blob: e37413228228ef1b3ec8c8e35186e75fe465d7e1 [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
David Milburne628dc92013-05-14 13:48:40 -050040#define ATA_PORT_ATTRS 3
Gwendal Grignoud9027472010-05-25 12:31:38 -070041#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);
David Milburne628dc92013-05-14 13:48:40 -0500219ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int);
Gwendal Grignoud9027472010-05-25 12:31:38 -0700220
221static DECLARE_TRANSPORT_CLASS(ata_port_class,
222 "ata_port", NULL, NULL, NULL);
223
224static void ata_tport_release(struct device *dev)
225{
226 put_device(dev->parent);
227}
228
229/**
230 * ata_is_port -- check if a struct device represents a ATA port
231 * @dev: device to check
232 *
233 * Returns:
234 * %1 if the device represents a ATA Port, %0 else
235 */
H Hartley Sweetenb0e73af2012-04-16 18:04:41 -0700236static int ata_is_port(const struct device *dev)
Gwendal Grignoud9027472010-05-25 12:31:38 -0700237{
238 return dev->release == ata_tport_release;
239}
240
241static int ata_tport_match(struct attribute_container *cont,
242 struct device *dev)
243{
244 if (!ata_is_port(dev))
245 return 0;
246 return &ata_scsi_transport_template->host_attrs.ac == cont;
247}
248
249/**
250 * ata_tport_delete -- remove ATA PORT
251 * @port: ATA PORT to remove
252 *
253 * Removes the specified ATA PORT. Remove the associated link as well.
254 */
255void ata_tport_delete(struct ata_port *ap)
256{
257 struct device *dev = &ap->tdev;
258
259 ata_tlink_delete(&ap->link);
260
261 transport_remove_device(dev);
262 device_del(dev);
263 transport_destroy_device(dev);
264 put_device(dev);
265}
266
267/** ata_tport_add - initialize a transport ATA port structure
268 *
269 * @parent: parent device
270 * @ap: existing ata_port structure
271 *
272 * Initialize a ATA port structure for sysfs. It will be added to the device
273 * tree below the device specified by @parent which could be a PCI device.
274 *
275 * Returns %0 on success
276 */
277int ata_tport_add(struct device *parent,
278 struct ata_port *ap)
279{
280 int error;
281 struct device *dev = &ap->tdev;
282
283 device_initialize(dev);
Lin Ming5ef41082011-12-05 09:20:27 +0800284 dev->type = &ata_port_type;
Gwendal Grignoud9027472010-05-25 12:31:38 -0700285
286 dev->parent = get_device(parent);
287 dev->release = ata_tport_release;
288 dev_set_name(dev, "ata%d", ap->print_id);
289 transport_setup_device(dev);
Aaron Luf1bc1e42013-08-23 10:17:54 +0800290 ata_acpi_bind_port(ap);
Gwendal Grignoud9027472010-05-25 12:31:38 -0700291 error = device_add(dev);
292 if (error) {
293 goto tport_err;
294 }
295
Lin Ming966f1212012-01-16 13:23:23 +0800296 device_enable_async_suspend(dev);
Lin Ming9ee4f392011-12-05 09:20:28 +0800297 pm_runtime_set_active(dev);
298 pm_runtime_enable(dev);
Lin Ming0c8d32c2012-04-18 09:29:47 +0800299 pm_runtime_forbid(dev);
Lin Ming9ee4f392011-12-05 09:20:28 +0800300
Gwendal Grignoud9027472010-05-25 12:31:38 -0700301 transport_add_device(dev);
302 transport_configure_device(dev);
303
304 error = ata_tlink_add(&ap->link);
305 if (error) {
306 goto tport_link_err;
307 }
308 return 0;
309
310 tport_link_err:
311 transport_remove_device(dev);
312 device_del(dev);
313
314 tport_err:
315 transport_destroy_device(dev);
316 put_device(dev);
317 return error;
318}
319
320
321/*
322 * ATA link attributes
323 */
Gwendal Grignou3e85c3e2013-10-25 16:28:57 -0700324static int noop(int x) { return x; }
Gwendal Grignoud9027472010-05-25 12:31:38 -0700325
Gwendal Grignou3e85c3e2013-10-25 16:28:57 -0700326#define ata_link_show_linkspeed(field, format) \
Gwendal Grignoud9027472010-05-25 12:31:38 -0700327static ssize_t \
328show_ata_link_##field(struct device *dev, \
329 struct device_attribute *attr, char *buf) \
330{ \
331 struct ata_link *link = transport_class_to_link(dev); \
332 \
Gwendal Grignou3e85c3e2013-10-25 16:28:57 -0700333 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \
Gwendal Grignoud9027472010-05-25 12:31:38 -0700334}
335
Gwendal Grignou3e85c3e2013-10-25 16:28:57 -0700336#define ata_link_linkspeed_attr(field, format) \
337 ata_link_show_linkspeed(field, format) \
Gwendal Grignoud9027472010-05-25 12:31:38 -0700338static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
339
Gwendal Grignou3e85c3e2013-10-25 16:28:57 -0700340ata_link_linkspeed_attr(hw_sata_spd_limit, fls);
341ata_link_linkspeed_attr(sata_spd_limit, fls);
342ata_link_linkspeed_attr(sata_spd, noop);
Gwendal Grignoud9027472010-05-25 12:31:38 -0700343
344
345static DECLARE_TRANSPORT_CLASS(ata_link_class,
346 "ata_link", NULL, NULL, NULL);
347
348static void ata_tlink_release(struct device *dev)
349{
350 put_device(dev->parent);
351}
352
353/**
354 * ata_is_link -- check if a struct device represents a ATA link
355 * @dev: device to check
356 *
357 * Returns:
358 * %1 if the device represents a ATA link, %0 else
359 */
H Hartley Sweetenb0e73af2012-04-16 18:04:41 -0700360static int ata_is_link(const struct device *dev)
Gwendal Grignoud9027472010-05-25 12:31:38 -0700361{
362 return dev->release == ata_tlink_release;
363}
364
365static int ata_tlink_match(struct attribute_container *cont,
366 struct device *dev)
367{
368 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
369 if (!ata_is_link(dev))
370 return 0;
371 return &i->link_attr_cont.ac == cont;
372}
373
374/**
375 * ata_tlink_delete -- remove ATA LINK
376 * @port: ATA LINK to remove
377 *
378 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
379 */
380void ata_tlink_delete(struct ata_link *link)
381{
382 struct device *dev = &link->tdev;
383 struct ata_device *ata_dev;
384
385 ata_for_each_dev(ata_dev, link, ALL) {
386 ata_tdev_delete(ata_dev);
387 }
388
389 transport_remove_device(dev);
390 device_del(dev);
391 transport_destroy_device(dev);
392 put_device(dev);
393}
394
395/**
396 * ata_tlink_add -- initialize a transport ATA link structure
397 * @link: allocated ata_link structure.
398 *
399 * Initialize an ATA LINK structure for sysfs. It will be added in the
400 * device tree below the ATA PORT it belongs to.
401 *
402 * Returns %0 on success
403 */
404int ata_tlink_add(struct ata_link *link)
405{
406 struct device *dev = &link->tdev;
407 struct ata_port *ap = link->ap;
408 struct ata_device *ata_dev;
409 int error;
410
411 device_initialize(dev);
412 dev->parent = get_device(&ap->tdev);
413 dev->release = ata_tlink_release;
414 if (ata_is_host_link(link))
415 dev_set_name(dev, "link%d", ap->print_id);
416 else
417 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
418
419 transport_setup_device(dev);
420
421 error = device_add(dev);
422 if (error) {
423 goto tlink_err;
424 }
425
426 transport_add_device(dev);
427 transport_configure_device(dev);
428
429 ata_for_each_dev(ata_dev, link, ALL) {
430 error = ata_tdev_add(ata_dev);
431 if (error) {
432 goto tlink_dev_err;
433 }
434 }
435 return 0;
436 tlink_dev_err:
437 while (--ata_dev >= link->device) {
438 ata_tdev_delete(ata_dev);
439 }
440 transport_remove_device(dev);
441 device_del(dev);
442 tlink_err:
443 transport_destroy_device(dev);
444 put_device(dev);
445 return error;
446}
447
448/*
449 * ATA device attributes
450 */
451
452#define ata_dev_show_class(title, field) \
453static ssize_t \
454show_ata_dev_##field(struct device *dev, \
455 struct device_attribute *attr, char *buf) \
456{ \
457 struct ata_device *ata_dev = transport_class_to_dev(dev); \
458 \
459 return get_ata_##title##_names(ata_dev->field, buf); \
460}
461
462#define ata_dev_attr(title, field) \
463 ata_dev_show_class(title, field) \
464static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
465
466ata_dev_attr(class, class);
467ata_dev_attr(xfer, pio_mode);
468ata_dev_attr(xfer, dma_mode);
469ata_dev_attr(xfer, xfer_mode);
470
471
472#define ata_dev_show_simple(field, format_string, cast) \
473static ssize_t \
474show_ata_dev_##field(struct device *dev, \
475 struct device_attribute *attr, char *buf) \
476{ \
477 struct ata_device *ata_dev = transport_class_to_dev(dev); \
478 \
479 return snprintf(buf, 20, format_string, cast ata_dev->field); \
480}
481
482#define ata_dev_simple_attr(field, format_string, type) \
483 ata_dev_show_simple(field, format_string, (type)) \
484static DEVICE_ATTR(field, S_IRUGO, \
485 show_ata_dev_##field, NULL)
486
487ata_dev_simple_attr(spdn_cnt, "%d\n", int);
488
489struct ata_show_ering_arg {
490 char* buf;
491 int written;
492};
493
494static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
495{
496 struct ata_show_ering_arg* arg = void_arg;
497 struct timespec time;
498
499 jiffies_to_timespec(ent->timestamp,&time);
500 arg->written += sprintf(arg->buf + arg->written,
501 "[%5lu.%06lu]",
502 time.tv_sec, time.tv_nsec);
503 arg->written += get_ata_err_names(ent->err_mask,
504 arg->buf + arg->written);
505 return 0;
506}
507
508static ssize_t
509show_ata_dev_ering(struct device *dev,
510 struct device_attribute *attr, char *buf)
511{
512 struct ata_device *ata_dev = transport_class_to_dev(dev);
513 struct ata_show_ering_arg arg = { buf, 0 };
514
515 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
516 return arg.written;
517}
518
519
520static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
521
522static ssize_t
523show_ata_dev_id(struct device *dev,
524 struct device_attribute *attr, char *buf)
525{
526 struct ata_device *ata_dev = transport_class_to_dev(dev);
527 int written = 0, i = 0;
528
529 if (ata_dev->class == ATA_DEV_PMP)
530 return 0;
531 for(i=0;i<ATA_ID_WORDS;i++) {
532 written += snprintf(buf+written, 20, "%04x%c",
533 ata_dev->id[i],
534 ((i+1) & 7) ? ' ' : '\n');
535 }
536 return written;
537}
538
539static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
540
541static ssize_t
542show_ata_dev_gscr(struct device *dev,
543 struct device_attribute *attr, char *buf)
544{
545 struct ata_device *ata_dev = transport_class_to_dev(dev);
546 int written = 0, i = 0;
547
548 if (ata_dev->class != ATA_DEV_PMP)
549 return 0;
550 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
551 written += snprintf(buf+written, 20, "%08x%c",
552 ata_dev->gscr[i],
553 ((i+1) & 3) ? ' ' : '\n');
554 }
555 if (SATA_PMP_GSCR_DWORDS & 3)
556 buf[written-1] = '\n';
557 return written;
558}
559
560static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
561
562static DECLARE_TRANSPORT_CLASS(ata_dev_class,
563 "ata_device", NULL, NULL, NULL);
564
565static void ata_tdev_release(struct device *dev)
566{
567 put_device(dev->parent);
568}
569
570/**
571 * ata_is_ata_dev -- check if a struct device represents a ATA device
572 * @dev: device to check
573 *
574 * Returns:
575 * %1 if the device represents a ATA device, %0 else
576 */
H Hartley Sweetenb0e73af2012-04-16 18:04:41 -0700577static int ata_is_ata_dev(const struct device *dev)
Gwendal Grignoud9027472010-05-25 12:31:38 -0700578{
579 return dev->release == ata_tdev_release;
580}
581
582static int ata_tdev_match(struct attribute_container *cont,
583 struct device *dev)
584{
585 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
586 if (!ata_is_ata_dev(dev))
587 return 0;
588 return &i->dev_attr_cont.ac == cont;
589}
590
591/**
592 * ata_tdev_free -- free a ATA LINK
593 * @dev: ATA PHY to free
594 *
595 * Frees the specified ATA PHY.
596 *
597 * Note:
598 * This function must only be called on a PHY that has not
599 * successfully been added using ata_tdev_add().
600 */
601static void ata_tdev_free(struct ata_device *dev)
602{
603 transport_destroy_device(&dev->tdev);
604 put_device(&dev->tdev);
605}
606
607/**
608 * ata_tdev_delete -- remove ATA device
609 * @port: ATA PORT to remove
610 *
611 * Removes the specified ATA device.
612 */
613static void ata_tdev_delete(struct ata_device *ata_dev)
614{
615 struct device *dev = &ata_dev->tdev;
616
617 transport_remove_device(dev);
618 device_del(dev);
619 ata_tdev_free(ata_dev);
620}
621
622
623/**
624 * ata_tdev_add -- initialize a transport ATA device structure.
625 * @ata_dev: ata_dev structure.
626 *
627 * Initialize an ATA device structure for sysfs. It will be added in the
628 * device tree below the ATA LINK device it belongs to.
629 *
630 * Returns %0 on success
631 */
632static int ata_tdev_add(struct ata_device *ata_dev)
633{
634 struct device *dev = &ata_dev->tdev;
635 struct ata_link *link = ata_dev->link;
636 struct ata_port *ap = link->ap;
637 int error;
638
639 device_initialize(dev);
640 dev->parent = get_device(&link->tdev);
641 dev->release = ata_tdev_release;
642 if (ata_is_host_link(link))
643 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
644 else
645 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
646
647 transport_setup_device(dev);
Aaron Luf1bc1e42013-08-23 10:17:54 +0800648 ata_acpi_bind_dev(ata_dev);
Gwendal Grignoud9027472010-05-25 12:31:38 -0700649 error = device_add(dev);
650 if (error) {
651 ata_tdev_free(ata_dev);
652 return error;
653 }
654
655 transport_add_device(dev);
656 transport_configure_device(dev);
657 return 0;
658}
659
660
661/*
662 * Setup / Teardown code
663 */
664
665#define SETUP_TEMPLATE(attrb, field, perm, test) \
666 i->private_##attrb[count] = dev_attr_##field; \
667 i->private_##attrb[count].attr.mode = perm; \
668 i->attrb[count] = &i->private_##attrb[count]; \
669 if (test) \
670 count++
671
672#define SETUP_LINK_ATTRIBUTE(field) \
673 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
674
675#define SETUP_PORT_ATTRIBUTE(field) \
676 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
677
678#define SETUP_DEV_ATTRIBUTE(field) \
679 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
680
681/**
682 * ata_attach_transport -- instantiate ATA transport template
683 */
684struct scsi_transport_template *ata_attach_transport(void)
685{
686 struct ata_internal *i;
687 int count;
688
689 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
690 if (!i)
691 return NULL;
692
693 i->t.eh_strategy_handler = ata_scsi_error;
694 i->t.eh_timed_out = ata_scsi_timed_out;
695 i->t.user_scan = ata_scsi_user_scan;
696
697 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
698 i->t.host_attrs.ac.class = &ata_port_class.class;
699 i->t.host_attrs.ac.match = ata_tport_match;
700 transport_container_register(&i->t.host_attrs);
701
702 i->link_attr_cont.ac.class = &ata_link_class.class;
703 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
704 i->link_attr_cont.ac.match = ata_tlink_match;
705 transport_container_register(&i->link_attr_cont);
706
707 i->dev_attr_cont.ac.class = &ata_dev_class.class;
708 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
709 i->dev_attr_cont.ac.match = ata_tdev_match;
710 transport_container_register(&i->dev_attr_cont);
711
712 count = 0;
713 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
714 SETUP_PORT_ATTRIBUTE(idle_irq);
David Milburne628dc92013-05-14 13:48:40 -0500715 SETUP_PORT_ATTRIBUTE(port_no);
Gwendal Grignoud9027472010-05-25 12:31:38 -0700716 BUG_ON(count > ATA_PORT_ATTRS);
717 i->port_attrs[count] = NULL;
718
719 count = 0;
720 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
721 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
722 SETUP_LINK_ATTRIBUTE(sata_spd);
723 BUG_ON(count > ATA_LINK_ATTRS);
724 i->link_attrs[count] = NULL;
725
726 count = 0;
727 SETUP_DEV_ATTRIBUTE(class);
728 SETUP_DEV_ATTRIBUTE(pio_mode);
729 SETUP_DEV_ATTRIBUTE(dma_mode);
730 SETUP_DEV_ATTRIBUTE(xfer_mode);
731 SETUP_DEV_ATTRIBUTE(spdn_cnt);
732 SETUP_DEV_ATTRIBUTE(ering);
733 SETUP_DEV_ATTRIBUTE(id);
734 SETUP_DEV_ATTRIBUTE(gscr);
735 BUG_ON(count > ATA_DEV_ATTRS);
736 i->dev_attrs[count] = NULL;
737
738 return &i->t;
739}
740
741/**
742 * ata_release_transport -- release ATA transport template instance
743 * @t: transport template instance
744 */
745void ata_release_transport(struct scsi_transport_template *t)
746{
747 struct ata_internal *i = to_ata_internal(t);
748
749 transport_container_unregister(&i->t.host_attrs);
750 transport_container_unregister(&i->link_attr_cont);
751 transport_container_unregister(&i->dev_attr_cont);
752
753 kfree(i);
754}
755
756__init int libata_transport_init(void)
757{
758 int error;
759
760 error = transport_class_register(&ata_link_class);
761 if (error)
762 goto out_unregister_transport;
763 error = transport_class_register(&ata_port_class);
764 if (error)
765 goto out_unregister_link;
766 error = transport_class_register(&ata_dev_class);
767 if (error)
768 goto out_unregister_port;
769 return 0;
770
771 out_unregister_port:
772 transport_class_unregister(&ata_port_class);
773 out_unregister_link:
774 transport_class_unregister(&ata_link_class);
775 out_unregister_transport:
776 return error;
777
778}
779
780void __exit libata_transport_exit(void)
781{
782 transport_class_unregister(&ata_link_class);
783 transport_class_unregister(&ata_port_class);
784 transport_class_unregister(&ata_dev_class);
785}