linkspeed_attr(minimum_linkrate_hw);
680 sas_phy_linkspeed_rw_attr(minimum_linkrate);
681 sas_phy_linkspeed_attr(maximum_linkrate_hw);
682 sas_phy_linkspeed_rw_attr(maximum_linkrate);
683 sas_phy_linkerror_attr(invalid_dword_count);
684 sas_phy_linkerror_attr(running_disparity_error_count);
685 sas_phy_linkerror_attr(loss_of_dword_sync_count);
686 sas_phy_linkerror_attr(phy_reset_problem_count);
688 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
691 struct sas_phy *phy = dev_to_phy(dev);
692 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
693 struct sas_internal *i = to_sas_internal(shost->transportt);
696 i->f->phy_setup(phy);
701 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
702 "sas_phy", sas_phy_setup, NULL, NULL);
704 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
706 struct Scsi_Host *shost;
707 struct sas_internal *i;
709 if (!scsi_is_sas_phy(dev))
711 shost = dev_to_shost(dev->parent);
713 if (!shost->transportt)
715 if (shost->transportt->host_attrs.ac.class !=
716 &sas_host_class.class)
719 i = to_sas_internal(shost->transportt);
720 return &i->phy_attr_cont.ac == cont;
723 static void sas_phy_release(struct device *dev)
725 struct sas_phy *phy = dev_to_phy(dev);
726 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
727 struct sas_internal *i = to_sas_internal(shost->transportt);
729 if (i->f->phy_release)
730 i->f->phy_release(phy);
731 put_device(dev->parent);
736 * sas_phy_alloc - allocates and initialize a SAS PHY structure
737 * @parent: Parent device
740 * Allocates an SAS PHY structure. It will be added in the device tree
741 * below the device specified by @parent, which has to be either a Scsi_Host
745 * SAS PHY allocated or %NULL if the allocation failed.
747 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
749 struct Scsi_Host *shost = dev_to_shost(parent);
752 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
756 phy->number = number;
759 device_initialize(&phy->dev);
760 phy->dev.parent = get_device(parent);
761 phy->dev.release = sas_phy_release;
762 INIT_LIST_HEAD(&phy->port_siblings);
763 if (scsi_is_sas_expander_device(parent)) {
764 struct sas_rphy *rphy = dev_to_rphy(parent);
765 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
766 rphy->scsi_target_id, number);
768 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
770 transport_setup_device(&phy->dev);
774 EXPORT_SYMBOL(sas_phy_alloc);
777 * sas_phy_add - add a SAS PHY to the device hierarchy
778 * @phy: The PHY to be added
780 * Publishes a SAS PHY to the rest of the system.
782 int sas_phy_add(struct sas_phy *phy)
786 error = device_add(&phy->dev);
788 transport_add_device(&phy->dev);
789 transport_configure_device(&phy->dev);
794 EXPORT_SYMBOL(sas_phy_add);
797 * sas_phy_free - free a SAS PHY
798 * @phy: SAS PHY to free
800 * Frees the specified SAS PHY.
803 * This function must only be called on a PHY that has not
804 * successfully been added using sas_phy_add().
806 void sas_phy_free(struct sas_phy *phy)
808 transport_destroy_device(&phy->dev);
809 put_device(&phy->dev);
811 EXPORT_SYMBOL(sas_phy_free);
814 * sas_phy_delete - remove SAS PHY
815 * @phy: SAS PHY to remove
817 * Removes the specified SAS PHY. If the SAS PHY has an
818 * associated remote PHY it is removed before.
821 sas_phy_delete(struct sas_phy *phy)
823 struct device *dev = &phy->dev;
825 /* this happens if the phy is still part of a port when deleted */
826 BUG_ON(!list_empty(&phy->port_siblings));
828 transport_remove_device(dev);
830 transport_destroy_device(dev);
833 EXPORT_SYMBOL(sas_phy_delete);
836 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
837 * @dev: device to check
840 * %1 if the device represents a SAS PHY, %0 else
842 int scsi_is_sas_phy(const struct device *dev)
844 return dev->release == sas_phy_release;
846 EXPORT_SYMBOL(scsi_is_sas_phy);
849 * SAS Port attributes
851 #define sas_port_show_simple(field, name, format_string, cast) \
853 show_sas_port_##name(struct device *dev, \
854 struct device_attribute *attr, char *buf) \
856 struct sas_port *port = transport_class_to_sas_port(dev); \
858 return snprintf(buf, 20, format_string, cast port->field); \
861 #define sas_port_simple_attr(field, name, format_string, type) \
862 sas_port_show_simple(field, name, format_string, (type)) \
863 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
865 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
867 static DECLARE_TRANSPORT_CLASS(sas_port_class,
868 "sas_port", NULL, NULL, NULL);
870 static int sas_port_match(struct attribute_container *cont, struct device *dev)
872 struct Scsi_Host *shost;
873 struct sas_internal *i;
875 if (!scsi_is_sas_port(dev))
877 shost = dev_to_shost(dev->parent);
879 if (!shost->transportt)
881 if (shost->transportt->host_attrs.ac.class !=
882 &sas_host_class.class)
885 i = to_sas_internal(shost->transportt);
886 return &i->port_attr_cont.ac == cont;
890 static void sas_port_release(struct device *dev)
892 struct sas_port *port = dev_to_sas_port(dev);
894 BUG_ON(!list_empty(&port->phy_list));
896 put_device(dev->parent);
900 static void sas_port_create_link(struct sas_port *port,
905 res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
906 dev_name(&phy->dev));
909 res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
914 printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
918 static void sas_port_delete_link(struct sas_port *port,
921 sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
922 sysfs_remove_link(&phy->dev.kobj, "port");
925 /** sas_port_alloc - allocate and initialize a SAS port structure
927 * @parent: parent device
928 * @port_id: port number
930 * Allocates a SAS port structure. It will be added to the device tree
931 * below the device specified by @parent which must be either a Scsi_Host
932 * or a sas_expander_device.
934 * Returns %NULL on error
936 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
938 struct Scsi_Host *shost = dev_to_shost(parent);
939 struct sas_port *port;
941 port = kzalloc(sizeof(*port), GFP_KERNEL);
945 port->port_identifier = port_id;
947 device_initialize(&port->dev);
949 port->dev.parent = get_device(parent);
950 port->dev.release = sas_port_release;
952 mutex_init(&port->phy_list_mutex);
953 INIT_LIST_HEAD(&port->phy_list);
955 if (scsi_is_sas_expander_device(parent)) {
956 struct sas_rphy *rphy = dev_to_rphy(parent);
957 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
958 rphy->scsi_target_id, port->port_identifier);
960 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
961 port->port_identifier);
963 transport_setup_device(&port->dev);
967 EXPORT_SYMBOL(sas_port_alloc);
969 /** sas_port_alloc_num - allocate and initialize a SAS port structure
971 * @parent: parent device
973 * Allocates a SAS port structure and a number to go with it. This
974 * interface is really for adapters where the port number has no
975 * meansing, so the sas class should manage them. It will be added to
976 * the device tree below the device specified by @parent which must be
977 * either a Scsi_Host or a sas_expander_device.
979 * Returns %NULL on error
981 struct sas_port *sas_port_alloc_num(struct device *parent)
984 struct Scsi_Host *shost = dev_to_shost(parent);
985 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
987 /* FIXME: use idr for this eventually */
988 mutex_lock(&sas_host->lock);
989 if (scsi_is_sas_expander_device(parent)) {
990 struct sas_rphy *rphy = dev_to_rphy(parent);
991 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
993 index = exp->next_port_id++;
995 index = sas_host->next_port_id++;
996 mutex_unlock(&sas_host->lock);
997 return sas_port_alloc(parent, index);
999 EXPORT_SYMBOL(sas_port_alloc_num);
1002 * sas_port_add - add a SAS port to the device hierarchy
1003 * @port: port to be added
1005 * publishes a port to the rest of the system
1007 int sas_port_add(struct sas_port *port)
1011 /* No phys should be added until this is made visible */
1012 BUG_ON(!list_empty(&port->phy_list));
1014 error = device_add(&port->dev);
1019 transport_add_device(&port->dev);
1020 transport_configure_device(&port->dev);
1024 EXPORT_SYMBOL(sas_port_add);
1027 * sas_port_free - free a SAS PORT
1028 * @port: SAS PORT to free
1030 * Frees the specified SAS PORT.
1033 * This function must only be called on a PORT that has not
1034 * successfully been added using sas_port_add().
1036 void sas_port_free(struct sas_port *port)
1038 transport_destroy_device(&port->dev);
1039 put_device(&port->dev);
1041 EXPORT_SYMBOL(sas_port_free);
1044 * sas_port_delete - remove SAS PORT
1045 * @port: SAS PORT to remove
1047 * Removes the specified SAS PORT. If the SAS PORT has an
1048 * associated phys, unlink them from the port as well.
1050 void sas_port_delete(struct sas_port *port)
1052 struct device *dev = &port->dev;
1053 struct sas_phy *phy, *tmp_phy;
1056 sas_rphy_delete(port->rphy);
1060 mutex_lock(&port->phy_list_mutex);
1061 list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1063 sas_port_delete_link(port, phy);
1064 list_del_init(&phy->port_siblings);
1066 mutex_unlock(&port->phy_list_mutex);
1068 if (port->is_backlink) {
1069 struct device *parent = port->dev.parent;
1071 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1072 port->is_backlink = 0;
1075 transport_remove_device(dev);
1077 transport_destroy_device(dev);
1080 EXPORT_SYMBOL(sas_port_delete);
1083 * scsi_is_sas_port - check if a struct device represents a SAS port
1084 * @dev: device to check
1087 * %1 if the device represents a SAS Port, %0 else
1089 int scsi_is_sas_port(const struct device *dev)
1091 return dev->release == sas_port_release;
1093 EXPORT_SYMBOL(scsi_is_sas_port);
1096 * sas_port_get_phy - try to take a reference on a port member
1097 * @port: port to check
1099 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1101 struct sas_phy *phy;
1103 mutex_lock(&port->phy_list_mutex);
1104 if (list_empty(&port->phy_list))
1107 struct list_head *ent = port->phy_list.next;
1109 phy = list_entry(ent, typeof(*phy), port_siblings);
1110 get_device(&phy->dev);
1112 mutex_unlock(&port->phy_list_mutex);
1116 EXPORT_SYMBOL(sas_port_get_phy);
1119 * sas_port_add_phy - add another phy to a port to form a wide port
1120 * @port: port to add the phy to
1123 * When a port is initially created, it is empty (has no phys). All
1124 * ports must have at least one phy to operated, and all wide ports
1125 * must have at least two. The current code makes no difference
1126 * between ports and wide ports, but the only object that can be
1127 * connected to a remote device is a port, so ports must be formed on
1128 * all devices with phys if they're connected to anything.
1130 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1132 mutex_lock(&port->phy_list_mutex);
1133 if (unlikely(!list_empty(&phy->port_siblings))) {
1134 /* make sure we're already on this port */
1135 struct sas_phy *tmp;
1137 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1140 /* If this trips, you added a phy that was already
1141 * part of a different port */
1142 if (unlikely(tmp != phy)) {
1143 dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1144 dev_name(&phy->dev));
1148 sas_port_create_link(port, phy);
1149 list_add_tail(&phy->port_siblings, &port->phy_list);
1152 mutex_unlock(&port->phy_list_mutex);
1154 EXPORT_SYMBOL(sas_port_add_phy);
1157 * sas_port_delete_phy - remove a phy from a port or wide port
1158 * @port: port to remove the phy from
1159 * @phy: phy to remove
1161 * This operation is used for tearing down ports again. It must be
1162 * done to every port or wide port before calling sas_port_delete.
1164 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1166 mutex_lock(&port->phy_list_mutex);
1167 sas_port_delete_link(port, phy);
1168 list_del_init(&phy->port_siblings);
1170 mutex_unlock(&port->phy_list_mutex);
1172 EXPORT_SYMBOL(sas_port_delete_phy);
1174 void sas_port_mark_backlink(struct sas_port *port)
1177 struct device *parent = port->dev.parent->parent->parent;
1179 if (port->is_backlink)
1181 port->is_backlink = 1;
1182 res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1188 printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1192 EXPORT_SYMBOL(sas_port_mark_backlink);
1195 * SAS remote PHY attributes.
1198 #define sas_rphy_show_simple(field, name, format_string, cast) \
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); \
1205 return snprintf(buf, 20, format_string, cast rphy->field); \
1208 #define sas_rphy_simple_attr(field, name, format_string, type) \
1209 sas_rphy_show_simple(field, name, format_string, (type)) \
1210 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1211 show_sas_rphy_##name, NULL)
1213 #define sas_rphy_show_protocol(field, name) \
1215 show_sas_rphy_##name(struct device *dev, \
1216 struct device_attribute *attr, char *buf) \
1218 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1221 return snprintf(buf, 20, "none\n"); \
1222 return get_sas_protocol_names(rphy->field, buf); \
1225 #define sas_rphy_protocol_attr(field, name) \
1226 sas_rphy_show_protocol(field, name) \
1227 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1228 show_sas_rphy_##name, NULL)
1231 show_sas_rphy_device_type(struct device *dev,
1232 struct device_attribute *attr, char *buf)
1234 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1236 if (!rphy->identify.device_type)
1237 return snprintf(buf, 20, "none\n");
1238 return get_sas_device_type_names(
1239 rphy->identify.device_type, buf);
1242 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1243 show_sas_rphy_device_type, NULL);
1246 show_sas_rphy_enclosure_identifier(struct device *dev,
1247 struct device_attribute *attr, char *buf)
1249 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1250 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1251 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1252 struct sas_internal *i = to_sas_internal(shost->transportt);
1256 error = i->f->get_enclosure_identifier(rphy, &identifier);
1259 return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1262 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1263 show_sas_rphy_enclosure_identifier, NULL);
1266 show_sas_rphy_bay_identifier(struct device *dev,
1267 struct device_attribute *attr, char *buf)
1269 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1270 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1271 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1272 struct sas_internal *i = to_sas_internal(shost->transportt);
1275 val = i->f->get_bay_identifier(rphy);
1278 return sprintf(buf, "%d\n", val);
1281 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1282 show_sas_rphy_bay_identifier, NULL);
1284 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1285 initiator_port_protocols);
1286 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1287 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1288 unsigned long long);
1289 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1290 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1292 /* only need 8 bytes of data plus header (4 or 8) */
1295 int sas_read_port_mode_page(struct scsi_device *sdev)
1297 char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1298 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1299 struct scsi_mode_data mode_data;
1305 res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1309 if (!scsi_status_is_good(res))
1312 msdata = buffer + mode_data.header_length +
1313 mode_data.block_descriptor_length;
1315 if (msdata - buffer > BUF_SIZE - 8)
1320 rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1321 rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1322 rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1328 EXPORT_SYMBOL(sas_read_port_mode_page);
1330 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1331 "sas_end_device", NULL, NULL, NULL);
1333 #define sas_end_dev_show_simple(field, name, format_string, cast) \
1335 show_sas_end_dev_##name(struct device *dev, \
1336 struct device_attribute *attr, char *buf) \
1338 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1339 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1341 return snprintf(buf, 20, format_string, cast rdev->field); \
1344 #define sas_end_dev_simple_attr(field, name, format_string, type) \
1345 sas_end_dev_show_simple(field, name, format_string, (type)) \
1346 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1347 show_sas_end_dev_##name, NULL)
1349 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1350 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1352 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1354 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1356 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1359 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1360 "sas_expander", NULL, NULL, NULL);
1362 #define sas_expander_show_simple(field, name, format_string, cast) \
1364 show_sas_expander_##name(struct device *dev, \
1365 struct device_attribute *attr, char *buf) \
1367 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1368 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1370 return snprintf(buf, 20, format_string, cast edev->field); \
1373 #define sas_expander_simple_attr(field, name, format_string, type) \
1374 sas_expander_show_simple(field, name, format_string, (type)) \
1375 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1376 show_sas_expander_##name, NULL)
1378 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1379 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1380 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1381 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1383 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1384 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1386 sas_expander_simple_attr(level, level, "%d\n", int);
1388 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1389 "sas_device", NULL, NULL, NULL);
1391 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1393 struct Scsi_Host *shost;
1394 struct sas_internal *i;
1396 if (!scsi_is_sas_rphy(dev))
1398 shost = dev_to_shost(dev->parent->parent);
1400 if (!shost->transportt)
1402 if (shost->transportt->host_attrs.ac.class !=
1403 &sas_host_class.class)
1406 i = to_sas_internal(shost->transportt);
1407 return &i->rphy_attr_cont.ac == cont;
1410 static int sas_end_dev_match(struct attribute_container *cont,
1413 struct Scsi_Host *shost;
1414 struct sas_internal *i;
1415 struct sas_rphy *rphy;
1417 if (!scsi_is_sas_rphy(dev))
1419 shost = dev_to_shost(dev->parent->parent);
1420 rphy = dev_to_rphy(dev);
1422 if (!shost->transportt)
1424 if (shost->transportt->host_attrs.ac.class !=
1425 &sas_host_class.class)
1428 i = to_sas_internal(shost->transportt);
1429 return &i->end_dev_attr_cont.ac == cont &&
1430 rphy->identify.device_type == SAS_END_DEVICE;
1433 static int sas_expander_match(struct attribute_container *cont,
1436 struct Scsi_Host *shost;
1437 struct sas_internal *i;
1438 struct sas_rphy *rphy;
1440 if (!scsi_is_sas_rphy(dev))
1442 shost = dev_to_shost(dev->parent->parent);
1443 rphy = dev_to_rphy(dev);
1445 if (!shost->transportt)
1447 if (shost->transportt->host_attrs.ac.class !=
1448 &sas_host_class.class)
1451 i = to_sas_internal(shost->transportt);
1452 return &i->expander_attr_cont.ac == cont &&
1453 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1454 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1457 static void sas_expander_release(struct device *dev)
1459 struct sas_rphy *rphy = dev_to_rphy(dev);
1460 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1463 blk_cleanup_queue(rphy->q);
1465 put_device(dev->parent);
1469 static void sas_end_device_release(struct device *dev)
1471 struct sas_rphy *rphy = dev_to_rphy(dev);
1472 struct sas_end_device *edev = rphy_to_end_device(rphy);
1475 blk_cleanup_queue(rphy->q);
1477 put_device(dev->parent);
1482 * sas_rphy_initialize - common rphy initialization
1483 * @rphy: rphy to initialise
1485 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1486 * initialise the common rphy component of each.
1488 static void sas_rphy_initialize(struct sas_rphy *rphy)
1490 INIT_LIST_HEAD(&rphy->list);
1494 * sas_end_device_alloc - allocate an rphy for an end device
1495 * @parent: which port
1497 * Allocates an SAS remote PHY structure, connected to @parent.
1500 * SAS PHY allocated or %NULL if the allocation failed.
1502 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1504 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1505 struct sas_end_device *rdev;
1507 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1512 device_initialize(&rdev->rphy.dev);
1513 rdev->rphy.dev.parent = get_device(&parent->dev);
1514 rdev->rphy.dev.release = sas_end_device_release;
1515 if (scsi_is_sas_expander_device(parent->dev.parent)) {
1516 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1517 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1518 shost->host_no, rphy->scsi_target_id,
1519 parent->port_identifier);
1521 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1522 shost->host_no, parent->port_identifier);
1523 rdev->rphy.identify.device_type = SAS_END_DEVICE;
1524 sas_rphy_initialize(&rdev->rphy);
1525 transport_setup_device(&rdev->rphy.dev);
1529 EXPORT_SYMBOL(sas_end_device_alloc);
1532 * sas_expander_alloc - allocate an rphy for an end device
1533 * @parent: which port
1534 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1536 * Allocates an SAS remote PHY structure, connected to @parent.
1539 * SAS PHY allocated or %NULL if the allocation failed.
1541 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1542 enum sas_device_type type)
1544 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1545 struct sas_expander_device *rdev;
1546 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1548 BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1549 type != SAS_FANOUT_EXPANDER_DEVICE);
1551 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1556 device_initialize(&rdev->rphy.dev);
1557 rdev->rphy.dev.parent = get_device(&parent->dev);
1558 rdev->rphy.dev.release = sas_expander_release;
1559 mutex_lock(&sas_host->lock);
1560 rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1561 mutex_unlock(&sas_host->lock);
1562 dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1563 shost->host_no, rdev->rphy.scsi_target_id);
1564 rdev->rphy.identify.device_type = type;
1565 sas_rphy_initialize(&rdev->rphy);
1566 transport_setup_device(&rdev->rphy.dev);
1570 EXPORT_SYMBOL(sas_expander_alloc);
1573 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
1574 * @rphy: The remote PHY to be added
1576 * Publishes a SAS remote PHY to the rest of the system.
1578 int sas_rphy_add(struct sas_rphy *rphy)
1580 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1581 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1582 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1583 struct sas_identify *identify = &rphy->identify;
1588 parent->rphy = rphy;
1590 error = device_add(&rphy->dev);
1593 transport_add_device(&rphy->dev);
1594 transport_configure_device(&rphy->dev);
1595 if (sas_bsg_initialize(shost, rphy))
1596 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1599 mutex_lock(&sas_host->lock);
1600 list_add_tail(&rphy->list, &sas_host->rphy_list);
1601 if (identify->device_type == SAS_END_DEVICE &&
1602 (identify->target_port_protocols &
1603 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1604 rphy->scsi_target_id = sas_host->next_target_id++;
1605 else if (identify->device_type == SAS_END_DEVICE)
1606 rphy->scsi_target_id = -1;
1607 mutex_unlock(&sas_host->lock);
1609 if (identify->device_type == SAS_END_DEVICE &&
1610 rphy->scsi_target_id != -1) {
1613 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1614 lun = SCAN_WILD_CARD;
1618 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1624 EXPORT_SYMBOL(sas_rphy_add);
1627 * sas_rphy_free - free a SAS remote PHY
1628 * @rphy: SAS remote PHY to free
1630 * Frees the specified SAS remote PHY.
1633 * This function must only be called on a remote
1634 * PHY that has not successfully been added using
1635 * sas_rphy_add() (or has been sas_rphy_remove()'d)
1637 void sas_rphy_free(struct sas_rphy *rphy)
1639 struct device *dev = &rphy->dev;
1640 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1641 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1643 mutex_lock(&sas_host->lock);
1644 list_del(&rphy->list);
1645 mutex_unlock(&sas_host->lock);
1647 transport_destroy_device(dev);
1651 EXPORT_SYMBOL(sas_rphy_free);
1654 * sas_rphy_delete - remove and free SAS remote PHY
1655 * @rphy: SAS remote PHY to remove and free
1657 * Removes the specified SAS remote PHY and frees it.
1660 sas_rphy_delete(struct sas_rphy *rphy)
1662 sas_rphy_remove(rphy);
1663 sas_rphy_free(rphy);
1665 EXPORT_SYMBOL(sas_rphy_delete);
1668 * sas_rphy_unlink - unlink SAS remote PHY
1669 * @rphy: SAS remote phy to unlink from its parent port
1671 * Removes port reference to an rphy
1673 void sas_rphy_unlink(struct sas_rphy *rphy)
1675 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1677 parent->rphy = NULL;
1679 EXPORT_SYMBOL(sas_rphy_unlink);
1682 * sas_rphy_remove - remove SAS remote PHY
1683 * @rphy: SAS remote phy to remove
1685 * Removes the specified SAS remote PHY.
1688 sas_rphy_remove(struct sas_rphy *rphy)
1690 struct device *dev = &rphy->dev;
1692 switch (rphy->identify.device_type) {
1693 case SAS_END_DEVICE:
1694 scsi_remove_target(dev);
1696 case SAS_EDGE_EXPANDER_DEVICE:
1697 case SAS_FANOUT_EXPANDER_DEVICE:
1698 sas_remove_children(dev);
1704 sas_rphy_unlink(rphy);
1705 sas_bsg_remove(NULL, rphy);
1706 transport_remove_device(dev);
1709 EXPORT_SYMBOL(sas_rphy_remove);
1712 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1713 * @dev: device to check
1716 * %1 if the device represents a SAS remote PHY, %0 else
1718 int scsi_is_sas_rphy(const struct device *dev)
1720 return dev->release == sas_end_device_release ||
1721 dev->release == sas_expander_release;
1723 EXPORT_SYMBOL(scsi_is_sas_rphy);
1730 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1733 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1734 struct sas_rphy *rphy;
1736 mutex_lock(&sas_host->lock);
1737 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1738 if (rphy->identify.device_type != SAS_END_DEVICE ||
1739 rphy->scsi_target_id == -1)
1742 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1743 (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1744 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1745 lun, SCSI_SCAN_MANUAL);
1748 mutex_unlock(&sas_host->lock);
1755 * Setup / Teardown code
1758 #define SETUP_TEMPLATE(attrb, field, perm, test) \
1759 i->private_##attrb[count] = dev_attr_##field; \
1760 i->private_##attrb[count].attr.mode = perm; \
1761 i->attrb[count] = &i->private_##attrb[count]; \
1765 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1766 i->private_##attrb[count] = dev_attr_##field; \
1767 i->private_##attrb[count].attr.mode = perm; \
1769 i->private_##attrb[count].attr.mode = ro_perm; \
1770 i->private_##attrb[count].store = NULL; \
1772 i->attrb[count] = &i->private_##attrb[count]; \
1776 #define SETUP_RPORT_ATTRIBUTE(field) \
1777 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1779 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1780 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1782 #define SETUP_PHY_ATTRIBUTE(field) \
1783 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1785 #define SETUP_PHY_ATTRIBUTE_RW(field) \
1786 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1787 !i->f->set_phy_speed, S_IRUGO)
1789 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1790 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1791 !i->f->func, S_IRUGO)
1793 #define SETUP_PORT_ATTRIBUTE(field) \
1794 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1796 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1797 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1799 #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1800 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1802 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1803 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1805 #define SETUP_END_DEV_ATTRIBUTE(field) \
1806 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1808 #define SETUP_EXPANDER_ATTRIBUTE(field) \
1809 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1812 * sas_attach_transport - instantiate SAS transport template
1813 * @ft: SAS transport class function template
1815 struct scsi_transport_template *
1816 sas_attach_transport(struct sas_function_template *ft)
1818 struct sas_internal *i;
1821 i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1825 i->t.user_scan = sas_user_scan;
1827 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1828 i->t.host_attrs.ac.class = &sas_host_class.class;
1829 i->t.host_attrs.ac.match = sas_host_match;
1830 transport_container_register(&i->t.host_attrs);
1831 i->t.host_size = sizeof(struct sas_host_attrs);
1833 i->phy_attr_cont.ac.class = &sas_phy_class.class;
1834 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1835 i->phy_attr_cont.ac.match = sas_phy_match;
1836 transport_container_register(&i->phy_attr_cont);
1838 i->port_attr_cont.ac.class = &sas_port_class.class;
1839 i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1840 i->port_attr_cont.ac.match = sas_port_match;
1841 transport_container_register(&i->port_attr_cont);
1843 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1844 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1845 i->rphy_attr_cont.ac.match = sas_rphy_match;
1846 transport_container_register(&i->rphy_attr_cont);
1848 i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1849 i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1850 i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1851 transport_container_register(&i->end_dev_attr_cont);
1853 i->expander_attr_cont.ac.class = &sas_expander_class.class;
1854 i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1855 i->expander_attr_cont.ac.match = sas_expander_match;
1856 transport_container_register(&i->expander_attr_cont);
1861 SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1862 SETUP_PHY_ATTRIBUTE(target_port_protocols);
1863 SETUP_PHY_ATTRIBUTE(device_type);
1864 SETUP_PHY_ATTRIBUTE(sas_address);
1865 SETUP_PHY_ATTRIBUTE(phy_identifier);
1866 //SETUP_PHY_ATTRIBUTE(port_identifier);
1867 SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1868 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1869 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1870 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1871 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1873 SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1874 SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1875 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1876 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1877 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1878 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1879 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1880 i->phy_attrs[count] = NULL;
1883 SETUP_PORT_ATTRIBUTE(num_phys);
1884 i->port_attrs[count] = NULL;
1887 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1888 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1889 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1890 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1891 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1892 SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1893 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1894 get_enclosure_identifier);
1895 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1896 get_bay_identifier);
1897 i->rphy_attrs[count] = NULL;
1900 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1901 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1902 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1903 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1904 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1905 i->end_dev_attrs[count] = NULL;
1908 SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1909 SETUP_EXPANDER_ATTRIBUTE(product_id);
1910 SETUP_EXPANDER_ATTRIBUTE(product_rev);
1911 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1912 SETUP_EXPANDER_ATTRIBUTE(component_id);
1913 SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1914 SETUP_EXPANDER_ATTRIBUTE(level);
1915 i->expander_attrs[count] = NULL;
1919 EXPORT_SYMBOL(sas_attach_transport);
1922 * sas_release_transport - release SAS transport template instance
1923 * @t: transport template instance
1925 void sas_release_transport(struct scsi_transport_template *t)
1927 struct sas_internal *i = to_sas_internal(t);
1929 transport_container_unregister(&i->t.host_attrs);
1930 transport_container_unregister(&i->phy_attr_cont);
1931 transport_container_unregister(&i->port_attr_cont);
1932 transport_container_unregister(&i->rphy_attr_cont);
1933 transport_container_unregister(&i->end_dev_attr_cont);
1934 transport_container_unregister(&i->expander_attr_cont);
1938 EXPORT_SYMBOL(sas_release_transport);
1940 static __init int sas_transport_init(void)
1944 error = transport_class_register(&sas_host_class);
1947 error = transport_class_register(&sas_phy_class);
1949 goto out_unregister_transport;
1950 error = transport_class_register(&sas_port_class);
1952 goto out_unregister_phy;
1953 error = transport_class_register(&sas_rphy_class);
1955 goto out_unregister_port;
1956 error = transport_class_register(&sas_end_dev_class);
1958 goto out_unregister_rphy;
1959 error = transport_class_register(&sas_expander_class);
1961 goto out_unregister_end_dev;
1965 out_unregister_end_dev:
1966 transport_class_unregister(&sas_end_dev_class);
1967 out_unregister_rphy:
1968 transport_class_unregister(&sas_rphy_class);
1969 out_unregister_port:
1970 transport_class_unregister(&sas_port_class);
1972 transport_class_unregister(&sas_phy_class);
1973 out_unregister_transport:
1974 transport_class_unregister(&sas_host_class);
1980 static void __exit sas_transport_exit(void)
1982 transport_class_unregister(&sas_host_class);
1983 transport_class_unregister(&sas_phy_class);
1984 transport_class_unregister(&sas_port_class);
1985 transport_class_unregister(&sas_rphy_class);
1986 transport_class_unregister(&sas_end_dev_class);
1987 transport_class_unregister(&sas_expander_class);
1990 MODULE_AUTHOR("Christoph Hellwig");
1991 MODULE_DESCRIPTION("SAS Transport Attributes");
1992 MODULE_LICENSE("GPL");
1994 module_init(sas_transport_init);
1995 module_exit(sas_transport_exit);