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#include <linux/pm_runtime.h>
36
37#include "libata.h"
38#include "libata-transport.h"
39
40#define ATA_PORT_ATTRS 3
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_ZAC, "zac" },
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);
220ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int);
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 struct ata_port *ap = tdev_to_port(dev);
228 ata_host_put(ap->host);
229}
230
231/**
232 * ata_is_port -- check if a struct device represents a ATA port
233 * @dev: device to check
234 *
235 * Returns:
236 * %1 if the device represents a ATA Port, %0 else
237 */
238static int ata_is_port(const struct device *dev)
239{
240 return dev->release == ata_tport_release;
241}
242
243static int ata_tport_match(struct attribute_container *cont,
244 struct device *dev)
245{
246 if (!ata_is_port(dev))
247 return 0;
248 return &ata_scsi_transport_template->host_attrs.ac == cont;
249}
250
251/**
252 * ata_tport_delete -- remove ATA PORT
253 * @port: ATA PORT to remove
254 *
255 * Removes the specified ATA PORT. Remove the associated link as well.
256 */
257void ata_tport_delete(struct ata_port *ap)
258{
259 struct device *dev = &ap->tdev;
260
261 ata_tlink_delete(&ap->link);
262
263 transport_remove_device(dev);
264 device_del(dev);
265 transport_destroy_device(dev);
266 put_device(dev);
267}
268
269/** ata_tport_add - initialize a transport ATA port structure
270 *
271 * @parent: parent device
272 * @ap: existing ata_port structure
273 *
274 * Initialize a ATA port structure for sysfs. It will be added to the device
275 * tree below the device specified by @parent which could be a PCI device.
276 *
277 * Returns %0 on success
278 */
279int ata_tport_add(struct device *parent,
280 struct ata_port *ap)
281{
282 int error;
283 struct device *dev = &ap->tdev;
284
285 device_initialize(dev);
286 dev->type = &ata_port_type;
287
288 dev->parent = parent;
289 ata_host_get(ap->host);
290 dev->release = ata_tport_release;
291 dev_set_name(dev, "ata%d", ap->print_id);
292 transport_setup_device(dev);
293 ata_acpi_bind_port(ap);
294 error = device_add(dev);
295 if (error) {
296 goto tport_err;
297 }
298
299 device_enable_async_suspend(dev);
300 pm_runtime_set_active(dev);
301 pm_runtime_enable(dev);
302 pm_runtime_forbid(dev);
303
304 transport_add_device(dev);
305 transport_configure_device(dev);
306
307 error = ata_tlink_add(&ap->link);
308 if (error) {
309 goto tport_link_err;
310 }
311 return 0;
312
313 tport_link_err:
314 transport_remove_device(dev);
315 device_del(dev);
316
317 tport_err:
318 transport_destroy_device(dev);
319 put_device(dev);
320 ata_host_put(ap->host);
321 return error;
322}
323
324
325/*
326 * ATA link attributes
327 */
328static int noop(int x) { return x; }
329
330#define ata_link_show_linkspeed(field, format) \
331static ssize_t \
332show_ata_link_##field(struct device *dev, \
333 struct device_attribute *attr, char *buf) \
334{ \
335 struct ata_link *link = transport_class_to_link(dev); \
336 \
337 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \
338}
339
340#define ata_link_linkspeed_attr(field, format) \
341 ata_link_show_linkspeed(field, format) \
342static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
343
344ata_link_linkspeed_attr(hw_sata_spd_limit, fls);
345ata_link_linkspeed_attr(sata_spd_limit, fls);
346ata_link_linkspeed_attr(sata_spd, noop);
347
348
349static DECLARE_TRANSPORT_CLASS(ata_link_class,
350 "ata_link", NULL, NULL, NULL);
351
352static void ata_tlink_release(struct device *dev)
353{
354}
355
356/**
357 * ata_is_link -- check if a struct device represents a ATA link
358 * @dev: device to check
359 *
360 * Returns:
361 * %1 if the device represents a ATA link, %0 else
362 */
363static int ata_is_link(const struct device *dev)
364{
365 return dev->release == ata_tlink_release;
366}
367
368static int ata_tlink_match(struct attribute_container *cont,
369 struct device *dev)
370{
371 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
372 if (!ata_is_link(dev))
373 return 0;
374 return &i->link_attr_cont.ac == cont;
375}
376
377/**
378 * ata_tlink_delete -- remove ATA LINK
379 * @port: ATA LINK to remove
380 *
381 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
382 */
383void ata_tlink_delete(struct ata_link *link)
384{
385 struct device *dev = &link->tdev;
386 struct ata_device *ata_dev;
387
388 ata_for_each_dev(ata_dev, link, ALL) {
389 ata_tdev_delete(ata_dev);
390 }
391
392 transport_remove_device(dev);
393 device_del(dev);
394 transport_destroy_device(dev);
395 put_device(dev);
396}
397
398/**
399 * ata_tlink_add -- initialize a transport ATA link structure
400 * @link: allocated ata_link structure.
401 *
402 * Initialize an ATA LINK structure for sysfs. It will be added in the
403 * device tree below the ATA PORT it belongs to.
404 *
405 * Returns %0 on success
406 */
407int ata_tlink_add(struct ata_link *link)
408{
409 struct device *dev = &link->tdev;
410 struct ata_port *ap = link->ap;
411 struct ata_device *ata_dev;
412 int error;
413
414 device_initialize(dev);
415 dev->parent = &ap->tdev;
416 dev->release = ata_tlink_release;
417 if (ata_is_host_link(link))
418 dev_set_name(dev, "link%d", ap->print_id);
419 else
420 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
421
422 transport_setup_device(dev);
423
424 error = device_add(dev);
425 if (error) {
426 goto tlink_err;
427 }
428
429 transport_add_device(dev);
430 transport_configure_device(dev);
431
432 ata_for_each_dev(ata_dev, link, ALL) {
433 error = ata_tdev_add(ata_dev);
434 if (error) {
435 goto tlink_dev_err;
436 }
437 }
438 return 0;
439 tlink_dev_err:
440 while (--ata_dev >= link->device) {
441 ata_tdev_delete(ata_dev);
442 }
443 transport_remove_device(dev);
444 device_del(dev);
445 tlink_err:
446 transport_destroy_device(dev);
447 put_device(dev);
448 return error;
449}
450
451/*
452 * ATA device attributes
453 */
454
455#define ata_dev_show_class(title, field) \
456static ssize_t \
457show_ata_dev_##field(struct device *dev, \
458 struct device_attribute *attr, char *buf) \
459{ \
460 struct ata_device *ata_dev = transport_class_to_dev(dev); \
461 \
462 return get_ata_##title##_names(ata_dev->field, buf); \
463}
464
465#define ata_dev_attr(title, field) \
466 ata_dev_show_class(title, field) \
467static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
468
469ata_dev_attr(class, class);
470ata_dev_attr(xfer, pio_mode);
471ata_dev_attr(xfer, dma_mode);
472ata_dev_attr(xfer, xfer_mode);
473
474
475#define ata_dev_show_simple(field, format_string, cast) \
476static ssize_t \
477show_ata_dev_##field(struct device *dev, \
478 struct device_attribute *attr, char *buf) \
479{ \
480 struct ata_device *ata_dev = transport_class_to_dev(dev); \
481 \
482 return snprintf(buf, 20, format_string, cast ata_dev->field); \
483}
484
485#define ata_dev_simple_attr(field, format_string, type) \
486 ata_dev_show_simple(field, format_string, (type)) \
487static DEVICE_ATTR(field, S_IRUGO, \
488 show_ata_dev_##field, NULL)
489
490ata_dev_simple_attr(spdn_cnt, "%d\n", int);
491
492struct ata_show_ering_arg {
493 char* buf;
494 int written;
495};
496
497static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
498{
499 struct ata_show_ering_arg* arg = void_arg;
500 u64 seconds;
501 u32 rem;
502
503 seconds = div_u64_rem(ent->timestamp, HZ, &rem);
504 arg->written += sprintf(arg->buf + arg->written,
505 "[%5llu.%09lu]", seconds,
506 rem * NSEC_PER_SEC / HZ);
507 arg->written += get_ata_err_names(ent->err_mask,
508 arg->buf + arg->written);
509 return 0;
510}
511
512static ssize_t
513show_ata_dev_ering(struct device *dev,
514 struct device_attribute *attr, char *buf)
515{
516 struct ata_device *ata_dev = transport_class_to_dev(dev);
517 struct ata_show_ering_arg arg = { buf, 0 };
518
519 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
520 return arg.written;
521}
522
523
524static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
525
526static ssize_t
527show_ata_dev_id(struct device *dev,
528 struct device_attribute *attr, char *buf)
529{
530 struct ata_device *ata_dev = transport_class_to_dev(dev);
531 int written = 0, i = 0;
532
533 if (ata_dev->class == ATA_DEV_PMP)
534 return 0;
535 for(i=0;i<ATA_ID_WORDS;i++) {
536 written += snprintf(buf+written, 20, "%04x%c",
537 ata_dev->id[i],
538 ((i+1) & 7) ? ' ' : '\n');
539 }
540 return written;
541}
542
543static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
544
545static ssize_t
546show_ata_dev_gscr(struct device *dev,
547 struct device_attribute *attr, char *buf)
548{
549 struct ata_device *ata_dev = transport_class_to_dev(dev);
550 int written = 0, i = 0;
551
552 if (ata_dev->class != ATA_DEV_PMP)
553 return 0;
554 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
555 written += snprintf(buf+written, 20, "%08x%c",
556 ata_dev->gscr[i],
557 ((i+1) & 3) ? ' ' : '\n');
558 }
559 if (SATA_PMP_GSCR_DWORDS & 3)
560 buf[written-1] = '\n';
561 return written;
562}
563
564static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
565
566static ssize_t
567show_ata_dev_trim(struct device *dev,
568 struct device_attribute *attr, char *buf)
569{
570 struct ata_device *ata_dev = transport_class_to_dev(dev);
571 unsigned char *mode;
572
573 if (!ata_id_has_trim(ata_dev->id))
574 mode = "unsupported";
575 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM)
576 mode = "forced_unsupported";
577 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM)
578 mode = "forced_unqueued";
579 else if (ata_fpdma_dsm_supported(ata_dev))
580 mode = "queued";
581 else
582 mode = "unqueued";
583
584 return snprintf(buf, 20, "%s\n", mode);
585}
586
587static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL);
588
589static DECLARE_TRANSPORT_CLASS(ata_dev_class,
590 "ata_device", NULL, NULL, NULL);
591
592static void ata_tdev_release(struct device *dev)
593{
594}
595
596/**
597 * ata_is_ata_dev -- check if a struct device represents a ATA device
598 * @dev: device to check
599 *
600 * Returns:
601 * %1 if the device represents a ATA device, %0 else
602 */
603static int ata_is_ata_dev(const struct device *dev)
604{
605 return dev->release == ata_tdev_release;
606}
607
608static int ata_tdev_match(struct attribute_container *cont,
609 struct device *dev)
610{
611 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
612 if (!ata_is_ata_dev(dev))
613 return 0;
614 return &i->dev_attr_cont.ac == cont;
615}
616
617/**
618 * ata_tdev_free -- free a ATA LINK
619 * @dev: ATA PHY to free
620 *
621 * Frees the specified ATA PHY.
622 *
623 * Note:
624 * This function must only be called on a PHY that has not
625 * successfully been added using ata_tdev_add().
626 */
627static void ata_tdev_free(struct ata_device *dev)
628{
629 transport_destroy_device(&dev->tdev);
630 put_device(&dev->tdev);
631}
632
633/**
634 * ata_tdev_delete -- remove ATA device
635 * @port: ATA PORT to remove
636 *
637 * Removes the specified ATA device.
638 */
639static void ata_tdev_delete(struct ata_device *ata_dev)
640{
641 struct device *dev = &ata_dev->tdev;
642
643 transport_remove_device(dev);
644 device_del(dev);
645 ata_tdev_free(ata_dev);
646}
647
648
649/**
650 * ata_tdev_add -- initialize a transport ATA device structure.
651 * @ata_dev: ata_dev structure.
652 *
653 * Initialize an ATA device structure for sysfs. It will be added in the
654 * device tree below the ATA LINK device it belongs to.
655 *
656 * Returns %0 on success
657 */
658static int ata_tdev_add(struct ata_device *ata_dev)
659{
660 struct device *dev = &ata_dev->tdev;
661 struct ata_link *link = ata_dev->link;
662 struct ata_port *ap = link->ap;
663 int error;
664
665 device_initialize(dev);
666 dev->parent = &link->tdev;
667 dev->release = ata_tdev_release;
668 if (ata_is_host_link(link))
669 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
670 else
671 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
672
673 transport_setup_device(dev);
674 ata_acpi_bind_dev(ata_dev);
675 error = device_add(dev);
676 if (error) {
677 ata_tdev_free(ata_dev);
678 return error;
679 }
680
681 transport_add_device(dev);
682 transport_configure_device(dev);
683 return 0;
684}
685
686
687/*
688 * Setup / Teardown code
689 */
690
691#define SETUP_TEMPLATE(attrb, field, perm, test) \
692 i->private_##attrb[count] = dev_attr_##field; \
693 i->private_##attrb[count].attr.mode = perm; \
694 i->attrb[count] = &i->private_##attrb[count]; \
695 if (test) \
696 count++
697
698#define SETUP_LINK_ATTRIBUTE(field) \
699 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
700
701#define SETUP_PORT_ATTRIBUTE(field) \
702 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
703
704#define SETUP_DEV_ATTRIBUTE(field) \
705 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
706
707/**
708 * ata_attach_transport -- instantiate ATA transport template
709 */
710struct scsi_transport_template *ata_attach_transport(void)
711{
712 struct ata_internal *i;
713 int count;
714
715 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
716 if (!i)
717 return NULL;
718
719 i->t.eh_strategy_handler = ata_scsi_error;
720 i->t.user_scan = ata_scsi_user_scan;
721
722 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
723 i->t.host_attrs.ac.class = &ata_port_class.class;
724 i->t.host_attrs.ac.match = ata_tport_match;
725 transport_container_register(&i->t.host_attrs);
726
727 i->link_attr_cont.ac.class = &ata_link_class.class;
728 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
729 i->link_attr_cont.ac.match = ata_tlink_match;
730 transport_container_register(&i->link_attr_cont);
731
732 i->dev_attr_cont.ac.class = &ata_dev_class.class;
733 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
734 i->dev_attr_cont.ac.match = ata_tdev_match;
735 transport_container_register(&i->dev_attr_cont);
736
737 count = 0;
738 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
739 SETUP_PORT_ATTRIBUTE(idle_irq);
740 SETUP_PORT_ATTRIBUTE(port_no);
741 BUG_ON(count > ATA_PORT_ATTRS);
742 i->port_attrs[count] = NULL;
743
744 count = 0;
745 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
746 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
747 SETUP_LINK_ATTRIBUTE(sata_spd);
748 BUG_ON(count > ATA_LINK_ATTRS);
749 i->link_attrs[count] = NULL;
750
751 count = 0;
752 SETUP_DEV_ATTRIBUTE(class);
753 SETUP_DEV_ATTRIBUTE(pio_mode);
754 SETUP_DEV_ATTRIBUTE(dma_mode);
755 SETUP_DEV_ATTRIBUTE(xfer_mode);
756 SETUP_DEV_ATTRIBUTE(spdn_cnt);
757 SETUP_DEV_ATTRIBUTE(ering);
758 SETUP_DEV_ATTRIBUTE(id);
759 SETUP_DEV_ATTRIBUTE(gscr);
760 SETUP_DEV_ATTRIBUTE(trim);
761 BUG_ON(count > ATA_DEV_ATTRS);
762 i->dev_attrs[count] = NULL;
763
764 return &i->t;
765}
766
767/**
768 * ata_release_transport -- release ATA transport template instance
769 * @t: transport template instance
770 */
771void ata_release_transport(struct scsi_transport_template *t)
772{
773 struct ata_internal *i = to_ata_internal(t);
774
775 transport_container_unregister(&i->t.host_attrs);
776 transport_container_unregister(&i->link_attr_cont);
777 transport_container_unregister(&i->dev_attr_cont);
778
779 kfree(i);
780}
781
782__init int libata_transport_init(void)
783{
784 int error;
785
786 error = transport_class_register(&ata_link_class);
787 if (error)
788 goto out_unregister_transport;
789 error = transport_class_register(&ata_port_class);
790 if (error)
791 goto out_unregister_link;
792 error = transport_class_register(&ata_dev_class);
793 if (error)
794 goto out_unregister_port;
795 return 0;
796
797 out_unregister_port:
798 transport_class_unregister(&ata_port_class);
799 out_unregister_link:
800 transport_class_unregister(&ata_link_class);
801 out_unregister_transport:
802 return error;
803
804}
805
806void __exit libata_transport_exit(void)
807{
808 transport_class_unregister(&ata_link_class);
809 transport_class_unregister(&ata_port_class);
810 transport_class_unregister(&ata_dev_class);
811}
812