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d9027470 GG |
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> | |
6a2148c6 | 30 | #include <linux/slab.h> |
d9027470 GG |
31 | #include <scsi/scsi_transport.h> |
32 | #include <linux/libata.h> | |
33 | #include <linux/hdreg.h> | |
34 | #include <linux/uaccess.h> | |
9ee4f393 | 35 | #include <linux/pm_runtime.h> |
d9027470 GG |
36 | |
37 | #include "libata.h" | |
38 | #include "libata-transport.h" | |
39 | ||
e628dc99 | 40 | #define ATA_PORT_ATTRS 3 |
d9027470 GG |
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_NONE, "none" } | |
147 | }; | |
148 | ata_bitfield_name_search(class, ata_class_names) | |
149 | ||
150 | ||
151 | static 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 | }; | |
167 | ata_bitfield_name_match(err, ata_err_names) | |
168 | ||
169 | static 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 | }; | |
198 | ata_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) \ | |
204 | static ssize_t \ | |
205 | show_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)) \ | |
215 | static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL) | |
216 | ||
217 | ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int); | |
218 | ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long); | |
e628dc99 | 219 | ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int); |
d9027470 GG |
220 | |
221 | static DECLARE_TRANSPORT_CLASS(ata_port_class, | |
222 | "ata_port", NULL, NULL, NULL); | |
223 | ||
224 | static 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 | */ | |
b0e73af7 | 236 | static int ata_is_port(const struct device *dev) |
d9027470 GG |
237 | { |
238 | return dev->release == ata_tport_release; | |
239 | } | |
240 | ||
241 | static 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 | */ | |
255 | void 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 | */ | |
277 | int 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); | |
5ef41082 | 284 | dev->type = &ata_port_type; |
d9027470 GG |
285 | |
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); | |
290 | error = device_add(dev); | |
291 | if (error) { | |
292 | goto tport_err; | |
293 | } | |
294 | ||
966f1212 | 295 | device_enable_async_suspend(dev); |
9ee4f393 LM |
296 | pm_runtime_set_active(dev); |
297 | pm_runtime_enable(dev); | |
0c8d32c2 | 298 | pm_runtime_forbid(dev); |
9ee4f393 | 299 | |
d9027470 GG |
300 | transport_add_device(dev); |
301 | transport_configure_device(dev); | |
302 | ||
303 | error = ata_tlink_add(&ap->link); | |
304 | if (error) { | |
305 | goto tport_link_err; | |
306 | } | |
307 | return 0; | |
308 | ||
309 | tport_link_err: | |
310 | transport_remove_device(dev); | |
311 | device_del(dev); | |
312 | ||
313 | tport_err: | |
314 | transport_destroy_device(dev); | |
315 | put_device(dev); | |
316 | return error; | |
317 | } | |
318 | ||
319 | ||
320 | /* | |
321 | * ATA link attributes | |
322 | */ | |
323 | ||
324 | ||
325 | #define ata_link_show_linkspeed(field) \ | |
326 | static ssize_t \ | |
327 | show_ata_link_##field(struct device *dev, \ | |
328 | struct device_attribute *attr, char *buf) \ | |
329 | { \ | |
330 | struct ata_link *link = transport_class_to_link(dev); \ | |
331 | \ | |
332 | return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \ | |
333 | } | |
334 | ||
335 | #define ata_link_linkspeed_attr(field) \ | |
336 | ata_link_show_linkspeed(field) \ | |
337 | static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) | |
338 | ||
339 | ata_link_linkspeed_attr(hw_sata_spd_limit); | |
340 | ata_link_linkspeed_attr(sata_spd_limit); | |
341 | ata_link_linkspeed_attr(sata_spd); | |
342 | ||
343 | ||
344 | static DECLARE_TRANSPORT_CLASS(ata_link_class, | |
345 | "ata_link", NULL, NULL, NULL); | |
346 | ||
347 | static void ata_tlink_release(struct device *dev) | |
348 | { | |
349 | put_device(dev->parent); | |
350 | } | |
351 | ||
352 | /** | |
353 | * ata_is_link -- check if a struct device represents a ATA link | |
354 | * @dev: device to check | |
355 | * | |
356 | * Returns: | |
357 | * %1 if the device represents a ATA link, %0 else | |
358 | */ | |
b0e73af7 | 359 | static int ata_is_link(const struct device *dev) |
d9027470 GG |
360 | { |
361 | return dev->release == ata_tlink_release; | |
362 | } | |
363 | ||
364 | static int ata_tlink_match(struct attribute_container *cont, | |
365 | struct device *dev) | |
366 | { | |
367 | struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); | |
368 | if (!ata_is_link(dev)) | |
369 | return 0; | |
370 | return &i->link_attr_cont.ac == cont; | |
371 | } | |
372 | ||
373 | /** | |
374 | * ata_tlink_delete -- remove ATA LINK | |
375 | * @port: ATA LINK to remove | |
376 | * | |
377 | * Removes the specified ATA LINK. remove associated ATA device(s) as well. | |
378 | */ | |
379 | void ata_tlink_delete(struct ata_link *link) | |
380 | { | |
381 | struct device *dev = &link->tdev; | |
382 | struct ata_device *ata_dev; | |
383 | ||
384 | ata_for_each_dev(ata_dev, link, ALL) { | |
385 | ata_tdev_delete(ata_dev); | |
386 | } | |
387 | ||
388 | transport_remove_device(dev); | |
389 | device_del(dev); | |
390 | transport_destroy_device(dev); | |
391 | put_device(dev); | |
392 | } | |
393 | ||
394 | /** | |
395 | * ata_tlink_add -- initialize a transport ATA link structure | |
396 | * @link: allocated ata_link structure. | |
397 | * | |
398 | * Initialize an ATA LINK structure for sysfs. It will be added in the | |
399 | * device tree below the ATA PORT it belongs to. | |
400 | * | |
401 | * Returns %0 on success | |
402 | */ | |
403 | int ata_tlink_add(struct ata_link *link) | |
404 | { | |
405 | struct device *dev = &link->tdev; | |
406 | struct ata_port *ap = link->ap; | |
407 | struct ata_device *ata_dev; | |
408 | int error; | |
409 | ||
410 | device_initialize(dev); | |
411 | dev->parent = get_device(&ap->tdev); | |
412 | dev->release = ata_tlink_release; | |
413 | if (ata_is_host_link(link)) | |
414 | dev_set_name(dev, "link%d", ap->print_id); | |
415 | else | |
416 | dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); | |
417 | ||
418 | transport_setup_device(dev); | |
419 | ||
420 | error = device_add(dev); | |
421 | if (error) { | |
422 | goto tlink_err; | |
423 | } | |
424 | ||
425 | transport_add_device(dev); | |
426 | transport_configure_device(dev); | |
427 | ||
428 | ata_for_each_dev(ata_dev, link, ALL) { | |
429 | error = ata_tdev_add(ata_dev); | |
430 | if (error) { | |
431 | goto tlink_dev_err; | |
432 | } | |
433 | } | |
434 | return 0; | |
435 | tlink_dev_err: | |
436 | while (--ata_dev >= link->device) { | |
437 | ata_tdev_delete(ata_dev); | |
438 | } | |
439 | transport_remove_device(dev); | |
440 | device_del(dev); | |
441 | tlink_err: | |
442 | transport_destroy_device(dev); | |
443 | put_device(dev); | |
444 | return error; | |
445 | } | |
446 | ||
447 | /* | |
448 | * ATA device attributes | |
449 | */ | |
450 | ||
451 | #define ata_dev_show_class(title, field) \ | |
452 | static ssize_t \ | |
453 | show_ata_dev_##field(struct device *dev, \ | |
454 | struct device_attribute *attr, char *buf) \ | |
455 | { \ | |
456 | struct ata_device *ata_dev = transport_class_to_dev(dev); \ | |
457 | \ | |
458 | return get_ata_##title##_names(ata_dev->field, buf); \ | |
459 | } | |
460 | ||
461 | #define ata_dev_attr(title, field) \ | |
462 | ata_dev_show_class(title, field) \ | |
463 | static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) | |
464 | ||
465 | ata_dev_attr(class, class); | |
466 | ata_dev_attr(xfer, pio_mode); | |
467 | ata_dev_attr(xfer, dma_mode); | |
468 | ata_dev_attr(xfer, xfer_mode); | |
469 | ||
470 | ||
471 | #define ata_dev_show_simple(field, format_string, cast) \ | |
472 | static ssize_t \ | |
473 | show_ata_dev_##field(struct device *dev, \ | |
474 | struct device_attribute *attr, char *buf) \ | |
475 | { \ | |
476 | struct ata_device *ata_dev = transport_class_to_dev(dev); \ | |
477 | \ | |
478 | return snprintf(buf, 20, format_string, cast ata_dev->field); \ | |
479 | } | |
480 | ||
481 | #define ata_dev_simple_attr(field, format_string, type) \ | |
482 | ata_dev_show_simple(field, format_string, (type)) \ | |
483 | static DEVICE_ATTR(field, S_IRUGO, \ | |
484 | show_ata_dev_##field, NULL) | |
485 | ||
486 | ata_dev_simple_attr(spdn_cnt, "%d\n", int); | |
487 | ||
488 | struct ata_show_ering_arg { | |
489 | char* buf; | |
490 | int written; | |
491 | }; | |
492 | ||
493 | static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) | |
494 | { | |
495 | struct ata_show_ering_arg* arg = void_arg; | |
496 | struct timespec time; | |
497 | ||
498 | jiffies_to_timespec(ent->timestamp,&time); | |
499 | arg->written += sprintf(arg->buf + arg->written, | |
500 | "[%5lu.%06lu]", | |
501 | time.tv_sec, time.tv_nsec); | |
502 | arg->written += get_ata_err_names(ent->err_mask, | |
503 | arg->buf + arg->written); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static ssize_t | |
508 | show_ata_dev_ering(struct device *dev, | |
509 | struct device_attribute *attr, char *buf) | |
510 | { | |
511 | struct ata_device *ata_dev = transport_class_to_dev(dev); | |
512 | struct ata_show_ering_arg arg = { buf, 0 }; | |
513 | ||
514 | ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); | |
515 | return arg.written; | |
516 | } | |
517 | ||
518 | ||
519 | static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); | |
520 | ||
521 | static ssize_t | |
522 | show_ata_dev_id(struct device *dev, | |
523 | struct device_attribute *attr, char *buf) | |
524 | { | |
525 | struct ata_device *ata_dev = transport_class_to_dev(dev); | |
526 | int written = 0, i = 0; | |
527 | ||
528 | if (ata_dev->class == ATA_DEV_PMP) | |
529 | return 0; | |
530 | for(i=0;i<ATA_ID_WORDS;i++) { | |
531 | written += snprintf(buf+written, 20, "%04x%c", | |
532 | ata_dev->id[i], | |
533 | ((i+1) & 7) ? ' ' : '\n'); | |
534 | } | |
535 | return written; | |
536 | } | |
537 | ||
538 | static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); | |
539 | ||
540 | static ssize_t | |
541 | show_ata_dev_gscr(struct device *dev, | |
542 | struct device_attribute *attr, char *buf) | |
543 | { | |
544 | struct ata_device *ata_dev = transport_class_to_dev(dev); | |
545 | int written = 0, i = 0; | |
546 | ||
547 | if (ata_dev->class != ATA_DEV_PMP) | |
548 | return 0; | |
549 | for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { | |
550 | written += snprintf(buf+written, 20, "%08x%c", | |
551 | ata_dev->gscr[i], | |
552 | ((i+1) & 3) ? ' ' : '\n'); | |
553 | } | |
554 | if (SATA_PMP_GSCR_DWORDS & 3) | |
555 | buf[written-1] = '\n'; | |
556 | return written; | |
557 | } | |
558 | ||
559 | static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); | |
560 | ||
561 | static DECLARE_TRANSPORT_CLASS(ata_dev_class, | |
562 | "ata_device", NULL, NULL, NULL); | |
563 | ||
564 | static void ata_tdev_release(struct device *dev) | |
565 | { | |
566 | put_device(dev->parent); | |
567 | } | |
568 | ||
569 | /** | |
570 | * ata_is_ata_dev -- check if a struct device represents a ATA device | |
571 | * @dev: device to check | |
572 | * | |
573 | * Returns: | |
574 | * %1 if the device represents a ATA device, %0 else | |
575 | */ | |
b0e73af7 | 576 | static int ata_is_ata_dev(const struct device *dev) |
d9027470 GG |
577 | { |
578 | return dev->release == ata_tdev_release; | |
579 | } | |
580 | ||
581 | static int ata_tdev_match(struct attribute_container *cont, | |
582 | struct device *dev) | |
583 | { | |
584 | struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); | |
585 | if (!ata_is_ata_dev(dev)) | |
586 | return 0; | |
587 | return &i->dev_attr_cont.ac == cont; | |
588 | } | |
589 | ||
590 | /** | |
591 | * ata_tdev_free -- free a ATA LINK | |
592 | * @dev: ATA PHY to free | |
593 | * | |
594 | * Frees the specified ATA PHY. | |
595 | * | |
596 | * Note: | |
597 | * This function must only be called on a PHY that has not | |
598 | * successfully been added using ata_tdev_add(). | |
599 | */ | |
600 | static void ata_tdev_free(struct ata_device *dev) | |
601 | { | |
602 | transport_destroy_device(&dev->tdev); | |
603 | put_device(&dev->tdev); | |
604 | } | |
605 | ||
606 | /** | |
607 | * ata_tdev_delete -- remove ATA device | |
608 | * @port: ATA PORT to remove | |
609 | * | |
610 | * Removes the specified ATA device. | |
611 | */ | |
612 | static void ata_tdev_delete(struct ata_device *ata_dev) | |
613 | { | |
614 | struct device *dev = &ata_dev->tdev; | |
615 | ||
616 | transport_remove_device(dev); | |
617 | device_del(dev); | |
618 | ata_tdev_free(ata_dev); | |
619 | } | |
620 | ||
621 | ||
622 | /** | |
623 | * ata_tdev_add -- initialize a transport ATA device structure. | |
624 | * @ata_dev: ata_dev structure. | |
625 | * | |
626 | * Initialize an ATA device structure for sysfs. It will be added in the | |
627 | * device tree below the ATA LINK device it belongs to. | |
628 | * | |
629 | * Returns %0 on success | |
630 | */ | |
631 | static int ata_tdev_add(struct ata_device *ata_dev) | |
632 | { | |
633 | struct device *dev = &ata_dev->tdev; | |
634 | struct ata_link *link = ata_dev->link; | |
635 | struct ata_port *ap = link->ap; | |
636 | int error; | |
637 | ||
638 | device_initialize(dev); | |
639 | dev->parent = get_device(&link->tdev); | |
640 | dev->release = ata_tdev_release; | |
641 | if (ata_is_host_link(link)) | |
642 | dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); | |
643 | else | |
644 | dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); | |
645 | ||
646 | transport_setup_device(dev); | |
647 | error = device_add(dev); | |
648 | if (error) { | |
649 | ata_tdev_free(ata_dev); | |
650 | return error; | |
651 | } | |
652 | ||
653 | transport_add_device(dev); | |
654 | transport_configure_device(dev); | |
655 | return 0; | |
656 | } | |
657 | ||
658 | ||
659 | /* | |
660 | * Setup / Teardown code | |
661 | */ | |
662 | ||
663 | #define SETUP_TEMPLATE(attrb, field, perm, test) \ | |
664 | i->private_##attrb[count] = dev_attr_##field; \ | |
665 | i->private_##attrb[count].attr.mode = perm; \ | |
666 | i->attrb[count] = &i->private_##attrb[count]; \ | |
667 | if (test) \ | |
668 | count++ | |
669 | ||
670 | #define SETUP_LINK_ATTRIBUTE(field) \ | |
671 | SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) | |
672 | ||
673 | #define SETUP_PORT_ATTRIBUTE(field) \ | |
674 | SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) | |
675 | ||
676 | #define SETUP_DEV_ATTRIBUTE(field) \ | |
677 | SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) | |
678 | ||
679 | /** | |
680 | * ata_attach_transport -- instantiate ATA transport template | |
681 | */ | |
682 | struct scsi_transport_template *ata_attach_transport(void) | |
683 | { | |
684 | struct ata_internal *i; | |
685 | int count; | |
686 | ||
687 | i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); | |
688 | if (!i) | |
689 | return NULL; | |
690 | ||
691 | i->t.eh_strategy_handler = ata_scsi_error; | |
692 | i->t.eh_timed_out = ata_scsi_timed_out; | |
693 | i->t.user_scan = ata_scsi_user_scan; | |
694 | ||
695 | i->t.host_attrs.ac.attrs = &i->port_attrs[0]; | |
696 | i->t.host_attrs.ac.class = &ata_port_class.class; | |
697 | i->t.host_attrs.ac.match = ata_tport_match; | |
698 | transport_container_register(&i->t.host_attrs); | |
699 | ||
700 | i->link_attr_cont.ac.class = &ata_link_class.class; | |
701 | i->link_attr_cont.ac.attrs = &i->link_attrs[0]; | |
702 | i->link_attr_cont.ac.match = ata_tlink_match; | |
703 | transport_container_register(&i->link_attr_cont); | |
704 | ||
705 | i->dev_attr_cont.ac.class = &ata_dev_class.class; | |
706 | i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; | |
707 | i->dev_attr_cont.ac.match = ata_tdev_match; | |
708 | transport_container_register(&i->dev_attr_cont); | |
709 | ||
710 | count = 0; | |
711 | SETUP_PORT_ATTRIBUTE(nr_pmp_links); | |
712 | SETUP_PORT_ATTRIBUTE(idle_irq); | |
e628dc99 | 713 | SETUP_PORT_ATTRIBUTE(port_no); |
d9027470 GG |
714 | BUG_ON(count > ATA_PORT_ATTRS); |
715 | i->port_attrs[count] = NULL; | |
716 | ||
717 | count = 0; | |
718 | SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); | |
719 | SETUP_LINK_ATTRIBUTE(sata_spd_limit); | |
720 | SETUP_LINK_ATTRIBUTE(sata_spd); | |
721 | BUG_ON(count > ATA_LINK_ATTRS); | |
722 | i->link_attrs[count] = NULL; | |
723 | ||
724 | count = 0; | |
725 | SETUP_DEV_ATTRIBUTE(class); | |
726 | SETUP_DEV_ATTRIBUTE(pio_mode); | |
727 | SETUP_DEV_ATTRIBUTE(dma_mode); | |
728 | SETUP_DEV_ATTRIBUTE(xfer_mode); | |
729 | SETUP_DEV_ATTRIBUTE(spdn_cnt); | |
730 | SETUP_DEV_ATTRIBUTE(ering); | |
731 | SETUP_DEV_ATTRIBUTE(id); | |
732 | SETUP_DEV_ATTRIBUTE(gscr); | |
733 | BUG_ON(count > ATA_DEV_ATTRS); | |
734 | i->dev_attrs[count] = NULL; | |
735 | ||
736 | return &i->t; | |
737 | } | |
738 | ||
739 | /** | |
740 | * ata_release_transport -- release ATA transport template instance | |
741 | * @t: transport template instance | |
742 | */ | |
743 | void ata_release_transport(struct scsi_transport_template *t) | |
744 | { | |
745 | struct ata_internal *i = to_ata_internal(t); | |
746 | ||
747 | transport_container_unregister(&i->t.host_attrs); | |
748 | transport_container_unregister(&i->link_attr_cont); | |
749 | transport_container_unregister(&i->dev_attr_cont); | |
750 | ||
751 | kfree(i); | |
752 | } | |
753 | ||
754 | __init int libata_transport_init(void) | |
755 | { | |
756 | int error; | |
757 | ||
758 | error = transport_class_register(&ata_link_class); | |
759 | if (error) | |
760 | goto out_unregister_transport; | |
761 | error = transport_class_register(&ata_port_class); | |
762 | if (error) | |
763 | goto out_unregister_link; | |
764 | error = transport_class_register(&ata_dev_class); | |
765 | if (error) | |
766 | goto out_unregister_port; | |
767 | return 0; | |
768 | ||
769 | out_unregister_port: | |
770 | transport_class_unregister(&ata_port_class); | |
771 | out_unregister_link: | |
772 | transport_class_unregister(&ata_link_class); | |
773 | out_unregister_transport: | |
774 | return error; | |
775 | ||
776 | } | |
777 | ||
778 | void __exit libata_transport_exit(void) | |
779 | { | |
780 | transport_class_unregister(&ata_link_class); | |
781 | transport_class_unregister(&ata_port_class); | |
782 | transport_class_unregister(&ata_dev_class); | |
783 | } |