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1da177e4 LT |
1 | /* |
2 | * PCI HotPlug Controller Core | |
3 | * | |
4 | * Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com) | |
5 | * Copyright (C) 2001-2002 IBM Corp. | |
6 | * | |
7 | * All rights reserved. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
17 | * NON INFRINGEMENT. See the GNU General Public License for more | |
18 | * details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * | |
24 | * Send feedback to <greg@kroah.com> | |
25 | * | |
26 | * Filesystem portion based on work done by Pat Mochel on ddfs/driverfs | |
27 | * | |
28 | */ | |
29 | ||
30 | #include <linux/config.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/moduleparam.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/list.h> | |
36 | #include <linux/pagemap.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/smp_lock.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/mount.h> | |
41 | #include <linux/namei.h> | |
42 | #include <linux/pci.h> | |
43 | #include <asm/uaccess.h> | |
44 | #include <linux/kobject.h> | |
45 | #include <linux/sysfs.h> | |
46 | #include "pci_hotplug.h" | |
47 | ||
48 | ||
49 | #define MY_NAME "pci_hotplug" | |
50 | ||
51 | #define dbg(fmt, arg...) do { if (debug) printk(KERN_DEBUG "%s: %s: " fmt , MY_NAME , __FUNCTION__ , ## arg); } while (0) | |
52 | #define err(format, arg...) printk(KERN_ERR "%s: " format , MY_NAME , ## arg) | |
53 | #define info(format, arg...) printk(KERN_INFO "%s: " format , MY_NAME , ## arg) | |
54 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format , MY_NAME , ## arg) | |
55 | ||
56 | ||
57 | /* local variables */ | |
58 | static int debug; | |
59 | ||
60 | #define DRIVER_VERSION "0.5" | |
61 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Scott Murray <scottm@somanetworks.com>" | |
62 | #define DRIVER_DESC "PCI Hot Plug PCI Core" | |
63 | ||
64 | ||
65 | ////////////////////////////////////////////////////////////////// | |
66 | ||
67 | static LIST_HEAD(pci_hotplug_slot_list); | |
68 | ||
69 | struct subsystem pci_hotplug_slots_subsys; | |
70 | ||
71 | static ssize_t hotplug_slot_attr_show(struct kobject *kobj, | |
72 | struct attribute *attr, char *buf) | |
73 | { | |
74 | struct hotplug_slot *slot = to_hotplug_slot(kobj); | |
75 | struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr); | |
fc7e4828 | 76 | return attribute->show ? attribute->show(slot, buf) : -EIO; |
1da177e4 LT |
77 | } |
78 | ||
79 | static ssize_t hotplug_slot_attr_store(struct kobject *kobj, | |
80 | struct attribute *attr, const char *buf, size_t len) | |
81 | { | |
82 | struct hotplug_slot *slot = to_hotplug_slot(kobj); | |
83 | struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr); | |
fc7e4828 | 84 | return attribute->store ? attribute->store(slot, buf, len) : -EIO; |
1da177e4 LT |
85 | } |
86 | ||
87 | static struct sysfs_ops hotplug_slot_sysfs_ops = { | |
88 | .show = hotplug_slot_attr_show, | |
89 | .store = hotplug_slot_attr_store, | |
90 | }; | |
91 | ||
92 | static void hotplug_slot_release(struct kobject *kobj) | |
93 | { | |
94 | struct hotplug_slot *slot = to_hotplug_slot(kobj); | |
95 | if (slot->release) | |
96 | slot->release(slot); | |
97 | } | |
98 | ||
99 | static struct kobj_type hotplug_slot_ktype = { | |
100 | .sysfs_ops = &hotplug_slot_sysfs_ops, | |
101 | .release = &hotplug_slot_release, | |
102 | }; | |
103 | ||
104 | decl_subsys_name(pci_hotplug_slots, slots, &hotplug_slot_ktype, NULL); | |
105 | ||
106 | /* these strings match up with the values in pci_bus_speed */ | |
107 | static char *pci_bus_speed_strings[] = { | |
108 | "33 MHz PCI", /* 0x00 */ | |
109 | "66 MHz PCI", /* 0x01 */ | |
110 | "66 MHz PCIX", /* 0x02 */ | |
111 | "100 MHz PCIX", /* 0x03 */ | |
112 | "133 MHz PCIX", /* 0x04 */ | |
113 | NULL, /* 0x05 */ | |
114 | NULL, /* 0x06 */ | |
115 | NULL, /* 0x07 */ | |
116 | NULL, /* 0x08 */ | |
117 | "66 MHz PCIX 266", /* 0x09 */ | |
118 | "100 MHz PCIX 266", /* 0x0a */ | |
119 | "133 MHz PCIX 266", /* 0x0b */ | |
120 | NULL, /* 0x0c */ | |
121 | NULL, /* 0x0d */ | |
122 | NULL, /* 0x0e */ | |
123 | NULL, /* 0x0f */ | |
124 | NULL, /* 0x10 */ | |
125 | "66 MHz PCIX 533", /* 0x11 */ | |
126 | "100 MHz PCIX 533", /* 0x12 */ | |
127 | "133 MHz PCIX 533", /* 0x13 */ | |
128 | "25 GBps PCI-E", /* 0x14 */ | |
129 | }; | |
130 | ||
131 | #ifdef CONFIG_HOTPLUG_PCI_CPCI | |
132 | extern int cpci_hotplug_init(int debug); | |
133 | extern void cpci_hotplug_exit(void); | |
134 | #else | |
135 | static inline int cpci_hotplug_init(int debug) { return 0; } | |
136 | static inline void cpci_hotplug_exit(void) { } | |
137 | #endif | |
138 | ||
139 | /* Weee, fun with macros... */ | |
140 | #define GET_STATUS(name,type) \ | |
141 | static int get_##name (struct hotplug_slot *slot, type *value) \ | |
142 | { \ | |
143 | struct hotplug_slot_ops *ops = slot->ops; \ | |
144 | int retval = 0; \ | |
145 | if (try_module_get(ops->owner)) { \ | |
146 | if (ops->get_##name) \ | |
147 | retval = ops->get_##name (slot, value); \ | |
148 | else \ | |
149 | *value = slot->info->name; \ | |
150 | module_put(ops->owner); \ | |
151 | } \ | |
152 | return retval; \ | |
153 | } | |
154 | ||
155 | GET_STATUS(power_status, u8) | |
156 | GET_STATUS(attention_status, u8) | |
157 | GET_STATUS(latch_status, u8) | |
158 | GET_STATUS(adapter_status, u8) | |
159 | GET_STATUS(address, u32) | |
160 | GET_STATUS(max_bus_speed, enum pci_bus_speed) | |
161 | GET_STATUS(cur_bus_speed, enum pci_bus_speed) | |
162 | ||
163 | static ssize_t power_read_file (struct hotplug_slot *slot, char *buf) | |
164 | { | |
165 | int retval; | |
166 | u8 value; | |
167 | ||
168 | retval = get_power_status (slot, &value); | |
169 | if (retval) | |
170 | goto exit; | |
171 | retval = sprintf (buf, "%d\n", value); | |
172 | exit: | |
173 | return retval; | |
174 | } | |
175 | ||
176 | static ssize_t power_write_file (struct hotplug_slot *slot, const char *buf, | |
177 | size_t count) | |
178 | { | |
179 | unsigned long lpower; | |
180 | u8 power; | |
181 | int retval = 0; | |
182 | ||
183 | lpower = simple_strtoul (buf, NULL, 10); | |
184 | power = (u8)(lpower & 0xff); | |
185 | dbg ("power = %d\n", power); | |
186 | ||
187 | if (!try_module_get(slot->ops->owner)) { | |
188 | retval = -ENODEV; | |
189 | goto exit; | |
190 | } | |
191 | switch (power) { | |
192 | case 0: | |
193 | if (slot->ops->disable_slot) | |
194 | retval = slot->ops->disable_slot(slot); | |
195 | break; | |
196 | ||
197 | case 1: | |
198 | if (slot->ops->enable_slot) | |
199 | retval = slot->ops->enable_slot(slot); | |
200 | break; | |
201 | ||
202 | default: | |
203 | err ("Illegal value specified for power\n"); | |
204 | retval = -EINVAL; | |
205 | } | |
206 | module_put(slot->ops->owner); | |
207 | ||
208 | exit: | |
209 | if (retval) | |
210 | return retval; | |
211 | return count; | |
212 | } | |
213 | ||
214 | static struct hotplug_slot_attribute hotplug_slot_attr_power = { | |
215 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, | |
216 | .show = power_read_file, | |
217 | .store = power_write_file | |
218 | }; | |
219 | ||
220 | static ssize_t attention_read_file (struct hotplug_slot *slot, char *buf) | |
221 | { | |
222 | int retval; | |
223 | u8 value; | |
224 | ||
225 | retval = get_attention_status (slot, &value); | |
226 | if (retval) | |
227 | goto exit; | |
228 | retval = sprintf (buf, "%d\n", value); | |
229 | ||
230 | exit: | |
231 | return retval; | |
232 | } | |
233 | ||
234 | static ssize_t attention_write_file (struct hotplug_slot *slot, const char *buf, | |
235 | size_t count) | |
236 | { | |
237 | unsigned long lattention; | |
238 | u8 attention; | |
239 | int retval = 0; | |
240 | ||
241 | lattention = simple_strtoul (buf, NULL, 10); | |
242 | attention = (u8)(lattention & 0xff); | |
243 | dbg (" - attention = %d\n", attention); | |
244 | ||
245 | if (!try_module_get(slot->ops->owner)) { | |
246 | retval = -ENODEV; | |
247 | goto exit; | |
248 | } | |
249 | if (slot->ops->set_attention_status) | |
250 | retval = slot->ops->set_attention_status(slot, attention); | |
251 | module_put(slot->ops->owner); | |
252 | ||
253 | exit: | |
254 | if (retval) | |
255 | return retval; | |
256 | return count; | |
257 | } | |
258 | ||
259 | static struct hotplug_slot_attribute hotplug_slot_attr_attention = { | |
260 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, | |
261 | .show = attention_read_file, | |
262 | .store = attention_write_file | |
263 | }; | |
264 | ||
265 | static ssize_t latch_read_file (struct hotplug_slot *slot, char *buf) | |
266 | { | |
267 | int retval; | |
268 | u8 value; | |
269 | ||
270 | retval = get_latch_status (slot, &value); | |
271 | if (retval) | |
272 | goto exit; | |
273 | retval = sprintf (buf, "%d\n", value); | |
274 | ||
275 | exit: | |
276 | return retval; | |
277 | } | |
278 | ||
279 | static struct hotplug_slot_attribute hotplug_slot_attr_latch = { | |
280 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, | |
281 | .show = latch_read_file, | |
282 | }; | |
283 | ||
284 | static ssize_t presence_read_file (struct hotplug_slot *slot, char *buf) | |
285 | { | |
286 | int retval; | |
287 | u8 value; | |
288 | ||
289 | retval = get_adapter_status (slot, &value); | |
290 | if (retval) | |
291 | goto exit; | |
292 | retval = sprintf (buf, "%d\n", value); | |
293 | ||
294 | exit: | |
295 | return retval; | |
296 | } | |
297 | ||
298 | static struct hotplug_slot_attribute hotplug_slot_attr_presence = { | |
299 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, | |
300 | .show = presence_read_file, | |
301 | }; | |
302 | ||
303 | static ssize_t address_read_file (struct hotplug_slot *slot, char *buf) | |
304 | { | |
305 | int retval; | |
306 | u32 address; | |
307 | ||
308 | retval = get_address (slot, &address); | |
309 | if (retval) | |
310 | goto exit; | |
311 | retval = sprintf (buf, "%04x:%02x:%02x\n", | |
312 | (address >> 16) & 0xffff, | |
313 | (address >> 8) & 0xff, | |
314 | address & 0xff); | |
315 | ||
316 | exit: | |
317 | return retval; | |
318 | } | |
319 | ||
320 | static struct hotplug_slot_attribute hotplug_slot_attr_address = { | |
321 | .attr = {.name = "address", .mode = S_IFREG | S_IRUGO}, | |
322 | .show = address_read_file, | |
323 | }; | |
324 | ||
325 | static char *unknown_speed = "Unknown bus speed"; | |
326 | ||
327 | static ssize_t max_bus_speed_read_file (struct hotplug_slot *slot, char *buf) | |
328 | { | |
329 | char *speed_string; | |
330 | int retval; | |
331 | enum pci_bus_speed value; | |
332 | ||
333 | retval = get_max_bus_speed (slot, &value); | |
334 | if (retval) | |
335 | goto exit; | |
336 | ||
337 | if (value == PCI_SPEED_UNKNOWN) | |
338 | speed_string = unknown_speed; | |
339 | else | |
340 | speed_string = pci_bus_speed_strings[value]; | |
341 | ||
342 | retval = sprintf (buf, "%s\n", speed_string); | |
343 | ||
344 | exit: | |
345 | return retval; | |
346 | } | |
347 | ||
348 | static struct hotplug_slot_attribute hotplug_slot_attr_max_bus_speed = { | |
349 | .attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO}, | |
350 | .show = max_bus_speed_read_file, | |
351 | }; | |
352 | ||
353 | static ssize_t cur_bus_speed_read_file (struct hotplug_slot *slot, char *buf) | |
354 | { | |
355 | char *speed_string; | |
356 | int retval; | |
357 | enum pci_bus_speed value; | |
358 | ||
359 | retval = get_cur_bus_speed (slot, &value); | |
360 | if (retval) | |
361 | goto exit; | |
362 | ||
363 | if (value == PCI_SPEED_UNKNOWN) | |
364 | speed_string = unknown_speed; | |
365 | else | |
366 | speed_string = pci_bus_speed_strings[value]; | |
367 | ||
368 | retval = sprintf (buf, "%s\n", speed_string); | |
369 | ||
370 | exit: | |
371 | return retval; | |
372 | } | |
373 | ||
374 | static struct hotplug_slot_attribute hotplug_slot_attr_cur_bus_speed = { | |
375 | .attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO}, | |
376 | .show = cur_bus_speed_read_file, | |
377 | }; | |
378 | ||
379 | static ssize_t test_write_file (struct hotplug_slot *slot, const char *buf, | |
380 | size_t count) | |
381 | { | |
382 | unsigned long ltest; | |
383 | u32 test; | |
384 | int retval = 0; | |
385 | ||
386 | ltest = simple_strtoul (buf, NULL, 10); | |
387 | test = (u32)(ltest & 0xffffffff); | |
388 | dbg ("test = %d\n", test); | |
389 | ||
390 | if (!try_module_get(slot->ops->owner)) { | |
391 | retval = -ENODEV; | |
392 | goto exit; | |
393 | } | |
394 | if (slot->ops->hardware_test) | |
395 | retval = slot->ops->hardware_test(slot, test); | |
396 | module_put(slot->ops->owner); | |
397 | ||
398 | exit: | |
399 | if (retval) | |
400 | return retval; | |
401 | return count; | |
402 | } | |
403 | ||
404 | static struct hotplug_slot_attribute hotplug_slot_attr_test = { | |
405 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, | |
406 | .store = test_write_file | |
407 | }; | |
408 | ||
409 | static int has_power_file (struct hotplug_slot *slot) | |
410 | { | |
411 | if ((!slot) || (!slot->ops)) | |
412 | return -ENODEV; | |
413 | if ((slot->ops->enable_slot) || | |
414 | (slot->ops->disable_slot) || | |
415 | (slot->ops->get_power_status)) | |
416 | return 0; | |
417 | return -ENOENT; | |
418 | } | |
419 | ||
420 | static int has_attention_file (struct hotplug_slot *slot) | |
421 | { | |
422 | if ((!slot) || (!slot->ops)) | |
423 | return -ENODEV; | |
424 | if ((slot->ops->set_attention_status) || | |
425 | (slot->ops->get_attention_status)) | |
426 | return 0; | |
427 | return -ENOENT; | |
428 | } | |
429 | ||
430 | static int has_latch_file (struct hotplug_slot *slot) | |
431 | { | |
432 | if ((!slot) || (!slot->ops)) | |
433 | return -ENODEV; | |
434 | if (slot->ops->get_latch_status) | |
435 | return 0; | |
436 | return -ENOENT; | |
437 | } | |
438 | ||
439 | static int has_adapter_file (struct hotplug_slot *slot) | |
440 | { | |
441 | if ((!slot) || (!slot->ops)) | |
442 | return -ENODEV; | |
443 | if (slot->ops->get_adapter_status) | |
444 | return 0; | |
445 | return -ENOENT; | |
446 | } | |
447 | ||
448 | static int has_address_file (struct hotplug_slot *slot) | |
449 | { | |
450 | if ((!slot) || (!slot->ops)) | |
451 | return -ENODEV; | |
452 | if (slot->ops->get_address) | |
453 | return 0; | |
454 | return -ENOENT; | |
455 | } | |
456 | ||
457 | static int has_max_bus_speed_file (struct hotplug_slot *slot) | |
458 | { | |
459 | if ((!slot) || (!slot->ops)) | |
460 | return -ENODEV; | |
461 | if (slot->ops->get_max_bus_speed) | |
462 | return 0; | |
463 | return -ENOENT; | |
464 | } | |
465 | ||
466 | static int has_cur_bus_speed_file (struct hotplug_slot *slot) | |
467 | { | |
468 | if ((!slot) || (!slot->ops)) | |
469 | return -ENODEV; | |
470 | if (slot->ops->get_cur_bus_speed) | |
471 | return 0; | |
472 | return -ENOENT; | |
473 | } | |
474 | ||
475 | static int has_test_file (struct hotplug_slot *slot) | |
476 | { | |
477 | if ((!slot) || (!slot->ops)) | |
478 | return -ENODEV; | |
479 | if (slot->ops->hardware_test) | |
480 | return 0; | |
481 | return -ENOENT; | |
482 | } | |
483 | ||
484 | static int fs_add_slot (struct hotplug_slot *slot) | |
485 | { | |
486 | if (has_power_file(slot) == 0) | |
487 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
488 | ||
489 | if (has_attention_file(slot) == 0) | |
490 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
491 | ||
492 | if (has_latch_file(slot) == 0) | |
493 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
494 | ||
495 | if (has_adapter_file(slot) == 0) | |
496 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
497 | ||
498 | if (has_address_file(slot) == 0) | |
499 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_address.attr); | |
500 | ||
501 | if (has_max_bus_speed_file(slot) == 0) | |
502 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
503 | ||
504 | if (has_cur_bus_speed_file(slot) == 0) | |
505 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); | |
506 | ||
507 | if (has_test_file(slot) == 0) | |
508 | sysfs_create_file(&slot->kobj, &hotplug_slot_attr_test.attr); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static void fs_remove_slot (struct hotplug_slot *slot) | |
514 | { | |
515 | if (has_power_file(slot) == 0) | |
516 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
517 | ||
518 | if (has_attention_file(slot) == 0) | |
519 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
520 | ||
521 | if (has_latch_file(slot) == 0) | |
522 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
523 | ||
524 | if (has_adapter_file(slot) == 0) | |
525 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
526 | ||
527 | if (has_address_file(slot) == 0) | |
528 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_address.attr); | |
529 | ||
530 | if (has_max_bus_speed_file(slot) == 0) | |
531 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
532 | ||
533 | if (has_cur_bus_speed_file(slot) == 0) | |
534 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); | |
535 | ||
536 | if (has_test_file(slot) == 0) | |
537 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr); | |
538 | } | |
539 | ||
540 | static struct hotplug_slot *get_slot_from_name (const char *name) | |
541 | { | |
542 | struct hotplug_slot *slot; | |
543 | struct list_head *tmp; | |
544 | ||
545 | list_for_each (tmp, &pci_hotplug_slot_list) { | |
546 | slot = list_entry (tmp, struct hotplug_slot, slot_list); | |
547 | if (strcmp(slot->name, name) == 0) | |
548 | return slot; | |
549 | } | |
550 | return NULL; | |
551 | } | |
552 | ||
553 | /** | |
554 | * pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem | |
555 | * @slot: pointer to the &struct hotplug_slot to register | |
556 | * | |
557 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow | |
558 | * userspace interaction to the slot. | |
559 | * | |
560 | * Returns 0 if successful, anything else for an error. | |
561 | */ | |
562 | int pci_hp_register (struct hotplug_slot *slot) | |
563 | { | |
564 | int result; | |
565 | ||
566 | if (slot == NULL) | |
567 | return -ENODEV; | |
568 | if ((slot->info == NULL) || (slot->ops == NULL)) | |
569 | return -EINVAL; | |
570 | if (slot->release == NULL) { | |
571 | dbg("Why are you trying to register a hotplug slot" | |
572 | "without a proper release function?\n"); | |
573 | return -EINVAL; | |
574 | } | |
575 | ||
576 | kobject_set_name(&slot->kobj, "%s", slot->name); | |
577 | kobj_set_kset_s(slot, pci_hotplug_slots_subsys); | |
578 | ||
579 | /* this can fail if we have already registered a slot with the same name */ | |
580 | if (kobject_register(&slot->kobj)) { | |
581 | err("Unable to register kobject"); | |
582 | return -EINVAL; | |
583 | } | |
584 | ||
585 | list_add (&slot->slot_list, &pci_hotplug_slot_list); | |
586 | ||
587 | result = fs_add_slot (slot); | |
588 | dbg ("Added slot %s to the list\n", slot->name); | |
589 | return result; | |
590 | } | |
591 | ||
592 | /** | |
593 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem | |
594 | * @slot: pointer to the &struct hotplug_slot to deregister | |
595 | * | |
596 | * The @slot must have been registered with the pci hotplug subsystem | |
597 | * previously with a call to pci_hp_register(). | |
598 | * | |
599 | * Returns 0 if successful, anything else for an error. | |
600 | */ | |
601 | int pci_hp_deregister (struct hotplug_slot *slot) | |
602 | { | |
603 | struct hotplug_slot *temp; | |
604 | ||
605 | if (slot == NULL) | |
606 | return -ENODEV; | |
607 | ||
608 | temp = get_slot_from_name (slot->name); | |
609 | if (temp != slot) { | |
610 | return -ENODEV; | |
611 | } | |
612 | list_del (&slot->slot_list); | |
613 | ||
614 | fs_remove_slot (slot); | |
615 | dbg ("Removed slot %s from the list\n", slot->name); | |
616 | kobject_unregister(&slot->kobj); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | /** | |
621 | * pci_hp_change_slot_info - changes the slot's information structure in the core | |
622 | * @slot: pointer to the slot whose info has changed | |
623 | * @info: pointer to the info copy into the slot's info structure | |
624 | * | |
625 | * @slot must have been registered with the pci | |
626 | * hotplug subsystem previously with a call to pci_hp_register(). | |
627 | * | |
628 | * Returns 0 if successful, anything else for an error. | |
629 | */ | |
630 | int pci_hp_change_slot_info (struct hotplug_slot *slot, struct hotplug_slot_info *info) | |
631 | { | |
632 | if ((slot == NULL) || (info == NULL)) | |
633 | return -ENODEV; | |
634 | ||
635 | /* | |
636 | * check all fields in the info structure, and update timestamps | |
637 | * for the files referring to the fields that have now changed. | |
638 | */ | |
639 | if ((has_power_file(slot) == 0) && | |
640 | (slot->info->power_status != info->power_status)) | |
641 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
642 | ||
643 | if ((has_attention_file(slot) == 0) && | |
644 | (slot->info->attention_status != info->attention_status)) | |
645 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
646 | ||
647 | if ((has_latch_file(slot) == 0) && | |
648 | (slot->info->latch_status != info->latch_status)) | |
649 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
650 | ||
651 | if ((has_adapter_file(slot) == 0) && | |
652 | (slot->info->adapter_status != info->adapter_status)) | |
653 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
654 | ||
655 | if ((has_address_file(slot) == 0) && | |
656 | (slot->info->address != info->address)) | |
657 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_address.attr); | |
658 | ||
659 | if ((has_max_bus_speed_file(slot) == 0) && | |
660 | (slot->info->max_bus_speed != info->max_bus_speed)) | |
661 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
662 | ||
663 | if ((has_cur_bus_speed_file(slot) == 0) && | |
664 | (slot->info->cur_bus_speed != info->cur_bus_speed)) | |
665 | sysfs_update_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); | |
666 | ||
667 | memcpy (slot->info, info, sizeof (struct hotplug_slot_info)); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | static int __init pci_hotplug_init (void) | |
673 | { | |
674 | int result; | |
675 | ||
676 | kset_set_kset_s(&pci_hotplug_slots_subsys, pci_bus_type.subsys); | |
677 | result = subsystem_register(&pci_hotplug_slots_subsys); | |
678 | if (result) { | |
679 | err("Register subsys with error %d\n", result); | |
680 | goto exit; | |
681 | } | |
682 | result = cpci_hotplug_init(debug); | |
683 | if (result) { | |
684 | err ("cpci_hotplug_init with error %d\n", result); | |
685 | goto err_subsys; | |
686 | } | |
687 | ||
688 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
689 | goto exit; | |
690 | ||
691 | err_subsys: | |
692 | subsystem_unregister(&pci_hotplug_slots_subsys); | |
693 | exit: | |
694 | return result; | |
695 | } | |
696 | ||
697 | static void __exit pci_hotplug_exit (void) | |
698 | { | |
699 | cpci_hotplug_exit(); | |
700 | subsystem_unregister(&pci_hotplug_slots_subsys); | |
701 | } | |
702 | ||
703 | module_init(pci_hotplug_init); | |
704 | module_exit(pci_hotplug_exit); | |
705 | ||
706 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
707 | MODULE_DESCRIPTION(DRIVER_DESC); | |
708 | MODULE_LICENSE("GPL"); | |
709 | module_param(debug, bool, 0644); | |
710 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); | |
711 | ||
712 | EXPORT_SYMBOL_GPL(pci_hotplug_slots_subsys); | |
713 | EXPORT_SYMBOL_GPL(pci_hp_register); | |
714 | EXPORT_SYMBOL_GPL(pci_hp_deregister); | |
715 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |