Commit | Line | Data |
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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 | * | |
fb5f4d7a | 24 | * Send feedback to <kristen.c.accardi@intel.com> |
1da177e4 LT |
25 | * |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/moduleparam.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/list.h> | |
7a54f25c GKH |
33 | #include <linux/kobject.h> |
34 | #include <linux/sysfs.h> | |
1da177e4 LT |
35 | #include <linux/pagemap.h> |
36 | #include <linux/slab.h> | |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/mount.h> | |
39 | #include <linux/namei.h> | |
95cb9093 | 40 | #include <linux/mutex.h> |
1da177e4 | 41 | #include <linux/pci.h> |
7a54f25c | 42 | #include <linux/pci_hotplug.h> |
1da177e4 | 43 | #include <asm/uaccess.h> |
f46753c5 | 44 | #include "../pci.h" |
1da177e4 LT |
45 | |
46 | #define MY_NAME "pci_hotplug" | |
47 | ||
66bef8c0 | 48 | #define dbg(fmt, arg...) do { if (debug) printk(KERN_DEBUG "%s: %s: " fmt , MY_NAME , __func__ , ## arg); } while (0) |
1da177e4 LT |
49 | #define err(format, arg...) printk(KERN_ERR "%s: " format , MY_NAME , ## arg) |
50 | #define info(format, arg...) printk(KERN_INFO "%s: " format , MY_NAME , ## arg) | |
51 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format , MY_NAME , ## arg) | |
52 | ||
53 | ||
54 | /* local variables */ | |
55 | static int debug; | |
56 | ||
57 | #define DRIVER_VERSION "0.5" | |
58 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Scott Murray <scottm@somanetworks.com>" | |
59 | #define DRIVER_DESC "PCI Hot Plug PCI Core" | |
60 | ||
61 | ||
62 | ////////////////////////////////////////////////////////////////// | |
63 | ||
64 | static LIST_HEAD(pci_hotplug_slot_list); | |
95cb9093 | 65 | static DEFINE_MUTEX(pci_hp_mutex); |
1da177e4 | 66 | |
1da177e4 LT |
67 | /* these strings match up with the values in pci_bus_speed */ |
68 | static char *pci_bus_speed_strings[] = { | |
69 | "33 MHz PCI", /* 0x00 */ | |
70 | "66 MHz PCI", /* 0x01 */ | |
71 | "66 MHz PCIX", /* 0x02 */ | |
72 | "100 MHz PCIX", /* 0x03 */ | |
73 | "133 MHz PCIX", /* 0x04 */ | |
74 | NULL, /* 0x05 */ | |
75 | NULL, /* 0x06 */ | |
76 | NULL, /* 0x07 */ | |
77 | NULL, /* 0x08 */ | |
78 | "66 MHz PCIX 266", /* 0x09 */ | |
79 | "100 MHz PCIX 266", /* 0x0a */ | |
80 | "133 MHz PCIX 266", /* 0x0b */ | |
81 | NULL, /* 0x0c */ | |
82 | NULL, /* 0x0d */ | |
83 | NULL, /* 0x0e */ | |
84 | NULL, /* 0x0f */ | |
85 | NULL, /* 0x10 */ | |
86 | "66 MHz PCIX 533", /* 0x11 */ | |
87 | "100 MHz PCIX 533", /* 0x12 */ | |
88 | "133 MHz PCIX 533", /* 0x13 */ | |
89 | "25 GBps PCI-E", /* 0x14 */ | |
90 | }; | |
91 | ||
92 | #ifdef CONFIG_HOTPLUG_PCI_CPCI | |
93 | extern int cpci_hotplug_init(int debug); | |
94 | extern void cpci_hotplug_exit(void); | |
95 | #else | |
96 | static inline int cpci_hotplug_init(int debug) { return 0; } | |
97 | static inline void cpci_hotplug_exit(void) { } | |
98 | #endif | |
99 | ||
100 | /* Weee, fun with macros... */ | |
101 | #define GET_STATUS(name,type) \ | |
102 | static int get_##name (struct hotplug_slot *slot, type *value) \ | |
103 | { \ | |
104 | struct hotplug_slot_ops *ops = slot->ops; \ | |
105 | int retval = 0; \ | |
bd1d9855 | 106 | if (!try_module_get(ops->owner)) \ |
c8761fe8 ZY |
107 | return -ENODEV; \ |
108 | if (ops->get_##name) \ | |
109 | retval = ops->get_##name(slot, value); \ | |
110 | else \ | |
111 | *value = slot->info->name; \ | |
112 | module_put(ops->owner); \ | |
1da177e4 LT |
113 | return retval; \ |
114 | } | |
115 | ||
116 | GET_STATUS(power_status, u8) | |
117 | GET_STATUS(attention_status, u8) | |
118 | GET_STATUS(latch_status, u8) | |
119 | GET_STATUS(adapter_status, u8) | |
1da177e4 LT |
120 | GET_STATUS(max_bus_speed, enum pci_bus_speed) |
121 | GET_STATUS(cur_bus_speed, enum pci_bus_speed) | |
122 | ||
f46753c5 | 123 | static ssize_t power_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
124 | { |
125 | int retval; | |
126 | u8 value; | |
127 | ||
f46753c5 | 128 | retval = get_power_status(slot->hotplug, &value); |
1da177e4 LT |
129 | if (retval) |
130 | goto exit; | |
131 | retval = sprintf (buf, "%d\n", value); | |
132 | exit: | |
133 | return retval; | |
134 | } | |
135 | ||
f46753c5 | 136 | static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf, |
1da177e4 LT |
137 | size_t count) |
138 | { | |
f46753c5 | 139 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
140 | unsigned long lpower; |
141 | u8 power; | |
142 | int retval = 0; | |
143 | ||
144 | lpower = simple_strtoul (buf, NULL, 10); | |
145 | power = (u8)(lpower & 0xff); | |
146 | dbg ("power = %d\n", power); | |
147 | ||
148 | if (!try_module_get(slot->ops->owner)) { | |
149 | retval = -ENODEV; | |
150 | goto exit; | |
151 | } | |
152 | switch (power) { | |
153 | case 0: | |
154 | if (slot->ops->disable_slot) | |
155 | retval = slot->ops->disable_slot(slot); | |
156 | break; | |
157 | ||
158 | case 1: | |
159 | if (slot->ops->enable_slot) | |
160 | retval = slot->ops->enable_slot(slot); | |
161 | break; | |
162 | ||
163 | default: | |
164 | err ("Illegal value specified for power\n"); | |
165 | retval = -EINVAL; | |
166 | } | |
167 | module_put(slot->ops->owner); | |
168 | ||
169 | exit: | |
170 | if (retval) | |
171 | return retval; | |
172 | return count; | |
173 | } | |
174 | ||
f46753c5 | 175 | static struct pci_slot_attribute hotplug_slot_attr_power = { |
1da177e4 LT |
176 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
177 | .show = power_read_file, | |
178 | .store = power_write_file | |
179 | }; | |
180 | ||
f46753c5 | 181 | static ssize_t attention_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
182 | { |
183 | int retval; | |
184 | u8 value; | |
185 | ||
f46753c5 | 186 | retval = get_attention_status(slot->hotplug, &value); |
1da177e4 LT |
187 | if (retval) |
188 | goto exit; | |
f46753c5 | 189 | retval = sprintf(buf, "%d\n", value); |
1da177e4 LT |
190 | |
191 | exit: | |
192 | return retval; | |
193 | } | |
194 | ||
f46753c5 | 195 | static ssize_t attention_write_file(struct pci_slot *slot, const char *buf, |
1da177e4 LT |
196 | size_t count) |
197 | { | |
f46753c5 | 198 | struct hotplug_slot_ops *ops = slot->hotplug->ops; |
1da177e4 LT |
199 | unsigned long lattention; |
200 | u8 attention; | |
201 | int retval = 0; | |
202 | ||
203 | lattention = simple_strtoul (buf, NULL, 10); | |
204 | attention = (u8)(lattention & 0xff); | |
205 | dbg (" - attention = %d\n", attention); | |
206 | ||
f46753c5 | 207 | if (!try_module_get(ops->owner)) { |
1da177e4 LT |
208 | retval = -ENODEV; |
209 | goto exit; | |
210 | } | |
f46753c5 AC |
211 | if (ops->set_attention_status) |
212 | retval = ops->set_attention_status(slot->hotplug, attention); | |
213 | module_put(ops->owner); | |
1da177e4 LT |
214 | |
215 | exit: | |
216 | if (retval) | |
217 | return retval; | |
218 | return count; | |
219 | } | |
220 | ||
f46753c5 | 221 | static struct pci_slot_attribute hotplug_slot_attr_attention = { |
1da177e4 LT |
222 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
223 | .show = attention_read_file, | |
224 | .store = attention_write_file | |
225 | }; | |
226 | ||
f46753c5 | 227 | static ssize_t latch_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
228 | { |
229 | int retval; | |
230 | u8 value; | |
231 | ||
f46753c5 | 232 | retval = get_latch_status(slot->hotplug, &value); |
1da177e4 LT |
233 | if (retval) |
234 | goto exit; | |
235 | retval = sprintf (buf, "%d\n", value); | |
236 | ||
237 | exit: | |
238 | return retval; | |
239 | } | |
240 | ||
f46753c5 | 241 | static struct pci_slot_attribute hotplug_slot_attr_latch = { |
1da177e4 LT |
242 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, |
243 | .show = latch_read_file, | |
244 | }; | |
245 | ||
f46753c5 | 246 | static ssize_t presence_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
247 | { |
248 | int retval; | |
249 | u8 value; | |
250 | ||
f46753c5 | 251 | retval = get_adapter_status(slot->hotplug, &value); |
1da177e4 LT |
252 | if (retval) |
253 | goto exit; | |
254 | retval = sprintf (buf, "%d\n", value); | |
255 | ||
256 | exit: | |
257 | return retval; | |
258 | } | |
259 | ||
f46753c5 | 260 | static struct pci_slot_attribute hotplug_slot_attr_presence = { |
1da177e4 LT |
261 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, |
262 | .show = presence_read_file, | |
263 | }; | |
264 | ||
1da177e4 LT |
265 | static char *unknown_speed = "Unknown bus speed"; |
266 | ||
f46753c5 | 267 | static ssize_t max_bus_speed_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
268 | { |
269 | char *speed_string; | |
270 | int retval; | |
271 | enum pci_bus_speed value; | |
272 | ||
f46753c5 | 273 | retval = get_max_bus_speed(slot->hotplug, &value); |
1da177e4 LT |
274 | if (retval) |
275 | goto exit; | |
276 | ||
277 | if (value == PCI_SPEED_UNKNOWN) | |
278 | speed_string = unknown_speed; | |
279 | else | |
280 | speed_string = pci_bus_speed_strings[value]; | |
281 | ||
282 | retval = sprintf (buf, "%s\n", speed_string); | |
283 | ||
284 | exit: | |
285 | return retval; | |
286 | } | |
287 | ||
f46753c5 | 288 | static struct pci_slot_attribute hotplug_slot_attr_max_bus_speed = { |
1da177e4 LT |
289 | .attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO}, |
290 | .show = max_bus_speed_read_file, | |
291 | }; | |
292 | ||
f46753c5 | 293 | static ssize_t cur_bus_speed_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
294 | { |
295 | char *speed_string; | |
296 | int retval; | |
297 | enum pci_bus_speed value; | |
298 | ||
f46753c5 | 299 | retval = get_cur_bus_speed(slot->hotplug, &value); |
1da177e4 LT |
300 | if (retval) |
301 | goto exit; | |
302 | ||
303 | if (value == PCI_SPEED_UNKNOWN) | |
304 | speed_string = unknown_speed; | |
305 | else | |
306 | speed_string = pci_bus_speed_strings[value]; | |
307 | ||
308 | retval = sprintf (buf, "%s\n", speed_string); | |
309 | ||
310 | exit: | |
311 | return retval; | |
312 | } | |
313 | ||
f46753c5 | 314 | static struct pci_slot_attribute hotplug_slot_attr_cur_bus_speed = { |
1da177e4 LT |
315 | .attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO}, |
316 | .show = cur_bus_speed_read_file, | |
317 | }; | |
318 | ||
f46753c5 | 319 | static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf, |
1da177e4 LT |
320 | size_t count) |
321 | { | |
f46753c5 | 322 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
323 | unsigned long ltest; |
324 | u32 test; | |
325 | int retval = 0; | |
326 | ||
327 | ltest = simple_strtoul (buf, NULL, 10); | |
328 | test = (u32)(ltest & 0xffffffff); | |
329 | dbg ("test = %d\n", test); | |
330 | ||
331 | if (!try_module_get(slot->ops->owner)) { | |
332 | retval = -ENODEV; | |
333 | goto exit; | |
334 | } | |
335 | if (slot->ops->hardware_test) | |
336 | retval = slot->ops->hardware_test(slot, test); | |
337 | module_put(slot->ops->owner); | |
338 | ||
339 | exit: | |
340 | if (retval) | |
341 | return retval; | |
342 | return count; | |
343 | } | |
344 | ||
f46753c5 | 345 | static struct pci_slot_attribute hotplug_slot_attr_test = { |
1da177e4 LT |
346 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
347 | .store = test_write_file | |
348 | }; | |
349 | ||
f46753c5 | 350 | static int has_power_file(struct pci_slot *pci_slot) |
1da177e4 | 351 | { |
f46753c5 | 352 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
353 | if ((!slot) || (!slot->ops)) |
354 | return -ENODEV; | |
355 | if ((slot->ops->enable_slot) || | |
356 | (slot->ops->disable_slot) || | |
357 | (slot->ops->get_power_status)) | |
358 | return 0; | |
359 | return -ENOENT; | |
360 | } | |
361 | ||
f46753c5 | 362 | static int has_attention_file(struct pci_slot *pci_slot) |
1da177e4 | 363 | { |
f46753c5 | 364 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
365 | if ((!slot) || (!slot->ops)) |
366 | return -ENODEV; | |
367 | if ((slot->ops->set_attention_status) || | |
368 | (slot->ops->get_attention_status)) | |
369 | return 0; | |
370 | return -ENOENT; | |
371 | } | |
372 | ||
f46753c5 | 373 | static int has_latch_file(struct pci_slot *pci_slot) |
1da177e4 | 374 | { |
f46753c5 | 375 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
376 | if ((!slot) || (!slot->ops)) |
377 | return -ENODEV; | |
378 | if (slot->ops->get_latch_status) | |
379 | return 0; | |
380 | return -ENOENT; | |
381 | } | |
382 | ||
f46753c5 | 383 | static int has_adapter_file(struct pci_slot *pci_slot) |
1da177e4 | 384 | { |
f46753c5 | 385 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
386 | if ((!slot) || (!slot->ops)) |
387 | return -ENODEV; | |
388 | if (slot->ops->get_adapter_status) | |
389 | return 0; | |
390 | return -ENOENT; | |
391 | } | |
392 | ||
f46753c5 | 393 | static int has_max_bus_speed_file(struct pci_slot *pci_slot) |
1da177e4 | 394 | { |
f46753c5 | 395 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
396 | if ((!slot) || (!slot->ops)) |
397 | return -ENODEV; | |
398 | if (slot->ops->get_max_bus_speed) | |
399 | return 0; | |
400 | return -ENOENT; | |
401 | } | |
402 | ||
f46753c5 | 403 | static int has_cur_bus_speed_file(struct pci_slot *pci_slot) |
1da177e4 | 404 | { |
f46753c5 | 405 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
406 | if ((!slot) || (!slot->ops)) |
407 | return -ENODEV; | |
408 | if (slot->ops->get_cur_bus_speed) | |
409 | return 0; | |
410 | return -ENOENT; | |
411 | } | |
412 | ||
f46753c5 | 413 | static int has_test_file(struct pci_slot *pci_slot) |
1da177e4 | 414 | { |
f46753c5 | 415 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
416 | if ((!slot) || (!slot->ops)) |
417 | return -ENODEV; | |
418 | if (slot->ops->hardware_test) | |
419 | return 0; | |
420 | return -ENOENT; | |
421 | } | |
422 | ||
f46753c5 | 423 | static int fs_add_slot(struct pci_slot *slot) |
1da177e4 | 424 | { |
660a0e8f | 425 | int retval = 0; |
1da177e4 | 426 | |
660a0e8f GKH |
427 | if (has_power_file(slot) == 0) { |
428 | retval = sysfs_create_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
429 | if (retval) | |
430 | goto exit_power; | |
431 | } | |
1da177e4 | 432 | |
660a0e8f GKH |
433 | if (has_attention_file(slot) == 0) { |
434 | retval = sysfs_create_file(&slot->kobj, | |
435 | &hotplug_slot_attr_attention.attr); | |
436 | if (retval) | |
437 | goto exit_attention; | |
438 | } | |
1da177e4 | 439 | |
660a0e8f GKH |
440 | if (has_latch_file(slot) == 0) { |
441 | retval = sysfs_create_file(&slot->kobj, | |
442 | &hotplug_slot_attr_latch.attr); | |
443 | if (retval) | |
444 | goto exit_latch; | |
445 | } | |
1da177e4 | 446 | |
660a0e8f GKH |
447 | if (has_adapter_file(slot) == 0) { |
448 | retval = sysfs_create_file(&slot->kobj, | |
449 | &hotplug_slot_attr_presence.attr); | |
450 | if (retval) | |
451 | goto exit_adapter; | |
452 | } | |
1da177e4 | 453 | |
660a0e8f GKH |
454 | if (has_max_bus_speed_file(slot) == 0) { |
455 | retval = sysfs_create_file(&slot->kobj, | |
456 | &hotplug_slot_attr_max_bus_speed.attr); | |
457 | if (retval) | |
458 | goto exit_max_speed; | |
459 | } | |
460 | ||
461 | if (has_cur_bus_speed_file(slot) == 0) { | |
462 | retval = sysfs_create_file(&slot->kobj, | |
463 | &hotplug_slot_attr_cur_bus_speed.attr); | |
464 | if (retval) | |
465 | goto exit_cur_speed; | |
466 | } | |
467 | ||
468 | if (has_test_file(slot) == 0) { | |
469 | retval = sysfs_create_file(&slot->kobj, | |
470 | &hotplug_slot_attr_test.attr); | |
471 | if (retval) | |
472 | goto exit_test; | |
473 | } | |
474 | ||
475 | goto exit; | |
476 | ||
477 | exit_test: | |
1da177e4 | 478 | if (has_cur_bus_speed_file(slot) == 0) |
660a0e8f | 479 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); |
1da177e4 | 480 | |
660a0e8f GKH |
481 | exit_cur_speed: |
482 | if (has_max_bus_speed_file(slot) == 0) | |
483 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
1da177e4 | 484 | |
660a0e8f | 485 | exit_max_speed: |
660a0e8f GKH |
486 | if (has_adapter_file(slot) == 0) |
487 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
488 | ||
489 | exit_adapter: | |
490 | if (has_latch_file(slot) == 0) | |
491 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
492 | ||
493 | exit_latch: | |
494 | if (has_attention_file(slot) == 0) | |
495 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
496 | ||
497 | exit_attention: | |
498 | if (has_power_file(slot) == 0) | |
499 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
500 | exit_power: | |
501 | exit: | |
502 | return retval; | |
1da177e4 LT |
503 | } |
504 | ||
f46753c5 | 505 | static void fs_remove_slot(struct pci_slot *slot) |
1da177e4 LT |
506 | { |
507 | if (has_power_file(slot) == 0) | |
508 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); | |
509 | ||
510 | if (has_attention_file(slot) == 0) | |
511 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_attention.attr); | |
512 | ||
513 | if (has_latch_file(slot) == 0) | |
514 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); | |
515 | ||
516 | if (has_adapter_file(slot) == 0) | |
517 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr); | |
518 | ||
1da177e4 LT |
519 | if (has_max_bus_speed_file(slot) == 0) |
520 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr); | |
521 | ||
522 | if (has_cur_bus_speed_file(slot) == 0) | |
523 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); | |
524 | ||
525 | if (has_test_file(slot) == 0) | |
526 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr); | |
527 | } | |
528 | ||
529 | static struct hotplug_slot *get_slot_from_name (const char *name) | |
530 | { | |
531 | struct hotplug_slot *slot; | |
532 | struct list_head *tmp; | |
533 | ||
534 | list_for_each (tmp, &pci_hotplug_slot_list) { | |
535 | slot = list_entry (tmp, struct hotplug_slot, slot_list); | |
58319b80 | 536 | if (strcmp(hotplug_slot_name(slot), name) == 0) |
95cb9093 | 537 | return slot; |
1da177e4 | 538 | } |
95cb9093 | 539 | return NULL; |
1da177e4 LT |
540 | } |
541 | ||
542 | /** | |
543 | * pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem | |
65b943f6 | 544 | * @bus: bus this slot is on |
1da177e4 | 545 | * @slot: pointer to the &struct hotplug_slot to register |
65b943f6 | 546 | * @slot_nr: slot number |
1359f270 | 547 | * @name: name registered with kobject core |
1da177e4 LT |
548 | * |
549 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow | |
550 | * userspace interaction to the slot. | |
551 | * | |
552 | * Returns 0 if successful, anything else for an error. | |
553 | */ | |
1359f270 AC |
554 | int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr, |
555 | const char *name) | |
1da177e4 LT |
556 | { |
557 | int result; | |
f46753c5 | 558 | struct pci_slot *pci_slot; |
1da177e4 LT |
559 | |
560 | if (slot == NULL) | |
561 | return -ENODEV; | |
562 | if ((slot->info == NULL) || (slot->ops == NULL)) | |
563 | return -EINVAL; | |
564 | if (slot->release == NULL) { | |
a6f29a98 | 565 | dbg("Why are you trying to register a hotplug slot " |
1da177e4 LT |
566 | "without a proper release function?\n"); |
567 | return -EINVAL; | |
568 | } | |
569 | ||
95cb9093 KK |
570 | mutex_lock(&pci_hp_mutex); |
571 | ||
8344b568 AC |
572 | /* |
573 | * No problems if we call this interface from both ACPI_PCI_SLOT | |
574 | * driver and call it here again. If we've already created the | |
575 | * pci_slot, the interface will simply bump the refcount. | |
576 | */ | |
828f3768 | 577 | pci_slot = pci_create_slot(bus, slot_nr, name, slot); |
95cb9093 KK |
578 | if (IS_ERR(pci_slot)) { |
579 | result = PTR_ERR(pci_slot); | |
5fe6cc60 | 580 | goto out; |
1da177e4 | 581 | } |
64dbcac3 | 582 | |
f46753c5 AC |
583 | slot->pci_slot = pci_slot; |
584 | pci_slot->hotplug = slot; | |
585 | ||
f46753c5 | 586 | list_add(&slot->slot_list, &pci_hotplug_slot_list); |
f46753c5 AC |
587 | |
588 | result = fs_add_slot(pci_slot); | |
589 | kobject_uevent(&pci_slot->kobj, KOBJ_ADD); | |
1359f270 | 590 | dbg("Added slot %s to the list\n", name); |
95cb9093 KK |
591 | out: |
592 | mutex_unlock(&pci_hp_mutex); | |
1da177e4 LT |
593 | return result; |
594 | } | |
595 | ||
596 | /** | |
597 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem | |
65b943f6 | 598 | * @hotplug: pointer to the &struct hotplug_slot to deregister |
1da177e4 LT |
599 | * |
600 | * The @slot must have been registered with the pci hotplug subsystem | |
601 | * previously with a call to pci_hp_register(). | |
602 | * | |
603 | * Returns 0 if successful, anything else for an error. | |
604 | */ | |
f46753c5 | 605 | int pci_hp_deregister(struct hotplug_slot *hotplug) |
1da177e4 LT |
606 | { |
607 | struct hotplug_slot *temp; | |
f46753c5 | 608 | struct pci_slot *slot; |
1da177e4 | 609 | |
f46753c5 | 610 | if (!hotplug) |
1da177e4 LT |
611 | return -ENODEV; |
612 | ||
95cb9093 | 613 | mutex_lock(&pci_hp_mutex); |
58319b80 | 614 | temp = get_slot_from_name(hotplug_slot_name(hotplug)); |
95cb9093 KK |
615 | if (temp != hotplug) { |
616 | mutex_unlock(&pci_hp_mutex); | |
1da177e4 | 617 | return -ENODEV; |
95cb9093 | 618 | } |
1da177e4 | 619 | |
f46753c5 | 620 | list_del(&hotplug->slot_list); |
f46753c5 AC |
621 | |
622 | slot = hotplug->pci_slot; | |
623 | fs_remove_slot(slot); | |
58319b80 | 624 | dbg("Removed slot %s from the list\n", hotplug_slot_name(hotplug)); |
f46753c5 AC |
625 | |
626 | hotplug->release(hotplug); | |
627 | slot->hotplug = NULL; | |
628 | pci_destroy_slot(slot); | |
95cb9093 | 629 | mutex_unlock(&pci_hp_mutex); |
f46753c5 | 630 | |
1da177e4 LT |
631 | return 0; |
632 | } | |
633 | ||
634 | /** | |
635 | * pci_hp_change_slot_info - changes the slot's information structure in the core | |
65b943f6 | 636 | * @hotplug: pointer to the slot whose info has changed |
1da177e4 LT |
637 | * @info: pointer to the info copy into the slot's info structure |
638 | * | |
639 | * @slot must have been registered with the pci | |
640 | * hotplug subsystem previously with a call to pci_hp_register(). | |
641 | * | |
642 | * Returns 0 if successful, anything else for an error. | |
643 | */ | |
f46753c5 | 644 | int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug, |
660a0e8f | 645 | struct hotplug_slot_info *info) |
1da177e4 | 646 | { |
f46753c5 AC |
647 | struct pci_slot *slot; |
648 | if (!hotplug || !info) | |
1da177e4 | 649 | return -ENODEV; |
f46753c5 | 650 | slot = hotplug->pci_slot; |
1da177e4 | 651 | |
f46753c5 | 652 | memcpy(hotplug->info, info, sizeof(struct hotplug_slot_info)); |
1da177e4 LT |
653 | |
654 | return 0; | |
655 | } | |
656 | ||
657 | static int __init pci_hotplug_init (void) | |
658 | { | |
659 | int result; | |
0fed80f7 | 660 | |
1da177e4 LT |
661 | result = cpci_hotplug_init(debug); |
662 | if (result) { | |
663 | err ("cpci_hotplug_init with error %d\n", result); | |
f46753c5 | 664 | goto err_cpci; |
1da177e4 LT |
665 | } |
666 | ||
667 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
81ace5cd | 668 | |
f46753c5 | 669 | err_cpci: |
1da177e4 LT |
670 | return result; |
671 | } | |
672 | ||
673 | static void __exit pci_hotplug_exit (void) | |
674 | { | |
675 | cpci_hotplug_exit(); | |
1da177e4 LT |
676 | } |
677 | ||
678 | module_init(pci_hotplug_init); | |
679 | module_exit(pci_hotplug_exit); | |
680 | ||
681 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
682 | MODULE_DESCRIPTION(DRIVER_DESC); | |
683 | MODULE_LICENSE("GPL"); | |
684 | module_param(debug, bool, 0644); | |
685 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); | |
686 | ||
1da177e4 LT |
687 | EXPORT_SYMBOL_GPL(pci_hp_register); |
688 | EXPORT_SYMBOL_GPL(pci_hp_deregister); | |
689 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |