Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Dmitry Torokhov | fc7e482 | 2005-04-29 01:26:27 -0500 | [diff] [blame] | 75 | return attribute->show ? attribute->show(slot, buf) : -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Dmitry Torokhov | fc7e482 | 2005-04-29 01:26:27 -0500 | [diff] [blame] | 83 | return attribute->store ? attribute->store(slot, buf, len) : -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 485 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | if (has_cur_bus_speed_file(slot) == 0) |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 546 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_cur_bus_speed.attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 693 | int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot, |
| 694 | struct hotplug_slot_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 696 | int retval; |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
| 713 | if ((has_attention_file(slot) == 0) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
| 721 | if ((has_latch_file(slot) == 0) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | if ((has_adapter_file(slot) == 0) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | if ((has_address_file(slot) == 0) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
| 745 | if ((has_max_bus_speed_file(slot) == 0) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
| 753 | if ((has_cur_bus_speed_file(slot) == 0) && |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |