blob: 74aaee30e264ce1959c3807cb6a9e4c8bad27c95 [file] [log] [blame]
Gwendal Grignoud9027472010-05-25 12:31:38 -07001/*
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>
Jeff Garzik6a2148c2010-08-19 16:11:32 -040030#include <linux/slab.h>
Gwendal Grignoud9027472010-05-25 12:31:38 -070031#include <scsi/scsi_transport.h>
32#include <linux/libata.h>
33#include <linux/hdreg.h>
34#include <linux/uaccess.h>
Lin Ming9ee4f392011-12-05 09:20:28 +080035#include <linux/pm_runtime.h>
Gwendal Grignoud9027472010-05-25 12:31:38 -070036
37#include "libata.h"
38#include "libata-transport.h"
39
40#define ATA_PORT_ATTRS 2
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" },
146 { ATA_DEV_NONE, "none" }
147};
148ata_bitfield_name_search(class, ata_class_names)
149
150
151static struct {
152 u32 value;
153 char *name;
154} ata_err_names[] = {
155 { AC_ERR_DEV, "DeviceError" },
156 { AC_ERR_HSM, "HostStateMachineError" },
157 { AC_ERR_TIMEOUT, "Timeout" },
158 { AC_ERR_MEDIA, "MediaError" },
159 { AC_ERR_ATA_BUS, "BusError" },
160 { AC_ERR_HOST_BUS, "HostBusError" },
161 { AC_ERR_SYSTEM, "SystemError" },
162 { AC_ERR_INVALID, "InvalidArg" },
163 { AC_ERR_OTHER, "Unknown" },
164 { AC_ERR_NODEV_HINT, "NoDeviceHint" },
165 { AC_ERR_NCQ, "NCQError" }
166};
167ata_bitfield_name_match(err, ata_err_names)
168
169static struct {
170 u32 value;
171 char *name;
172} ata_xfer_names[] = {
173 { XFER_UDMA_7, "XFER_UDMA_7" },
174 { XFER_UDMA_6, "XFER_UDMA_6" },
175 { XFER_UDMA_5, "XFER_UDMA_5" },
176 { XFER_UDMA_4, "XFER_UDMA_4" },
177 { XFER_UDMA_3, "XFER_UDMA_3" },
178 { XFER_UDMA_2, "XFER_UDMA_2" },
179 { XFER_UDMA_1, "XFER_UDMA_1" },
180 { XFER_UDMA_0, "XFER_UDMA_0" },
181 { XFER_MW_DMA_4, "XFER_MW_DMA_4" },
182 { XFER_MW_DMA_3, "XFER_MW_DMA_3" },
183 { XFER_MW_DMA_2, "XFER_MW_DMA_2" },
184 { XFER_MW_DMA_1, "XFER_MW_DMA_1" },
185 { XFER_MW_DMA_0, "XFER_MW_DMA_0" },
186 { XFER_SW_DMA_2, "XFER_SW_DMA_2" },
187 { XFER_SW_DMA_1, "XFER_SW_DMA_1" },
188 { XFER_SW_DMA_0, "XFER_SW_DMA_0" },
189 { XFER_PIO_6, "XFER_PIO_6" },
190 { XFER_PIO_5, "XFER_PIO_5" },
191 { XFER_PIO_4, "XFER_PIO_4" },
192 { XFER_PIO_3, "XFER_PIO_3" },
193 { XFER_PIO_2, "XFER_PIO_2" },
194 { XFER_PIO_1, "XFER_PIO_1" },
195 { XFER_PIO_0, "XFER_PIO_0" },
196 { XFER_PIO_SLOW, "XFER_PIO_SLOW" }
197};
198ata_bitfield_name_match(xfer,ata_xfer_names)
199
200/*
201 * ATA Port attributes
202 */
203#define ata_port_show_simple(field, name, format_string, cast) \
204static ssize_t \
205show_ata_port_##name(struct device *dev, \
206 struct device_attribute *attr, char *buf) \
207{ \
208 struct ata_port *ap = transport_class_to_port(dev); \
209 \
210 return snprintf(buf, 20, format_string, cast ap->field); \
211}
212
213#define ata_port_simple_attr(field, name, format_string, type) \
214 ata_port_show_simple(field, name, format_string, (type)) \
215static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
216
217ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
218ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
219
220static DECLARE_TRANSPORT_CLASS(ata_port_class,
221 "ata_port", NULL, NULL, NULL);
222
223static void ata_tport_release(struct device *dev)
224{
225 put_device(dev->parent);
226}
227
228/**
229 * ata_is_port -- check if a struct device represents a ATA port
230 * @dev: device to check
231 *
232 * Returns:
233 * %1 if the device represents a ATA Port, %0 else
234 */
235int ata_is_port(const struct device *dev)
236{
237 return dev->release == ata_tport_release;
238}
239
240static int ata_tport_match(struct attribute_container *cont,
241 struct device *dev)
242{
243 if (!ata_is_port(dev))
244 return 0;
245 return &ata_scsi_transport_template->host_attrs.ac == cont;
246}
247
248/**
249 * ata_tport_delete -- remove ATA PORT
250 * @port: ATA PORT to remove
251 *
252 * Removes the specified ATA PORT. Remove the associated link as well.
253 */
254void ata_tport_delete(struct ata_port *ap)
255{
256 struct device *dev = &ap->tdev;
257
258 ata_tlink_delete(&ap->link);
259
260 transport_remove_device(dev);
261 device_del(dev);
262 transport_destroy_device(dev);
263 put_device(dev);
264}
265
266/** ata_tport_add - initialize a transport ATA port structure
267 *
268 * @parent: parent device
269 * @ap: existing ata_port structure
270 *
271 * Initialize a ATA port structure for sysfs. It will be added to the device
272 * tree below the device specified by @parent which could be a PCI device.
273 *
274 * Returns %0 on success
275 */
276int ata_tport_add(struct device *parent,
277 struct ata_port *ap)
278{
279 int error;
280 struct device *dev = &ap->tdev;
281
282 device_initialize(dev);
Lin Ming5ef41082011-12-05 09:20:27 +0800283 dev->type = &ata_port_type;
Gwendal Grignoud9027472010-05-25 12:31:38 -0700284
285 dev->parent = get_device(parent);
286 dev->release = ata_tport_release;
287 dev_set_name(dev, "ata%d", ap->print_id);
288 transport_setup_device(dev);
289 error = device_add(dev);
290 if (error) {
291 goto tport_err;
292 }
293
Lin Ming966f1212012-01-16 13:23:23 +0800294 device_enable_async_suspend(dev);
Lin Ming9ee4f392011-12-05 09:20:28 +0800295 pm_runtime_set_active(dev);
296 pm_runtime_enable(dev);
297
Gwendal Grignoud9027472010-05-25 12:31:38 -0700298 transport_add_device(dev);
299 transport_configure_device(dev);
300
301 error = ata_tlink_add(&ap->link);
302 if (error) {
303 goto tport_link_err;
304 }
305 return 0;
306
307 tport_link_err:
308 transport_remove_device(dev);
309 device_del(dev);
310
311 tport_err:
312 transport_destroy_device(dev);
313 put_device(dev);
314 return error;
315}
316
317
318/*
319 * ATA link attributes
320 */
321
322
323#define ata_link_show_linkspeed(field) \
324static ssize_t \
325show_ata_link_##field(struct device *dev, \
326 struct device_attribute *attr, char *buf) \
327{ \
328 struct ata_link *link = transport_class_to_link(dev); \
329 \
330 return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \
331}
332
333#define ata_link_linkspeed_attr(field) \
334 ata_link_show_linkspeed(field) \
335static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
336
337ata_link_linkspeed_attr(hw_sata_spd_limit);
338ata_link_linkspeed_attr(sata_spd_limit);
339ata_link_linkspeed_attr(sata_spd);
340
341
342static DECLARE_TRANSPORT_CLASS(ata_link_class,
343 "ata_link", NULL, NULL, NULL);
344
345static void ata_tlink_release(struct device *dev)
346{
347 put_device(dev->parent);
348}
349
350/**
351 * ata_is_link -- check if a struct device represents a ATA link
352 * @dev: device to check
353 *
354 * Returns:
355 * %1 if the device represents a ATA link, %0 else
356 */
357int ata_is_link(const struct device *dev)
358{
359 return dev->release == ata_tlink_release;
360}
361
362static int ata_tlink_match(struct attribute_container *cont,
363 struct device *dev)
364{
365 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
366 if (!ata_is_link(dev))
367 return 0;
368 return &i->link_attr_cont.ac == cont;
369}
370
371/**
372 * ata_tlink_delete -- remove ATA LINK
373 * @port: ATA LINK to remove
374 *
375 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
376 */
377void ata_tlink_delete(struct ata_link *link)
378{
379 struct device *dev = &link->tdev;
380 struct ata_device *ata_dev;
381
382 ata_for_each_dev(ata_dev, link, ALL) {
383 ata_tdev_delete(ata_dev);
384 }
385
386 transport_remove_device(dev);
387 device_del(dev);
388 transport_destroy_device(dev);
389 put_device(dev);
390}
391
392/**
393 * ata_tlink_add -- initialize a transport ATA link structure
394 * @link: allocated ata_link structure.
395 *
396 * Initialize an ATA LINK structure for sysfs. It will be added in the
397 * device tree below the ATA PORT it belongs to.
398 *
399 * Returns %0 on success
400 */
401int ata_tlink_add(struct ata_link *link)
402{
403 struct device *dev = &link->tdev;
404 struct ata_port *ap = link->ap;
405 struct ata_device *ata_dev;
406 int error;
407
408 device_initialize(dev);
409 dev->parent = get_device(&ap->tdev);
410 dev->release = ata_tlink_release;
411 if (ata_is_host_link(link))
412 dev_set_name(dev, "link%d", ap->print_id);
413 else
414 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
415
416 transport_setup_device(dev);
417
418 error = device_add(dev);
419 if (error) {
420 goto tlink_err;
421 }
422
423 transport_add_device(dev);
424 transport_configure_device(dev);
425
426 ata_for_each_dev(ata_dev, link, ALL) {
427 error = ata_tdev_add(ata_dev);
428 if (error) {
429 goto tlink_dev_err;
430 }
431 }
432 return 0;
433 tlink_dev_err:
434 while (--ata_dev >= link->device) {
435 ata_tdev_delete(ata_dev);
436 }
437 transport_remove_device(dev);
438 device_del(dev);
439 tlink_err:
440 transport_destroy_device(dev);
441 put_device(dev);
442 return error;
443}
444
445/*
446 * ATA device attributes
447 */
448
449#define ata_dev_show_class(title, field) \
450static ssize_t \
451show_ata_dev_##field(struct device *dev, \
452 struct device_attribute *attr, char *buf) \
453{ \
454 struct ata_device *ata_dev = transport_class_to_dev(dev); \
455 \
456 return get_ata_##title##_names(ata_dev->field, buf); \
457}
458
459#define ata_dev_attr(title, field) \
460 ata_dev_show_class(title, field) \
461static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
462
463ata_dev_attr(class, class);
464ata_dev_attr(xfer, pio_mode);
465ata_dev_attr(xfer, dma_mode);
466ata_dev_attr(xfer, xfer_mode);
467
468
469#define ata_dev_show_simple(field, format_string, cast) \
470static ssize_t \
471show_ata_dev_##field(struct device *dev, \
472 struct device_attribute *attr, char *buf) \
473{ \
474 struct ata_device *ata_dev = transport_class_to_dev(dev); \
475 \
476 return snprintf(buf, 20, format_string, cast ata_dev->field); \
477}
478
479#define ata_dev_simple_attr(field, format_string, type) \
480 ata_dev_show_simple(field, format_string, (type)) \
481static DEVICE_ATTR(field, S_IRUGO, \
482 show_ata_dev_##field, NULL)
483
484ata_dev_simple_attr(spdn_cnt, "%d\n", int);
485
486struct ata_show_ering_arg {
487 char* buf;
488 int written;
489};
490
491static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
492{
493 struct ata_show_ering_arg* arg = void_arg;
494 struct timespec time;
495
496 jiffies_to_timespec(ent->timestamp,&time);
497 arg->written += sprintf(arg->buf + arg->written,
498 "[%5lu.%06lu]",
499 time.tv_sec, time.tv_nsec);
500 arg->written += get_ata_err_names(ent->err_mask,
501 arg->buf + arg->written);
502 return 0;
503}
504
505static ssize_t
506show_ata_dev_ering(struct device *dev,
507 struct device_attribute *attr, char *buf)
508{
509 struct ata_device *ata_dev = transport_class_to_dev(dev);
510 struct ata_show_ering_arg arg = { buf, 0 };
511
512 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
513 return arg.written;
514}
515
516
517static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
518
519static ssize_t
520show_ata_dev_id(struct device *dev,
521 struct device_attribute *attr, char *buf)
522{
523 struct ata_device *ata_dev = transport_class_to_dev(dev);
524 int written = 0, i = 0;
525
526 if (ata_dev->class == ATA_DEV_PMP)
527 return 0;
528 for(i=0;i<ATA_ID_WORDS;i++) {
529 written += snprintf(buf+written, 20, "%04x%c",
530 ata_dev->id[i],
531 ((i+1) & 7) ? ' ' : '\n');
532 }
533 return written;
534}
535
536static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
537
538static ssize_t
539show_ata_dev_gscr(struct device *dev,
540 struct device_attribute *attr, char *buf)
541{
542 struct ata_device *ata_dev = transport_class_to_dev(dev);
543 int written = 0, i = 0;
544
545 if (ata_dev->class != ATA_DEV_PMP)
546 return 0;
547 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
548 written += snprintf(buf+written, 20, "%08x%c",
549 ata_dev->gscr[i],
550 ((i+1) & 3) ? ' ' : '\n');
551 }
552 if (SATA_PMP_GSCR_DWORDS & 3)
553 buf[written-1] = '\n';
554 return written;
555}
556
557static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
558
559static DECLARE_TRANSPORT_CLASS(ata_dev_class,
560 "ata_device", NULL, NULL, NULL);
561
562static void ata_tdev_release(struct device *dev)
563{
564 put_device(dev->parent);
565}
566
567/**
568 * ata_is_ata_dev -- check if a struct device represents a ATA device
569 * @dev: device to check
570 *
571 * Returns:
572 * %1 if the device represents a ATA device, %0 else
573 */
574int ata_is_ata_dev(const struct device *dev)
575{
576 return dev->release == ata_tdev_release;
577}
578
579static int ata_tdev_match(struct attribute_container *cont,
580 struct device *dev)
581{
582 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
583 if (!ata_is_ata_dev(dev))
584 return 0;
585 return &i->dev_attr_cont.ac == cont;
586}
587
588/**
589 * ata_tdev_free -- free a ATA LINK
590 * @dev: ATA PHY to free
591 *
592 * Frees the specified ATA PHY.
593 *
594 * Note:
595 * This function must only be called on a PHY that has not
596 * successfully been added using ata_tdev_add().
597 */
598static void ata_tdev_free(struct ata_device *dev)
599{
600 transport_destroy_device(&dev->tdev);
601 put_device(&dev->tdev);
602}
603
604/**
605 * ata_tdev_delete -- remove ATA device
606 * @port: ATA PORT to remove
607 *
608 * Removes the specified ATA device.
609 */
610static void ata_tdev_delete(struct ata_device *ata_dev)
611{
612 struct device *dev = &ata_dev->tdev;
613
614 transport_remove_device(dev);
615 device_del(dev);
616 ata_tdev_free(ata_dev);
617}
618
619
620/**
621 * ata_tdev_add -- initialize a transport ATA device structure.
622 * @ata_dev: ata_dev structure.
623 *
624 * Initialize an ATA device structure for sysfs. It will be added in the
625 * device tree below the ATA LINK device it belongs to.
626 *
627 * Returns %0 on success
628 */
629static int ata_tdev_add(struct ata_device *ata_dev)
630{
631 struct device *dev = &ata_dev->tdev;
632 struct ata_link *link = ata_dev->link;
633 struct ata_port *ap = link->ap;
634 int error;
635
636 device_initialize(dev);
637 dev->parent = get_device(&link->tdev);
638 dev->release = ata_tdev_release;
639 if (ata_is_host_link(link))
640 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
641 else
642 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
643
644 transport_setup_device(dev);
645 error = device_add(dev);
646 if (error) {
647 ata_tdev_free(ata_dev);
648 return error;
649 }
650
651 transport_add_device(dev);
652 transport_configure_device(dev);
653 return 0;
654}
655
656
657/*
658 * Setup / Teardown code
659 */
660
661#define SETUP_TEMPLATE(attrb, field, perm, test) \
662 i->private_##attrb[count] = dev_attr_##field; \
663 i->private_##attrb[count].attr.mode = perm; \
664 i->attrb[count] = &i->private_##attrb[count]; \
665 if (test) \
666 count++
667
668#define SETUP_LINK_ATTRIBUTE(field) \
669 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
670
671#define SETUP_PORT_ATTRIBUTE(field) \
672 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
673
674#define SETUP_DEV_ATTRIBUTE(field) \
675 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
676
677/**
678 * ata_attach_transport -- instantiate ATA transport template
679 */
680struct scsi_transport_template *ata_attach_transport(void)
681{
682 struct ata_internal *i;
683 int count;
684
685 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
686 if (!i)
687 return NULL;
688
689 i->t.eh_strategy_handler = ata_scsi_error;
690 i->t.eh_timed_out = ata_scsi_timed_out;
691 i->t.user_scan = ata_scsi_user_scan;
692
693 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
694 i->t.host_attrs.ac.class = &ata_port_class.class;
695 i->t.host_attrs.ac.match = ata_tport_match;
696 transport_container_register(&i->t.host_attrs);
697
698 i->link_attr_cont.ac.class = &ata_link_class.class;
699 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
700 i->link_attr_cont.ac.match = ata_tlink_match;
701 transport_container_register(&i->link_attr_cont);
702
703 i->dev_attr_cont.ac.class = &ata_dev_class.class;
704 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
705 i->dev_attr_cont.ac.match = ata_tdev_match;
706 transport_container_register(&i->dev_attr_cont);
707
708 count = 0;
709 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
710 SETUP_PORT_ATTRIBUTE(idle_irq);
711 BUG_ON(count > ATA_PORT_ATTRS);
712 i->port_attrs[count] = NULL;
713
714 count = 0;
715 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
716 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
717 SETUP_LINK_ATTRIBUTE(sata_spd);
718 BUG_ON(count > ATA_LINK_ATTRS);
719 i->link_attrs[count] = NULL;
720
721 count = 0;
722 SETUP_DEV_ATTRIBUTE(class);
723 SETUP_DEV_ATTRIBUTE(pio_mode);
724 SETUP_DEV_ATTRIBUTE(dma_mode);
725 SETUP_DEV_ATTRIBUTE(xfer_mode);
726 SETUP_DEV_ATTRIBUTE(spdn_cnt);
727 SETUP_DEV_ATTRIBUTE(ering);
728 SETUP_DEV_ATTRIBUTE(id);
729 SETUP_DEV_ATTRIBUTE(gscr);
730 BUG_ON(count > ATA_DEV_ATTRS);
731 i->dev_attrs[count] = NULL;
732
733 return &i->t;
734}
735
736/**
737 * ata_release_transport -- release ATA transport template instance
738 * @t: transport template instance
739 */
740void ata_release_transport(struct scsi_transport_template *t)
741{
742 struct ata_internal *i = to_ata_internal(t);
743
744 transport_container_unregister(&i->t.host_attrs);
745 transport_container_unregister(&i->link_attr_cont);
746 transport_container_unregister(&i->dev_attr_cont);
747
748 kfree(i);
749}
750
751__init int libata_transport_init(void)
752{
753 int error;
754
755 error = transport_class_register(&ata_link_class);
756 if (error)
757 goto out_unregister_transport;
758 error = transport_class_register(&ata_port_class);
759 if (error)
760 goto out_unregister_link;
761 error = transport_class_register(&ata_dev_class);
762 if (error)
763 goto out_unregister_port;
764 return 0;
765
766 out_unregister_port:
767 transport_class_unregister(&ata_port_class);
768 out_unregister_link:
769 transport_class_unregister(&ata_link_class);
770 out_unregister_transport:
771 return error;
772
773}
774
775void __exit libata_transport_exit(void)
776{
777 transport_class_unregister(&ata_link_class);
778 transport_class_unregister(&ata_port_class);
779 transport_class_unregister(&ata_dev_class);
780}