1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2005-2006 Dell Inc.
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_cmnd.h>
37 #include <scsi/scsi_request.h>
38 #include <scsi/scsi_device.h>
39 #include <scsi/scsi_host.h>
40 #include <scsi/scsi_transport.h>
41 #include <scsi/scsi_transport_sas.h>
43 #include "scsi_sas_internal.h"
44 struct sas_host_attrs {
45 struct list_head rphy_list;
47 struct request_queue *q;
52 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
56 * Hack to allow attributes of the same name in different objects.
58 #define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
59 struct device_attribute dev_attr_##_prefix##_##_name = \
60 __ATTR(_name,_mode,_show,_store)
64 * Pretty printing helpers
67 #define sas_bitfield_name_match(title, table) \
69 get_sas_##title##_names(u32 table_key, char *buf) \
75 for (i = 0; i < ARRAY_SIZE(table); i++) { \
76 if (table[i].value & table_key) { \
77 len += sprintf(buf + len, "%s%s", \
78 prefix, table[i].name); \
82 len += sprintf(buf + len, "\n"); \
86 #define sas_bitfield_name_set(title, table) \
88 set_sas_##title##_names(u32 *table_key, const char *buf) \
93 for (i = 0; i < ARRAY_SIZE(table); i++) { \
94 len = strlen(table[i].name); \
95 if (strncmp(buf, table[i].name, len) == 0 && \
96 (buf[len] == '\n' || buf[len] == '\0')) { \
97 *table_key = table[i].value; \
104 #define sas_bitfield_name_search(title, table) \
106 get_sas_##title##_names(u32 table_key, char *buf) \
111 for (i = 0; i < ARRAY_SIZE(table); i++) { \
112 if (table[i].value == table_key) { \
113 len += sprintf(buf + len, "%s", \
118 len += sprintf(buf + len, "\n"); \
125 } sas_device_type_names[] = {
126 { SAS_PHY_UNUSED, "unused" },
127 { SAS_END_DEVICE, "end device" },
128 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
129 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
131 sas_bitfield_name_search(device_type, sas_device_type_names)
137 } sas_protocol_names[] = {
138 { SAS_PROTOCOL_SATA, "sata" },
139 { SAS_PROTOCOL_SMP, "smp" },
140 { SAS_PROTOCOL_STP, "stp" },
141 { SAS_PROTOCOL_SSP, "ssp" },
143 sas_bitfield_name_match(protocol, sas_protocol_names)
148 } sas_linkspeed_names[] = {
149 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
150 { SAS_PHY_DISABLED, "Phy disabled" },
151 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
152 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
153 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
154 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
155 { SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
156 { SAS_LINK_RATE_12_0_GBPS, "12.0 Gbit" },
158 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
159 sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
161 static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
163 struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
164 struct sas_end_device *rdev;
166 BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
168 rdev = rphy_to_end_device(rphy);
172 static int sas_smp_dispatch(struct bsg_job *job)
174 struct Scsi_Host *shost = dev_to_shost(job->dev);
175 struct sas_rphy *rphy = NULL;
177 if (!scsi_is_host_device(job->dev))
178 rphy = dev_to_rphy(job->dev);
180 if (!job->reply_payload.payload_len) {
181 dev_warn(job->dev, "space for a smp response is missing\n");
182 bsg_job_done(job, -EINVAL, 0);
186 to_sas_internal(shost->transportt)->f->smp_handler(job, shost, rphy);
190 static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
192 struct request_queue *q;
194 if (!to_sas_internal(shost->transportt)->f->smp_handler) {
195 printk("%s can't handle SMP requests\n", shost->hostt->name);
200 q = bsg_setup_queue(&rphy->dev, dev_name(&rphy->dev),
201 sas_smp_dispatch, NULL, 0);
208 snprintf(name, sizeof(name), "sas_host%d", shost->host_no);
209 q = bsg_setup_queue(&shost->shost_gendev, name,
210 sas_smp_dispatch, NULL, 0);
213 to_sas_host_attrs(shost)->q = q;
220 * SAS host attributes
223 static int sas_host_setup(struct transport_container *tc, struct device *dev,
226 struct Scsi_Host *shost = dev_to_shost(dev);
227 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
229 INIT_LIST_HEAD(&sas_host->rphy_list);
230 mutex_init(&sas_host->lock);
231 sas_host->next_target_id = 0;
232 sas_host->next_expander_id = 0;
233 sas_host->next_port_id = 0;
235 if (sas_bsg_initialize(shost, NULL))
236 dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
242 static int sas_host_remove(struct transport_container *tc, struct device *dev,
245 struct Scsi_Host *shost = dev_to_shost(dev);
246 struct request_queue *q = to_sas_host_attrs(shost)->q;
252 static DECLARE_TRANSPORT_CLASS(sas_host_class,
253 "sas_host", sas_host_setup, sas_host_remove, NULL);
255 static int sas_host_match(struct attribute_container *cont,
258 struct Scsi_Host *shost;
259 struct sas_internal *i;
261 if (!scsi_is_host_device(dev))
263 shost = dev_to_shost(dev);
265 if (!shost->transportt)
267 if (shost->transportt->host_attrs.ac.class !=
268 &sas_host_class.class)
271 i = to_sas_internal(shost->transportt);
272 return &i->t.host_attrs.ac == cont;
275 static int do_sas_phy_delete(struct device *dev, void *data)
277 int pass = (int)(unsigned long)data;
279 if (pass == 0 && scsi_is_sas_port(dev))
280 sas_port_delete(dev_to_sas_port(dev));
281 else if (pass == 1 && scsi_is_sas_phy(dev))
282 sas_phy_delete(dev_to_phy(dev));
287 * sas_remove_children - tear down a devices SAS data structures
288 * @dev: device belonging to the sas object
290 * Removes all SAS PHYs and remote PHYs for a given object
292 void sas_remove_children(struct device *dev)
294 device_for_each_child(dev, (void *)0, do_sas_phy_delete);
295 device_for_each_child(dev, (void *)1, do_sas_phy_delete);
297 EXPORT_SYMBOL(sas_remove_children);
300 * sas_remove_host - tear down a Scsi_Host's SAS data structures
301 * @shost: Scsi Host that is torn down
303 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host and remove the
306 * Note: Do not call scsi_remove_host() on the Scsi_Host any more, as it is
309 void sas_remove_host(struct Scsi_Host *shost)
311 sas_remove_children(&shost->shost_gendev);
312 scsi_remove_host(shost);
314 EXPORT_SYMBOL(sas_remove_host);
317 * sas_get_address - return the SAS address of the device
320 * Returns the SAS address of the scsi device
322 u64 sas_get_address(struct scsi_device *sdev)
324 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
326 return rdev->rphy.identify.sas_address;
328 EXPORT_SYMBOL(sas_get_address);
331 * sas_tlr_supported - checking TLR bit in vpd 0x90
332 * @sdev: scsi device struct
334 * Check Transport Layer Retries are supported or not.
335 * If vpd page 0x90 is present, TRL is supported.
339 sas_tlr_supported(struct scsi_device *sdev)
341 const int vpd_len = 32;
342 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
343 char *buffer = kzalloc(vpd_len, GFP_KERNEL);
349 if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
353 * Magic numbers: the VPD Protocol page (0x90)
354 * has a 4 byte header and then one entry per device port
355 * the TLR bit is at offset 8 on each port entry
356 * if we take the first port, that's at total offset 12
358 ret = buffer[12] & 0x01;
362 rdev->tlr_supported = ret;
366 EXPORT_SYMBOL_GPL(sas_tlr_supported);
369 * sas_disable_tlr - setting TLR flags
370 * @sdev: scsi device struct
372 * Seting tlr_enabled flag to 0.
376 sas_disable_tlr(struct scsi_device *sdev)
378 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
380 rdev->tlr_enabled = 0;
382 EXPORT_SYMBOL_GPL(sas_disable_tlr);
385 * sas_enable_tlr - setting TLR flags
386 * @sdev: scsi device struct
388 * Seting tlr_enabled flag 1.
391 void sas_enable_tlr(struct scsi_device *sdev)
393 unsigned int tlr_supported = 0;
394 tlr_supported = sas_tlr_supported(sdev);
397 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
399 rdev->tlr_enabled = 1;
404 EXPORT_SYMBOL_GPL(sas_enable_tlr);
406 unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
408 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
409 return rdev->tlr_enabled;
411 EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
417 #define sas_phy_show_simple(field, name, format_string, cast) \
419 show_sas_phy_##name(struct device *dev, \
420 struct device_attribute *attr, char *buf) \
422 struct sas_phy *phy = transport_class_to_phy(dev); \
424 return snprintf(buf, 20, format_string, cast phy->field); \
427 #define sas_phy_simple_attr(field, name, format_string, type) \
428 sas_phy_show_simple(field, name, format_string, (type)) \
429 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
431 #define sas_phy_show_protocol(field, name) \
433 show_sas_phy_##name(struct device *dev, \
434 struct device_attribute *attr, char *buf) \
436 struct sas_phy *phy = transport_class_to_phy(dev); \
439 return snprintf(buf, 20, "none\n"); \
440 return get_sas_protocol_names(phy->field, buf); \
443 #define sas_phy_protocol_attr(field, name) \
444 sas_phy_show_protocol(field, name) \
445 static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
447 #define sas_phy_show_linkspeed(field) \
449 show_sas_phy_##field(struct device *dev, \
450 struct device_attribute *attr, char *buf) \
452 struct sas_phy *phy = transport_class_to_phy(dev); \
454 return get_sas_linkspeed_names(phy->field, buf); \
457 /* Fudge to tell if we're minimum or maximum */
458 #define sas_phy_store_linkspeed(field) \
460 store_sas_phy_##field(struct device *dev, \
461 struct device_attribute *attr, \
462 const char *buf, size_t count) \
464 struct sas_phy *phy = transport_class_to_phy(dev); \
465 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
466 struct sas_internal *i = to_sas_internal(shost->transportt); \
468 struct sas_phy_linkrates rates = {0}; \
471 error = set_sas_linkspeed_names(&value, buf); \
474 rates.field = value; \
475 error = i->f->set_phy_speed(phy, &rates); \
477 return error ? error : count; \
480 #define sas_phy_linkspeed_rw_attr(field) \
481 sas_phy_show_linkspeed(field) \
482 sas_phy_store_linkspeed(field) \
483 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
484 store_sas_phy_##field)
486 #define sas_phy_linkspeed_attr(field) \
487 sas_phy_show_linkspeed(field) \
488 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
491 #define sas_phy_show_linkerror(field) \
493 show_sas_phy_##field(struct device *dev, \
494 struct device_attribute *attr, char *buf) \
496 struct sas_phy *phy = transport_class_to_phy(dev); \
497 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
498 struct sas_internal *i = to_sas_internal(shost->transportt); \
501 error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
504 return snprintf(buf, 20, "%u\n", phy->field); \
507 #define sas_phy_linkerror_attr(field) \
508 sas_phy_show_linkerror(field) \
509 static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
513 show_sas_device_type(struct device *dev,
514 struct device_attribute *attr, char *buf)
516 struct sas_phy *phy = transport_class_to_phy(dev);
518 if (!phy->identify.device_type)
519 return snprintf(buf, 20, "none\n");
520 return get_sas_device_type_names(phy->identify.device_type, buf);
522 static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
524 static ssize_t do_sas_phy_enable(struct device *dev,
525 size_t count, int enable)
527 struct sas_phy *phy = transport_class_to_phy(dev);
528 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
529 struct sas_internal *i = to_sas_internal(shost->transportt);
532 error = i->f->phy_enable(phy, enable);
535 phy->enabled = enable;
540 store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
541 const char *buf, size_t count)
548 do_sas_phy_enable(dev, count, 0);
551 do_sas_phy_enable(dev, count, 1);
561 show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
564 struct sas_phy *phy = transport_class_to_phy(dev);
566 return snprintf(buf, 20, "%d\n", phy->enabled);
569 static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
570 store_sas_phy_enable);
573 do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
575 struct sas_phy *phy = transport_class_to_phy(dev);
576 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
577 struct sas_internal *i = to_sas_internal(shost->transportt);
580 error = i->f->phy_reset(phy, hard_reset);
588 store_sas_link_reset(struct device *dev, struct device_attribute *attr,
589 const char *buf, size_t count)
591 return do_sas_phy_reset(dev, count, 0);
593 static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
596 store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
597 const char *buf, size_t count)
599 return do_sas_phy_reset(dev, count, 1);
601 static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
603 sas_phy_protocol_attr(identify.initiator_port_protocols,
604 initiator_port_protocols);
605 sas_phy_protocol_attr(identify.target_port_protocols,
606 target_port_protocols);
607 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
609 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
610 sas_phy_linkspeed_attr(negotiated_linkrate);
611 sas_phy_linkspeed_attr(minimum_linkrate_hw);
612 sas_phy_linkspeed_rw_attr(minimum_linkrate);
613 sas_phy_linkspeed_attr(maximum_linkrate_hw);
614 sas_phy_linkspeed_rw_attr(maximum_linkrate);
615 sas_phy_linkerror_attr(invalid_dword_count);
616 sas_phy_linkerror_attr(running_disparity_error_count);
617 sas_phy_linkerror_attr(loss_of_dword_sync_count);
618 sas_phy_linkerror_attr(phy_reset_problem_count);
620 static int sas_phy_setup(struct transport_container *tc, struct device *dev,
623 struct sas_phy *phy = dev_to_phy(dev);
624 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
625 struct sas_internal *i = to_sas_internal(shost->transportt);
628 i->f->phy_setup(phy);
633 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
634 "sas_phy", sas_phy_setup, NULL, NULL);
636 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
638 struct Scsi_Host *shost;
639 struct sas_internal *i;
641 if (!scsi_is_sas_phy(dev))
643 shost = dev_to_shost(dev->parent);
645 if (!shost->transportt)
647 if (shost->transportt->host_attrs.ac.class !=
648 &sas_host_class.class)
651 i = to_sas_internal(shost->transportt);
652 return &i->phy_attr_cont.ac == cont;
655 static void sas_phy_release(struct device *dev)
657 struct sas_phy *phy = dev_to_phy(dev);
658 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
659 struct sas_internal *i = to_sas_internal(shost->transportt);
661 if (i->f->phy_release)
662 i->f->phy_release(phy);
663 put_device(dev->parent);
668 * sas_phy_alloc - allocates and initialize a SAS PHY structure
669 * @parent: Parent device
672 * Allocates an SAS PHY structure. It will be added in the device tree
673 * below the device specified by @parent, which has to be either a Scsi_Host
677 * SAS PHY allocated or %NULL if the allocation failed.
679 struct sas_phy *sas_phy_alloc(struct device *parent, int number)
681 struct Scsi_Host *shost = dev_to_shost(parent);
684 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
688 phy->number = number;
691 device_initialize(&phy->dev);
692 phy->dev.parent = get_device(parent);
693 phy->dev.release = sas_phy_release;
694 INIT_LIST_HEAD(&phy->port_siblings);
695 if (scsi_is_sas_expander_device(parent)) {
696 struct sas_rphy *rphy = dev_to_rphy(parent);
697 dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
698 rphy->scsi_target_id, number);
700 dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
702 transport_setup_device(&phy->dev);
706 EXPORT_SYMBOL(sas_phy_alloc);
709 * sas_phy_add - add a SAS PHY to the device hierarchy
710 * @phy: The PHY to be added
712 * Publishes a SAS PHY to the rest of the system.
714 int sas_phy_add(struct sas_phy *phy)
718 error = device_add(&phy->dev);
722 error = transport_add_device(&phy->dev);
724 device_del(&phy->dev);
727 transport_configure_device(&phy->dev);
731 EXPORT_SYMBOL(sas_phy_add);
734 * sas_phy_free - free a SAS PHY
735 * @phy: SAS PHY to free
737 * Frees the specified SAS PHY.
740 * This function must only be called on a PHY that has not
741 * successfully been added using sas_phy_add().
743 void sas_phy_free(struct sas_phy *phy)
745 transport_destroy_device(&phy->dev);
746 put_device(&phy->dev);
748 EXPORT_SYMBOL(sas_phy_free);
751 * sas_phy_delete - remove SAS PHY
752 * @phy: SAS PHY to remove
754 * Removes the specified SAS PHY. If the SAS PHY has an
755 * associated remote PHY it is removed before.
758 sas_phy_delete(struct sas_phy *phy)
760 struct device *dev = &phy->dev;
762 /* this happens if the phy is still part of a port when deleted */
763 BUG_ON(!list_empty(&phy->port_siblings));
765 transport_remove_device(dev);
767 transport_destroy_device(dev);
770 EXPORT_SYMBOL(sas_phy_delete);
773 * scsi_is_sas_phy - check if a struct device represents a SAS PHY
774 * @dev: device to check
777 * %1 if the device represents a SAS PHY, %0 else
779 int scsi_is_sas_phy(const struct device *dev)
781 return dev->release == sas_phy_release;
783 EXPORT_SYMBOL(scsi_is_sas_phy);
786 * SAS Port attributes
788 #define sas_port_show_simple(field, name, format_string, cast) \
790 show_sas_port_##name(struct device *dev, \
791 struct device_attribute *attr, char *buf) \
793 struct sas_port *port = transport_class_to_sas_port(dev); \
795 return snprintf(buf, 20, format_string, cast port->field); \
798 #define sas_port_simple_attr(field, name, format_string, type) \
799 sas_port_show_simple(field, name, format_string, (type)) \
800 static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
802 sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
804 static DECLARE_TRANSPORT_CLASS(sas_port_class,
805 "sas_port", NULL, NULL, NULL);
807 static int sas_port_match(struct attribute_container *cont, struct device *dev)
809 struct Scsi_Host *shost;
810 struct sas_internal *i;
812 if (!scsi_is_sas_port(dev))
814 shost = dev_to_shost(dev->parent);
816 if (!shost->transportt)
818 if (shost->transportt->host_attrs.ac.class !=
819 &sas_host_class.class)
822 i = to_sas_internal(shost->transportt);
823 return &i->port_attr_cont.ac == cont;
827 static void sas_port_release(struct device *dev)
829 struct sas_port *port = dev_to_sas_port(dev);
831 BUG_ON(!list_empty(&port->phy_list));
833 put_device(dev->parent);
837 static void sas_port_create_link(struct sas_port *port,
842 res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
843 dev_name(&phy->dev));
846 res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
851 printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
855 static void sas_port_delete_link(struct sas_port *port,
858 sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
859 sysfs_remove_link(&phy->dev.kobj, "port");
862 /** sas_port_alloc - allocate and initialize a SAS port structure
864 * @parent: parent device
865 * @port_id: port number
867 * Allocates a SAS port structure. It will be added to the device tree
868 * below the device specified by @parent which must be either a Scsi_Host
869 * or a sas_expander_device.
871 * Returns %NULL on error
873 struct sas_port *sas_port_alloc(struct device *parent, int port_id)
875 struct Scsi_Host *shost = dev_to_shost(parent);
876 struct sas_port *port;
878 port = kzalloc(sizeof(*port), GFP_KERNEL);
882 port->port_identifier = port_id;
884 device_initialize(&port->dev);
886 port->dev.parent = get_device(parent);
887 port->dev.release = sas_port_release;
889 mutex_init(&port->phy_list_mutex);
890 INIT_LIST_HEAD(&port->phy_list);
892 if (scsi_is_sas_expander_device(parent)) {
893 struct sas_rphy *rphy = dev_to_rphy(parent);
894 dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
895 rphy->scsi_target_id, port->port_identifier);
897 dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
898 port->port_identifier);
900 transport_setup_device(&port->dev);
904 EXPORT_SYMBOL(sas_port_alloc);
906 /** sas_port_alloc_num - allocate and initialize a SAS port structure
908 * @parent: parent device
910 * Allocates a SAS port structure and a number to go with it. This
911 * interface is really for adapters where the port number has no
912 * meansing, so the sas class should manage them. It will be added to
913 * the device tree below the device specified by @parent which must be
914 * either a Scsi_Host or a sas_expander_device.
916 * Returns %NULL on error
918 struct sas_port *sas_port_alloc_num(struct device *parent)
921 struct Scsi_Host *shost = dev_to_shost(parent);
922 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
924 /* FIXME: use idr for this eventually */
925 mutex_lock(&sas_host->lock);
926 if (scsi_is_sas_expander_device(parent)) {
927 struct sas_rphy *rphy = dev_to_rphy(parent);
928 struct sas_expander_device *exp = rphy_to_expander_device(rphy);
930 index = exp->next_port_id++;
932 index = sas_host->next_port_id++;
933 mutex_unlock(&sas_host->lock);
934 return sas_port_alloc(parent, index);
936 EXPORT_SYMBOL(sas_port_alloc_num);
939 * sas_port_add - add a SAS port to the device hierarchy
940 * @port: port to be added
942 * publishes a port to the rest of the system
944 int sas_port_add(struct sas_port *port)
948 /* No phys should be added until this is made visible */
949 BUG_ON(!list_empty(&port->phy_list));
951 error = device_add(&port->dev);
956 transport_add_device(&port->dev);
957 transport_configure_device(&port->dev);
961 EXPORT_SYMBOL(sas_port_add);
964 * sas_port_free - free a SAS PORT
965 * @port: SAS PORT to free
967 * Frees the specified SAS PORT.
970 * This function must only be called on a PORT that has not
971 * successfully been added using sas_port_add().
973 void sas_port_free(struct sas_port *port)
975 transport_destroy_device(&port->dev);
976 put_device(&port->dev);
978 EXPORT_SYMBOL(sas_port_free);
981 * sas_port_delete - remove SAS PORT
982 * @port: SAS PORT to remove
984 * Removes the specified SAS PORT. If the SAS PORT has an
985 * associated phys, unlink them from the port as well.
987 void sas_port_delete(struct sas_port *port)
989 struct device *dev = &port->dev;
990 struct sas_phy *phy, *tmp_phy;
993 sas_rphy_delete(port->rphy);
997 mutex_lock(&port->phy_list_mutex);
998 list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1000 sas_port_delete_link(port, phy);
1001 list_del_init(&phy->port_siblings);
1003 mutex_unlock(&port->phy_list_mutex);
1005 if (port->is_backlink) {
1006 struct device *parent = port->dev.parent;
1008 sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1009 port->is_backlink = 0;
1012 transport_remove_device(dev);
1014 transport_destroy_device(dev);
1017 EXPORT_SYMBOL(sas_port_delete);
1020 * scsi_is_sas_port - check if a struct device represents a SAS port
1021 * @dev: device to check
1024 * %1 if the device represents a SAS Port, %0 else
1026 int scsi_is_sas_port(const struct device *dev)
1028 return dev->release == sas_port_release;
1030 EXPORT_SYMBOL(scsi_is_sas_port);
1033 * sas_port_get_phy - try to take a reference on a port member
1034 * @port: port to check
1036 struct sas_phy *sas_port_get_phy(struct sas_port *port)
1038 struct sas_phy *phy;
1040 mutex_lock(&port->phy_list_mutex);
1041 if (list_empty(&port->phy_list))
1044 struct list_head *ent = port->phy_list.next;
1046 phy = list_entry(ent, typeof(*phy), port_siblings);
1047 get_device(&phy->dev);
1049 mutex_unlock(&port->phy_list_mutex);
1053 EXPORT_SYMBOL(sas_port_get_phy);
1056 * sas_port_add_phy - add another phy to a port to form a wide port
1057 * @port: port to add the phy to
1060 * When a port is initially created, it is empty (has no phys). All
1061 * ports must have at least one phy to operated, and all wide ports
1062 * must have at least two. The current code makes no difference
1063 * between ports and wide ports, but the only object that can be
1064 * connected to a remote device is a port, so ports must be formed on
1065 * all devices with phys if they're connected to anything.
1067 void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1069 mutex_lock(&port->phy_list_mutex);
1070 if (unlikely(!list_empty(&phy->port_siblings))) {
1071 /* make sure we're already on this port */
1072 struct sas_phy *tmp;
1074 list_for_each_entry(tmp, &port->phy_list, port_siblings)
1077 /* If this trips, you added a phy that was already
1078 * part of a different port */
1079 if (unlikely(tmp != phy)) {
1080 dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1081 dev_name(&phy->dev));
1085 sas_port_create_link(port, phy);
1086 list_add_tail(&phy->port_siblings, &port->phy_list);
1089 mutex_unlock(&port->phy_list_mutex);
1091 EXPORT_SYMBOL(sas_port_add_phy);
1094 * sas_port_delete_phy - remove a phy from a port or wide port
1095 * @port: port to remove the phy from
1096 * @phy: phy to remove
1098 * This operation is used for tearing down ports again. It must be
1099 * done to every port or wide port before calling sas_port_delete.
1101 void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1103 mutex_lock(&port->phy_list_mutex);
1104 sas_port_delete_link(port, phy);
1105 list_del_init(&phy->port_siblings);
1107 mutex_unlock(&port->phy_list_mutex);
1109 EXPORT_SYMBOL(sas_port_delete_phy);
1111 void sas_port_mark_backlink(struct sas_port *port)
1114 struct device *parent = port->dev.parent->parent->parent;
1116 if (port->is_backlink)
1118 port->is_backlink = 1;
1119 res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1125 printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1129 EXPORT_SYMBOL(sas_port_mark_backlink);
1132 * SAS remote PHY attributes.
1135 #define sas_rphy_show_simple(field, name, format_string, cast) \
1137 show_sas_rphy_##name(struct device *dev, \
1138 struct device_attribute *attr, char *buf) \
1140 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1142 return snprintf(buf, 20, format_string, cast rphy->field); \
1145 #define sas_rphy_simple_attr(field, name, format_string, type) \
1146 sas_rphy_show_simple(field, name, format_string, (type)) \
1147 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1148 show_sas_rphy_##name, NULL)
1150 #define sas_rphy_show_protocol(field, name) \
1152 show_sas_rphy_##name(struct device *dev, \
1153 struct device_attribute *attr, char *buf) \
1155 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1158 return snprintf(buf, 20, "none\n"); \
1159 return get_sas_protocol_names(rphy->field, buf); \
1162 #define sas_rphy_protocol_attr(field, name) \
1163 sas_rphy_show_protocol(field, name) \
1164 static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1165 show_sas_rphy_##name, NULL)
1168 show_sas_rphy_device_type(struct device *dev,
1169 struct device_attribute *attr, char *buf)
1171 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1173 if (!rphy->identify.device_type)
1174 return snprintf(buf, 20, "none\n");
1175 return get_sas_device_type_names(
1176 rphy->identify.device_type, buf);
1179 static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1180 show_sas_rphy_device_type, NULL);
1183 show_sas_rphy_enclosure_identifier(struct device *dev,
1184 struct device_attribute *attr, char *buf)
1186 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1187 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1188 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1189 struct sas_internal *i = to_sas_internal(shost->transportt);
1193 error = i->f->get_enclosure_identifier(rphy, &identifier);
1196 return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1199 static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1200 show_sas_rphy_enclosure_identifier, NULL);
1203 show_sas_rphy_bay_identifier(struct device *dev,
1204 struct device_attribute *attr, char *buf)
1206 struct sas_rphy *rphy = transport_class_to_rphy(dev);
1207 struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1208 struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1209 struct sas_internal *i = to_sas_internal(shost->transportt);
1212 val = i->f->get_bay_identifier(rphy);
1215 return sprintf(buf, "%d\n", val);
1218 static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1219 show_sas_rphy_bay_identifier, NULL);
1221 sas_rphy_protocol_attr(identify.initiator_port_protocols,
1222 initiator_port_protocols);
1223 sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1224 sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1225 unsigned long long);
1226 sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
1227 sas_rphy_simple_attr(scsi_target_id, scsi_target_id, "%d\n", u32);
1229 /* only need 8 bytes of data plus header (4 or 8) */
1232 int sas_read_port_mode_page(struct scsi_device *sdev)
1234 char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1235 struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1236 struct scsi_mode_data mode_data;
1242 error = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1248 msdata = buffer + mode_data.header_length +
1249 mode_data.block_descriptor_length;
1251 if (msdata - buffer > BUF_SIZE - 8)
1256 rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1257 rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1258 rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1264 EXPORT_SYMBOL(sas_read_port_mode_page);
1266 static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1267 "sas_end_device", NULL, NULL, NULL);
1269 #define sas_end_dev_show_simple(field, name, format_string, cast) \
1271 show_sas_end_dev_##name(struct device *dev, \
1272 struct device_attribute *attr, char *buf) \
1274 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1275 struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1277 return snprintf(buf, 20, format_string, cast rdev->field); \
1280 #define sas_end_dev_simple_attr(field, name, format_string, type) \
1281 sas_end_dev_show_simple(field, name, format_string, (type)) \
1282 static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1283 show_sas_end_dev_##name, NULL)
1285 sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1286 sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1288 sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1290 sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1292 sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1295 static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1296 "sas_expander", NULL, NULL, NULL);
1298 #define sas_expander_show_simple(field, name, format_string, cast) \
1300 show_sas_expander_##name(struct device *dev, \
1301 struct device_attribute *attr, char *buf) \
1303 struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1304 struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1306 return snprintf(buf, 20, format_string, cast edev->field); \
1309 #define sas_expander_simple_attr(field, name, format_string, type) \
1310 sas_expander_show_simple(field, name, format_string, (type)) \
1311 static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1312 show_sas_expander_##name, NULL)
1314 sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1315 sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1316 sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1317 sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1319 sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1320 sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1322 sas_expander_simple_attr(level, level, "%d\n", int);
1324 static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1325 "sas_device", NULL, NULL, NULL);
1327 static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1329 struct Scsi_Host *shost;
1330 struct sas_internal *i;
1332 if (!scsi_is_sas_rphy(dev))
1334 shost = dev_to_shost(dev->parent->parent);
1336 if (!shost->transportt)
1338 if (shost->transportt->host_attrs.ac.class !=
1339 &sas_host_class.class)
1342 i = to_sas_internal(shost->transportt);
1343 return &i->rphy_attr_cont.ac == cont;
1346 static int sas_end_dev_match(struct attribute_container *cont,
1349 struct Scsi_Host *shost;
1350 struct sas_internal *i;
1351 struct sas_rphy *rphy;
1353 if (!scsi_is_sas_rphy(dev))
1355 shost = dev_to_shost(dev->parent->parent);
1356 rphy = dev_to_rphy(dev);
1358 if (!shost->transportt)
1360 if (shost->transportt->host_attrs.ac.class !=
1361 &sas_host_class.class)
1364 i = to_sas_internal(shost->transportt);
1365 return &i->end_dev_attr_cont.ac == cont &&
1366 rphy->identify.device_type == SAS_END_DEVICE;
1369 static int sas_expander_match(struct attribute_container *cont,
1372 struct Scsi_Host *shost;
1373 struct sas_internal *i;
1374 struct sas_rphy *rphy;
1376 if (!scsi_is_sas_rphy(dev))
1378 shost = dev_to_shost(dev->parent->parent);
1379 rphy = dev_to_rphy(dev);
1381 if (!shost->transportt)
1383 if (shost->transportt->host_attrs.ac.class !=
1384 &sas_host_class.class)
1387 i = to_sas_internal(shost->transportt);
1388 return &i->expander_attr_cont.ac == cont &&
1389 (rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1390 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1393 static void sas_expander_release(struct device *dev)
1395 struct sas_rphy *rphy = dev_to_rphy(dev);
1396 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1398 put_device(dev->parent);
1402 static void sas_end_device_release(struct device *dev)
1404 struct sas_rphy *rphy = dev_to_rphy(dev);
1405 struct sas_end_device *edev = rphy_to_end_device(rphy);
1407 put_device(dev->parent);
1412 * sas_rphy_initialize - common rphy initialization
1413 * @rphy: rphy to initialise
1415 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1416 * initialise the common rphy component of each.
1418 static void sas_rphy_initialize(struct sas_rphy *rphy)
1420 INIT_LIST_HEAD(&rphy->list);
1424 * sas_end_device_alloc - allocate an rphy for an end device
1425 * @parent: which port
1427 * Allocates an SAS remote PHY structure, connected to @parent.
1430 * SAS PHY allocated or %NULL if the allocation failed.
1432 struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1434 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1435 struct sas_end_device *rdev;
1437 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1442 device_initialize(&rdev->rphy.dev);
1443 rdev->rphy.dev.parent = get_device(&parent->dev);
1444 rdev->rphy.dev.release = sas_end_device_release;
1445 if (scsi_is_sas_expander_device(parent->dev.parent)) {
1446 struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1447 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1448 shost->host_no, rphy->scsi_target_id,
1449 parent->port_identifier);
1451 dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1452 shost->host_no, parent->port_identifier);
1453 rdev->rphy.identify.device_type = SAS_END_DEVICE;
1454 sas_rphy_initialize(&rdev->rphy);
1455 transport_setup_device(&rdev->rphy.dev);
1459 EXPORT_SYMBOL(sas_end_device_alloc);
1462 * sas_expander_alloc - allocate an rphy for an end device
1463 * @parent: which port
1464 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1466 * Allocates an SAS remote PHY structure, connected to @parent.
1469 * SAS PHY allocated or %NULL if the allocation failed.
1471 struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1472 enum sas_device_type type)
1474 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1475 struct sas_expander_device *rdev;
1476 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1478 BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1479 type != SAS_FANOUT_EXPANDER_DEVICE);
1481 rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1486 device_initialize(&rdev->rphy.dev);
1487 rdev->rphy.dev.parent = get_device(&parent->dev);
1488 rdev->rphy.dev.release = sas_expander_release;
1489 mutex_lock(&sas_host->lock);
1490 rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1491 mutex_unlock(&sas_host->lock);
1492 dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1493 shost->host_no, rdev->rphy.scsi_target_id);
1494 rdev->rphy.identify.device_type = type;
1495 sas_rphy_initialize(&rdev->rphy);
1496 transport_setup_device(&rdev->rphy.dev);
1500 EXPORT_SYMBOL(sas_expander_alloc);
1503 * sas_rphy_add - add a SAS remote PHY to the device hierarchy
1504 * @rphy: The remote PHY to be added
1506 * Publishes a SAS remote PHY to the rest of the system.
1508 int sas_rphy_add(struct sas_rphy *rphy)
1510 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1511 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1512 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1513 struct sas_identify *identify = &rphy->identify;
1518 parent->rphy = rphy;
1520 error = device_add(&rphy->dev);
1523 transport_add_device(&rphy->dev);
1524 transport_configure_device(&rphy->dev);
1525 if (sas_bsg_initialize(shost, rphy))
1526 printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1529 mutex_lock(&sas_host->lock);
1530 list_add_tail(&rphy->list, &sas_host->rphy_list);
1531 if (identify->device_type == SAS_END_DEVICE &&
1532 (identify->target_port_protocols &
1533 (SAS_PROTOCOL_SSP | SAS_PROTOCOL_STP | SAS_PROTOCOL_SATA)))
1534 rphy->scsi_target_id = sas_host->next_target_id++;
1535 else if (identify->device_type == SAS_END_DEVICE)
1536 rphy->scsi_target_id = -1;
1537 mutex_unlock(&sas_host->lock);
1539 if (identify->device_type == SAS_END_DEVICE &&
1540 rphy->scsi_target_id != -1) {
1543 if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1544 lun = SCAN_WILD_CARD;
1548 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun,
1554 EXPORT_SYMBOL(sas_rphy_add);
1557 * sas_rphy_free - free a SAS remote PHY
1558 * @rphy: SAS remote PHY to free
1560 * Frees the specified SAS remote PHY.
1563 * This function must only be called on a remote
1564 * PHY that has not successfully been added using
1565 * sas_rphy_add() (or has been sas_rphy_remove()'d)
1567 void sas_rphy_free(struct sas_rphy *rphy)
1569 struct device *dev = &rphy->dev;
1570 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1571 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1573 mutex_lock(&sas_host->lock);
1574 list_del(&rphy->list);
1575 mutex_unlock(&sas_host->lock);
1577 transport_destroy_device(dev);
1581 EXPORT_SYMBOL(sas_rphy_free);
1584 * sas_rphy_delete - remove and free SAS remote PHY
1585 * @rphy: SAS remote PHY to remove and free
1587 * Removes the specified SAS remote PHY and frees it.
1590 sas_rphy_delete(struct sas_rphy *rphy)
1592 sas_rphy_remove(rphy);
1593 sas_rphy_free(rphy);
1595 EXPORT_SYMBOL(sas_rphy_delete);
1598 * sas_rphy_unlink - unlink SAS remote PHY
1599 * @rphy: SAS remote phy to unlink from its parent port
1601 * Removes port reference to an rphy
1603 void sas_rphy_unlink(struct sas_rphy *rphy)
1605 struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1607 parent->rphy = NULL;
1609 EXPORT_SYMBOL(sas_rphy_unlink);
1612 * sas_rphy_remove - remove SAS remote PHY
1613 * @rphy: SAS remote phy to remove
1615 * Removes the specified SAS remote PHY.
1618 sas_rphy_remove(struct sas_rphy *rphy)
1620 struct device *dev = &rphy->dev;
1622 switch (rphy->identify.device_type) {
1623 case SAS_END_DEVICE:
1624 scsi_remove_target(dev);
1626 case SAS_EDGE_EXPANDER_DEVICE:
1627 case SAS_FANOUT_EXPANDER_DEVICE:
1628 sas_remove_children(dev);
1634 sas_rphy_unlink(rphy);
1635 bsg_remove_queue(rphy->q);
1636 transport_remove_device(dev);
1639 EXPORT_SYMBOL(sas_rphy_remove);
1642 * scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1643 * @dev: device to check
1646 * %1 if the device represents a SAS remote PHY, %0 else
1648 int scsi_is_sas_rphy(const struct device *dev)
1650 return dev->release == sas_end_device_release ||
1651 dev->release == sas_expander_release;
1653 EXPORT_SYMBOL(scsi_is_sas_rphy);
1660 static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1663 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1664 struct sas_rphy *rphy;
1666 mutex_lock(&sas_host->lock);
1667 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1668 if (rphy->identify.device_type != SAS_END_DEVICE ||
1669 rphy->scsi_target_id == -1)
1672 if ((channel == SCAN_WILD_CARD || channel == 0) &&
1673 (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1674 scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id,
1675 lun, SCSI_SCAN_MANUAL);
1678 mutex_unlock(&sas_host->lock);
1685 * Setup / Teardown code
1688 #define SETUP_TEMPLATE(attrb, field, perm, test) \
1689 i->private_##attrb[count] = dev_attr_##field; \
1690 i->private_##attrb[count].attr.mode = perm; \
1691 i->attrb[count] = &i->private_##attrb[count]; \
1695 #define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1696 i->private_##attrb[count] = dev_attr_##field; \
1697 i->private_##attrb[count].attr.mode = perm; \
1699 i->private_##attrb[count].attr.mode = ro_perm; \
1700 i->private_##attrb[count].store = NULL; \
1702 i->attrb[count] = &i->private_##attrb[count]; \
1706 #define SETUP_RPORT_ATTRIBUTE(field) \
1707 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1709 #define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1710 SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1712 #define SETUP_PHY_ATTRIBUTE(field) \
1713 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1715 #define SETUP_PHY_ATTRIBUTE_RW(field) \
1716 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1717 !i->f->set_phy_speed, S_IRUGO)
1719 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1720 SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1721 !i->f->func, S_IRUGO)
1723 #define SETUP_PORT_ATTRIBUTE(field) \
1724 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1726 #define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1727 SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1729 #define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1730 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1732 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1733 SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1735 #define SETUP_END_DEV_ATTRIBUTE(field) \
1736 SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1738 #define SETUP_EXPANDER_ATTRIBUTE(field) \
1739 SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1742 * sas_attach_transport - instantiate SAS transport template
1743 * @ft: SAS transport class function template
1745 struct scsi_transport_template *
1746 sas_attach_transport(struct sas_function_template *ft)
1748 struct sas_internal *i;
1751 i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1755 i->t.user_scan = sas_user_scan;
1757 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1758 i->t.host_attrs.ac.class = &sas_host_class.class;
1759 i->t.host_attrs.ac.match = sas_host_match;
1760 transport_container_register(&i->t.host_attrs);
1761 i->t.host_size = sizeof(struct sas_host_attrs);
1763 i->phy_attr_cont.ac.class = &sas_phy_class.class;
1764 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1765 i->phy_attr_cont.ac.match = sas_phy_match;
1766 transport_container_register(&i->phy_attr_cont);
1768 i->port_attr_cont.ac.class = &sas_port_class.class;
1769 i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1770 i->port_attr_cont.ac.match = sas_port_match;
1771 transport_container_register(&i->port_attr_cont);
1773 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1774 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1775 i->rphy_attr_cont.ac.match = sas_rphy_match;
1776 transport_container_register(&i->rphy_attr_cont);
1778 i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1779 i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1780 i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1781 transport_container_register(&i->end_dev_attr_cont);
1783 i->expander_attr_cont.ac.class = &sas_expander_class.class;
1784 i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1785 i->expander_attr_cont.ac.match = sas_expander_match;
1786 transport_container_register(&i->expander_attr_cont);
1791 SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1792 SETUP_PHY_ATTRIBUTE(target_port_protocols);
1793 SETUP_PHY_ATTRIBUTE(device_type);
1794 SETUP_PHY_ATTRIBUTE(sas_address);
1795 SETUP_PHY_ATTRIBUTE(phy_identifier);
1796 SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1797 SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1798 SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1799 SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1800 SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1802 SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1803 SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1804 SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1805 SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1806 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1807 SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1808 SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1809 i->phy_attrs[count] = NULL;
1812 SETUP_PORT_ATTRIBUTE(num_phys);
1813 i->port_attrs[count] = NULL;
1816 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1817 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1818 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1819 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1820 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1821 SETUP_RPORT_ATTRIBUTE(rphy_scsi_target_id);
1822 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1823 get_enclosure_identifier);
1824 SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1825 get_bay_identifier);
1826 i->rphy_attrs[count] = NULL;
1829 SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1830 SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1831 SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1832 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1833 SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1834 i->end_dev_attrs[count] = NULL;
1837 SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1838 SETUP_EXPANDER_ATTRIBUTE(product_id);
1839 SETUP_EXPANDER_ATTRIBUTE(product_rev);
1840 SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1841 SETUP_EXPANDER_ATTRIBUTE(component_id);
1842 SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1843 SETUP_EXPANDER_ATTRIBUTE(level);
1844 i->expander_attrs[count] = NULL;
1848 EXPORT_SYMBOL(sas_attach_transport);
1851 * sas_release_transport - release SAS transport template instance
1852 * @t: transport template instance
1854 void sas_release_transport(struct scsi_transport_template *t)
1856 struct sas_internal *i = to_sas_internal(t);
1858 transport_container_unregister(&i->t.host_attrs);
1859 transport_container_unregister(&i->phy_attr_cont);
1860 transport_container_unregister(&i->port_attr_cont);
1861 transport_container_unregister(&i->rphy_attr_cont);
1862 transport_container_unregister(&i->end_dev_attr_cont);
1863 transport_container_unregister(&i->expander_attr_cont);
1867 EXPORT_SYMBOL(sas_release_transport);
1869 static __init int sas_transport_init(void)
1873 error = transport_class_register(&sas_host_class);
1876 error = transport_class_register(&sas_phy_class);
1878 goto out_unregister_transport;
1879 error = transport_class_register(&sas_port_class);
1881 goto out_unregister_phy;
1882 error = transport_class_register(&sas_rphy_class);
1884 goto out_unregister_port;
1885 error = transport_class_register(&sas_end_dev_class);
1887 goto out_unregister_rphy;
1888 error = transport_class_register(&sas_expander_class);
1890 goto out_unregister_end_dev;
1894 out_unregister_end_dev:
1895 transport_class_unregister(&sas_end_dev_class);
1896 out_unregister_rphy:
1897 transport_class_unregister(&sas_rphy_class);
1898 out_unregister_port:
1899 transport_class_unregister(&sas_port_class);
1901 transport_class_unregister(&sas_phy_class);
1902 out_unregister_transport:
1903 transport_class_unregister(&sas_host_class);
1909 static void __exit sas_transport_exit(void)
1911 transport_class_unregister(&sas_host_class);
1912 transport_class_unregister(&sas_phy_class);
1913 transport_class_unregister(&sas_port_class);
1914 transport_class_unregister(&sas_rphy_class);
1915 transport_class_unregister(&sas_end_dev_class);
1916 transport_class_unregister(&sas_expander_class);
1919 MODULE_AUTHOR("Christoph Hellwig");
1920 MODULE_DESCRIPTION("SAS Transport Attributes");
1921 MODULE_LICENSE("GPL");
1923 module_init(sas_transport_init);
1924 module_exit(sas_transport_exit);