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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
[deliverable/linux.git] / drivers / ata / libata-transport.c
CommitLineData
d9027470
GG		 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>
6a2148c6 30#include <linux/slab.h>
d9027470
GG		 31#include <scsi/scsi_transport.h>
32#include <linux/libata.h>
33#include <linux/hdreg.h>
34#include <linux/uaccess.h>
9ee4f393 35#include <linux/pm_runtime.h>
d9027470
GG		 36
37#include "libata.h"
38#include "libata-transport.h"
39
e628dc99 40#define ATA_PORT_ATTRS 3
d9027470
GG		 41#define ATA_LINK_ATTRS 3
42#define ATA_DEV_ATTRS 9
43
44struct scsi_transport_template;
45struct scsi_transport_template *ata_scsi_transport_template;
46
47struct ata_internal {
48 struct scsi_transport_template t;
49
50 struct device_attribute private_port_attrs[ATA_PORT_ATTRS];
51 struct device_attribute private_link_attrs[ATA_LINK_ATTRS];
52 struct device_attribute private_dev_attrs[ATA_DEV_ATTRS];
53
54 struct transport_container link_attr_cont;
55 struct transport_container dev_attr_cont;
56
57 /*
58 * The array of null terminated pointers to attributes
59 * needed by scsi_sysfs.c
60 */
61 struct device_attribute *link_attrs[ATA_LINK_ATTRS + 1];
62 struct device_attribute *port_attrs[ATA_PORT_ATTRS + 1];
63 struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1];
64};
65#define to_ata_internal(tmpl) container_of(tmpl, struct ata_internal, t)
66
67
68#define tdev_to_device(d) \
69 container_of((d), struct ata_device, tdev)
70#define transport_class_to_dev(dev) \
71 tdev_to_device((dev)->parent)
72
73#define tdev_to_link(d) \
74 container_of((d), struct ata_link, tdev)
75#define transport_class_to_link(dev) \
76 tdev_to_link((dev)->parent)
77
78#define tdev_to_port(d) \
79 container_of((d), struct ata_port, tdev)
80#define transport_class_to_port(dev) \
81 tdev_to_port((dev)->parent)
82
83
84/* Device objects are always created whit link objects */
85static int ata_tdev_add(struct ata_device *dev);
86static void ata_tdev_delete(struct ata_device *dev);
87
88
89/*
90 * Hack to allow attributes of the same name in different objects.
91 */
92#define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
93 struct device_attribute device_attr_##_prefix##_##_name = \
94 __ATTR(_name,_mode,_show,_store)
95
96#define ata_bitfield_name_match(title, table) \
97static ssize_t \
98get_ata_##title##_names(u32 table_key, char *buf) \
99{ \
100 char *prefix = ""; \
101 ssize_t len = 0; \
102 int i; \
103 \
104 for (i = 0; i < ARRAY_SIZE(table); i++) { \
105 if (table[i].value & table_key) { \
106 len += sprintf(buf + len, "%s%s", \
107 prefix, table[i].name); \
108 prefix = ", "; \
109 } \
110 } \
111 len += sprintf(buf + len, "\n"); \
112 return len; \
113}
114
115#define ata_bitfield_name_search(title, table) \
116static ssize_t \
117get_ata_##title##_names(u32 table_key, char *buf) \
118{ \
119 ssize_t len = 0; \
120 int i; \
121 \
122 for (i = 0; i < ARRAY_SIZE(table); i++) { \
123 if (table[i].value == table_key) { \
124 len += sprintf(buf + len, "%s", \
125 table[i].name); \
126 break; \
127 } \
128 } \
129 len += sprintf(buf + len, "\n"); \
130 return len; \
131}
132
133static struct {
134 u32 value;
135 char *name;
136} ata_class_names[] = {
137 { ATA_DEV_UNKNOWN, "unknown" },
138 { ATA_DEV_ATA, "ata" },
139 { ATA_DEV_ATA_UNSUP, "ata" },
140 { ATA_DEV_ATAPI, "atapi" },
141 { ATA_DEV_ATAPI_UNSUP, "atapi" },
142 { ATA_DEV_PMP, "pmp" },
143 { ATA_DEV_PMP_UNSUP, "pmp" },
144 { ATA_DEV_SEMB, "semb" },
145 { ATA_DEV_SEMB_UNSUP, "semb" },
9162c657 146 { ATA_DEV_ZAC, "zac" },
d9027470
GG		 147 { ATA_DEV_NONE, "none" }
148};
149ata_bitfield_name_search(class, ata_class_names)
150
151
152static struct {
153 u32 value;
154 char *name;
155} ata_err_names[] = {
156 { AC_ERR_DEV, "DeviceError" },
157 { AC_ERR_HSM, "HostStateMachineError" },
158 { AC_ERR_TIMEOUT, "Timeout" },
159 { AC_ERR_MEDIA, "MediaError" },
160 { AC_ERR_ATA_BUS, "BusError" },
161 { AC_ERR_HOST_BUS, "HostBusError" },
162 { AC_ERR_SYSTEM, "SystemError" },
163 { AC_ERR_INVALID, "InvalidArg" },
164 { AC_ERR_OTHER, "Unknown" },
165 { AC_ERR_NODEV_HINT, "NoDeviceHint" },
166 { AC_ERR_NCQ, "NCQError" }
167};
168ata_bitfield_name_match(err, ata_err_names)
169
170static struct {
171 u32 value;
172 char *name;
173} ata_xfer_names[] = {
174 { XFER_UDMA_7, "XFER_UDMA_7" },
175 { XFER_UDMA_6, "XFER_UDMA_6" },
176 { XFER_UDMA_5, "XFER_UDMA_5" },
177 { XFER_UDMA_4, "XFER_UDMA_4" },
178 { XFER_UDMA_3, "XFER_UDMA_3" },
179 { XFER_UDMA_2, "XFER_UDMA_2" },
180 { XFER_UDMA_1, "XFER_UDMA_1" },
181 { XFER_UDMA_0, "XFER_UDMA_0" },
182 { XFER_MW_DMA_4, "XFER_MW_DMA_4" },
183 { XFER_MW_DMA_3, "XFER_MW_DMA_3" },
184 { XFER_MW_DMA_2, "XFER_MW_DMA_2" },
185 { XFER_MW_DMA_1, "XFER_MW_DMA_1" },
186 { XFER_MW_DMA_0, "XFER_MW_DMA_0" },
187 { XFER_SW_DMA_2, "XFER_SW_DMA_2" },
188 { XFER_SW_DMA_1, "XFER_SW_DMA_1" },
189 { XFER_SW_DMA_0, "XFER_SW_DMA_0" },
190 { XFER_PIO_6, "XFER_PIO_6" },
191 { XFER_PIO_5, "XFER_PIO_5" },
192 { XFER_PIO_4, "XFER_PIO_4" },
193 { XFER_PIO_3, "XFER_PIO_3" },
194 { XFER_PIO_2, "XFER_PIO_2" },
195 { XFER_PIO_1, "XFER_PIO_1" },
196 { XFER_PIO_0, "XFER_PIO_0" },
197 { XFER_PIO_SLOW, "XFER_PIO_SLOW" }
198};
199ata_bitfield_name_match(xfer,ata_xfer_names)
200
201/*
202 * ATA Port attributes
203 */
204#define ata_port_show_simple(field, name, format_string, cast) \
205static ssize_t \
206show_ata_port_##name(struct device *dev, \
207 struct device_attribute *attr, char *buf) \
208{ \
209 struct ata_port *ap = transport_class_to_port(dev); \
210 \
211 return snprintf(buf, 20, format_string, cast ap->field); \
212}
213
214#define ata_port_simple_attr(field, name, format_string, type) \
215 ata_port_show_simple(field, name, format_string, (type)) \
216static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
217
218ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
219ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
e628dc99 220ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int);
d9027470
GG		 221
222static DECLARE_TRANSPORT_CLASS(ata_port_class,
223 "ata_port", NULL, NULL, NULL);
224
225static void ata_tport_release(struct device *dev)
226{
227 put_device(dev->parent);
228}
229
230/**
231 * ata_is_port -- check if a struct device represents a ATA port
232 * @dev: device to check
233 *
234 * Returns:
235 * %1 if the device represents a ATA Port, %0 else
236 */
b0e73af7 237static int ata_is_port(const struct device *dev)
d9027470
GG		 238{
239 return dev->release == ata_tport_release;
240}
241
242static int ata_tport_match(struct attribute_container *cont,
243 struct device *dev)
244{
245 if (!ata_is_port(dev))
246 return 0;
247 return &ata_scsi_transport_template->host_attrs.ac == cont;
248}
249
250/**
251 * ata_tport_delete -- remove ATA PORT
252 * @port: ATA PORT to remove
253 *
254 * Removes the specified ATA PORT. Remove the associated link as well.
255 */
256void ata_tport_delete(struct ata_port *ap)
257{
258 struct device *dev = &ap->tdev;
259
260 ata_tlink_delete(&ap->link);
261
262 transport_remove_device(dev);
263 device_del(dev);
264 transport_destroy_device(dev);
265 put_device(dev);
266}
267
268/** ata_tport_add - initialize a transport ATA port structure
269 *
270 * @parent: parent device
271 * @ap: existing ata_port structure
272 *
273 * Initialize a ATA port structure for sysfs. It will be added to the device
274 * tree below the device specified by @parent which could be a PCI device.
275 *
276 * Returns %0 on success
277 */
278int ata_tport_add(struct device *parent,
279 struct ata_port *ap)
280{
281 int error;
282 struct device *dev = &ap->tdev;
283
284 device_initialize(dev);
5ef41082 285 dev->type = &ata_port_type;
d9027470
GG		 286
287 dev->parent = get_device(parent);
288 dev->release = ata_tport_release;
289 dev_set_name(dev, "ata%d", ap->print_id);
290 transport_setup_device(dev);
f1bc1e4c 291 ata_acpi_bind_port(ap);
d9027470
GG		 292 error = device_add(dev);
293 if (error) {
294 goto tport_err;
295 }
296
966f1212 297 device_enable_async_suspend(dev);
9ee4f393
LM		 298 pm_runtime_set_active(dev);
299 pm_runtime_enable(dev);
0c8d32c2 300 pm_runtime_forbid(dev);
9ee4f393 301
d9027470
GG		 302 transport_add_device(dev);
303 transport_configure_device(dev);
304
305 error = ata_tlink_add(&ap->link);
306 if (error) {
307 goto tport_link_err;
308 }
309 return 0;
310
311 tport_link_err:
312 transport_remove_device(dev);
313 device_del(dev);
314
315 tport_err:
316 transport_destroy_device(dev);
317 put_device(dev);
318 return error;
319}
320
321
322/*
323 * ATA link attributes
324 */
3e85c3ec 325static int noop(int x) { return x; }
d9027470 326
3e85c3ec 327#define ata_link_show_linkspeed(field, format) \
d9027470
GG		 328static ssize_t \
329show_ata_link_##field(struct device *dev, \
330 struct device_attribute *attr, char *buf) \
331{ \
332 struct ata_link *link = transport_class_to_link(dev); \
333 \
3e85c3ec 334 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \
d9027470
GG		 335}
336
3e85c3ec
GG		 337#define ata_link_linkspeed_attr(field, format) \
338 ata_link_show_linkspeed(field, format) \
d9027470
GG		 339static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
340
3e85c3ec
GG		 341ata_link_linkspeed_attr(hw_sata_spd_limit, fls);
342ata_link_linkspeed_attr(sata_spd_limit, fls);
343ata_link_linkspeed_attr(sata_spd, noop);
d9027470
GG		 344
345
346static DECLARE_TRANSPORT_CLASS(ata_link_class,
347 "ata_link", NULL, NULL, NULL);
348
349static void ata_tlink_release(struct device *dev)
350{
351 put_device(dev->parent);
352}
353
354/**
355 * ata_is_link -- check if a struct device represents a ATA link
356 * @dev: device to check
357 *
358 * Returns:
359 * %1 if the device represents a ATA link, %0 else
360 */
b0e73af7 361static int ata_is_link(const struct device *dev)
d9027470
GG		 362{
363 return dev->release == ata_tlink_release;
364}
365
366static int ata_tlink_match(struct attribute_container *cont,
367 struct device *dev)
368{
369 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
370 if (!ata_is_link(dev))
371 return 0;
372 return &i->link_attr_cont.ac == cont;
373}
374
375/**
376 * ata_tlink_delete -- remove ATA LINK
377 * @port: ATA LINK to remove
378 *
379 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
380 */
381void ata_tlink_delete(struct ata_link *link)
382{
383 struct device *dev = &link->tdev;
384 struct ata_device *ata_dev;
385
386 ata_for_each_dev(ata_dev, link, ALL) {
387 ata_tdev_delete(ata_dev);
388 }
389
390 transport_remove_device(dev);
391 device_del(dev);
392 transport_destroy_device(dev);
393 put_device(dev);
394}
395
396/**
397 * ata_tlink_add -- initialize a transport ATA link structure
398 * @link: allocated ata_link structure.
399 *
400 * Initialize an ATA LINK structure for sysfs. It will be added in the
401 * device tree below the ATA PORT it belongs to.
402 *
403 * Returns %0 on success
404 */
405int ata_tlink_add(struct ata_link *link)
406{
407 struct device *dev = &link->tdev;
408 struct ata_port *ap = link->ap;
409 struct ata_device *ata_dev;
410 int error;
411
412 device_initialize(dev);
413 dev->parent = get_device(&ap->tdev);
414 dev->release = ata_tlink_release;
415 if (ata_is_host_link(link))
416 dev_set_name(dev, "link%d", ap->print_id);
417 else
418 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
419
420 transport_setup_device(dev);
421
422 error = device_add(dev);
423 if (error) {
424 goto tlink_err;
425 }
426
427 transport_add_device(dev);
428 transport_configure_device(dev);
429
430 ata_for_each_dev(ata_dev, link, ALL) {
431 error = ata_tdev_add(ata_dev);
432 if (error) {
433 goto tlink_dev_err;
434 }
435 }
436 return 0;
437 tlink_dev_err:
438 while (--ata_dev >= link->device) {
439 ata_tdev_delete(ata_dev);
440 }
441 transport_remove_device(dev);
442 device_del(dev);
443 tlink_err:
444 transport_destroy_device(dev);
445 put_device(dev);
446 return error;
447}
448
449/*
450 * ATA device attributes
451 */
452
453#define ata_dev_show_class(title, field) \
454static ssize_t \
455show_ata_dev_##field(struct device *dev, \
456 struct device_attribute *attr, char *buf) \
457{ \
458 struct ata_device *ata_dev = transport_class_to_dev(dev); \
459 \
460 return get_ata_##title##_names(ata_dev->field, buf); \
461}
462
463#define ata_dev_attr(title, field) \
464 ata_dev_show_class(title, field) \
465static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
466
467ata_dev_attr(class, class);
468ata_dev_attr(xfer, pio_mode);
469ata_dev_attr(xfer, dma_mode);
470ata_dev_attr(xfer, xfer_mode);
471
472
473#define ata_dev_show_simple(field, format_string, cast) \
474static ssize_t \
475show_ata_dev_##field(struct device *dev, \
476 struct device_attribute *attr, char *buf) \
477{ \
478 struct ata_device *ata_dev = transport_class_to_dev(dev); \
479 \
480 return snprintf(buf, 20, format_string, cast ata_dev->field); \
481}
482
483#define ata_dev_simple_attr(field, format_string, type) \
484 ata_dev_show_simple(field, format_string, (type)) \
485static DEVICE_ATTR(field, S_IRUGO, \
486 show_ata_dev_##field, NULL)
487
488ata_dev_simple_attr(spdn_cnt, "%d\n", int);
489
490struct ata_show_ering_arg {
491 char* buf;
492 int written;
493};
494
495static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
496{
497 struct ata_show_ering_arg* arg = void_arg;
498 struct timespec time;
499
500 jiffies_to_timespec(ent->timestamp,&time);
501 arg->written += sprintf(arg->buf + arg->written,
502 "[%5lu.%06lu]",
503 time.tv_sec, time.tv_nsec);
504 arg->written += get_ata_err_names(ent->err_mask,
505 arg->buf + arg->written);
506 return 0;
507}
508
509static ssize_t
510show_ata_dev_ering(struct device *dev,
511 struct device_attribute *attr, char *buf)
512{
513 struct ata_device *ata_dev = transport_class_to_dev(dev);
514 struct ata_show_ering_arg arg = { buf, 0 };
515
516 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
517 return arg.written;
518}
519
520
521static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
522
523static ssize_t
524show_ata_dev_id(struct device *dev,
525 struct device_attribute *attr, char *buf)
526{
527 struct ata_device *ata_dev = transport_class_to_dev(dev);
528 int written = 0, i = 0;
529
530 if (ata_dev->class == ATA_DEV_PMP)
531 return 0;
532 for(i=0;i<ATA_ID_WORDS;i++) {
533 written += snprintf(buf+written, 20, "%04x%c",
534 ata_dev->id[i],
535 ((i+1) & 7) ? ' ' : '\n');
536 }
537 return written;
538}
539
540static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
541
542static ssize_t
543show_ata_dev_gscr(struct device *dev,
544 struct device_attribute *attr, char *buf)
545{
546 struct ata_device *ata_dev = transport_class_to_dev(dev);
547 int written = 0, i = 0;
548
549 if (ata_dev->class != ATA_DEV_PMP)
550 return 0;
551 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
552 written += snprintf(buf+written, 20, "%08x%c",
553 ata_dev->gscr[i],
554 ((i+1) & 3) ? ' ' : '\n');
555 }
556 if (SATA_PMP_GSCR_DWORDS & 3)
557 buf[written-1] = '\n';
558 return written;
559}
560
561static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
562
563static DECLARE_TRANSPORT_CLASS(ata_dev_class,
564 "ata_device", NULL, NULL, NULL);
565
566static void ata_tdev_release(struct device *dev)
567{
568 put_device(dev->parent);
569}
570
571/**
572 * ata_is_ata_dev -- check if a struct device represents a ATA device
573 * @dev: device to check
574 *
575 * Returns:
576 * %1 if the device represents a ATA device, %0 else
577 */
b0e73af7 578static int ata_is_ata_dev(const struct device *dev)
d9027470
GG		 579{
580 return dev->release == ata_tdev_release;
581}
582
583static int ata_tdev_match(struct attribute_container *cont,
584 struct device *dev)
585{
586 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
587 if (!ata_is_ata_dev(dev))
588 return 0;
589 return &i->dev_attr_cont.ac == cont;
590}
591
592/**
593 * ata_tdev_free -- free a ATA LINK
594 * @dev: ATA PHY to free
595 *
596 * Frees the specified ATA PHY.
597 *
598 * Note:
599 * This function must only be called on a PHY that has not
600 * successfully been added using ata_tdev_add().
601 */
602static void ata_tdev_free(struct ata_device *dev)
603{
604 transport_destroy_device(&dev->tdev);
605 put_device(&dev->tdev);
606}
607
608/**
609 * ata_tdev_delete -- remove ATA device
610 * @port: ATA PORT to remove
611 *
612 * Removes the specified ATA device.
613 */
614static void ata_tdev_delete(struct ata_device *ata_dev)
615{
616 struct device *dev = &ata_dev->tdev;
617
618 transport_remove_device(dev);
619 device_del(dev);
620 ata_tdev_free(ata_dev);
621}
622
623
624/**
625 * ata_tdev_add -- initialize a transport ATA device structure.
626 * @ata_dev: ata_dev structure.
627 *
628 * Initialize an ATA device structure for sysfs. It will be added in the
629 * device tree below the ATA LINK device it belongs to.
630 *
631 * Returns %0 on success
632 */
633static int ata_tdev_add(struct ata_device *ata_dev)
634{
635 struct device *dev = &ata_dev->tdev;
636 struct ata_link *link = ata_dev->link;
637 struct ata_port *ap = link->ap;
638 int error;
639
640 device_initialize(dev);
641 dev->parent = get_device(&link->tdev);
642 dev->release = ata_tdev_release;
643 if (ata_is_host_link(link))
644 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
645 else
646 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
647
648 transport_setup_device(dev);
f1bc1e4c 649 ata_acpi_bind_dev(ata_dev);
d9027470
GG		 650 error = device_add(dev);
651 if (error) {
652 ata_tdev_free(ata_dev);
653 return error;
654 }
655
656 transport_add_device(dev);
657 transport_configure_device(dev);
658 return 0;
659}
660
661
662/*
663 * Setup / Teardown code
664 */
665
666#define SETUP_TEMPLATE(attrb, field, perm, test) \
667 i->private_##attrb[count] = dev_attr_##field; \
668 i->private_##attrb[count].attr.mode = perm; \
669 i->attrb[count] = &i->private_##attrb[count]; \
670 if (test) \
671 count++
672
673#define SETUP_LINK_ATTRIBUTE(field) \
674 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
675
676#define SETUP_PORT_ATTRIBUTE(field) \
677 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
678
679#define SETUP_DEV_ATTRIBUTE(field) \
680 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
681
682/**
683 * ata_attach_transport -- instantiate ATA transport template
684 */
685struct scsi_transport_template *ata_attach_transport(void)
686{
687 struct ata_internal *i;
688 int count;
689
690 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
691 if (!i)
692 return NULL;
693
694 i->t.eh_strategy_handler = ata_scsi_error;
695 i->t.eh_timed_out = ata_scsi_timed_out;
696 i->t.user_scan = ata_scsi_user_scan;
697
698 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
699 i->t.host_attrs.ac.class = &ata_port_class.class;
700 i->t.host_attrs.ac.match = ata_tport_match;
701 transport_container_register(&i->t.host_attrs);
702
703 i->link_attr_cont.ac.class = &ata_link_class.class;
704 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
705 i->link_attr_cont.ac.match = ata_tlink_match;
706 transport_container_register(&i->link_attr_cont);
707
708 i->dev_attr_cont.ac.class = &ata_dev_class.class;
709 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
710 i->dev_attr_cont.ac.match = ata_tdev_match;
711 transport_container_register(&i->dev_attr_cont);
712
713 count = 0;
714 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
715 SETUP_PORT_ATTRIBUTE(idle_irq);
e628dc99 716 SETUP_PORT_ATTRIBUTE(port_no);
d9027470
GG		 717 BUG_ON(count > ATA_PORT_ATTRS);
718 i->port_attrs[count] = NULL;
719
720 count = 0;
721 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
722 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
723 SETUP_LINK_ATTRIBUTE(sata_spd);
724 BUG_ON(count > ATA_LINK_ATTRS);
725 i->link_attrs[count] = NULL;
726
727 count = 0;
728 SETUP_DEV_ATTRIBUTE(class);
729 SETUP_DEV_ATTRIBUTE(pio_mode);
730 SETUP_DEV_ATTRIBUTE(dma_mode);
731 SETUP_DEV_ATTRIBUTE(xfer_mode);
732 SETUP_DEV_ATTRIBUTE(spdn_cnt);
733 SETUP_DEV_ATTRIBUTE(ering);
734 SETUP_DEV_ATTRIBUTE(id);
735 SETUP_DEV_ATTRIBUTE(gscr);
736 BUG_ON(count > ATA_DEV_ATTRS);
737 i->dev_attrs[count] = NULL;
738
739 return &i->t;
740}
741
742/**
743 * ata_release_transport -- release ATA transport template instance
744 * @t: transport template instance
745 */
746void ata_release_transport(struct scsi_transport_template *t)
747{
748 struct ata_internal *i = to_ata_internal(t);
749
750 transport_container_unregister(&i->t.host_attrs);
751 transport_container_unregister(&i->link_attr_cont);
752 transport_container_unregister(&i->dev_attr_cont);
753
754 kfree(i);
755}
756
757__init int libata_transport_init(void)
758{
759 int error;
760
761 error = transport_class_register(&ata_link_class);
762 if (error)
763 goto out_unregister_transport;
764 error = transport_class_register(&ata_port_class);
765 if (error)
766 goto out_unregister_link;
767 error = transport_class_register(&ata_dev_class);
768 if (error)
769 goto out_unregister_port;
770 return 0;
771
772 out_unregister_port:
773 transport_class_unregister(&ata_port_class);
774 out_unregister_link:
775 transport_class_unregister(&ata_link_class);
776 out_unregister_transport:
777 return error;
778
779}
780
781void __exit libata_transport_exit(void)
782{
783 transport_class_unregister(&ata_link_class);
784 transport_class_unregister(&ata_port_class);
785 transport_class_unregister(&ata_dev_class);
786}
Linux kernel - Deliverables
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