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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 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/moduleparam.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/types.h> | |
34 | #include <linux/list.h> | |
35 | #include <linux/pagemap.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/smp_lock.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/mount.h> | |
40 | #include <linux/namei.h> | |
41 | #include <linux/pci.h> | |
42 | #include <asm/uaccess.h> | |
43 | #include <linux/kobject.h> | |
44 | #include <linux/sysfs.h> | |
45 | #include "pci_hotplug.h" | |
46 | ||
47 | ||
48 | #define MY_NAME "pci_hotplug" | |
49 | ||
50 | #define dbg(fmt, arg...) do { if (debug) printk(KERN_DEBUG "%s: %s: " fmt , MY_NAME , __FUNCTION__ , ## arg); } while (0) | |
51 | #define err(format, arg...) printk(KERN_ERR "%s: " format , MY_NAME , ## arg) | |
52 | #define info(format, arg...) printk(KERN_INFO "%s: " format , MY_NAME , ## arg) | |
53 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format , MY_NAME , ## arg) | |
54 | ||
55 | ||
56 | /* local variables */ | |
57 | static int debug; | |
58 | ||
59 | #define DRIVER_VERSION "0.5" | |
60 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Scott Murray <scottm@somanetworks.com>" | |
61 | #define DRIVER_DESC "PCI Hot Plug PCI Core" | |
62 | ||
63 | ||
64 | ////////////////////////////////////////////////////////////////// | |
65 | ||
66 | static LIST_HEAD(pci_hotplug_slot_list); | |
67 | ||
68 | struct subsystem pci_hotplug_slots_subsys; | |
69 | ||
70 | static ssize_t hotplug_slot_attr_show(struct kobject *kobj, | |
71 | struct attribute *attr, char *buf) | |
72 | { | |
73 | struct hotplug_slot *slot = to_hotplug_slot(kobj); | |
74 | struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr); | |
fc7e4828 | 75 | return attribute->show ? attribute->show(slot, buf) : -EIO; |
1da177e4 LT |
76 | } |
77 | ||
78 | static ssize_t hotplug_slot_attr_store(struct kobject *kobj, | |
79 | struct attribute *attr, const char *buf, size_t len) | |
80 | { | |
81 | struct hotplug_slot *slot = to_hotplug_slot(kobj); | |
82 | struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr); | |
fc7e4828 | 83 | return attribute->store ? attribute->store(slot, buf, len) : -EIO; |
1da177e4 LT |
84 | } |
85 | ||
86 | static struct sysfs_ops hotplug_slot_sysfs_ops = { | |
87 | .show = hotplug_slot_attr_show, | |
88 | .store = hotplug_slot_attr_store, | |
89 | }; | |
90 | ||
91 | static void hotplug_slot_release(struct kobject *kobj) | |
92 | { | |
93 | struct hotplug_slot *slot = to_hotplug_slot(kobj); | |
94 | if (slot->release) | |
95 | slot->release(slot); | |
96 | } | |
97 | ||
98 | static struct kobj_type hotplug_slot_ktype = { | |
99 | .sysfs_ops = &hotplug_slot_sysfs_ops, | |
100 | .release = &hotplug_slot_release, | |
101 | }; | |
102 | ||
103 | decl_subsys_name(pci_hotplug_slots, slots, &hotplug_slot_ktype, NULL); | |
104 | ||
105 | /* these strings match up with the values in pci_bus_speed */ | |
106 | static char *pci_bus_speed_strings[] = { | |
107 | "33 MHz PCI", /* 0x00 */ | |
108 | "66 MHz PCI", /* 0x01 */ | |
109 | "66 MHz PCIX", /* 0x02 */ | |
110 | "100 MHz PCIX", /* 0x03 */ | |
111 | "133 MHz PCIX", /* 0x04 */ | |
112 | NULL, /* 0x05 */ | |
113 | NULL, /* 0x06 */ | |
114 | NULL, /* 0x07 */ | |
115 | NULL, /* 0x08 */ | |
116 | "66 MHz PCIX 266", /* 0x09 */ | |
117 | "100 MHz PCIX 266", /* 0x0a */ | |
118 | "133 MHz PCIX 266", /* 0x0b */ | |
119 | NULL, /* 0x0c */ | |
120 | NULL, /* 0x0d */ | |
121 | NULL, /* 0x0e */ | |
122 | NULL, /* 0x0f */ | |
123 | NULL, /* 0x10 */ | |
124 | "66 MHz PCIX 533", /* 0x11 */ | |
125 | "100 MHz PCIX 533", /* 0x12 */ | |
126 | "133 MHz PCIX 533", /* 0x13 */ | |
127 | "25 GBps PCI-E", /* 0x14 */ | |
128 | }; | |
129 | ||
130 | #ifdef CONFIG_HOTPLUG_PCI_CPCI | |
131 | extern int cpci_hotplug_init(int debug); | |
132 | extern void cpci_hotplug_exit(void); | |
133 | #else | |
134 | static inline int cpci_hotplug_init(int debug) { return 0; } | |
135 | static inline void cpci_hotplug_exit(void) { } | |
136 | #endif | |
137 | ||
138 | /* Weee, fun with macros... */ | |
139 | #define GET_STATUS(name,type) \ | |
140 | static int get_##name (struct hotplug_slot *slot, type *value) \ | |
141 | { \ | |
142 | struct hotplug_slot_ops *ops = slot->ops; \ | |
143 | int retval = 0; \ | |
144 | if (try_module_get(ops->owner)) { \ | |
145 | if (ops->get_##name) \ | |
146 | retval = ops->get_##name (slot, value); \ | |
147 | else \ | |
148 | *value = slot->info->name; \ | |
149 | module_put(ops->owner); \ | |
150 | } \ | |
151 | return retval; \ | |
152 | } | |
153 | ||
154 | GET_STATUS(power_status, u8) | |
155 | GET_STATUS(attention_status, u8) | |
156 | GET_STATUS(latch_status, u8) | |
157 | GET_STATUS(adapter_status, u8) | |
158 | GET_STATUS(address, u32) | |
159 | GET_STATUS(max_bus_speed, enum pci_bus_speed) | |
160 | GET_STATUS(cur_bus_speed, enum pci_bus_speed) | |
161 | ||
162 | static ssize_t power_read_file (struct hotplug_slot *slot, char *buf) | |
163 | { | |
164 | int retval; | |
165 | u8 value; | |
166 | ||
167 | retval = get_power_status (slot, &value); | |
168 | if (retval) | |
169 | goto exit; | |
170 | retval = sprintf (buf, "%d\n", value); | |
171 | exit: | |
172 | return retval; | |
173 | } | |
174 | ||
175 | static ssize_t power_write_file (struct hotplug_slot *slot, const char *buf, | |
176 | size_t count) | |
177 | { | |
178 | unsigned long lpower; | |
179 | u8 power; | |
180 | int retval = 0; | |
181 | ||
182 | lpower = simple_strtoul (buf, NULL, 10); | |
183 | power = (u8)(lpower & 0xff); | |
184 | dbg ("power = %d\n", power); | |
185 | ||
186 | if (!try_module_get(slot->ops->owner)) { | |
187 | retval = -ENODEV; | |
188 | goto exit; | |
189 | } | |
190 | switch (power) { | |
191 | case 0: | |
192 | if (slot->ops->disable_slot) | |
193 | retval = slot->ops->disable_slot(slot); | |
194 | break; | |
195 | ||
196 | case 1: | |
197 | if (slot->ops->enable_slot) | |
198 | retval = slot->ops->enable_slot(slot); | |
199 | break; | |
200 | ||
201 | default: | |
202 | err ("Illegal value specified for power\n"); | |
203 | retval = -EINVAL; | |
204 | } | |
205 | module_put(slot->ops->owner); | |
206 | ||
207 | exit: | |
208 | if (retval) | |
209 | return retval; | |
210 | return count; | |
211 | } | |
212 | ||
213 | static struct hotplug_slot_attribute hotplug_slot_attr_power = { | |
214 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, | |
215 | .show = power_read_file, | |
216 | .store = power_write_file | |
217 | }; | |
218 | ||
219 | static ssize_t attention_read_file (struct hotplug_slot *slot, char *buf) | |
220 | { | |
221 | int retval; | |
222 | u8 value; | |
223 | ||
224 | retval = get_attention_status (slot, &value); | |
225 | if (retval) | |
226 | goto exit; | |
227 | retval = sprintf (buf, "%d\n", value); | |
228 | ||
229 | exit: | |
230 | return retval; | |
231 | } | |
232 | ||
233 | static ssize_t attention_write_file (struct hotplug_slot *slot, const char *buf, | |
234 | size_t count) | |
235 | { | |
236 | unsigned long lattention; | |
237 | u8 attention; | |
238 | int retval = 0; | |
239 | ||
240 | lattention = simple_strtoul (buf, NULL, 10); | |
241 | attention = (u8)(lattention & 0xff); | |
242 | dbg (" - attention = %d\n", attention); | |
243 | ||
244 | if (!try_module_get(slot->ops->owner)) { | |
245 | retval = -ENODEV; | |
246 | goto exit; | |
247 | } | |
248 | if (slot->ops->set_attention_status) | |
249 | retval = slot->ops->set_attention_status(slot, attention); | |
250 | module_put(slot->ops->owner); | |
251 | ||
252 | exit: | |
253 | if (retval) | |
254 | return retval; | |
255 | return count; | |
256 | } | |
257 | ||
258 | static struct hotplug_slot_attribute hotplug_slot_attr_attention = { | |
259 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, | |
260 | .show = attention_read_file, | |
261 | .store = attention_write_file | |
262 | }; | |
263 | ||
264 | static ssize_t latch_read_file (struct hotplug_slot *slot, char *buf) | |
265 | { | |
266 | int retval; | |
267 | u8 value; | |
268 | ||
269 | retval = get_latch_status (slot, &value); | |
270 | if (retval) | |
271 | goto exit; | |
272 | retval = sprintf (buf, "%d\n", value); | |
273 | ||
274 | exit: | |
275 | return retval; | |
276 | } | |
277 | ||
278 | static struct hotplug_slot_attribute hotplug_slot_attr_latch = { | |
279 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, | |
280 | .show = latch_read_file, | |
281 | }; | |
282 | ||
283 | static ssize_t presence_read_file (struct hotplug_slot *slot, char *buf) | |
284 | { | |
285 | int retval; | |
286 | u8 value; | |
287 | ||
288 | retval = get_adapter_status (slot, &value); | |
289 | if (retval) | |
290 | goto exit; | |
291 | retval = sprintf (buf, "%d\n", value); | |
292 | ||
293 | exit: | |
294 | return retval; | |
295 | } | |
296 | ||
297 | static struct hotplug_slot_attribute hotplug_slot_attr_presence = { | |
298 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, | |
299 | .show = presence_read_file, | |
300 | }; | |
301 | ||
302 | static ssize_t address_read_file (struct hotplug_slot *slot, char *buf) | |
303 | { | |
304 | int retval; | |
305 | u32 address; | |
306 | ||
307 | retval = get_address (slot, &address); | |
308 | if (retval) | |
309 | goto exit; | |
310 | retval = sprintf (buf, "%04x:%02x:%02x\n", | |
311 | (address >> 16) & 0xffff, | |
312 | (address >> 8) & 0xff, | |
313 | address & 0xff); | |
314 | ||
315 | exit: | |
316 | return retval; | |
317 | } | |
318 | ||
319 | static struct hotplug_slot_attribute hotplug_slot_attr_address = { | |
320 | .attr = {.name = "address", .mode = S_IFREG | S_IRUGO}, | |
321 | .show = address_read_file, | |
322 | }; | |
323 | ||
324 | static char *unknown_speed = "Unknown bus speed"; | |
325 | ||
326 | static ssize_t max_bus_speed_read_file (struct hotplug_slot *slot, char *buf) | |
327 | { | |
328 | char *speed_string; | |
329 | int retval; | |
330 | enum pci_bus_speed value; | |
331 | ||
332 | retval = get_max_bus_speed (slot, &value); | |
333 | if (retval) | |
334 | goto exit; | |
335 | ||
336 | if (value == PCI_SPEED_UNKNOWN) | |
337 | speed_string = unknown_speed; | |
338 | else | |
339 | speed_string = pci_bus_speed_strings[value]; | |
340 | ||
341 | retval = sprintf (buf, "%s\n", speed_string); | |
342 | ||
343 | exit: | |
344 | return retval; | |
345 | } | |
346 | ||
347 | static struct hotplug_slot_attribute hotplug_slot_attr_max_bus_speed = { | |
348 | .attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO}, | |
349 | .show = max_bus_speed_read_file, | |
350 | }; | |
351 | ||
352 | static ssize_t cur_bus_speed_read_file (struct hotplug_slot *slot, char *buf) | |
353 | { | |
354 | char *speed_string; | |
355 | int retval; | |
356 | enum pci_bus_speed value; | |
357 | ||
358 | retval = get_cur_bus_speed (slot, &value); | |
359 | if (retval) | |
360 | goto exit; | |
361 | ||
362 | if (value == PCI_SPEED_UNKNOWN) | |
363 | speed_string = unknown_speed; | |
364 | else | |
365 | speed_string = pci_bus_speed_strings[value]; | |
366 | ||
367 | retval = sprintf (buf, "%s\n", speed_string); | |
368 | ||
369 | exit: | |
370 | return retval; | |
371 | } | |
372 | ||
373 | static struct hotplug_slot_attribute hotplug_slot_attr_cur_bus_speed = { | |
374 | .attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO}, | |
375 | .show = cur_bus_speed_read_file, | |
376 | }; | |
377 | ||
378 | static ssize_t test_write_file (struct hotplug_slot *slot, const char *buf, | |
379 | size_t count) | |
380 | { | |
381 | unsigned long ltest; | |
382 | u32 test; | |
383 | int retval = 0; | |
384 | ||
385 | ltest = simple_strtoul (buf, NULL, 10); | |
386 | test = (u32)(ltest & 0xffffffff); | |
387 | dbg ("test = %d\n", test); | |
388 | ||
389 | if (!try_module_get(slot->ops->owner)) { | |
390 | retval = -ENODEV; | |
391 | goto exit; | |
392 | } | |
393 | if (slot->ops->hardware_test) | |
394 | retval = slot->ops->hardware_test(slot, test); | |
395 | module_put(slot->ops->owner); | |
396 | ||
397 | exit: | |
398 | if (retval) | |
399 | return retval; | |
400 | return count; | |
401 | } | |
402 | ||
403 | static struct hotplug_slot_attribute hotplug_slot_attr_test = { | |
404 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, | |
405 | .store = test_write_file | |
406 | }; | |
407 | ||
408 | static int has_power_file (struct hotplug_slot *slot) | |
409 | { | |
410 | if ((!slot) || (!slot->ops)) | |
411 | return -ENODEV; | |
412 | if ((slot->ops->enable_slot) || | |
413 | (slot->ops->disable_slot) || | |
414 | (slot->ops->get_power_status)) | |
415 | return 0; | |
416 | return -ENOENT; | |
417 | } | |
418 | ||
419 | static int has_attention_file (struct hotplug_slot *slot) | |
420 | { | |
421 | if ((!slot) || (!slot->ops)) | |
422 | return -ENODEV; | |
423 | if ((slot->ops->set_attention_status) || | |
424 | (slot->ops->get_attention_status)) | |
425 | return 0; | |
426 | return -ENOENT; | |
427 | } | |
428 | ||
429 | static int has_latch_file (struct hotplug_slot *slot) | |
430 | { | |
431 | if ((!slot) || (!slot->ops)) | |
432 | return -ENODEV; | |
433 | if (slot->ops->get_latch_status) | |
434 | return 0; | |
435 | return -ENOENT; | |
436 | } | |
437 | ||
438 | static int has_adapter_file (struct hotplug_slot *slot) | |
439 | { | |
440 | if ((!slot) || (!slot->ops)) | |
441 | return -ENODEV; | |
442 | if (slot->ops->get_adapter_status) | |
443 | return 0; | |
444 | return -ENOENT; | |
445 | } | |
446 | ||
447 | static int has_address_file (struct hotplug_slot *slot) | |
448 | { | |
449 | if ((!slot) || (!slot->ops)) | |
450 | return -ENODEV; | |
451 | if (slot->ops->get_address) | |
452 | return 0; | |
453 | return -ENOENT; | |
454 | } | |
455 | ||
456 | static int has_max_bus_speed_file (struct hotplug_slot *slot) | |
457 | { | |
458 | if ((!slot) || (!slot->ops)) | |
459 | return -ENODEV; | |
460 | if (slot->ops->get_max_bus_speed) | |
461 | return 0; | |
462 | return -ENOENT; | |
463 | } | |
464 | ||
465 | static int has_cur_bus_speed_file (struct hotplug_slot *slot) | |
466 | { | |
467 | if ((!slot) || (!slot->ops)) | |
468 | return -ENODEV; | |
469 | if (slot->ops->get_cur_bus_speed) | |
470 | return 0; | |
471 | return -ENOENT; | |
472 | } | |
473 | ||
474 | static int has_test_file (struct hotplug_slot *slot) | |
475 | { | |
476 | if ((!slot) || (!slot->ops)) | |
477 | return -ENODEV; | |
478 | if (slot->ops->hardware_test) | |
479 | return 0; | |
480 | return -ENOENT; | |
481 | } | |
482 | ||
483 | static int fs_add_slot (struct hotplug_slot *slot) | |
484 | { | |
660a0e8f | 485 | int retval = 0; |
1da177e4 | 486 | |
660a0e8f GKH |
487 | if (has_power_file(slot) == 0) { |
488 | retval = sysfs_create_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
489 | if (retval) | |
490 | goto exit_power; | |
491 | } | |
1da177e4 | 492 | |
660a0e8f GKH |
493 | if (has_attention_file(slot) == 0) { |
494 | retval = sysfs_create_file(&slot->kobj, | |
495 | &hotplug_slot_attr_attention.attr); | |
496 | if (retval) | |
497 | goto exit_attention; | |
498 | } | |
1da177e4 | 499 | |
660a0e8f GKH |
500 | if (has_latch_file(slot) == 0) { |
501 | retval = sysfs_create_file(&slot->kobj, | |
502 | &hotplug_slot_attr_latch.attr); | |
503 | if (retval) | |
504 | goto exit_latch; | |
505 | } | |
1da177e4 | 506 | |
660a0e8f GKH |
507 | if (has_adapter_file(slot) == 0) { |
508 | retval = sysfs_create_file(&slot->kobj, | |
509 | &hotplug_slot_attr_presence.attr); | |
510 | if (retval) | |
511 | goto exit_adapter; | |
512 | } | |
1da177e4 | 513 | |
660a0e8f GKH |
514 | if (has_address_file(slot) == 0) { |
515 | retval = sysfs_create_file(&slot->kobj, | |
516 | &hotplug_slot_attr_address.attr); | |
517 | if (retval) | |
518 | goto exit_address; | |
519 | } | |
1da177e4 | 520 | |
660a0e8f GKH |
521 | if (has_max_bus_speed_file(slot) == 0) { |
522 | retval = sysfs_create_file(&slot->kobj, | |
523 | &hotplug_slot_attr_max_bus_speed.attr); | |
524 | if (retval) | |
525 | goto exit_max_speed; | |
526 | } | |
527 | ||
528 | if (has_cur_bus_speed_file(slot) == 0) { | |
529 | retval = sysfs_create_file(&slot->kobj, | |
530 | &hotplug_slot_attr_cur_bus_speed.attr); | |
531 | if (retval) | |
532 | goto exit_cur_speed; | |
533 | } | |
534 | ||
535 | if (has_test_file(slot) == 0) { | |
536 | retval = sysfs_create_file(&slot->kobj, | |
537 | &hotplug_slot_attr_test.attr); | |
538 | if (retval) | |
539 | goto exit_test; | |
540 | } | |
541 | ||
542 | goto exit; | |
543 | ||
544 | exit_test: | |
1da177e4 | 545 | if (has_cur_bus_speed_file(slot) == 0) |
660a0e8f | 546 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); |
1da177e4 | 547 | |
660a0e8f GKH |
548 | exit_cur_speed: |
549 | if (has_max_bus_speed_file(slot) == 0) | |
550 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
1da177e4 | 551 | |
660a0e8f GKH |
552 | exit_max_speed: |
553 | if (has_address_file(slot) == 0) | |
554 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_address.attr); | |
555 | ||
556 | exit_address: | |
557 | if (has_adapter_file(slot) == 0) | |
558 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
559 | ||
560 | exit_adapter: | |
561 | if (has_latch_file(slot) == 0) | |
562 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
563 | ||
564 | exit_latch: | |
565 | if (has_attention_file(slot) == 0) | |
566 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
567 | ||
568 | exit_attention: | |
569 | if (has_power_file(slot) == 0) | |
570 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
571 | exit_power: | |
572 | exit: | |
573 | return retval; | |
1da177e4 LT |
574 | } |
575 | ||
576 | static void fs_remove_slot (struct hotplug_slot *slot) | |
577 | { | |
578 | if (has_power_file(slot) == 0) | |
579 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
580 | ||
581 | if (has_attention_file(slot) == 0) | |
582 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
583 | ||
584 | if (has_latch_file(slot) == 0) | |
585 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
586 | ||
587 | if (has_adapter_file(slot) == 0) | |
588 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
589 | ||
590 | if (has_address_file(slot) == 0) | |
591 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_address.attr); | |
592 | ||
593 | if (has_max_bus_speed_file(slot) == 0) | |
594 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
595 | ||
596 | if (has_cur_bus_speed_file(slot) == 0) | |
597 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); | |
598 | ||
599 | if (has_test_file(slot) == 0) | |
600 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr); | |
601 | } | |
602 | ||
603 | static struct hotplug_slot *get_slot_from_name (const char *name) | |
604 | { | |
605 | struct hotplug_slot *slot; | |
606 | struct list_head *tmp; | |
607 | ||
608 | list_for_each (tmp, &pci_hotplug_slot_list) { | |
609 | slot = list_entry (tmp, struct hotplug_slot, slot_list); | |
610 | if (strcmp(slot->name, name) == 0) | |
611 | return slot; | |
612 | } | |
613 | return NULL; | |
614 | } | |
615 | ||
616 | /** | |
617 | * pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem | |
618 | * @slot: pointer to the &struct hotplug_slot to register | |
619 | * | |
620 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow | |
621 | * userspace interaction to the slot. | |
622 | * | |
623 | * Returns 0 if successful, anything else for an error. | |
624 | */ | |
625 | int pci_hp_register (struct hotplug_slot *slot) | |
626 | { | |
627 | int result; | |
628 | ||
629 | if (slot == NULL) | |
630 | return -ENODEV; | |
631 | if ((slot->info == NULL) || (slot->ops == NULL)) | |
632 | return -EINVAL; | |
633 | if (slot->release == NULL) { | |
634 | dbg("Why are you trying to register a hotplug slot" | |
635 | "without a proper release function?\n"); | |
636 | return -EINVAL; | |
637 | } | |
638 | ||
639 | kobject_set_name(&slot->kobj, "%s", slot->name); | |
640 | kobj_set_kset_s(slot, pci_hotplug_slots_subsys); | |
641 | ||
642 | /* this can fail if we have already registered a slot with the same name */ | |
643 | if (kobject_register(&slot->kobj)) { | |
644 | err("Unable to register kobject"); | |
645 | return -EINVAL; | |
646 | } | |
647 | ||
648 | list_add (&slot->slot_list, &pci_hotplug_slot_list); | |
649 | ||
650 | result = fs_add_slot (slot); | |
651 | dbg ("Added slot %s to the list\n", slot->name); | |
652 | return result; | |
653 | } | |
654 | ||
655 | /** | |
656 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem | |
657 | * @slot: pointer to the &struct hotplug_slot to deregister | |
658 | * | |
659 | * The @slot must have been registered with the pci hotplug subsystem | |
660 | * previously with a call to pci_hp_register(). | |
661 | * | |
662 | * Returns 0 if successful, anything else for an error. | |
663 | */ | |
664 | int pci_hp_deregister (struct hotplug_slot *slot) | |
665 | { | |
666 | struct hotplug_slot *temp; | |
667 | ||
668 | if (slot == NULL) | |
669 | return -ENODEV; | |
670 | ||
671 | temp = get_slot_from_name (slot->name); | |
672 | if (temp != slot) { | |
673 | return -ENODEV; | |
674 | } | |
675 | list_del (&slot->slot_list); | |
676 | ||
677 | fs_remove_slot (slot); | |
678 | dbg ("Removed slot %s from the list\n", slot->name); | |
679 | kobject_unregister(&slot->kobj); | |
680 | return 0; | |
681 | } | |
682 | ||
683 | /** | |
684 | * pci_hp_change_slot_info - changes the slot's information structure in the core | |
685 | * @slot: pointer to the slot whose info has changed | |
686 | * @info: pointer to the info copy into the slot's info structure | |
687 | * | |
688 | * @slot must have been registered with the pci | |
689 | * hotplug subsystem previously with a call to pci_hp_register(). | |
690 | * | |
691 | * Returns 0 if successful, anything else for an error. | |
692 | */ | |
660a0e8f GKH |
693 | int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot, |
694 | struct hotplug_slot_info *info) | |
1da177e4 | 695 | { |
660a0e8f GKH |
696 | int retval; |
697 | ||
1da177e4 LT |
698 | if ((slot == NULL) || (info == NULL)) |
699 | return -ENODEV; | |
700 | ||
701 | /* | |
702 | * check all fields in the info structure, and update timestamps | |
703 | * for the files referring to the fields that have now changed. | |
704 | */ | |
705 | if ((has_power_file(slot) == 0) && | |
660a0e8f GKH |
706 | (slot->info->power_status != info->power_status)) { |
707 | retval = sysfs_update_file(&slot->kobj, | |
708 | &hotplug_slot_attr_power.attr); | |
709 | if (retval) | |
710 | return retval; | |
711 | } | |
1da177e4 LT |
712 | |
713 | if ((has_attention_file(slot) == 0) && | |
660a0e8f GKH |
714 | (slot->info->attention_status != info->attention_status)) { |
715 | retval = sysfs_update_file(&slot->kobj, | |
716 | &hotplug_slot_attr_attention.attr); | |
717 | if (retval) | |
718 | return retval; | |
719 | } | |
1da177e4 LT |
720 | |
721 | if ((has_latch_file(slot) == 0) && | |
660a0e8f GKH |
722 | (slot->info->latch_status != info->latch_status)) { |
723 | retval = sysfs_update_file(&slot->kobj, | |
724 | &hotplug_slot_attr_latch.attr); | |
725 | if (retval) | |
726 | return retval; | |
727 | } | |
1da177e4 LT |
728 | |
729 | if ((has_adapter_file(slot) == 0) && | |
660a0e8f GKH |
730 | (slot->info->adapter_status != info->adapter_status)) { |
731 | retval = sysfs_update_file(&slot->kobj, | |
732 | &hotplug_slot_attr_presence.attr); | |
733 | if (retval) | |
734 | return retval; | |
735 | } | |
1da177e4 LT |
736 | |
737 | if ((has_address_file(slot) == 0) && | |
660a0e8f GKH |
738 | (slot->info->address != info->address)) { |
739 | retval = sysfs_update_file(&slot->kobj, | |
740 | &hotplug_slot_attr_address.attr); | |
741 | if (retval) | |
742 | return retval; | |
743 | } | |
1da177e4 LT |
744 | |
745 | if ((has_max_bus_speed_file(slot) == 0) && | |
660a0e8f GKH |
746 | (slot->info->max_bus_speed != info->max_bus_speed)) { |
747 | retval = sysfs_update_file(&slot->kobj, | |
748 | &hotplug_slot_attr_max_bus_speed.attr); | |
749 | if (retval) | |
750 | return retval; | |
751 | } | |
1da177e4 LT |
752 | |
753 | if ((has_cur_bus_speed_file(slot) == 0) && | |
660a0e8f GKH |
754 | (slot->info->cur_bus_speed != info->cur_bus_speed)) { |
755 | retval = sysfs_update_file(&slot->kobj, | |
756 | &hotplug_slot_attr_cur_bus_speed.attr); | |
757 | if (retval) | |
758 | return retval; | |
759 | } | |
1da177e4 LT |
760 | |
761 | memcpy (slot->info, info, sizeof (struct hotplug_slot_info)); | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | static int __init pci_hotplug_init (void) | |
767 | { | |
768 | int result; | |
769 | ||
770 | kset_set_kset_s(&pci_hotplug_slots_subsys, pci_bus_type.subsys); | |
771 | result = subsystem_register(&pci_hotplug_slots_subsys); | |
772 | if (result) { | |
773 | err("Register subsys with error %d\n", result); | |
774 | goto exit; | |
775 | } | |
776 | result = cpci_hotplug_init(debug); | |
777 | if (result) { | |
778 | err ("cpci_hotplug_init with error %d\n", result); | |
779 | goto err_subsys; | |
780 | } | |
781 | ||
782 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
783 | goto exit; | |
784 | ||
785 | err_subsys: | |
786 | subsystem_unregister(&pci_hotplug_slots_subsys); | |
787 | exit: | |
788 | return result; | |
789 | } | |
790 | ||
791 | static void __exit pci_hotplug_exit (void) | |
792 | { | |
793 | cpci_hotplug_exit(); | |
794 | subsystem_unregister(&pci_hotplug_slots_subsys); | |
795 | } | |
796 | ||
797 | module_init(pci_hotplug_init); | |
798 | module_exit(pci_hotplug_exit); | |
799 | ||
800 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
801 | MODULE_DESCRIPTION(DRIVER_DESC); | |
802 | MODULE_LICENSE("GPL"); | |
803 | module_param(debug, bool, 0644); | |
804 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); | |
805 | ||
806 | EXPORT_SYMBOL_GPL(pci_hotplug_slots_subsys); | |
807 | EXPORT_SYMBOL_GPL(pci_hp_register); | |
808 | EXPORT_SYMBOL_GPL(pci_hp_deregister); | |
809 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |