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 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 scnprintf(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 | |
225 | static void ata_tport_release(struct device *dev) |
226 | { |
227 | struct ata_port *ap = tdev_to_port(dev); |
228 | ata_host_put(host: 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 | */ |
238 | static int ata_is_port(const struct device *dev) |
239 | { |
240 | return dev->release == ata_tport_release; |
241 | } |
242 | |
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 | * @ap: ATA PORT to remove |
254 | * |
255 | * Removes the specified ATA PORT. Remove the associated link as well. |
256 | */ |
257 | void ata_tport_delete(struct ata_port *ap) |
258 | { |
259 | struct device *dev = &ap->tdev; |
260 | |
261 | ata_tlink_delete(link: &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 | */ |
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(host: ap->host); |
297 | dev->release = ata_tport_release; |
298 | dev_set_name(dev, name: "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 | error = transport_add_device(dev); |
312 | if (error) |
313 | goto tport_transport_add_err; |
314 | transport_configure_device(dev); |
315 | |
316 | error = ata_tlink_add(link: &ap->link); |
317 | if (error) { |
318 | goto tport_link_err; |
319 | } |
320 | return 0; |
321 | |
322 | tport_link_err: |
323 | transport_remove_device(dev); |
324 | tport_transport_add_err: |
325 | device_del(dev); |
326 | |
327 | tport_err: |
328 | transport_destroy_device(dev); |
329 | put_device(dev); |
330 | return error; |
331 | } |
332 | |
333 | /** |
334 | * ata_port_classify - determine device type based on ATA-spec signature |
335 | * @ap: ATA port device on which the classification should be run |
336 | * @tf: ATA taskfile register set for device to be identified |
337 | * |
338 | * A wrapper around ata_dev_classify() to provide additional logging |
339 | * |
340 | * RETURNS: |
341 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, |
342 | * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. |
343 | */ |
344 | unsigned int ata_port_classify(struct ata_port *ap, |
345 | const struct ata_taskfile *tf) |
346 | { |
347 | int i; |
348 | unsigned int class = ata_dev_classify(tf); |
349 | |
350 | /* Start with index '1' to skip the 'unknown' entry */ |
351 | for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) { |
352 | if (ata_class_names[i].value == class) { |
353 | ata_port_dbg(ap, "found %s device by sig\n" , |
354 | ata_class_names[i].name); |
355 | return class; |
356 | } |
357 | } |
358 | |
359 | ata_port_info(ap, "found unknown device (class %u)\n" , class); |
360 | return class; |
361 | } |
362 | EXPORT_SYMBOL_GPL(ata_port_classify); |
363 | |
364 | /* |
365 | * ATA link attributes |
366 | */ |
367 | static int noop(int x) { return x; } |
368 | |
369 | #define ata_link_show_linkspeed(field, format) \ |
370 | static ssize_t \ |
371 | show_ata_link_##field(struct device *dev, \ |
372 | struct device_attribute *attr, char *buf) \ |
373 | { \ |
374 | struct ata_link *link = transport_class_to_link(dev); \ |
375 | \ |
376 | return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ |
377 | } |
378 | |
379 | #define ata_link_linkspeed_attr(field, format) \ |
380 | ata_link_show_linkspeed(field, format) \ |
381 | static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) |
382 | |
383 | ata_link_linkspeed_attr(hw_sata_spd_limit, fls); |
384 | ata_link_linkspeed_attr(sata_spd_limit, fls); |
385 | ata_link_linkspeed_attr(sata_spd, noop); |
386 | |
387 | |
388 | static DECLARE_TRANSPORT_CLASS(ata_link_class, |
389 | "ata_link" , NULL, NULL, NULL); |
390 | |
391 | static void ata_tlink_release(struct device *dev) |
392 | { |
393 | } |
394 | |
395 | /** |
396 | * ata_is_link -- check if a struct device represents a ATA link |
397 | * @dev: device to check |
398 | * |
399 | * Returns: |
400 | * %1 if the device represents a ATA link, %0 else |
401 | */ |
402 | static int ata_is_link(const struct device *dev) |
403 | { |
404 | return dev->release == ata_tlink_release; |
405 | } |
406 | |
407 | static int ata_tlink_match(struct attribute_container *cont, |
408 | struct device *dev) |
409 | { |
410 | struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); |
411 | if (!ata_is_link(dev)) |
412 | return 0; |
413 | return &i->link_attr_cont.ac == cont; |
414 | } |
415 | |
416 | /** |
417 | * ata_tlink_delete -- remove ATA LINK |
418 | * @link: ATA LINK to remove |
419 | * |
420 | * Removes the specified ATA LINK. remove associated ATA device(s) as well. |
421 | */ |
422 | void ata_tlink_delete(struct ata_link *link) |
423 | { |
424 | struct device *dev = &link->tdev; |
425 | struct ata_device *ata_dev; |
426 | |
427 | ata_for_each_dev(ata_dev, link, ALL) { |
428 | ata_tdev_delete(dev: ata_dev); |
429 | } |
430 | |
431 | transport_remove_device(dev); |
432 | device_del(dev); |
433 | transport_destroy_device(dev); |
434 | put_device(dev); |
435 | } |
436 | |
437 | /** |
438 | * ata_tlink_add -- initialize a transport ATA link structure |
439 | * @link: allocated ata_link structure. |
440 | * |
441 | * Initialize an ATA LINK structure for sysfs. It will be added in the |
442 | * device tree below the ATA PORT it belongs to. |
443 | * |
444 | * Returns %0 on success |
445 | */ |
446 | int ata_tlink_add(struct ata_link *link) |
447 | { |
448 | struct device *dev = &link->tdev; |
449 | struct ata_port *ap = link->ap; |
450 | struct ata_device *ata_dev; |
451 | int error; |
452 | |
453 | device_initialize(dev); |
454 | dev->parent = &ap->tdev; |
455 | dev->release = ata_tlink_release; |
456 | if (ata_is_host_link(link)) |
457 | dev_set_name(dev, name: "link%d" , ap->print_id); |
458 | else |
459 | dev_set_name(dev, name: "link%d.%d" , ap->print_id, link->pmp); |
460 | |
461 | transport_setup_device(dev); |
462 | |
463 | error = device_add(dev); |
464 | if (error) { |
465 | goto tlink_err; |
466 | } |
467 | |
468 | error = transport_add_device(dev); |
469 | if (error) |
470 | goto tlink_transport_err; |
471 | transport_configure_device(dev); |
472 | |
473 | ata_for_each_dev(ata_dev, link, ALL) { |
474 | error = ata_tdev_add(dev: ata_dev); |
475 | if (error) { |
476 | goto tlink_dev_err; |
477 | } |
478 | } |
479 | return 0; |
480 | tlink_dev_err: |
481 | while (--ata_dev >= link->device) { |
482 | ata_tdev_delete(dev: ata_dev); |
483 | } |
484 | transport_remove_device(dev); |
485 | tlink_transport_err: |
486 | device_del(dev); |
487 | tlink_err: |
488 | transport_destroy_device(dev); |
489 | put_device(dev); |
490 | return error; |
491 | } |
492 | |
493 | /* |
494 | * ATA device attributes |
495 | */ |
496 | |
497 | #define ata_dev_show_class(title, field) \ |
498 | static ssize_t \ |
499 | show_ata_dev_##field(struct device *dev, \ |
500 | struct device_attribute *attr, char *buf) \ |
501 | { \ |
502 | struct ata_device *ata_dev = transport_class_to_dev(dev); \ |
503 | \ |
504 | return get_ata_##title##_names(ata_dev->field, buf); \ |
505 | } |
506 | |
507 | #define ata_dev_attr(title, field) \ |
508 | ata_dev_show_class(title, field) \ |
509 | static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) |
510 | |
511 | ata_dev_attr(class, class); |
512 | ata_dev_attr(xfer, pio_mode); |
513 | ata_dev_attr(xfer, dma_mode); |
514 | ata_dev_attr(xfer, xfer_mode); |
515 | |
516 | |
517 | #define ata_dev_show_simple(field, format_string, cast) \ |
518 | static ssize_t \ |
519 | show_ata_dev_##field(struct device *dev, \ |
520 | struct device_attribute *attr, char *buf) \ |
521 | { \ |
522 | struct ata_device *ata_dev = transport_class_to_dev(dev); \ |
523 | \ |
524 | return scnprintf(buf, 20, format_string, cast ata_dev->field); \ |
525 | } |
526 | |
527 | #define ata_dev_simple_attr(field, format_string, type) \ |
528 | ata_dev_show_simple(field, format_string, (type)) \ |
529 | static DEVICE_ATTR(field, S_IRUGO, \ |
530 | show_ata_dev_##field, NULL) |
531 | |
532 | ata_dev_simple_attr(spdn_cnt, "%d\n" , int); |
533 | |
534 | struct ata_show_ering_arg { |
535 | char* buf; |
536 | int written; |
537 | }; |
538 | |
539 | static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) |
540 | { |
541 | struct ata_show_ering_arg* arg = void_arg; |
542 | u64 seconds; |
543 | u32 rem; |
544 | |
545 | seconds = div_u64_rem(dividend: ent->timestamp, HZ, remainder: &rem); |
546 | arg->written += sprintf(buf: arg->buf + arg->written, |
547 | fmt: "[%5llu.%09lu]" , seconds, |
548 | rem * NSEC_PER_SEC / HZ); |
549 | arg->written += get_ata_err_names(table_key: ent->err_mask, |
550 | buf: arg->buf + arg->written); |
551 | return 0; |
552 | } |
553 | |
554 | static ssize_t |
555 | show_ata_dev_ering(struct device *dev, |
556 | struct device_attribute *attr, char *buf) |
557 | { |
558 | struct ata_device *ata_dev = transport_class_to_dev(dev); |
559 | struct ata_show_ering_arg arg = { buf, 0 }; |
560 | |
561 | ata_ering_map(ering: &ata_dev->ering, map_fn: ata_show_ering, arg: &arg); |
562 | return arg.written; |
563 | } |
564 | |
565 | |
566 | static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); |
567 | |
568 | static ssize_t |
569 | show_ata_dev_id(struct device *dev, |
570 | struct device_attribute *attr, char *buf) |
571 | { |
572 | struct ata_device *ata_dev = transport_class_to_dev(dev); |
573 | int written = 0, i = 0; |
574 | |
575 | if (ata_dev->class == ATA_DEV_PMP) |
576 | return 0; |
577 | for(i=0;i<ATA_ID_WORDS;i++) { |
578 | written += scnprintf(buf: buf+written, size: 20, fmt: "%04x%c" , |
579 | ata_dev->id[i], |
580 | ((i+1) & 7) ? ' ' : '\n'); |
581 | } |
582 | return written; |
583 | } |
584 | |
585 | static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); |
586 | |
587 | static ssize_t |
588 | show_ata_dev_gscr(struct device *dev, |
589 | struct device_attribute *attr, char *buf) |
590 | { |
591 | struct ata_device *ata_dev = transport_class_to_dev(dev); |
592 | int written = 0, i = 0; |
593 | |
594 | if (ata_dev->class != ATA_DEV_PMP) |
595 | return 0; |
596 | for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { |
597 | written += scnprintf(buf: buf+written, size: 20, fmt: "%08x%c" , |
598 | ata_dev->gscr[i], |
599 | ((i+1) & 3) ? ' ' : '\n'); |
600 | } |
601 | if (SATA_PMP_GSCR_DWORDS & 3) |
602 | buf[written-1] = '\n'; |
603 | return written; |
604 | } |
605 | |
606 | static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); |
607 | |
608 | static ssize_t |
609 | show_ata_dev_trim(struct device *dev, |
610 | struct device_attribute *attr, char *buf) |
611 | { |
612 | struct ata_device *ata_dev = transport_class_to_dev(dev); |
613 | unsigned char *mode; |
614 | |
615 | if (!ata_id_has_trim(id: ata_dev->id)) |
616 | mode = "unsupported" ; |
617 | else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) |
618 | mode = "forced_unsupported" ; |
619 | else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) |
620 | mode = "forced_unqueued" ; |
621 | else if (ata_fpdma_dsm_supported(dev: ata_dev)) |
622 | mode = "queued" ; |
623 | else |
624 | mode = "unqueued" ; |
625 | |
626 | return scnprintf(buf, size: 20, fmt: "%s\n" , mode); |
627 | } |
628 | |
629 | static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); |
630 | |
631 | static DECLARE_TRANSPORT_CLASS(ata_dev_class, |
632 | "ata_device" , NULL, NULL, NULL); |
633 | |
634 | static void ata_tdev_release(struct device *dev) |
635 | { |
636 | } |
637 | |
638 | /** |
639 | * ata_is_ata_dev -- check if a struct device represents a ATA device |
640 | * @dev: device to check |
641 | * |
642 | * Returns: |
643 | * %1 if the device represents a ATA device, %0 else |
644 | */ |
645 | static int ata_is_ata_dev(const struct device *dev) |
646 | { |
647 | return dev->release == ata_tdev_release; |
648 | } |
649 | |
650 | static int ata_tdev_match(struct attribute_container *cont, |
651 | struct device *dev) |
652 | { |
653 | struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); |
654 | if (!ata_is_ata_dev(dev)) |
655 | return 0; |
656 | return &i->dev_attr_cont.ac == cont; |
657 | } |
658 | |
659 | /** |
660 | * ata_tdev_free -- free a ATA LINK |
661 | * @dev: ATA PHY to free |
662 | * |
663 | * Frees the specified ATA PHY. |
664 | * |
665 | * Note: |
666 | * This function must only be called on a PHY that has not |
667 | * successfully been added using ata_tdev_add(). |
668 | */ |
669 | static void ata_tdev_free(struct ata_device *dev) |
670 | { |
671 | transport_destroy_device(&dev->tdev); |
672 | put_device(dev: &dev->tdev); |
673 | } |
674 | |
675 | /** |
676 | * ata_tdev_delete -- remove ATA device |
677 | * @ata_dev: ATA device to remove |
678 | * |
679 | * Removes the specified ATA device. |
680 | */ |
681 | static void ata_tdev_delete(struct ata_device *ata_dev) |
682 | { |
683 | struct device *dev = &ata_dev->tdev; |
684 | |
685 | transport_remove_device(dev); |
686 | device_del(dev); |
687 | ata_tdev_free(dev: ata_dev); |
688 | } |
689 | |
690 | |
691 | /** |
692 | * ata_tdev_add -- initialize a transport ATA device structure. |
693 | * @ata_dev: ata_dev structure. |
694 | * |
695 | * Initialize an ATA device structure for sysfs. It will be added in the |
696 | * device tree below the ATA LINK device it belongs to. |
697 | * |
698 | * Returns %0 on success |
699 | */ |
700 | static int ata_tdev_add(struct ata_device *ata_dev) |
701 | { |
702 | struct device *dev = &ata_dev->tdev; |
703 | struct ata_link *link = ata_dev->link; |
704 | struct ata_port *ap = link->ap; |
705 | int error; |
706 | |
707 | device_initialize(dev); |
708 | dev->parent = &link->tdev; |
709 | dev->release = ata_tdev_release; |
710 | if (ata_is_host_link(link)) |
711 | dev_set_name(dev, name: "dev%d.%d" , ap->print_id,ata_dev->devno); |
712 | else |
713 | dev_set_name(dev, name: "dev%d.%d.0" , ap->print_id, link->pmp); |
714 | |
715 | transport_setup_device(dev); |
716 | ata_acpi_bind_dev(dev: ata_dev); |
717 | error = device_add(dev); |
718 | if (error) { |
719 | ata_tdev_free(dev: ata_dev); |
720 | return error; |
721 | } |
722 | |
723 | error = transport_add_device(dev); |
724 | if (error) { |
725 | device_del(dev); |
726 | ata_tdev_free(dev: ata_dev); |
727 | return error; |
728 | } |
729 | |
730 | transport_configure_device(dev); |
731 | return 0; |
732 | } |
733 | |
734 | |
735 | /* |
736 | * Setup / Teardown code |
737 | */ |
738 | |
739 | #define SETUP_TEMPLATE(attrb, field, perm, test) \ |
740 | i->private_##attrb[count] = dev_attr_##field; \ |
741 | i->private_##attrb[count].attr.mode = perm; \ |
742 | i->attrb[count] = &i->private_##attrb[count]; \ |
743 | if (test) \ |
744 | count++ |
745 | |
746 | #define SETUP_LINK_ATTRIBUTE(field) \ |
747 | SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) |
748 | |
749 | #define SETUP_PORT_ATTRIBUTE(field) \ |
750 | SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) |
751 | |
752 | #define SETUP_DEV_ATTRIBUTE(field) \ |
753 | SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) |
754 | |
755 | /** |
756 | * ata_attach_transport -- instantiate ATA transport template |
757 | */ |
758 | struct scsi_transport_template *ata_attach_transport(void) |
759 | { |
760 | struct ata_internal *i; |
761 | int count; |
762 | |
763 | i = kzalloc(size: sizeof(struct ata_internal), GFP_KERNEL); |
764 | if (!i) |
765 | return NULL; |
766 | |
767 | i->t.eh_strategy_handler = ata_scsi_error; |
768 | i->t.user_scan = ata_scsi_user_scan; |
769 | |
770 | i->t.host_attrs.ac.attrs = &i->port_attrs[0]; |
771 | i->t.host_attrs.ac.class = &ata_port_class.class; |
772 | i->t.host_attrs.ac.match = ata_tport_match; |
773 | transport_container_register(tc: &i->t.host_attrs); |
774 | |
775 | i->link_attr_cont.ac.class = &ata_link_class.class; |
776 | i->link_attr_cont.ac.attrs = &i->link_attrs[0]; |
777 | i->link_attr_cont.ac.match = ata_tlink_match; |
778 | transport_container_register(tc: &i->link_attr_cont); |
779 | |
780 | i->dev_attr_cont.ac.class = &ata_dev_class.class; |
781 | i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; |
782 | i->dev_attr_cont.ac.match = ata_tdev_match; |
783 | transport_container_register(tc: &i->dev_attr_cont); |
784 | |
785 | count = 0; |
786 | SETUP_PORT_ATTRIBUTE(nr_pmp_links); |
787 | SETUP_PORT_ATTRIBUTE(idle_irq); |
788 | SETUP_PORT_ATTRIBUTE(port_no); |
789 | BUG_ON(count > ATA_PORT_ATTRS); |
790 | i->port_attrs[count] = NULL; |
791 | |
792 | count = 0; |
793 | SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); |
794 | SETUP_LINK_ATTRIBUTE(sata_spd_limit); |
795 | SETUP_LINK_ATTRIBUTE(sata_spd); |
796 | BUG_ON(count > ATA_LINK_ATTRS); |
797 | i->link_attrs[count] = NULL; |
798 | |
799 | count = 0; |
800 | SETUP_DEV_ATTRIBUTE(class); |
801 | SETUP_DEV_ATTRIBUTE(pio_mode); |
802 | SETUP_DEV_ATTRIBUTE(dma_mode); |
803 | SETUP_DEV_ATTRIBUTE(xfer_mode); |
804 | SETUP_DEV_ATTRIBUTE(spdn_cnt); |
805 | SETUP_DEV_ATTRIBUTE(ering); |
806 | SETUP_DEV_ATTRIBUTE(id); |
807 | SETUP_DEV_ATTRIBUTE(gscr); |
808 | SETUP_DEV_ATTRIBUTE(trim); |
809 | BUG_ON(count > ATA_DEV_ATTRS); |
810 | i->dev_attrs[count] = NULL; |
811 | |
812 | return &i->t; |
813 | } |
814 | |
815 | /** |
816 | * ata_release_transport -- release ATA transport template instance |
817 | * @t: transport template instance |
818 | */ |
819 | void ata_release_transport(struct scsi_transport_template *t) |
820 | { |
821 | struct ata_internal *i = to_ata_internal(t); |
822 | |
823 | transport_container_unregister(tc: &i->t.host_attrs); |
824 | transport_container_unregister(tc: &i->link_attr_cont); |
825 | transport_container_unregister(tc: &i->dev_attr_cont); |
826 | |
827 | kfree(objp: i); |
828 | } |
829 | |
830 | __init int libata_transport_init(void) |
831 | { |
832 | int error; |
833 | |
834 | error = transport_class_register(&ata_link_class); |
835 | if (error) |
836 | goto out_unregister_transport; |
837 | error = transport_class_register(&ata_port_class); |
838 | if (error) |
839 | goto out_unregister_link; |
840 | error = transport_class_register(&ata_dev_class); |
841 | if (error) |
842 | goto out_unregister_port; |
843 | return 0; |
844 | |
845 | out_unregister_port: |
846 | transport_class_unregister(&ata_port_class); |
847 | out_unregister_link: |
848 | transport_class_unregister(&ata_link_class); |
849 | out_unregister_transport: |
850 | return error; |
851 | |
852 | } |
853 | |
854 | void __exit libata_transport_exit(void) |
855 | { |
856 | transport_class_unregister(&ata_link_class); |
857 | transport_class_unregister(&ata_port_class); |
858 | transport_class_unregister(&ata_dev_class); |
859 | } |
860 | |