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-rw-r--r--drivers/scsi/scsi_transport_sas.c820
1 files changed, 820 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
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index 000000000000..ff724bbe6611
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+++ b/drivers/scsi/scsi_transport_sas.c
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1/*
2 * Copyright (C) 2005 Dell Inc.
3 * Released under GPL v2.
4 *
5 * Serial Attached SCSI (SAS) transport class.
6 *
7 * The SAS transport class contains common code to deal with SAS HBAs,
8 * an aproximated representation of SAS topologies in the driver model,
9 * and various sysfs attributes to expose these topologies and managment
10 * interfaces to userspace.
11 *
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
19 * the same.
20 *
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.
24 */
25
26#include <linux/init.h>
27#include <linux/module.h>
28#include <linux/err.h>
29
30#include <scsi/scsi_device.h>
31#include <scsi/scsi_host.h>
32#include <scsi/scsi_transport.h>
33#include <scsi/scsi_transport_sas.h>
34
35
36#define SAS_HOST_ATTRS 0
37#define SAS_PORT_ATTRS 11
38#define SAS_RPORT_ATTRS 5
39
40struct sas_internal {
41 struct scsi_transport_template t;
42 struct sas_function_template *f;
43
44 struct class_device_attribute private_host_attrs[SAS_HOST_ATTRS];
45 struct class_device_attribute private_phy_attrs[SAS_PORT_ATTRS];
46 struct class_device_attribute private_rphy_attrs[SAS_RPORT_ATTRS];
47
48 struct transport_container phy_attr_cont;
49 struct transport_container rphy_attr_cont;
50
51 /*
52 * The array of null terminated pointers to attributes
53 * needed by scsi_sysfs.c
54 */
55 struct class_device_attribute *host_attrs[SAS_HOST_ATTRS + 1];
56 struct class_device_attribute *phy_attrs[SAS_PORT_ATTRS + 1];
57 struct class_device_attribute *rphy_attrs[SAS_RPORT_ATTRS + 1];
58};
59#define to_sas_internal(tmpl) container_of(tmpl, struct sas_internal, t)
60
61struct sas_host_attrs {
62 struct list_head rphy_list;
63 spinlock_t lock;
64 u32 next_target_id;
65};
66#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
67
68
69/*
70 * Hack to allow attributes of the same name in different objects.
71 */
72#define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
73 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
74 __ATTR(_name,_mode,_show,_store)
75
76
77/*
78 * Pretty printing helpers
79 */
80
81#define sas_bitfield_name_match(title, table) \
82static ssize_t \
83get_sas_##title##_names(u32 table_key, char *buf) \
84{ \
85 char *prefix = ""; \
86 ssize_t len = 0; \
87 int i; \
88 \
89 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
90 if (table[i].value & table_key) { \
91 len += sprintf(buf + len, "%s%s", \
92 prefix, table[i].name); \
93 prefix = ", "; \
94 } \
95 } \
96 len += sprintf(buf + len, "\n"); \
97 return len; \
98}
99
100#define sas_bitfield_name_search(title, table) \
101static ssize_t \
102get_sas_##title##_names(u32 table_key, char *buf) \
103{ \
104 ssize_t len = 0; \
105 int i; \
106 \
107 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
108 if (table[i].value == table_key) { \
109 len += sprintf(buf + len, "%s", \
110 table[i].name); \
111 break; \
112 } \
113 } \
114 len += sprintf(buf + len, "\n"); \
115 return len; \
116}
117
118static struct {
119 u32 value;
120 char *name;
121} sas_device_type_names[] = {
122 { SAS_PHY_UNUSED, "unused" },
123 { SAS_END_DEVICE, "end device" },
124 { SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
125 { SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
126};
127sas_bitfield_name_search(device_type, sas_device_type_names)
128
129
130static struct {
131 u32 value;
132 char *name;
133} sas_protocol_names[] = {
134 { SAS_PROTOCOL_SATA, "sata" },
135 { SAS_PROTOCOL_SMP, "smp" },
136 { SAS_PROTOCOL_STP, "stp" },
137 { SAS_PROTOCOL_SSP, "ssp" },
138};
139sas_bitfield_name_match(protocol, sas_protocol_names)
140
141static struct {
142 u32 value;
143 char *name;
144} sas_linkspeed_names[] = {
145 { SAS_LINK_RATE_UNKNOWN, "Unknown" },
146 { SAS_PHY_DISABLED, "Phy disabled" },
147 { SAS_LINK_RATE_FAILED, "Link Rate failed" },
148 { SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
149 { SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
150 { SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
151};
152sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
153
154
155/*
156 * SAS host attributes
157 */
158
159static int sas_host_setup(struct transport_container *tc, struct device *dev,
160 struct class_device *cdev)
161{
162 struct Scsi_Host *shost = dev_to_shost(dev);
163 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
164
165 INIT_LIST_HEAD(&sas_host->rphy_list);
166 spin_lock_init(&sas_host->lock);
167 sas_host->next_target_id = 0;
168 return 0;
169}
170
171static DECLARE_TRANSPORT_CLASS(sas_host_class,
172 "sas_host", sas_host_setup, NULL, NULL);
173
174static int sas_host_match(struct attribute_container *cont,
175 struct device *dev)
176{
177 struct Scsi_Host *shost;
178 struct sas_internal *i;
179
180 if (!scsi_is_host_device(dev))
181 return 0;
182 shost = dev_to_shost(dev);
183
184 if (!shost->transportt)
185 return 0;
186 if (shost->transportt->host_attrs.ac.class !=
187 &sas_host_class.class)
188 return 0;
189
190 i = to_sas_internal(shost->transportt);
191 return &i->t.host_attrs.ac == cont;
192}
193
194static int do_sas_phy_delete(struct device *dev, void *data)
195{
196 if (scsi_is_sas_phy(dev))
197 sas_phy_delete(dev_to_phy(dev));
198 return 0;
199}
200
201/**
202 * sas_remove_host -- tear down a Scsi_Host's SAS data structures
203 * @shost: Scsi Host that is torn down
204 *
205 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
206 * Must be called just before scsi_remove_host for SAS HBAs.
207 */
208void sas_remove_host(struct Scsi_Host *shost)
209{
210 device_for_each_child(&shost->shost_gendev, NULL, do_sas_phy_delete);
211}
212EXPORT_SYMBOL(sas_remove_host);
213
214
215/*
216 * SAS Port attributes
217 */
218
219#define sas_phy_show_simple(field, name, format_string, cast) \
220static ssize_t \
221show_sas_phy_##name(struct class_device *cdev, char *buf) \
222{ \
223 struct sas_phy *phy = transport_class_to_phy(cdev); \
224 \
225 return snprintf(buf, 20, format_string, cast phy->field); \
226}
227
228#define sas_phy_simple_attr(field, name, format_string, type) \
229 sas_phy_show_simple(field, name, format_string, (type)) \
230static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
231
232#define sas_phy_show_protocol(field, name) \
233static ssize_t \
234show_sas_phy_##name(struct class_device *cdev, char *buf) \
235{ \
236 struct sas_phy *phy = transport_class_to_phy(cdev); \
237 \
238 if (!phy->field) \
239 return snprintf(buf, 20, "none\n"); \
240 return get_sas_protocol_names(phy->field, buf); \
241}
242
243#define sas_phy_protocol_attr(field, name) \
244 sas_phy_show_protocol(field, name) \
245static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
246
247#define sas_phy_show_linkspeed(field) \
248static ssize_t \
249show_sas_phy_##field(struct class_device *cdev, char *buf) \
250{ \
251 struct sas_phy *phy = transport_class_to_phy(cdev); \
252 \
253 return get_sas_linkspeed_names(phy->field, buf); \
254}
255
256#define sas_phy_linkspeed_attr(field) \
257 sas_phy_show_linkspeed(field) \
258static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
259
260static ssize_t
261show_sas_device_type(struct class_device *cdev, char *buf)
262{
263 struct sas_phy *phy = transport_class_to_phy(cdev);
264
265 if (!phy->identify.device_type)
266 return snprintf(buf, 20, "none\n");
267 return get_sas_device_type_names(phy->identify.device_type, buf);
268}
269
270static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
271
272sas_phy_protocol_attr(identify.initiator_port_protocols,
273 initiator_port_protocols);
274sas_phy_protocol_attr(identify.target_port_protocols,
275 target_port_protocols);
276sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
277 unsigned long long);
278sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
279sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
280sas_phy_linkspeed_attr(negotiated_linkrate);
281sas_phy_linkspeed_attr(minimum_linkrate_hw);
282sas_phy_linkspeed_attr(minimum_linkrate);
283sas_phy_linkspeed_attr(maximum_linkrate_hw);
284sas_phy_linkspeed_attr(maximum_linkrate);
285
286
287static DECLARE_TRANSPORT_CLASS(sas_phy_class,
288 "sas_phy", NULL, NULL, NULL);
289
290static int sas_phy_match(struct attribute_container *cont, struct device *dev)
291{
292 struct Scsi_Host *shost;
293 struct sas_internal *i;
294
295 if (!scsi_is_sas_phy(dev))
296 return 0;
297 shost = dev_to_shost(dev->parent);
298
299 if (!shost->transportt)
300 return 0;
301 if (shost->transportt->host_attrs.ac.class !=
302 &sas_host_class.class)
303 return 0;
304
305 i = to_sas_internal(shost->transportt);
306 return &i->phy_attr_cont.ac == cont;
307}
308
309static void sas_phy_release(struct device *dev)
310{
311 struct sas_phy *phy = dev_to_phy(dev);
312
313 put_device(dev->parent);
314 kfree(phy);
315}
316
317/**
318 * sas_phy_alloc -- allocates and initialize a SAS PHY structure
319 * @parent: Parent device
320 * @number: Port number
321 *
322 * Allocates an SAS PHY structure. It will be added in the device tree
323 * below the device specified by @parent, which has to be either a Scsi_Host
324 * or sas_rphy.
325 *
326 * Returns:
327 * SAS PHY allocated or %NULL if the allocation failed.
328 */
329struct sas_phy *sas_phy_alloc(struct device *parent, int number)
330{
331 struct Scsi_Host *shost = dev_to_shost(parent);
332 struct sas_phy *phy;
333
334 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
335 if (!phy)
336 return NULL;
337 memset(phy, 0, sizeof(*phy));
338
339 get_device(parent);
340
341 phy->number = number;
342
343 device_initialize(&phy->dev);
344 phy->dev.parent = get_device(parent);
345 phy->dev.release = sas_phy_release;
346 sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
347
348 transport_setup_device(&phy->dev);
349
350 return phy;
351}
352EXPORT_SYMBOL(sas_phy_alloc);
353
354/**
355 * sas_phy_add -- add a SAS PHY to the device hierachy
356 * @phy: The PHY to be added
357 *
358 * Publishes a SAS PHY to the rest of the system.
359 */
360int sas_phy_add(struct sas_phy *phy)
361{
362 int error;
363
364 error = device_add(&phy->dev);
365 if (!error) {
366 transport_add_device(&phy->dev);
367 transport_configure_device(&phy->dev);
368 }
369
370 return error;
371}
372EXPORT_SYMBOL(sas_phy_add);
373
374/**
375 * sas_phy_free -- free a SAS PHY
376 * @phy: SAS PHY to free
377 *
378 * Frees the specified SAS PHY.
379 *
380 * Note:
381 * This function must only be called on a PHY that has not
382 * sucessfully been added using sas_phy_add().
383 */
384void sas_phy_free(struct sas_phy *phy)
385{
386 transport_destroy_device(&phy->dev);
387 put_device(phy->dev.parent);
388 put_device(phy->dev.parent);
389 put_device(phy->dev.parent);
390 kfree(phy);
391}
392EXPORT_SYMBOL(sas_phy_free);
393
394/**
395 * sas_phy_delete -- remove SAS PHY
396 * @phy: SAS PHY to remove
397 *
398 * Removes the specified SAS PHY. If the SAS PHY has an
399 * associated remote PHY it is removed before.
400 */
401void
402sas_phy_delete(struct sas_phy *phy)
403{
404 struct device *dev = &phy->dev;
405
406 if (phy->rphy)
407 sas_rphy_delete(phy->rphy);
408
409 transport_remove_device(dev);
410 device_del(dev);
411 transport_destroy_device(dev);
412 put_device(dev->parent);
413}
414EXPORT_SYMBOL(sas_phy_delete);
415
416/**
417 * scsi_is_sas_phy -- check if a struct device represents a SAS PHY
418 * @dev: device to check
419 *
420 * Returns:
421 * %1 if the device represents a SAS PHY, %0 else
422 */
423int scsi_is_sas_phy(const struct device *dev)
424{
425 return dev->release == sas_phy_release;
426}
427EXPORT_SYMBOL(scsi_is_sas_phy);
428
429/*
430 * SAS remote PHY attributes.
431 */
432
433#define sas_rphy_show_simple(field, name, format_string, cast) \
434static ssize_t \
435show_sas_rphy_##name(struct class_device *cdev, char *buf) \
436{ \
437 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
438 \
439 return snprintf(buf, 20, format_string, cast rphy->field); \
440}
441
442#define sas_rphy_simple_attr(field, name, format_string, type) \
443 sas_rphy_show_simple(field, name, format_string, (type)) \
444static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
445 show_sas_rphy_##name, NULL)
446
447#define sas_rphy_show_protocol(field, name) \
448static ssize_t \
449show_sas_rphy_##name(struct class_device *cdev, char *buf) \
450{ \
451 struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
452 \
453 if (!rphy->field) \
454 return snprintf(buf, 20, "none\n"); \
455 return get_sas_protocol_names(rphy->field, buf); \
456}
457
458#define sas_rphy_protocol_attr(field, name) \
459 sas_rphy_show_protocol(field, name) \
460static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
461 show_sas_rphy_##name, NULL)
462
463static ssize_t
464show_sas_rphy_device_type(struct class_device *cdev, char *buf)
465{
466 struct sas_rphy *rphy = transport_class_to_rphy(cdev);
467
468 if (!rphy->identify.device_type)
469 return snprintf(buf, 20, "none\n");
470 return get_sas_device_type_names(
471 rphy->identify.device_type, buf);
472}
473
474static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
475 show_sas_rphy_device_type, NULL);
476
477sas_rphy_protocol_attr(identify.initiator_port_protocols,
478 initiator_port_protocols);
479sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
480sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
481 unsigned long long);
482sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
483
484static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
485 "sas_rphy", NULL, NULL, NULL);
486
487static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
488{
489 struct Scsi_Host *shost;
490 struct sas_internal *i;
491
492 if (!scsi_is_sas_rphy(dev))
493 return 0;
494 shost = dev_to_shost(dev->parent->parent);
495
496 if (!shost->transportt)
497 return 0;
498 if (shost->transportt->host_attrs.ac.class !=
499 &sas_host_class.class)
500 return 0;
501
502 i = to_sas_internal(shost->transportt);
503 return &i->rphy_attr_cont.ac == cont;
504}
505
506static void sas_rphy_release(struct device *dev)
507{
508 struct sas_rphy *rphy = dev_to_rphy(dev);
509
510 put_device(dev->parent);
511 kfree(rphy);
512}
513
514/**
515 * sas_rphy_alloc -- allocates and initialize a SAS remote PHY structure
516 * @parent: SAS PHY this remote PHY is conneted to
517 *
518 * Allocates an SAS remote PHY structure, connected to @parent.
519 *
520 * Returns:
521 * SAS PHY allocated or %NULL if the allocation failed.
522 */
523struct sas_rphy *sas_rphy_alloc(struct sas_phy *parent)
524{
525 struct Scsi_Host *shost = dev_to_shost(&parent->dev);
526 struct sas_rphy *rphy;
527
528 rphy = kmalloc(sizeof(*rphy), GFP_KERNEL);
529 if (!rphy) {
530 put_device(&parent->dev);
531 return NULL;
532 }
533 memset(rphy, 0, sizeof(*rphy));
534
535 device_initialize(&rphy->dev);
536 rphy->dev.parent = get_device(&parent->dev);
537 rphy->dev.release = sas_rphy_release;
538 sprintf(rphy->dev.bus_id, "rphy-%d:%d",
539 shost->host_no, parent->number);
540 transport_setup_device(&rphy->dev);
541
542 return rphy;
543}
544EXPORT_SYMBOL(sas_rphy_alloc);
545
546/**
547 * sas_rphy_add -- add a SAS remote PHY to the device hierachy
548 * @rphy: The remote PHY to be added
549 *
550 * Publishes a SAS remote PHY to the rest of the system.
551 */
552int sas_rphy_add(struct sas_rphy *rphy)
553{
554 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
555 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
556 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
557 struct sas_identify *identify = &rphy->identify;
558 int error;
559
560 if (parent->rphy)
561 return -ENXIO;
562 parent->rphy = rphy;
563
564 error = device_add(&rphy->dev);
565 if (error)
566 return error;
567 transport_add_device(&rphy->dev);
568 transport_configure_device(&rphy->dev);
569
570 spin_lock(&sas_host->lock);
571 list_add_tail(&rphy->list, &sas_host->rphy_list);
572 if (identify->device_type == SAS_END_DEVICE &&
573 (identify->target_port_protocols &
574 (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
575 rphy->scsi_target_id = sas_host->next_target_id++;
576 else
577 rphy->scsi_target_id = -1;
578 spin_unlock(&sas_host->lock);
579
580 if (rphy->scsi_target_id != -1) {
581 scsi_scan_target(&rphy->dev, parent->number,
582 rphy->scsi_target_id, ~0, 0);
583 }
584
585 return 0;
586}
587EXPORT_SYMBOL(sas_rphy_add);
588
589/**
590 * sas_rphy_free -- free a SAS remote PHY
591 * @rphy SAS remote PHY to free
592 *
593 * Frees the specified SAS remote PHY.
594 *
595 * Note:
596 * This function must only be called on a remote
597 * PHY that has not sucessfully been added using
598 * sas_rphy_add().
599 */
600void sas_rphy_free(struct sas_rphy *rphy)
601{
602 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
603 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
604
605 spin_lock(&sas_host->lock);
606 list_del(&rphy->list);
607 spin_unlock(&sas_host->lock);
608
609 transport_destroy_device(&rphy->dev);
610 put_device(rphy->dev.parent);
611 put_device(rphy->dev.parent);
612 put_device(rphy->dev.parent);
613 kfree(rphy);
614}
615EXPORT_SYMBOL(sas_rphy_free);
616
617/**
618 * sas_rphy_delete -- remove SAS remote PHY
619 * @rphy: SAS remote PHY to remove
620 *
621 * Removes the specified SAS remote PHY.
622 */
623void
624sas_rphy_delete(struct sas_rphy *rphy)
625{
626 struct device *dev = &rphy->dev;
627 struct sas_phy *parent = dev_to_phy(dev->parent);
628 struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
629 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
630
631 transport_destroy_device(&rphy->dev);
632
633 scsi_remove_target(&rphy->dev);
634
635 spin_lock(&sas_host->lock);
636 list_del(&rphy->list);
637 spin_unlock(&sas_host->lock);
638
639 transport_remove_device(dev);
640 device_del(dev);
641 transport_destroy_device(dev);
642 put_device(&parent->dev);
643}
644EXPORT_SYMBOL(sas_rphy_delete);
645
646/**
647 * scsi_is_sas_rphy -- check if a struct device represents a SAS remote PHY
648 * @dev: device to check
649 *
650 * Returns:
651 * %1 if the device represents a SAS remote PHY, %0 else
652 */
653int scsi_is_sas_rphy(const struct device *dev)
654{
655 return dev->release == sas_rphy_release;
656}
657EXPORT_SYMBOL(scsi_is_sas_rphy);
658
659
660/*
661 * SCSI scan helper
662 */
663
664static struct device *sas_target_parent(struct Scsi_Host *shost,
665 int channel, uint id)
666{
667 struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
668 struct sas_rphy *rphy;
669 struct device *dev = NULL;
670
671 spin_lock(&sas_host->lock);
672 list_for_each_entry(rphy, &sas_host->rphy_list, list) {
673 struct sas_phy *parent = dev_to_phy(rphy->dev.parent);
674 if (parent->number == channel &&
675 rphy->scsi_target_id == id)
676 dev = &rphy->dev;
677 }
678 spin_unlock(&sas_host->lock);
679
680 return dev;
681}
682
683
684/*
685 * Setup / Teardown code
686 */
687
688#define SETUP_RPORT_ATTRIBUTE(field) \
689 i->private_rphy_attrs[count] = class_device_attr_##field; \
690 i->private_rphy_attrs[count].attr.mode = S_IRUGO; \
691 i->private_rphy_attrs[count].store = NULL; \
692 i->rphy_attrs[count] = &i->private_rphy_attrs[count]; \
693 count++
694
695#define SETUP_PORT_ATTRIBUTE(field) \
696 i->private_phy_attrs[count] = class_device_attr_##field; \
697 i->private_phy_attrs[count].attr.mode = S_IRUGO; \
698 i->private_phy_attrs[count].store = NULL; \
699 i->phy_attrs[count] = &i->private_phy_attrs[count]; \
700 count++
701
702
703/**
704 * sas_attach_transport -- instantiate SAS transport template
705 * @ft: SAS transport class function template
706 */
707struct scsi_transport_template *
708sas_attach_transport(struct sas_function_template *ft)
709{
710 struct sas_internal *i;
711 int count;
712
713 i = kmalloc(sizeof(struct sas_internal), GFP_KERNEL);
714 if (!i)
715 return NULL;
716 memset(i, 0, sizeof(struct sas_internal));
717
718 i->t.target_parent = sas_target_parent;
719
720 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
721 i->t.host_attrs.ac.class = &sas_host_class.class;
722 i->t.host_attrs.ac.match = sas_host_match;
723 transport_container_register(&i->t.host_attrs);
724 i->t.host_size = sizeof(struct sas_host_attrs);
725
726 i->phy_attr_cont.ac.class = &sas_phy_class.class;
727 i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
728 i->phy_attr_cont.ac.match = sas_phy_match;
729 transport_container_register(&i->phy_attr_cont);
730
731 i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
732 i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
733 i->rphy_attr_cont.ac.match = sas_rphy_match;
734 transport_container_register(&i->rphy_attr_cont);
735
736 i->f = ft;
737
738 count = 0;
739 i->host_attrs[count] = NULL;
740
741 count = 0;
742 SETUP_PORT_ATTRIBUTE(initiator_port_protocols);
743 SETUP_PORT_ATTRIBUTE(target_port_protocols);
744 SETUP_PORT_ATTRIBUTE(device_type);
745 SETUP_PORT_ATTRIBUTE(sas_address);
746 SETUP_PORT_ATTRIBUTE(phy_identifier);
747 SETUP_PORT_ATTRIBUTE(port_identifier);
748 SETUP_PORT_ATTRIBUTE(negotiated_linkrate);
749 SETUP_PORT_ATTRIBUTE(minimum_linkrate_hw);
750 SETUP_PORT_ATTRIBUTE(minimum_linkrate);
751 SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);
752 SETUP_PORT_ATTRIBUTE(maximum_linkrate);
753 i->phy_attrs[count] = NULL;
754
755 count = 0;
756 SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
757 SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
758 SETUP_RPORT_ATTRIBUTE(rphy_device_type);
759 SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
760 SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
761 i->rphy_attrs[count] = NULL;
762
763 return &i->t;
764}
765EXPORT_SYMBOL(sas_attach_transport);
766
767/**
768 * sas_release_transport -- release SAS transport template instance
769 * @t: transport template instance
770 */
771void sas_release_transport(struct scsi_transport_template *t)
772{
773 struct sas_internal *i = to_sas_internal(t);
774
775 transport_container_unregister(&i->t.host_attrs);
776 transport_container_unregister(&i->phy_attr_cont);
777 transport_container_unregister(&i->rphy_attr_cont);
778
779 kfree(i);
780}
781EXPORT_SYMBOL(sas_release_transport);
782
783static __init int sas_transport_init(void)
784{
785 int error;
786
787 error = transport_class_register(&sas_host_class);
788 if (error)
789 goto out;
790 error = transport_class_register(&sas_phy_class);
791 if (error)
792 goto out_unregister_transport;
793 error = transport_class_register(&sas_rphy_class);
794 if (error)
795 goto out_unregister_phy;
796
797 return 0;
798
799 out_unregister_phy:
800 transport_class_unregister(&sas_phy_class);
801 out_unregister_transport:
802 transport_class_unregister(&sas_host_class);
803 out:
804 return error;
805
806}
807
808static void __exit sas_transport_exit(void)
809{
810 transport_class_unregister(&sas_host_class);
811 transport_class_unregister(&sas_phy_class);
812 transport_class_unregister(&sas_rphy_class);
813}
814
815MODULE_AUTHOR("Christoph Hellwig");
816MODULE_DESCRIPTION("SAS Transphy Attributes");
817MODULE_LICENSE("GPL");
818
819module_init(sas_transport_init);
820module_exit(sas_transport_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-13 20:17:15 -0500