1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2008 ioogle, Inc. All rights reserved.
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
44 struct scsi_transport_template;
45 struct scsi_transport_template *ata_scsi_transport_template;
46
47 struct 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 */
85 static int ata_tdev_add(struct ata_device *dev);
86 static 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) \
97 static ssize_t \
98 get_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) \
116 static ssize_t \
117 get_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
133 static 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 };
149 ata_bitfield_name_search(class, ata_class_names)
150
151
152 static 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 };
168 ata_bitfield_name_match(err, ata_err_names)
169
170 static 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 };
199 ata_bitfield_name_search(xfer, ata_xfer_names)
200
201 /*
202 * ATA Port attributes
203 */
204 #define ata_port_show_simple(field, name, format_string, cast) \
205 static ssize_t \
206 show_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)) \
216 static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
217
218 ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
219 ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
220 ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int);
221
222 static DECLARE_TRANSPORT_CLASS(ata_port_class,
223 "ata_port", NULL, NULL, NULL);
224
ata_tport_release(struct device * dev)225 static 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 */
ata_is_port(const struct device * dev)238 static int ata_is_port(const struct device *dev)
239 {
240 return dev->release == ata_tport_release;
241 }
242
ata_tport_match(struct attribute_container * cont,struct device * dev)243 static 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 */
ata_tport_delete(struct ata_port * ap)257 void 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 static const struct device_type ata_port_sas_type = {
270 .name = ATA_PORT_TYPE_NAME,
271 };
272
273 /** ata_tport_add - initialize a transport ATA port structure
274 *
275 * @parent: parent device
276 * @ap: existing ata_port structure
277 *
278 * Initialize a ATA port structure for sysfs. It will be added to the device
279 * tree below the device specified by @parent which could be a PCI device.
280 *
281 * Returns %0 on success
282 */
ata_tport_add(struct device * parent,struct ata_port * ap)283 int ata_tport_add(struct device *parent,
284 struct ata_port *ap)
285 {
286 int error;
287 struct device *dev = &ap->tdev;
288
289 device_initialize(dev);
290 if (ap->flags & ATA_FLAG_SAS_HOST)
291 dev->type = &ata_port_sas_type;
292 else
293 dev->type = &ata_port_type;
294
295 dev->parent = parent;
296 ata_host_get(ap->host);
297 dev->release = ata_tport_release;
298 dev_set_name(dev, "ata%d", ap->print_id);
299 transport_setup_device(dev);
300 ata_acpi_bind_port(ap);
301 error = device_add(dev);
302 if (error) {
303 goto tport_err;
304 }
305
306 device_enable_async_suspend(dev);
307 pm_runtime_set_active(dev);
308 pm_runtime_enable(dev);
309 pm_runtime_forbid(dev);
310
311 transport_add_device(dev);
312 transport_configure_device(dev);
313
314 error = ata_tlink_add(&ap->link);
315 if (error) {
316 goto tport_link_err;
317 }
318 return 0;
319
320 tport_link_err:
321 transport_remove_device(dev);
322 device_del(dev);
323
324 tport_err:
325 transport_destroy_device(dev);
326 put_device(dev);
327 return error;
328 }
329
330
331 /*
332 * ATA link attributes
333 */
noop(int x)334 static int noop(int x) { return x; }
335
336 #define ata_link_show_linkspeed(field, format) \
337 static ssize_t \
338 show_ata_link_##field(struct device *dev, \
339 struct device_attribute *attr, char *buf) \
340 { \
341 struct ata_link *link = transport_class_to_link(dev); \
342 \
343 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \
344 }
345
346 #define ata_link_linkspeed_attr(field, format) \
347 ata_link_show_linkspeed(field, format) \
348 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
349
350 ata_link_linkspeed_attr(hw_sata_spd_limit, fls);
351 ata_link_linkspeed_attr(sata_spd_limit, fls);
352 ata_link_linkspeed_attr(sata_spd, noop);
353
354
355 static DECLARE_TRANSPORT_CLASS(ata_link_class,
356 "ata_link", NULL, NULL, NULL);
357
ata_tlink_release(struct device * dev)358 static void ata_tlink_release(struct device *dev)
359 {
360 }
361
362 /**
363 * ata_is_link -- check if a struct device represents a ATA link
364 * @dev: device to check
365 *
366 * Returns:
367 * %1 if the device represents a ATA link, %0 else
368 */
ata_is_link(const struct device * dev)369 static int ata_is_link(const struct device *dev)
370 {
371 return dev->release == ata_tlink_release;
372 }
373
ata_tlink_match(struct attribute_container * cont,struct device * dev)374 static int ata_tlink_match(struct attribute_container *cont,
375 struct device *dev)
376 {
377 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
378 if (!ata_is_link(dev))
379 return 0;
380 return &i->link_attr_cont.ac == cont;
381 }
382
383 /**
384 * ata_tlink_delete -- remove ATA LINK
385 * @port: ATA LINK to remove
386 *
387 * Removes the specified ATA LINK. remove associated ATA device(s) as well.
388 */
ata_tlink_delete(struct ata_link * link)389 void ata_tlink_delete(struct ata_link *link)
390 {
391 struct device *dev = &link->tdev;
392 struct ata_device *ata_dev;
393
394 ata_for_each_dev(ata_dev, link, ALL) {
395 ata_tdev_delete(ata_dev);
396 }
397
398 transport_remove_device(dev);
399 device_del(dev);
400 transport_destroy_device(dev);
401 put_device(dev);
402 }
403
404 /**
405 * ata_tlink_add -- initialize a transport ATA link structure
406 * @link: allocated ata_link structure.
407 *
408 * Initialize an ATA LINK structure for sysfs. It will be added in the
409 * device tree below the ATA PORT it belongs to.
410 *
411 * Returns %0 on success
412 */
ata_tlink_add(struct ata_link * link)413 int ata_tlink_add(struct ata_link *link)
414 {
415 struct device *dev = &link->tdev;
416 struct ata_port *ap = link->ap;
417 struct ata_device *ata_dev;
418 int error;
419
420 device_initialize(dev);
421 dev->parent = &ap->tdev;
422 dev->release = ata_tlink_release;
423 if (ata_is_host_link(link))
424 dev_set_name(dev, "link%d", ap->print_id);
425 else
426 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
427
428 transport_setup_device(dev);
429
430 error = device_add(dev);
431 if (error) {
432 goto tlink_err;
433 }
434
435 transport_add_device(dev);
436 transport_configure_device(dev);
437
438 ata_for_each_dev(ata_dev, link, ALL) {
439 error = ata_tdev_add(ata_dev);
440 if (error) {
441 goto tlink_dev_err;
442 }
443 }
444 return 0;
445 tlink_dev_err:
446 while (--ata_dev >= link->device) {
447 ata_tdev_delete(ata_dev);
448 }
449 transport_remove_device(dev);
450 device_del(dev);
451 tlink_err:
452 transport_destroy_device(dev);
453 put_device(dev);
454 return error;
455 }
456
457 /*
458 * ATA device attributes
459 */
460
461 #define ata_dev_show_class(title, field) \
462 static ssize_t \
463 show_ata_dev_##field(struct device *dev, \
464 struct device_attribute *attr, char *buf) \
465 { \
466 struct ata_device *ata_dev = transport_class_to_dev(dev); \
467 \
468 return get_ata_##title##_names(ata_dev->field, buf); \
469 }
470
471 #define ata_dev_attr(title, field) \
472 ata_dev_show_class(title, field) \
473 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
474
475 ata_dev_attr(class, class);
476 ata_dev_attr(xfer, pio_mode);
477 ata_dev_attr(xfer, dma_mode);
478 ata_dev_attr(xfer, xfer_mode);
479
480
481 #define ata_dev_show_simple(field, format_string, cast) \
482 static ssize_t \
483 show_ata_dev_##field(struct device *dev, \
484 struct device_attribute *attr, char *buf) \
485 { \
486 struct ata_device *ata_dev = transport_class_to_dev(dev); \
487 \
488 return snprintf(buf, 20, format_string, cast ata_dev->field); \
489 }
490
491 #define ata_dev_simple_attr(field, format_string, type) \
492 ata_dev_show_simple(field, format_string, (type)) \
493 static DEVICE_ATTR(field, S_IRUGO, \
494 show_ata_dev_##field, NULL)
495
496 ata_dev_simple_attr(spdn_cnt, "%d\n", int);
497
498 struct ata_show_ering_arg {
499 char* buf;
500 int written;
501 };
502
ata_show_ering(struct ata_ering_entry * ent,void * void_arg)503 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
504 {
505 struct ata_show_ering_arg* arg = void_arg;
506 u64 seconds;
507 u32 rem;
508
509 seconds = div_u64_rem(ent->timestamp, HZ, &rem);
510 arg->written += sprintf(arg->buf + arg->written,
511 "[%5llu.%09lu]", seconds,
512 rem * NSEC_PER_SEC / HZ);
513 arg->written += get_ata_err_names(ent->err_mask,
514 arg->buf + arg->written);
515 return 0;
516 }
517
518 static ssize_t
show_ata_dev_ering(struct device * dev,struct device_attribute * attr,char * buf)519 show_ata_dev_ering(struct device *dev,
520 struct device_attribute *attr, char *buf)
521 {
522 struct ata_device *ata_dev = transport_class_to_dev(dev);
523 struct ata_show_ering_arg arg = { buf, 0 };
524
525 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
526 return arg.written;
527 }
528
529
530 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
531
532 static ssize_t
show_ata_dev_id(struct device * dev,struct device_attribute * attr,char * buf)533 show_ata_dev_id(struct device *dev,
534 struct device_attribute *attr, char *buf)
535 {
536 struct ata_device *ata_dev = transport_class_to_dev(dev);
537 int written = 0, i = 0;
538
539 if (ata_dev->class == ATA_DEV_PMP)
540 return 0;
541 for(i=0;i<ATA_ID_WORDS;i++) {
542 written += snprintf(buf+written, 20, "%04x%c",
543 ata_dev->id[i],
544 ((i+1) & 7) ? ' ' : '\n');
545 }
546 return written;
547 }
548
549 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
550
551 static ssize_t
show_ata_dev_gscr(struct device * dev,struct device_attribute * attr,char * buf)552 show_ata_dev_gscr(struct device *dev,
553 struct device_attribute *attr, char *buf)
554 {
555 struct ata_device *ata_dev = transport_class_to_dev(dev);
556 int written = 0, i = 0;
557
558 if (ata_dev->class != ATA_DEV_PMP)
559 return 0;
560 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
561 written += snprintf(buf+written, 20, "%08x%c",
562 ata_dev->gscr[i],
563 ((i+1) & 3) ? ' ' : '\n');
564 }
565 if (SATA_PMP_GSCR_DWORDS & 3)
566 buf[written-1] = '\n';
567 return written;
568 }
569
570 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
571
572 static ssize_t
show_ata_dev_trim(struct device * dev,struct device_attribute * attr,char * buf)573 show_ata_dev_trim(struct device *dev,
574 struct device_attribute *attr, char *buf)
575 {
576 struct ata_device *ata_dev = transport_class_to_dev(dev);
577 unsigned char *mode;
578
579 if (!ata_id_has_trim(ata_dev->id))
580 mode = "unsupported";
581 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM)
582 mode = "forced_unsupported";
583 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM)
584 mode = "forced_unqueued";
585 else if (ata_fpdma_dsm_supported(ata_dev))
586 mode = "queued";
587 else
588 mode = "unqueued";
589
590 return snprintf(buf, 20, "%s\n", mode);
591 }
592
593 static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL);
594
595 static DECLARE_TRANSPORT_CLASS(ata_dev_class,
596 "ata_device", NULL, NULL, NULL);
597
ata_tdev_release(struct device * dev)598 static void ata_tdev_release(struct device *dev)
599 {
600 }
601
602 /**
603 * ata_is_ata_dev -- check if a struct device represents a ATA device
604 * @dev: device to check
605 *
606 * Returns:
607 * %1 if the device represents a ATA device, %0 else
608 */
ata_is_ata_dev(const struct device * dev)609 static int ata_is_ata_dev(const struct device *dev)
610 {
611 return dev->release == ata_tdev_release;
612 }
613
ata_tdev_match(struct attribute_container * cont,struct device * dev)614 static int ata_tdev_match(struct attribute_container *cont,
615 struct device *dev)
616 {
617 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
618 if (!ata_is_ata_dev(dev))
619 return 0;
620 return &i->dev_attr_cont.ac == cont;
621 }
622
623 /**
624 * ata_tdev_free -- free a ATA LINK
625 * @dev: ATA PHY to free
626 *
627 * Frees the specified ATA PHY.
628 *
629 * Note:
630 * This function must only be called on a PHY that has not
631 * successfully been added using ata_tdev_add().
632 */
ata_tdev_free(struct ata_device * dev)633 static void ata_tdev_free(struct ata_device *dev)
634 {
635 transport_destroy_device(&dev->tdev);
636 put_device(&dev->tdev);
637 }
638
639 /**
640 * ata_tdev_delete -- remove ATA device
641 * @port: ATA PORT to remove
642 *
643 * Removes the specified ATA device.
644 */
ata_tdev_delete(struct ata_device * ata_dev)645 static void ata_tdev_delete(struct ata_device *ata_dev)
646 {
647 struct device *dev = &ata_dev->tdev;
648
649 transport_remove_device(dev);
650 device_del(dev);
651 ata_tdev_free(ata_dev);
652 }
653
654
655 /**
656 * ata_tdev_add -- initialize a transport ATA device structure.
657 * @ata_dev: ata_dev structure.
658 *
659 * Initialize an ATA device structure for sysfs. It will be added in the
660 * device tree below the ATA LINK device it belongs to.
661 *
662 * Returns %0 on success
663 */
ata_tdev_add(struct ata_device * ata_dev)664 static int ata_tdev_add(struct ata_device *ata_dev)
665 {
666 struct device *dev = &ata_dev->tdev;
667 struct ata_link *link = ata_dev->link;
668 struct ata_port *ap = link->ap;
669 int error;
670
671 device_initialize(dev);
672 dev->parent = &link->tdev;
673 dev->release = ata_tdev_release;
674 if (ata_is_host_link(link))
675 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
676 else
677 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
678
679 transport_setup_device(dev);
680 ata_acpi_bind_dev(ata_dev);
681 error = device_add(dev);
682 if (error) {
683 ata_tdev_free(ata_dev);
684 return error;
685 }
686
687 transport_add_device(dev);
688 transport_configure_device(dev);
689 return 0;
690 }
691
692
693 /*
694 * Setup / Teardown code
695 */
696
697 #define SETUP_TEMPLATE(attrb, field, perm, test) \
698 i->private_##attrb[count] = dev_attr_##field; \
699 i->private_##attrb[count].attr.mode = perm; \
700 i->attrb[count] = &i->private_##attrb[count]; \
701 if (test) \
702 count++
703
704 #define SETUP_LINK_ATTRIBUTE(field) \
705 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
706
707 #define SETUP_PORT_ATTRIBUTE(field) \
708 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
709
710 #define SETUP_DEV_ATTRIBUTE(field) \
711 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
712
713 /**
714 * ata_attach_transport -- instantiate ATA transport template
715 */
ata_attach_transport(void)716 struct scsi_transport_template *ata_attach_transport(void)
717 {
718 struct ata_internal *i;
719 int count;
720
721 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
722 if (!i)
723 return NULL;
724
725 i->t.eh_strategy_handler = ata_scsi_error;
726 i->t.user_scan = ata_scsi_user_scan;
727
728 i->t.host_attrs.ac.attrs = &i->port_attrs[0];
729 i->t.host_attrs.ac.class = &ata_port_class.class;
730 i->t.host_attrs.ac.match = ata_tport_match;
731 transport_container_register(&i->t.host_attrs);
732
733 i->link_attr_cont.ac.class = &ata_link_class.class;
734 i->link_attr_cont.ac.attrs = &i->link_attrs[0];
735 i->link_attr_cont.ac.match = ata_tlink_match;
736 transport_container_register(&i->link_attr_cont);
737
738 i->dev_attr_cont.ac.class = &ata_dev_class.class;
739 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
740 i->dev_attr_cont.ac.match = ata_tdev_match;
741 transport_container_register(&i->dev_attr_cont);
742
743 count = 0;
744 SETUP_PORT_ATTRIBUTE(nr_pmp_links);
745 SETUP_PORT_ATTRIBUTE(idle_irq);
746 SETUP_PORT_ATTRIBUTE(port_no);
747 BUG_ON(count > ATA_PORT_ATTRS);
748 i->port_attrs[count] = NULL;
749
750 count = 0;
751 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
752 SETUP_LINK_ATTRIBUTE(sata_spd_limit);
753 SETUP_LINK_ATTRIBUTE(sata_spd);
754 BUG_ON(count > ATA_LINK_ATTRS);
755 i->link_attrs[count] = NULL;
756
757 count = 0;
758 SETUP_DEV_ATTRIBUTE(class);
759 SETUP_DEV_ATTRIBUTE(pio_mode);
760 SETUP_DEV_ATTRIBUTE(dma_mode);
761 SETUP_DEV_ATTRIBUTE(xfer_mode);
762 SETUP_DEV_ATTRIBUTE(spdn_cnt);
763 SETUP_DEV_ATTRIBUTE(ering);
764 SETUP_DEV_ATTRIBUTE(id);
765 SETUP_DEV_ATTRIBUTE(gscr);
766 SETUP_DEV_ATTRIBUTE(trim);
767 BUG_ON(count > ATA_DEV_ATTRS);
768 i->dev_attrs[count] = NULL;
769
770 return &i->t;
771 }
772
773 /**
774 * ata_release_transport -- release ATA transport template instance
775 * @t: transport template instance
776 */
ata_release_transport(struct scsi_transport_template * t)777 void ata_release_transport(struct scsi_transport_template *t)
778 {
779 struct ata_internal *i = to_ata_internal(t);
780
781 transport_container_unregister(&i->t.host_attrs);
782 transport_container_unregister(&i->link_attr_cont);
783 transport_container_unregister(&i->dev_attr_cont);
784
785 kfree(i);
786 }
787
libata_transport_init(void)788 __init int libata_transport_init(void)
789 {
790 int error;
791
792 error = transport_class_register(&ata_link_class);
793 if (error)
794 goto out_unregister_transport;
795 error = transport_class_register(&ata_port_class);
796 if (error)
797 goto out_unregister_link;
798 error = transport_class_register(&ata_dev_class);
799 if (error)
800 goto out_unregister_port;
801 return 0;
802
803 out_unregister_port:
804 transport_class_unregister(&ata_port_class);
805 out_unregister_link:
806 transport_class_unregister(&ata_link_class);
807 out_unregister_transport:
808 return error;
809
810 }
811
libata_transport_exit(void)812 void __exit libata_transport_exit(void)
813 {
814 transport_class_unregister(&ata_link_class);
815 transport_class_unregister(&ata_port_class);
816 transport_class_unregister(&ata_dev_class);
817 }
818