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 | ||
57b51b9a | 28 | #include <linux/module.h> /* try_module_get & module_put */ |
1da177e4 LT |
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 | 35 | #include <linux/pagemap.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/mount.h> | |
38 | #include <linux/namei.h> | |
95cb9093 | 39 | #include <linux/mutex.h> |
1da177e4 | 40 | #include <linux/pci.h> |
7a54f25c | 41 | #include <linux/pci_hotplug.h> |
1da177e4 | 42 | #include <asm/uaccess.h> |
f46753c5 | 43 | #include "../pci.h" |
c3139ba2 | 44 | #include "cpci_hotplug.h" |
1da177e4 LT |
45 | |
46 | #define MY_NAME "pci_hotplug" | |
47 | ||
ff3ce480 BS |
48 | #define dbg(fmt, arg...) do { if (debug) printk(KERN_DEBUG "%s: %s: " fmt, MY_NAME, __func__, ## arg); } while (0) |
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) | |
1da177e4 LT |
52 | |
53 | ||
54 | /* local variables */ | |
90ab5ee9 | 55 | static bool debug; |
1da177e4 LT |
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 | ||
1da177e4 | 62 | static LIST_HEAD(pci_hotplug_slot_list); |
95cb9093 | 63 | static DEFINE_MUTEX(pci_hp_mutex); |
1da177e4 | 64 | |
1da177e4 | 65 | /* Weee, fun with macros... */ |
3c78bc61 RD |
66 | #define GET_STATUS(name, type) \ |
67 | static int get_##name(struct hotplug_slot *slot, type *value) \ | |
1da177e4 LT |
68 | { \ |
69 | struct hotplug_slot_ops *ops = slot->ops; \ | |
70 | int retval = 0; \ | |
bd1d9855 | 71 | if (!try_module_get(ops->owner)) \ |
c8761fe8 ZY |
72 | return -ENODEV; \ |
73 | if (ops->get_##name) \ | |
74 | retval = ops->get_##name(slot, value); \ | |
75 | else \ | |
76 | *value = slot->info->name; \ | |
77 | module_put(ops->owner); \ | |
1da177e4 LT |
78 | return retval; \ |
79 | } | |
80 | ||
81 | GET_STATUS(power_status, u8) | |
82 | GET_STATUS(attention_status, u8) | |
83 | GET_STATUS(latch_status, u8) | |
84 | GET_STATUS(adapter_status, u8) | |
1da177e4 | 85 | |
a6ed1f4e | 86 | static ssize_t power_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
87 | { |
88 | int retval; | |
89 | u8 value; | |
90 | ||
a6ed1f4e | 91 | retval = get_power_status(pci_slot->hotplug, &value); |
1da177e4 | 92 | if (retval) |
3c78bc61 RD |
93 | return retval; |
94 | ||
95 | return sprintf(buf, "%d\n", value); | |
1da177e4 LT |
96 | } |
97 | ||
f46753c5 | 98 | static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf, |
3c78bc61 | 99 | size_t count) |
1da177e4 | 100 | { |
f46753c5 | 101 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
102 | unsigned long lpower; |
103 | u8 power; | |
104 | int retval = 0; | |
105 | ||
3c78bc61 | 106 | lpower = simple_strtoul(buf, NULL, 10); |
1da177e4 | 107 | power = (u8)(lpower & 0xff); |
3c78bc61 | 108 | dbg("power = %d\n", power); |
1da177e4 LT |
109 | |
110 | if (!try_module_get(slot->ops->owner)) { | |
111 | retval = -ENODEV; | |
112 | goto exit; | |
113 | } | |
114 | switch (power) { | |
3c78bc61 RD |
115 | case 0: |
116 | if (slot->ops->disable_slot) | |
117 | retval = slot->ops->disable_slot(slot); | |
118 | break; | |
119 | ||
120 | case 1: | |
121 | if (slot->ops->enable_slot) | |
122 | retval = slot->ops->enable_slot(slot); | |
123 | break; | |
124 | ||
125 | default: | |
126 | err("Illegal value specified for power\n"); | |
127 | retval = -EINVAL; | |
1da177e4 LT |
128 | } |
129 | module_put(slot->ops->owner); | |
130 | ||
f7625980 | 131 | exit: |
1da177e4 LT |
132 | if (retval) |
133 | return retval; | |
134 | return count; | |
135 | } | |
136 | ||
f46753c5 | 137 | static struct pci_slot_attribute hotplug_slot_attr_power = { |
1da177e4 LT |
138 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
139 | .show = power_read_file, | |
140 | .store = power_write_file | |
141 | }; | |
142 | ||
a6ed1f4e | 143 | static ssize_t attention_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
144 | { |
145 | int retval; | |
146 | u8 value; | |
147 | ||
a6ed1f4e | 148 | retval = get_attention_status(pci_slot->hotplug, &value); |
1da177e4 | 149 | if (retval) |
3c78bc61 | 150 | return retval; |
1da177e4 | 151 | |
3c78bc61 | 152 | return sprintf(buf, "%d\n", value); |
1da177e4 LT |
153 | } |
154 | ||
a6ed1f4e | 155 | static ssize_t attention_write_file(struct pci_slot *pci_slot, const char *buf, |
3c78bc61 | 156 | size_t count) |
1da177e4 | 157 | { |
a6ed1f4e | 158 | struct hotplug_slot_ops *ops = pci_slot->hotplug->ops; |
1da177e4 LT |
159 | unsigned long lattention; |
160 | u8 attention; | |
161 | int retval = 0; | |
162 | ||
3c78bc61 | 163 | lattention = simple_strtoul(buf, NULL, 10); |
1da177e4 | 164 | attention = (u8)(lattention & 0xff); |
3c78bc61 | 165 | dbg(" - attention = %d\n", attention); |
1da177e4 | 166 | |
f46753c5 | 167 | if (!try_module_get(ops->owner)) { |
1da177e4 LT |
168 | retval = -ENODEV; |
169 | goto exit; | |
170 | } | |
f46753c5 | 171 | if (ops->set_attention_status) |
a6ed1f4e | 172 | retval = ops->set_attention_status(pci_slot->hotplug, attention); |
f46753c5 | 173 | module_put(ops->owner); |
1da177e4 | 174 | |
f7625980 | 175 | exit: |
1da177e4 LT |
176 | if (retval) |
177 | return retval; | |
178 | return count; | |
179 | } | |
180 | ||
f46753c5 | 181 | static struct pci_slot_attribute hotplug_slot_attr_attention = { |
1da177e4 LT |
182 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
183 | .show = attention_read_file, | |
184 | .store = attention_write_file | |
185 | }; | |
186 | ||
a6ed1f4e | 187 | static ssize_t latch_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
188 | { |
189 | int retval; | |
190 | u8 value; | |
191 | ||
a6ed1f4e | 192 | retval = get_latch_status(pci_slot->hotplug, &value); |
1da177e4 | 193 | if (retval) |
3c78bc61 | 194 | return retval; |
1da177e4 | 195 | |
3c78bc61 | 196 | return sprintf(buf, "%d\n", value); |
1da177e4 LT |
197 | } |
198 | ||
f46753c5 | 199 | static struct pci_slot_attribute hotplug_slot_attr_latch = { |
1da177e4 LT |
200 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, |
201 | .show = latch_read_file, | |
202 | }; | |
203 | ||
a6ed1f4e | 204 | static ssize_t presence_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
205 | { |
206 | int retval; | |
207 | u8 value; | |
208 | ||
a6ed1f4e | 209 | retval = get_adapter_status(pci_slot->hotplug, &value); |
1da177e4 | 210 | if (retval) |
3c78bc61 | 211 | return retval; |
1da177e4 | 212 | |
3c78bc61 | 213 | return sprintf(buf, "%d\n", value); |
1da177e4 LT |
214 | } |
215 | ||
f46753c5 | 216 | static struct pci_slot_attribute hotplug_slot_attr_presence = { |
1da177e4 LT |
217 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, |
218 | .show = presence_read_file, | |
219 | }; | |
220 | ||
f46753c5 | 221 | static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf, |
3c78bc61 | 222 | size_t count) |
1da177e4 | 223 | { |
f46753c5 | 224 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
225 | unsigned long ltest; |
226 | u32 test; | |
227 | int retval = 0; | |
228 | ||
ff3ce480 | 229 | ltest = simple_strtoul(buf, NULL, 10); |
1da177e4 | 230 | test = (u32)(ltest & 0xffffffff); |
3c78bc61 | 231 | dbg("test = %d\n", test); |
1da177e4 LT |
232 | |
233 | if (!try_module_get(slot->ops->owner)) { | |
234 | retval = -ENODEV; | |
235 | goto exit; | |
236 | } | |
237 | if (slot->ops->hardware_test) | |
238 | retval = slot->ops->hardware_test(slot, test); | |
239 | module_put(slot->ops->owner); | |
240 | ||
f7625980 | 241 | exit: |
1da177e4 LT |
242 | if (retval) |
243 | return retval; | |
244 | return count; | |
245 | } | |
246 | ||
f46753c5 | 247 | static struct pci_slot_attribute hotplug_slot_attr_test = { |
1da177e4 LT |
248 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
249 | .store = test_write_file | |
250 | }; | |
251 | ||
498a8faf | 252 | static bool has_power_file(struct pci_slot *pci_slot) |
1da177e4 | 253 | { |
f46753c5 | 254 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 255 | |
1da177e4 | 256 | if ((!slot) || (!slot->ops)) |
498a8faf | 257 | return false; |
1da177e4 LT |
258 | if ((slot->ops->enable_slot) || |
259 | (slot->ops->disable_slot) || | |
260 | (slot->ops->get_power_status)) | |
498a8faf KK |
261 | return true; |
262 | return false; | |
1da177e4 LT |
263 | } |
264 | ||
498a8faf | 265 | static bool has_attention_file(struct pci_slot *pci_slot) |
1da177e4 | 266 | { |
f46753c5 | 267 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 268 | |
1da177e4 | 269 | if ((!slot) || (!slot->ops)) |
498a8faf | 270 | return false; |
1da177e4 LT |
271 | if ((slot->ops->set_attention_status) || |
272 | (slot->ops->get_attention_status)) | |
498a8faf KK |
273 | return true; |
274 | return false; | |
1da177e4 LT |
275 | } |
276 | ||
498a8faf | 277 | static bool has_latch_file(struct pci_slot *pci_slot) |
1da177e4 | 278 | { |
f46753c5 | 279 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 280 | |
1da177e4 | 281 | if ((!slot) || (!slot->ops)) |
498a8faf | 282 | return false; |
1da177e4 | 283 | if (slot->ops->get_latch_status) |
498a8faf KK |
284 | return true; |
285 | return false; | |
1da177e4 LT |
286 | } |
287 | ||
498a8faf | 288 | static bool has_adapter_file(struct pci_slot *pci_slot) |
1da177e4 | 289 | { |
f46753c5 | 290 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 291 | |
1da177e4 | 292 | if ((!slot) || (!slot->ops)) |
498a8faf | 293 | return false; |
1da177e4 | 294 | if (slot->ops->get_adapter_status) |
498a8faf KK |
295 | return true; |
296 | return false; | |
1da177e4 LT |
297 | } |
298 | ||
498a8faf | 299 | static bool has_test_file(struct pci_slot *pci_slot) |
1da177e4 | 300 | { |
f46753c5 | 301 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 302 | |
1da177e4 | 303 | if ((!slot) || (!slot->ops)) |
498a8faf | 304 | return false; |
1da177e4 | 305 | if (slot->ops->hardware_test) |
498a8faf KK |
306 | return true; |
307 | return false; | |
1da177e4 LT |
308 | } |
309 | ||
a6ed1f4e | 310 | static int fs_add_slot(struct pci_slot *pci_slot) |
1da177e4 | 311 | { |
660a0e8f | 312 | int retval = 0; |
1da177e4 | 313 | |
c825bc94 | 314 | /* Create symbolic link to the hotplug driver module */ |
a6ed1f4e | 315 | pci_hp_create_module_link(pci_slot); |
c825bc94 | 316 | |
a6ed1f4e YW |
317 | if (has_power_file(pci_slot)) { |
318 | retval = sysfs_create_file(&pci_slot->kobj, | |
498a8faf | 319 | &hotplug_slot_attr_power.attr); |
660a0e8f GKH |
320 | if (retval) |
321 | goto exit_power; | |
322 | } | |
1da177e4 | 323 | |
a6ed1f4e YW |
324 | if (has_attention_file(pci_slot)) { |
325 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
326 | &hotplug_slot_attr_attention.attr); |
327 | if (retval) | |
328 | goto exit_attention; | |
329 | } | |
1da177e4 | 330 | |
a6ed1f4e YW |
331 | if (has_latch_file(pci_slot)) { |
332 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
333 | &hotplug_slot_attr_latch.attr); |
334 | if (retval) | |
335 | goto exit_latch; | |
336 | } | |
1da177e4 | 337 | |
a6ed1f4e YW |
338 | if (has_adapter_file(pci_slot)) { |
339 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
340 | &hotplug_slot_attr_presence.attr); |
341 | if (retval) | |
342 | goto exit_adapter; | |
343 | } | |
1da177e4 | 344 | |
a6ed1f4e YW |
345 | if (has_test_file(pci_slot)) { |
346 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
347 | &hotplug_slot_attr_test.attr); |
348 | if (retval) | |
349 | goto exit_test; | |
350 | } | |
351 | ||
352 | goto exit; | |
353 | ||
354 | exit_test: | |
a6ed1f4e YW |
355 | if (has_adapter_file(pci_slot)) |
356 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 357 | &hotplug_slot_attr_presence.attr); |
660a0e8f | 358 | exit_adapter: |
a6ed1f4e YW |
359 | if (has_latch_file(pci_slot)) |
360 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_latch.attr); | |
660a0e8f | 361 | exit_latch: |
a6ed1f4e YW |
362 | if (has_attention_file(pci_slot)) |
363 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 364 | &hotplug_slot_attr_attention.attr); |
660a0e8f | 365 | exit_attention: |
a6ed1f4e YW |
366 | if (has_power_file(pci_slot)) |
367 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_power.attr); | |
660a0e8f | 368 | exit_power: |
a6ed1f4e | 369 | pci_hp_remove_module_link(pci_slot); |
660a0e8f GKH |
370 | exit: |
371 | return retval; | |
1da177e4 LT |
372 | } |
373 | ||
a6ed1f4e | 374 | static void fs_remove_slot(struct pci_slot *pci_slot) |
1da177e4 | 375 | { |
a6ed1f4e YW |
376 | if (has_power_file(pci_slot)) |
377 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_power.attr); | |
1da177e4 | 378 | |
a6ed1f4e YW |
379 | if (has_attention_file(pci_slot)) |
380 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 381 | &hotplug_slot_attr_attention.attr); |
1da177e4 | 382 | |
a6ed1f4e YW |
383 | if (has_latch_file(pci_slot)) |
384 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_latch.attr); | |
1da177e4 | 385 | |
a6ed1f4e YW |
386 | if (has_adapter_file(pci_slot)) |
387 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 388 | &hotplug_slot_attr_presence.attr); |
1da177e4 | 389 | |
a6ed1f4e YW |
390 | if (has_test_file(pci_slot)) |
391 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_test.attr); | |
c825bc94 | 392 | |
a6ed1f4e | 393 | pci_hp_remove_module_link(pci_slot); |
1da177e4 LT |
394 | } |
395 | ||
3c78bc61 | 396 | static struct hotplug_slot *get_slot_from_name(const char *name) |
1da177e4 LT |
397 | { |
398 | struct hotplug_slot *slot; | |
1da177e4 | 399 | |
2ac83ccc | 400 | list_for_each_entry(slot, &pci_hotplug_slot_list, slot_list) { |
58319b80 | 401 | if (strcmp(hotplug_slot_name(slot), name) == 0) |
95cb9093 | 402 | return slot; |
1da177e4 | 403 | } |
95cb9093 | 404 | return NULL; |
1da177e4 LT |
405 | } |
406 | ||
407 | /** | |
c825bc94 | 408 | * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem |
65b943f6 | 409 | * @bus: bus this slot is on |
1da177e4 | 410 | * @slot: pointer to the &struct hotplug_slot to register |
c825bc94 | 411 | * @devnr: device number |
1359f270 | 412 | * @name: name registered with kobject core |
503998ca RD |
413 | * @owner: caller module owner |
414 | * @mod_name: caller module name | |
1da177e4 LT |
415 | * |
416 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow | |
417 | * userspace interaction to the slot. | |
418 | * | |
419 | * Returns 0 if successful, anything else for an error. | |
420 | */ | |
c825bc94 KK |
421 | int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, |
422 | int devnr, const char *name, | |
423 | struct module *owner, const char *mod_name) | |
1da177e4 LT |
424 | { |
425 | int result; | |
f46753c5 | 426 | struct pci_slot *pci_slot; |
1da177e4 LT |
427 | |
428 | if (slot == NULL) | |
429 | return -ENODEV; | |
430 | if ((slot->info == NULL) || (slot->ops == NULL)) | |
431 | return -EINVAL; | |
432 | if (slot->release == NULL) { | |
227f0647 | 433 | dbg("Why are you trying to register a hotplug slot without a proper release function?\n"); |
1da177e4 LT |
434 | return -EINVAL; |
435 | } | |
436 | ||
c825bc94 KK |
437 | slot->ops->owner = owner; |
438 | slot->ops->mod_name = mod_name; | |
95cb9093 | 439 | |
c825bc94 | 440 | mutex_lock(&pci_hp_mutex); |
8344b568 AC |
441 | /* |
442 | * No problems if we call this interface from both ACPI_PCI_SLOT | |
443 | * driver and call it here again. If we've already created the | |
444 | * pci_slot, the interface will simply bump the refcount. | |
445 | */ | |
c825bc94 | 446 | pci_slot = pci_create_slot(bus, devnr, name, slot); |
95cb9093 KK |
447 | if (IS_ERR(pci_slot)) { |
448 | result = PTR_ERR(pci_slot); | |
5fe6cc60 | 449 | goto out; |
1da177e4 | 450 | } |
64dbcac3 | 451 | |
f46753c5 AC |
452 | slot->pci_slot = pci_slot; |
453 | pci_slot->hotplug = slot; | |
454 | ||
f46753c5 | 455 | list_add(&slot->slot_list, &pci_hotplug_slot_list); |
f46753c5 AC |
456 | |
457 | result = fs_add_slot(pci_slot); | |
458 | kobject_uevent(&pci_slot->kobj, KOBJ_ADD); | |
1359f270 | 459 | dbg("Added slot %s to the list\n", name); |
95cb9093 KK |
460 | out: |
461 | mutex_unlock(&pci_hp_mutex); | |
1da177e4 LT |
462 | return result; |
463 | } | |
b7fe9434 | 464 | EXPORT_SYMBOL_GPL(__pci_hp_register); |
1da177e4 LT |
465 | |
466 | /** | |
467 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem | |
a6ed1f4e | 468 | * @slot: pointer to the &struct hotplug_slot to deregister |
1da177e4 LT |
469 | * |
470 | * The @slot must have been registered with the pci hotplug subsystem | |
471 | * previously with a call to pci_hp_register(). | |
472 | * | |
473 | * Returns 0 if successful, anything else for an error. | |
474 | */ | |
a6ed1f4e | 475 | int pci_hp_deregister(struct hotplug_slot *slot) |
1da177e4 LT |
476 | { |
477 | struct hotplug_slot *temp; | |
a6ed1f4e | 478 | struct pci_slot *pci_slot; |
1da177e4 | 479 | |
a6ed1f4e | 480 | if (!slot) |
1da177e4 LT |
481 | return -ENODEV; |
482 | ||
95cb9093 | 483 | mutex_lock(&pci_hp_mutex); |
a6ed1f4e YW |
484 | temp = get_slot_from_name(hotplug_slot_name(slot)); |
485 | if (temp != slot) { | |
95cb9093 | 486 | mutex_unlock(&pci_hp_mutex); |
1da177e4 | 487 | return -ENODEV; |
95cb9093 | 488 | } |
1da177e4 | 489 | |
a6ed1f4e | 490 | list_del(&slot->slot_list); |
f46753c5 | 491 | |
a6ed1f4e YW |
492 | pci_slot = slot->pci_slot; |
493 | fs_remove_slot(pci_slot); | |
494 | dbg("Removed slot %s from the list\n", hotplug_slot_name(slot)); | |
f46753c5 | 495 | |
a6ed1f4e YW |
496 | slot->release(slot); |
497 | pci_slot->hotplug = NULL; | |
498 | pci_destroy_slot(pci_slot); | |
95cb9093 | 499 | mutex_unlock(&pci_hp_mutex); |
f46753c5 | 500 | |
1da177e4 LT |
501 | return 0; |
502 | } | |
b7fe9434 | 503 | EXPORT_SYMBOL_GPL(pci_hp_deregister); |
1da177e4 LT |
504 | |
505 | /** | |
506 | * pci_hp_change_slot_info - changes the slot's information structure in the core | |
a6ed1f4e | 507 | * @slot: pointer to the slot whose info has changed |
1da177e4 LT |
508 | * @info: pointer to the info copy into the slot's info structure |
509 | * | |
f7625980 | 510 | * @slot must have been registered with the pci |
1da177e4 LT |
511 | * hotplug subsystem previously with a call to pci_hp_register(). |
512 | * | |
513 | * Returns 0 if successful, anything else for an error. | |
514 | */ | |
a6ed1f4e | 515 | int pci_hp_change_slot_info(struct hotplug_slot *slot, |
d67aed63 | 516 | struct hotplug_slot_info *info) |
1da177e4 | 517 | { |
a6ed1f4e | 518 | if (!slot || !info) |
1da177e4 LT |
519 | return -ENODEV; |
520 | ||
a6ed1f4e | 521 | memcpy(slot->info, info, sizeof(struct hotplug_slot_info)); |
1da177e4 LT |
522 | |
523 | return 0; | |
524 | } | |
b7fe9434 | 525 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |
1da177e4 | 526 | |
3c78bc61 | 527 | static int __init pci_hotplug_init(void) |
1da177e4 LT |
528 | { |
529 | int result; | |
0fed80f7 | 530 | |
1da177e4 LT |
531 | result = cpci_hotplug_init(debug); |
532 | if (result) { | |
3c78bc61 RD |
533 | err("cpci_hotplug_init with error %d\n", result); |
534 | return result; | |
1da177e4 LT |
535 | } |
536 | ||
3c78bc61 | 537 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
1da177e4 LT |
538 | return result; |
539 | } | |
57b51b9a | 540 | device_initcall(pci_hotplug_init); |
1da177e4 | 541 | |
57b51b9a PG |
542 | /* |
543 | * not really modular, but the easiest way to keep compat with existing | |
544 | * bootargs behaviour is to continue using module_param here. | |
545 | */ | |
1da177e4 LT |
546 | module_param(debug, bool, 0644); |
547 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); |