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_device.h>
37
#include <scsi/scsi_host.h>
38
#include <scsi/scsi_transport.h>
39
#include <scsi/scsi_transport_sas.h>
41
#include "scsi_sas_internal.h"
42
struct sas_host_attrs {
43
struct list_head rphy_list;
45
struct request_queue *q;
50
#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
54
* Hack to allow attributes of the same name in different objects.
56
#define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
57
struct device_attribute dev_attr_##_prefix##_##_name = \
58
__ATTR(_name,_mode,_show,_store)
62
* Pretty printing helpers
65
#define sas_bitfield_name_match(title, table) \
67
get_sas_##title##_names(u32 table_key, char *buf) \
73
for (i = 0; i < ARRAY_SIZE(table); i++) { \
74
if (table[i].value & table_key) { \
75
len += sprintf(buf + len, "%s%s", \
76
prefix, table[i].name); \
80
len += sprintf(buf + len, "\n"); \
84
#define sas_bitfield_name_set(title, table) \
86
set_sas_##title##_names(u32 *table_key, const char *buf) \
91
for (i = 0; i < ARRAY_SIZE(table); i++) { \
92
len = strlen(table[i].name); \
93
if (strncmp(buf, table[i].name, len) == 0 && \
94
(buf[len] == '\n' || buf[len] == '\0')) { \
95
*table_key = table[i].value; \
102
#define sas_bitfield_name_search(title, table) \
104
get_sas_##title##_names(u32 table_key, char *buf) \
109
for (i = 0; i < ARRAY_SIZE(table); i++) { \
110
if (table[i].value == table_key) { \
111
len += sprintf(buf + len, "%s", \
116
len += sprintf(buf + len, "\n"); \
123
} sas_device_type_names[] = {
124
{ SAS_PHY_UNUSED, "unused" },
125
{ SAS_END_DEVICE, "end device" },
126
{ SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
127
{ SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
129
sas_bitfield_name_search(device_type, sas_device_type_names)
135
} sas_protocol_names[] = {
136
{ SAS_PROTOCOL_SATA, "sata" },
137
{ SAS_PROTOCOL_SMP, "smp" },
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{ SAS_PROTOCOL_STP, "stp" },
139
{ SAS_PROTOCOL_SSP, "ssp" },
141
sas_bitfield_name_match(protocol, sas_protocol_names)
146
} sas_linkspeed_names[] = {
147
{ SAS_LINK_RATE_UNKNOWN, "Unknown" },
148
{ SAS_PHY_DISABLED, "Phy disabled" },
149
{ SAS_LINK_RATE_FAILED, "Link Rate failed" },
150
{ SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
151
{ SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
152
{ SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
153
{ SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
155
sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
156
sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
158
static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
160
struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
161
struct sas_end_device *rdev;
163
BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
165
rdev = rphy_to_end_device(rphy);
169
static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
170
struct sas_rphy *rphy)
174
int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
176
while ((req = blk_fetch_request(q)) != NULL) {
177
spin_unlock_irq(q->queue_lock);
179
handler = to_sas_internal(shost->transportt)->f->smp_handler;
180
ret = handler(shost, rphy, req);
183
blk_end_request_all(req, ret);
185
spin_lock_irq(q->queue_lock);
189
static void sas_host_smp_request(struct request_queue *q)
191
sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
194
static void sas_non_host_smp_request(struct request_queue *q)
196
struct sas_rphy *rphy = q->queuedata;
197
sas_smp_request(q, rphy_to_shost(rphy), rphy);
200
static void sas_host_release(struct device *dev)
202
struct Scsi_Host *shost = dev_to_shost(dev);
203
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
204
struct request_queue *q = sas_host->q;
207
blk_cleanup_queue(q);
210
static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
212
struct request_queue *q;
217
void (*release)(struct device *);
219
if (!to_sas_internal(shost->transportt)->f->smp_handler) {
220
printk("%s can't handle SMP requests\n", shost->hostt->name);
225
q = blk_init_queue(sas_non_host_smp_request, NULL);
227
name = dev_name(dev);
230
q = blk_init_queue(sas_host_smp_request, NULL);
231
dev = &shost->shost_gendev;
232
snprintf(namebuf, sizeof(namebuf),
233
"sas_host%d", shost->host_no);
235
release = sas_host_release;
240
error = bsg_register_queue(q, dev, name, release);
242
blk_cleanup_queue(q);
249
to_sas_host_attrs(shost)->q = q;
254
q->queuedata = shost;
256
queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
260
static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
262
struct request_queue *q;
267
q = to_sas_host_attrs(shost)->q;
272
bsg_unregister_queue(q);
276
* SAS host attributes
279
static int sas_host_setup(struct transport_container *tc, struct device *dev,
282
struct Scsi_Host *shost = dev_to_shost(dev);
283
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
285
INIT_LIST_HEAD(&sas_host->rphy_list);
286
mutex_init(&sas_host->lock);
287
sas_host->next_target_id = 0;
288
sas_host->next_expander_id = 0;
289
sas_host->next_port_id = 0;
291
if (sas_bsg_initialize(shost, NULL))
292
dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
298
static int sas_host_remove(struct transport_container *tc, struct device *dev,
301
struct Scsi_Host *shost = dev_to_shost(dev);
303
sas_bsg_remove(shost, NULL);
308
static DECLARE_TRANSPORT_CLASS(sas_host_class,
309
"sas_host", sas_host_setup, sas_host_remove, NULL);
311
static int sas_host_match(struct attribute_container *cont,
314
struct Scsi_Host *shost;
315
struct sas_internal *i;
317
if (!scsi_is_host_device(dev))
319
shost = dev_to_shost(dev);
321
if (!shost->transportt)
323
if (shost->transportt->host_attrs.ac.class !=
324
&sas_host_class.class)
327
i = to_sas_internal(shost->transportt);
328
return &i->t.host_attrs.ac == cont;
331
static int do_sas_phy_delete(struct device *dev, void *data)
333
int pass = (int)(unsigned long)data;
335
if (pass == 0 && scsi_is_sas_port(dev))
336
sas_port_delete(dev_to_sas_port(dev));
337
else if (pass == 1 && scsi_is_sas_phy(dev))
338
sas_phy_delete(dev_to_phy(dev));
343
* sas_remove_children - tear down a devices SAS data structures
344
* @dev: device belonging to the sas object
346
* Removes all SAS PHYs and remote PHYs for a given object
348
void sas_remove_children(struct device *dev)
350
device_for_each_child(dev, (void *)0, do_sas_phy_delete);
351
device_for_each_child(dev, (void *)1, do_sas_phy_delete);
353
EXPORT_SYMBOL(sas_remove_children);
356
* sas_remove_host - tear down a Scsi_Host's SAS data structures
357
* @shost: Scsi Host that is torn down
359
* Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
360
* Must be called just before scsi_remove_host for SAS HBAs.
362
void sas_remove_host(struct Scsi_Host *shost)
364
sas_remove_children(&shost->shost_gendev);
366
EXPORT_SYMBOL(sas_remove_host);
369
* sas_tlr_supported - checking TLR bit in vpd 0x90
370
* @sdev: scsi device struct
372
* Check Transport Layer Retries are supported or not.
373
* If vpd page 0x90 is present, TRL is supported.
377
sas_tlr_supported(struct scsi_device *sdev)
379
const int vpd_len = 32;
380
struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
381
char *buffer = kzalloc(vpd_len, GFP_KERNEL);
384
if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
388
* Magic numbers: the VPD Protocol page (0x90)
389
* has a 4 byte header and then one entry per device port
390
* the TLR bit is at offset 8 on each port entry
391
* if we take the first port, that's at total offset 12
393
ret = buffer[12] & 0x01;
397
rdev->tlr_supported = ret;
401
EXPORT_SYMBOL_GPL(sas_tlr_supported);
404
* sas_disable_tlr - setting TLR flags
405
* @sdev: scsi device struct
407
* Seting tlr_enabled flag to 0.
411
sas_disable_tlr(struct scsi_device *sdev)
413
struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
415
rdev->tlr_enabled = 0;
417
EXPORT_SYMBOL_GPL(sas_disable_tlr);
420
* sas_enable_tlr - setting TLR flags
421
* @sdev: scsi device struct
423
* Seting tlr_enabled flag 1.
426
void sas_enable_tlr(struct scsi_device *sdev)
428
unsigned int tlr_supported = 0;
429
tlr_supported = sas_tlr_supported(sdev);
432
struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
434
rdev->tlr_enabled = 1;
439
EXPORT_SYMBOL_GPL(sas_enable_tlr);
441
unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
443
struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
444
return rdev->tlr_enabled;
446
EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
452
#define sas_phy_show_simple(field, name, format_string, cast) \
454
show_sas_phy_##name(struct device *dev, \
455
struct device_attribute *attr, char *buf) \
457
struct sas_phy *phy = transport_class_to_phy(dev); \
459
return snprintf(buf, 20, format_string, cast phy->field); \
462
#define sas_phy_simple_attr(field, name, format_string, type) \
463
sas_phy_show_simple(field, name, format_string, (type)) \
464
static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
466
#define sas_phy_show_protocol(field, name) \
468
show_sas_phy_##name(struct device *dev, \
469
struct device_attribute *attr, char *buf) \
471
struct sas_phy *phy = transport_class_to_phy(dev); \
474
return snprintf(buf, 20, "none\n"); \
475
return get_sas_protocol_names(phy->field, buf); \
478
#define sas_phy_protocol_attr(field, name) \
479
sas_phy_show_protocol(field, name) \
480
static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
482
#define sas_phy_show_linkspeed(field) \
484
show_sas_phy_##field(struct device *dev, \
485
struct device_attribute *attr, char *buf) \
487
struct sas_phy *phy = transport_class_to_phy(dev); \
489
return get_sas_linkspeed_names(phy->field, buf); \
492
/* Fudge to tell if we're minimum or maximum */
493
#define sas_phy_store_linkspeed(field) \
495
store_sas_phy_##field(struct device *dev, \
496
struct device_attribute *attr, \
497
const char *buf, size_t count) \
499
struct sas_phy *phy = transport_class_to_phy(dev); \
500
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
501
struct sas_internal *i = to_sas_internal(shost->transportt); \
503
struct sas_phy_linkrates rates = {0}; \
506
error = set_sas_linkspeed_names(&value, buf); \
509
rates.field = value; \
510
error = i->f->set_phy_speed(phy, &rates); \
512
return error ? error : count; \
515
#define sas_phy_linkspeed_rw_attr(field) \
516
sas_phy_show_linkspeed(field) \
517
sas_phy_store_linkspeed(field) \
518
static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
519
store_sas_phy_##field)
521
#define sas_phy_linkspeed_attr(field) \
522
sas_phy_show_linkspeed(field) \
523
static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
526
#define sas_phy_show_linkerror(field) \
528
show_sas_phy_##field(struct device *dev, \
529
struct device_attribute *attr, char *buf) \
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); \
536
error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
539
return snprintf(buf, 20, "%u\n", phy->field); \
542
#define sas_phy_linkerror_attr(field) \
543
sas_phy_show_linkerror(field) \
544
static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
548
show_sas_device_type(struct device *dev,
549
struct device_attribute *attr, char *buf)
551
struct sas_phy *phy = transport_class_to_phy(dev);
553
if (!phy->identify.device_type)
554
return snprintf(buf, 20, "none\n");
555
return get_sas_device_type_names(phy->identify.device_type, buf);
557
static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
559
static ssize_t do_sas_phy_enable(struct device *dev,
560
size_t count, int enable)
562
struct sas_phy *phy = transport_class_to_phy(dev);
563
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
564
struct sas_internal *i = to_sas_internal(shost->transportt);
567
error = i->f->phy_enable(phy, enable);
570
phy->enabled = enable;
575
store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
576
const char *buf, size_t count)
583
do_sas_phy_enable(dev, count, 0);
586
do_sas_phy_enable(dev, count, 1);
596
show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
599
struct sas_phy *phy = transport_class_to_phy(dev);
601
return snprintf(buf, 20, "%d", phy->enabled);
604
static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
605
store_sas_phy_enable);
608
do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
610
struct sas_phy *phy = transport_class_to_phy(dev);
611
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
612
struct sas_internal *i = to_sas_internal(shost->transportt);
615
error = i->f->phy_reset(phy, hard_reset);
622
store_sas_link_reset(struct device *dev, struct device_attribute *attr,
623
const char *buf, size_t count)
625
return do_sas_phy_reset(dev, count, 0);
627
static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
630
store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
631
const char *buf, size_t count)
633
return do_sas_phy_reset(dev, count, 1);
635
static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
637
sas_phy_protocol_attr(identify.initiator_port_protocols,
638
initiator_port_protocols);
639
sas_phy_protocol_attr(identify.target_port_protocols,
640
target_port_protocols);
641
sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
643
sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
644
//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
645
sas_phy_linkspeed_attr(negotiated_linkrate);
646
sas_phy_linkspeed_attr(minimum_linkrate_hw);
647
sas_phy_linkspeed_rw_attr(minimum_linkrate);
648
sas_phy_linkspeed_attr(maximum_linkrate_hw);
649
sas_phy_linkspeed_rw_attr(maximum_linkrate);
650
sas_phy_linkerror_attr(invalid_dword_count);
651
sas_phy_linkerror_attr(running_disparity_error_count);
652
sas_phy_linkerror_attr(loss_of_dword_sync_count);
653
sas_phy_linkerror_attr(phy_reset_problem_count);
656
static DECLARE_TRANSPORT_CLASS(sas_phy_class,
657
"sas_phy", NULL, NULL, NULL);
659
static int sas_phy_match(struct attribute_container *cont, struct device *dev)
661
struct Scsi_Host *shost;
662
struct sas_internal *i;
664
if (!scsi_is_sas_phy(dev))
666
shost = dev_to_shost(dev->parent);
668
if (!shost->transportt)
670
if (shost->transportt->host_attrs.ac.class !=
671
&sas_host_class.class)
674
i = to_sas_internal(shost->transportt);
675
return &i->phy_attr_cont.ac == cont;
678
static void sas_phy_release(struct device *dev)
680
struct sas_phy *phy = dev_to_phy(dev);
682
put_device(dev->parent);
687
* sas_phy_alloc - allocates and initialize a SAS PHY structure
688
* @parent: Parent device
691
* Allocates an SAS PHY structure. It will be added in the device tree
692
* below the device specified by @parent, which has to be either a Scsi_Host
696
* SAS PHY allocated or %NULL if the allocation failed.
698
struct sas_phy *sas_phy_alloc(struct device *parent, int number)
700
struct Scsi_Host *shost = dev_to_shost(parent);
703
phy = kzalloc(sizeof(*phy), GFP_KERNEL);
707
phy->number = number;
710
device_initialize(&phy->dev);
711
phy->dev.parent = get_device(parent);
712
phy->dev.release = sas_phy_release;
713
INIT_LIST_HEAD(&phy->port_siblings);
714
if (scsi_is_sas_expander_device(parent)) {
715
struct sas_rphy *rphy = dev_to_rphy(parent);
716
dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
717
rphy->scsi_target_id, number);
719
dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
721
transport_setup_device(&phy->dev);
725
EXPORT_SYMBOL(sas_phy_alloc);
728
* sas_phy_add - add a SAS PHY to the device hierarchy
729
* @phy: The PHY to be added
731
* Publishes a SAS PHY to the rest of the system.
733
int sas_phy_add(struct sas_phy *phy)
737
error = device_add(&phy->dev);
739
transport_add_device(&phy->dev);
740
transport_configure_device(&phy->dev);
745
EXPORT_SYMBOL(sas_phy_add);
748
* sas_phy_free - free a SAS PHY
749
* @phy: SAS PHY to free
751
* Frees the specified SAS PHY.
754
* This function must only be called on a PHY that has not
755
* successfully been added using sas_phy_add().
757
void sas_phy_free(struct sas_phy *phy)
759
transport_destroy_device(&phy->dev);
760
put_device(&phy->dev);
762
EXPORT_SYMBOL(sas_phy_free);
765
* sas_phy_delete - remove SAS PHY
766
* @phy: SAS PHY to remove
768
* Removes the specified SAS PHY. If the SAS PHY has an
769
* associated remote PHY it is removed before.
772
sas_phy_delete(struct sas_phy *phy)
774
struct device *dev = &phy->dev;
776
/* this happens if the phy is still part of a port when deleted */
777
BUG_ON(!list_empty(&phy->port_siblings));
779
transport_remove_device(dev);
781
transport_destroy_device(dev);
784
EXPORT_SYMBOL(sas_phy_delete);
787
* scsi_is_sas_phy - check if a struct device represents a SAS PHY
788
* @dev: device to check
791
* %1 if the device represents a SAS PHY, %0 else
793
int scsi_is_sas_phy(const struct device *dev)
795
return dev->release == sas_phy_release;
797
EXPORT_SYMBOL(scsi_is_sas_phy);
800
* SAS Port attributes
802
#define sas_port_show_simple(field, name, format_string, cast) \
804
show_sas_port_##name(struct device *dev, \
805
struct device_attribute *attr, char *buf) \
807
struct sas_port *port = transport_class_to_sas_port(dev); \
809
return snprintf(buf, 20, format_string, cast port->field); \
812
#define sas_port_simple_attr(field, name, format_string, type) \
813
sas_port_show_simple(field, name, format_string, (type)) \
814
static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
816
sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
818
static DECLARE_TRANSPORT_CLASS(sas_port_class,
819
"sas_port", NULL, NULL, NULL);
821
static int sas_port_match(struct attribute_container *cont, struct device *dev)
823
struct Scsi_Host *shost;
824
struct sas_internal *i;
826
if (!scsi_is_sas_port(dev))
828
shost = dev_to_shost(dev->parent);
830
if (!shost->transportt)
832
if (shost->transportt->host_attrs.ac.class !=
833
&sas_host_class.class)
836
i = to_sas_internal(shost->transportt);
837
return &i->port_attr_cont.ac == cont;
841
static void sas_port_release(struct device *dev)
843
struct sas_port *port = dev_to_sas_port(dev);
845
BUG_ON(!list_empty(&port->phy_list));
847
put_device(dev->parent);
851
static void sas_port_create_link(struct sas_port *port,
856
res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
857
dev_name(&phy->dev));
860
res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
865
printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
869
static void sas_port_delete_link(struct sas_port *port,
872
sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
873
sysfs_remove_link(&phy->dev.kobj, "port");
876
/** sas_port_alloc - allocate and initialize a SAS port structure
878
* @parent: parent device
879
* @port_id: port number
881
* Allocates a SAS port structure. It will be added to the device tree
882
* below the device specified by @parent which must be either a Scsi_Host
883
* or a sas_expander_device.
885
* Returns %NULL on error
887
struct sas_port *sas_port_alloc(struct device *parent, int port_id)
889
struct Scsi_Host *shost = dev_to_shost(parent);
890
struct sas_port *port;
892
port = kzalloc(sizeof(*port), GFP_KERNEL);
896
port->port_identifier = port_id;
898
device_initialize(&port->dev);
900
port->dev.parent = get_device(parent);
901
port->dev.release = sas_port_release;
903
mutex_init(&port->phy_list_mutex);
904
INIT_LIST_HEAD(&port->phy_list);
906
if (scsi_is_sas_expander_device(parent)) {
907
struct sas_rphy *rphy = dev_to_rphy(parent);
908
dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
909
rphy->scsi_target_id, port->port_identifier);
911
dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
912
port->port_identifier);
914
transport_setup_device(&port->dev);
918
EXPORT_SYMBOL(sas_port_alloc);
920
/** sas_port_alloc_num - allocate and initialize a SAS port structure
922
* @parent: parent device
924
* Allocates a SAS port structure and a number to go with it. This
925
* interface is really for adapters where the port number has no
926
* meansing, so the sas class should manage them. It will be added to
927
* the device tree below the device specified by @parent which must be
928
* either a Scsi_Host or a sas_expander_device.
930
* Returns %NULL on error
932
struct sas_port *sas_port_alloc_num(struct device *parent)
935
struct Scsi_Host *shost = dev_to_shost(parent);
936
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
938
/* FIXME: use idr for this eventually */
939
mutex_lock(&sas_host->lock);
940
if (scsi_is_sas_expander_device(parent)) {
941
struct sas_rphy *rphy = dev_to_rphy(parent);
942
struct sas_expander_device *exp = rphy_to_expander_device(rphy);
944
index = exp->next_port_id++;
946
index = sas_host->next_port_id++;
947
mutex_unlock(&sas_host->lock);
948
return sas_port_alloc(parent, index);
950
EXPORT_SYMBOL(sas_port_alloc_num);
953
* sas_port_add - add a SAS port to the device hierarchy
954
* @port: port to be added
956
* publishes a port to the rest of the system
958
int sas_port_add(struct sas_port *port)
962
/* No phys should be added until this is made visible */
963
BUG_ON(!list_empty(&port->phy_list));
965
error = device_add(&port->dev);
970
transport_add_device(&port->dev);
971
transport_configure_device(&port->dev);
975
EXPORT_SYMBOL(sas_port_add);
978
* sas_port_free - free a SAS PORT
979
* @port: SAS PORT to free
981
* Frees the specified SAS PORT.
984
* This function must only be called on a PORT that has not
985
* successfully been added using sas_port_add().
987
void sas_port_free(struct sas_port *port)
989
transport_destroy_device(&port->dev);
990
put_device(&port->dev);
992
EXPORT_SYMBOL(sas_port_free);
995
* sas_port_delete - remove SAS PORT
996
* @port: SAS PORT to remove
998
* Removes the specified SAS PORT. If the SAS PORT has an
999
* associated phys, unlink them from the port as well.
1001
void sas_port_delete(struct sas_port *port)
1003
struct device *dev = &port->dev;
1004
struct sas_phy *phy, *tmp_phy;
1007
sas_rphy_delete(port->rphy);
1011
mutex_lock(&port->phy_list_mutex);
1012
list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1014
sas_port_delete_link(port, phy);
1015
list_del_init(&phy->port_siblings);
1017
mutex_unlock(&port->phy_list_mutex);
1019
if (port->is_backlink) {
1020
struct device *parent = port->dev.parent;
1022
sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1023
port->is_backlink = 0;
1026
transport_remove_device(dev);
1028
transport_destroy_device(dev);
1031
EXPORT_SYMBOL(sas_port_delete);
1034
* scsi_is_sas_port - check if a struct device represents a SAS port
1035
* @dev: device to check
1038
* %1 if the device represents a SAS Port, %0 else
1040
int scsi_is_sas_port(const struct device *dev)
1042
return dev->release == sas_port_release;
1044
EXPORT_SYMBOL(scsi_is_sas_port);
1047
* sas_port_add_phy - add another phy to a port to form a wide port
1048
* @port: port to add the phy to
1051
* When a port is initially created, it is empty (has no phys). All
1052
* ports must have at least one phy to operated, and all wide ports
1053
* must have at least two. The current code makes no difference
1054
* between ports and wide ports, but the only object that can be
1055
* connected to a remote device is a port, so ports must be formed on
1056
* all devices with phys if they're connected to anything.
1058
void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1060
mutex_lock(&port->phy_list_mutex);
1061
if (unlikely(!list_empty(&phy->port_siblings))) {
1062
/* make sure we're already on this port */
1063
struct sas_phy *tmp;
1065
list_for_each_entry(tmp, &port->phy_list, port_siblings)
1068
/* If this trips, you added a phy that was already
1069
* part of a different port */
1070
if (unlikely(tmp != phy)) {
1071
dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1072
dev_name(&phy->dev));
1076
sas_port_create_link(port, phy);
1077
list_add_tail(&phy->port_siblings, &port->phy_list);
1080
mutex_unlock(&port->phy_list_mutex);
1082
EXPORT_SYMBOL(sas_port_add_phy);
1085
* sas_port_delete_phy - remove a phy from a port or wide port
1086
* @port: port to remove the phy from
1087
* @phy: phy to remove
1089
* This operation is used for tearing down ports again. It must be
1090
* done to every port or wide port before calling sas_port_delete.
1092
void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1094
mutex_lock(&port->phy_list_mutex);
1095
sas_port_delete_link(port, phy);
1096
list_del_init(&phy->port_siblings);
1098
mutex_unlock(&port->phy_list_mutex);
1100
EXPORT_SYMBOL(sas_port_delete_phy);
1102
void sas_port_mark_backlink(struct sas_port *port)
1105
struct device *parent = port->dev.parent->parent->parent;
1107
if (port->is_backlink)
1109
port->is_backlink = 1;
1110
res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1116
printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1120
EXPORT_SYMBOL(sas_port_mark_backlink);
1123
* SAS remote PHY attributes.
1126
#define sas_rphy_show_simple(field, name, format_string, cast) \
1128
show_sas_rphy_##name(struct device *dev, \
1129
struct device_attribute *attr, char *buf) \
1131
struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1133
return snprintf(buf, 20, format_string, cast rphy->field); \
1136
#define sas_rphy_simple_attr(field, name, format_string, type) \
1137
sas_rphy_show_simple(field, name, format_string, (type)) \
1138
static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1139
show_sas_rphy_##name, NULL)
1141
#define sas_rphy_show_protocol(field, name) \
1143
show_sas_rphy_##name(struct device *dev, \
1144
struct device_attribute *attr, char *buf) \
1146
struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1149
return snprintf(buf, 20, "none\n"); \
1150
return get_sas_protocol_names(rphy->field, buf); \
1153
#define sas_rphy_protocol_attr(field, name) \
1154
sas_rphy_show_protocol(field, name) \
1155
static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, \
1156
show_sas_rphy_##name, NULL)
1159
show_sas_rphy_device_type(struct device *dev,
1160
struct device_attribute *attr, char *buf)
1162
struct sas_rphy *rphy = transport_class_to_rphy(dev);
1164
if (!rphy->identify.device_type)
1165
return snprintf(buf, 20, "none\n");
1166
return get_sas_device_type_names(
1167
rphy->identify.device_type, buf);
1170
static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1171
show_sas_rphy_device_type, NULL);
1174
show_sas_rphy_enclosure_identifier(struct device *dev,
1175
struct device_attribute *attr, char *buf)
1177
struct sas_rphy *rphy = transport_class_to_rphy(dev);
1178
struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1179
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1180
struct sas_internal *i = to_sas_internal(shost->transportt);
1185
* Only devices behind an expander are supported, because the
1186
* enclosure identifier is a SMP feature.
1188
if (scsi_is_sas_phy_local(phy))
1191
error = i->f->get_enclosure_identifier(rphy, &identifier);
1194
return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1197
static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1198
show_sas_rphy_enclosure_identifier, NULL);
1201
show_sas_rphy_bay_identifier(struct device *dev,
1202
struct device_attribute *attr, char *buf)
1204
struct sas_rphy *rphy = transport_class_to_rphy(dev);
1205
struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1206
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1207
struct sas_internal *i = to_sas_internal(shost->transportt);
1210
if (scsi_is_sas_phy_local(phy))
1213
val = i->f->get_bay_identifier(rphy);
1216
return sprintf(buf, "%d\n", val);
1219
static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1220
show_sas_rphy_bay_identifier, NULL);
1222
sas_rphy_protocol_attr(identify.initiator_port_protocols,
1223
initiator_port_protocols);
1224
sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1225
sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1226
unsigned long long);
1227
sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
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
res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1246
if (!scsi_status_is_good(res))
1249
msdata = buffer + mode_data.header_length +
1250
mode_data.block_descriptor_length;
1252
if (msdata - buffer > BUF_SIZE - 8)
1257
rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1258
rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1259
rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1265
EXPORT_SYMBOL(sas_read_port_mode_page);
1267
static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1268
"sas_end_device", NULL, NULL, NULL);
1270
#define sas_end_dev_show_simple(field, name, format_string, cast) \
1272
show_sas_end_dev_##name(struct device *dev, \
1273
struct device_attribute *attr, char *buf) \
1275
struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1276
struct sas_end_device *rdev = rphy_to_end_device(rphy); \
1278
return snprintf(buf, 20, format_string, cast rdev->field); \
1281
#define sas_end_dev_simple_attr(field, name, format_string, type) \
1282
sas_end_dev_show_simple(field, name, format_string, (type)) \
1283
static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
1284
show_sas_end_dev_##name, NULL)
1286
sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1287
sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1289
sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1291
sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1293
sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1296
static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1297
"sas_expander", NULL, NULL, NULL);
1299
#define sas_expander_show_simple(field, name, format_string, cast) \
1301
show_sas_expander_##name(struct device *dev, \
1302
struct device_attribute *attr, char *buf) \
1304
struct sas_rphy *rphy = transport_class_to_rphy(dev); \
1305
struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1307
return snprintf(buf, 20, format_string, cast edev->field); \
1310
#define sas_expander_simple_attr(field, name, format_string, type) \
1311
sas_expander_show_simple(field, name, format_string, (type)) \
1312
static SAS_DEVICE_ATTR(expander, name, S_IRUGO, \
1313
show_sas_expander_##name, NULL)
1315
sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1316
sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1317
sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1318
sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1320
sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1321
sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1323
sas_expander_simple_attr(level, level, "%d\n", int);
1325
static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1326
"sas_device", NULL, NULL, NULL);
1328
static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1330
struct Scsi_Host *shost;
1331
struct sas_internal *i;
1333
if (!scsi_is_sas_rphy(dev))
1335
shost = dev_to_shost(dev->parent->parent);
1337
if (!shost->transportt)
1339
if (shost->transportt->host_attrs.ac.class !=
1340
&sas_host_class.class)
1343
i = to_sas_internal(shost->transportt);
1344
return &i->rphy_attr_cont.ac == cont;
1347
static int sas_end_dev_match(struct attribute_container *cont,
1350
struct Scsi_Host *shost;
1351
struct sas_internal *i;
1352
struct sas_rphy *rphy;
1354
if (!scsi_is_sas_rphy(dev))
1356
shost = dev_to_shost(dev->parent->parent);
1357
rphy = dev_to_rphy(dev);
1359
if (!shost->transportt)
1361
if (shost->transportt->host_attrs.ac.class !=
1362
&sas_host_class.class)
1365
i = to_sas_internal(shost->transportt);
1366
return &i->end_dev_attr_cont.ac == cont &&
1367
rphy->identify.device_type == SAS_END_DEVICE;
1370
static int sas_expander_match(struct attribute_container *cont,
1373
struct Scsi_Host *shost;
1374
struct sas_internal *i;
1375
struct sas_rphy *rphy;
1377
if (!scsi_is_sas_rphy(dev))
1379
shost = dev_to_shost(dev->parent->parent);
1380
rphy = dev_to_rphy(dev);
1382
if (!shost->transportt)
1384
if (shost->transportt->host_attrs.ac.class !=
1385
&sas_host_class.class)
1388
i = to_sas_internal(shost->transportt);
1389
return &i->expander_attr_cont.ac == cont &&
1390
(rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1391
rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1394
static void sas_expander_release(struct device *dev)
1396
struct sas_rphy *rphy = dev_to_rphy(dev);
1397
struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1400
blk_cleanup_queue(rphy->q);
1402
put_device(dev->parent);
1406
static void sas_end_device_release(struct device *dev)
1408
struct sas_rphy *rphy = dev_to_rphy(dev);
1409
struct sas_end_device *edev = rphy_to_end_device(rphy);
1412
blk_cleanup_queue(rphy->q);
1414
put_device(dev->parent);
1419
* sas_rphy_initialize - common rphy intialization
1420
* @rphy: rphy to initialise
1422
* Used by both sas_end_device_alloc() and sas_expander_alloc() to
1423
* initialise the common rphy component of each.
1425
static void sas_rphy_initialize(struct sas_rphy *rphy)
1427
INIT_LIST_HEAD(&rphy->list);
1431
* sas_end_device_alloc - allocate an rphy for an end device
1432
* @parent: which port
1434
* Allocates an SAS remote PHY structure, connected to @parent.
1437
* SAS PHY allocated or %NULL if the allocation failed.
1439
struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1441
struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1442
struct sas_end_device *rdev;
1444
rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1449
device_initialize(&rdev->rphy.dev);
1450
rdev->rphy.dev.parent = get_device(&parent->dev);
1451
rdev->rphy.dev.release = sas_end_device_release;
1452
if (scsi_is_sas_expander_device(parent->dev.parent)) {
1453
struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1454
dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1455
shost->host_no, rphy->scsi_target_id,
1456
parent->port_identifier);
1458
dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1459
shost->host_no, parent->port_identifier);
1460
rdev->rphy.identify.device_type = SAS_END_DEVICE;
1461
sas_rphy_initialize(&rdev->rphy);
1462
transport_setup_device(&rdev->rphy.dev);
1466
EXPORT_SYMBOL(sas_end_device_alloc);
1469
* sas_expander_alloc - allocate an rphy for an end device
1470
* @parent: which port
1471
* @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1473
* Allocates an SAS remote PHY structure, connected to @parent.
1476
* SAS PHY allocated or %NULL if the allocation failed.
1478
struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1479
enum sas_device_type type)
1481
struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1482
struct sas_expander_device *rdev;
1483
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1485
BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1486
type != SAS_FANOUT_EXPANDER_DEVICE);
1488
rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1493
device_initialize(&rdev->rphy.dev);
1494
rdev->rphy.dev.parent = get_device(&parent->dev);
1495
rdev->rphy.dev.release = sas_expander_release;
1496
mutex_lock(&sas_host->lock);
1497
rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1498
mutex_unlock(&sas_host->lock);
1499
dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1500
shost->host_no, rdev->rphy.scsi_target_id);
1501
rdev->rphy.identify.device_type = type;
1502
sas_rphy_initialize(&rdev->rphy);
1503
transport_setup_device(&rdev->rphy.dev);
1507
EXPORT_SYMBOL(sas_expander_alloc);
1510
* sas_rphy_add - add a SAS remote PHY to the device hierarchy
1511
* @rphy: The remote PHY to be added
1513
* Publishes a SAS remote PHY to the rest of the system.
1515
int sas_rphy_add(struct sas_rphy *rphy)
1517
struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1518
struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1519
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1520
struct sas_identify *identify = &rphy->identify;
1525
parent->rphy = rphy;
1527
error = device_add(&rphy->dev);
1530
transport_add_device(&rphy->dev);
1531
transport_configure_device(&rphy->dev);
1532
if (sas_bsg_initialize(shost, rphy))
1533
printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1536
mutex_lock(&sas_host->lock);
1537
list_add_tail(&rphy->list, &sas_host->rphy_list);
1538
if (identify->device_type == SAS_END_DEVICE &&
1539
(identify->target_port_protocols &
1540
(SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1541
rphy->scsi_target_id = sas_host->next_target_id++;
1542
else if (identify->device_type == SAS_END_DEVICE)
1543
rphy->scsi_target_id = -1;
1544
mutex_unlock(&sas_host->lock);
1546
if (identify->device_type == SAS_END_DEVICE &&
1547
rphy->scsi_target_id != -1) {
1550
if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1551
lun = SCAN_WILD_CARD;
1555
scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
1560
EXPORT_SYMBOL(sas_rphy_add);
1563
* sas_rphy_free - free a SAS remote PHY
1564
* @rphy: SAS remote PHY to free
1566
* Frees the specified SAS remote PHY.
1569
* This function must only be called on a remote
1570
* PHY that has not successfully been added using
1571
* sas_rphy_add() (or has been sas_rphy_remove()'d)
1573
void sas_rphy_free(struct sas_rphy *rphy)
1575
struct device *dev = &rphy->dev;
1576
struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1577
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1579
mutex_lock(&sas_host->lock);
1580
list_del(&rphy->list);
1581
mutex_unlock(&sas_host->lock);
1583
sas_bsg_remove(shost, rphy);
1585
transport_destroy_device(dev);
1589
EXPORT_SYMBOL(sas_rphy_free);
1592
* sas_rphy_delete - remove and free SAS remote PHY
1593
* @rphy: SAS remote PHY to remove and free
1595
* Removes the specified SAS remote PHY and frees it.
1598
sas_rphy_delete(struct sas_rphy *rphy)
1600
sas_rphy_remove(rphy);
1601
sas_rphy_free(rphy);
1603
EXPORT_SYMBOL(sas_rphy_delete);
1606
* sas_rphy_remove - remove SAS remote PHY
1607
* @rphy: SAS remote phy to remove
1609
* Removes the specified SAS remote PHY.
1612
sas_rphy_remove(struct sas_rphy *rphy)
1614
struct device *dev = &rphy->dev;
1615
struct sas_port *parent = dev_to_sas_port(dev->parent);
1617
switch (rphy->identify.device_type) {
1618
case SAS_END_DEVICE:
1619
scsi_remove_target(dev);
1621
case SAS_EDGE_EXPANDER_DEVICE:
1622
case SAS_FANOUT_EXPANDER_DEVICE:
1623
sas_remove_children(dev);
1629
transport_remove_device(dev);
1632
parent->rphy = NULL;
1634
EXPORT_SYMBOL(sas_rphy_remove);
1637
* scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
1638
* @dev: device to check
1641
* %1 if the device represents a SAS remote PHY, %0 else
1643
int scsi_is_sas_rphy(const struct device *dev)
1645
return dev->release == sas_end_device_release ||
1646
dev->release == sas_expander_release;
1648
EXPORT_SYMBOL(scsi_is_sas_rphy);
1655
static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1658
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1659
struct sas_rphy *rphy;
1661
mutex_lock(&sas_host->lock);
1662
list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1663
if (rphy->identify.device_type != SAS_END_DEVICE ||
1664
rphy->scsi_target_id == -1)
1667
if ((channel == SCAN_WILD_CARD || channel == 0) &&
1668
(id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1669
scsi_scan_target(&rphy->dev, 0,
1670
rphy->scsi_target_id, lun, 1);
1673
mutex_unlock(&sas_host->lock);
1680
* Setup / Teardown code
1683
#define SETUP_TEMPLATE(attrb, field, perm, test) \
1684
i->private_##attrb[count] = dev_attr_##field; \
1685
i->private_##attrb[count].attr.mode = perm; \
1686
i->attrb[count] = &i->private_##attrb[count]; \
1690
#define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
1691
i->private_##attrb[count] = dev_attr_##field; \
1692
i->private_##attrb[count].attr.mode = perm; \
1694
i->private_##attrb[count].attr.mode = ro_perm; \
1695
i->private_##attrb[count].store = NULL; \
1697
i->attrb[count] = &i->private_##attrb[count]; \
1701
#define SETUP_RPORT_ATTRIBUTE(field) \
1702
SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1704
#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
1705
SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1707
#define SETUP_PHY_ATTRIBUTE(field) \
1708
SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1710
#define SETUP_PHY_ATTRIBUTE_RW(field) \
1711
SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1712
!i->f->set_phy_speed, S_IRUGO)
1714
#define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
1715
SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
1716
!i->f->func, S_IRUGO)
1718
#define SETUP_PORT_ATTRIBUTE(field) \
1719
SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1721
#define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
1722
SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1724
#define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
1725
SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1727
#define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
1728
SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1730
#define SETUP_END_DEV_ATTRIBUTE(field) \
1731
SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1733
#define SETUP_EXPANDER_ATTRIBUTE(field) \
1734
SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1737
* sas_attach_transport - instantiate SAS transport template
1738
* @ft: SAS transport class function template
1740
struct scsi_transport_template *
1741
sas_attach_transport(struct sas_function_template *ft)
1743
struct sas_internal *i;
1746
i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1750
i->t.user_scan = sas_user_scan;
1752
i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1753
i->t.host_attrs.ac.class = &sas_host_class.class;
1754
i->t.host_attrs.ac.match = sas_host_match;
1755
transport_container_register(&i->t.host_attrs);
1756
i->t.host_size = sizeof(struct sas_host_attrs);
1758
i->phy_attr_cont.ac.class = &sas_phy_class.class;
1759
i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1760
i->phy_attr_cont.ac.match = sas_phy_match;
1761
transport_container_register(&i->phy_attr_cont);
1763
i->port_attr_cont.ac.class = &sas_port_class.class;
1764
i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1765
i->port_attr_cont.ac.match = sas_port_match;
1766
transport_container_register(&i->port_attr_cont);
1768
i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1769
i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1770
i->rphy_attr_cont.ac.match = sas_rphy_match;
1771
transport_container_register(&i->rphy_attr_cont);
1773
i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1774
i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1775
i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1776
transport_container_register(&i->end_dev_attr_cont);
1778
i->expander_attr_cont.ac.class = &sas_expander_class.class;
1779
i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1780
i->expander_attr_cont.ac.match = sas_expander_match;
1781
transport_container_register(&i->expander_attr_cont);
1786
SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1787
SETUP_PHY_ATTRIBUTE(target_port_protocols);
1788
SETUP_PHY_ATTRIBUTE(device_type);
1789
SETUP_PHY_ATTRIBUTE(sas_address);
1790
SETUP_PHY_ATTRIBUTE(phy_identifier);
1791
//SETUP_PHY_ATTRIBUTE(port_identifier);
1792
SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1793
SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1794
SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1795
SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1796
SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1798
SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1799
SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1800
SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1801
SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1802
SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1803
SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1804
SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1805
i->phy_attrs[count] = NULL;
1808
SETUP_PORT_ATTRIBUTE(num_phys);
1809
i->port_attrs[count] = NULL;
1812
SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1813
SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1814
SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1815
SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1816
SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
1817
SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1818
get_enclosure_identifier);
1819
SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1820
get_bay_identifier);
1821
i->rphy_attrs[count] = NULL;
1824
SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1825
SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1826
SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1827
SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1828
SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1829
i->end_dev_attrs[count] = NULL;
1832
SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1833
SETUP_EXPANDER_ATTRIBUTE(product_id);
1834
SETUP_EXPANDER_ATTRIBUTE(product_rev);
1835
SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1836
SETUP_EXPANDER_ATTRIBUTE(component_id);
1837
SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1838
SETUP_EXPANDER_ATTRIBUTE(level);
1839
i->expander_attrs[count] = NULL;
1843
EXPORT_SYMBOL(sas_attach_transport);
1846
* sas_release_transport - release SAS transport template instance
1847
* @t: transport template instance
1849
void sas_release_transport(struct scsi_transport_template *t)
1851
struct sas_internal *i = to_sas_internal(t);
1853
transport_container_unregister(&i->t.host_attrs);
1854
transport_container_unregister(&i->phy_attr_cont);
1855
transport_container_unregister(&i->port_attr_cont);
1856
transport_container_unregister(&i->rphy_attr_cont);
1857
transport_container_unregister(&i->end_dev_attr_cont);
1858
transport_container_unregister(&i->expander_attr_cont);
1862
EXPORT_SYMBOL(sas_release_transport);
1864
static __init int sas_transport_init(void)
1868
error = transport_class_register(&sas_host_class);
1871
error = transport_class_register(&sas_phy_class);
1873
goto out_unregister_transport;
1874
error = transport_class_register(&sas_port_class);
1876
goto out_unregister_phy;
1877
error = transport_class_register(&sas_rphy_class);
1879
goto out_unregister_port;
1880
error = transport_class_register(&sas_end_dev_class);
1882
goto out_unregister_rphy;
1883
error = transport_class_register(&sas_expander_class);
1885
goto out_unregister_end_dev;
1889
out_unregister_end_dev:
1890
transport_class_unregister(&sas_end_dev_class);
1891
out_unregister_rphy:
1892
transport_class_unregister(&sas_rphy_class);
1893
out_unregister_port:
1894
transport_class_unregister(&sas_port_class);
1896
transport_class_unregister(&sas_phy_class);
1897
out_unregister_transport:
1898
transport_class_unregister(&sas_host_class);
1904
static void __exit sas_transport_exit(void)
1906
transport_class_unregister(&sas_host_class);
1907
transport_class_unregister(&sas_phy_class);
1908
transport_class_unregister(&sas_port_class);
1909
transport_class_unregister(&sas_rphy_class);
1910
transport_class_unregister(&sas_end_dev_class);
1911
transport_class_unregister(&sas_expander_class);
1914
MODULE_AUTHOR("Christoph Hellwig");
1915
MODULE_DESCRIPTION("SAS Transport Attributes");
1916
MODULE_LICENSE("GPL");
1918
module_init(sas_transport_init);
1919
module_exit(sas_transport_exit);