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-rw-r--r--drivers/ata/libata-transport.c774
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diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
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1/*
2 * Copyright 2008 ioogle, Inc. All rights reserved.
3 * Released under GPL v2.
4 *
5 * Libata transport class.
6 *
7 * The ATA transport class contains common code to deal with ATA HBAs,
8 * an approximated representation of ATA topologies in the driver model,
9 * and various sysfs attributes to expose these topologies and management
10 * interfaces to user-space.
11 *
12 * There are 3 objects defined in in this class:
13 * - ata_port
14 * - ata_link
15 * - ata_device
16 * Each port has a link object. Each link can have up to two devices for PATA
17 * and generally one for SATA.
18 * If there is SATA port multiplier [PMP], 15 additional ata_link object are
19 * created.
20 *
21 * These objects are created when the ata host is initialized and when a PMP is
22 * found. They are removed only when the HBA is removed, cleaned before the
23 * error handler runs.
24 */
25
26
27#include <linux/kernel.h>
28#include <linux/blkdev.h>
29#include <linux/spinlock.h>
30#include <linux/slab.h>
31#include <scsi/scsi_transport.h>
32#include <linux/libata.h>
33#include <linux/hdreg.h>
34#include <linux/uaccess.h>
35
36#include "libata.h"
37#include "libata-transport.h"
38
39#define ATA_PORT_ATTRS 2
40#define ATA_LINK_ATTRS 3
41#define ATA_DEV_ATTRS 9
42
43struct scsi_transport_template;
44struct scsi_transport_template *ata_scsi_transport_template;
45
46struct ata_internal {
47 struct scsi_transport_template t;
48
49 struct device_attribute private_port_attrs[ATA_PORT_ATTRS];
50 struct device_attribute private_link_attrs[ATA_LINK_ATTRS];
51 struct device_attribute private_dev_attrs[ATA_DEV_ATTRS];
52
53 struct transport_container link_attr_cont;
54 struct transport_container dev_attr_cont;
55
56 /*
57 * The array of null terminated pointers to attributes
58 * needed by scsi_sysfs.c
59 */
60 struct device_attribute *link_attrs[ATA_LINK_ATTRS + 1];
61 struct device_attribute *port_attrs[ATA_PORT_ATTRS + 1];
62 struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1];
63};
64#define to_ata_internal(tmpl) container_of(tmpl, struct ata_internal, t)
65
66
67#define tdev_to_device(d) \
68 container_of((d), struct ata_device, tdev)
69#define transport_class_to_dev(dev) \
70 tdev_to_device((dev)->parent)
71
72#define tdev_to_link(d) \
73 container_of((d), struct ata_link, tdev)
74#define transport_class_to_link(dev) \
75 tdev_to_link((dev)->parent)
76
77#define tdev_to_port(d) \
78 container_of((d), struct ata_port, tdev)
79#define transport_class_to_port(dev) \
80 tdev_to_port((dev)->parent)
81
82
83/* Device objects are always created whit link objects */
84static int ata_tdev_add(struct ata_device *dev);
85static void ata_tdev_delete(struct ata_device *dev);
86
87
88/*
89 * Hack to allow attributes of the same name in different objects.
90 */
91#define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
92 struct device_attribute device_attr_##_prefix##_##_name = \
93 __ATTR(_name,_mode,_show,_store)
94
95#define ata_bitfield_name_match(title, table) \
96static ssize_t \
97get_ata_##title##_names(u32 table_key, char *buf) \
98{ \
99 char *prefix = ""; \
100 ssize_t len = 0; \
101 int i; \
102 \
103 for (i = 0; i < ARRAY_SIZE(table); i++) { \
104 if (table[i].value & table_key) { \
105 len += sprintf(buf + len, "%s%s", \
106 prefix, table[i].name); \
107 prefix = ", "; \
108 } \
109 } \
110 len += sprintf(buf + len, "\n"); \
111 return len; \
112}
113
114#define ata_bitfield_name_search(title, table) \
115static ssize_t \
116get_ata_##title##_names(u32 table_key, char *buf) \
117{ \
118 ssize_t len = 0; \
119 int i; \
120 \
121 for (i = 0; i < ARRAY_SIZE(table); i++) { \
122 if (table[i].value == table_key) { \
123 len += sprintf(buf + len, "%s", \
124 table[i].name); \
125 break; \
126 } \
127 } \
128 len += sprintf(buf + len, "\n"); \
129 return len; \
130}
131
132static struct {
133 u32 value;
134 char *name;
135} ata_class_names[] = {
136 { ATA_DEV_UNKNOWN, "unknown" },
137 { ATA_DEV_ATA, "ata" },
138 { ATA_DEV_ATA_UNSUP, "ata" },
139 { ATA_DEV_ATAPI, "atapi" },
140 { ATA_DEV_ATAPI_UNSUP, "atapi" },
141 { ATA_DEV_PMP, "pmp" },
142 { ATA_DEV_PMP_UNSUP, "pmp" },
143 { ATA_DEV_SEMB, "semb" },
144 { ATA_DEV_SEMB_UNSUP, "semb" },
145 { ATA_DEV_NONE, "none" }
146};
147ata_bitfield_name_search(class, ata_class_names)
148
149
150static struct {
151 u32 value;
152 char *name;
153} ata_err_names[] = {
154 { AC_ERR_DEV, "DeviceError" },
155 { AC_ERR_HSM, "HostStateMachineError" },
156 { AC_ERR_TIMEOUT, "Timeout" },
157 { AC_ERR_MEDIA, "MediaError" },
158 { AC_ERR_ATA_BUS, "BusError" },
159 { AC_ERR_HOST_BUS, "HostBusError" },
160 { AC_ERR_SYSTEM, "SystemError" },
161 { AC_ERR_INVALID, "InvalidArg" },
162 { AC_ERR_OTHER, "Unknown" },
163 { AC_ERR_NODEV_HINT, "NoDeviceHint" },
164 { AC_ERR_NCQ, "NCQError" }
165};
166ata_bitfield_name_match(err, ata_err_names)
167
168static struct {
169 u32 value;
170 char *name;
171} ata_xfer_names[] = {
172 { XFER_UDMA_7, "XFER_UDMA_7" },
173 { XFER_UDMA_6, "XFER_UDMA_6" },
174 { XFER_UDMA_5, "XFER_UDMA_5" },
175 { XFER_UDMA_4, "XFER_UDMA_4" },
176 { XFER_UDMA_3, "XFER_UDMA_3" },
177 { XFER_UDMA_2, "XFER_UDMA_2" },
178 { XFER_UDMA_1, "XFER_UDMA_1" },
179 { XFER_UDMA_0, "XFER_UDMA_0" },
180 { XFER_MW_DMA_4, "XFER_MW_DMA_4" },
181 { XFER_MW_DMA_3, "XFER_MW_DMA_3" },
182 { XFER_MW_DMA_2, "XFER_MW_DMA_2" },
183 { XFER_MW_DMA_1, "XFER_MW_DMA_1" },
184 { XFER_MW_DMA_0, "XFER_MW_DMA_0" },
185 { XFER_SW_DMA_2, "XFER_SW_DMA_2" },
186 { XFER_SW_DMA_1, "XFER_SW_DMA_1" },
187 { XFER_SW_DMA_0, "XFER_SW_DMA_0" },
188 { XFER_PIO_6, "XFER_PIO_6" },
189 { XFER_PIO_5, "XFER_PIO_5" },
190 { XFER_PIO_4, "XFER_PIO_4" },
191 { XFER_PIO_3, "XFER_PIO_3" },
192 { XFER_PIO_2, "XFER_PIO_2" },
193 { XFER_PIO_1, "XFER_PIO_1" },
194 { XFER_PIO_0, "XFER_PIO_0" },
195 { XFER_PIO_SLOW, "XFER_PIO_SLOW" }
196};
197ata_bitfield_name_match(xfer,ata_xfer_names)
198
199/*
200 * ATA Port attributes
201 */
202#define ata_port_show_simple(field, name, format_string, cast) \
203static ssize_t \
204show_ata_port_##name(struct device *dev, \
205 struct device_attribute *attr, char *buf) \
206{ \
207 struct ata_port *ap = transport_class_to_port(dev); \
208 \
209 return snprintf(buf, 20, format_string, cast ap->field); \
210}
211
212#define ata_port_simple_attr(field, name, format_string, type) \
213 ata_port_show_simple(field, name, format_string, (type)) \
214static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
215
216ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
217ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
218
219static DECLARE_TRANSPORT_CLASS(ata_port_class,
220 "ata_port", NULL, NULL, NULL);
221
222static void ata_tport_release(struct device *dev)
223{
224 put_device(dev->parent);
225}
226
227/**
228 * ata_is_port -- check if a struct device represents a ATA port
229 * @dev: device to check
230 *
231 * Returns:
232 * %1 if the device represents a ATA Port, %0 else
233 */
234int ata_is_port(const struct device *dev)
235{
236 return dev->release == ata_tport_release;
237}
238
239static int ata_tport_match(struct attribute_container *cont,
240 struct device *dev)
241{
242 if (!ata_is_port(dev))
243 return 0;
244 return &ata_scsi_transport_template->host_attrs.ac == cont;
245}
246
247/**
248 * ata_tport_delete -- remove ATA PORT
249 * @port: ATA PORT to remove
250 *
251 * Removes the specified ATA PORT. Remove the associated link as well.
252 */
253void ata_tport_delete(struct ata_port *ap)
254{
255 struct device *dev = &ap->tdev;
256
257 ata_tlink_delete(&ap->link);
258
259 transport_remove_device(dev);
260 device_del(dev);
261 transport_destroy_device(dev);
262 put_device(dev);
263}
264
265/** ata_tport_add - initialize a transport ATA port structure
266 *
267 * @parent: parent device
268 * @ap: existing ata_port structure
269 *
270 * Initialize a ATA port structure for sysfs. It will be added to the device
271 * tree below the device specified by @parent which could be a PCI device.
272 *
273 * Returns %0 on success
274 */
275int ata_tport_add(struct device *parent,
276 struct ata_port *ap)
277{
278 int error;
279 struct device *dev = &ap->tdev;
280
281 device_initialize(dev);
282
283 dev->parent = get_device(parent);
284 dev->release = ata_tport_release;
285 dev_set_name(dev, "ata%d", ap->print_id);
286 transport_setup_device(dev);
287 error = device_add(dev);
288 if (error) {
289 goto tport_err;
290 }
291
292 transport_add_device(dev);
293 transport_configure_device(dev);
294
295 error = ata_tlink_add(&ap->link);
296 if (error) {
297 goto tport_link_err;
298 }
299 return 0;
300
301 tport_link_err:
302 transport_remove_device(dev);
303 device_del(dev);
304
305 tport_err:
306 transport_destroy_device(dev);
307 put_device(dev);
308 return error;
309}
310
311
312/*
313 * ATA link attributes
314 */
315
316
317#define ata_link_show_linkspeed(field) \
318static ssize_t \
319show_ata_link_##field(struct device *dev, \
320 struct device_attribute *attr, char *buf) \
321{ \
322 struct ata_link *link = transport_class_to_link(dev); \
323 \
324 return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \
325}
326
327#define ata_link_linkspeed_attr(field) \
328 ata_link_show_linkspeed(field) \
329static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
330
331ata_link_linkspeed_attr(hw_sata_spd_limit);
332ata_link_linkspeed_attr(sata_spd_limit);
333ata_link_linkspeed_attr(sata_spd);
334
335
336static DECLARE_TRANSPORT_CLASS(ata_link_class,
337 "ata_link", NULL, NULL, NULL);
338
339static void ata_tlink_release(struct device *dev)
340{
341 put_device(dev->parent);
342}
343
344/**
345 * ata_is_link -- check if a struct device represents a ATA link
346 * @dev: device to check
347 *
348 * Returns:
349 * %1 if the device represents a ATA link, %0 else
350 */
351int ata_is_link(const struct device *dev)
352{
353 return dev->release == ata_tlink_release;
354}
355
356static int ata_tlink_match(struct attribute_container *cont,
357 struct device *dev)
358{
359 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
360 if (!ata_is_link(dev))
361 return 0;
362 return &i->link_attr_cont.ac == cont;
363}
364
365/**
366 * ata_tlink_delete -- remove ATA LINK
367 * @port: ATA LINK to remove
368 *
369 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
370 */
371void ata_tlink_delete(struct ata_link *link)
372{
373 struct device *dev = &link->tdev;
374 struct ata_device *ata_dev;
375
376 ata_for_each_dev(ata_dev, link, ALL) {
377 ata_tdev_delete(ata_dev);
378 }
379
380 transport_remove_device(dev);
381 device_del(dev);
382 transport_destroy_device(dev);
383 put_device(dev);
384}
385
386/**
387 * ata_tlink_add -- initialize a transport ATA link structure
388 * @link: allocated ata_link structure.
389 *
390 * Initialize an ATA LINK structure for sysfs. It will be added in the
391 * device tree below the ATA PORT it belongs to.
392 *
393 * Returns %0 on success
394 */
395int ata_tlink_add(struct ata_link *link)
396{
397 struct device *dev = &link->tdev;
398 struct ata_port *ap = link->ap;
399 struct ata_device *ata_dev;
400 int error;
401
402 device_initialize(dev);
403 dev->parent = get_device(&ap->tdev);
404 dev->release = ata_tlink_release;
405 if (ata_is_host_link(link))
406 dev_set_name(dev, "link%d", ap->print_id);
407 else
408 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
409
410 transport_setup_device(dev);
411
412 error = device_add(dev);
413 if (error) {
414 goto tlink_err;
415 }
416
417 transport_add_device(dev);
418 transport_configure_device(dev);
419
420 ata_for_each_dev(ata_dev, link, ALL) {
421 error = ata_tdev_add(ata_dev);
422 if (error) {
423 goto tlink_dev_err;
424 }
425 }
426 return 0;
427 tlink_dev_err:
428 while (--ata_dev >= link->device) {
429 ata_tdev_delete(ata_dev);
430 }
431 transport_remove_device(dev);
432 device_del(dev);
433 tlink_err:
434 transport_destroy_device(dev);
435 put_device(dev);
436 return error;
437}
438
439/*
440 * ATA device attributes
441 */
442
443#define ata_dev_show_class(title, field) \
444static ssize_t \
445show_ata_dev_##field(struct device *dev, \
446 struct device_attribute *attr, char *buf) \
447{ \
448 struct ata_device *ata_dev = transport_class_to_dev(dev); \
449 \
450 return get_ata_##title##_names(ata_dev->field, buf); \
451}
452
453#define ata_dev_attr(title, field) \
454 ata_dev_show_class(title, field) \
455static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
456
457ata_dev_attr(class, class);
458ata_dev_attr(xfer, pio_mode);
459ata_dev_attr(xfer, dma_mode);
460ata_dev_attr(xfer, xfer_mode);
461
462
463#define ata_dev_show_simple(field, format_string, cast) \
464static ssize_t \
465show_ata_dev_##field(struct device *dev, \
466 struct device_attribute *attr, char *buf) \
467{ \
468 struct ata_device *ata_dev = transport_class_to_dev(dev); \
469 \
470 return snprintf(buf, 20, format_string, cast ata_dev->field); \
471}
472
473#define ata_dev_simple_attr(field, format_string, type) \
474 ata_dev_show_simple(field, format_string, (type)) \
475static DEVICE_ATTR(field, S_IRUGO, \
476 show_ata_dev_##field, NULL)
477
478ata_dev_simple_attr(spdn_cnt, "%d\n", int);
479
480struct ata_show_ering_arg {
481 char* buf;
482 int written;
483};
484
485static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
486{
487 struct ata_show_ering_arg* arg = void_arg;
488 struct timespec time;
489
490 jiffies_to_timespec(ent->timestamp,&time);
491 arg->written += sprintf(arg->buf + arg->written,
492 "[%5lu.%06lu]",
493 time.tv_sec, time.tv_nsec);
494 arg->written += get_ata_err_names(ent->err_mask,
495 arg->buf + arg->written);
496 return 0;
497}
498
499static ssize_t
500show_ata_dev_ering(struct device *dev,
501 struct device_attribute *attr, char *buf)
502{
503 struct ata_device *ata_dev = transport_class_to_dev(dev);
504 struct ata_show_ering_arg arg = { buf, 0 };
505
506 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
507 return arg.written;
508}
509
510
511static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
512
513static ssize_t
514show_ata_dev_id(struct device *dev,
515 struct device_attribute *attr, char *buf)
516{
517 struct ata_device *ata_dev = transport_class_to_dev(dev);
518 int written = 0, i = 0;
519
520 if (ata_dev->class == ATA_DEV_PMP)
521 return 0;
522 for(i=0;i<ATA_ID_WORDS;i++) {
523 written += snprintf(buf+written, 20, "%04x%c",
524 ata_dev->id[i],
525 ((i+1) & 7) ? ' ' : '\n');
526 }
527 return written;
528}
529
530static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
531
532static ssize_t
533show_ata_dev_gscr(struct device *dev,
534 struct device_attribute *attr, char *buf)
535{
536 struct ata_device *ata_dev = transport_class_to_dev(dev);
537 int written = 0, i = 0;
538
539 if (ata_dev->class != ATA_DEV_PMP)
540 return 0;
541 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
542 written += snprintf(buf+written, 20, "%08x%c",
543 ata_dev->gscr[i],
544 ((i+1) & 3) ? ' ' : '\n');
545 }
546 if (SATA_PMP_GSCR_DWORDS & 3)
547 buf[written-1] = '\n';
548 return written;
549}
550
551static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
552
553static DECLARE_TRANSPORT_CLASS(ata_dev_class,
554 "ata_device", NULL, NULL, NULL);
555
556static void ata_tdev_release(struct device *dev)
557{
558 put_device(dev->parent);
559}
560
561/**
562 * ata_is_ata_dev -- check if a struct device represents a ATA device
563 * @dev: device to check
564 *
565 * Returns:
566 * %1 if the device represents a ATA device, %0 else
567 */
568int ata_is_ata_dev(const struct device *dev)
569{
570 return dev->release == ata_tdev_release;
571}
572
573static int ata_tdev_match(struct attribute_container *cont,
574 struct device *dev)
575{
576 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
577 if (!ata_is_ata_dev(dev))
578 return 0;
579 return &i->dev_attr_cont.ac == cont;
580}
581
582/**
583 * ata_tdev_free -- free a ATA LINK
584 * @dev: ATA PHY to free
585 *
586 * Frees the specified ATA PHY.
587 *
588 * Note:
589 * This function must only be called on a PHY that has not
590 * successfully been added using ata_tdev_add().
591 */
592static void ata_tdev_free(struct ata_device *dev)
593{
594 transport_destroy_device(&dev->tdev);
595 put_device(&dev->tdev);
596}
597
598/**
599 * ata_tdev_delete -- remove ATA device
600 * @port: ATA PORT to remove
601 *
602 * Removes the specified ATA device.
603 */
604static void ata_tdev_delete(struct ata_device *ata_dev)
605{
606 struct device *dev = &ata_dev->tdev;
607
608 transport_remove_device(dev);
609 device_del(dev);
610 ata_tdev_free(ata_dev);
611}
612
613
614/**
615 * ata_tdev_add -- initialize a transport ATA device structure.
616 * @ata_dev: ata_dev structure.
617 *
618 * Initialize an ATA device structure for sysfs. It will be added in the
619 * device tree below the ATA LINK device it belongs to.
620 *
621 * Returns %0 on success
622 */
623static int ata_tdev_add(struct ata_device *ata_dev)
624{
625 struct device *dev = &ata_dev->tdev;
626 struct ata_link *link = ata_dev->link;
627 struct ata_port *ap = link->ap;
628 int error;
629
630 device_initialize(dev);
631 dev->parent = get_device(&link->tdev);
632 dev->release = ata_tdev_release;
633 if (ata_is_host_link(link))
634 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
635 else
636 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
637
638 transport_setup_device(dev);
639 error = device_add(dev);
640 if (error) {
641 ata_tdev_free(ata_dev);
642 return error;
643 }
644
645 transport_add_device(dev);
646 transport_configure_device(dev);
647 return 0;
648}
649
650
651/*
652 * Setup / Teardown code
653 */
654
655#define SETUP_TEMPLATE(attrb, field, perm, test) \
656 i->private_##attrb[count] = dev_attr_##field; \
657 i->private_##attrb[count].attr.mode = perm; \
658 i->attrb[count] = &i->private_##attrb[count]; \
659 if (test) \
660 count++
661
662#define SETUP_LINK_ATTRIBUTE(field) \
663 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
664
665#define SETUP_PORT_ATTRIBUTE(field) \
666 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
667
668#define SETUP_DEV_ATTRIBUTE(field) \
669 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
670
671/**
672 * ata_attach_transport -- instantiate ATA transport template
673 */
674struct scsi_transport_template *ata_attach_transport(void)
675{
676 struct ata_internal *i;
677 int count;
678
679 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
680 if (!i)
681 return NULL;
682
683 i->t.eh_strategy_handler = ata_scsi_error;
684 i->t.eh_timed_out = ata_scsi_timed_out;
685 i->t.user_scan = ata_scsi_user_scan;
686
687 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
688 i->t.host_attrs.ac.class = &ata_port_class.class;
689 i->t.host_attrs.ac.match = ata_tport_match;
690 transport_container_register(&i->t.host_attrs);
691
692 i->link_attr_cont.ac.class = &ata_link_class.class;
693 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
694 i->link_attr_cont.ac.match = ata_tlink_match;
695 transport_container_register(&i->link_attr_cont);
696
697 i->dev_attr_cont.ac.class = &ata_dev_class.class;
698 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
699 i->dev_attr_cont.ac.match = ata_tdev_match;
700 transport_container_register(&i->dev_attr_cont);
701
702 count = 0;
703 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
704 SETUP_PORT_ATTRIBUTE(idle_irq);
705 BUG_ON(count > ATA_PORT_ATTRS);
706 i->port_attrs[count] = NULL;
707
708 count = 0;
709 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
710 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
711 SETUP_LINK_ATTRIBUTE(sata_spd);
712 BUG_ON(count > ATA_LINK_ATTRS);
713 i->link_attrs[count] = NULL;
714
715 count = 0;
716 SETUP_DEV_ATTRIBUTE(class);
717 SETUP_DEV_ATTRIBUTE(pio_mode);
718 SETUP_DEV_ATTRIBUTE(dma_mode);
719 SETUP_DEV_ATTRIBUTE(xfer_mode);
720 SETUP_DEV_ATTRIBUTE(spdn_cnt);
721 SETUP_DEV_ATTRIBUTE(ering);
722 SETUP_DEV_ATTRIBUTE(id);
723 SETUP_DEV_ATTRIBUTE(gscr);
724 BUG_ON(count > ATA_DEV_ATTRS);
725 i->dev_attrs[count] = NULL;
726
727 return &i->t;
728}
729
730/**
731 * ata_release_transport -- release ATA transport template instance
732 * @t: transport template instance
733 */
734void ata_release_transport(struct scsi_transport_template *t)
735{
736 struct ata_internal *i = to_ata_internal(t);
737
738 transport_container_unregister(&i->t.host_attrs);
739 transport_container_unregister(&i->link_attr_cont);
740 transport_container_unregister(&i->dev_attr_cont);
741
742 kfree(i);
743}
744
745__init int libata_transport_init(void)
746{
747 int error;
748
749 error = transport_class_register(&ata_link_class);
750 if (error)
751 goto out_unregister_transport;
752 error = transport_class_register(&ata_port_class);
753 if (error)
754 goto out_unregister_link;
755 error = transport_class_register(&ata_dev_class);
756 if (error)
757 goto out_unregister_port;
758 return 0;
759
760 out_unregister_port:
761 transport_class_unregister(&ata_port_class);
762 out_unregister_link:
763 transport_class_unregister(&ata_link_class);
764 out_unregister_transport:
765 return error;
766
767}
768
769void __exit libata_transport_exit(void)
770{
771 transport_class_unregister(&ata_link_class);
772 transport_class_unregister(&ata_port_class);
773 transport_class_unregister(&ata_dev_class);
774}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-08 09:04:45 -0500