projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[libata] Add ATA transport class
[deliverable/linux.git] / drivers / ata / libata-transport.c
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 <scsi/scsi_transport.h>
31 #include <linux/libata.h>
32 #include <linux/hdreg.h>
33 #include <linux/uaccess.h>
34
35 #include "libata.h"
36 #include "libata-transport.h"
37
38 #define ATA_PORT_ATTRS 2
39 #define ATA_LINK_ATTRS 3
40 #define ATA_DEV_ATTRS 9
41
42 struct scsi_transport_template;
43 struct scsi_transport_template *ata_scsi_transport_template;
44
45 struct ata_internal {
46 struct scsi_transport_template t;
47
48 struct device_attribute private_port_attrs[ATA_PORT_ATTRS];
49 struct device_attribute private_link_attrs[ATA_LINK_ATTRS];
50 struct device_attribute private_dev_attrs[ATA_DEV_ATTRS];
51
52 struct transport_container link_attr_cont;
53 struct transport_container dev_attr_cont;
54
55 /*
56 * The array of null terminated pointers to attributes
57 * needed by scsi_sysfs.c
58 */
59 struct device_attribute *link_attrs[ATA_LINK_ATTRS + 1];
60 struct device_attribute *port_attrs[ATA_PORT_ATTRS + 1];
61 struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1];
62 };
63 #define to_ata_internal(tmpl) container_of(tmpl, struct ata_internal, t)
64
65
66 #define tdev_to_device(d) \
67 container_of((d), struct ata_device, tdev)
68 #define transport_class_to_dev(dev) \
69 tdev_to_device((dev)->parent)
70
71 #define tdev_to_link(d) \
72 container_of((d), struct ata_link, tdev)
73 #define transport_class_to_link(dev) \
74 tdev_to_link((dev)->parent)
75
76 #define tdev_to_port(d) \
77 container_of((d), struct ata_port, tdev)
78 #define transport_class_to_port(dev) \
79 tdev_to_port((dev)->parent)
80
81
82 /* Device objects are always created whit link objects */
83 static int ata_tdev_add(struct ata_device *dev);
84 static void ata_tdev_delete(struct ata_device *dev);
85
86
87 /*
88 * Hack to allow attributes of the same name in different objects.
89 */
90 #define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
91 struct device_attribute device_attr_##_prefix##_##_name = \
92 __ATTR(_name,_mode,_show,_store)
93
94 #define ata_bitfield_name_match(title, table) \
95 static ssize_t \
96 get_ata_##title##_names(u32 table_key, char *buf) \
97 { \
98 char *prefix = ""; \
99 ssize_t len = 0; \
100 int i; \
101 \
102 for (i = 0; i < ARRAY_SIZE(table); i++) { \
103 if (table[i].value & table_key) { \
104 len += sprintf(buf + len, "%s%s", \
105 prefix, table[i].name); \
106 prefix = ", "; \
107 } \
108 } \
109 len += sprintf(buf + len, "\n"); \
110 return len; \
111 }
112
113 #define ata_bitfield_name_search(title, table) \
114 static ssize_t \
115 get_ata_##title##_names(u32 table_key, char *buf) \
116 { \
117 ssize_t len = 0; \
118 int i; \
119 \
120 for (i = 0; i < ARRAY_SIZE(table); i++) { \
121 if (table[i].value == table_key) { \
122 len += sprintf(buf + len, "%s", \
123 table[i].name); \
124 break; \
125 } \
126 } \
127 len += sprintf(buf + len, "\n"); \
128 return len; \
129 }
130
131 static struct {
132 u32 value;
133 char *name;
134 } ata_class_names[] = {
135 { ATA_DEV_UNKNOWN, "unknown" },
136 { ATA_DEV_ATA, "ata" },
137 { ATA_DEV_ATA_UNSUP, "ata" },
138 { ATA_DEV_ATAPI, "atapi" },
139 { ATA_DEV_ATAPI_UNSUP, "atapi" },
140 { ATA_DEV_PMP, "pmp" },
141 { ATA_DEV_PMP_UNSUP, "pmp" },
142 { ATA_DEV_SEMB, "semb" },
143 { ATA_DEV_SEMB_UNSUP, "semb" },
144 { ATA_DEV_NONE, "none" }
145 };
146 ata_bitfield_name_search(class, ata_class_names)
147
148
149 static struct {
150 u32 value;
151 char *name;
152 } ata_err_names[] = {
153 { AC_ERR_DEV, "DeviceError" },
154 { AC_ERR_HSM, "HostStateMachineError" },
155 { AC_ERR_TIMEOUT, "Timeout" },
156 { AC_ERR_MEDIA, "MediaError" },
157 { AC_ERR_ATA_BUS, "BusError" },
158 { AC_ERR_HOST_BUS, "HostBusError" },
159 { AC_ERR_SYSTEM, "SystemError" },
160 { AC_ERR_INVALID, "InvalidArg" },
161 { AC_ERR_OTHER, "Unknown" },
162 { AC_ERR_NODEV_HINT, "NoDeviceHint" },
163 { AC_ERR_NCQ, "NCQError" }
164 };
165 ata_bitfield_name_match(err, ata_err_names)
166
167 static struct {
168 u32 value;
169 char *name;
170 } ata_xfer_names[] = {
171 { XFER_UDMA_7, "XFER_UDMA_7" },
172 { XFER_UDMA_6, "XFER_UDMA_6" },
173 { XFER_UDMA_5, "XFER_UDMA_5" },
174 { XFER_UDMA_4, "XFER_UDMA_4" },
175 { XFER_UDMA_3, "XFER_UDMA_3" },
176 { XFER_UDMA_2, "XFER_UDMA_2" },
177 { XFER_UDMA_1, "XFER_UDMA_1" },
178 { XFER_UDMA_0, "XFER_UDMA_0" },
179 { XFER_MW_DMA_4, "XFER_MW_DMA_4" },
180 { XFER_MW_DMA_3, "XFER_MW_DMA_3" },
181 { XFER_MW_DMA_2, "XFER_MW_DMA_2" },
182 { XFER_MW_DMA_1, "XFER_MW_DMA_1" },
183 { XFER_MW_DMA_0, "XFER_MW_DMA_0" },
184 { XFER_SW_DMA_2, "XFER_SW_DMA_2" },
185 { XFER_SW_DMA_1, "XFER_SW_DMA_1" },
186 { XFER_SW_DMA_0, "XFER_SW_DMA_0" },
187 { XFER_PIO_6, "XFER_PIO_6" },
188 { XFER_PIO_5, "XFER_PIO_5" },
189 { XFER_PIO_4, "XFER_PIO_4" },
190 { XFER_PIO_3, "XFER_PIO_3" },
191 { XFER_PIO_2, "XFER_PIO_2" },
192 { XFER_PIO_1, "XFER_PIO_1" },
193 { XFER_PIO_0, "XFER_PIO_0" },
194 { XFER_PIO_SLOW, "XFER_PIO_SLOW" }
195 };
196 ata_bitfield_name_match(xfer,ata_xfer_names)
197
198 /*
199 * ATA Port attributes
200 */
201 #define ata_port_show_simple(field, name, format_string, cast) \
202 static ssize_t \
203 show_ata_port_##name(struct device *dev, \
204 struct device_attribute *attr, char *buf) \
205 { \
206 struct ata_port *ap = transport_class_to_port(dev); \
207 \
208 return snprintf(buf, 20, format_string, cast ap->field); \
209 }
210
211 #define ata_port_simple_attr(field, name, format_string, type) \
212 ata_port_show_simple(field, name, format_string, (type)) \
213 static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
214
215 ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
216 ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
217
218 static DECLARE_TRANSPORT_CLASS(ata_port_class,
219 "ata_port", NULL, NULL, NULL);
220
221 static void ata_tport_release(struct device *dev)
222 {
223 put_device(dev->parent);
224 }
225
226 /**
227 * ata_is_port -- check if a struct device represents a ATA port
228 * @dev: device to check
229 *
230 * Returns:
231 * %1 if the device represents a ATA Port, %0 else
232 */
233 int ata_is_port(const struct device *dev)
234 {
235 return dev->release == ata_tport_release;
236 }
237
238 static int ata_tport_match(struct attribute_container *cont,
239 struct device *dev)
240 {
241 if (!ata_is_port(dev))
242 return 0;
243 return &ata_scsi_transport_template->host_attrs.ac == cont;
244 }
245
246 /**
247 * ata_tport_delete -- remove ATA PORT
248 * @port: ATA PORT to remove
249 *
250 * Removes the specified ATA PORT. Remove the associated link as well.
251 */
252 void ata_tport_delete(struct ata_port *ap)
253 {
254 struct device *dev = &ap->tdev;
255
256 ata_tlink_delete(&ap->link);
257
258 transport_remove_device(dev);
259 device_del(dev);
260 transport_destroy_device(dev);
261 put_device(dev);
262 }
263
264 /** ata_tport_add - initialize a transport ATA port structure
265 *
266 * @parent: parent device
267 * @ap: existing ata_port structure
268 *
269 * Initialize a ATA port structure for sysfs. It will be added to the device
270 * tree below the device specified by @parent which could be a PCI device.
271 *
272 * Returns %0 on success
273 */
274 int ata_tport_add(struct device *parent,
275 struct ata_port *ap)
276 {
277 int error;
278 struct device *dev = &ap->tdev;
279
280 device_initialize(dev);
281
282 dev->parent = get_device(parent);
283 dev->release = ata_tport_release;
284 dev_set_name(dev, "ata%d", ap->print_id);
285 transport_setup_device(dev);
286 error = device_add(dev);
287 if (error) {
288 goto tport_err;
289 }
290
291 transport_add_device(dev);
292 transport_configure_device(dev);
293
294 error = ata_tlink_add(&ap->link);
295 if (error) {
296 goto tport_link_err;
297 }
298 return 0;
299
300 tport_link_err:
301 transport_remove_device(dev);
302 device_del(dev);
303
304 tport_err:
305 transport_destroy_device(dev);
306 put_device(dev);
307 return error;
308 }
309
310
311 /*
312 * ATA link attributes
313 */
314
315
316 #define ata_link_show_linkspeed(field) \
317 static ssize_t \
318 show_ata_link_##field(struct device *dev, \
319 struct device_attribute *attr, char *buf) \
320 { \
321 struct ata_link *link = transport_class_to_link(dev); \
322 \
323 return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \
324 }
325
326 #define ata_link_linkspeed_attr(field) \
327 ata_link_show_linkspeed(field) \
328 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
329
330 ata_link_linkspeed_attr(hw_sata_spd_limit);
331 ata_link_linkspeed_attr(sata_spd_limit);
332 ata_link_linkspeed_attr(sata_spd);
333
334
335 static DECLARE_TRANSPORT_CLASS(ata_link_class,
336 "ata_link", NULL, NULL, NULL);
337
338 static void ata_tlink_release(struct device *dev)
339 {
340 put_device(dev->parent);
341 }
342
343 /**
344 * ata_is_link -- check if a struct device represents a ATA link
345 * @dev: device to check
346 *
347 * Returns:
348 * %1 if the device represents a ATA link, %0 else
349 */
350 int ata_is_link(const struct device *dev)
351 {
352 return dev->release == ata_tlink_release;
353 }
354
355 static int ata_tlink_match(struct attribute_container *cont,
356 struct device *dev)
357 {
358 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
359 if (!ata_is_link(dev))
360 return 0;
361 return &i->link_attr_cont.ac == cont;
362 }
363
364 /**
365 * ata_tlink_delete -- remove ATA LINK
366 * @port: ATA LINK to remove
367 *
368 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
369 */
370 void ata_tlink_delete(struct ata_link *link)
371 {
372 struct device *dev = &link->tdev;
373 struct ata_device *ata_dev;
374
375 ata_for_each_dev(ata_dev, link, ALL) {
376 ata_tdev_delete(ata_dev);
377 }
378
379 transport_remove_device(dev);
380 device_del(dev);
381 transport_destroy_device(dev);
382 put_device(dev);
383 }
384
385 /**
386 * ata_tlink_add -- initialize a transport ATA link structure
387 * @link: allocated ata_link structure.
388 *
389 * Initialize an ATA LINK structure for sysfs. It will be added in the
390 * device tree below the ATA PORT it belongs to.
391 *
392 * Returns %0 on success
393 */
394 int ata_tlink_add(struct ata_link *link)
395 {
396 struct device *dev = &link->tdev;
397 struct ata_port *ap = link->ap;
398 struct ata_device *ata_dev;
399 int error;
400
401 device_initialize(dev);
402 dev->parent = get_device(&ap->tdev);
403 dev->release = ata_tlink_release;
404 if (ata_is_host_link(link))
405 dev_set_name(dev, "link%d", ap->print_id);
406 else
407 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
408
409 transport_setup_device(dev);
410
411 error = device_add(dev);
412 if (error) {
413 goto tlink_err;
414 }
415
416 transport_add_device(dev);
417 transport_configure_device(dev);
418
419 ata_for_each_dev(ata_dev, link, ALL) {
420 error = ata_tdev_add(ata_dev);
421 if (error) {
422 goto tlink_dev_err;
423 }
424 }
425 return 0;
426 tlink_dev_err:
427 while (--ata_dev >= link->device) {
428 ata_tdev_delete(ata_dev);
429 }
430 transport_remove_device(dev);
431 device_del(dev);
432 tlink_err:
433 transport_destroy_device(dev);
434 put_device(dev);
435 return error;
436 }
437
438 /*
439 * ATA device attributes
440 */
441
442 #define ata_dev_show_class(title, field) \
443 static ssize_t \
444 show_ata_dev_##field(struct device *dev, \
445 struct device_attribute *attr, char *buf) \
446 { \
447 struct ata_device *ata_dev = transport_class_to_dev(dev); \
448 \
449 return get_ata_##title##_names(ata_dev->field, buf); \
450 }
451
452 #define ata_dev_attr(title, field) \
453 ata_dev_show_class(title, field) \
454 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
455
456 ata_dev_attr(class, class);
457 ata_dev_attr(xfer, pio_mode);
458 ata_dev_attr(xfer, dma_mode);
459 ata_dev_attr(xfer, xfer_mode);
460
461
462 #define ata_dev_show_simple(field, format_string, cast) \
463 static ssize_t \
464 show_ata_dev_##field(struct device *dev, \
465 struct device_attribute *attr, char *buf) \
466 { \
467 struct ata_device *ata_dev = transport_class_to_dev(dev); \
468 \
469 return snprintf(buf, 20, format_string, cast ata_dev->field); \
470 }
471
472 #define ata_dev_simple_attr(field, format_string, type) \
473 ata_dev_show_simple(field, format_string, (type)) \
474 static DEVICE_ATTR(field, S_IRUGO, \
475 show_ata_dev_##field, NULL)
476
477 ata_dev_simple_attr(spdn_cnt, "%d\n", int);
478
479 struct ata_show_ering_arg {
480 char* buf;
481 int written;
482 };
483
484 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
485 {
486 struct ata_show_ering_arg* arg = void_arg;
487 struct timespec time;
488
489 jiffies_to_timespec(ent->timestamp,&time);
490 arg->written += sprintf(arg->buf + arg->written,
491 "[%5lu.%06lu]",
492 time.tv_sec, time.tv_nsec);
493 arg->written += get_ata_err_names(ent->err_mask,
494 arg->buf + arg->written);
495 return 0;
496 }
497
498 static ssize_t
499 show_ata_dev_ering(struct device *dev,
500 struct device_attribute *attr, char *buf)
501 {
502 struct ata_device *ata_dev = transport_class_to_dev(dev);
503 struct ata_show_ering_arg arg = { buf, 0 };
504
505 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
506 return arg.written;
507 }
508
509
510 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
511
512 static ssize_t
513 show_ata_dev_id(struct device *dev,
514 struct device_attribute *attr, char *buf)
515 {
516 struct ata_device *ata_dev = transport_class_to_dev(dev);
517 int written = 0, i = 0;
518
519 if (ata_dev->class == ATA_DEV_PMP)
520 return 0;
521 for(i=0;i<ATA_ID_WORDS;i++) {
522 written += snprintf(buf+written, 20, "%04x%c",
523 ata_dev->id[i],
524 ((i+1) & 7) ? ' ' : '\n');
525 }
526 return written;
527 }
528
529 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
530
531 static ssize_t
532 show_ata_dev_gscr(struct device *dev,
533 struct device_attribute *attr, char *buf)
534 {
535 struct ata_device *ata_dev = transport_class_to_dev(dev);
536 int written = 0, i = 0;
537
538 if (ata_dev->class != ATA_DEV_PMP)
539 return 0;
540 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
541 written += snprintf(buf+written, 20, "%08x%c",
542 ata_dev->gscr[i],
543 ((i+1) & 3) ? ' ' : '\n');
544 }
545 if (SATA_PMP_GSCR_DWORDS & 3)
546 buf[written-1] = '\n';
547 return written;
548 }
549
550 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
551
552 static DECLARE_TRANSPORT_CLASS(ata_dev_class,
553 "ata_device", NULL, NULL, NULL);
554
555 static void ata_tdev_release(struct device *dev)
556 {
557 put_device(dev->parent);
558 }
559
560 /**
561 * ata_is_ata_dev -- check if a struct device represents a ATA device
562 * @dev: device to check
563 *
564 * Returns:
565 * %1 if the device represents a ATA device, %0 else
566 */
567 int ata_is_ata_dev(const struct device *dev)
568 {
569 return dev->release == ata_tdev_release;
570 }
571
572 static int ata_tdev_match(struct attribute_container *cont,
573 struct device *dev)
574 {
575 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
576 if (!ata_is_ata_dev(dev))
577 return 0;
578 return &i->dev_attr_cont.ac == cont;
579 }
580
581 /**
582 * ata_tdev_free -- free a ATA LINK
583 * @dev: ATA PHY to free
584 *
585 * Frees the specified ATA PHY.
586 *
587 * Note:
588 * This function must only be called on a PHY that has not
589 * successfully been added using ata_tdev_add().
590 */
591 static void ata_tdev_free(struct ata_device *dev)
592 {
593 transport_destroy_device(&dev->tdev);
594 put_device(&dev->tdev);
595 }
596
597 /**
598 * ata_tdev_delete -- remove ATA device
599 * @port: ATA PORT to remove
600 *
601 * Removes the specified ATA device.
602 */
603 static void ata_tdev_delete(struct ata_device *ata_dev)
604 {
605 struct device *dev = &ata_dev->tdev;
606
607 transport_remove_device(dev);
608 device_del(dev);
609 ata_tdev_free(ata_dev);
610 }
611
612
613 /**
614 * ata_tdev_add -- initialize a transport ATA device structure.
615 * @ata_dev: ata_dev structure.
616 *
617 * Initialize an ATA device structure for sysfs. It will be added in the
618 * device tree below the ATA LINK device it belongs to.
619 *
620 * Returns %0 on success
621 */
622 static int ata_tdev_add(struct ata_device *ata_dev)
623 {
624 struct device *dev = &ata_dev->tdev;
625 struct ata_link *link = ata_dev->link;
626 struct ata_port *ap = link->ap;
627 int error;
628
629 device_initialize(dev);
630 dev->parent = get_device(&link->tdev);
631 dev->release = ata_tdev_release;
632 if (ata_is_host_link(link))
633 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
634 else
635 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
636
637 transport_setup_device(dev);
638 error = device_add(dev);
639 if (error) {
640 ata_tdev_free(ata_dev);
641 return error;
642 }
643
644 transport_add_device(dev);
645 transport_configure_device(dev);
646 return 0;
647 }
648
649
650 /*
651 * Setup / Teardown code
652 */
653
654 #define SETUP_TEMPLATE(attrb, field, perm, test) \
655 i->private_##attrb[count] = dev_attr_##field; \
656 i->private_##attrb[count].attr.mode = perm; \
657 i->attrb[count] = &i->private_##attrb[count]; \
658 if (test) \
659 count++
660
661 #define SETUP_LINK_ATTRIBUTE(field) \
662 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
663
664 #define SETUP_PORT_ATTRIBUTE(field) \
665 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
666
667 #define SETUP_DEV_ATTRIBUTE(field) \
668 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
669
670 /**
671 * ata_attach_transport -- instantiate ATA transport template
672 */
673 struct scsi_transport_template *ata_attach_transport(void)
674 {
675 struct ata_internal *i;
676 int count;
677
678 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
679 if (!i)
680 return NULL;
681
682 i->t.eh_strategy_handler = ata_scsi_error;
683 i->t.eh_timed_out = ata_scsi_timed_out;
684 i->t.user_scan = ata_scsi_user_scan;
685
686 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
687 i->t.host_attrs.ac.class = &ata_port_class.class;
688 i->t.host_attrs.ac.match = ata_tport_match;
689 transport_container_register(&i->t.host_attrs);
690
691 i->link_attr_cont.ac.class = &ata_link_class.class;
692 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
693 i->link_attr_cont.ac.match = ata_tlink_match;
694 transport_container_register(&i->link_attr_cont);
695
696 i->dev_attr_cont.ac.class = &ata_dev_class.class;
697 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
698 i->dev_attr_cont.ac.match = ata_tdev_match;
699 transport_container_register(&i->dev_attr_cont);
700
701 count = 0;
702 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
703 SETUP_PORT_ATTRIBUTE(idle_irq);
704 BUG_ON(count > ATA_PORT_ATTRS);
705 i->port_attrs[count] = NULL;
706
707 count = 0;
708 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
709 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
710 SETUP_LINK_ATTRIBUTE(sata_spd);
711 BUG_ON(count > ATA_LINK_ATTRS);
712 i->link_attrs[count] = NULL;
713
714 count = 0;
715 SETUP_DEV_ATTRIBUTE(class);
716 SETUP_DEV_ATTRIBUTE(pio_mode);
717 SETUP_DEV_ATTRIBUTE(dma_mode);
718 SETUP_DEV_ATTRIBUTE(xfer_mode);
719 SETUP_DEV_ATTRIBUTE(spdn_cnt);
720 SETUP_DEV_ATTRIBUTE(ering);
721 SETUP_DEV_ATTRIBUTE(id);
722 SETUP_DEV_ATTRIBUTE(gscr);
723 BUG_ON(count > ATA_DEV_ATTRS);
724 i->dev_attrs[count] = NULL;
725
726 return &i->t;
727 }
728
729 /**
730 * ata_release_transport -- release ATA transport template instance
731 * @t: transport template instance
732 */
733 void ata_release_transport(struct scsi_transport_template *t)
734 {
735 struct ata_internal *i = to_ata_internal(t);
736
737 transport_container_unregister(&i->t.host_attrs);
738 transport_container_unregister(&i->link_attr_cont);
739 transport_container_unregister(&i->dev_attr_cont);
740
741 kfree(i);
742 }
743
744 __init int libata_transport_init(void)
745 {
746 int error;
747
748 error = transport_class_register(&ata_link_class);
749 if (error)
750 goto out_unregister_transport;
751 error = transport_class_register(&ata_port_class);
752 if (error)
753 goto out_unregister_link;
754 error = transport_class_register(&ata_dev_class);
755 if (error)
756 goto out_unregister_port;
757 return 0;
758
759 out_unregister_port:
760 transport_class_unregister(&ata_port_class);
761 out_unregister_link:
762 transport_class_unregister(&ata_link_class);
763 out_unregister_transport:
764 return error;
765
766 }
767
768 void __exit libata_transport_exit(void)
769 {
770 transport_class_unregister(&ata_link_class);
771 transport_class_unregister(&ata_port_class);
772 transport_class_unregister(&ata_dev_class);
773 }
Linux kernel - Deliverables
This page took 0.05155 seconds and 5 git commands to generate.