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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 */ | |
17d67152 SA |
71 | "66 MHz PCI-X", /* 0x02 */ |
72 | "100 MHz PCI-X", /* 0x03 */ | |
73 | "133 MHz PCI-X", /* 0x04 */ | |
1da177e4 LT |
74 | NULL, /* 0x05 */ |
75 | NULL, /* 0x06 */ | |
76 | NULL, /* 0x07 */ | |
77 | NULL, /* 0x08 */ | |
17d67152 SA |
78 | "66 MHz PCI-X 266", /* 0x09 */ |
79 | "100 MHz PCI-X 266", /* 0x0a */ | |
80 | "133 MHz PCI-X 266", /* 0x0b */ | |
1da177e4 LT |
81 | NULL, /* 0x0c */ |
82 | NULL, /* 0x0d */ | |
83 | NULL, /* 0x0e */ | |
84 | NULL, /* 0x0f */ | |
85 | NULL, /* 0x10 */ | |
17d67152 SA |
86 | "66 MHz PCI-X 533", /* 0x11 */ |
87 | "100 MHz PCI-X 533", /* 0x12 */ | |
88 | "133 MHz PCI-X 533", /* 0x13 */ | |
89 | "2.5 GT/s PCIe", /* 0x14 */ | |
90 | "5.0 GT/s PCIe", /* 0x15 */ | |
1da177e4 LT |
91 | }; |
92 | ||
93 | #ifdef CONFIG_HOTPLUG_PCI_CPCI | |
94 | extern int cpci_hotplug_init(int debug); | |
95 | extern void cpci_hotplug_exit(void); | |
96 | #else | |
97 | static inline int cpci_hotplug_init(int debug) { return 0; } | |
98 | static inline void cpci_hotplug_exit(void) { } | |
99 | #endif | |
100 | ||
101 | /* Weee, fun with macros... */ | |
102 | #define GET_STATUS(name,type) \ | |
103 | static int get_##name (struct hotplug_slot *slot, type *value) \ | |
104 | { \ | |
105 | struct hotplug_slot_ops *ops = slot->ops; \ | |
106 | int retval = 0; \ | |
bd1d9855 | 107 | if (!try_module_get(ops->owner)) \ |
c8761fe8 ZY |
108 | return -ENODEV; \ |
109 | if (ops->get_##name) \ | |
110 | retval = ops->get_##name(slot, value); \ | |
111 | else \ | |
112 | *value = slot->info->name; \ | |
113 | module_put(ops->owner); \ | |
1da177e4 LT |
114 | return retval; \ |
115 | } | |
116 | ||
117 | GET_STATUS(power_status, u8) | |
118 | GET_STATUS(attention_status, u8) | |
119 | GET_STATUS(latch_status, u8) | |
120 | GET_STATUS(adapter_status, u8) | |
1da177e4 LT |
121 | GET_STATUS(max_bus_speed, enum pci_bus_speed) |
122 | GET_STATUS(cur_bus_speed, enum pci_bus_speed) | |
123 | ||
f46753c5 | 124 | static ssize_t power_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
125 | { |
126 | int retval; | |
127 | u8 value; | |
128 | ||
f46753c5 | 129 | retval = get_power_status(slot->hotplug, &value); |
1da177e4 LT |
130 | if (retval) |
131 | goto exit; | |
132 | retval = sprintf (buf, "%d\n", value); | |
133 | exit: | |
134 | return retval; | |
135 | } | |
136 | ||
f46753c5 | 137 | static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf, |
1da177e4 LT |
138 | size_t count) |
139 | { | |
f46753c5 | 140 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
141 | unsigned long lpower; |
142 | u8 power; | |
143 | int retval = 0; | |
144 | ||
145 | lpower = simple_strtoul (buf, NULL, 10); | |
146 | power = (u8)(lpower & 0xff); | |
147 | dbg ("power = %d\n", power); | |
148 | ||
149 | if (!try_module_get(slot->ops->owner)) { | |
150 | retval = -ENODEV; | |
151 | goto exit; | |
152 | } | |
153 | switch (power) { | |
154 | case 0: | |
155 | if (slot->ops->disable_slot) | |
156 | retval = slot->ops->disable_slot(slot); | |
157 | break; | |
158 | ||
159 | case 1: | |
160 | if (slot->ops->enable_slot) | |
161 | retval = slot->ops->enable_slot(slot); | |
162 | break; | |
163 | ||
164 | default: | |
165 | err ("Illegal value specified for power\n"); | |
166 | retval = -EINVAL; | |
167 | } | |
168 | module_put(slot->ops->owner); | |
169 | ||
170 | exit: | |
171 | if (retval) | |
172 | return retval; | |
173 | return count; | |
174 | } | |
175 | ||
f46753c5 | 176 | static struct pci_slot_attribute hotplug_slot_attr_power = { |
1da177e4 LT |
177 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
178 | .show = power_read_file, | |
179 | .store = power_write_file | |
180 | }; | |
181 | ||
f46753c5 | 182 | static ssize_t attention_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
183 | { |
184 | int retval; | |
185 | u8 value; | |
186 | ||
f46753c5 | 187 | retval = get_attention_status(slot->hotplug, &value); |
1da177e4 LT |
188 | if (retval) |
189 | goto exit; | |
f46753c5 | 190 | retval = sprintf(buf, "%d\n", value); |
1da177e4 LT |
191 | |
192 | exit: | |
193 | return retval; | |
194 | } | |
195 | ||
f46753c5 | 196 | static ssize_t attention_write_file(struct pci_slot *slot, const char *buf, |
1da177e4 LT |
197 | size_t count) |
198 | { | |
f46753c5 | 199 | struct hotplug_slot_ops *ops = slot->hotplug->ops; |
1da177e4 LT |
200 | unsigned long lattention; |
201 | u8 attention; | |
202 | int retval = 0; | |
203 | ||
204 | lattention = simple_strtoul (buf, NULL, 10); | |
205 | attention = (u8)(lattention & 0xff); | |
206 | dbg (" - attention = %d\n", attention); | |
207 | ||
f46753c5 | 208 | if (!try_module_get(ops->owner)) { |
1da177e4 LT |
209 | retval = -ENODEV; |
210 | goto exit; | |
211 | } | |
f46753c5 AC |
212 | if (ops->set_attention_status) |
213 | retval = ops->set_attention_status(slot->hotplug, attention); | |
214 | module_put(ops->owner); | |
1da177e4 LT |
215 | |
216 | exit: | |
217 | if (retval) | |
218 | return retval; | |
219 | return count; | |
220 | } | |
221 | ||
f46753c5 | 222 | static struct pci_slot_attribute hotplug_slot_attr_attention = { |
1da177e4 LT |
223 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
224 | .show = attention_read_file, | |
225 | .store = attention_write_file | |
226 | }; | |
227 | ||
f46753c5 | 228 | static ssize_t latch_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
229 | { |
230 | int retval; | |
231 | u8 value; | |
232 | ||
f46753c5 | 233 | retval = get_latch_status(slot->hotplug, &value); |
1da177e4 LT |
234 | if (retval) |
235 | goto exit; | |
236 | retval = sprintf (buf, "%d\n", value); | |
237 | ||
238 | exit: | |
239 | return retval; | |
240 | } | |
241 | ||
f46753c5 | 242 | static struct pci_slot_attribute hotplug_slot_attr_latch = { |
1da177e4 LT |
243 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, |
244 | .show = latch_read_file, | |
245 | }; | |
246 | ||
f46753c5 | 247 | static ssize_t presence_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
248 | { |
249 | int retval; | |
250 | u8 value; | |
251 | ||
f46753c5 | 252 | retval = get_adapter_status(slot->hotplug, &value); |
1da177e4 LT |
253 | if (retval) |
254 | goto exit; | |
255 | retval = sprintf (buf, "%d\n", value); | |
256 | ||
257 | exit: | |
258 | return retval; | |
259 | } | |
260 | ||
f46753c5 | 261 | static struct pci_slot_attribute hotplug_slot_attr_presence = { |
1da177e4 LT |
262 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, |
263 | .show = presence_read_file, | |
264 | }; | |
265 | ||
1da177e4 LT |
266 | static char *unknown_speed = "Unknown bus speed"; |
267 | ||
f46753c5 | 268 | static ssize_t max_bus_speed_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
269 | { |
270 | char *speed_string; | |
271 | int retval; | |
272 | enum pci_bus_speed value; | |
273 | ||
f46753c5 | 274 | retval = get_max_bus_speed(slot->hotplug, &value); |
1da177e4 LT |
275 | if (retval) |
276 | goto exit; | |
277 | ||
278 | if (value == PCI_SPEED_UNKNOWN) | |
279 | speed_string = unknown_speed; | |
280 | else | |
281 | speed_string = pci_bus_speed_strings[value]; | |
282 | ||
283 | retval = sprintf (buf, "%s\n", speed_string); | |
284 | ||
285 | exit: | |
286 | return retval; | |
287 | } | |
288 | ||
f46753c5 | 289 | static struct pci_slot_attribute hotplug_slot_attr_max_bus_speed = { |
1da177e4 LT |
290 | .attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO}, |
291 | .show = max_bus_speed_read_file, | |
292 | }; | |
293 | ||
f46753c5 | 294 | static ssize_t cur_bus_speed_read_file(struct pci_slot *slot, char *buf) |
1da177e4 LT |
295 | { |
296 | char *speed_string; | |
297 | int retval; | |
298 | enum pci_bus_speed value; | |
299 | ||
f46753c5 | 300 | retval = get_cur_bus_speed(slot->hotplug, &value); |
1da177e4 LT |
301 | if (retval) |
302 | goto exit; | |
303 | ||
304 | if (value == PCI_SPEED_UNKNOWN) | |
305 | speed_string = unknown_speed; | |
306 | else | |
307 | speed_string = pci_bus_speed_strings[value]; | |
308 | ||
309 | retval = sprintf (buf, "%s\n", speed_string); | |
310 | ||
311 | exit: | |
312 | return retval; | |
313 | } | |
314 | ||
f46753c5 | 315 | static struct pci_slot_attribute hotplug_slot_attr_cur_bus_speed = { |
1da177e4 LT |
316 | .attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO}, |
317 | .show = cur_bus_speed_read_file, | |
318 | }; | |
319 | ||
f46753c5 | 320 | static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf, |
1da177e4 LT |
321 | size_t count) |
322 | { | |
f46753c5 | 323 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
324 | unsigned long ltest; |
325 | u32 test; | |
326 | int retval = 0; | |
327 | ||
328 | ltest = simple_strtoul (buf, NULL, 10); | |
329 | test = (u32)(ltest & 0xffffffff); | |
330 | dbg ("test = %d\n", test); | |
331 | ||
332 | if (!try_module_get(slot->ops->owner)) { | |
333 | retval = -ENODEV; | |
334 | goto exit; | |
335 | } | |
336 | if (slot->ops->hardware_test) | |
337 | retval = slot->ops->hardware_test(slot, test); | |
338 | module_put(slot->ops->owner); | |
339 | ||
340 | exit: | |
341 | if (retval) | |
342 | return retval; | |
343 | return count; | |
344 | } | |
345 | ||
f46753c5 | 346 | static struct pci_slot_attribute hotplug_slot_attr_test = { |
1da177e4 LT |
347 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
348 | .store = test_write_file | |
349 | }; | |
350 | ||
498a8faf | 351 | static bool has_power_file(struct pci_slot *pci_slot) |
1da177e4 | 352 | { |
f46753c5 | 353 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 354 | if ((!slot) || (!slot->ops)) |
498a8faf | 355 | return false; |
1da177e4 LT |
356 | if ((slot->ops->enable_slot) || |
357 | (slot->ops->disable_slot) || | |
358 | (slot->ops->get_power_status)) | |
498a8faf KK |
359 | return true; |
360 | return false; | |
1da177e4 LT |
361 | } |
362 | ||
498a8faf | 363 | static bool has_attention_file(struct pci_slot *pci_slot) |
1da177e4 | 364 | { |
f46753c5 | 365 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 366 | if ((!slot) || (!slot->ops)) |
498a8faf | 367 | return false; |
1da177e4 LT |
368 | if ((slot->ops->set_attention_status) || |
369 | (slot->ops->get_attention_status)) | |
498a8faf KK |
370 | return true; |
371 | return false; | |
1da177e4 LT |
372 | } |
373 | ||
498a8faf | 374 | static bool has_latch_file(struct pci_slot *pci_slot) |
1da177e4 | 375 | { |
f46753c5 | 376 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 377 | if ((!slot) || (!slot->ops)) |
498a8faf | 378 | return false; |
1da177e4 | 379 | if (slot->ops->get_latch_status) |
498a8faf KK |
380 | return true; |
381 | return false; | |
1da177e4 LT |
382 | } |
383 | ||
498a8faf | 384 | static bool has_adapter_file(struct pci_slot *pci_slot) |
1da177e4 | 385 | { |
f46753c5 | 386 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 387 | if ((!slot) || (!slot->ops)) |
498a8faf | 388 | return false; |
1da177e4 | 389 | if (slot->ops->get_adapter_status) |
498a8faf KK |
390 | return true; |
391 | return false; | |
1da177e4 LT |
392 | } |
393 | ||
498a8faf | 394 | static bool has_max_bus_speed_file(struct pci_slot *pci_slot) |
1da177e4 | 395 | { |
f46753c5 | 396 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 397 | if ((!slot) || (!slot->ops)) |
498a8faf | 398 | return false; |
1da177e4 | 399 | if (slot->ops->get_max_bus_speed) |
498a8faf KK |
400 | return true; |
401 | return false; | |
1da177e4 LT |
402 | } |
403 | ||
498a8faf | 404 | static bool has_cur_bus_speed_file(struct pci_slot *pci_slot) |
1da177e4 | 405 | { |
f46753c5 | 406 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 407 | if ((!slot) || (!slot->ops)) |
498a8faf | 408 | return false; |
1da177e4 | 409 | if (slot->ops->get_cur_bus_speed) |
498a8faf KK |
410 | return true; |
411 | return false; | |
1da177e4 LT |
412 | } |
413 | ||
498a8faf | 414 | static bool has_test_file(struct pci_slot *pci_slot) |
1da177e4 | 415 | { |
f46753c5 | 416 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 | 417 | if ((!slot) || (!slot->ops)) |
498a8faf | 418 | return false; |
1da177e4 | 419 | if (slot->ops->hardware_test) |
498a8faf KK |
420 | return true; |
421 | return false; | |
1da177e4 LT |
422 | } |
423 | ||
f46753c5 | 424 | static int fs_add_slot(struct pci_slot *slot) |
1da177e4 | 425 | { |
660a0e8f | 426 | int retval = 0; |
1da177e4 | 427 | |
c825bc94 KK |
428 | /* Create symbolic link to the hotplug driver module */ |
429 | pci_hp_create_module_link(slot); | |
430 | ||
498a8faf KK |
431 | if (has_power_file(slot)) { |
432 | retval = sysfs_create_file(&slot->kobj, | |
433 | &hotplug_slot_attr_power.attr); | |
660a0e8f GKH |
434 | if (retval) |
435 | goto exit_power; | |
436 | } | |
1da177e4 | 437 | |
498a8faf | 438 | if (has_attention_file(slot)) { |
660a0e8f GKH |
439 | retval = sysfs_create_file(&slot->kobj, |
440 | &hotplug_slot_attr_attention.attr); | |
441 | if (retval) | |
442 | goto exit_attention; | |
443 | } | |
1da177e4 | 444 | |
498a8faf | 445 | if (has_latch_file(slot)) { |
660a0e8f GKH |
446 | retval = sysfs_create_file(&slot->kobj, |
447 | &hotplug_slot_attr_latch.attr); | |
448 | if (retval) | |
449 | goto exit_latch; | |
450 | } | |
1da177e4 | 451 | |
498a8faf | 452 | if (has_adapter_file(slot)) { |
660a0e8f GKH |
453 | retval = sysfs_create_file(&slot->kobj, |
454 | &hotplug_slot_attr_presence.attr); | |
455 | if (retval) | |
456 | goto exit_adapter; | |
457 | } | |
1da177e4 | 458 | |
498a8faf | 459 | if (has_max_bus_speed_file(slot)) { |
660a0e8f | 460 | retval = sysfs_create_file(&slot->kobj, |
498a8faf | 461 | &hotplug_slot_attr_max_bus_speed.attr); |
660a0e8f GKH |
462 | if (retval) |
463 | goto exit_max_speed; | |
464 | } | |
465 | ||
498a8faf | 466 | if (has_cur_bus_speed_file(slot)) { |
660a0e8f | 467 | retval = sysfs_create_file(&slot->kobj, |
498a8faf | 468 | &hotplug_slot_attr_cur_bus_speed.attr); |
660a0e8f GKH |
469 | if (retval) |
470 | goto exit_cur_speed; | |
471 | } | |
472 | ||
498a8faf | 473 | if (has_test_file(slot)) { |
660a0e8f GKH |
474 | retval = sysfs_create_file(&slot->kobj, |
475 | &hotplug_slot_attr_test.attr); | |
476 | if (retval) | |
477 | goto exit_test; | |
478 | } | |
479 | ||
480 | goto exit; | |
481 | ||
482 | exit_test: | |
498a8faf KK |
483 | if (has_cur_bus_speed_file(slot)) |
484 | sysfs_remove_file(&slot->kobj, | |
485 | &hotplug_slot_attr_cur_bus_speed.attr); | |
660a0e8f | 486 | exit_cur_speed: |
498a8faf KK |
487 | if (has_max_bus_speed_file(slot)) |
488 | sysfs_remove_file(&slot->kobj, | |
489 | &hotplug_slot_attr_max_bus_speed.attr); | |
660a0e8f | 490 | exit_max_speed: |
498a8faf KK |
491 | if (has_adapter_file(slot)) |
492 | sysfs_remove_file(&slot->kobj, | |
493 | &hotplug_slot_attr_presence.attr); | |
660a0e8f | 494 | exit_adapter: |
498a8faf | 495 | if (has_latch_file(slot)) |
660a0e8f | 496 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); |
660a0e8f | 497 | exit_latch: |
498a8faf KK |
498 | if (has_attention_file(slot)) |
499 | sysfs_remove_file(&slot->kobj, | |
500 | &hotplug_slot_attr_attention.attr); | |
660a0e8f | 501 | exit_attention: |
498a8faf | 502 | if (has_power_file(slot)) |
660a0e8f GKH |
503 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); |
504 | exit_power: | |
c825bc94 | 505 | pci_hp_remove_module_link(slot); |
660a0e8f GKH |
506 | exit: |
507 | return retval; | |
1da177e4 LT |
508 | } |
509 | ||
f46753c5 | 510 | static void fs_remove_slot(struct pci_slot *slot) |
1da177e4 | 511 | { |
498a8faf | 512 | if (has_power_file(slot)) |
1da177e4 LT |
513 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); |
514 | ||
498a8faf KK |
515 | if (has_attention_file(slot)) |
516 | sysfs_remove_file(&slot->kobj, | |
517 | &hotplug_slot_attr_attention.attr); | |
1da177e4 | 518 | |
498a8faf | 519 | if (has_latch_file(slot)) |
1da177e4 LT |
520 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); |
521 | ||
498a8faf KK |
522 | if (has_adapter_file(slot)) |
523 | sysfs_remove_file(&slot->kobj, | |
524 | &hotplug_slot_attr_presence.attr); | |
1da177e4 | 525 | |
498a8faf KK |
526 | if (has_max_bus_speed_file(slot)) |
527 | sysfs_remove_file(&slot->kobj, | |
528 | &hotplug_slot_attr_max_bus_speed.attr); | |
1da177e4 | 529 | |
498a8faf KK |
530 | if (has_cur_bus_speed_file(slot)) |
531 | sysfs_remove_file(&slot->kobj, | |
532 | &hotplug_slot_attr_cur_bus_speed.attr); | |
1da177e4 | 533 | |
498a8faf | 534 | if (has_test_file(slot)) |
1da177e4 | 535 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr); |
c825bc94 KK |
536 | |
537 | pci_hp_remove_module_link(slot); | |
1da177e4 LT |
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); | |
58319b80 | 547 | if (strcmp(hotplug_slot_name(slot), name) == 0) |
95cb9093 | 548 | return slot; |
1da177e4 | 549 | } |
95cb9093 | 550 | return NULL; |
1da177e4 LT |
551 | } |
552 | ||
553 | /** | |
c825bc94 | 554 | * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem |
65b943f6 | 555 | * @bus: bus this slot is on |
1da177e4 | 556 | * @slot: pointer to the &struct hotplug_slot to register |
c825bc94 | 557 | * @devnr: device number |
1359f270 | 558 | * @name: name registered with kobject core |
503998ca RD |
559 | * @owner: caller module owner |
560 | * @mod_name: caller module name | |
1da177e4 LT |
561 | * |
562 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow | |
563 | * userspace interaction to the slot. | |
564 | * | |
565 | * Returns 0 if successful, anything else for an error. | |
566 | */ | |
c825bc94 KK |
567 | int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, |
568 | int devnr, const char *name, | |
569 | struct module *owner, const char *mod_name) | |
1da177e4 LT |
570 | { |
571 | int result; | |
f46753c5 | 572 | struct pci_slot *pci_slot; |
1da177e4 LT |
573 | |
574 | if (slot == NULL) | |
575 | return -ENODEV; | |
576 | if ((slot->info == NULL) || (slot->ops == NULL)) | |
577 | return -EINVAL; | |
578 | if (slot->release == NULL) { | |
a6f29a98 | 579 | dbg("Why are you trying to register a hotplug slot " |
1da177e4 LT |
580 | "without a proper release function?\n"); |
581 | return -EINVAL; | |
582 | } | |
583 | ||
c825bc94 KK |
584 | slot->ops->owner = owner; |
585 | slot->ops->mod_name = mod_name; | |
95cb9093 | 586 | |
c825bc94 | 587 | mutex_lock(&pci_hp_mutex); |
8344b568 AC |
588 | /* |
589 | * No problems if we call this interface from both ACPI_PCI_SLOT | |
590 | * driver and call it here again. If we've already created the | |
591 | * pci_slot, the interface will simply bump the refcount. | |
592 | */ | |
c825bc94 | 593 | pci_slot = pci_create_slot(bus, devnr, name, slot); |
95cb9093 KK |
594 | if (IS_ERR(pci_slot)) { |
595 | result = PTR_ERR(pci_slot); | |
5fe6cc60 | 596 | goto out; |
1da177e4 | 597 | } |
64dbcac3 | 598 | |
f46753c5 AC |
599 | slot->pci_slot = pci_slot; |
600 | pci_slot->hotplug = slot; | |
601 | ||
f46753c5 | 602 | list_add(&slot->slot_list, &pci_hotplug_slot_list); |
f46753c5 AC |
603 | |
604 | result = fs_add_slot(pci_slot); | |
605 | kobject_uevent(&pci_slot->kobj, KOBJ_ADD); | |
1359f270 | 606 | dbg("Added slot %s to the list\n", name); |
95cb9093 KK |
607 | out: |
608 | mutex_unlock(&pci_hp_mutex); | |
1da177e4 LT |
609 | return result; |
610 | } | |
611 | ||
612 | /** | |
613 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem | |
65b943f6 | 614 | * @hotplug: pointer to the &struct hotplug_slot to deregister |
1da177e4 LT |
615 | * |
616 | * The @slot must have been registered with the pci hotplug subsystem | |
617 | * previously with a call to pci_hp_register(). | |
618 | * | |
619 | * Returns 0 if successful, anything else for an error. | |
620 | */ | |
f46753c5 | 621 | int pci_hp_deregister(struct hotplug_slot *hotplug) |
1da177e4 LT |
622 | { |
623 | struct hotplug_slot *temp; | |
f46753c5 | 624 | struct pci_slot *slot; |
1da177e4 | 625 | |
f46753c5 | 626 | if (!hotplug) |
1da177e4 LT |
627 | return -ENODEV; |
628 | ||
95cb9093 | 629 | mutex_lock(&pci_hp_mutex); |
58319b80 | 630 | temp = get_slot_from_name(hotplug_slot_name(hotplug)); |
95cb9093 KK |
631 | if (temp != hotplug) { |
632 | mutex_unlock(&pci_hp_mutex); | |
1da177e4 | 633 | return -ENODEV; |
95cb9093 | 634 | } |
1da177e4 | 635 | |
f46753c5 | 636 | list_del(&hotplug->slot_list); |
f46753c5 AC |
637 | |
638 | slot = hotplug->pci_slot; | |
639 | fs_remove_slot(slot); | |
58319b80 | 640 | dbg("Removed slot %s from the list\n", hotplug_slot_name(hotplug)); |
f46753c5 AC |
641 | |
642 | hotplug->release(hotplug); | |
643 | slot->hotplug = NULL; | |
644 | pci_destroy_slot(slot); | |
95cb9093 | 645 | mutex_unlock(&pci_hp_mutex); |
f46753c5 | 646 | |
1da177e4 LT |
647 | return 0; |
648 | } | |
649 | ||
650 | /** | |
651 | * pci_hp_change_slot_info - changes the slot's information structure in the core | |
65b943f6 | 652 | * @hotplug: pointer to the slot whose info has changed |
1da177e4 LT |
653 | * @info: pointer to the info copy into the slot's info structure |
654 | * | |
655 | * @slot must have been registered with the pci | |
656 | * hotplug subsystem previously with a call to pci_hp_register(). | |
657 | * | |
658 | * Returns 0 if successful, anything else for an error. | |
659 | */ | |
f46753c5 | 660 | int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug, |
660a0e8f | 661 | struct hotplug_slot_info *info) |
1da177e4 | 662 | { |
f46753c5 AC |
663 | struct pci_slot *slot; |
664 | if (!hotplug || !info) | |
1da177e4 | 665 | return -ENODEV; |
f46753c5 | 666 | slot = hotplug->pci_slot; |
1da177e4 | 667 | |
f46753c5 | 668 | memcpy(hotplug->info, info, sizeof(struct hotplug_slot_info)); |
1da177e4 LT |
669 | |
670 | return 0; | |
671 | } | |
672 | ||
673 | static int __init pci_hotplug_init (void) | |
674 | { | |
675 | int result; | |
0fed80f7 | 676 | |
1da177e4 LT |
677 | result = cpci_hotplug_init(debug); |
678 | if (result) { | |
679 | err ("cpci_hotplug_init with error %d\n", result); | |
f46753c5 | 680 | goto err_cpci; |
1da177e4 LT |
681 | } |
682 | ||
683 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
81ace5cd | 684 | |
f46753c5 | 685 | err_cpci: |
1da177e4 LT |
686 | return result; |
687 | } | |
688 | ||
689 | static void __exit pci_hotplug_exit (void) | |
690 | { | |
691 | cpci_hotplug_exit(); | |
1da177e4 LT |
692 | } |
693 | ||
694 | module_init(pci_hotplug_init); | |
695 | module_exit(pci_hotplug_exit); | |
696 | ||
697 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
698 | MODULE_DESCRIPTION(DRIVER_DESC); | |
699 | MODULE_LICENSE("GPL"); | |
700 | module_param(debug, bool, 0644); | |
701 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); | |
702 | ||
c825bc94 | 703 | EXPORT_SYMBOL_GPL(__pci_hp_register); |
1da177e4 LT |
704 | EXPORT_SYMBOL_GPL(pci_hp_deregister); |
705 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |